Cleaned up some code and made it more transparent.
git-svn-id: http://svn.eurecom.fr/openair4G/trunk@4043 818b1a75-f10b-46b9-bf7c-635c3b92a50f
This commit is contained in:
Cirkic
@@ -15,6 +15,8 @@ active_rfA=[1 0 0 0];
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active_rfB=[0 1 0 0];
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active_rf=active_rfA+active_rfB;
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if(active_rfA*active_rfB'!=0) error("The A and B transceive chains must be orthogonal./n") endif
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%fc = 2660000000;
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fc = 1912600000; %1907600000;
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%fc = 859.5e6;
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@@ -23,8 +25,8 @@ fc = 1912600000; %1907600000;
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%rf_mode=(RXEN+TXEN+TXLPFNORM+TXLPFEN+TXLPF25+RXLPFNORM+RXLPFEN+RXLPF25+LNA1ON+LNAByp+RFBBLNA1) * active_rf;
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autocal_mode=active_rf;
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rf_mode=(TXLPFNORM+TXLPFEN+TXLPF25+RXLPFNORM+RXLPFEN+RXLPF25+LNA1ON+LNAMax+RFBBNORM) * active_rf;
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tdd_config = DUPLEXMODE_FDD + TXRXSWITCH_TESTTX;
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%tdd_config = DUPLEXMODE_FDD + TXRXSWITCH_LSB;
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tdd_config = DUPLEXMODE_FDD+TXRXSWITCH_TESTTX; LSBSWITCH_FLAG=false;
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%tdd_config = DUPLEXMODE_FDD+TXRXSWITCH_LSB; LSBSWITCH_FLAG=true;
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syncmode = SYNCMODE_FREE;
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rf_local = [8254744 8255063 8257340 8257340]; %eNB2tx 1.9GHz
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rf_vcocal=rf_vcocal_19G*active_rf;
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@@ -1,134 +0,0 @@
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# % Author: Mirsad Cirkic
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# % Organisation: Eurecom (and Linkoping University)
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# % E-mail: mirsad.cirkic@liu.se
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if(paramsinitialized)
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N=76800;
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M=4;
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signalB2A=zeros(N,1);
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signalA2B=zeros(N,4);
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indA=find(active_rfA==1);
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indB=find(active_rfB==1);
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Nanta=length(indA);
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Nantb=length(indB);
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Niter=1;
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# %% ------- Node A to B channel measurements ------- %%
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# rf_mode_current = rf_mode + (DMAMODE_TX+TXEN)*active_rfA +(DMAMODE_RX+RXEN)*active_rfB;
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# 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);
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# [Da2b_T, signalA2B]=genrandpskseq(N,M,amp);
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# signalA2B=repmat(signalA2B,1,4);
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# oarf_send_frame(card,signalA2B,n_bit);
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# fprintf('A to B: Frame sent to Tx buffer.\n')
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# fprintf('A to B: Acquiring chan. measurements....\n')
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# loop=true;
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# chanests=[];
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# Da2b_R=zeros(Niter*120,Nantb*301);
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# Da2b_T=repmat(Da2b_T,Niter,Nantb);
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# for iter=0:(Niter-1) % Do the chan. est until SNR is good enough. That is, do the "oarf_get_fram(card)
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# receivedA2B=oarf_get_frame(card);
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# fprintf('A to B: Frame grabbed from Rx buffer.\n')
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# for i=0:119;
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# ifblock=receivedA2B(i*640+[1:640],indB);
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# ifblock(1:128,:)=[];
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# fblock=fft(ifblock);
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# fblock(1,:)=[];
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# fblock(151:360,:)=[];
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# Da2b_R(iter*120+i+1,:)=vec(fblock);
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# endfor
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# endfor
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# H=conj(Da2b_T).*Da2b_R;
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# phases=unwrap(angle(H));
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# chanests=diag(Da2b_T'*Da2b_R)/size(Da2b_T,1);
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# for i=0:(Nantb-1)
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# fchanests(:,i+1)=[0; chanests(301*i+[1:150]); zeros(210,1); chanests(301*i+[151:301])];
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# endfor
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# tchanests=ifft(fchanests);
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# %% -- Do some plotting
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# clf
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# figure(1)
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# for i=1:4
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# subplot(220+i);plot(20*log10(abs(fftshift(fft(receivedA2B(:,i))))));
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# endfor
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# figure(2)
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# t=[0:512-1]/512*1e-2;
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# plot(t,abs(tchanests))
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# xlabel('time')
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# ylabel('|h|')
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# figure(3)
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# % wndw = 50;
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# % for i=1:5:Nantb*301 %# sliding window size
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# % phamean = filter(ones(wndw,1)/wndw, 1, phases(:,i)); %# moving average
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# % plot(phamean(wndw:end),'LineWidth',2);
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# % title(['subcarrier ' num2str(i)]);
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# % xlabel('time')
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# % ylabel('phase')
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# % ylim([-pi pi])
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# % drawnow;
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# % pause(0.1)
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# % endfor
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# phavar=var(phases);
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# plotphavar=[];
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# for i=0:Nantb-1
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# plotphavar=[plotphavar; phavar([1:301]+i*301)];
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# endfor
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# plot([1:150 362:512],plotphavar,'o');
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# %ylim([0 pi])
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# xlabel('subcarrier')
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# ylabel('phase variance')
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# figure(4)
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# plot(20*log10(abs(fchanests))), ylim([40 100])
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# %end
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# oarf_stop(card);
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# fprintf(' done\n')
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%% ------- Node B to A channel measurements ------- %%
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rf_mode_current = rf_mode + (DMAMODE_TX+TXEN)*active_rfB +(DMAMODE_RX+RXEN)*active_rfA;
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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);
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signalB2A=zeros(N,4);
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Db2a_R=zeros(Niter*120,Nanta*301);
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[Db2a_T,tmps]=genorthqpskseq(Nantb,N,amp);
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ind=1;
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for i=1:4
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if(indB(ind)==i)
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signalB2A(:,i)=tmps(:,ind);
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if(length(indB)> ind) ind=ind+1; endif
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endif
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endfor
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%receivedB2A=sum(signalB2A*diag([1 2 3 4]),2)+100*randn(N,1);
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oarf_send_frame(card,signalB2A,n_bit);
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if(length(indA)!=1) error("Node A can only have one antenna active\n"); endif
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for iter=0:(Niter-1) % Do the chan. est until SNR is good enough. That is, do the "oarf_get_fram(card)
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fprintf('B to A: Frame grabbed from Rx buffer.\n')
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receivedB2A=oarf_get_frame(card);
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for i=0:119;
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ifblock=receivedB2A(i*640+[1:640],indA);
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ifblock(1:128,:)=[];
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fblock=fft(ifblock);
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fblock(1,:)=[];
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fblock(151:360,:)=[];
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Db2a_R(iter*120+i+1,:)=fblock.';
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endfor
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endfor
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oarf_stop(card);
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# # -- Do the channel estimation
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chanests=reshape(diag(repmat(Db2a_T,Niter,1)'*repmat(Db2a_R,1,Nantb)/(Niter*120)),301,Nantb);
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H=conj(repmat(Db2a_T,Niter,1)).*repmat(Db2a_R,1,Nantb);
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phases=unwrap(angle(H));
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# for i=0:(Nantb-1)
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# fchanests(:,i+1)=[0; chanests(301*i+[1:150]); zeros(210,1); chanests(301*i+[151:301])];
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# endfor
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# tchanests=ifft(fchanests);
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else
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error('You have to run init.params.m first!')
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end
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@@ -0,0 +1,155 @@
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# % Author: Mirsad Cirkic
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# % Organisation: Eurecom (and Linkoping University)
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# % E-mail: mirsad.cirkic@liu.se
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if(paramsinitialized && LSBSWITCH_FLAG)
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disp(["\n\n------------\nThis code is, so far, only written for single runs. Multiple " ...
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"runs will overwrite the previous measurement data, i.e., the " ...
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"data structures are not defined for multiple runs. You will need to " ...
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"add code in order to save the intermediate measurements and the " ...
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"corresponding timestamps.\n------------"])
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N=76800;
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M=4;
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signalA2B=zeros(N,4);
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signalB2A=zeros(N,4);
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indA=find(active_rfA==1);
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indB=find(active_rfB==1);
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Nanta=length(indA);
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Nantb=length(indB);
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Niter=1;
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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.
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if(mod(Nofs,640)!=0) error("blabla") endif
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if(Nanta!=1) error("Node A can only have one antenna active\n"); endif
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if(Niter!=1) error("We should only use one get_frame at each run.\n"); endif
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# %% ------- Prepare the signals for both A2B and B2A ------- %
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maskA2B=kron(ones(1,N/(2*Nofs)),[ones(1,Nofs) zeros(1,Nofs)])';
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maskB2A=ones(N,1)-maskA2B;
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datamaskA2B=diag(kron(ones(1,N/(2*Nofs)),[ones(1,Nofs/640) zeros(1,Nofs/640)]));
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datamaskB2A=eye(N/640)-datamaskA2B;
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signalA2B=zeros(N,4);
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signalB2A=zeros(N,4);
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ia=1; ib=1;
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Db2a_T=[];
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for i=1:4
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if(indA(ia)==i)
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[tmpd, tmps]=genrandpskseq(N,M,amp);
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Da2b_T=datamaskA2B*tmpd;
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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
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if(length(indA)> ia) ia=ia+1; endif
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endif
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if(indB(ib)==i)
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% This part could be improved by creating fully orthogonal sequences
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[tmpd, tmps]=genrandpskseq(N,M,amp);
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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.
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Db2a_T=[Db2a_T datamaskB2A*tmpd];
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if(length(indB)> ib) ib=ib+1; endif
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endif
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endfor
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signal = signalA2B+signalB2A;
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# %% ------- Node B and A duplex transmission/reception ------- %%
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rf_mode_current = rf_mode + (DMAMODE_TX+TXEN+DMAMODE_RX+RXEN)*active_rf;
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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);
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oarf_send_frame(card,signal,n_bit);
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received=oarf_get_frame(card);
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oarf_stop(card);
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receivedA2B=received.*repmat(maskA2B,1,4);
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receivedB2A=received.*repmat(maskB2A,1,4);
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# %% ------- Do the A to B channel estimation ------- %%
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Da2b_R=zeros(Niter*120,Nantb*301);
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for i=0:119;
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ifblock=receivedA2B(i*640+[1:640],indB);
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ifblock(1:128,:)=[];
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fblock=fft(ifblock);
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fblock(1,:)=[];
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fblock(151:360,:)=[];
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Da2b_R((Niter-1)*120+i+1,:)=vec(fblock);
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endfor
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HA2B=repmat(conj(Da2b_T),1,Nantb).*Da2b_R;
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phasesA2B=unwrap(angle(HA2B));
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if(mean(var(phasesA2B))>0.5)
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disp("The phases of your estimates are a bit high (larger than 0.5 rad.), something is wrong.");
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endif
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chanestsA2B=reshape(diag(repmat(Da2b_T,1,Nantb)'*Da2b_R)/size(Da2b_T,1),301,Nantb);
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fchanestsA2B=zeros(512,Nantb);
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for i=1:Nantb
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fchanestsA2B(:,i)=[0; chanestsA2B([1:150],i); zeros(210,1); chanestsA2B(151:301,i)];
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endfor
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tchanestsA2B=ifft(fchanestsA2B);
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%% ------- Do the B to A channel estimation ------- %%
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Db2a_R=zeros(Niter*120,Nanta*301);
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for i=0:119;
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ifblock=receivedB2A(i*640+[1:640],indA);
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ifblock(1:128,:)=[];
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fblock=fft(ifblock);
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fblock(1,:)=[];
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fblock(151:360,:)=[];
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Db2a_R((Niter-1)*120+i+1,:)=fblock.';
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endfor
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HB2A=conj(repmat(Db2a_T,Niter,1)).*repmat(Db2a_R,1,Nantb);
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phasesB2A=unwrap(angle(HB2A));
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if(mean(var(phasesB2A))>0.5)
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disp("The phases of your estimates are a bit high (larger than 0.5 rad.), something is wrong.");
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endif
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chanestsB2A=reshape(diag(repmat(Db2a_T,Niter,1)'*repmat(Db2a_R,1,Nantb)/(Niter*120)),301,Nantb);
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# %% -- Some plotting code -- %% (you can uncomment what you see fit)
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# clf
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# figure(1)
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# for i=1:4
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# subplot(220+i);plot(20*log10(abs(fftshift(fft(receivedA2B(:,i))))));
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# endfor
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# figure(2)
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# t=[0:512-1]/512*1e-2;
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# plot(t,abs(tchanests))
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# xlabel('time')
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# ylabel('|h|')
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# figure(3)
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# % wndw = 50;
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# % for i=1:5:Nantb*301 %# sliding window size
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# % phamean = filter(ones(wndw,1)/wndw, 1, phases(:,i)); %# moving average
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# % plot(phamean(wndw:end),'LineWidth',2);
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# % title(['subcarrier ' num2str(i)]);
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# % xlabel('time')
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# % ylabel('phase')
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# % ylim([-pi pi])
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# % drawnow;
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# % pause(0.1)
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# % endfor
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# phavar=var(phases);
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# plotphavar=[];
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# for i=0:Nantb-1
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# plotphavar=[plotphavar; phavar([1:301]+i*301)];
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# endfor
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# plot([1:150 362:512],plotphavar,'o');
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# %ylim([0 pi])
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# xlabel('subcarrier')
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# ylabel('phase variance')
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# figure(4)
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# plot(20*log10(abs(fchanests))), ylim([40 100])
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# %end
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# fprintf(' done\n')
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# for i=0:(Nantb-1)
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# fchanests(:,i+1)=[0; chanests(301*i+[1:150]); zeros(210,1); chanests(301*i+[151:301])];
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# endfor
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# tchanests=ifft(fchanests);
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else
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if(!LSBSWITCH_FLAG) error("You have to set the LSB switch flag (LSBSWITCH_FLAG) in initparams.m.\n")
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else error("You have to run init.params.m first!")
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endif
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endif
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@@ -2,15 +2,16 @@
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# % Organisation: Eurecom (and Linkoping University)
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# % E-mail: mirsad.cirkic@liu.se
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||||
|
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if(paramsinitialized)
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disp("This code is so far only written for single runs. Multiple \
|
||||
runs will overwrite the previous measurement data, i.e., the \
|
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data structures are not defined for multiple runs. You will need to \
|
||||
add code in order to save the intermediate measurements.")
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if(paramsinitialized && ~LSBSWITCH_FLAG)
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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------------"])
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||||
N=76800;
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M=4;
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signalB2A=zeros(N,1);
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signalA2B=zeros(N,4);
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signalB2A=zeros(N,4);
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indA=find(active_rfA==1);
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indB=find(active_rfB==1);
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Nanta=length(indA);
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@@ -22,32 +23,39 @@ if(paramsinitialized)
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endif
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# %% ------- Prepare the signals for both A2B and B2A ------- %%
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[Da2b_T, signalA2B]=genrandpskseq(N,M,amp);
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signalA2B=repmat(signalA2B,1,4);
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signalA2B=zeros(N,4);
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signalB2A=zeros(N,4);
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[Db2a_T,tmps]=genorthqpskseq(Nantb,N,amp);
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ind=1;
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ia=1; ib=1;
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Db2a_T=[];
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for i=1:4
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if(indB(ind)==i)
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signalB2A(:,i)=tmps(:,ind);
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if(length(indB)> ind) ind=ind+1; endif
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if(indA(ia)==i)
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[Da2b_T, tmps]=genrandpskseq(N,M,amp);
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signalA2B(:,i)=tmps;
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if(length(indA)> ia) ia=ia+1; endif
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endif
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if(indB(ib)==i)
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% This part could be improved by creating fully orthogonal sequences
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[tmpd, tmps]=genrandpskseq(N,M,amp);
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signalB2A(:,i)=tmps;
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||||
Db2a_T=[Db2a_T tmpd];
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if(length(indB)> ib) ib=ib+1; endif
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endif
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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
|
||||
|
||||
Reference in New Issue
Block a user