1、最正確接收機(jī)MATLAB代-CAL-FENGHAL-(YICAI)-Company One 1最正確接收機(jī) MATLAB 代碼%產(chǎn)生也新白噪聲 (normal) nt-2?andn (1? 1000) ;ifigure Cl) subplot(32i) plot <nt), Tirle C 白噪戸' > ; xlcxbel C n9 ;ylabel C x (n ');%s (t)Ts = 1;%八個(gè)碼兀時(shí)冋氏度N_sample = 10 ;個(gè)碼元內(nèi)的捕祥點(diǎn)數(shù)N = 100;鳴碼兀數(shù)dt = Ts/N_samD 丄 e:t 二 0: dt :N_sai3Lple*N

2、*dtdt;gt = ones (lj N_s imp丄e)瑪型，此為不歸零碼型da = sign(randn(lN); 鸞產(chǎn)生隨即序列n = 0:N-1;st = siAxpa nd (daA N_sample) ;%從隨機(jī)序列到基帶信號(hào) st = st (1: length (st)N_sample+L):st = CO"(Sjgl) ; 張二進(jìn)制數(shù)寧基帶信兮subplot(322)plot (t, st: (1 : length (t);axis(0 20 -1.5 1. 5);vlabelC輸入輸入雙極性NRZ波形'):subplot(322)stem(n, da);

3、axis(C0 20 -1.5 1. 5);ylabelC 輸入數(shù)字序列 'xt=n.t +st ;subplot<323)plot (t, xt), tit:"('帶噪聲信號(hào)');xlahAl (s)* );ylabel C x(t) );%y (t)hit = gt ;怖匹配濾波器中沖激響應(yīng)抽樣h2t - 5*sinc(5*(t-5)/Ts) ;%理:性低適濾波器中的沖徼響應(yīng)rlt = conv(xt, hit) :%匹配濾波器的輸出subplot(324)plot(t, 0 rlt(1:length(t)-l);axis(0 21 -1. 5 1.

4、 5);ylabelC匹配濾波器輸M ;subpl ot( 326)relda= rlt(N_samp 1 e: N_samp 1 e: encl);st:em (n, ireldcx (1 : N)* );auxis(O 20 -1. 5 1 ? 5);ylabel匹0濾波怒的扭I樣輸出)；subp丄 ot(3Z5>plot 5A ZO x*2-t C1 : lAng+h Ct) 1): axis(0 20 -1. 5 1 ? 5);3-label C 理想低適謔波輸出 ，)；re2da= r*2t( N_samplex?2 :N_saxnple : end); ±"

5、;isu_L'-e>&t&ni (n5, ir-eZda (L ; N)1);<txis(0 20 -1. 5 1? 5);ylabel C 理想低迪海液扌由樣輸出， > ；±fc urkct ion Tout-ZlAsigojcpctrid (d. ? M); N=len 打h (ci):out=zexos CMW N):out- ( 1, : ) d:out =2roshape (out，I 白噪聲1002003004005006007008009001000口噪聲的仿真波形圖帶噪聲信號(hào)的仿真波形圖匹配濾波器輸出的仿真波形圖H舞級(jí)烘而呂段刃、L罔簷1UQ05-集0-疼爛