Added draft to TBm_chirp model. Added init function script to testbench

chirp_block/soc_resm_init.m

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+%% Rate setup
+fs = 4096e6;
+Ts = 1/fs;
+
+%% Host Sample Time in Simulation
+TsHost = 5e-5;
+
+SamplesPerCycle = 16;
+
+FPGAClkRate = fs/SamplesPerCycle;
+TsFPGA = 1/FPGAClkRate;
+
+%% Channelizer parameters
+
+% Number of channels, maximally decimated channelizer M/D=1
+nChan = 128;
+
+% Taps per band
+nTapsPerBand = 12;
+
+% Create channelizer object
+channelizer = dsp.Channelizer('NumFrequencyBands',nChan,...
+                              'DecimationFactor',nChan,...
+                              'NumTapsPerBand',nTapsPerBand);
+% Channelizer coefficients
+channelizerCoeffs = channelizer.coeffs.Numerator;
+
+% Channel bandwidth
+chanBW = fs/nChan;
+
+% Starting frequency for each channel
+chanFStart = chanBW/2:chanBW:(fs/2-chanBW/2);
+
+% Number of frames out of channelzier
+nFrames = nChan/SamplesPerCycle;
+
+% Frame size after serializing x2
+frameSize = SamplesPerCycle/2;
+
+%% Detection parameters
+
+% Moving average window length
+movingAverageWindowLength = 64;
+
+% Moving average comparison offset
+movingAverageCompareOffset = 32;
+
+% Threshold for ratio of current moving average to offset
+thresholdScale = 500;
+thresholdScaleDT = fixdt(1,18,-6);
+thresholdScaleFi = fi(thresholdScale, thresholdScaleDT);
+
+%% Tx signal generator parameters
+
+% NCO accumulator word length
+NCOAccumWL = 16;
+
+% NCO phase increment scale factor
+NCOIncScale = Ts*2^NCOAccumWL;
+
+% NCO phase increments datatype
+NCOIncDT = numerictype(1,NCOAccumWL,0);
+
+% NCO counter increment datatype
+NCOCountIncDT = numerictype(1,NCOAccumWL*2,NCOAccumWL);
+
+%% Test signal parameters
+
+% Pulse width
+pulseWidth = 8e-6;
+
+% Pulse start/end frequencies
+pulseStartFreq = 1305e6;
+pulseEndFreqOffset = 15e6;
+
+% Number of pulses
+numPulses = 2;
+
+% Pulse repetition interval
+PRI = 50e-6;
+
+% Output gain
+pulseGenGain = 1;
+
+%% Capture parameters
+
+% Time to capture after a detection
+captureDuration = 10e-6;
+captureLength = round(captureDuration*chanBW);
+
+% Length of capture frame
+% Contains I/Q data plus channel number and two words of timestamp
+captureFrameLength = captureLength+3;
+
+% Max number of capture frames in a DMA packet
+captureFramesPerPacket = 50;
+
+% Timeout to transfer a DMA packet if number of frames less than max
+capturePacketTimeout = 1e-3;
+
+%% DMA parameters
+
+% DMA packet length
+DMAPacketLength = captureFrameLength*captureFramesPerPacket;
+DMAPacketSize = captureFrameLength*captureFramesPerPacket;
+
+% Number of DMA buffers
+DMANumBuffers = 8;
+
+% DMA FIFO depth
+DMAFIFODepth = 4096;
+
+%% Software parameters
+
+% Signal generator update rate
+TsSW = 0.25;
+
+%% Simulation parameters
+
+% Sim run time
+% stoptime = PRI*numPulses + 1e-3;
+stoptime = PRI*captureFramesPerPacket + 1e-5;