GNSS Simulator for the R&S®SMBV100A Vector Signal Generator

The new reference in satellite simulation

Key Facts

Whether in the R & D lab or in production, the global navigation satellite system (GNSS) solution for the R&S®SMBV100A sets new standards in the field of satellite simulation.

Brief Description

A number of standard tests are available for characterizing the performance of a GNSS receiver, e.g. time to first fix (TTFF) and location accuracy. Test runs often include an entire series of tests, each with a different scenario.

Specifications

GNSS Simulator for the R&S®SMBV100A
GNSS Systems GPS (C/A and P-code), Glonass, Galileo, BeiDou and QZSS/SBAS
Max. number of satellites up to 24 with hybrid constellations

Key Facts


Whether in the R & D lab or in production, the global navigation satellite system (GNSS) solution for the R&S®SMBV100A sets new standards in the field of satellite simulation. It supports all possible scenarios, from simple setups with static satellites all the way to flexible scenarios generated in realtime with up to 24 dynamic GPS, Glonass, Galileo, BeiDou and QZSS/SBAS satellites.

  • Support of GPS L1/L2 (C/A and P code), Glonass L1/L2, Galileo E1, BeiDou B1 and QZSS/SBAS L1, including hybrid constellations
  • Realtime 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
  • Realtime external trajectory feed for hardware in the loop (HIL) applications
  • Logging of simulation data
  • High signal dynamics1), 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 system (GBAS)
  • Support of other digital communications and radio standards in the same instrument

1) May be subject to export restrictions.

Brief Description

A number of standard tests are available for characterizing the performance of a GNSS receiver, e.g. time to first fix (TTFF) and location accuracy. Test runs often include an entire series of tests, each with a different scenario. Therefore, satellite simulators that allow users to simulate a wide variety of scenarios are ideal for this purpose.

This is where the flexibility of the GNSS solution for the R&S®SMBV100A stands out: Only a few keystrokes are needed to generate complex scenarios, unlimited in time, with up to 24 satellites – including hybrid GPS, Glonass, Galileo, BeiDou and QZSS/SBAS constellations. Users can select the almanac file as well as the geographic position, and both stationary positions and moving scenarios that simulate the movement of receivers along any custom route are possible. The signal strength of individual satellites can be controlled in realtime in order to simulate conditions of restricted satellite visibility.

The GNSS functionality provided by the R&S®SMBV100A also includes the ability to simulate realistic transmission and signal reception conditions through the use of multipath signal generation, by modeling various atmospheric effects and surroundings with buildings and bridges, or by simulating realistic vehicle dynamics.

The versatility of the R&S®SMBV100A is especially beneficial to mobile phone and car infotainment system manufacturers that integrate GNSS modules in their products, as it allows them to test a range of functions with a single instrument. This is possible because, in addition to GNSS signals, the R&S®SMBV100A also generates communications signals conforming to all conventional standards such as LTE, HSPA+ and WiMAX as well as signals for digital radio standards such as DAB, XM Radio or Sirius.

Specifications

General settings
Frequency   based on the RF band and GNSS hybrid configuration
    user-selectable in entire frequency range
Output level   based on power mode and individual satellite power parameters
    user-selectable in entire output level range of the R&S®SMBV100A
GNSS hybrid configuration   Hybrid GNSS constellation, e.g. 2 GPS satellites, 2 Glonass satellites and 2 Galileo satellites possible if R&S®SMBV-K44, R&S®SMBV-K94, R&S®SMBV-K66 are installed
Simulation modes   static mode, auto localization mode, user localization mode
Dynamics
   Pseudorange error (RMS)   ± 0.01 m
   Max. relative velocity   599 m/s or 10 000 m/s 2)
   Max. relative acceleration   1600 m/s2
   Max. relative jerk   400 m/s3 (as impulse)
GPS (R&S®SMBV-K44)
GPS   6 satellites, in line with ICD-GPS-200 revision D
RF bands   L1/E1, L2
GPS P code (R&S®SMBV-K93)
GPS   6 satellites, in line with ICD-GPS-200 revision D (antispoofing disabled)
RF bands   L1/E1, L2
Galileo (R&S®SMBV-K66)
Galileo   6 satellites, in line with OS SIS ICD, E1 band
RF bands   L1/E1
Glonass (R&S®SMBV-K94)
Glonass   6 satellites, in line with ICD-GLONASS Version 5.0
RF bands   L1/E1, L2
BeiDou (R&S®SMBV-K107)
BeiDou   6 satellites, in line with BDS-SIS-ICD-B1I-1.0
RF bands   B1I on L1/E1
QZSS (R&S®SMBV-K105)
QZSS   6 satellites GPS C/A and QZSS C/A,
in line with IS-QZSS V1.5
RF bands   L1/E1
SBAS (R&S®SMBV-K110)
SBAS   6 satellites, GPS L1 C/A and SBAS L1 C/A,
in line with DO-229D
RF bands   L1/E1
Assisted GNSS (R&S®SMBV-K65/-K67/-K95)
A-GNSS test scenarios   predefined A-GPS/A-Glonass test scenarios for GSM, 3GPP FDD, 3GPP2 and EUTRA/LTE
    user-definable
Generation of assistance data content almanac, ionosphere, navigation, UTC and acquisition files
  format in comma separated values (CSV) format, for navigation file also in standard RINEX format
RINEX import   ephemeris subframes can be configured manually or imported from a RINEX file
GNSS extension to 12 satellites (R&S®SMBV-K91)
GNSS extension to 12 satellites   simulation of up to 12 GNSS satellites, e.g. 8 GPS and 4 Galileo satellites (if R&S®SMBV-K44 and R&S®SMBV-K66 are both installed) or 12 C/A + P satellites (if R&S®SMBV-K44 and R&S®SMBV-K93 are both installed)
GNSS extension to 24 satellites (R&S®SMBV-K96)
GNSS extension to 24 satellites   simulation of up to 24 GPS C/A, Galileo and/or Glonass satellites, e.g. 12 GPS C/A, 8 Galileo E1 and 4 Glonass satellites (if R&S®SMBV-K44, R&S®SMBV-K66 and R&S®SMBV-K94 are also installed)
GNSS enhanced (e.g. moving scenarios, multipath) (R&S®SMBV-K92)
Moving scenario available in auto localization mode and user localization mode minimum duration of 12 hours before waypoint repetition, up to 4 days if R&S®SMBV-K511 is installed, up to 16 days if R&S®SMBV-K512 is installed
  supported formats CSV, NMEA, proprietary
Waypoint smoothing   trajectory and vehicle dynamics smoothing based on a selected vehicle description file
Realtime waypoint feed   hardware in the loop realtime feed of vehicle motion data; streaming rate up to 100 Hz; 10 ms system response delay
Atmospheric configuration   configuration of the ionospheric navigation parameters as they will be transmitted in the navigation message
    ionospheric and tropospheric models used in channel simulation
Multipath (satellite taps can be defined separately for each satellite; additional time shift, power, Doppler shift and carrier phase can be defined separately for each satellite tap)
  Channel budget GPS, Glonass, Galileo, BeiDou, QZSS, SBAS 24 channels (with R&S®SMBV-K96)
  Number of multipath taps   1 to 10 depending on remaining channel budget
GNSS extension for obscuration simulation and automatic multipath (R&S®SMBV-K101)
Obscuration and automatic multipath available in auto localization mode and user localization mode user-definable as well as predefined user environments (rural, suburban, urban canyon, tunnel, bridge, highway)
Land mobile multipath available for pedestrains and land vehicles elevation/azimuth grid with 4 possible states:
- obscuration
- line of sight
- line of sight and echoes
- echoes only
Number of channels   see R&S®SMBV-K92 data sheet; automatic selection of multipath signals based on elevation, multipath relative delay and amplitudes in case of insufficient number of channels
Update rate depends on simulated multipath/obscuration environment 5 Hz to 10 Hz
Physical model
  Obscuration and multipath requires R&S®SMBV-K92 simulates satellite visibility and multipath depending on a modeled user environment
  Obscuration only   simulates satellite visibility depending on a modeled user environment; multipath not simulated
GNSS extension for antenna pattern (R&S®SMBV-K102)
Antenna pattern/body mask available in auto localization mode and user localization mode simulates signal power and carrier phase response due to antenna pattern and body mask
  Number of antenna patterns   1 to 4
  Antenna pattern switching   possible through realtime scheduling
GNSS extension for spinning and attitude (R&S®SMBV-K103)
Spinning and attitude available in auto localization mode and user localization mode allows the configuration of the vehicle’s angular body parameters (attitude)
Attitude files requires R&S®SMBV-K92 minimum duration of 12 hours before waypoint repetition, up to 4 days if R&S®SMBV-K511 is installed, up to 16 days if R&S®SMBV-K512 is installed
Attitude smoothing requires R&S®SMBV-K92 vehicle attitude smoothing based on a selected vehicle description file
Realtime attitude feed requires R&S®SMBV-K92 hardware in the loop realtime feed of vehicle attitude data; streaming rate up to 100 Hz; 10 ms system response delay
Spinning   simulates a constant rate of change of roll
  Spinning rate   up to 400 Hz
GBAS in line with RTCA DO-246D
VHF data broadcast (VDB) tower configuration    
  Number of VDB transmitters   generation of up to 8 VDB tower signals
  Frequency number   -5 to 5
GBAS message configuration    
  Message types all messages can be modulated simultaneously if needed message types 1, 2, 4 and 11
  Waypiont file   used to load the TAP waypoint data modulated with GBAS message 4
  Differential GNSS file   used to transmit differential GNSS corrections for GPS, Glonass and SBAS satellites in view

These specifications in brief relate to the GNSS functionality of the R&S®SMBV100A. For specifications on the general performance of the R&S®SMBV100A or on the functionality of other digital standards, see the R&S®SMBV100A data sheet (PD 5214.1114.22) and the Digital Standards for Signal Generators data sheet (PD 5213.9434.22).
1) Depending on hardware option; may be subject to export restrictions.

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