tx_make_int_num_ofdm_syms.m

OFDM系统的仿真代码MATLAB环境下

function out_bits = tx_make_int_num_ofdm_syms(tx_bits)

global sim_consts;

n_tx_bits = length(tx_bits);

n_syms = sim_consts.NumDataSubc;
n_bits_per_sym = get_bits_per_symbol(sim_consts.Modulation);
n_ofdm_syms = ceil(n_tx_bits/(n_syms*n_bits_per_sym));

% if Radon Hurwitz transform is used we need an even number of OFDM symbols
if sim_consts.UseTxDiv==1
   if rem(n_ofdm_syms,2) ~= 0
      n_ofdm_syms = n_ofdm_syms + 1;
   end
end

pad_bits = floor(rand(1,n_ofdm_syms*n_syms*n_bits_per_sym - n_tx_bits)*2);
out_bits = [tx_bits  pad_bits];