On adaptive BICM with finite block-length and simplified metrics calculation

A. Alvarado, H. Carrasco, R. Feick

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

13 Citations (Scopus)


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.
Original languageEnglish
Title of host publication2006 IEEE Vehicular Technology Conference (VTC-Fall)
Place of PublicationPiscataway
PublisherInstitute of Electrical and Electronics Engineers
Publication statusPublished - Sept 2006
Event64rd Vehicular Technology Conference (VTC 2006-Fall) - Hyatt Regency Montreal, Montreal, QC, Canada, Montreal, Canada
Duration: 25 Sept 200628 Sept 2006
Conference number: 64


Conference64rd Vehicular Technology Conference (VTC 2006-Fall)
Abbreviated titleVTC2006-Fall


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