?? ifft_cp_tx_blk.m
字號(hào):
function ofdm_symbol = ifft_cp_tx_blk(inp_symbol,num_subc,guard_interval)
%-----------------------------------------------------------
%每個(gè)傳輸模塊的IFFT和循環(huán)前綴
%-------------------------
%輸入:
% inp_symbol ----所有子載波的輸入符號(hào)
% num_subc ----子載波數(shù)
% guard_interval ----OFDM符號(hào)的保護(hù)間隔
%輸出:
% ofdm_symbol ----加入IFFT和保護(hù)前綴的OFDM符號(hào)
%----------------------------
ofdm_symbol = ifft(inp_symbol,num_subc);
if(guard_interval>length(ofdm_symbol))
error('The guard interval is greater than the ofdm symbol duration');
end
%The guard symbol is the copy of the end of the ofdm symbol to the
%beginning of the ofdm symbol
guard_symbol = ofdm_symbol(end-guard_interval+1:end);
%Add the cyclic prefix to the ofdm symbol
ofdm_symbol = [guard_symbol ofdm_symbol];
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