Patent ID: 7382829

Claim:
A receiver in an ultra-wideband wireless system that performs bit-level interleaving on code words obtained from information bit sequences encoded with a channel code and receives pulse signals that are sent as a pulse waveform in interleaved code word units, the receiver comprising: a pulse demapper that, based on a posteriori probability decoding algorithm, pulse-level calculates soft likelihood information in the code word units for each bit from priori information with respect to the sent pulse waveform and the received pulse signals; a deinterleaver configured to receive an output from said pulse demapper to perform a deinterleaving operation; a channel decoder configured to decode channel code and likelihood information for each of code word bits and likelihood information for information bits, respectively, on a basis of deinterleaved likelihood information; an interleaver configured to interleave an output of the channel decoder with respect to said code words; and a feedback circuit configured to provide feedback to the pulse demapper, of an output of said interleaver as an a priori probability for use in a second and subsequent iterations of decoding the channel code.