Patent Document ID: 20050105649
Application ID: 10936583
Patent Flag: 0

Claim One:
1. A receiver in an ultra-wideband wireless system that receives signals that are sent as a pulse waveform in code word units, taking a predetermined number of bits to be a unit for interleaved code words, wherein the receiver comprises: a pulse demapper that, based on an a posteriori probability decoding algorithm, calculates soft likelihood information for each bit from a priori information with respect to the sent pulse waveform and the received signals; a first interleaver that uses on a sending side an output from said pulse demapper to make an interleaving operation; a deinterleaver that makes a deinterleaving operation; a channel decoder that calculates likelihood information for each of code word bits and likelihood information for information bits, respectively, from deinterleaved likelihood information; a second interleaver that interleaves an output of the channel decoder with respect to said code words; and a feedback circuit that provides feedback to the pulse demapper, of an output of said second interleaver as an a priori probability for use in a second and subsequent iterations of decoding.