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OFDMRx.m

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function x = OFDMRx(in, sim_param)

%#codegen

% persistent hFFT;

% if isempty(hFFT)

% hFFT = dsp.FFT;

% end

% For a subframe of data

numSymb = sim_param.N_symb*2;

[~, rx] = size(in);

% N assumes 15KHz subcarrier spacing, else N = 4096

N = sim_param.N;

M=sim_param.M;

cpLen0 = sim_param.cpLen0;

cpLenR = sim_param.cpLenR;

slotLen = (N*7 + cpLen0 + cpLenR*6);

tmp = complex(zeros(N, numSymb, rx));

% Remove CP - unequal lengths over a slot

for j = 1:2 % over two slots

% First OFDM symbol

tmp(:, (j-1)*7+1, :) = in((j-1)*slotLen+cpLen0 + (1:N), :);

% Next 6 OFDM symbols

for k = 1:6

tmp(:, (j-1)*7+k+1, :) = in((j-1)*slotLen+cpLen0+k*N+k*cpLenR + (1:N), :);

end

end

% FFT processing

x = fft(tmp);

x = x./sqrt(N);