html5 图片展示网站,做马甲的网站,昆明网站建设哪家最好,柳州网站seo1、条件#xff1a;
输入数字信号#xff0c;可以随机产生#xff0c;也可手动输入
2、要求#xff1a;
#xff08;1#xff09;能显示编码树、网格图或状态转移图三者之一#xff1b;
#xff08;2#xff09;根据输入数字信号编码生成卷积码并显示#xf…1、条件
输入数字信号可以随机产生也可手动输入
2、要求
1能显示编码树、网格图或状态转移图三者之一
2根据输入数字信号编码生成卷积码并显示
3在信号传输加引入误码
4在纠错范围内能进行纠错译码并显示比较。 编码原理
将卷积码记作(n,k,N)。一般来说卷积码的k和n是比较小的整数。
码率仍定义为k/n。卷积码是一种非分组码(分组码经过编码生成的码组可以分为信息位和校验位卷积码编码生成的码整体看作校验码或者说监督码)。另外分组码的k和n均代表码元个数每个码元可能有m个比特的信息而卷积码的n和k均指比特(分组码可以看作帧/矢量编码卷积码可以看作数据流编码)。卷积码是将k个比特的信息段编成n个比特的码组其编码生成的监督码元不止和k个比特的信息段有关还和前面的m(N-1)个信息段有关。可知一个监督码元同时和前m个比特以及当前输入的一个比特信息有关即监督着Nm1个比特我们将N成为约束度所有监督码元的长度nN称为约束长度。
综上k即为卷积码的输入路数(多路输入要进行串并转换)n为输出比特个数m为移位寄存器的位数(用于保存所需的前几个比特)Nm1。 译码原理
将卷积码记作(n,k,N)。一般来说卷积码的k和n是比较小的整数。u
码率仍定义为k/n。卷积码是一种非分组码(分组码经过编码生成的码组可以分为信息位和校验位卷积码编码生成的码整体看作校验码或者说监督码)。另外分组码的k和n均代表码元个数每个码元可能有m个比特的信息而卷积码的n和k均指比特(分组码可以看作帧/矢量编码卷积码可以看作数据流编码)。卷积码是将k个比特的信息段编成n个比特的码组其编码生成的监督码元不止和k个比特的信息段有关还和前面的m(N-1)个信息段有关。可知一个监督码元同时和前m个比特以及当前输入的一个比特信息有关即监督着Nm1个比特我们将N成为约束度所有监督码元的长度nN称为约束长度。
综上k即为卷积码的输入路数(多路输入要进行串并转换)n为输出比特个数m为移位寄存器的位数(用于保存所需的前几个比特)Nm1。 设计方案 PPT图源刘银杰 运行结果 图源刘银杰 图源刘银杰 转移图 误码纠错 完整代码
%王科文/姚双/刘银杰/杨昊 重庆工商大学
function main3
% LabName: 卷积编解码实验
% Task: 生成数据长度为10的比特数据源
% 约束长度为7生成多项式进行1/2卷积编码
% 解码可用Matlab自带函数vitdec进行译码
% 统计译码比特和数据源的误码数
close all
% 创建主窗口
fig figure(Name, 卷积编解码实验, NumberTitle, off, Position, [50, 380, 700, 400]);
% 设置采样率和码元速率
fs 30720000; % 采样率
Rb 153600; % 码元速率% 生成数据源
dataBit [];
code_data_s [];
decode_data_s [];
errorNum [];
zhuangtai[];
% 创建按钮和文本框
uicontrol(Style,text,Position,[10,350,330,30],String,①(指定错误)输入引入错误的位置,FontSize,14)
uicontrol(Style,text,Position,[340,350,330,30],String,②(随机错误)输入随机错误的个数,FontSize,14)
uicontrol(Style,text,Position,[230,260,200,30],String,随机10位数据源显示,FontSize,14)
uicontrol(Style,text,Position,[230,200,200,30],String,手动10位数据源输入,FontSize,14)
uicontrol(Style,text,Position,[230,140,200,30],String,10位卷积码译码显示,FontSize,14)
uicontrol(Style,text,Position,[20,50,180,30],String,对应32位编码显示:,FontSize,14)
uicontrol(Style,text,Position,[230,90,200,30],String,纠错位置显示,FontSize,14)
%dataBit11uicontrol(Style, edit, String, , Position, [400, 160, 200, 30]);%随机显示文本框
duicontrol(Style, edit, String, , Position, [450, 140, 200, 30]);
euicontrol(Style, edit, String, , Position, [450, 90, 200, 30]);
auicontrol(Style, edit, String, , Position, [450, 200, 200, 90], Callback, (src, event) updateManualInput(src, event));%手动输入文本框
buicontrol(Style, edit, String, 2(输入格式), Position, [400, 320, 200, 30],Callback, (src, event) updateManualInput2(src, event));%输入错误个数文本框
cuicontrol(Style, edit, String, 1 2 5(输入格式·), Position, [60, 320, 200, 30],Callback,(src, event) updateManualInput1(src, event));%输入错误位置文本框
codeuicontrol(Style, edit, String, , Position, [200, 50, 450, 30]);%编码显示文本框
uicontrol(Style, pushbutton, String, 随机生成数据源, Position, [60, 260, 150, 30], Callback, (src, event) generateRandomData(src, event,a,d,e, code,fs, Rb));
uicontrol(Style, pushbutton, String, 手动输入数据源, Position, [60, 200, 150, 30], Callback, (src, event) manualInputData(src, event,d,e,code, fs, Rb));
uicontrol(Style, pushbutton, String, 本(2,1,7)卷积码状态转移显示, Position, [400, 10, 200, 30], Callback, (src, event) bianma());
set(fig,UserData,struct(a,a,b,b,c,c));function bianma()figure(Name, 卷积编码规则, NumberTitle, off, Position, [750, 100, 800, 580]);A1[0.05,0.7];B1[0.95,0.7];annotation(arrow,[A1(1),B1(1)],[A1(2),B1(2)]);zhuangtai1uicontrol(Style, edit, String, , Position, [180, 515, 200, 35],Callback, (src, event) updateManualInput3(src, event));uicontrol(Style,text,Position,[25,350,700,30],String,输入位A M1 M2 M3 M4 M5 M6,FontSize,14)uicontrol(Style,text,Position,[20,220,550,30],String,217卷积码第一位输出编码(AM1M2M3M6)(模2加),FontSize,14)uicontrol(Style,text,Position,[20,160,550,30],String,217卷积码第二位输出编码(AM2M3M5M6)(模2加),FontSize,14)uicontrol(Style,text,Position,[10,100,500,30],String,寄存器(M1 M2 M3 M4 M5 M6)目前状态为:,FontSize,14)uicontrol(Style,text,Position,[10,40,500,30],String,寄存器(M1 M2 M3 M4 M5 M6)下一状态为:,FontSize,14)shuruuicontrol(Style, edit, String, 0, Position, [60, 300, 50, 30]);M1uicontrol(Style, edit, String, 0, Position, [160, 300, 50, 30]);M2uicontrol(Style, edit, String, 0, Position, [260, 300, 50, 30]);M3uicontrol(Style, edit, String, 0, Position, [360, 300, 50, 30]);M4uicontrol(Style, edit, String, 0, Position, [460, 300, 50, 30]);M5uicontrol(Style, edit, String, 0, Position, [560, 300, 50, 30]);M6uicontrol(Style, edit, String, 0, Position, [660, 300, 50, 30]);now1uicontrol(Style, edit, String, 0, Position, [450, 100, 200, 30]);next1uicontrol(Style, edit, String, 0, Position, [450, 40, 200, 30]);bianma1uicontrol(Style, edit, String, , Position, [600, 220, 50, 40]);bianma2uicontrol(Style, edit, String, , Position, [600, 160, 50, 40]);uicontrol(Style, pushbutton, String, 填入状态, Position, [50, 515, 100, 35], Callback, {subButtonCallback, zhuangtai1,shuru, ...M1,M2,M3,M4,M5,M6,now1,bianma1,bianma2,next1});uicontrol(Style, pushbutton, String, 输入1, Position, [50, 450, 100, 30], Callback, {shu1, shuru,M1,M2,M3,M4,M5,M6,now1,bianma1,bianma2,next1})uicontrol(Style, pushbutton, String, 输入0, Position, [210, 450, 100, 30], Callback, {shu0, shuru,M1,M2,M3,M4,M5,M6,now1,bianma1,bianma2,next1})
end
function shu1(~,~,shuru,M1,M2,M3,M4,M5,M6,now1,bianma1,bianma2,next1)M61get(M5,String);M51get(M4,String);M41get(M3,String);M31get(M2,String);M21get(M1,String);M11get(shuru,String);now[M11,M21,M31 ,M41,M51,M61];set(now1,String,now)set(shuru,String,num2str(1))set(M1,String,num2str(M11))set(M2,String,num2str(M21))set(M3,String,num2str(M31))set(M4,String,num2str(M41))set(M5,String,num2str(M51))set(M6,String,num2str(M61))f1xor(1,xor(str2num(M11),xor(str2num(M21),xor(str2num(M31),str2num(M61)))));f2xor(1,xor(str2num(M21),xor(str2num(M31),xor(str2num(M51),str2num(M61)))));set(bianma1,String,num2str(f1))set(bianma2,String,num2str(f2))M611get(M5,String);M511get(M4,String);M411get(M3,String);M311get(M2,String);M211get(M1,String);M111get(shuru,String);next[M111,M211,M311 ,M411,M511,M611];set(next1,String,next)
end
function shu0(~,~,shuru,M1,M2,M3,M4,M5,M6,now1,bianma1,bianma2,next1)M61get(M5,String);M51get(M4,String);M41get(M3,String);M31get(M2,String);M21get(M1,String);M11get(shuru,String);now[M11,M21,M31 ,M41,M51,M61];set(now1,String,now)set(shuru,String,num2str(0))set(M1,String,num2str(M11))set(M2,String,num2str(M21))set(M3,String,num2str(M31))set(M4,String,num2str(M41))set(M5,String,num2str(M51))set(M6,String,num2str(M61))f1xor(0,xor(str2num(M11),xor(str2num(M21),xor(str2num(M31),str2num(M61)))));f2xor(0,xor(str2num(M21),xor(str2num(M31),xor(str2num(M51),str2num(M61)))));set(bianma1,String,num2str(f1))set(bianma2,String,num2str(f2))M611get(M5,String);M511get(M4,String);M411get(M3,String);M311get(M2,String);M211get(M1,String);M111get(shuru,String);next[M111,M211,M311,M411,M511,M611];set(next1,String,next)
end
function subButtonCallback(~, ~, zhuangtai1,shuru,M1,M2,M3,M4,M5,M6,now1,bianma1,bianma2,next1)% 读取子窗口文本框的内容zhuangtaiget(zhuangtai1,String);f1xor(str2num(zhuangtai(1)),xor(str2num(zhuangtai(3)),xor(str2num(zhuangtai(5)),xor(str2num(zhuangtai(7)),str2num(zhuangtai(13))))));f2xor(str2num(zhuangtai(1)),xor(str2num(zhuangtai(5)),xor(str2num(zhuangtai(7)),xor(str2num(zhuangtai(11)),str2num(zhuangtai(13))))));set(bianma1,String,num2str(f1))set(bianma2,String,num2str(f2))% 将内容填充到另一个文本框中set(shuru,String,num2str(zhuangtai(1)))set(M1,String,num2str(zhuangtai(3)))set(M2,String,num2str(zhuangtai(5)))set(M3,String,num2str(zhuangtai(7)))set(M4,String,num2str(zhuangtai(9)))set(M5,String,num2str(zhuangtai(11)))set(M6,String,num2str(zhuangtai(13)))now[zhuangtai(3),zhuangtai(5),zhuangtai(7),zhuangtai(9),zhuangtai(11),zhuangtai(13)];set(now1,String,now)next[zhuangtai(1),zhuangtai(3),zhuangtai(5),zhuangtai(7),zhuangtai(9),zhuangtai(11)];set(next1,String,next)
end
% 回调函数随机生成数据源、编码和解码
function generateRandomData(~, ~,a,d,e,code,fs, Rb)dataget(gcf,UserData);inputString1 get(data.b, String);errorsstr2num(inputString1);inputString2 get(data.c, String);errors11str2num(inputString2);len_in 10; % 数据源长度dataBit randi([0,1], 1, len_in);set(a,String,num2str(dataBit))processData(dataBit,code,d,e,errors,errors11,fs, Rb);
end
% 回调函数手动输入数据源
function manualInputData(~, ~,d,e, code,fs, Rb)dataget(gcf,UserData);inputString get(data.a, String);dataBit str2num(inputString);if isempty(dataBit) || ~all(ismember(dataBit, [0, 1]))||length(inputString)~19% 非法输入清空文本框msgbox(请输入有效的10位二进制数据0和1每个数据用一个空格隔开, 错误, error);endinputString1 get(data.b, String);errorsstr2num(inputString1); %#ok*ST2NM inputString2 get(data.c, String);errors11str2num(inputString2);processData(dataBit, code,d,e,errors,errors11,fs, Rb);
end
% 更新手动输入文本框数据源
function updateManualInput(src, ~)inputString get(src, String);inputArray str2num(inputString);if isempty(inputArray) || ~all(ismember(inputArray, [0, 1]))||length(inputString)~19% 非法输入清空文本框set(src, String, );end
end
%引入错误位置
function updateManualInput1(src, ~)inputString get(src, String);inputArray str2num(inputString);shun0:32;if ~all(ismember(inputArray, shun))% 非法输入清空文本框msgbox(请输入元素为0到32的数组每个数据用一个空格隔开, 错误, error);set(src, String, );end
end
%输入错误个数
function updateManualInput2(src, ~)inputString get(src, String);inputArray str2num(inputString);shun0:32;if ~all(ismember(inputArray, shun))||length(inputArray)~1% 非法输入清空文本框msgbox(请输入一个0到32的数, 错误, error);set(src, String, );end
end
% 处理数据
function updateManualInput3(src, ~)inputString get(src, String);inputArray str2num(inputString);if isempty(inputArray) || ~all(ismember(inputArray, [0, 1]))||length(inputString)~13% 非法输入清空文本框msgbox(请输入有效的7位二进制数据0和1,每个数据用一个空格隔开, 错误, error);set(src, String, );end
end
function processData(dataBit, code,d,e,errors,errors11,fs, Rb)K 7; % 约束度CodeGenerator [171, 133]; % 171 为8进制对应为1 1 1 1 0 0 1 133为1 0 1 1 0 1 1len_in length(dataBit);len_out (len_in K - 1) * 2;sample_num fs / Rb; % 1个码元采样点数N len_in * sample_num; % 总样点数dt 1 / fs;t 0:dt:(N - 1) * dt;N1 len_out * sample_num;t1 0:dt:(N1 - 1) * dt;% 数据源进行卷积编码reg zeros(1, 6);sourceBit [dataBit, zeros(1, 6)];% 加6个尾比特len length(sourceBit);first zeros(1, len);second zeros(1, len);code_data zeros(1, 2 * len); %#ok*PREALL for n 1:lenfirst(n) xor(xor(xor(xor(sourceBit(n), reg(1)), reg(2)), reg(3)), reg(6));second(n) xor(xor(xor(xor(sourceBit(n), reg(2)), reg(3)), reg(5)), reg(6));reg(6) reg(5);reg(5) reg(4);reg(4) reg(3);reg(3) reg(2);reg(2) reg(1);reg(1) sourceBit(n);code_data1(1, (n - 1) * 2 1 : 2 * n) [first(n), second(n)];endcode_data1(1,(n-1)*21:2*n)[first(n),second(n)];set(code,String,num2str(code_data1))code_datacode_data1;if errors~0errors1randperm(32);worrys[];for n1:errorsworryerrors1(n);worrys(n)worry;code_data1(1,worry)~code_data1(1,worry);endelseworrys[];for n1:length(errors11)worryerrors11(n);worrys(n)worry;code_data1(1,worry)~code_data1(1,worry);endendTch_co_datacode_data1;%% 卷积解码len1length(Tch_co_data);trellis poly2trellis(K, CodeGenerator);decode_data vitdec(Tch_co_data, trellis, len1/2,trunc,hard);%维特比译码decodeBitdecode_data(1,1:length(decode_data)-6);set(d,String,num2str(decodeBit))%% 统计误码数errorNumsum(xor(dataBit,decodeBit));i1;box[];if errorNum0for n1:32differentxor(code_data(1,n),code_data1(1,n));if different1box(i)n;ii1;endendif length(box)~0msgbox([检查出第,num2str(box),位出现错误并成功纠错]);set(e,String,num2str(box))elseset(e,String,未引入错误)endelsemsgbox(纠错失败可能是错误位数过多或出错位置过于密集请重试,警告)set(e,String,纠错失败)end%% 过采样source_data_szeros(1,len_in*sample_num);code_data_szeros(1,len_out*sample_num);code_data_s1zeros(1,len_out*sample_num);decode_data_szeros(1,len_in*sample_num);for n1:len_insource_data_s(1,(n-1)*sample_num1:n*sample_num)dataBit(1,n);decode_data_s(1,(n-1)*sample_num1:n*sample_num)decodeBit(1,n);endfor n1:len_outcode_data_s(1,(n-1)*sample_num1:n*sample_num)code_data(1,n);%正常编码code_data_s1(1,(n-1)*sample_num1:n*sample_num)code_data1(1,n);%错误编码end%% 打印波形figure(Name,2,NumberTitle, off, Position, [50, 40, 700, 350])subplot(411)plot(t,source_data_s);xlabel(时间(s));ylabel(幅值(v));ylim([-1,2]);title(数据源)subplot(412)plot(t1,code_data_s);xlabel(时间(s));ylabel(幅值(v));ylim([-0.2,1.2]);title(卷积码编码后数据)subplot(413)plot(t1,code_data_s1);xlabel(时间(s));ylabel(幅值(v));ylim([-0.2,1.2]);title(卷积码编码出错数据)subplot(414)plot(t,decode_data_s);xlabel(时间(s));ylabel(幅值(v));ylim([-1,2]);title(卷积码解码数据)
end
end
