guibene
84fb51d88c
git-svn-id: http://svn.eurecom.fr/openair4G/trunk@4306 818b1a75-f10b-46b9-bf7c-635c3b92a50f
23 lines
839 B
Matlab
Executable File
23 lines
839 B
Matlab
Executable File
function sig = OFDM_TX_FRAME(num_carriers,num_zeros,prefix_length,num_symbols_frame,preamble_length)
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% sig - output signal
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% sig_length - output signal length
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% num_carriers - number of sub-carriers
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% num_zeros - number of zero carriers minus 1 (DC)
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% prefix_length - length of cyclic prefix
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% num_symbols_frame - number of symbols per OFDM frame
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% preamble_length - length of 4-QAM preamble
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num_useful_carriers = num_carriers - num_zeros -1;
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sig = [];
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for k=1:preamble_length
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QAM4_preamble = QAM_MOD(4,floor(256*abs(rand(1,num_useful_carriers/4))));
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sig = [sig OFDM_TX(num_carriers,num_zeros,prefix_length,QAM4_preamble)];
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end
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for k=1:(num_symbols_frame - preamble_length)
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QAM_data = QAM_MOD(256,floor(256*abs(rand(1,num_useful_carriers))));
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sig = [sig OFDM_TX(num_carriers,num_zeros,prefix_length,QAM_data)];
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end
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