可见光通信中完整的PPM调制

用来仿真可见光通信中完整的PPM调制的功能，

%PPM调制技术
close all; 
clear all;

sumber=0; %误码率累加的初值
times=100; %求误码率的次数
  for t=1:times;
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
signal_Num=1024; %发送信号的个数
singal = zeros（1signal_Num） ; %为发送信号开辟存储空间
count_A = 0;%发送信号和接收信号相同个数初值
S_N = 0;  %误码个数的初值
singal（1:1024） = round（rand（11024））;        %产生伪随机序列（即发送信号）  
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
ppm = zeros（1289）;                 %ppm调制信号位宽288
decodeppm = zeros（1289）;           %解码后的信号位宽288
ppm_data_daly = zeros（128289）; %延时后的信号
position_decode= zeros（1128）;%PPM解调存储位置
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 
for k1 = 8:8:1024 ;%PPM调制       
  
   position1（k1） = singal（k1-7）*128 + singal（k1-6）*64 + singal（k1-5）*32 + singal（k1-4）*16 + singal（k1-3）*8 +singal（k1-2）*4 + singal（k1-1）*2 + singal（k1）*1 +1;
   %可以打开工作区中的值查看
end
    position = position1（position1 ~= 0）;  %8位调制在1-256中的某一位置，可以打开工作区中的值查看   
    
  for k5 = 1:1:128 %ppm调制的所有帧保留下来
      ppm（1:30）=[000000000000000011110000000000] ; %帧头信息17-20位上是1其他均为0
      ppm（31:（ position（k5）+31））=0; %从31位到信息位都置0
      ppm（ position（k5）+32）= 1;%信息位置1
      ppm（（ position（k5）+33）:289）= 0; %信息位之后的置0
      ppm_data1（k5:） = ppm; %调制后的信号存在ppm_data1矩阵中
  end
  %%%delay对调制后的信号进行延时%%%
delay_time = 80;%延时时间    
for i =1:128-delay_time
    ppm_data_daly（i+delay_time:） = ppm_data1（i:）;
end
for i=1:delay_time
    ppm_data_daly（i:） = ppm_data1（i+128-delay_time:）;
end
goa=[517.943287	523.8627052	514.1529329	542.2816282	530.3362154	529.0399798	514.9687343	505.6451645	510.2503082	504.95709	501.5287563	520.4613572	528.9791426	515.9445824	519.563331	500.2208329	522.7659846	510.4007484	520.9900452	532.8721589	497.4188406	527.5942596	516.1205636	510.4652708	527.9417009	514.9714637	519.3665952	516.5447053	513.3470655	508.1186798	519.2382727	509.5030725	526.0331691	535.3134194	522.4551698	533.1520781	512.1886342	513.4762893	514.5763536	526.6864208	527.5524488	515.2095901	500.9092329	512.8682131	509.9085933	512.2625004	507.248797	508.8779543	533.7903838	518.7602365	516.3743701	508.5749823	525.3916065	500.9615278	520.1561616	509.4255867	516.5235927	522.3367039	522.1849544	525.0490201	516.8541591	524.1629803	510.7484902	515.3049965	515.1648823	520.7582326	520.3773756	514.872992	527.8916723	514.6107572	521.6829119	517.7487064	517.1514216	520.7673007	509.7215764	512.7693249	517.9431018	537.2566777	505.7150553	534.3323731	524.7142236	520.8767935	518.6703005	521.3531924	515.3461293	509.7463798	514.6049667	525.6241584	516.5225145	512.1406982	514.3931608	529.2422744	529.6202518	520.0772685	517.1117834	518.2171564	526.7795163	505.3034002	525.9661036	521.9191368	515.2323932	520.9158097	520.587369	506.5816091	516.4210209	512.5957428	523.1729458	523.2065417	525.5029654	518.1018518	524.193027	530.6666454	532.1604574	511.0335806	514.2966682	507.6356213	516.2976587	521.7684137	512.4458109	507.8336468	525.9124058	525.3087059	509.6548543	520.689957

 属性            大小     日期    时间   名称
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     文件     445169  2020-01-09 22:07  PPM.m

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               445169                    1