-
Notifications
You must be signed in to change notification settings - Fork 0
/
main_RS.m
265 lines (264 loc) · 12.5 KB
/
main_RS.m
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
%% ---------Ìîäåëü MIMO and SISO RS--------
clear;clc;%close all;
%% Óïðàâëåíèå
flag_chanel = 'RAYL_SPECIAL';% 'AWGN' ,'RAYL','RIC','RAYL_SPECIAL','STATIC', 'BAD'
flag_cor_MIMO = 1; % 1-êîððåêöèÿ À×Õ (ýêâàëàéçåð äëÿ MIMO) 2-Àëàìîóòè
flag_cor_SISO = 1; % êîððåêöèÿ À×Õ (ýêâàëàéçåð äëÿ SISO)
flag_wav_MIMO = 1; % âåéâëåò øóìîïîäàâëåíèå äëÿ MIMO
flag_wav_SISO = 1; % âåéâëåò øóìîïîäàâëåíèå äëÿ SISO
flag_coder_RS = 1; % êîäåð RS âêë/âûêë
%% Ïàðàìåòðû ñèñòåìû MIMO
prm.numTx = 2; % Êîë-âî èçëó÷àþùèõ àíòåí
prm.numRx = 2; % Êîë-âî ïðèåìíûõ àíòåí
prm.numSTS = prm.numTx; % Êîë-âî ïîòîêîâ
prm.M = 16;% Ïîðÿäîê ìîäóëÿöèè
prm.bps = log2(prm.M); % Êîëü-âî áèò íà ñèìâîë â ñåêóíäó
prm.CodeRate = 1; % CONST íå ìåíÿòü. ïî óìîë÷àíèþ
prm.LEVEL = 3;% Óðîâåíü äåêîìïîçèöèè âåéâëåò øóìîïîäàâëåíèÿ min(wmaxlev(N,'db4'),floor(log2(N)))
%% Ïàðàìåòðû ñèñòåìû SISO
prm.M_siso = 16;% Ïîðÿäîê ìîäóëÿöèè
prm.bps_siso = log2(prm.M_siso); % Êîëü-âî áèò íà ñèìâîë â ñåêóíäó
prm.Nsymb_ofdm_p = 1; % Êîë-âî ïèëîòíûõ ñèìâîëîâ OFDM
%% Ïàðàìåòðû êîäåðà
M_RS = 5; % Êîë-âî áèò íà ñèìâîë , çàäàåì ïîëå Ãàëóà, ñòåïåíü ïîëèíîìà ÄÁ 3 <= M_RS <= 16.
N_RS_max = 2^M_RS-1;
K_RS = 23; % Êîë-âî ñèìâîëîâ RS ñîîáùåíèÿ ÄÁ N_RS-K_RS= 2t, ãäå t - êîë-âî èñïðàâèìûõ îøèáîê
N_RS = N_RS_max; % Êîë-âî ñèìâîëîâ RS êîäîâîãî ñëîâà ÄÁ N_RS_max>=N_RS
%% Ïàðàìåòðû OFDM
prm.numSC = 450; % Êîë-âî ïîäíåññóùèõ
prm.N_FFT = 512; % Äëèíà FFT äëÿ OFDM
prm.Nsymb_ofdm = 10; % Êîë-âî ñèìâîëîâ OFDM îò êàæäîé àíòåííû
prm.CyclicPrefixLength = 64; % äëèíà çàùèòíûõ èíòåðâàëîâ = 2*Ngi
prm.tmp_NCI = prm.N_FFT - prm.numSC;
prm.NullCarrierIndices = [1:prm.tmp_NCI/2 prm.N_FFT-prm.tmp_NCI/2+1:prm.N_FFT]'; % Guards and DC
%% Ïàðàìåòðû êàíàëà
prm.KFactor = 1;% Äëÿ 'RIC'
prm.SEED = 86;% Äëÿ 'RAYL_SPECIAL' 586 122 12
prm.SampleRate = 40e6;
dt = 1/prm.SampleRate;
switch flag_chanel
case "RAYL"
prm.tau = [2*dt 5*dt 7*dt];
prm.pdB = [-3 -9 -12];
% prm.tau = [2*dt 7*dt 15*dt];
% prm.pdB = [-3 -9 -12]
otherwise
prm.tau = 5*dt;
prm.pdB = -10;
end
%% Îáúåêòû êîäåðà Ðèäà-Ñîëîìîíà
if flag_coder_RS == 1
% Îáúåêòû êîäåðà Ðèäà-Ñîëîìîíà
if ((N_RS-K_RS)<2) || (N_RS>N_RS_max)
error('Ïðîâåðü óñëîâèÿ N_RS-K_RS > 2 and N_RS_max>N_RS');
end
rsEncoder = comm.RSEncoder('BitInput',true,'CodewordLength',N_RS,'MessageLength',K_RS);
rsEncoder_siso = clone(rsEncoder);
rsDecoder = comm.RSDecoder('BitInput',true,'CodewordLength',N_RS,'MessageLength',K_RS);
rsDecoder_siso = clone(rsDecoder);
prm.CodeRate = K_RS/N_RS;
prm.Nsymb_ofdm = N_RS;
end
%% Ðàñ÷åò
prm.n = round(prm.bps*prm.Nsymb_ofdm*prm.numSC*prm.numTx*prm.CodeRate);% Äëèíà áèíàðíîãî ïîòîêà
prm.n_pilot = prm.Nsymb_ofdm_p*prm.numSC; % Êîë-âî áèò íà ïèëîòû SISO
prm.n_siso = round(prm.bps_siso*prm.Nsymb_ofdm*prm.numSC*prm.CodeRate);% Äëèíà áèíàðíîãî ïîòîêà
%% ---------Ñàì ñêðèïò--------
if flag_cor_MIMO == 2
ostbcEnc = comm.OSTBCEncoder('NumTransmitAntennas',prm.numTx);
ostbcComb = comm.OSTBCCombiner('NumReceiveAntennas',prm.numRx);
prm.n = prm.n/prm.numTx;
end
SNR_MAX = 100;
SNR = 0+floor(10*log10(prm.bps)):SNR_MAX+floor(10*log10(prm.bps*prm.numTx));
prm.MinNumErr = 100; % Ïîðîã îøèáîê äëÿ öèêëà
prm.conf_level = 0.95; % Óðîâåíü äîñòîâåðíîñòè
prm.MAX_indLoop = 1;% Ìàêñèìàëüíîå ÷èñëî èòåðàöèé â öèêëå while
prm.MaxNumZero = 4; % max êîë-âî íóëåâûõ òî÷åê â öèêëå while
Koeff = 1/15;%Êîë-âî ïðîöåíòîâ îò BER 7%
Exp = 1;% Êîë-âî îïûòîâ
for indExp = 1:Exp
%% Ñîçäàíèå êàíàëà
[H,H_siso] = create_chanel(flag_chanel,prm);
NumZero = 0; % êîë-âî íóëåâûõ òî÷åê
for indSNR = 1:length(SNR)
berconf_M = 0;
berconf_S = 0;
ErrNum_M = 0; % êîë-âî îøèáîê MIMO
ErrNum_S = 0; % êîë-âî îøèáîê MIMO
indLoop = 0; % èíäèêàòîð èòåðàöèé öèêëà while
LenIntLoop_S = 100;
LenIntLoop_M = 100;
condition_M = ((LenIntLoop_M > berconf_M*Koeff)||(ErrNum_M < prm.MinNumErr));
condition_S = ((LenIntLoop_S > berconf_S*Koeff)||(ErrNum_S < prm.MinNumErr));
if (NumZero >= prm.MaxNumZero)
break;
end
while (condition_M || condition_S) && (indLoop < prm.MAX_indLoop)
%% Ôîðìèðóåì äàííûå
if flag_coder_RS == 1
Inp_data = randi([0 1],prm.n,1); % Ïåðåäàâàåìûå äàííûå
EncData = rsEncoder(Inp_data); % Êîäåð RS
IntrData= randintrlv(EncData,prm.SEED); %Ïåðåìåæèòåëü
else
Inp_data = randi([0 1],prm.n,1); % Ïåðåäàâàåìûå äàííûå
IntrData = Inp_data;
end
Inp_Mat = reshape(IntrData,length(IntrData)/prm.bps,prm.bps); %Ãðóïïèðóåì áèòû
Inp_Sym = bi2de(Inp_Mat); % Âõîäíûå äàííûå â ñèìâîëàõ
% SISO
if flag_coder_RS == 1
Inp_data_siso = randi([0 1],prm.n_siso,1); % Ïåðåäàâàåìûå äàííûå
EncData_siso = rsEncoder_siso(Inp_data_siso); % Êîäåð RS
IntrData_siso = randintrlv(EncData_siso,prm.SEED); %Ïåðåìåæèòåëü
else
Inp_data_siso = randi([0 1],prm.n_siso,1); % Ïåðåäàâàåìûå äàííûå
IntrData_siso = Inp_data_siso;
end
Inp_Mat_siso = reshape(IntrData_siso,length(IntrData_siso)/prm.bps_siso,prm.bps_siso); %Ãðóïïèðóåì áèòû
Inp_Sym_siso = bi2de(Inp_Mat_siso); % Âõîäíûå äàííûå â ñèìâîëàõ
% Ôîðìèðóåì ïèëîòû äëÿ SISO
Inp_data_pilot = randi([0 1],prm.n_pilot,1);% íàáîð ïèëîòîâ â áèòàõ
%% Ìîäóëÿòîð
% MIMO
Mod_data_inp_tmp = qammod(Inp_Sym,prm.M);% Ìîäóëÿòîð QAM-M äëÿ ïîëåçíîé èíô
if flag_cor_MIMO == 2
Mod_data_inp_tmp = ostbcEnc(Mod_data_inp_tmp);
end
Mod_data_inp = reshape(Mod_data_inp_tmp,prm.numSC,prm.Nsymb_ofdm,prm.numTx);
% Ìîäóëÿòîð ïèëîòîâ MIMO
[preambula,ltfSC] = My_helperGenPreamble(prm);
% Ìîäóëÿòîð ïèëîòîâ SISO
Mod_data_inp_pilot = pskmod(Inp_data_pilot,2);
% SISO
Mod_data_inp_tmp_siso = qammod(Inp_Sym_siso,prm.M_siso);% Ìîäóëÿòîð QAM-M äëÿ ïîëåçíîé èíô
Mod_data_inp_tmp_siso1 = cat(1,Mod_data_inp_pilot,Mod_data_inp_tmp_siso );
Mod_data_inp_siso = reshape(Mod_data_inp_tmp_siso1,prm.numSC,prm.Nsymb_ofdm+prm.Nsymb_ofdm_p,1);
%% Ìîäóëÿòîð OFDM
OFDM_data = ofdmmod(Mod_data_inp,prm.N_FFT,prm.CyclicPrefixLength,...
prm.NullCarrierIndices);
OFDM_data_siso = ofdmmod(Mod_data_inp_siso,prm.N_FFT,prm.CyclicPrefixLength,...
prm.NullCarrierIndices);
OFDM_data = [preambula ; OFDM_data];
%% Ïðîõîæäåíèå êàíàëà
switch flag_chanel
case {'RAYL','RIC','RAYL_SPECIAL'}
% H.Visualization = 'Impulse and frequency responses';
% H.AntennaPairsToDisplay = [2,2];
% H_siso.Visualization = 'Impulse and frequency responses';
[Chanel_data, H_ist] = H(OFDM_data);
[Chanel_data_siso, H_ist_siso] = H_siso(OFDM_data_siso);
otherwise
Chanel_data = OFDM_data*H;
Chanel_data_siso = OFDM_data_siso*H_siso;
end
%% Ñîáñòâåííûé øóì
[Noise_data,sigma] = my_awgn(Chanel_data,SNR(indSNR));%SNR(indSNR)
[Noise_data_siso,sigma_siso] = my_awgn(Chanel_data_siso,SNR(indSNR));%SNR(indSNR)
%% Äåìîäóëÿòîð OFDM
Mod_data_out = ofdmdemod(Noise_data,prm.N_FFT,prm.CyclicPrefixLength,prm.CyclicPrefixLength, ...
prm.NullCarrierIndices);
Mod_data_out_siso = ofdmdemod(Noise_data_siso,prm.N_FFT,prm.CyclicPrefixLength,prm.CyclicPrefixLength, ...
prm.NullCarrierIndices);
%% Îöåíêà êàíàëà
H_estim = My_helperMIMOChannelEstimate(Mod_data_out(:,1:prm.numSTS,:),ltfSC,prm);
H_estim_siso = Mod_data_out_siso(:,1)./Mod_data_inp_pilot;
Mod_data_out_siso(:,1:prm.Nsymb_ofdm_p) = [];
%% Âåéâëåò øóìîïîäàâëåíèå
if flag_wav_SISO == 1
H_estim_siso = H_WAV_my(H_estim_siso,prm.LEVEL);
end
if flag_wav_MIMO == 1
H_estim = H_WAV_my_mimo(H_estim,prm.LEVEL);
end
%% Ýêâàëàéçåð
%ZF MIMO
if flag_cor_MIMO == 1
Mod_data_out_ZF_tmp= My_MIMO_Equalize_ZF_numSC(Mod_data_out(:,prm.numTx+1:end,:),H_estim);
Mod_data_out_ZF = reshape(Mod_data_out_ZF_tmp,prm.numSC*prm.Nsymb_ofdm,prm.numRx);
elseif flag_cor_MIMO == 2
Mod_data_out_ZF_tmp = Mod_data_out(:,prm.numTx+1:end,:);
for i = 1:prm.Nsymb_ofdm
Mod_data_out_ZF(:,i) = ostbcComb(squeeze(Mod_data_out_ZF_tmp(:,i,:)),H_estim);
end
else
Mod_data_out_ZF_tmp = Mod_data_out(:,prm.numTx+1:end,:);
Mod_data_out_ZF = reshape(Mod_data_out_ZF_tmp,prm.numSC*prm.Nsymb_ofdm,prm.numRx);
end
%ZF SISO
if flag_cor_SISO == 1
for i = 1:size(Mod_data_out_siso,2)
Mod_data_out_siso_ZF(:,i) = Mod_data_out_siso(:,i)./H_estim_siso;
end
else
Mod_data_out_siso_ZF = Mod_data_out_siso;
end
%% Äåìîäóëÿòîð
Mod_data_out_tmp = Mod_data_out_ZF(:);
Out_Sym = qamdemod(Mod_data_out_tmp,prm.M);
Mod_data_out_siso_tmp = Mod_data_out_siso_ZF(:);
Out_Sym_siso = qamdemod(Mod_data_out_siso_tmp,prm.M_siso);
%% Âûõîäíûå äàííûå
Out_Mat = de2bi(Out_Sym);
Out_data = Out_Mat(:);
if(flag_coder_RS == 1)
DeintData = randdeintrlv(Out_data,prm.SEED);
Out_data = rsDecoder(DeintData); % Äåêîäåð RS
end
Out_Mat_siso = de2bi(Out_Sym_siso);
Out_data_siso = Out_Mat_siso(:);
if(flag_coder_RS == 1)
DeintData_siso = randdeintrlv(Out_data_siso,prm.SEED);
Out_data_siso = rsDecoder_siso(DeintData_siso); % Äåêîäåð RS
end
ErrNum_M = ErrNum_M+sum(abs(Out_data-Inp_data));
ErrNum_S = ErrNum_S+sum(abs(Out_data_siso-Inp_data_siso));
%%
indLoop = indLoop+1;
[berconf_M,conf_int_M] = berconfint(ErrNum_M,indLoop*length(Inp_data),prm.conf_level);
[berconf_S,conf_int_S] = berconfint(ErrNum_S,indLoop*length(Inp_data_siso),prm.conf_level);
LenIntLoop_M = conf_int_M(2)-conf_int_M(1);
LenIntLoop_S = conf_int_S(2)-conf_int_S(1);
condition_M = ((LenIntLoop_M > berconf_M/15)||(ErrNum_M < prm.MinNumErr));
condition_S = ((LenIntLoop_S > berconf_S/15)||(ErrNum_S < prm.MinNumErr));
end
if (ErrNum_M == 0)&&(ErrNum_S==0)
NumZero = NumZero+1;
end
ber(indExp,indSNR) = berconf_M;
ber_siso(indExp,indSNR) = berconf_S;
% ber1(indExp,indSNR) = ErrNum_M/(indLoop*length(Inp_data));
% ber_siso1(indExp,indSNR) = ErrNum_S/(indLoop*length(Inp_data_siso));
if ErrNum_M>ErrNum_S
ErrNum_disp = ErrNum_S;
name = 'Er_SISO';
else
ErrNum_disp = ErrNum_M;
name = 'Er_MIMO';
end
fprintf(['Complete %d db ' name ' = %d, ind = %d NZ = %d\n'],...
SNR(indSNR),ErrNum_disp,indLoop,NumZero);
end
fprintf('Exp %d \n',indExp);
end
if flag_cor_MIMO ~= 2
prm.bps = prm.bps*prm.numTx;
end
ber_mean = mean(ber,1);
ber_siso_mean = mean(ber_siso,1);
SNR = SNR(1:max(size(ber_siso_mean,2),size(ber_mean,2)));
Eb_N0_M = SNR-(10*log10(prm.bps));
Eb_N0_S = SNR-(10*log10(prm.bps_siso));
Eb_N0 = 0:60;
ther_ber_1 = berfading(Eb_N0,'qam',4,1);
% ther_ber_1 = berawgn(Eb_N0,'qam',128);
figure()
plot_ber(ther_ber_1,Eb_N0,1,'g',1.5,0)
plot_ber(ber_mean,SNR(1:size(ber_mean,2)),prm.bps,'k',1.5,0)
plot_ber(ber_siso_mean,SNR(1:size(ber_siso_mean,2)),prm.bps_siso,'b',1.5,0)
legend('Òåîðåòè÷åñêàÿ qam 4',['MIMO' num2str(prm.M)],...
['SISO' num2str(prm.M_siso)])%,"Òåîðåòè÷åñêàÿ order = 4")
str = ['DataBase/CR=' num2str(K_RS) '_' num2str(N_RS) '_corM=' num2str(flag_cor_MIMO) '_' num2str(prm.numTx) 'x' num2str(prm.numRx) '_' flag_chanel '_Wm=' num2str(flag_wav_MIMO)...
'_Ws=' num2str(flag_wav_SISO) '_Mm=' num2str(prm.M)...
'_Ms=' num2str(prm.M_siso) '_Exp=' num2str(Exp) '.mat'];
% save(str,'ber_mean','ber_siso_mean','SNR','prm','ber','ber_siso','M_RS','K_RS','N_RS')