Florian Kaltenberger
18e4f19e54
git-svn-id: http://svn.eurecom.fr/openair4G/trunk@5084 818b1a75-f10b-46b9-bf7c-635c3b92a50f
33 lines
1.3 KiB
Matlab
33 lines
1.3 KiB
Matlab
%addpath('../../../openair1/SIMULATION/LTE_PHY/')
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%addpath('../../../openair1/PHY/LTE_ESTIMATION/')
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%addpath('../../../openair1/PHY/LTE_REFSIG/')
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%addpath('../../../targets/ARCH/EXMIMO/USERSPACE/OCTAVE')
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nb_rb = 100; %this can be 25, 50, or 100
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num_carriers = 2048/100*nb_rb;
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num_zeros = num_carriers-(12*nb_rb+1);
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prefix_length = num_carriers/4; %this is extended CP
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num_symbols_frame = 120;
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preamble_length = 120;
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% this generates one LTE frame (10ms) full of OFDM modulated random QPSK
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% symbols
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[s,f] = OFDM_TX_FRAME(num_carriers,num_zeros,prefix_length,num_symbols_frame,preamble_length);
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% scale to conserve energy (Matlabs IFFT does not scale)
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s=s*sqrt(num_carriers);
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% load the LTE sync sequence, upsample it to the right frequency and insert
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% it in the first symbol of the frame
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primary_synch;
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pss0_up = interp(primary_synch0_time,num_carriers/128);
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pss0_up_cp = [pss0_up(num_carriers-prefix_length+1:end) pss0_up];
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s(1:num_carriers+prefix_length) = pss0_up_cp;
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plot(abs(s))
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% save for later use (channel estimation and transmission with the SMBV)
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save(sprintf('ofdm_pilots_sync_%d.mat',num_carriers),'-v7','s','f','num_carriers','num_zeros','prefix_length','num_symbols_frame','preamble_length');
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mat2wv(s, sprintf('ofdm_pilots_sync_%d.wv',num_carriers), 30.72e6/2048*num_carriers, 1)
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