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Help using randn and pskmod

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Janet
Janet 2012-3-26
I have taken random data using randn and then psk modulated it...But i get error.
M=1024;
m=4;
msg1=randn(M,1,m);
msg2=randn(M,1,m);
msg=vertcat(msg1,msg2);
% QPSK modulation
qpsk_modulated_data1=pskmod(msg1,m);
qpsk_modulated_data2=pskmod(msg2,m);
  2 个评论
Janet
Janet 2012-3-26
Error using ==> pskmod
Elements of input X must be integers in [0, M-1].

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采纳的回答

Wayne King
Wayne King 2012-3-26
You want to generate your data using randi() like this:
M = 4;
msg1 = randi([0, 3],1024,1);
qpsk_modulated_data1 = pskmod(msg1,M);
  8 个评论
显示 6更早的评论
Daniel Shub
Daniel Shub 2012-3-26
How about round(M*rand(1,m))
Janet
Janet 2012-3-26
@wayne : i get using randint

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更多回答（1 个）

Daniel Shub
Daniel Shub 2012-3-26
You realize that
randn(M,1,m)
is not going to produce integers in the range [0, m-1]? Maybe you want
doc randi

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