-
Notifications
You must be signed in to change notification settings - Fork 3
/
channelpath.m
201 lines (161 loc) · 7.58 KB
/
channelpath.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
function [channelOut]=channelpath(Timesignal,chan,SNR)
%global sysCfg;
sysCfg=sysCfgStr();
channelchoise =chan;%'awgn';
ts=sysCfg.ts;
tsNsec=sysCfg.tsNsec;
%channel type {'PedB', 'PedBcorr'}
%ChanMod.PDP_dB = [0 -0.9 -4.9 -8 -7.8 -23.9; % Average power [dB]
% 0 200*10^-9 800*10^-9 1200*10^-9 2300*10^-9 3700*10^-9]; % delay (s)
%ChanMod.PDP_dB = [0 -0.9 -4.9 -8 -7.8 -23.9; % Average power [dB]
%%%0 1*10^-9 800*10^-9 1200*10^-9 2300*10^-9 3700*10^-9]; % delay (s)
% 0 1*10^-9 80*10^-9 120*10^-9 230*10^-9 370*10^-9]; % delay (s)
delay=[0 30 150 310 370 710 1090 1730 2510];%delay
EVA.PDP_dB(1,:)=[0 -1.5 -1.4 -3.6 -0.6 -9.1 -7.0 -12.0 -16.9];%power(dB)
EVA.PDP_dB(2,:)=ts*delay/tsNsec;
EVA.normH = sqrt(sum(10.^(EVA.PDP_dB(1,:)/10)));
delay=[0 50 120 200 230 500 1600 2300 5000];%delay
ETU.PDP_dB(1,:)=[-1.0 -1.0 -1.0 0 0 0 -3.0 -5.0 -7.0];%power(dB)
ETU.PDP_dB(2,:)=ts*delay/tsNsec;
ETU.normH = sqrt(sum(10.^(ETU.PDP_dB(1,:)/10)));
delay=[0 30 70 90 110 190 410];%delay
EPA.PDP_dB(1,:)=[0 -1.0 -2.0 -3.0 -8.0 -17.2 -20.8];%power(dB)
EPA.PDP_dB(2,:)=ts*delay/tsNsec;
EPA.normH = sqrt(sum(10.^(EPA.PDP_dB(1,:)/10)));
ChanMod.PDP_dB = [0 -0.9 -0.6 -0.1; % Average power [dB]
%%%0 1*10^-9 800*10^-9 1200*10^-9 2300*10^-9 3700*10^-9]; % delay (s)
0 2*ts 4*ts 20*ts];
%0 2000*10^-9]; % delay (s)
ChanMod.normH = sqrt(sum(10.^(ChanMod.PDP_dB(1,:)/10)));
ChanMod2.PDP_dB = [0; % Average power [dB]
%%%0 1*10^-9 800*10^-9 1200*10^-9 2300*10^-9 3700*10^-9]; % delay (s)
0]; % delay (s)
ChanMod2.normH = sqrt(sum(10.^(ChanMod2.PDP_dB(1,:)/10)));
if strcmp(channelchoise,'awgn')
channelmodel=ChanMod2;
channelOut0=Timesignal;
%channelOut0=awgn(Timesignal,SNR);%,'measured');
elseif strcmp(channelchoise,'ETU') %multiPath
plusdoppler=rayleighchan(ts,300);%max is 300
plusdoppler.ResetBeforeFiltering=1;
plusdoppler.PathDelay=[0];% 10*ts ];%20*ts];
plusdoppler.AvgPathGaindB=[0];%; 0];% 0];
b=sqrt(sum(10.^(plusdoppler.AvgPathGaindB(1,:)/10)));
Timesignal=filter(plusdoppler,Timesignal)/b;
channelmodel=EVA;
elseif strcmp(channelchoise,'EVA') %multiPath
plusdoppler=rayleighchan(ts,70);%max is 70
plusdoppler.ResetBeforeFiltering=1;
plusdoppler.PathDelay=[0];% 10*ts ];%20*ts];
plusdoppler.AvgPathGaindB=[0];%; 0];% 0];
b=sqrt(sum(10.^(plusdoppler.AvgPathGaindB(1,:)/10)));
Timesignal=filter(plusdoppler,Timesignal)/b;
channelmodel=EVA;
elseif strcmp(channelchoise,'EPA')% multiPath+rayleigh!!!
plusdoppler=rayleighchan(ts,5);%max is 5
plusdoppler.ResetBeforeFiltering=1;
plusdoppler.PathDelay=[0];% 10*ts ];%20*ts];
plusdoppler.AvgPathGaindB=[0];%; 0];% 0];
b=sqrt(sum(10.^(plusdoppler.AvgPathGaindB(1,:)/10)));
Timesignal=filter(plusdoppler,Timesignal)/b;
% rayleih1=rayleighchan(sysCfg.ts,50);
% %rayleih1.StoreHistory=1; %this should be false if MaxDopplerShift is zero
% rayleih1.ResetBeforeFiltering=0;
% %rayleih1.DopplerSpectrum=doppler.flat;
% rayleih1.PathDelay=[0];% 10*ts ];%20*ts];
% rayleih1.AvgPathGaindB=[0];%; 0];% 0];
% %rayleih1.NormalizePathGains=1;
% b=sqrt(sum(10.^(rayleih1.AvgPathGaindB(1,:)/10)));
% Timesignal=filter(rayleih1,Timesignal)/b;
channelmodel=EPA;
elseif strcmp(channelchoise,'multipath')% multiPath+rayleigh!!!
rayleih1=rayleighchan(sysCfg.ts,50);
%rayleih1.StoreHistory=1; %this should be false if MaxDopplerShift is zero
rayleih1.ResetBeforeFiltering=0;
%rayleih1.DopplerSpectrum=doppler.flat;
rayleih1.PathDelay=[0];% 10*ts ];%20*ts];
rayleih1.AvgPathGaindB=[0];%; 0];% 0];
%rayleih1.NormalizePathGains=1;
b=sqrt(sum(10.^(rayleih1.AvgPathGaindB(1,:)/10)));
Timesignal=filter(rayleih1,Timesignal)/b;
channelmodel=ChanMod;
elseif strcmp(channelchoise,'raylei')
rayleih1=rayleighchan(sysCfg.ts,100);
%rayleih1.StoreHistory=1; %this should be false if MaxDopplerShift is zero
rayleih1.ResetBeforeFiltering=0;
%rayleih1.DopplerSpectrum=doppler.flat;
rayleih1.PathDelay=[0 14*ts];% 10*ts ];%20*ts];
rayleih1.AvgPathGaindB=[-0.5 0];%; 0];% 0];
%rayleih1.NormalizePathGains=1;
b=sqrt(sum(10.^(rayleih1.AvgPathGaindB(1,:)/10)));
channelOut0=filter(rayleih1,Timesignal)/b;
channelOut0=reshape(channelOut0,length(channelOut0),1);
end
% switch channelchoise
% case 'awgn'
% channelmodel=ChanMod2;
% case 'multipath'
% channelmodel=ChanMod;
% case 'raylei'
% % ts=1/30720;
% % x=rayleighchan(ts,1);
% % x.StoreHistory=1;
% % x.PathDelay=[0 10*ts 20*ts];
% % x.AvgPathGaindB=[1 0.8 0];
% %ts=1/30720;
% rayleih1=rayleighchan(sysCfg.ts,0);
% rayleih1.StoreHistory=1;
% rayleih1.ResetBeforeFiltering=0;
% rayleih1.DopplerSpectrum=doppler.flat;
% rayleih1.PathDelay=[10*ts];% 10*ts ];%20*ts];
% rayleih1.AvgPathGaindB=[1];%; 0];% 0];
% rayleih1.NormalizePathGains=1;
% channelOut=filter(rayleih1,Timesignal);
% %channelOut1=filter(sys.rayleih2,Timesignal(2,:));
% end
if strcmp(channelchoise,'raylei')==0 && strcmp(channelchoise,'awgn')==0 %
%if isequal(channelchoise,'raylei') == 0
%bandwidth=20M
fader=round(channelmodel.PDP_dB(2,:)*1000*sysCfg.fftsize*15);
unique_fader=unique(fader);
%G=[1+randn(1,length(unique_fader))/20+j*(1+randn(1,length(unique_fader))/20);1+randn(1,length(unique_fader))/20+j*(1+randn(1,length(unique_fader))/20)];
%G=[ones(1,length(unique_fader))+j*(ones(1,length(unique_fader)));ones(1,length(unique_fader))+j*(ones(1,length(unique_fader)))]/sqrt(2);
G=[ones(1,length(unique_fader))+j*(ones(1,length(unique_fader)))]/sqrt(2);%;ones(1,length(unique_fader))+j*(ones(1,length(unique_fader)))]/sqrt(2);
h=[];
for fadeidx=1:length(unique_fader)
curr_fader=(fader==unique_fader(fadeidx));
h(:,unique_fader(fadeidx)+1)=[sqrt(sum(10.^(channelmodel.PDP_dB(1,curr_fader)./10))).*G(:,fadeidx)];
end
h=h./channelmodel.normH;
%y=[];
channelOut0 = conv(h, Timesignal);
channelOut0=reshape(channelOut0,length(channelOut0),1);
%channelOut1 = conv(h(2,:), Timesignal(2,:));
end
%channelOut = channelOut0(1:length(Timesignal));
%channelOut = [channelOut0(1:sum(sys.Ncplength(1:sys.Osn))+sys.Nfft*sys.Osn);channelOut1(1:sum(sys.Ncplength(1:sys.Osn))+sys.Nfft*sys.Osn)];
channelOut = channelOut0(1:length(Timesignal));
%% Add Noise
%n = 10^(-SNR/20)*(randn(size(channelOut0,1),1) + 1i*randn(size(channelOut0,1),1))/sqrt(2);%;/sqrt(ChanMod.nRX);
%channelOut0 = channelOut0 + n*sqrt(512/300);% not right for 3M and 1.4M ???
%channelOut0=awgn(channelOut0,SNR);%,'measured');
%sys.Channelnoise(1,:)=n;
%channelOut0 = channelOut0 + n*sqrt(1200/2048);
% n = 10^(-SNR/20)*(randn(1,size(channelOut1,2)) + 1i*randn(1,size(channelOut1,2)))/sqrt(2);%;/sqrt(ChanMod.nRX);
% channelOut1 = channelOut1 + n*sqrt(2048/1200);% not right for 3M and 1.4M
% sys.Channelnoise(2,:)=n;
%channelOut1 = channelOut1 + n*sqrt(1200/2048);
a=fft(channelOut); %F2T
%----------------ÐŵÀ´¦Àí--------------------------------------
Tx_signal_power=sum(abs(a).^2)/length(a);
noise_var=Tx_signal_power/(10^(SNR/10));
x=length(a);
rnoise=noise_var*(randi(21,x,1)-11)/10;
Inoise=noise_var*(randi(21,x,1)-11)/10;
noise=complex(rnoise,Inoise);
Rx_data = a+noise;
%b=awgn(a,SNR);
channelOut=ifft(Rx_data); % T2F
%channelOut = channelOut0(1:length(Timesignal));
%channelOut = [channelOut0(1:sum(sys.Ncplength(1:sys.Osn))+sys.Nfft*sys.Osn);channelOut1(1:sum(sys.Ncplength(1:sys.Osn))+sys.Nfft*sys.Osn)];
%sys.Channelht=h;