I am having a problem in converting matlab to vhdl code

I want to implement a 16 APSK modulation in hardware.I heard we could use a hdl coder tool to do this

For this,i need to write a test bench waveform too. I need help in writing the code for test bench.

Also,i heard matlab hdl coder does not work with random data function.I have the code for APSK.Please help me out for using it with fixed data.

% Radius of inner and outer circle r1 = 1; r2 = 2; mappingTable=zeros(1,16); % Define mapping table applying Gray mapping for n=0:1:5 mappingTable(n+1) = r1 * exp((1i*2*pi*n)/6); end; for m=0:1:11 mappingTable(m+7) =r2 * exp((1i*2*pi*m)/10); end if mod(numberOfBits, 4) ~= 0 error('numberOfBits must be a multiple of 4.'); end mappedSymbols = zeros(1, numberOfBits / 4); % Map bits to symbols for i = 1:4:length(x)

    symbolBits = x(i:i+3);

    symbolIndex = 2^3 * symbolBits(1) + 2^2 * symbolBits(2) + 2^1 * symbolBits(3) + 2^0 * symbolBits(4);

    % Mapping
    mappedSymbols((i - 1)/4 + 1) = mappingTable( symbolIndex +1);
end
SNRdB=20;
meanSignalPower = (r1^2 + r2^2)/2;         
SNR = 10^(SNRdB/10); % linear scale
meanNoisePower = meanSignalPower/SNR;  
receivedSignal = mappedSymbols + randn(1, length(mappedSymbols)) * sqrt(meanNoisePower/2) +...
    1i * randn(1, length(mappedSymbols)) * sqrt(meanNoisePower/2);                                            
% Decision and demapping
receivedBits = zeros(1, numberOfBits / 4);
for i = 1:length(receivedSignal)
  [mindiff,minIndex] = min(receivedSignal(i) - mappingTable);
  symbolIndex = minIndex - 1;
  bitString = dec2bin(symbolIndex, 4);
  receivedBits((i-1)*4 + 1) = str2double(bitString(1));
  receivedBits((i-1)*4 + 2) = str2double(bitString(2));
  receivedBits((i-1)*4 + 3) = str2double(bitString(3));
  receivedBits((i-1)*4 + 4) = str2double(bitString(4));
end
Error = nnz( x - receivedBits );
BER_sim=Error / numberOfBits; % bit error rate
figure(1);
plot( real(receivedSignal), imag(receivedSignal), '.'); hold on;
plot( real(mappedSymbols), imag(mappedSymbols), '.r'); hold off;
xlabel('real part');
ylabel('imaginary part');
legend('received', 'transmitted');
grid on;

Answer 1

[Kiran Kintali]

Consider reviewing the example below for best practices for MATLAB to HDL code generation.

>> mlhdlc_demo_setup('mlhdlc_fft_channelizer')