QAM.zip_QAM function_cowo9b_fort9l4_qaM MATLAB_qam

function z = my_qamdemod(y, m) %this is the function for demodulation of QAM, y is the M-QAM Modulated %signam, m is playing the same role. z is the demodulated output. input y %is a row or coulmn vector and, z should be the row vector. %santosh shah, The LNM IIT Jaipur (India)(santosh.jnt@gmail.com) 23/04/07 % again i need to check the value of M, so by the same process. if log2(sqrt(m))~= floor(log2(sqrt(m))) error('Please check the value of m that you have provided for type M-QAM.'); end %taking the reverse process k = sqrt(m); r = 2*(0:k-1) - k + 1; [xi, yi] = meshgrid(r); c = xi + j*flipud(yi); c = c(:); %now comparing the data from c's vector after rounding the input data. % Allocate space for output z = zeros(size(y)); % Slicer: Find closest constellation symbol, symbol-by-symbol. for k = 1:length(y) [nil ind] = min(abs(y(k) - c)); z(k) = ind - 1; end