Sensors I RadaScan: A local reference, high resolution ...
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Sensors I RadaScan: A local reference, high resolution radar, dynamic positioning sensor Dr. Dominic Pearce Guidance Navigation Limited (United Kingdom) Return to Session Directory
Transcript of Sensors I RadaScan: A local reference, high resolution ...
Sensors I
RadaScan: A local reference, high resolution radar, dynamic positioning sensor
Dr. Dominic PearceGuidance Navigation Limited (United Kingdom)
Return to Session Directory
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Introdcution
Introduction RadaScan: a high resolution radar local DP reference system DP CONFERENCE
November 15-16, 2005
SignalProcessing
•
TargetProperties
•
DSP Hardware
•
Performance•
Summary
•
AntennaProperties
Introduction•
•Description
Antenna
RF Module
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Introdcution
Introduction RadaScan: a high resolution radar local DP reference sensor DP CONFERENCE
November 15-16, 2005
SignalProcessing
•
TargetProperties
•
DSP Hardware
•
Performance•
Summary
•
AntennaProperties
Introduction•
•Description
Antenna
RF Module
© 2
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Introdcution
Introduction RadaScan: a high resolution radar local DP reference sensor DP CONFERENCE
November 15-16, 2005
SignalProcessing
•
TargetProperties
•
DSP Hardware
•
Performance•
Summary
•
AntennaProperties
Introduction•
•Description
Antenna
RF Module
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Introduction RadaScan: a high resolution radar local DP reference sensor DP CONFERENCE
November 15-16, 2005
High accuracy
Microwave FMCW radar (patented)
Continuously rotating (180 rpm)
High elevation coverage
Coded retro-reflective transponders (patented)
Multi-target tracking
All weather operation
Close working arrangements
Clutter Rejection / No false reflections
SignalProcessing
•
TargetProperties
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DSP Hardware
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Performance•
Summary
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AntennaProperties
Introduction•
•Description
3Hz data refresh rate
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Description RadaScan: a high resolution radar local DP reference sensor DP CONFERENCE
November 15-16, 2005
Antenna
Horn
RF Module
DSPProcessing
SignalProcessing
•
TargetProperties
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DSP Hardware
•
Performance•
Summary
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AntennaProperties
Introduction•
•Description
FM Transmitter
Ramp Modulator
LNA
LNA
Hybrid T
∆
Σ
Mixer
Mixer
Target Filters
Target Filters
BaseBandAmplifiers
BaseBandAmplifiers
TX 1
TX 2
RX 1
RX 2
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Description RadaScan: a high resolution radar local DP reference sensor DP CONFERENCE
November 15-16, 2005
Transmitter
ReceiverSignal
Processing
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TargetProperties
•
DSP Hardware
•
Performance•
Summary
•
AntennaProperties
Introduction•
•Description
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Introdcution
Antenna Properties RadaScan: a high resolution radar local DP reference sensor DP CONFERENCE
November 15-16, 2005
Wide elevation beam pattern (E-plane)
Tight azimuth beam pattern (H-plane)
SignalProcessing
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TargetProperties
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DSP Hardware
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Performance•
Summary
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AntennaProperties
Introduction•
•Description
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Target Properties RadaScan: a high resolution radar local DP reference sensor DP CONFERENCE
November 15-16, 2005
True retro-reflector (no transmit energy)
TARGET
SignalProcessing
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TargetProperties
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DSP Hardware
•
Performance•
Summary
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AntennaProperties
Introduction•
•Description
No external power source required
-100
-95
-90
-85
-80
-75
-70-90 -75 -60 -45 -30 -15 0 15 30 45 60 75 90
Angle from Boresight (Degrees)
Recie
ved P
ower
(dB)
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Target Properties RadaScan: a high resolution radar local DP reference sensor DP CONFERENCE
November 15-16, 2005
Broad azimuth response for wide incidence angle
Azimuth ±45° @-3dB
Elevation ±20° @-3dB SignalProcessing
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TargetProperties
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DSP Hardware
•
Performance•
Summary
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AntennaProperties
Introduction•
•Description
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Target Properties RadaScan: a high resolution radar local DP reference sensor DP CONFERENCE
November 15-16, 2005
Broad azimuth response for wide incidence angle
Clutter rejection by modulated ID and polarization
SignalProcessing
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TargetProperties
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DSP Hardware
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Performance•
Summary
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AntennaProperties
Introduction•
•Description
Target
Angle
Range
170°
50m
170°
120°
100m
120°
500m
90°
90°
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DSP Hardware RadaScan: a high resolution radar local DP reference sensor DP CONFERENCE
November 15-16, 2005
One single highly integrated board provides:
SignalProcessing
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TargetProperties
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DSP Hardware
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Performance•
Summary
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AntennaProperties
Introduction•
•Description
4 ADC channels
1500K Gate FPGA
1.2 GFLOPS DSP processor cluster
Embedded PC
All external IO to DP system
Legend
ADC
Encoder
Target Filters
Target de-modulation
Phase sensitive detector
2- Stage Downsample
Sigma T1Delta T1Sigma T2Delta T2
Encoder Processor
DSP CLUSTER
High Speed Link PortsMarker &
Interrupts
Target Triggers
Dual Channel Target Filters
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Signal Processing RadaScan: a high resolution radar local DP reference sensor DP CONFERENCE
November 15-16, 2005
Real-time 50 MByte/s processing capability
FPGA Front End Digital Signal Processing:
Four ADC’s @ 6.25MS/STarget De-ModulationBearing ProcessorEncoder ProcessorDigital Down-conversion (down-sampling)Downstream Data Delivery
SignalProcessing
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TargetProperties
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DSP Hardware
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Performance•
Summary
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AntennaProperties
Introduction•
•Description
Range, Rfreqfrom FPGA
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Signal Processing RadaScan: a high resolution radar local DP reference sensor DP CONFERENCE
November 15-16, 2005
Down Stream Digital Signal Processing:
8192pt FFT
Bearing Process
CFAR Analysis
Range Tracker
Bearing Tracker
Bearing, φ
DetectionDecision
φ
R
HardwareControl
SignalProcessing
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TargetProperties
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DSP Hardware
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Performance•
Summary
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AntennaProperties
Introduction•
•Description
-0.2 -0.15 -0.1 -0.05 0 0.05 0.1 0.15 0.20
50
100
150
200
250
300
350
400
Range Distribution (m)
Freq
uenc
y
Normalised range measurement accuracy distribution plot for a target @ 180m, 13000 measurements
2 Sigma = 0.11m
-0.2 -0.15 -0.1 -0.05 0 0.05 0.1 0.15 0.2-0.15
-0.1
-0.05
0
0.05
0.1
0.15
Normalised x(m)
Nor
mal
ised
y(m
)
Normailised X/Y position for target @ 180m, 13000 points
data x 2 Sigma = 0.10m y 2 Sigma = 0.07m
-0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.80
50
100
150
200
250
300
Bearing Distibution (mrad)
Freq
uenc
y
Normalised bearing measurement accuracy distribution plot for a target @ 180m, 13000 measurements
2 Sigma = 0.5mrad
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Sensor Performance RadaScan: a high resolution radar local DP reference sensor DP CONFERENCE
November 15-16, 2005
Measurement Accuracy: BearingRangePosition
SignalProcessing
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TargetProperties
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DSP Hardware
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Performance•
Summary
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AntennaProperties
Introduction•
•Description
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Summary RadaScan: a high resolution radar local DP reference sensor DP CONFERENCE
November 15-16, 2005
Range Accuracy: Typically 0.1% of range.Operating Range: 20 to 750mAngular repeatability: STD 0.03° @ 200m
STD 0.06° @ 500mElevation Beam Shape: ± 12 degrees @ -10dBClose-Up Elevation: +35 degrees @ 25m.
High-accuracy all-weather radar position and heading dynamic positioning sensor
SignalProcessing
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TargetProperties
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DSP Hardware
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Performance•
Summary
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AntennaProperties
Introduction•
•Description
