Commit 35169c13 authored by Cirkic's avatar Cirkic
Browse files

Cleaned up some code and made it more transparent.

git-svn-id: http://svn.eurecom.fr/openair4G/trunk@4043 818b1a75-f10b-46b9-bf7c-635c3b92a50f
parent c160f96d
......@@ -15,6 +15,8 @@ active_rfA=[1 0 0 0];
active_rfB=[0 1 0 0];
active_rf=active_rfA+active_rfB;
if(active_rfA*active_rfB'!=0) error("The A and B transceive chains must be orthogonal./n") endif
%fc = 2660000000;
fc = 1912600000; %1907600000;
%fc = 859.5e6;
......@@ -23,8 +25,8 @@ fc = 1912600000; %1907600000;
%rf_mode=(RXEN+TXEN+TXLPFNORM+TXLPFEN+TXLPF25+RXLPFNORM+RXLPFEN+RXLPF25+LNA1ON+LNAByp+RFBBLNA1) * active_rf;
autocal_mode=active_rf;
rf_mode=(TXLPFNORM+TXLPFEN+TXLPF25+RXLPFNORM+RXLPFEN+RXLPF25+LNA1ON+LNAMax+RFBBNORM) * active_rf;
tdd_config = DUPLEXMODE_FDD + TXRXSWITCH_TESTTX;
%tdd_config = DUPLEXMODE_FDD + TXRXSWITCH_LSB;
tdd_config = DUPLEXMODE_FDD+TXRXSWITCH_TESTTX; LSBSWITCH_FLAG=false;
%tdd_config = DUPLEXMODE_FDD+TXRXSWITCH_LSB; LSBSWITCH_FLAG=true;
syncmode = SYNCMODE_FREE;
rf_local = [8254744 8255063 8257340 8257340]; %eNB2tx 1.9GHz
rf_vcocal=rf_vcocal_19G*active_rf;
......
# % Author: Mirsad Cirkic
# % Organisation: Eurecom (and Linkoping University)
# % E-mail: mirsad.cirkic@liu.se
if(paramsinitialized)
N=76800;
M=4;
signalB2A=zeros(N,1);
signalA2B=zeros(N,4);
indA=find(active_rfA==1);
indB=find(active_rfB==1);
Nanta=length(indA);
Nantb=length(indB);
Niter=1;
# %% ------- Node A to B channel measurements ------- %%
# rf_mode_current = rf_mode + (DMAMODE_TX+TXEN)*active_rfA +(DMAMODE_RX+RXEN)*active_rfB;
# oarf_config_exmimo(card, freq_rx,freq_tx,tdd_config,syncmode,rx_gain,tx_gain,eNB_flag,rf_mode_current,rf_rxdc,rf_local,rf_vcocal,rffe_rxg_low,rffe_rxg_final,rffe_band,autocal_mode);
# [Da2b_T, signalA2B]=genrandpskseq(N,M,amp);
# signalA2B=repmat(signalA2B,1,4);
# oarf_send_frame(card,signalA2B,n_bit);
# fprintf('A to B: Frame sent to Tx buffer.\n')
# fprintf('A to B: Acquiring chan. measurements....\n')
# loop=true;
# chanests=[];
# Da2b_R=zeros(Niter*120,Nantb*301);
# Da2b_T=repmat(Da2b_T,Niter,Nantb);
# for iter=0:(Niter-1) % Do the chan. est until SNR is good enough. That is, do the "oarf_get_fram(card)
# receivedA2B=oarf_get_frame(card);
# fprintf('A to B: Frame grabbed from Rx buffer.\n')
# for i=0:119;
# ifblock=receivedA2B(i*640+[1:640],indB);
# ifblock(1:128,:)=[];
# fblock=fft(ifblock);
# fblock(1,:)=[];
# fblock(151:360,:)=[];
# Da2b_R(iter*120+i+1,:)=vec(fblock);
# endfor
# endfor
# H=conj(Da2b_T).*Da2b_R;
# phases=unwrap(angle(H));
# chanests=diag(Da2b_T'*Da2b_R)/size(Da2b_T,1);
# for i=0:(Nantb-1)
# fchanests(:,i+1)=[0; chanests(301*i+[1:150]); zeros(210,1); chanests(301*i+[151:301])];
# endfor
# tchanests=ifft(fchanests);
# %% -- Do some plotting
# clf
# figure(1)
# for i=1:4
# subplot(220+i);plot(20*log10(abs(fftshift(fft(receivedA2B(:,i))))));
# endfor
# figure(2)
# t=[0:512-1]/512*1e-2;
# plot(t,abs(tchanests))
# xlabel('time')
# ylabel('|h|')
# figure(3)
# % wndw = 50;
# % for i=1:5:Nantb*301 %# sliding window size
# % phamean = filter(ones(wndw,1)/wndw, 1, phases(:,i)); %# moving average
# % plot(phamean(wndw:end),'LineWidth',2);
# % title(['subcarrier ' num2str(i)]);
# % xlabel('time')
# % ylabel('phase')
# % ylim([-pi pi])
# % drawnow;
# % pause(0.1)
# % endfor
# phavar=var(phases);
# plotphavar=[];
# for i=0:Nantb-1
# plotphavar=[plotphavar; phavar([1:301]+i*301)];
# endfor
# plot([1:150 362:512],plotphavar,'o');
# %ylim([0 pi])
# xlabel('subcarrier')
# ylabel('phase variance')
# figure(4)
# plot(20*log10(abs(fchanests))), ylim([40 100])
# %end
# oarf_stop(card);
# fprintf(' done\n')
%% ------- Node B to A channel measurements ------- %%
rf_mode_current = rf_mode + (DMAMODE_TX+TXEN)*active_rfB +(DMAMODE_RX+RXEN)*active_rfA;
oarf_config_exmimo(card, freq_rx,freq_tx,tdd_config,syncmode,rx_gain,tx_gain,eNB_flag,rf_mode_current,rf_rxdc,rf_local,rf_vcocal,rffe_rxg_low,rffe_rxg_final,rffe_band,autocal_mode);
signalB2A=zeros(N,4);
Db2a_R=zeros(Niter*120,Nanta*301);
[Db2a_T,tmps]=genorthqpskseq(Nantb,N,amp);
ind=1;
for i=1:4
if(indB(ind)==i)
signalB2A(:,i)=tmps(:,ind);
if(length(indB)> ind) ind=ind+1; endif
endif
endfor
%receivedB2A=sum(signalB2A*diag([1 2 3 4]),2)+100*randn(N,1);
oarf_send_frame(card,signalB2A,n_bit);
if(length(indA)!=1) error("Node A can only have one antenna active\n"); endif
for iter=0:(Niter-1) % Do the chan. est until SNR is good enough. That is, do the "oarf_get_fram(card)
fprintf('B to A: Frame grabbed from Rx buffer.\n')
receivedB2A=oarf_get_frame(card);
for i=0:119;
ifblock=receivedB2A(i*640+[1:640],indA);
ifblock(1:128,:)=[];
fblock=fft(ifblock);
fblock(1,:)=[];
fblock(151:360,:)=[];
Db2a_R(iter*120+i+1,:)=fblock.';
endfor
endfor
oarf_stop(card);
# # -- Do the channel estimation
chanests=reshape(diag(repmat(Db2a_T,Niter,1)'*repmat(Db2a_R,1,Nantb)/(Niter*120)),301,Nantb);
H=conj(repmat(Db2a_T,Niter,1)).*repmat(Db2a_R,1,Nantb);
phases=unwrap(angle(H));
# for i=0:(Nantb-1)
# fchanests(:,i+1)=[0; chanests(301*i+[1:150]); zeros(210,1); chanests(301*i+[151:301])];
# endfor
# tchanests=ifft(fchanests);
else
error('You have to run init.params.m first!')
end
# % Author: Mirsad Cirkic
# % Organisation: Eurecom (and Linkoping University)
# % E-mail: mirsad.cirkic@liu.se
if(paramsinitialized && LSBSWITCH_FLAG)
disp(["\n\n------------\nThis code is, so far, only written for single runs. Multiple " ...
"runs will overwrite the previous measurement data, i.e., the " ...
"data structures are not defined for multiple runs. You will need to " ...
"add code in order to save the intermediate measurements and the " ...
"corresponding timestamps.\n------------"])
N=76800;
M=4;
signalA2B=zeros(N,4);
signalB2A=zeros(N,4);
indA=find(active_rfA==1);
indB=find(active_rfB==1);
Nanta=length(indA);
Nantb=length(indB);
Niter=1;
Nofs=3840; % The offset in samples between the downlink and uplink sequences. It must be a multiple of 640, 3840 samples is 0.5 ms.
if(mod(Nofs,640)!=0) error("blabla") endif
if(Nanta!=1) error("Node A can only have one antenna active\n"); endif
if(Niter!=1) error("We should only use one get_frame at each run.\n"); endif
# %% ------- Prepare the signals for both A2B and B2A ------- %
maskA2B=kron(ones(1,N/(2*Nofs)),[ones(1,Nofs) zeros(1,Nofs)])';
maskB2A=ones(N,1)-maskA2B;
datamaskA2B=diag(kron(ones(1,N/(2*Nofs)),[ones(1,Nofs/640) zeros(1,Nofs/640)]));
datamaskB2A=eye(N/640)-datamaskA2B;
signalA2B=zeros(N,4);
signalB2A=zeros(N,4);
ia=1; ib=1;
Db2a_T=[];
for i=1:4
if(indA(ia)==i)
[tmpd, tmps]=genrandpskseq(N,M,amp);
Da2b_T=datamaskA2B*tmpd;
signalA2B(:,i)=tmps*4.*maskA2B+maskB2A*sqrt(-1); %Added maskB2A to set the LSB correctly. The factor 4 there should make a 2 bit shift. Don't know if that is correct
if(length(indA)> ia) ia=ia+1; endif
endif
if(indB(ib)==i)
% This part could be improved by creating fully orthogonal sequences
[tmpd, tmps]=genrandpskseq(N,M,amp);
signalB2A(:,i)=tmps*4.*maskB2A+maskA2B*sqrt(-1); %Added maskA2B to set the LSB correctly. The factor 4 there should make a 2 bit shift. Don't know if that is correct.
Db2a_T=[Db2a_T datamaskB2A*tmpd];
if(length(indB)> ib) ib=ib+1; endif
endif
endfor
signal = signalA2B+signalB2A;
# %% ------- Node B and A duplex transmission/reception ------- %%
rf_mode_current = rf_mode + (DMAMODE_TX+TXEN+DMAMODE_RX+RXEN)*active_rf;
oarf_config_exmimo(card, freq_rx,freq_tx,tdd_config,syncmode,rx_gain,tx_gain,eNB_flag,rf_mode_current,rf_rxdc,rf_local,rf_vcocal,rffe_rxg_low,rffe_rxg_final,rffe_band,autocal_mode);
oarf_send_frame(card,signal,n_bit);
received=oarf_get_frame(card);
oarf_stop(card);
receivedA2B=received.*repmat(maskA2B,1,4);
receivedB2A=received.*repmat(maskB2A,1,4);
# %% ------- Do the A to B channel estimation ------- %%
Da2b_R=zeros(Niter*120,Nantb*301);
for i=0:119;
ifblock=receivedA2B(i*640+[1:640],indB);
ifblock(1:128,:)=[];
fblock=fft(ifblock);
fblock(1,:)=[];
fblock(151:360,:)=[];
Da2b_R((Niter-1)*120+i+1,:)=vec(fblock);
endfor
HA2B=repmat(conj(Da2b_T),1,Nantb).*Da2b_R;
phasesA2B=unwrap(angle(HA2B));
if(mean(var(phasesA2B))>0.5)
disp("The phases of your estimates are a bit high (larger than 0.5 rad.), something is wrong.");
endif
chanestsA2B=reshape(diag(repmat(Da2b_T,1,Nantb)'*Da2b_R)/size(Da2b_T,1),301,Nantb);
fchanestsA2B=zeros(512,Nantb);
for i=1:Nantb
fchanestsA2B(:,i)=[0; chanestsA2B([1:150],i); zeros(210,1); chanestsA2B(151:301,i)];
endfor
tchanestsA2B=ifft(fchanestsA2B);
%% ------- Do the B to A channel estimation ------- %%
Db2a_R=zeros(Niter*120,Nanta*301);
for i=0:119;
ifblock=receivedB2A(i*640+[1:640],indA);
ifblock(1:128,:)=[];
fblock=fft(ifblock);
fblock(1,:)=[];
fblock(151:360,:)=[];
Db2a_R((Niter-1)*120+i+1,:)=fblock.';
endfor
HB2A=conj(repmat(Db2a_T,Niter,1)).*repmat(Db2a_R,1,Nantb);
phasesB2A=unwrap(angle(HB2A));
if(mean(var(phasesB2A))>0.5)
disp("The phases of your estimates are a bit high (larger than 0.5 rad.), something is wrong.");
endif
chanestsB2A=reshape(diag(repmat(Db2a_T,Niter,1)'*repmat(Db2a_R,1,Nantb)/(Niter*120)),301,Nantb);
# %% -- Some plotting code -- %% (you can uncomment what you see fit)
# clf
# figure(1)
# for i=1:4
# subplot(220+i);plot(20*log10(abs(fftshift(fft(receivedA2B(:,i))))));
# endfor
# figure(2)
# t=[0:512-1]/512*1e-2;
# plot(t,abs(tchanests))
# xlabel('time')
# ylabel('|h|')
# figure(3)
# % wndw = 50;
# % for i=1:5:Nantb*301 %# sliding window size
# % phamean = filter(ones(wndw,1)/wndw, 1, phases(:,i)); %# moving average
# % plot(phamean(wndw:end),'LineWidth',2);
# % title(['subcarrier ' num2str(i)]);
# % xlabel('time')
# % ylabel('phase')
# % ylim([-pi pi])
# % drawnow;
# % pause(0.1)
# % endfor
# phavar=var(phases);
# plotphavar=[];
# for i=0:Nantb-1
# plotphavar=[plotphavar; phavar([1:301]+i*301)];
# endfor
# plot([1:150 362:512],plotphavar,'o');
# %ylim([0 pi])
# xlabel('subcarrier')
# ylabel('phase variance')
# figure(4)
# plot(20*log10(abs(fchanests))), ylim([40 100])
# %end
# fprintf(' done\n')
# for i=0:(Nantb-1)
# fchanests(:,i+1)=[0; chanests(301*i+[1:150]); zeros(210,1); chanests(301*i+[151:301])];
# endfor
# tchanests=ifft(fchanests);
else
if(!LSBSWITCH_FLAG) error("You have to set the LSB switch flag (LSBSWITCH_FLAG) in initparams.m.\n")
else error("You have to run init.params.m first!")
endif
endif
......@@ -2,15 +2,16 @@
# % Organisation: Eurecom (and Linkoping University)
# % E-mail: mirsad.cirkic@liu.se
if(paramsinitialized)
disp("This code is so far only written for single runs. Multiple \
runs will overwrite the previous measurement data, i.e., the \
data structures are not defined for multiple runs. You will need to \
add code in order to save the intermediate measurements.")
if(paramsinitialized && ~LSBSWITCH_FLAG)
disp(["\n\n------------\nThis code is, so far, only written for single runs. Multiple " ...
"runs will overwrite the previous measurement data, i.e., the " ...
"data structures are not defined for multiple runs. You will need to " ...
"add code in order to save the intermediate measurements and the " ...
"corresponding timestamps.\n------------"])
N=76800;
M=4;
signalB2A=zeros(N,1);
signalA2B=zeros(N,4);
signalB2A=zeros(N,4);
indA=find(active_rfA==1);
indB=find(active_rfB==1);
Nanta=length(indA);
......@@ -22,32 +23,39 @@ if(paramsinitialized)
endif
# %% ------- Prepare the signals for both A2B and B2A ------- %%
[Da2b_T, signalA2B]=genrandpskseq(N,M,amp);
signalA2B=repmat(signalA2B,1,4);
signalA2B=zeros(N,4);
signalB2A=zeros(N,4);
[Db2a_T,tmps]=genorthqpskseq(Nantb,N,amp);
ind=1;
ia=1; ib=1;
Db2a_T=[];
for i=1:4
if(indB(ind)==i)
signalB2A(:,i)=tmps(:,ind);
if(length(indB)> ind) ind=ind+1; endif
if(indA(ia)==i)
[Da2b_T, tmps]=genrandpskseq(N,M,amp);
signalA2B(:,i)=tmps;
if(length(indA)> ia) ia=ia+1; endif
endif
if(indB(ib)==i)
% This part could be improved by creating fully orthogonal sequences
[tmpd, tmps]=genrandpskseq(N,M,amp);
signalB2A(:,i)=tmps;
Db2a_T=[Db2a_T tmpd];
if(length(indB)> ib) ib=ib+1; endif
endif
endfor
# %% ------- Node A to B transmission/reception ------- %%
rf_mode_current = rf_mode + (DMAMODE_TX+TXEN)*active_rfA +(DMAMODE_RX+RXEN)*active_rfB;
oarf_config_exmimo(card, freq_rx,freq_tx,tdd_config,syncmode,rx_gain,tx_gain,eNB_flag,rf_mode_current,rf_rxdc,rf_local,rf_vcocal,rffe_rxg_low,rffe_rxg_final,rffe_band,autocal_mode);
oarf_send_frame(card,signalA2B,n_bit);
receivedB2A=oarf_get_frame(card);
oarf_stop(card);
# %% ------- Node B to A transmission/reception ------- %%
# %% ------- Node B to A transmission ------- %%
rf_mode_current = rf_mode + (DMAMODE_TX+TXEN)*active_rfB +(DMAMODE_RX+RXEN)*active_rfA;
oarf_config_exmimo(card, freq_rx,freq_tx,tdd_config,syncmode,rx_gain,tx_gain,eNB_flag,rf_mode_current,rf_rxdc,rf_local,rf_vcocal,rffe_rxg_low,rffe_rxg_final,rffe_band,autocal_mode);
oarf_send_frame(card,signalB2A,n_bit);
receivedB2A=oarf_get_frame(card);
oarf_stop(card);
# %% ------- Node A to B transmission ------- %%
rf_mode_current = rf_mode + (DMAMODE_TX+TXEN)*active_rfA +(DMAMODE_RX+RXEN)*active_rfB;
oarf_config_exmimo(card, freq_rx,freq_tx,tdd_config,syncmode,rx_gain,tx_gain,eNB_flag,rf_mode_current,rf_rxdc,rf_local,rf_vcocal,rffe_rxg_low,rffe_rxg_final,rffe_band,autocal_mode);
oarf_send_frame(card,signalA2B,n_bit);
receivedA2B=oarf_get_frame(card);
oarf_stop(card);
# %% ------- Do the A to B channel estimation ------- %%
Da2b_R=zeros(Niter*120,Nantb*301);
for i=0:119;
......@@ -56,17 +64,18 @@ if(paramsinitialized)
fblock=fft(ifblock);
fblock(1,:)=[];
fblock(151:360,:)=[];
Da2b_R(iter*120+i+1,:)=vec(fblock);
Da2b_R((Niter-1)*120+i+1,:)=vec(fblock);
endfor
HA2B=conj(Da2b_T).*Da2b_R;
HA2B=repmat(conj(Da2b_T),1,Nantb).*Da2b_R;
phasesA2B=unwrap(angle(HA2B));
if(mean(var(phasesA2B))>0.5)
disp("The phases of your estimates are a bit high (larger than 0.5 rad.), something is wrong.");
endif
chanestsA2B=diag(Da2b_T'*Da2b_R)/size(Da2b_T,1);
for i=0:(Nantb-1)
fchanestsA2B(:,i+1)=[0; chanestsA2B(301*i+[1:150]); zeros(210,1); chanestsA2B(301*i+[151:301])];
chanestsA2B=reshape(diag(repmat(Da2b_T,1,Nantb)'*Da2b_R)/size(Da2b_T,1),301,Nantb);
fchanestsA2B=zeros(512,Nantb);
for i=1:Nantb
fchanestsA2B(:,i)=[0; chanestsA2B([1:150],i); zeros(210,1); chanestsA2B(151:301,i)];
endfor
tchanestsA2B=ifft(fchanestsA2B);
......@@ -78,7 +87,7 @@ if(paramsinitialized)
fblock=fft(ifblock);
fblock(1,:)=[];
fblock(151:360,:)=[];
Db2a_R(iter*120+i+1,:)=fblock.';
Db2a_R((Niter-1)*120+i+1,:)=fblock.';
endfor
HB2A=conj(repmat(Db2a_T,Niter,1)).*repmat(Db2a_R,1,Nantb);
phasesB2A=unwrap(angle(HB2A));
......@@ -137,5 +146,7 @@ if(paramsinitialized)
else
error("You have to run init.params.m first!")
end
if(LSBSWITCH_FLAG) error("You have to unset the LSB switch flag (LSBSWITCH_FLAG) in initparams.m.\n")
else error("You have to run init.params.m first!")
endif
endif
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