quantize.m

OFDM transmitter, including signal mapping for M-QAM and quantizer

function quant = quantize(data,input_range,quant_bit,number,minimum)
% do quantization
quant_level = 2^quant_bit;
step_size = input_range / quant_level;
quant = zeros(1,number);
for i = 1:number
    quant(1,i) = abs( 2*ceil( (data(i)-minimum) /step_size ) -1 )*step_size/2 + minimum;    
end