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RF, HIL and Radar Test Abhay Samant Marketing Manager India, Russia and Arabia
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RF Hardware In The Loop • • • •
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Complex Radio Environment Components of RF HIL Communication Modems Channel Simulation GPS Simulation
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Complex Radio Environment Interference Navigational Aids Radiation pattern
Channel Amplifier
Amplifier Analog Tx Chain Baseband Processor
DUT Transmitter
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Platform Dynamics
Analog Rx Chain
Baseband Processor
vx Platform Trajectory
Topography
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DUT Receiver
Modeling Navigation Signals
Navigation Signals Tx Antenna Model
Amplifier Analog Tx Chain
Interference Platform Dynamics
Channel
Topography
Channel Model
Amplifier Analog Tx Chain
Baseband Processor
Baseband Processor
DUT Receiver
DUT Transmitter
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Rx Antenna Model
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Hardware-in Loop System Interference
Navigation Signals
Navigation Signals Channel
Switch
Amplifier Analog Tx Chain
Baseband Processor
Switch
Golden Transmitter
Golden Receiver
Analog Tx Chain Baseband Processor
Message Signal (Raw Data)
Measurements
DUT Transmitter ni.com
Amplifier
Demodulated data
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DUT Receiver
Hardware in-Loop – Subsystem level RF Amplifier
RF Analog Tx Chain
Baseband Processor
Test System
IF
Digital ni.com
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Receiver in-Loop Channel Simulator • Rayleigh fading •Rician fading •AWGN •IQ Gain Imbalance • Phase Imbalance
Modulated RF • BPSK Modulation • Rate ½ Convolution Code • Input PN Sequence • Data rate 2 Mbps • Bandwidth 4 MHz • Frequency range up to 6GHz
Channel Distorted Modulated RF path
RF path IF path
Baseband path DUT RF Frontend
DUT RF
BERT + Modulation Measurements (FPGA DIO)
Modulation Simulator
DUT Demodulated bits and Clock • 2Mbps
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Transmitter (VSG)
DUT IF
RF Tx+Rx (VSA + VSG)
Channel (FPGA)
DUT Baseband
Modem (FPGA)
Receiver (VSA)
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Channel Modeling
FPGA
Channel Models ni.com
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Standard Channel Implementation
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Rician
Rayleigh
AWGN
Multitone 9
Case Study : octoFade System Architecture
802.11n/ac Profile API
GSM Profile API
WCDMA Profile API
LTE Profile API
CDMA Profile API
WiMAX Profile API
Emulator API NI VST Note: greyed out profiles (802.11n/ac, CDMA and WiMAX) will be integrated in the future; 802.11n/ac logic currently available in software
Altera FPGA board
3GPP Compliant Channel Fader ni.com
VST = vector signal transceiver
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Generic models
Emulator Applications GUI
Complex Channel Modeling Channel Modeling Antenna Model Platform Dynamics Topography/ Terrain Model Atmospheric Model Motion Trajectory
User Inputs
Scenarios
3rd-party Modeling Software
Software Modeling
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IQ File
Streaming through Generator
Hardware
NI GPS Simulator •
Generate 24 hours of up to 12 satellite C/A codes (L1)
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Achieve automatic satellite simulation from almanac and ephemeris files
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Define custom motion trajectories for mobile simulation
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Adjust individual satellite power levels for scenario-specific test • Take advantage of manual control of satellite pseudo-range, Doppler, and power-level information •
• Generate WAAS satellites
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Specifications •
Output Frequency •
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Signal Quality • • •
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L1 1575.42 MHz C/A code Phase Noise: -82 dBc at 100 Hz offset Spurious 2nd Harmonic: -40dBC max Output 3rd order distortion: -75dBC typical
Power Output •
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-145 dBm to 10 dBm
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Modern Architecture of RADAR Analog RF Section
T R M
Receiver Front End
Transmitter Front End
DDC
ADC
Signal Processing DBF ADBF MTI MTD PC
DAC
Data Processing
MW RWC CFAR
Active Phased Array Antenna
Beamsteering Control
Weveforms Generation
RADAR Console
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Tracker
2B filter KF EKF PF
RADAR Design, Test and Validation
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Components Antenna IF Mixer
Filters
RF Mixer
Modulator
Power Amplifier
T/R Switch
STALO
COHO Limiter
Baseband processing Video
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Parametric Measurements Measurements • VSWR •Isolation • Insertion Loss • Max Power • Switching Time
Modulator
Antenna
T/R Switch
STALO
COHO Limiter
Baseband processing Video
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Measurements •Sensitivity •Selectivity •Dynamic range •Noise Floor •Pulse Mx
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Measurements •VSWR •Noise Figure •Bandwidth •Gain •Linearity •1dB Compression •IMD/ ToI
