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matlab

iwl = 16; %CIC滤波器输入信号的字长 owl = 32; %CIC滤波器输出信号的字长 wlps = 32; %CIC滤波器每级滤波器中每个字的比特数 decf = 4; %CIC滤波器的抽取率 diffd = 1; %CIC滤波器中的差分时延 numsecs = 3; %CIC滤波器级数 l = 2; %半带滤波器抽取因子 n = 16;
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matlab

r = 2; % 抽取因子 hm = mfilt.cicdecim(r); fs = 44.1e3; %原始的采样率 44.1kHz. n = 0:10239; % 10240个采样点 x = sin(2*pi*1e3/fs*n); %原始信号 y_fi = filter(hm,x);
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matlab

l=2; %半带滤波器的插值因子 n = 16; %半带滤波器阶数 fp = 0.0001; %半带滤波器的通带归一化频率 r=4; %CIC滤波器的插值因子 interp1=r*l; %总的插值因子 hb1 = halfinterp(n,fp,l,x); %调用子函数halfinterp进行半带滤波器的插值 x1 = CICinterp(r
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matlab

clear; load c; Fs=38400; %WCDMA信号的采样率 nsamp=16; %过采样率 delay=3; %根号下升余弦的群时延 datain=c; %这里c为WCDMA系统的扰码数据 Num=length(datain); %计算相关的长度 dataout=RRCsend(datain,Fs,nsamp,delay); %调用子程序
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matlab

len=1000; %仿真数据长度 %QPSK信号源 I_Data=randint(N,1)*2-1; Q_Data=randint(N,1)*2-1; s=I_Data + j*Q_Data; %载波信号 Freq_Sample=2400; %采样率 Delta_Freq=-60; %频偏 Time_Sample=1/Freq_Sample; %每个采样值的持续
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matlab

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matlab

len=100; %每帧的数据长度 n=3; %进行仿真的帧数 c=[1 1 1 -1 -1 1 -1]; %巴克码 for i=1:n s(i,:)=randsrc(1,len); %产生每周的信源数据 end r=[c s(1,:) c s(2,:) c s(3,:)]; %将巴克码插入信源数据中 thr=6; %判决门限，
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matlab

function dataout=RRCsend(datain,Fs,nsamp,delay); num =rcosine(Fs,Fs*nsamp,'fir/sqrt',0.22,delay); %滤波器抽头系数 dataoutr=rcosflt(real(datain),Fs,Fs*nsamp,'filter',num); dataouti=rcosflt(imag(datain),Fs
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matlab

function dataout=RRCrece(datain,Fs,nsamp,delay,carriers); num = rcosine(Fs,Fs*nsamp,'fir/sqrt',0.22,delay); %滤波器抽头系数 dataoutr=rcosflt(real(datain),Fs,Fs*nsamp,'Fs/filter',num); dataouti=rcosflt(ima
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matlab

fs = 12e6; %采样频率 ts = 1/fs; num = 2.5e6; %数据长度 SNR = -15; real_fc = 3563000; %实信号频率 data = sin(2*pi*real_fc*(0:num-1)*ts+pi/4)+sqrt(10^(SNR/10))*randn(1,num); %科斯塔斯环的输入信号 fc = 3562800; %本地频率
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