On Adaptive BICM with Finite Block-Length and Simplified Metrics Calculation
Paper in proceeding, 2006

In this paper we present a novel performance analysis of bit-interleaved coded modulation (BICM) over AWGN channel for different modulation schemes considering a finite block length and suboptimal metrics calculation. Using the known BICM capacity analysis as well as the Gallager bound, we show that among many known modulations, only three M-ary quadrature amplitude modulation (QAM) are necessary to ensure the maximization of the channel capacity. We analyze the maximum throughput and the switching thresholds of the system, and we compare the theoretical analysis with simulation results of practical strong codes, i.e., turbo codes. We show that if the modulation and code are well adapted, the optimal throughput decreases by less than 1% when suboptimal metrics are used. We show also, that the turbo codes throughput is within 1.5 dB of the new bound, and the SNR switching thresholds, are shifted by 1.5 dB with respect to the theoretical analysis.

Author

Alex Alvarado

Chalmers, Signals and Systems, Communication, Antennas and Optical Networks

Hector Carrasco

Rodolfo Feick

IEEE Vehicular Technology Conference 2006, VTC-2006 Fall

Areas of Advance

Information and Communication Technology

Subject Categories

Telecommunications

DOI

10.1109/VTCF.2006.394

More information

Created

10/8/2017