Cedric Roux
56c66c09aa
Pre-ci test passed git-svn-id: http://svn.eurecom.fr/openair4G/trunk@4000 818b1a75-f10b-46b9-bf7c-635c3b92a50f
48 lines
1.1 KiB
Matlab
48 lines
1.1 KiB
Matlab
clear all
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close all
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fd = fopen('rx_frame.dat','r');
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temp = fread(fd,'int16');
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fclose(fd);
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rxs = temp(1:2:length(temp)) + sqrt(-1)*temp(2:2:length(temp));
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rxs = reshape(rxs,[],2);
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%rxs = rxs(:,1);
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% estimate frequency offset (for a fs/4 signal)
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fs = 7680e3;
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s_phase = unwrap(angle(rxs(1:4:length(rxs),1).'));
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s_phase2 = unwrap(angle(rxs(1:4:length(rxs),2).'));
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s_phase = s_phase - s_phase(1,1);
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s_phase2 = s_phase2 - s_phase2(1,1);
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f_off = mean(s_phase(2:length(s_phase))*fs/4./(1:(length(s_phase)-1))/2/pi)
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f_off2 = mean(s_phase2(2:length(s_phase2))*fs/4./(1:(length(s_phase2)-1))/2/pi)
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figure(1)
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plot(real(rxs))
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print('rx_frame_time.esp','-depsc2')
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figure(2)
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plot(20*log10(abs(fftshift(fft(rxs)))))
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print('rx_frame_freq.esp','-depsc2')
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%%
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fd = fopen('tx_frame.dat','r');
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temp = fread(fd,'uint8');
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fclose(fd);
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%txs(:,1) = temp(1:4:length(temp)) + sqrt(-1)*temp(2:4:length(temp));
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%txs(:,2) = temp(3:4:length(temp)) + sqrt(-1)*temp(4:4:length(temp));
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load('../../PHY/LTE_REFSIG/mod_table.mat')
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for i=1:length(temp)
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txs(i) = table(temp(i)+1);
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end
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figure(3)
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plot(real(txs))
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