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Bit and Co-ordinate Interleaved Coded Modulation

Khan, Md Zafar Ali and Rajan, Sundar B (2000) Bit and Co-ordinate Interleaved Coded Modulation. In: IEEE Global Telecommunications Conference, 2000. GLOBECOM '00, 27 November-1 December, San Francisco, Vol.3, 1595-1599.

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Abstract

The diversity order is crucial for the performance of communication systems over fading channels. It has been shown by Zehavi (1992) that the diversity and hence performance of coded modulation over fading channels can be improved by bit-wise interleaving at the encoder output, and by using an appropriate soft decision metric as an input to the Viterbi decoder. A related approach is coordinate interleaving whereby the signal space coordinates are interleaved before transmission. In this paper we combine both bit interleaving and coordinate interleaving to increase the diversity order. The resulting system is referred to here as bit and coordinate interleaved coded modulation (BCICM). The pairwise probability of error is also derived, which shows that by proper design the diversity order can be doubled over bit interleaved coded modulation (BICM), for two dimensional signal sets. Simulation results for rate 2/3, 4-state 8-PSK coded modulation schemes show that BCICM significantly outperforms all known coded modulation (symbol or bit interleaved) schemes.

Item Type: Conference Paper
Additional Information: Copyright 1990 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited: 08 Feb 2007
Last Modified: 19 Sep 2010 04:24
URI: http://eprints.iisc.ernet.in/id/eprint/5698

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