Tag: simulator

2015 Simulator Buyers Guide
Special Section, March 2015. Download a PDF of this section, with the Simulator Product Showcase.

CAST Navigation

CAST-SGX GPS Satellite Simulator

The SGX GPS satellite signal simulator from CAST Navigation. Photo: CAST Navigation

The SGX GPS satellite signal simulator from CAST Navigation provides the user with dynamic, repeatable GPS RF signals for use in the laboratory or in the field for a wide range of GPS applications. The SGX simulator is housed in a portable, lightweight, handheld enclosure measuring 7 x 11 x 3 inches and weighing just over 4 pounds.

The SGX is lightweight and portable, operates on AC or battery power, and features 16 channels of L1 C/A and P codes. Based on CAST’s technology that has been developed for use in the company’s larger military products, it is extremely accurate and repeatable.

The SGX is controlled via an intuitive touchscreen interface that allows the user to select, start, and stop scenarios, change screen views, and change satellite RF power levels while a scenario is running. Three test scenarios are delivered with the simulator.

XGEN Plus Scenario Generation Software. This software gives the user the ability to generate custom scenarios for use with the SGX. The software allows for complete control over GPS almanac, ephemeris, and all satellite error sources.

The user can select from a variety of vehicle types and simulate static or dynamic motion. The user can also employ antenna gain patterns and vehicle silhouettes if desired. The user can generate a customized high precision six-degree-of-freedom trajectory simply by defining a mission profile that is based on raw maneuvers, waypoints, Google Maps or a combination of these maneuver types.The new scenarios can be downloaded via USB port or SD card interfaces.

CAST has been in the GPS simulation and support business for more than 30 years, designing, developing, manufacturing, and integrating innovative GPS/INS simulators and associated test equipment for government, military, prime vendor, and consumer markets.

www.castnav.com; phone: 978 858-0130; email: [email protected]

Cobham AvComm (formerly Aeroflex)

GPSG-1000 — Portable GPS/Galileo/SBAS Positional Simulator

Aeroflex
GPSG-1000: Portable GPS/Galileo/SBAS Positional Simulator Photo: Galileo

Designed to be a versatile yet affordable satellite simulator, the GPSG-1000 is proving to be a vital instrument used by those validating and testing GNSS receivers in a variety of applications within the transportation, consumer electronics, aerospace and military industry segments, to name a few.

The GPSG-1000 is a single carrier, multi-channel GPS/Galileo simulator that is portable and ruggedized so it can be safely and confidently deployed in a variety of outdoor and indoor environments. The unit is available in a 6- or 12-channel configuration, and supports the following GNSS signals: L1, L1C, L2C, L5, E1, E5, E5a, E5b and SBAS (WAAS and EGNOS).

The GPSG-1000 can be directly connected to a GNSS receiver under test. It can also simulate actual “open-sky” situations whereby the unit can generate its signals through the included antenna coupler system that isolates and transmits to the UUT’s antenna(s). Utilizing an integrated GPS receiver, the GPSG-1000 simulates actual time of day and date as well as the real constellation that would be available for navigation at that specific point in time. Multiple almanacs and route files can be saved to the GPSG’s memory, thereby enabling current and past history dynamic motion, constellation environment creation/recreation and other significant troubleshooting capabilities. During any given static or dynamic simulation, space vehicle parametrics and health can be user controlled.

The GPSG-1000 features a touchscreen user interface that can be remotely hosted via an integrated Ethernet port. The unit uses a rechargeable, Lithium Ion battery enabling hours of untethered use, and can also be used while the battery is recharging.

ats.aeroflex.com; phone: (316) 522-4981 or (800) 835-2352; email: [email protected]

IFEN Inc.

NavX-NCS Professional GNSS Simulator

NavX-NCS Essential GNSS Simulator

The NavX-NCS Professional GNSS Simulator by IFEN. Photo: IFEN

The absolute flexibility of the NavX-NCS Professional GNSS Simulator allows it to be configured with up to 108 channels and all of the following signals:
- GPS L1/L2/L5 C/A & P code and L2C
- GLONASS G1/G2 standard & high accuracy codes
- Galileo E1/E5/E6 (BOC/CBOC/AltBOC)
- BeiDou B1/B2/B3
- SBAS L1/L5 (WAAS, EGNOS, MSAS, GAGAN)
- QZSS L1 & L1-SAIF
- IMES
The user is enabled to assign signals freely to any of the RF modules fitted to the simulator. This allows the same hardware to be used in a range of different configurations.

Signals may be added by software license with no need to return the hardware for upgrade.

Up to four independent RF outputs may be fitted, enabling the user to simulate multiple antenna locations simultaneously (allowing simulation of multiple antennas on one vehicle, multiple vehicles simultaneously, a mixture of static locations and mobile vehicles, and multiple antenna elements for Controlled Reception Pattern Antenna [CRPA] testing).

The comprehensive and easy-to-use Control Center operating software allows the operator to quickly create realistic test scenarios for effective testing of user equipment.

IFEN also offers the NavX-NCS Essential GNSS Simulator, which is available with 21 or 42 channels and is capable of simulating GPS L1 (including SBAS L1), GLONASS G1, Galileo E1, BeiDou B1, QZSS L1, and IMES. The simulator is also supplied with Control Center operating software for comprehensive scenario generation.

www.ifen.com

For USA and Canada: Mark Wilson; phone: 951-739-7331; email: [email protected]

Racelogic

LabSat 3 Triple Constellation Simulator

RaceLogic LabSat 3. Photo: RaceLogic

LabSat 3 from Racelogic is a low cost, stand-alone, battery powered, multi-constellation RF record-and-replay device, designed to assist GNSS engineers in the development and testing of their products.

With its small size and all-in-one design, LabSat 3 makes it easier than ever to collect raw satellite data in the same environment that end users experience in everyday use. This enables repeatable and realistic testing to be carried out under controlled conditions.

LabSat 3 doesn’t need to be connected to a PC in order to record live-sky GNSS signals. With one-touch recording to SD card and a two-hour battery life, it can be used in any outdoor location to create real-world scenarios, for eventual replay back in the lab. As well as being able to simultaneously record or replay GPS, GLONASS, BeiDou, QZSS, Galileo, and SBAS signals, it can log CAN Bus, serial, or digital data, embedded alongside the satellite information. This additional information can then be replayed alongside the GNSS output, with synchronization to within 60 ns. A 1PPS signal can also be generated using the internal GPS receiver.

LabSat 3 can be used as a replay system out of the box with a set of 60 pre-recorded scenarios supplied as part of the package, recorded from various locations around the globe. Additionally, SatGen software, a demo version of which is available from the LabSat website, allows for
scenario generation of user-defined trajectories, with precise control over velocity, heading, height, and constellation profiles. Routes are also easily created in Google Maps, and the software also supports NMEA and KML file import. SatGen gives test engineers the ability to develop their products using simulations that would be difficult or impossible to record due to geographic location or safety constraints.

LabSat 3 is available as a record and replay, or replay-only version; either one, two, or three constellation types generate a single, dual, or triple constellation file.

LabSat is currently used by many leading manufacturers of GPS chipsets, portable navigation devices, smartphones, and by major car companies in their test, development and production processes.

www.labsat.co.uk; phone: +44 (0)1280 823803

Rohde & Schwarz

R&S SMBV100A: GNSS Simulator in Vector Signal Generator

The R&S SMBV100A: GNSS Simulator in Vector Signal Generator. Photo: R&S

The GNSS simulator in the vector signal generator R&S SMBV100A is designed for development, verification and production of GNSS chipsets, modules and receivers. The simulator supports all possible scenarios, from simple setups with individual, static satellites all the way to flexible scenarios generated in real time with up to 24 dynamic GPS, GLONASS, Galileo, BeiDou and QZSS satellites.
- GNSS simulator with support of GPS L1/L2 (C/A and P code), GLONASS L1/ L2, Galileo E1, BeiDou and QZSS L1, including hybrid constellations.
- Real-time simulation of realistic constellations with up to 24 satellites and unlimited simulation time.
- Flexible scenario generation including moving scenarios, dynamic power control and atmospheric modeling.
- Configuration of realistic user environments, including obscuration and multipath, antenna characteristics and vehicle attitude.
- Static mode for basic receiver testing using signals with zero or constant Doppler shift.
- Support of Assisted GNSS (A-GNSS) test scenarios, including generation of assistance data for GPS, GLONASS, Galileo, BeiDou and QZSS.
- Real-time external trajectory feed for hardware in the loop (HIL) applications.
- High signal dynamics, simulation of spinning vehicles and precision code (P-code) simulations to support aerospace and defense applications.
- Enhanced simulation capabilities for aerospace applications by supporting ground-based augmentation systems (GBAS).
- Support of other digital communications and radio standards in the same instrument.
www.rohde-schwarz.com; email: [email protected]

Spectracom

Afforable, Flexible and User-Friendly GNSS Simulators

The Spectracom family of simulators. Photo: Spectracom

Spectracom GNSS Simulators support test and development programs from simple manufacturing tests to multi-output testing across the diverse ecosphere of industries relying on GNSS technology. Spectracom’s innovation allows users of any skill level full control over the GNSS constellation, vehicle motion/attitude and signal path complications such as atmospherics and multipath to develop complex scenarios. Typical test conditions include:
- Clock errors
- Data errors
- “Real-world” motion from embedded Google Maps
- In-band noise generation
- Multipath
- Signal obstructions calculated from 3D building models
- “Current time” simulation
- Real-time HIL testing
- Easy synchronization for multi-output testing
- Automative download of the current almanac
- Antenna pattern effects
- Inertial sensor testing
- Assisted GNSS testing
No dedicated PC is required. Scenarios are run and managed from the front panel, SCPI commands, or any PC/tablet via a web interface. Users can select a flexible, field upgradeable Spectracom simulator, and then purchase the software options they need.

GSG-6 Series multi-frequency, advanced GNSS simulator is powerful enough for any cutting-edge test program. GPS, GLONASS, Galileo, Beidou, QZSS and IRNSS signals are available across multiple frequencies. The GSG-6 is designed for military, research or professional applications.

GSG-5 Series multi-constellation L1-band GNSS simulator is designed for commercial development/integration programs. If a user is developing commercial products with GNSS capability, the GSG-5 will shorten test programs with confidence.

GSG-51 single channel signal generator is designed for one purpose — fast, simple go/no-go manufacturing test and validation, ensuring the manufacturing line is operating at full capacity with confidence in quality.

www.spectracom.com; email: [email protected]; phone: 585-321-5800

Spirent Federal Systems

GNSS Simulators

Spirent’s GSS9000 constellation simulator. Photo: Spirent

Spirent provides simulators that cover all applications, including research and development, integration/verification and production testing.

GSS9000. The newly released Spirent GSS9000 multi-frequency, multi-GNSS RF constellation simulator can simulate signals from all GNSS and regional navigation. The GSS9000 offers a four-fold increase in RF signal iteration rate (SIR) over Spirent’s GSS8000 simulator. The GSS9000 SIR is 1000 Hz (1 ms), enabling higher dynamic simulations with more accuracy and fidelity. It includes support for restricted and classified signals from the GPS and Galileo systems, as well as advanced capabilities for ultra-high dynamics. It can evaluate resilience of navigation systems to interference and spoofing attacks, and has the flexibility to reconfigure constellations, channels and frequencies between test runs or test cases.

Hardware changes can be done in the field, supported by the new on-board calibrator module. The GSS9000 is extensible and can support the widest range of carriers, ranging codes and data streams for the Galileo, GPS, GLONASS, and BeiDou systems, as well as regional/augmentation systems. Multi-antenna/multi-vehicle simulation, for differential-GNSS and attitude determination, and interference/jamming and spoofing testing are also supported.

CRPA Test System. Spirent’s Controlled Reception Pattern Antenna (CRPA) Test System generates both GNSS and interference signals. Users can control multiple antenna elements. Null-steering and space/time adaptive CRPA testing are both supported by this comprehensive approach.

GSS6425. The Spirent GSS6425 RPS quickly and simply records complex real-world RF environments, capturing both GNSS signals and atmospheric/interference effects. These environments can then be replayed repeatedly to the hardware software under test, reducing project, travel and engineering costs.

www.spirentfederal.com; Jeff Martin, Director of Sales; Kalani Needham, Sales Manager; email: [email protected]; phone: 801-785-1448; fax: 801-785-1294
March 3, 2015
Software-Based GNSS Multi-System Simulation Environment

TeleOrbit’s software-based GNSS multi-system performance simulation environment, GIPSIE, consists of a satellite constellation simulator and an intermediate frequency simulator. The digital signal simulator GIPSIE streams the software-generated signals or recorded live data exactly into the receiver’s baseband processing chain to support development, test, verification, validation, qualification and certification.

Features include simulation of multi-system, multi-frequency scenarios GPS L1/L2/L5 and Galileo E1/E5/E6; simulation of jamming signals on top of the GNSS signals; simulation of Galileo PRS-like signals as well as the unencrypted GPS P-Code signals; record and replay of recorded and software generated data. GLONASS and BeiDou constellations and signals and simulation of micro-electro-mechanical sensors (MEMS) are coming soon.

March 1, 2015
MWC 2015: Anritsu to Showcase Cloud-Based Connected Car System for Fleets

Photo: Anritsu

Anritsu plans to showcase a sophisticated, cloud-based connected car system for fleet tracking at Mobile World Congress 2015, which will be held in Barcelona March 2-5. The system was developed by the University of Hertfordshire in the UK with the help of network simulation technology from Anritsu.

The system will be demonstrated using a GNSS simulator from Spectracom to provide location information to the system being tested.

The connected car demonstration will show a car’s diagnostics system connecting to the cloud via a simulated LTE network environment provided by Anritsu’s mobile network simulator, the MD8475A. An application in the cloud enables a fleet manager on any Internet-connected device to view the location and operating parameters of any vehicle in the fleet in real time.

The MD8475A enables the university’s development team to test, from their Hertfordshire laboratory and with a single instrument, how the system’s in-car LTE modem would perform in mobile networks all across the world, and operating according to all major worldwide standards.

The combination of the MD8475A and the Spectracom simulator provides a complete test environment, to simulate any global location, and any type of cellular connectivity, to ensure correct operation of the system. This test bed will showcase the effectiveness of a complete wireless test-bed solution, to enable cost-effective development testing, product validation, and customer experience evaluation within a single system.

Anritsu Corporation has been a communications provider solutions for more than 110 years, with test and measurement solutions including wireless, optical, microwave/RF and digital instruments, operations support systems and solutions that can be used during R&D, manufacturing, installation and maintenance.

February 25, 2015
Spirent Simulator Granted Security Approval by GPS Directorate

Spirent’s GSS9000 constellation simulator.

Spirent Federal Systems, a U.S. provider of positioning, navigation and timing test solutions to the government and its contractors, announces that its GSS9000 RF constellation simulator has been reviewed and granted security approval by the GPS Directorate.

Higher dynamic simulations with more accuracy and fidelity are enabled by 1000-Hz (1 ms) System Iteration Rate — a four-fold increase over Spirent’s current GSS8000 product — zero inter-channel bias and a 0.3 mm RMS pseudorange accuracy. The GSS9000 also includes support for restricted and classified signals from the GPS and Galileo systems as well as advanced capabilities for ultra-high dynamics.

According to Spirent, the GSS9000 is being rapidly adopted worldwide by key GNSS system and solution developers and providers because of its flexibility, performance and capability. The GSS9000 builds on the capability and performance of previous solutions from Spirent.

The GSS9000 is highly flexible and can support the widest range of carriers, ranging codes and data streams for the GPS, GLONASS, Galileo and BeiDou as well as regional/augmentation systems. Its flexibility is key to supporting tailored and customizable solutions for specific and unique test needs. Multi-antenna/multi-vehicle simulation, for differential-GNSS and attitude determination, and interference/jamming and spoofing testing are also supported.

September 15, 2014
Spirent’s SimSAFE Fights Signal Vulnerability

Spirent’s SimSAFE Fights Signal Vulnerability.

By Tracy Cozzens

Spirent Communications now offers SimSAFE, a software solution that simulates legitimate GNSS constellations along with spoofed or hoax signals to evaluate receiver resilience and help develop counter measures.

Hoax or spoofing attacks work by mimicking genuine GNSS signals, which mislead GNSS receivers. The military and critical infrastructure — such as wireless networks, banking, and utilities — are especially interested in being able to detect and reject spoofing attacks.

“GNSS signal vulnerability is becoming a significant issue,” said John Pottle, marketing director of Spirent’s Positioning Division. “The industry is beginning to talk more about vulnerability and how we actually think about categorizing the threat — what approaches are there to evaluate performance in the presence of interference signals? If you’re a developer, what approaches are there to clean up your performance? You’ll see us at Spirent being quite a bit more vocal about these areas in the coming months.”

SimSAFE was developed in conjunction with Qascom, a small organization of half a dozen GNSS signal security and authentication experts headed by Oscar Pozzobon, who served as the chief solutions architect for SimSAFE. Pozzobon contributed his knowledge of GNSS security and vulnerabilities, which were then integrated into the SimSAFE system.

SimSAFE provides a means of emulating a spoofing attack, and then monitoring a receiver under attack to evaluate mitigation strategies and countermeasures.

“SimSAFE really gets into details on how a receiver reacts in the presence of the hoax signals,” Pottle said. “By really understanding that, really getting into how is the receiver is acting and reacting, you can understand better how your receiver is likely to behave, and tune it up.”

The SimSAFE laboratory-based test solution is fully controllable, so that users can evaluate a receiver’s response to a wide range of spoofing attacks. As Pottle put it, when fed both authentic and spoofed signals, “What’s the receiver going to see? It’s going to see the authentic signals, it’s going to see a couple of spoofed signals. And you can play around with the spoofed signals — that’s the controllable bit. While this is happening, the detector module within SimSAFE monitors and reports the receiver’s response to the attacks. At its most simple, that’s the power of SimSAFE.”

SimSAFE is aimed not only at receiver developers, a core audience of Spirent’s, but at anyone trying to build a system that may be subject to intentional interference, such as in the military or critical infrastructure. “Those people are starting to ask questions about what should I be worried about? What kind of an attack might I be open to? How can I be sure, if I’ve got a choice of three or four receivers, that I’m going to choose one that meets my needs in terms of resilience to intentional interference?” Pottle said. “Our belief is that SimSAFE will allow people to evaluate different receivers and strategies for mitigating spoofing attacks, and therefore help them to build the right level of resilience in their systems.”

SimSAFE is available in two variants. SimSAFE Simulated uses the simulator for all signals, both satellite and spoofed, using one or more channels for the spoofed signal.

Instead of a simulator, SimSAFE Live pulls authentic signals from sky with an antenna, so the user has the full power of the simulator to generate a much broader range of spoofing attacks. “The clever bit is aligning the spoofed signal with the real signal, getting the timing and frequency synced up,” Pottle said.

Spirent is also working on other technologies to mitigate spoofing, including work with interference signals from ground-based transmitters, adaptive antenna lab-based tests, and integration with inertial sensors, such as in military jets.

SimSAFE’s signal control capabilities.

March 1, 2014
CHC Offers GNSS Post-Processing Software

CHC announced today the availability of CHC Geomatics Office (CGO), a software solution dedicated to post processing static and kinematic GNSS raw data. CGO supports GPS+GLONASS+BeiDou data in various raw data formats and is compatible with major brands, allowing a seamless integration with an existing pool of equipment, the company said.

“CGO is undoubtedly the most affordable yet powerful GNSS post processing software available in the market.” says George Zhao, CEO of CHC. “In addition, this new product launch reinforces our commitment to provide full GNSS solutions to our customers including post-processing applications.”

A 90-day fully functional demonstration license is available to enable users to evaluate the CGO’s features before purchasing.

CHC designs, manufactures and markets a wide range of professional GPS/GNSS solutions in more than 50 countries. Headquartered in Shanghai (China), CHC is a GPS/GNSS manufacturer with a strong international presence and employs more than 500 professionals worldwide.

January 14, 2014
Rohde & Schwarz GNSS Simulator Creates Real-World Scenarios

Rohde & Schwarz provides developers of satellite-based navigation instruments with a global navigation satellite system (GNSS) simulator, which runs on the R&S SMBV100A vector signal generator. The new R&S SMBV-K101 option allows developers in the automotive and wireless communications industries, for example, to test GNSS receivers for specific effects such as obscuration and multipath propagation. Buildings, tunnels and bridges as well as reflections from concrete and glass surfaces affect the GNSS signal, regardless of whether the receiver is stationary or in motion. This option makes it easy to configure these kinds of scenarios.

If the GNSS receiver of a navigation instrument or smartphone is located inside a vehicle, testing must also take into account the obscuring effect of the vehicle’s metal body. The R&S SMBV-K102 option can simulate this obscuration and, if required, also the additional antenna pattern.

In addition to test scenarios for A-GPS, smartphone developers also have the Assisted Galileo (R&S SMBV-K67) and Assisted GLONASS (R&S SMBV-K95) options at their disposal. (Mobile radio networks transmit location-specific information to wireless devices via A-GNSS so that they can determine the current position faster.)

In many cases, navigation instruments handle signals of digital communications standards other than GNSS. As the first GNSS simulator of its kind on the market, the R&S SMBV100A also supports these standards. Now, manufacturers of mobile phones and car radios with integrated GNSS receivers need just one signal generator to test multiple functionalities. The R&S SMBV100A can also be used to perform interference tests on the DUT.

Users in the aerospace and defense industry can use the R&S SMBV-K103 option to simulate the relative position of a flying object as well as its rotation at a rotation rate of up to 400 Hz. This allows developers to perform lab tests to determine how a flying object’s different positions, the ground reflection of GNSS signals and rotary movements affect reception quality.

The GNSS simulator in the R&S SMBV100A uses up to 24 satellites to generate signals in realtime for GPS with civilian C/A code and military P code as well as for Glonass and Galileo in different constellations. In just a few steps, users can define their own scenarios for testing their GNSS receivers under various conditions. The R&S SMBV100A is the only GNSS simulator on the market that does not require an external PC. As a result, it is easier to automate, and test setup is simple.

The new options for the GNSS simulator in the R&S SMBV100A are now available from Rohde & Schwarz.

July 15, 2013
Designing for the Future: Signal Simulation for Expanding GNSS

Sponsored by: Hemisphere
Broadcast Date: Thursday, May 16, 2013
Moderator: Alan Cameron, Editor & Publisher, GPS World
Speakers: Mark Sampson, LabSat Product Manager, RaceLogic; John Fischer, Chief Technology Officer, Spectracom; Markus Lörner, Product Manager, Rohde & Schwarz; Steve Hickling, Lead Product Manager, Spirent Communications; Mark Wilson, Vice President of Sales, IfEN GmbH

Simulation and testing experts offer key technical insights on the intricacies and importance of product and signal testing, whether by simulator, record-and-replay, or in the field, in the increasingly complex environment of multiple modernizing and expanding GNSS signals, from GPS III to BeiDou, with Galileo coming on strong and GLONASS a perennial standby.

May 17, 2013
What’s New in GNSS Simulation?

It used to be that if you were going to build an RF navigation receiver, you had to also build your own simulation system to test it. I remember working with a couple of “home-built” RF simulation systems myself, way back when. We experience a lot of maintenance and support issues. And, of course, if you build something and also build something to test it, its likely that incorrect assumptions will end up in both systems. Today, there are a number of excellent sources for GNSS simulation equipment and support you can buy on the open market.

The spectrum of today’s providers seems to range from highly sophisticated scientific systems used for development by precision receiver manufacturers, through systems with GNSS and aiding solutions, to specialized systems for both general and specific application developers and also for production test. So this month I’d like to try to summarize (in no particular order) what some of the suppliers of GNSS simulation systems are up to, how they may be positioned in the market and, wherever possible, what we might expect to see from them in the future.

GSG Series 6 GNSS simulator.

Spectracom is a more recent entrant to the GNSS simulation market, though the company has been providing frequency and time synchronization test equipment for about 40 years. Spectracom has integrated GPS into these products for more than ten years, and decided three years ago to use the knowledge it had gained to get into the GNSS simulation business.

The GSG family of simulators is positioned at the “affordable” end of the simulation equipment scale, and is targeted at users and integrators of GNSS, rather than developers of receivers. Spectracom claims to have about 80 percent of the features of the top-end simulations systems, but its more capable (Series 6) systems sell in the $20-30k range. While new to the business, the Spectracom team feels that this allows them to bring the newest technology and innovation to the market.

The Spectracom system is derived from its well-known frequency/time synthesizer equipment — in fact, it has the same look front panel and chassis — and also makes use of the same “easy-to-use” concepts. “It doesn’t take a navigation scientist to operate these simulators,” said John Fischer, chief technology officer at Spectracom. The accompanying Studio View software is reportedly relatively easy to use to generate trajectories and other test scenarios by connecting to Google Maps and uploading them to the simulator.

But with all new firmware and FPGA implementation, 64 channels, and four frequency bands covering both GPS and GLONASS, the GSG family appears to be very well positioned for application developers integrating GNSS. Galileo and Beidou/Compass are in the works and expected this year, and will be supplied as upgrades to existing equipment.

Spectracom anticipates significant growth in its target market for application developers in “anything that moves,” including automotive and airborne, video matching, radar/lidar, and handheld nav devices, including mobile phones. Spectracom has a number of product lines and around 100 people working for them, but the GNSS simulation group is around 12 strong.

Rohde & Schwarz is another relatively recent GNSS simulation entrant with new products for the market.

SMBV100A vector signal generator.

Its current offering — the SMBV100A Vector Signal Generator – can simulate 24 dynamic GPS, GLONASS and Galileo satellites. The SMBV 100A has wide bandwidth and high output power levels. Real-time test scenarios can be customized by the user — including a neat facility that allows modeling of satellite masking by downtown buildings, along with anticipated multipath for the same urban scenario.

While somewhat new to GNSS simulation, R&S has been around since the 1930s, and its experience with frequency synthesizers and similar equipment is being carried forward into what the company terms its “cost-effective” GNSS simulation offerings. R&S anticipates significant growth in automotive, aerospace, UAV, and cellular assisted-GNSS application markets.

R&S has had success in the aerospace market for UAVs, and has developed the capability to model antenna patterns and UAV body mask as the vehicle rotates and attitude changes towards visible satellites. Along the same lines, R&S has hooked up its system to flight simulators and provided hardware-in-the-loop testing for clients. R&S also has the ability to run simulation scenarios for long periods of time, and for “very long” periods if the receiver is stationary — this feature makes use of large internal memory storage within the SMBV100A; of course, almanac validity limits just how long this is possible. P-code capability is provided as an option, and there is a roadmap for adding SBAS and Beidou capability later.

IFEN NavX-NCS Professional

In the meantime, IFEN in Germany is focusing on its NavX-NCS Navigation Constellation Simulator range of multi-GNSS signal simulators.

IFEN emphasizes the flexibility of its design, with a platform scalable from a 12-channel GPS L1 system up to a full multi-GNSS system with 108 channels and 9 frequencies for GPS, GLONASS, Galileo, QZSS and SBAS. With this building-block approach, channels and capabilities can be added as and when additional testing complexity is required.

IFEN claims that the capability to generate all GNSS signals — by combining different modulations with up to nine L-band frequencies — is the only existing solution on the market providing GPS, Galileo, GLONASS, QZSS and SBAS in one chassis at the same time. And, since April 2013, all IFEN NavX-NCS GNSS RF signal simulators are to include BeiDou B1 signal capability in accordance with the official Chinese BeiDou B1 ICD, and are ready for the other B2 and B3 BeiDou signals.

IFEN also founded a subsidiary in the USA in January this year called IFEN, Inc., located in California and operational with Mark Wilson (formerly with Spirent) as VP Sales. In addition, IFEN has formed a partnership with WORK Microwave — a leading European manufacturer of advanced satellite communications and navigation equipment. WORK Microwave is responsible for RF and digital hardware design while IFEN develops the associated software and manages the distribution of the product range.

Little-known IP-Solutions in Tokyo, Japan, has been working to develop its ReGen GNSS DIF signal simulator, a software simulator that simulates ionospheric effects, generates digital IF (DIF) signals similar to those recorded by an RF recorder, and comes with an optional capability of simulating integrated inertial navigation.

IP-Solutions’ digital IF baseband signal simulator ReGen has been developed in close cooperation with the Japan Aerospace Exploration Agency (JAXA) to test and validate GNSS signal processing algorithms and methods for use on board aircraft using tight and ultra-tight integration with INS, including specific scintillation models and ionospheric bubble simulation.

Actual recorded flight data (left), ReGen replicated flight data (right).

Various configurations of ReGen can produce multichannel GPS and GLONASS L1 signals and single-channel GPS L1, L2, L5 and GLONASS L1 and L2 signals, as well as simulating noise and interference.

Meanwhile, Spirent, arguably the original market leader in GNSS simulation, has continued along its chosen path of supplying the industry with the greatest capability and most extensive simulation systems.

Spirent has recently released test systems with support for China’s BeiDou Navigation Satellite System in addition to GPS, GLONASS and Galileo.

Spirent started shipping BeiDou-ready systems to its customers in 2012. Now these may be upgraded to full BeiDou capability using the information available in the first full issue of the BeiDou-2 Signal In Space Interface Control Document (ICD).

Also aiming at mobile applications, Spirent’s Hybrid Location Technology Solution (HLTS) integrates Wi-Fi, Assisted Global Navigation Satellite System (A-GNSS), Micro Electro-Mechanical Systems (MEMS) sensor and cellular positioning technologies. HLTS integrates four very different and distinct location technologies and provides repeatable and reliable lab-based characterization of mobile devices supporting hybrid location technologies that will enable “accurate everywhere” location — including indoor user location determination.

Other notable players in the GNSS simulation business include Racelogic, CAST Navigation and Agilent who are each pursuing their chosen niches in this expanding market segment. Racelogic’s LabSat GPS simulator is gaining popularity with a number of leading companies, providing the ability to record and replay real GNSS RF data as well as user-generated scenarios. CAST has an extensive line-up of GPS and GPS/INS simulation systems and support software, and Agilent has added to its impressive electronic testing portfolio with a very capable looking GPS simulation product line.

Several other companies — some based in China and Russia — are also trying to figure out their development and marketing strategies to conquer their chosen GNSS simulation market niche. This is all a very healthy sign that there are many other companies with new embedded GNSS applications that they are bringing to market and who therefore need GNSS simulation/test capability. Overall, this means there is still significant growth underway and far wider applications of GNSS on their way to market. Great news for the GNSS industry!

Tony Murfin
GNSS Aerospace

May 8, 2013
Spectracom Simulator Compatible with China’s Beidou System

Spectracom has announced its upgrade capability to China’s global navigation satellite system, Beidou. The Spectracom GSG Series 5 and Series 6 GNSS signal simulators, released in 2012, are designed to be field upgradeable to simulate current and future GNSS constellations. GSG simulators are capable of outputting the frequencies, modulations and data formats of anticipated GNSS systems. The January release of the Beidou ICD specification has confirmed that Spectracom GPS/GNSS simulators will be able to emulate these satellite signals with a simple field-upgradeable firmware update.

“In anticipation of the deployment of these new, major GNSS systems, Spectracom ensures that every GSG simulator that leaves the factory is tested for compliance with all the signal frequency and modulation specifications as defined in their ICDs. Customers who have purchased our Series 5 or 6 simulators since June 2012 have this upgrade capability,” Spectracom CTO John Fischer said.

Spectracom GSG-6 series simulator. Photo: Spectrum

The Series 5 single frequency simulator is fully capable of the all the signals in the L1 (GPS and GLONASS) / E1 (Galileo) / B1 (Beidou) band, including all the GLONASS FDMA satellites.

The Series 6 multi-frequency simulator is fully capable of all four bands of all the systems: L1 / E1 / B1; L2 / L2C; L5 /E5 /B2; and E6 / B3.

Fischer added, “As the need for new signals arise, firmware upgrades will be available. This ensures our customer’s investment is protected. Galileo signals will be available this year and Beidou will be available next year.”

February 20, 2013
Spirent Technical Interchange Features Hands-on Demonstrations
Next month Spirent is hosting a meeting with hands-on training sessions on GNSS simulation equipment led by Spirent engineers. The 2013 Spirent Federal 2013 GNSS Technical Interchange Meeting will be held March 19-21 at the DoubleTree Hotel Anaheim-Orange County, in Orange, California.

March 19 and 20 are for general participation. The third day, March 21, features FOUO (For Official Use Only) sessions for U.S. citizens only.

Topics covered include:
- SVN49 anomaly simulation
- Utilizing Remote Control and Motion
- Advanced Modeling and Simulation Techniques
- Differential GPS and Augmentation Systems
- Multi-GNSS constellation testing
- Integrated GPS/inertial testing (FOUO Session)
- M-code simulation (FOUO Session)
- CRPA testing (FOUO Session)
View the tentative schedule. (PDF)

The registration rate of $125 covers all meals and parking for three days.
February 8, 2013
Symmetricom Enhances SSU 2000 Platform with GLONASS

Symmetricom, Inc. today announced two new capabilities for its SSU 2000 Synchronization Supply Unit: a GLONASS timing reference that uses signals from the satellite navigation system operated by the Russian Aerospace Defense Forces, and Synchronous Ethernet (SyncE), an ITU-T synchronization standard that delivers frequency synchronization over the Ethernet physical layer.

This enhanced version of the SSU 2000 will be the first in a series of forthcoming Symmetricom products that include GLONASS capabilities.

Available as an integrated card for the Symmetricom SSU 2000, the GLONASS referencing feature will allow customers to support both GPS and GLONASS simultaneously, providing added protection should signals from one navigation system become unavailable. GPS has long served as the primary reference signal for timing and synchronization in telecommunications and other networks. Operators in some regions prefer to use the GLONASS system, either as the primary time reference or in conjunction with GPS signals. Symmetricom has enhanced the SSU 2000 satellite receiver functionality to meet this demand.

“GLONASS signals have become an important primary reference for timing and synchronization systems,” said Laura Finkelstein, vice president of product management for Symmetricom. “The SSU 2000 is well-established as the synchronization platform for communication service providers globally. The integrated capability to simultaneously support both GPS and GLONASS provides our customers another way to improve the reliability of their network.”

Timing and synchronization are a focal point technology in Ethernet and mobile carrier networks today. Synchronous Ethernet allows frequency signals to transfer at the physical layer over Ethernet, helping improve network reliability by offering synchronization services to Carrier Ethernet networks. Using SyncE to complement IEEE 1588 Precision Time Protocol (PTP) can enhance PTP services being delivered to mobile base stations deployed in radio access networks. The new SSU 2000 capability puts SyncE and PTP on the same output port, thus providing an ideal synchronization solution for the evolution of mobile networks as they extend coverage and increase capacity.

Designed in a NEBS-compliant package, the SSU 2000 integrates intelligent functional modules into a flexible, fully redundant system. This enables telecom network operators to seamlessly satisfy current and future requirements for generating and distributing superior synchronization signals for advanced network services.

The SSU 2000 has been deployed in more than 125 countries as a timing and synchronization distribution system for communications service providers.

February 5, 2013