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get_DB_LDPC.m
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get_DB_LDPC.m
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function get_DB_LDPC(MOD_M,MOD_S,wav_MIMO,wav_SISO,cor_MIMO,snr,exp,indloop,CR)
%% Óïðàâëåíèå
flag_chanel = 'RAYL'; % 'AWGN' ,'RAYL','RIC','RAYL_SPECIAL','STATIC', 'BAD'
flag_cor_MIMO = cor_MIMO; % 1-êîððåêöèÿ À×Õ (ýêâàëàéçåð äëÿ MIMO) 2-Àëàìîóòè
flag_cor_SISO = 1; % êîððåêöèÿ À×Õ (ýêâàëàéçåð äëÿ SISO)
flag_wav_MIMO = wav_MIMO; % âåéâëåò øóìîïîäàâëåíèå äëÿ MIMO
flag_wav_SISO = wav_SISO; % âåéâëåò øóìîïîäàâëåíèå äëÿ SISO
flag_coder_LDPC = 1; % êîäåð LDPC 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 = MOD_M;% 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 = MOD_S;% 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
codeRate = CR; % 1/4, 1/3, 2/5, 1/2, 3/5, 2/3, 3/4, 4/5, 5/6, 8/9, or 9/10
CODEWORD_LENGTH = 64800;
N_CodeWord = 2; % Êîë-âî êîäîâûõ ñëîâ
ofdm_symb = 36; % ÄÁ n = 64800;
%% Ïàðàìåòðû OFDM
prm.numSC = 450; % Êîë-âî ïîäíåññóùèõ
prm.N_FFT = 512; % Äëèíà FFT äëÿ OFDM
prm.Nsymb_ofdm = 100; % 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 = 122;% 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
%%
if flag_cor_MIMO == 2
ostbcEnc = comm.OSTBCEncoder('NumTransmitAntennas',prm.numTx);
ostbcComb = comm.OSTBCCombiner('NumReceiveAntennas',prm.numRx);
numTx = 1;
else
numTx = prm.numTx;
end
if flag_coder_LDPC == 1
%% Îáúåêòû êîäåðà LDPC
LDPCParityCheckMatrix = dvbs2ldpc(codeRate);
ldpcEnc = comm.LDPCEncoder(LDPCParityCheckMatrix);
ldpcDec = comm.LDPCDecoder(LDPCParityCheckMatrix);
prm.Nsymb_ofdm = ofdm_symb;
prm.CodeRate = codeRate;
Nsymb_ofdm_mimo = ofdm_symb/numTx;
prm.Nsymb_ofdm = ofdm_symb;
expfactbps = prm.bps/prm.bps_siso;
Nsymb_ofdm_siso = ofdm_symb*expfactbps;
else
Nsymb_ofdm_mimo = prm.Nsymb_ofdm;
Nsymb_ofdm_siso = prm.Nsymb_ofdm;
N_CodeWord = 1;
end
%% Ðàñ÷åò
prm.n = prm.bps*Nsymb_ofdm_mimo*prm.numSC*numTx*prm.CodeRate;% Äëèíà áèíàðíîãî ïîòîêà
prm.n_pilot = prm.Nsymb_ofdm_p*prm.numSC; % Êîë-âî áèò íà ïèëîòû SISO
prm.n_siso = prm.bps_siso*Nsymb_ofdm_siso*prm.numSC*prm.CodeRate;% Äëèíà áèíàðíîãî ïîòîêà
%% ---------Ñàì ñêðèïò--------
SNR_MAX = snr;
SNR = 0+floor(10*log10(prm.bps)):SNR_MAX+floor(10*log10(prm.bps*prm.numTx));
% SNR = [floor(10*log10(prm.bps)):9 9.2:0.2:SNR_MAX SNR_MAX+1: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 = indloop;% 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 = exp;% 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_LDPC == 1
Inp_data = randi([0 1],prm.n*N_CodeWord,1); % Ïåðåäàâàåìûå äàííûå
EncData = [];
for i=1:N_CodeWord
EncData = cat(1,EncData,ldpcEnc(Inp_data(1+(i-1)*prm.n:prm.n+(i-1)*prm.n))); % Êîäåð LDPC
end
IntrData= randintrlv(EncData,prm.SEED); %Ïåðåìåæèòåëü
else
Inp_data = randi([0 1],prm.n,1); % Ïåðåäàâàåìûå äàííûå
IntrData = Inp_data;
end
% SISO
if flag_coder_LDPC == 1
Inp_data_siso = randi([0 1],prm.n_siso*N_CodeWord,1); % Ïåðåäàâàåìûå äàííûå
EncData_siso = [];
for i=1:N_CodeWord
EncData_siso = cat(1,EncData_siso,ldpcEnc(Inp_data_siso(1+(i-1)*prm.n:prm.n+(i-1)*prm.n))); % Êîäåð LDPC
end
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
% 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(IntrData,prm.M,'InputType','bit');% 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,Nsymb_ofdm_mimo*N_CodeWord,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(IntrData_siso,prm.M_siso,'InputType','bit');% 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,Nsymb_ofdm_siso*N_CodeWord+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*Nsymb_ofdm_mimo*N_CodeWord,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*N_CodeWord
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*N_CodeWord,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(:);
Mod_data_out_siso_tmp = Mod_data_out_siso_ZF(:);
if(flag_coder_LDPC == 1)
CWL = CODEWORD_LENGTH;
Out_encode = qamdemod(Mod_data_out_tmp,prm.M,'OutputType','approxllr');
DeintData = randdeintrlv(Out_encode,prm.SEED);
Out_data = [];
for i = 1:N_CodeWord
Out_data = cat(1,Out_data,ldpcDec(DeintData(1+(i-1)*CWL:CWL+(i-1)*CWL)));% Äåêîäåð LDPC
end
else
Out_data = qamdemod(Mod_data_out_tmp,prm.M,'OutputType','bit');
end
if(flag_coder_LDPC == 1)
Out_encode_siso = qamdemod(Mod_data_out_siso_tmp,prm.M_siso,'OutputType','approxllr');
DeintData_siso = randdeintrlv(Out_encode_siso,prm.SEED);
Out_data_siso = [];
for i = 1:N_CodeWord
Out_data_siso = cat(1,Out_data_siso,ldpcDec(DeintData_siso(1+(i-1)*CWL:CWL+(i-1)*CWL))); % Äåêîäåð LDPC
end
else
Out_data_siso = qamdemod(Mod_data_out_siso_tmp,prm.M_siso,'OutputType','bit');
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;
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)));
str = ['DataBase/CR=' num2str(prm.CodeRate) '_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')
end