updated octave code for reciprocity measurements

git-svn-id: http://svn.eurecom.fr/openair4G/trunk@4603 818b1a75-f10b-46b9-bf7c-635c3b92a50f

targets/PROJECTS/TDDREC/genorthqpskseq.m

@@ -35,7 +35,7 @@ for k=1:Ns
   sndgroup=(k-1)*301+[151:301]; # The second group of OFDM carriers
   for i=0:119
     fblock=[0 carrierdata(i+1,frstgroup) zeros(1,210) carrierdata(i+1,sndgroup)];
-    ifblock=ifft(fblock,512);				
+    ifblock=ifft(fblock,512)*sqrt(512);				
     block = [ifblock(end-127:end) ifblock]; # Cycl. prefix 
     s([1:640]+i*640,k)=floor(amp*block);
   endfor

targets/PROJECTS/TDDREC/genrandpskseq.m

@@ -20,7 +20,7 @@ for i=0:(N/640-1)
     carrierdata(i+1,j)=datablock(j);
   end
   fblock=[0 datablock(1:150) zeros(1,210) datablock(151:301)];
-  ifblock=ifft(fblock,512);
+  ifblock=ifft(fblock,512)*sqrt(512);;
   % Adding cycl. prefix making the block of 640 elements	
   block = [ifblock(end-127:end) ifblock]; 
   s([1:640]+i*640)=floor(amp*block);

targets/PROJECTS/TDDREC/initparams.m

@@ -15,9 +15,9 @@ eNB_flag = 0;
 card = 0;
 Ntrx=4;
 dual_tx=0;
-active_rfA=[1 1 0 0];
+active_rfA=[0 0 1 0];
-active_rfB=[0 0 1 1];
+active_rfB=[1 1 0 0];
-active_rf=active_rfA+active_rfB;
+active_rf=active_rfA | active_rfB;
 
 if(active_rfA*active_rfB'!=0) error("The A and B transceive chains must be orthogonal./n") endif
 
@@ -36,8 +36,8 @@ syncmode = SYNCMODE_FREE;
 rf_local = [8254744   8255063   8257340   8257340]; %eNB2tx 1.9GHz
 rf_vcocal=rf_vcocal_19G*active_rf;
 
-rffe_rxg_low = 63*active_rf;
+rffe_rxg_low = 31*active_rf;
-rffe_rxg_final = [30 30 30 30];
+rffe_rxg_final = 63*active_rf;
 rffe_band = B19G_TDD*active_rf;
 
 rf_rxdc = rf_rxdc*active_rf;
@@ -49,7 +49,7 @@ oarf_stop(card);
 sleep(0.1);
 oarf_config_exmimo(card, freq_rx,freq_tx,tdd_config,syncmode,rx_gain,tx_gain,eNB_flag,rf_mode,rf_rxdc,rf_local,rf_vcocal,rffe_rxg_low,rffe_rxg_final,rffe_band,autocal_mode);
 autocal_mode=0*active_rf; % Autocalibration is only needed the first time we conf. exmimo
-amp = pow2(14)-1;
+amp = pow2(12.5)-1;
 n_bit = 16;
 
 chanest_full = 1;

targets/PROJECTS/TDDREC/runmeas_full_duplex.m

@@ -143,13 +143,30 @@ if(paramsinitialized)
         %end
         fchanestsB2A(:,:,meas) = [zeros(1,Nantb); chanestsB2A([1:150],:,meas); zeros(210,Nantb); chanestsB2A(151:301,:,meas)];
         tchanestsB2A(:,:,meas)=ifft(fchanestsB2A(:,:,meas));
+    end % Nmeas
+
+    %% estimate the noise
+    no_signal=repmat(1+1j,76800,4);
+    oarf_send_frame(card,no_signal,n_bit);
+    sleep(0.01);
+    noise_received=oarf_get_frame(card);
+    % estimate noise in frequency domain
+    noise_f = zeros(120,301,4);
+    for i=0:119;
+      ifblock=noise_received(i*640+[1:640],:);
+      ifblock(1:128,:)=[];
+      fblock=fft(ifblock);
+      fblock(1,:)=[];
+      fblock(151:360,:)=[];
+      noise_f(i+1,:,:)=fblock;
     end
-    
+
+
     %% -- Some plotting code -- %%  (you can uncomment what you see fit)
-    received = [receivedB2A(:,indA) receivedA2B(:,indB)];
+    received = [receivedA2B(:,indB) receivedB2A(:,indA)];
     phases = phasesB2A;
     tchanests = [tchanestsA2B(:,:,end), tchanestsB2A(:,:,end)];
-    fchanests = [fchanestsA2B(:,:,end), fchanestsB2A(:,:,end)];
+    fchanests = [chanestsA2B(:,:,end), chanestsB2A(:,:,end)];
     
     clf
     figure(1)
@@ -164,16 +181,25 @@ if(paramsinitialized)
     plot(t,20*log10(abs(tchanests)))
     xlabel('time')
     ylabel('|h|')
-    legend('A->B1','A->B2','A->B3','B1->A','B2->A','B3->A');
+    if Nantb==3
-    %legend('A->B1','A->B2','B1->A','B2->A');
+      legend('A->B1','A->B2','A->B3','B1->A','B2->A','B3->A');
-    
+    else
+      legend('A->B1','A->B2','B1->A','B2->A');
+    end
+
     figure(3)
     plot(20*log10(abs(fchanests)));
+    hold on
+    plot(squeeze(10*log10(mean(abs(noise_f(:,:,[indB indA])).^2,1))),'.');
+    hold off
     ylim([40 100])
     xlabel('freq')
     ylabel('|h|')
-    legend('A->B1','A->B2','A->B3','B1->A','B2->A','B3->A');
+    if Nantb==3
-    %legend('A->B1','A->B2','B1->A','B2->A');
+      legend('A->B1','A->B2','A->B3','B1->A','B2->A','B3->A','Noise B1','Noise B2','Noise B3','Noise A');
+    else
+      legend('A->B1','A->B2','B1->A','B2->A','Noise B1','Noise B2','Noise A');
+    end
     
     if (0)
         figure(4)
@@ -219,7 +245,8 @@ if(paramsinitialized)
     end
     axis([-2 2 -2 2])
 
-    disp(squeeze(mean(Fhatloc,2)));
+    %disp(squeeze(mean(Fhatloc,2)));
+    drawnow;
     
 else
   error('You have to run init.params.m first!')

targets/PROJECTS/TDDREC/runmeas_long_chanest.m

@@ -105,10 +105,26 @@ if(paramsinitialized)
             Db2a_R((meas-1)*120+i+1,:)=fblock.';
         end
     end
+
+    %% estimate the noise
+    no_signal=repmat(1+1j,76800,4);
+    oarf_send_frame(card,no_signal,n_bit);
+    sleep(0.01);
+    noise_received=oarf_get_frame(card);
+    % estimate noise in frequency domain
+    noise_f = zeros(120,301,4);
+    for i=0:119;
+      ifblock=noise_received(i*640+[1:640],:);
+      ifblock(1:128,:)=[];
+      fblock=fft(ifblock);
+      fblock(1,:)=[];
+      fblock(151:360,:)=[];
+      noise_f(i+1,:,:)=fblock;
+    end
     
     %% ------- Do the A to B channel estimation ------- %%
     HA2B=repmat(conj(Da2b_T),1,Nantb).*Da2b_R;
-    phasesA2B=unwrap(angle(HA2B));
+    phasesA2B=mod(angle(HA2B),2*pi);
     if(mean(var(phasesA2B))>0.5)
         disp('The phases of your estimates from A to B are a bit high (larger than 0.5 rad.), something is wrong.');
     end
@@ -118,20 +134,27 @@ if(paramsinitialized)
     tchanestsA2B=ifft(fchanestsA2B);
     
     %% ------- Do the B to A channel estimation ------- %%
-    HB2A=conj(Db2a_T.*repmat(Db2a_R,1,Nantb));
-    phasesB2A=unwrap(angle(HB2A));
-    %if(mean(var(phasesB2A))>0.5)
-    %    disp('The phases of your estimates from B to A are a bit high (larger than 0.5 rad.), something is wrong.');
-    %end
-    
     if (chanest_full)
-        chanestsB2A=zeros(301,Nantb);
+      HB2A=zeros(120*Nmeas/10,301,Nantb);
-        inds=repmat([1:Nantb]',1,301);
+      for t=1:120*Nmeas/10
         for ci=1:301;
-            data=Db2a_T(:,ci+[0:Nantb-1]*301);
+            data=Db2a_T((t-1)*10+1:t*10,ci+[0:Nantb-1]*301);
-            rec=Db2a_R(:,ci);
+            rec=Db2a_R((t-1)*10+1:t*10,ci);
-            chanestsB2A(ci,:)=(inv(data'*data)*data'*rec).';
+            HB2A(t,ci,:)=(inv(data'*data)*data'*rec).';
         end
+      end
+      phasesB2A=mod(angle(HB2A),2*pi);
+      phasesB2A=reshape(phasesB2A,[],301*Nantb);
+      if(mean(var(phasesB2A))>0.5)
+        disp('The phases of your estimates from B to A are a bit high (larger than 0.5 rad.), something is wrong.');
+      end
+    
+      chanestsB2A=zeros(301,Nantb);
+      for ci=1:301;
+        data=Db2a_T(:,ci+[0:Nantb-1]*301);
+        rec=Db2a_R(:,ci);
+        chanestsB2A(ci,:)=(inv(data'*data)*data'*rec).';
+      end
     else
         chanestsB2A=reshape(diag(Db2a_T'*repmat(Db2a_R,1,Nantb)/(Nmeas*60)),301,Nantb);
     end
@@ -144,10 +167,10 @@ if(paramsinitialized)
     tchanestsB2A=ifft(fchanestsB2A);
     
     %% -- Some plotting code -- %%  (you can uncomment what you see fit)
-    received = [receivedB2A(:,indA) receivedA2B(:,indB)];
+    received = [receivedA2B(:,indB) receivedB2A(:,indA)];
     phases = phasesB2A;
     tchanests = [tchanestsA2B(:,:,end), tchanestsB2A(:,:,end)];
-    fchanests = [fchanestsA2B(:,:,end), fchanestsB2A(:,:,end)];
+    fchanests = [chanestsA2B(:,:,end), chanestsB2A(:,:,end)];
     
     clf
     figure(1)
@@ -162,17 +185,26 @@ if(paramsinitialized)
     plot(t,20*log10(abs(tchanests)))
     xlabel('time')
     ylabel('|h|')
-    legend('A->B1','A->B2','A->B3','B1->A','B2->A','B3->A');
+    if Nantb==3
-    %legend('A->B1','A->B2','B1->A','B2->A');
+      legend('A->B1','A->B2','A->B3','B1->A','B2->A','B3->A');
-    
+    else
+      legend('A->B1','A->B2','B1->A','B2->A');
+    end
+
     figure(3)
     plot(20*log10(abs(fchanests)));
+    hold on
+    plot(squeeze(10*log10(mean(abs(noise_f(:,:,[indB indA])).^2,1))),'.');
+    hold off
     ylim([40 100])
     xlabel('freq')
     ylabel('|h|')
-    legend('A->B1','A->B2','A->B3','B1->A','B2->A','B3->A');
+    if Nantb==3
-    %legend('A->B1','A->B2','B1->A','B2->A');
+      legend('A->B1','A->B2','A->B3','B1->A','B2->A','B3->A','Noise B1','Noise B2','Noise B3','Noise A');
-    
+    else
+      legend('A->B1','A->B2','B1->A','B2->A','Noise B1','Noise B2','Noise A');
+    end
+
     if (0)
         figure(4)
         wndw = 50;
@@ -214,7 +246,8 @@ if(paramsinitialized)
     end
     axis([-2 2 -2 2])
 
-    disp(squeeze(mean(Fhatloc,1)));
+    %disp(squeeze(mean(Fhatloc,1)));
+    drawnow
     
 else
     error('You have to run init.params.m first!')

targets/PROJECTS/TDDREC/runmeas_mimo.m

@@ -33,7 +33,7 @@ if(paramsinitialized)
         if(indA(ia)==i)
             [tmpd, tmps]=genrandpskseq(N,M,amp);
             signalA2B(:,i)=tmps*2; %make sure LSB is 0 (switch=tx)
-            signalB2A(:,i)=repmat(1+1j,76800,1); %make sure LSB is 1 (switch=rx)
+            %signalB2A(:,i)=repmat(1+1j,76800,1); %make sure LSB is 1 (switch=rx)
 	    Da2b_T = [Da2b_T tmpd];
             if(length(indA)> ia) ia=ia+1; end
         end
@@ -52,7 +52,7 @@ if(paramsinitialized)
         if(indB(ib)==i)
             [tmpd, tmps]=genrandpskseq(N,M,amp);
             signalB2A(:,i)=tmps*2; %make sure LSB is 0 (switch=tx)
-            signalA2B(:,i)=repmat(1+1j,76800,1); %make sure LSB is 1 (switch=rx)
+            %signalA2B(:,i)=repmat(1+1j,76800,1); %make sure LSB is 1 (switch=rx)
             Db2a_T=[Db2a_T tmpd];
             if(length(indB)> ib) ib=ib+1; end
         end
@@ -144,13 +144,15 @@ if(paramsinitialized)
     fchanests = [fchanestsA2B(:,:,end), fchanestsB2A(:,:,end)];
     
     clf
+    if (0)
     figure(1)
     for i=1:size(received,2);
         subplot(220+i);
 	plot(20*log10(abs(fftshift(fft(received(:,i))))));
 	ylim([20 140])
     end
-    
+    end
+
     figure(2)
     t=[0:512-1]/512*1e-2;
     plot(t,20*log10(abs(tchanests)))
@@ -191,7 +193,34 @@ if(paramsinitialized)
         ylabel('phase variance')
     end
     
+    figure(4);
+    for t=1
+      i=1;
+      for m=1:Nanta
+	for n=1:Nantb
+	  subplot(Nanta,Nantb,i);
+	  plot(20*log10(abs(fchanestsB2A(:,m,n,t))))
+	  hold on
+	  plot(20*log10(abs(fchanestsA2B(:,m,n,t))),'r')
+	  ylim([0 80])
+	  i=i+1;
+	end
+      end
+    end
     
+    figure(5)
+    for t=1
+      for m=1:Nanta
+	  subplot(2,4,m);
+	  Rb2a_comp = repmat(chanestsB2A(:,m,m,t)',120,1).*Db2a_R(:,(m-1)*301+(1:301),t);
+	  plot(Rb2a_comp(:),'x');
+	  subplot(2,4,4+m);
+	  Ra2b_comp = repmat(chanestsA2B(:,m,m,t)',120,1).*Da2b_R(:,(m-1)*301+(1:301),t);
+	  plot(Ra2b_comp(:),'rx');
+      end
+    end
+
+    if (0)
     %% estimate F matrix assuming it is diagonal for sanity checking
     Fhatloc = zeros(Nmeas,301,Nanta,Nantb);
     for t=1:Nmeas
@@ -218,7 +247,8 @@ if(paramsinitialized)
     axis([-2 2 -2 2])
 
     %disp(squeeze(mean(Fhatloc,2)));
-    
+    end
+
 else
   error('You have to run init.params.m first!')
 end