From f68c1d824c0735438f3d640c8fd4d05bd3935633 Mon Sep 17 00:00:00 2001
From: Arvanita <arvanita@eurecom.fr>
Date: Tue, 8 Apr 2014 08:30:18 +0000
Subject: [PATCH] new version of emos_read_v2.m handles frame boundaries
git-svn-id: http://svn.eurecom.fr/openair4G/trunk@5232 818b1a75-f10b-46b9-bf7c-635c3b92a50f
---
targets/PROJECTS/CORRIDOR/emos_read_v2.m | 44 +++++++++++++++++-------
1 file changed, 32 insertions(+), 12 deletions(-)
diff --git a/targets/PROJECTS/CORRIDOR/emos_read_v2.m b/targets/PROJECTS/CORRIDOR/emos_read_v2.m
index 06a67d6a27..0ae8d90c23 100644
--- a/targets/PROJECTS/CORRIDOR/emos_read_v2.m
+++ b/targets/PROJECTS/CORRIDOR/emos_read_v2.m
@@ -15,8 +15,8 @@ ofdm_symbol_length = num_carriers + prefix_length;
frame_length = ofdm_symbol_length*num_symbols_frame;
useful_carriers = num_carriers-num_zeros-1;
-filename = 'E:\EMOS\corridor\lab tests\eNB_data_20140321_184441.EMOS';
-%filename = 'D:\711MHz\eNB_data_20140324_113931.EMOS';
+%filename = 'E:\EMOS\corridor\lab tests\eNB_data_20140321_184441.EMOS';
+filename = 'E:\EMOS\corridor\711MHz\eNB_data_20140324_113931.EMOS';
%filename = 'D:\trials1 day 1 771.5MHz\eNB_data_20140327_153151.EMOS';
destdir = 'E:\EMOS\corridor\trials1 day1\711.5MHz';
@@ -31,7 +31,12 @@ PDP_total = zeros(nblocks*nframes,useful_carriers/4);
%% main loop
fid = fopen(filename,'r');
+
+vStorage = []; %%
+
block = 1;
+start=2;
+
while ~feof(fid)
fprintf(1,'Processing block %d of %d',block,nblocks);
@@ -41,6 +46,8 @@ while ~feof(fid)
end
v1 = double(v(1:2:end))+1j*double(v(2:2:end));
+ nframes = 100;
+
v2 = zeros(samples_slot*slots_per_frame*nframes,nant);
for slot=1:slots_per_frame*nframes
for a=1:nant
@@ -50,13 +57,22 @@ while ~feof(fid)
end
end
+
+ v2 = [vStorage; v2] ;%%
+ if size(v2,1) > frame_length*nframes ;
+ nframes = floor(size(v2,1) / frame_length) ;
+ vStorage = v2(frame_length*nframes+1:end,:) ;
+ v2(frame_length*nframes + 1 : end,:) = [] ;
+ start = 1 ;
+ end
+
if enable_plots>=2
figure(1)
plot(20*log10(abs(fftshift(fft(v2)))))
end
%% frame start detection
- if block==1
+ % if block==1
[corr,lag] = xcorr(v2(:,1),pss_t);
%[m,idx]=max(abs(corr));
%[m,idx]=peaksfinder(corr,frame_length);
@@ -74,20 +90,24 @@ while ~feof(fid)
plot(frame_offset,m(1),'ro')
end
- start=2;
- else
- start=1;
- end
+
+
+ % end
+ %%
for i=start:nframes;
fprintf(1,'.');
frame_start = (slots_per_frame*samples_slot)*(i-1)+frame_offset+1;
%frame_start = lag(idx(i))-prefix_length;
% frame_start = lag(i) - prefix_length;
- %% ofdm receiver
- received_f = OFDM_RX(v2(frame_start:frame_start+frame_length,:),num_carriers,useful_carriers,prefix_length,num_symbols_frame);
+ if i<nframes
+ %% ofdm receiver
+ received_f = OFDM_RX(v2(frame_start:frame_start+frame_length,:),num_carriers,useful_carriers,prefix_length,num_symbols_frame);
+ else
+ vStorage = [v2(frame_start:end,:) ; vStorage]; %%
+ end
%% channel estimation
H=conj(squeeze(f3(1,3:2:end,1:4:end))).*received_f(3:2:end,1:4:end,1);
Ht = ifft(H,[],2);
@@ -100,14 +120,14 @@ while ~feof(fid)
offset = offset - num_carriers;
end
if abs(offset) > 5
- frame_offset = frame_offset + offset;
+ frame_offset = frame_offset + round(offset/4);
end
if enable_plots>=1
figure(3)
surf(20*log10(abs(Ht)))
- xlabel('time [OFDM symbol]')
- ylabel('delay time [samples]')
+ xlabel('delay time [samples]')
+ ylabel('time [OFDM symbol]')
zlabel('power [dB]')
shading interp
figure(4)
--
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