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\Communications Toolbox

CommunicationsToolbox:  /

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GENQAMMOD
( - Quadrature Amplitude Shift Keying, QASK)

:

y = genqammod(x,const)

y = genqammod(x,const)
y, x . x , 0 length(const)-1 . const. x - , .

:

. genqammod genqamdemod, [3 8 5 10 7] .

%    
inphase = [1/2 1 1 1/2 1/2 2 2 5/2];
quadr = [0 1 -1 2 -2 1 -1 0];
inphase = [inphase;-inphase]; inphase = inphase(:);
quadr = [quadr;quadr]; quadr = quadr(:);
const = inphase + j*quadr;
%   
h = scatterplot(const);
%      
x = [3 8 5 10 7];         %  
y = genqammod(x,const);
z = genqamdemod(y,const); %  
%       
hold on; scatterplot(y,1,0,'ro',h);
legend('Constellation','Modulated signal','Location','NorthWest'); %    
hold off;

: genqamdemod, qammod, qamdemod, pammod, pamdemod.

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