how does awgn works

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yasser 2014-5-25

编辑： yasser 2014-5-26

if h is normalaized to have 0dbw then after x=awgn(h,5);

1-what formula should i apply on x to see 5db;

2-is 10*log10(norm(fft(x)^2/length(x))) a coorect way for clculating power ?

3-given a signal and certain snr value what calculation should i do to make this signal have this snr ?

Thanks in advance

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