-
Notifications
You must be signed in to change notification settings - Fork 12
/
Copy pathgenerateMIMO.m
204 lines (198 loc) · 8.75 KB
/
generateMIMO.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
function [XAS,XRF,Y,YFRFr,YWRFr,bestAntennas,subSetA,Z,opts] = generateMIMO(Nr,Nrs,NrRF,NtRF,opts)
[Q, subSetA] = calculateNumberOfSubsets(Nr,Nrs);
Nray = opts.Nray_param;
Ncl = opts.Ncl_param;
Nscatter = Nray*Ncl;
%% Generate Array Positions.
rng(4096);
c = 3e8;
fc = 28e9;
lambda = c/fc;
Nt = opts.Nt_param(1);
txarray = phased.PartitionedArray(...
'Array',phased.URA([sqrt(Nt) sqrt(Nt)],lambda/2),...
'SubarraySelection',ones(NtRF,Nt),'SubarraySteering','Custom');
rxarray = phased.PartitionedArray(...
'Array',phased.URA([sqrt(Nr) sqrt(Nr)],lambda/2),...
'SubarraySelection',ones(NrRF,Nr),'SubarraySteering','Custom');
%% Generate User DOA/DOD
angspread = opts.angspread;
snr = db2pow(opts.snr_param);
noisevar = 1/snr;
% Nsnr = numel(opts.snr_param);
NNs = numel(opts.Ns_param);
NNcl = numel(opts.Ncl_param);
Ncl = opts.Ncl_param;
Nray = opts.Nray_param;
Nch = opts.Nchannels;
Nreal = opts.Nreal;
% bestClass = zeros(Nreal,1);
% bestAntennas = zeros(Nreal,Nrs);
Nb = NNcl*NNs*Nch;
N = Nreal*Nb;
XAS = zeros(Nr,Nt,3,N);
XRF = zeros(Nrs,Nt,3,N);
Y = zeros(1,N);
Yb = zeros(1,N);
% YRF = zeros(1,N);
if opts.selectOutputAsPhases == 1
YFRFr = zeros(N,Nt*NtRF);
YWRFr = zeros(N,Nrs*NrRF);
else
YFRFr = zeros(N,2*NtRF);
YWRFr = zeros(N,2*NrRF);
end
Z = repmat(struct('H',zeros(Nt,Nr)),1,N );
R = zeros(Q,1);
% Ropt = zeros(Q,1);
j = 1;
for nch = 1:Nch
for ncl = 1:NNcl
Ncl = opts.Ncl_param(ncl);
Nscatter = Nray*Ncl;
for ns = 1:NNs
Ns = opts.Ns_param(ns);
for nr = 1:Nreal
if length(opts.Ns_param) > 1
nn = ns;
elseif length(opts.Ncl_param) > 1
nn = ncl;
else
nn = j;
end
%%
if nn < round(Nreal/3)
snrH = opts.noiseLevelHdB(1);
elseif nn > round(Nreal/3) && nn < round(2*Nreal/3)
snrH = opts.noiseLevelHdB(2);
elseif nn > round(2*Nreal/3)
snrH = opts.noiseLevelHdB(3);
end
%%
if nr == 1 % first realization.
% compute randomly placed scatterer clusters
[H,Ar,At,rxang,txang] = generate_H_Ar_At(Ncl,Nscatter,Nray,angspread,lambda,txarray,rxarray,opts);
jFirst = j; % first.
H = awgn(H,snrH,'Measured');
Z(1,nn).H = H;
Z(1,nn).At = At;
Z(1,nn).Ar = Ar;
Z(1,nn).rxang = rxang;
Z(1,nn).txang = txang;
%% Antenna Selection.
% timeAS = tic;
for (qA = 1:Q)
R(qA,1) = helperComputeSpectralEfficiencyAS(H(subSetA(qA,:),:),Ns,snr);
end
% timeAS = toc(timeAS);
[~,qAb] = max(R(:,1));
%% Best antennas.
% qAb = 1; % no antenna selection.
bestAntennas = subSetA(qAb,:);
%% RF Chain Selection.
% consider MO Alt-Min results in the feasible set for simplicity. for
% a large set they will converge eventually.
[FoptMO,WoptMO] = helperOptimalHybridWeights(H,Ns,1/snr);
[~,FrfMO, ~] = MO_AltMin_F( FoptMO, NtRF, 1e-3);
[~,WrfMO, ~] = MO_AltMin_W( WoptMO, FoptMO, H, NrRF, 1/snr, 1e-3 );
Atb = [At FrfMO];
Arb = [Ar WrfMO];
% or not.
% Atb = [At ];
% Arb = [Ar ];
%%
[QF, subSetF] = calculateNumberOfSubsets(size(Atb,2),NtRF);
RhybF = zeros(QF,1);
RhybW = zeros(QF,1);
Frf = zeros(Nt,NtRF,QF);
Fbb = zeros(NtRF,Ns,QF);
Wrf = zeros(Nrs,NrRF,QF);
Wbb = zeros(NrRF,Ns,QF);
Z(1,nn).Atb = Atb;
Z(1,nn).Arb = Arb;
%% RF precoder design.
[Fopt,Wopt] = helperOptimalHybridWeights(H(bestAntennas,:),Ns,1/snr);
for qF = 1:QF
[Frf(:,:,qF),Fbb(:,:,qF)] = findFrfFbb(H(bestAntennas,:),Ns,NtRF,Atb(:,subSetF(qF,:)));
RhybF(qF,1) = helperComputeSpectralEfficiency(H(bestAntennas,:),Frf(:,:,qF)*Fbb(:,:,qF),Wopt,Ns,snr);
end
[~,qFb] = max(RhybF(:,1)); % best RF precoder.
%% RF combiner design.
% Fbest = Frf(:,:,qFb)*Fbb(:,:,qFb); % worse results.
Fbest = Fopt;
for qW = 1:QF
[Wrf(:,:,qW),Wbb(:,:,qW)] = findWrfWbb(H(bestAntennas,:),Ns,NrRF,Arb(bestAntennas,subSetF(qW,:)),1/snr);
RhybW(qW,1) = helperComputeSpectralEfficiency(H(bestAntennas,:),Fbest,Wrf(:,:,qW)*Wbb(:,:,qW),Ns,snr);
end
[~,qWb] = max(RhybW(:,1)); % best RF combiner.
%%
% selectedSteeringVectors = [subSetF(qFb,:);subSetF(qWb,:)]
%% Select phases for output
if opts.selectOutputAsPhases == 1
Z(1,nn).FrfSelected = Frf(:,:,qFb);
Z(1,nn).WrfSelected = Wrf(:,:,qWb);
Z(1,nn).FbbSelected = Fbb(:,:,qFb);
Z(1,nn).WbbSelected = Wbb(:,:,qWb);
else %% Select DOA/DOD for output
DOASelected = txang(:,subSetF(qFb,:));
DODSelected = rxang(:,subSetF(qWb,:));
Z(1,nn).rxang = rxang;
Z(1,nn).txang = txang;
Z(1,nn).DOASelected = DOASelected;
Z(1,nn).DODSelected = DODSelected;
end
else % other realizations.
H = awgn(Z(1,jFirst).H,snrH,'Measured');
Z(1,nn).H = H;
Z(1,nn).At = Z(1,jFirst).At;
Z(1,nn).Ar = Z(1,jFirst).Ar;
Z(1,nn).Atb = Z(1,jFirst).Atb;
Z(1,nn).Arb = Z(1,jFirst).Arb;
if opts.selectOutputAsPhases == 1 %% Select phases for output
Z(1,nn).FrfSelected = Z(1,jFirst).FrfSelected;%Frf(:,:,qFb);
Z(1,nn).WrfSelected = Z(1,jFirst).WrfSelected;%Wrf(:,:,qWb);
Z(1,nn).FbbSelected = Z(1,jFirst).FbbSelected;%Frf(:,:,qFb);
Z(1,nn).WbbSelected = Z(1,jFirst).WbbSelected;%Wrf(:,:,qWb);
% Z(1,nn).FrfSelected = Frf(:,:,qFb);
% Z(1,nn).WrfSelected = Wrf(:,:,qWb);
else %% Select DOA/DOD for output
DOASelected = txang(:,subSetF(qFb,:));
DODSelected = rxang(:,subSetF(qWb,:));
Z(1,nn).rxang = rxang;
Z(1,nn).txang = txang;
Z(1,nn).DOASelected = DOASelected;
Z(1,nn).DODSelected = DODSelected;
end
end
%% output of the network. classification
Y(1,j) = (qAb);
% YRF(1,j) = qFb;
Yb(1,j) = Y(1,jFirst);
Z(1,nn).Y = Yb(1,j);
% Z(1,nn).YRF = [qFb qWb];
if opts.selectOutputAsPhases == 1
YFRFr(j,:) = angle(vec(Z(1,nn).FrfSelected));
YWRFr(j,:) = angle(vec(Z(1,nn).WrfSelected));
% if isnan(YFRFr(j,:)) == 1
% pause
% end
else % DOA and DOD of users.
YFRFr(j,:) = pi/180*reshape(DOASelected,[2*NtRF,1]).';
YWRFr(j,:) = pi/180*reshape(DODSelected,[2*NrRF,1]).';
end
XAS(:,:,1,j) = abs(H);
XAS(:,:,2,j) = real(H);
XAS(:,:,3,j) = imag(H);
XRF(:,:,1,j) = abs(H(bestAntennas,:));
XRF(:,:,2,j) = real(H(bestAntennas,:));
XRF(:,:,3,j) = imag(H(bestAntennas,:));
j = j + 1;
% nch
end
end
end
nch
end
Y = Yb;
% Yu = kron(Yb,ones(1,Nb));
% Y = Yu;