tx_interleaver.m

ofdm simulation program.matlab

% Interleaver

function interleaved_bits = tx_interleaver(in_bits, sim_options)

global sim_consts;

interleaver_depth = sim_consts.NumDataSubc * get_bits_per_symbol(sim_options.Modulation);

num_symbols = length(in_bits)/interleaver_depth;

% Get interleaver pattern for symbols
single_intlvr_patt = tx_gen_intlvr_patt(interleaver_depth, sim_options);

% Generate intereleaver pattern for the whole packet
intlvr_patt = interleaver_depth*ones(interleaver_depth, num_symbols);
intlvr_patt = intlvr_patt*diag(0:num_symbols-1);
intlvr_patt = intlvr_patt+repmat(single_intlvr_patt', 1, num_symbols);
intlvr_patt = intlvr_patt(:);

% Perform interleaving
interleaved_bits(intlvr_patt) = in_bits;