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added noise estimation

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git-svn-id: http://svn.eurecom.fr/openair4G/trunk@6127 818b1a75-f10b-46b9-bf7c-635c3b92a50f
This commit is contained in:
Florian Kaltenberger
2014-11-29 18:08:33 +00:00
parent 9f24176653
commit a86bd0f9b0
1 changed files with 57 additions and 34 deletions
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targets/PROJECTS/CORRIDOR/emos_read_v2.m
+57 -34
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@@ -4,7 +4,7 @@ clear all
global symbols_per_slot slots_per_frame;
enable_plots=0; %enables figures
record=1; %put 1 to enable the video record of the delay doppler profile
record=0; %put 1 to enable the video record of the delay doppler profile
%% preload and init data
addpath('../../../openair1/PHY/LTE_REFSIG');
primary_synch; %loads the primary sync signal
@@ -12,8 +12,8 @@ primary_synch; %loads the primary sync signal
%load('E:\EMOS\corridor\ofdm_pilots_sync_2048_v7.mat');
load('ofdm_pilots_sync_30MHz.mat');
n_carriers = 1; % use 1 for UHF and 2 for 2.6GHz
n_trials=1;%use 1 for trial1 and 2 for trial2
n_carriers = 2; % use 1 for UHF and 2 for 2.6GHz
n_trials=2;%use 1 for trial1 and 2 for trial2
n_run=1;
symbols_per_slot = 6;
slots_per_frame = 20;
@@ -23,11 +23,11 @@ switch n_carriers
p = init_params(25,3,4); %this can be 25, 50, or 100
pss_t = upsample(primary_synch0_time,4);
%filename = 'E:\EMOS\corridor\trials1\eNB_data_20140331_UHF_run1.EMOS';
filename = 'E:/byiringi/emosFiles/trials1/eNB_data_20140331_UHF_run1.EMOS';
%filename = 'E:/byiringi/emosFiles/trials1/eNB_data_20140331_UHF_run2.EMOS';
%filename = 'E:/byiringi/emosFiles/trials2/eNB_data_UHF_20140519_run4.EMOS';
%filename = 'E:/byiringi/emosFiles/trials2/eNB_data_UHF_20140519_run4.EMOS';
if n_trials==1
filename = sprintf('F:\\trials1 train extracted\\eNB_data_20140331_UHF_run%d.EMOS',n_run);
else
filename = sprintf('F:\\trials2 train extracted\\eNB_data_UHF_20140519_run%d.EMOS',n_run);
end
nframes = 100; % frames in one block
threshold = 3e+4 ; % maybe should change that !!!!
@@ -36,16 +36,17 @@ switch n_carriers
p(2) = init_params(50,2,4);
pss_t = upsample(primary_synch0_time,4*4); % this assumes we are doing the sync on the second carrier, which is 10MHz
%filename = 'E:\EMOS\corridor\trials1\eNB_data_20140331_UHF_run1.EMOS';
filename = 'E:/byiringi/emosFiles/trials1/eNB_data_20140331_2.6GHz_run1.EMOS';
%filename = 'E:\EMOS\corridor\trials2\eNB_data_20140519_2.6GHz_run2.EMOS';
%filename = 'E:/byiringi/emosFiles/trials2/eNB_data_20140519_2.6GHz_run4.EMOS';
if (n_trials==1)
filename = sprintf('F:\\trials1 train extracted\\eNB_data_20140331_2.6GHz_run%d.EMOS',n_run);
else
filename = sprintf('F:\\trials2 train extracted\\eNB_data_20140519_2.6GHz_run%d.EMOS',n_run);
end
nframes = 50; % frames in one block
threshold = 3e+4 ; % maybe should change that !!!!
end
destdir = '/home/byiringi/';
destdir = 'E:\EMOS\corridor\tmp';
% derived parameters
samples_slot_agg = sum([p.nant_rx].*[p.samples_slot]);
@@ -187,7 +188,7 @@ flag1 = 1;
start = 1; % Maybe 2; if it works with 1, then the variable is useless
%fseek(fid,samples_slot_agg*slots_per_frame*nframes*120*2,'bof'); %advance 30 sec
%fseek(fid,samples_slot_agg*slots_per_frame*nframes*60*2,'bof'); %advance 30 sec
NFRAMES = 100;
if(n_carriers==2)
NFRAMES=50;
@@ -199,6 +200,15 @@ if n_carriers==2
open(delay_doppler_profile_videob);
end
noise1 = zeros(nblocks*NFRAMES,p(1).nant_rx);
if n_carriers==2
noise2 = zeros(nblocks*NFRAMES,p(2).nant_rx);
end
H_power1 = zeros(nblocks*NFRAMES,p(1).nant_tx,p(1).nant_rx);
if n_carriers==2
H_power2 = zeros(nblocks*NFRAMES,p(2).nant_tx,p(2).nant_rx);
end
while ~feof(fid)
@@ -276,9 +286,9 @@ while ~feof(fid)
if flag1==1
[corr,lag] = xcorr(v1(:,1),pss_t);
if(n_carriers==2)
[corrb,lag] = xcorr(v2(:,1),pss_t);
end
% if(n_carriers==2)
% [corrb,lagb] = xcorr(v2(:,1),pss_t);
% end
%[m,idx]=max(abs(corr));
%[m,idx]=peaksfinder(corr,frame_length);
@@ -286,11 +296,12 @@ while ~feof(fid)
tmp = corr(nframes*slots_per_frame*p(1).samples_slot:end);
tmp2 = reshape(tmp,slots_per_frame*p(1).samples_slot,nframes);
[m,idx] = max(abs(tmp2),[],1);
if(n_carriers==2)
tmp = corrb(nframes*slots_per_frame*p(2).samples_slot:end);
tmp2 = reshape(tmp,slots_per_frame*p(2).samples_slot,nframes);
[m,idx] = max(abs(tmp2),[],1);
end
% if(n_carriers==2)
% tmp = corrb(nframes*slots_per_frame*p(2).samples_slot:end);
% tmp2 = reshape(tmp,slots_per_frame*p(2).samples_slot,nframes);
% [m,idx] = max(abs(tmp2),[],1);
% end
idx(m < threshold) = [];
if size(idx,2) <= 3
@@ -310,9 +321,9 @@ while ~feof(fid)
end
frame_offset = round(median(idx)) - p(1).prefix_length;
if(n_carriers==2)
frame_offset = round(median(idx)) - p(2).prefix_length;
end
% if(n_carriers==2)
% frame_offset = round(median(idx)) - p(2).prefix_length;
% end
if enable_plots>=2
@@ -350,17 +361,13 @@ while ~feof(fid)
max1=0;%variable containing a maximum
end
disp(nframes);
disp(start);
for i=start:nframes;
fprintf(1,'.');
frame_start1 = (slots_per_frame*p(1).samples_slot)*(i-1)+frame_offset+1;
if n_carriers==2
% frame_start2 = (slots_per_frame*p(2).samples_slot)*(i-1)+round(frame_offset/2)+1;
frame_start1 = (slots_per_frame*p(1).samples_slot)*(i-1)+2*frame_offset+1;
frame_start2 = (slots_per_frame*p(2).samples_slot)*(i-1)+frame_offset+1;
frame_start2 = (slots_per_frame*p(2).samples_slot)*(i-1)+round(frame_offset/2)+1;
end
if i<nframes
@@ -378,6 +385,15 @@ while ~feof(fid)
%break
end
%disp(i);
%% noise estimation
noise1((block-1)*NFRAMES+i,:) = squeeze(10*log10(mean(abs(received_f1(1,61:end-60,:)).^2)));
if (n_carriers==2)
noise2((block-1)*NFRAMES+i,:) = squeeze(10*log10(mean(abs(received_f2(1,61:end-60,:)).^2)));
end
%% MIMO channel estimation
if (n_carriers==1)
transmit_f1 = f3;
@@ -406,10 +422,17 @@ while ~feof(fid)
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);
end
end
Ht = ifft(H,[],2); %impulse response
if (carrier==1)
H_power1((block-1)*NFRAMES+i,:,:) = 10*log10(mean(mean(abs(H).^2,1),2));
else
H_power2((block-1)*NFRAMES+i,:,:) = 10*log10(mean(mean(abs(H).^2,1),2));
end
Ht = ifft(H,[],2)*sqrt(size(H,2)); %impulse response
PDP = mean(abs(Ht).^2,1);
PDP_all = squeeze(mean(mean(PDP,3),4));
PDD=sum(abs(fftshift(fft(Ht,[],1))).^2,2);
PDD=sum(abs(fftshift(fft(Ht,[],1)/sqrt(size(Ht,1)))).^2,2);
if(carrier==1)
PDP_totala((block-1)*NFRAMES+i,:,:,:) = PDP;
@@ -985,10 +1008,10 @@ fclose(fid);
%% save processed data
[path,name,ext]=fileparts(filename);
if(n_carriers==1)
save([name '.mat'],'PDP_totala','PDD_totala','mean_delay_a','mean_doppler_shift_a','doppler_freq_of_max_a','delay_doppler_profile_beforea','delay_doppler_profile_duringa','delay_doppler_profile_aftera');
save([name '.mat'],'PDP_totala','PDD_totala','mean_delay_a','mean_doppler_shift_a','doppler_freq_of_max_a','delay_doppler_profile_beforea','delay_doppler_profile_duringa','delay_doppler_profile_aftera','noise1','H_power1');
end
if(n_carriers==2)
save([name '.mat'],'PDP_totala','PDD_totala','mean_delay_a','mean_doppler_shift_a','doppler_freq_of_max_a','delay_doppler_profile_beforea','delay_doppler_profile_duringa','delay_doppler_profile_aftera','PDP_totalb','PDD_totalb','mean_delay_b','mean_doppler_shift_b','doppler_freq_of_max_b','delay_doppler_profile_beforeb','delay_doppler_profile_duringb','delay_doppler_profile_afterb');
save([name '.mat'],'PDP_totala','PDD_totala','mean_delay_a','mean_doppler_shift_a','doppler_freq_of_max_a','delay_doppler_profile_beforea','delay_doppler_profile_duringa','delay_doppler_profile_aftera','PDP_totalb','PDD_totalb','mean_delay_b','mean_doppler_shift_b','doppler_freq_of_max_b','delay_doppler_profile_beforeb','delay_doppler_profile_duringb','delay_doppler_profile_afterb','noise1','H_power1','noise2','H_power2');
end