bugfixes - now works with dual carrier EMOS files
git-svn-id: http://svn.eurecom.fr/openair4G/trunk@5324 818b1a75-f10b-46b9-bf7c-635c3b92a50f
This commit is contained in:
Florian Kaltenberger
@@ -13,7 +13,6 @@ primary_synch; %loads the primary sync signal
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load('ofdm_pilots_sync_30MHz.mat');
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n_carriers = 2; % use 1 for UHF and 2 for 2.6GHz
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nframes = 100; % frames in one block
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symbols_per_slot = 6;
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slots_per_frame = 20;
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@@ -25,13 +24,18 @@ switch n_carriers
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%filename = 'E:\EMOS\corridor\trials1\eNB_data_20140331_UHF_run1.EMOS';
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filename = 'D:\trials1 train extracted\eNB_data_20140331_UHF_run1.EMOS';
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nframes = 100; % frames in one block
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threshold = 3e+4 ; % maybe should change that !!!!
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case 2,
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p(1) = init_params(50,2,4);
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p(2) = init_params(100,2,4);
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pss_t = upsample(primary_synch0_time,4*2); % this assumes we are doing the sync on the first carrier, which is 10MHz
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p(1) = init_params(100,2,4);
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p(2) = init_params(50,2,4);
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pss_t = upsample(primary_synch0_time,4*4); % this assumes we are doing the sync on the first carrier, which is 10MHz
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%filename = 'E:\EMOS\corridor\trials1\eNB_data_20140331_UHF_run1.EMOS';
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filename = 'D:\trials1 train extracted\eNB_data_20140331_2.6GHz_run1.EMOS';
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nframes = 50; % frames in one block
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threshold = 1e+4 ; % maybe should change that !!!!
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end
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destdir = 'E:\EMOS\corridor\trials1 train';
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@@ -54,9 +58,7 @@ block = 1;
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flag1 = 1;
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start=2;
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threshold = 3e+4 ; % maybe should change that !!!!
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fseek(fid,samples_slot_agg*slots_per_frame*nframes*120*2,'bof'); %advance 30 sec
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%fseek(fid,samples_slot_agg*slots_per_frame*nframes*120*2,'bof'); %advance 30 sec
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while ~feof(fid)
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fprintf(1,'Processing block %d of %d',block,nblocks);
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@@ -68,21 +70,21 @@ while ~feof(fid)
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v0 = double(v(1:2:end))+1j*double(v(2:2:end));
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v1 = zeros(p(1).samples_slot*slots_per_frame*nframes,p(1).nant_rx);
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if n_carriers==2
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v2 = zeros(p(2).samples_slot*slots_per_frame*nframes,p(2).nant_rx);
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end
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for slot=1:slots_per_frame*nframes
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for a=1:p(1).nant_rx
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v1((slot-1)*p(1).samples_slot+1:slot*p(1).samples_slot,a) = ...
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v0((slot-1)*samples_slot_agg+(a-1)*p(1).samples_slot+1:...
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(slot-1)*samples_slot_agg+ a *p(1).samples_slot,1);
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(slot-1)*samples_slot_agg+ a *p(1).samples_slot,1);
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end
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end
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if n_carriers==2
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v2 = zeros(p(2).samples_slot*slots_per_frame*nframes,p(2).nant_rx);
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for slot=1:slots_per_frame*nframes
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if n_carriers==2
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for a=1:p(2).nant_rx
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v2((slot-1)*p(2).samples_slot+1:slot*p(2).samples_slot,a) = ...
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v0((slot-1)*samples_slot_agg+(a-1)*p(2).samples_slot+1:...
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(slot-1)*samples_slot_agg+ a *p(2).samples_slot,1);
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v0((slot-1)*samples_slot_agg+p(1).nant_rx*p(1).samples_slot+(a-1)*p(2).samples_slot+1:...
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(slot-1)*samples_slot_agg+p(1).nant_rx*p(1).samples_slot+ a *p(2).samples_slot,1);
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end
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end
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end
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@@ -96,10 +98,10 @@ while ~feof(fid)
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end
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if n_carriers==2
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v2 = [vStorage1; v2] ;
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v2 = [vStorage2; v2] ;
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if size(v2,1) > p(2).frame_length*nframes ;
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nframes = floor(size(v2,1) / p(2).frame_length) ;
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vStorage1 = v2(p(2).frame_length*nframes+1:end,:) ;
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vStorage2 = v2(p(2).frame_length*nframes+1:end,:) ;
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v2(p(2).frame_length*nframes + 1 : end,:) = [] ;
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start = 1 ;
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end
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@@ -158,7 +160,7 @@ while ~feof(fid)
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fprintf(1,'.');
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frame_start1 = (slots_per_frame*p(1).samples_slot)*(i-1)+frame_offset+1;
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if n_carriers==2
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frame_start2 = (slots_per_frame*p(2).samples_slot)*(i-1)+frame_offset*2+1;
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frame_start2 = (slots_per_frame*p(2).samples_slot)*(i-1)+round(frame_offset/2)+1;
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end
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if i<nframes
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@@ -172,78 +174,81 @@ while ~feof(fid)
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if n_carriers==2
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vStorage2 = [v2(frame_start2:end,:) ; vStorage2]; %%
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end
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break
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end
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%% MIMO channel estimation
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if (n_carriers==1)
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transmit_f1 = f3;
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else
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transmit_f1 = f2;
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transmit_f2 = f1;
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transmit_f1 = f1;
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transmit_f2 = f2;
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end
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for carrier=1:n_carriers
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if (carrier==1)
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transmit_f = transmit_f1;
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received_f = received_f1;
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else
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transmit_f = transmit_f2;
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received_f = received_f2;
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end
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H = zeros(num_symbols_frame/2,p(carrier).useful_carriers/4,p(carrier).nant_tx,p(carrier).nant_rx);
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for itx=1:p(carrier).nant_tx
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% f_start and t_start indicate the start of the pilots in time
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% and frequency according to the specifications (see .doc file).
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% t_start has to be >=2, since the first symbol is the PSS.
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f_start = mod(itx-1,2)*2+1;
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t_start = floor((itx-1)/2)+1;
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for irx=1:p(carrier).nant_rx
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H(:,:,itx,irx)=conj(squeeze(transmit_f(itx,t_start:2:end,f_start:4:end))).*received_f(t_start:2:end,f_start:4:end,irx);
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if (carrier==1)
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transmit_f = transmit_f1;
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received_f = received_f1;
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else
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transmit_f = transmit_f2;
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received_f = received_f2;
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end
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end
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Ht = ifft(H,[],2);
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PDP = mean(abs(Ht).^2,1);
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PDP_all = squeeze(mean(mean(PDP,3),4));
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%PDP_total((block-1)*nframes+i+1,:,:,:) = PDP;
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if enable_plots>=1
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figure(3+2*(carrier-1))
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H = zeros(num_symbols_frame/2,p(carrier).useful_carriers/4,p(carrier).nant_tx,p(carrier).nant_rx);
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for itx=1:p(carrier).nant_tx
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for irx=1:p(1).nant_rx
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subplot(p(1).nant_tx,p(1).nant_rx,(itx-1)*p(1).nant_rx + irx);
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surf(20*log10(abs(Ht(:,:,itx,irx))))
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%xlabel('time [OFDM symbol]')
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%ylabel('delay time [samples]')
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%zlabel('power [dB]')
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shading interp
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% f_start and t_start indicate the start of the pilots in time
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% and frequency according to the specifications (see .doc file).
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% t_start has to be >=2, since the first symbol is the PSS.
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f_start = mod(itx-1,2)*2+1;
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t_start = floor((itx-1)/2)+1;
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for irx=1:p(carrier).nant_rx
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H(:,:,itx,irx)=conj(squeeze(transmit_f(itx,t_start:2:end,f_start:4:end))).*received_f(t_start:2:end,f_start:4:end,irx);
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end
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end
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figure(4+2*(carrier-1))
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for itx=1:p(1).nant_tx
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for irx=1:p(1).nant_rx
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subplot(p(1).nant_tx,p(1).nant_rx,(itx-1)*p(1).nant_rx + irx);
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plot(10*log10(PDP(:,:,itx,irx)))
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ylim([50 80])
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xlim([0 75])
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%xlabel('delay time [samples]')
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%ylabel('power [dB]')
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Ht = ifft(H,[],2);
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PDP = mean(abs(Ht).^2,1);
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PDP_all = squeeze(mean(mean(PDP,3),4));
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%PDP_total((block-1)*nframes+i+1,:,:,:) = PDP;
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if enable_plots>=1
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figure(3+2*(carrier-1))
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for itx=1:p(carrier).nant_tx
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for irx=1:p(1).nant_rx
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subplot(p(1).nant_tx,p(1).nant_rx,(itx-1)*p(1).nant_rx + irx);
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surf(20*log10(abs(Ht(:,:,itx,irx))))
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%xlabel('time [OFDM symbol]')
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%ylabel('delay time [samples]')
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%zlabel('power [dB]')
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shading interp
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end
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end
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figure(4+2*(carrier-1))
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for itx=1:p(1).nant_tx
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for irx=1:p(1).nant_rx
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subplot(p(1).nant_tx,p(1).nant_rx,(itx-1)*p(1).nant_rx + irx);
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plot(10*log10(PDP(:,:,itx,irx)))
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ylim([50 80])
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xlim([0 75])
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%xlabel('delay time [samples]')
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%ylabel('power [dB]')
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end
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end
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drawnow
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end
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if carrier==1
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% adjust frame offset base on channel estimate to compensate for
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% timing drift. We try to keep the peak of the impulse response at
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% sample prefix_length/8.
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[m,idx] = max(fft(ifft(PDP_all),p(carrier).num_carriers));
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offset = idx - p(carrier).prefix_length/8;
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if offset > p(carrier).prefix_length
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offset = offset - p(carrier).num_carriers;
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end
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if abs(offset) > 5
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frame_offset = frame_offset + round(offset/4);
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end
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end
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drawnow
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end
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end
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% adjust frame offset base on channel estimate to compensate for
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% timing drift. We try to keep the peak of the impulse response at
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% sample prefix_length/8.
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[m,idx] = max(fft(ifft(PDP_all),p(1).num_carriers));
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offset = idx - p(1).prefix_length/8;
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if offset > p(1).prefix_length
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offset = offset - p(1).num_carriers;
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end
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if abs(offset) > 5
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frame_offset = frame_offset + round(offset/4);
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end
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end
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