mapper4.m

来自「Mapper for QAM 2,4 and 6 bits, taking st」· M 代码 · 共 27 行

% Function Mapping generates the Symbols from the Bit Stream for the Modulate
% stream use for input
% symbol use for output of qam

function digit = mapper4(stream)

if (mod(length(stream),4)~=0)
    pad(4-mod(length(stream),4))=0;
    stream = [stream ,pad];
end

symbol (length(stream)/4,4) = 0;
j = 1;
k = 1;
for i=1:length(stream)
    symbol(j,k)=stream(i);
    k=k+1;
    if (mod(i,4) == 0)
        k=1;
        j=j+1;
    end

end
digit = bi2de(symbol,'left-msb');
end %end of qam function