CDMA 作业
代码说明：
fu.f..hmtmnsfngnhmk,i,yuhnhnhng t tnyntnt ht th th h fd d g sÆ° Æ° r r th ttt f sv Æ° %DS spread signal DS=kron(data,ds);%length Ns*Nc ( kron: Kronecker product, element matrices of kron(A,B) are A(i,j)B ) ---------------------------------------------- %plot first 2 symbols of ds-modulated signal if l==1 & k==1 plot([real(DS) imag(DS)]),title("2 symbols of DS modulated signal"), axis([0 2*Nc -1/sqrt(Nc) 1/sqrt(Nc)]),pause, end ------------------------------------------------- %CHANNELS %This is the place to set SNR. %Since symbol energy is 1 and noise variance is 1, %SNR of symbol/noise sample is 0 dB. %Thus, we have to multiply symbol or divide noise to obtain desired SNR.
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