Towards Fully Optimized BICM Transceivers
Artikel i vetenskaplig tidskrift, 2011

Bit-interleaved coded modulation (BICM) transceivers often use equally spaced constellations and a random interleaver. In this paper, we propose a new BICM design, which considers hierarchical (nonequally spaced) constellations, a bit-level multiplexer, and multiple interleavers. It is shown that this new scheme increases the degrees of freedom that can be exploited in order to improve its performance. Analytical bounds on the bit error rate (BER) of the system in terms of the constellation parameters and the multiplexing rules are developed for the additive white Gaussian Noise (AWGN) and Nakagami-m fading channels. These bounds are then used to design the BICM transceiver. Numerical results show that, compared to conventional BICM designs, and for a target BER of 10^-6, gains up to 3 dB in the AWGN channel are obtained. For fading channels, the gains depend on the fading parameter, and reach 2 dB for a target BER of 10^-7 and m=5.

nonequally spaced constellations

multiple interleavers

interleaver design

Bit-interleaved coded modulation

pulse amplitude modulation

trellis coded modulation

quadrature amplitude modulation

bit error rate

L-values

Författare

Md. Jahangir Hossain

Alex Alvarado

Chalmers, Signaler och system, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

Leszek Szczecinski

IEEE Transactions on Communications

0090-6778 (ISSN)

Vol. 59 11 3027-3039

Styrkeområden

Informations- och kommunikationsteknik

Ämneskategorier

Telekommunikation

DOI

10.1109/TCOMM.2011.091411.100746