cdma.rar_CDMA RAKE_rake CDMA_rake receiver

%rake receiver fm_rec=fm_ch;%signal on the chnnels %fm_rec=fm_ch_noised; %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% [h w]=size(fm_rec); %chnnel1 cr1_abs=c_abs(:,1); cr1_abs=hor_copy(cr1_abs,Fs/Rc); cr1_ang=c_ang(:,1)+1/W; cr1_ang=hor_copy(cr1_ang,Fs/Rc); tr1=1/Fs:1/Fs:1/Rc; tr1=ver_copy(tr1,h); fm_ch1_s1=1.*cr1_abs.*cos(2*pi*Fc*t1-cr1_ang);%relayted to signal 1 fm_ch1_s2=-1.*cr1_abs.*cos(2*pi*Fc*t1-cr1_ang);%relayted to signal -1 sum_ch1_s1=fm_ch1_s1.*fm_rec; sum_ch1_s2=fm_ch1_s2.*fm_rec; sum_ch1_s1=sum(sum_ch1_s1'); sum_ch1_s2=sum(sum_ch1_s2'); %chnnel2 cr2_abs=c_abs(:,2); cr2_abs=hor_copy(cr2_abs,Fs/Rc); cr2_ang=c_ang(:,2)+2/W; cr2_ang=hor_copy(cr2_ang,Fs/Rc); tr2=1/Fs:1/Fs:1/Rc; tr2=ver_copy(tr2,h); fm_ch2_s1=1.*cr2_abs.*cos(2*pi*Fc*t1-cr2_ang);%relayted to signal 1 fm_ch2_s2=-1.*cr2_abs.*cos(2*pi*Fc*t1-cr2_ang);%relayted to signal -1 sum_ch2_s1=fm_ch2_s1.*fm_rec; sum_ch2_s2=fm_ch2_s2.*fm_rec; sum_ch2_s1=sum(sum_ch2_s1'); sum_ch2_s2=sum(sum_ch2_s2'); %chnnel3 cr3_abs=c_abs(:,3); cr3_abs=hor_copy(cr3_abs,Fs/Rc); cr3_ang=c_ang(:,3)+3/W; cr3_ang=hor_copy(cr3_ang,Fs/Rc); tr3=1/Fs:1/Fs:1/Rc; tr3=ver_copy(tr3,h); fm_ch3_s1=1.*cr3_abs.*cos(2*pi*Fc*t1-cr3_ang);%relayted to signal 1 fm_ch3_s2=-1.*cr3_abs.*cos(2*pi*Fc*t1-cr3_ang);%relayted to signal -1 sum_ch3_s1=fm_ch3_s1.*fm_rec; sum_ch3_s2=fm_ch3_s2.*fm_rec; sum_ch3_s1=sum(sum_ch3_s1'); sum_ch3_s2=sum(sum_ch3_s2'); %sum Um1=sum_ch1_s1+sum_ch2_s1+sum_ch3_s1; Um2=sum_ch1_s2+sum_ch2_s2+sum_ch3_s2; %判决 signal_recive=double(Um1>Um2); signal_trans=(x_t'+1)./2; % x_chip_recive=reshape(signal_recive,15,N); PN_mesh=hor_copy(PN',N); PN_mesh_t=hor_copy(1-PN',N); d1=sum(x_chip_recive~=PN_mesh); d2=sum(x_chip_recive~=PN_mesh_t); x_r=double(d1<d2); %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% n_bit=sum(x_r~=x); %E_bit=n_bit/N