EXIT chart-aided adaptive coding for MMSE turbo equalization with multilevel BICM

• Published in: IEEE communications letters Vol. 10; no. 6; pp. 486 - 488
• Main Authors: Ibi, S., Matsumoto, T., Sampei, S., Morinaga, N.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01-06-2006; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Adaptive coding; Adaptive equalizers; Applied sciences; Automatic repeat request; Binary sequences; Channels; Character generation; Coding; Coding, codes; Detection, estimation, filtering, equalization, prediction; Equalization; Exact sciences and technology; Information rates; Information, signal and communications theory; Interleaved codes; Mathematical models; Modulation; Modulation coding; Multilevel; Quadrature amplitude modulation; Receivers; Signal and communications theory; Signal, noise; Telecommunications and information theory; Throughput; Interference suppression; EXIT analysis; Turbo equalization; Frequency domain method; soft interference cancellation; Turbo code; Equalization; frequency domain MMSE equalization; Modulation coding; Adaptive coding; Mean square error
• ISSN: 1089-7798; 1558-2558
• DOI: 10.1109/LCOMM.2006.1638624

This letter proposes adaptive coding (AC) for multilevel bit interleaved coded modulation (ML-BICM) with MMSE turbo equalization, of which aim is to minimize the information rate loss due to the mismatch between the channel realization and channel coding. With the aid of the knowledge about extrinsic information transfer (EXIT) characteristics at the receiver, the code parameters such as code rates and/or generator polynomials are adaptively selected independently in each the ML-BICM layer. Numerical results show that throughput efficiency can be significantly improved with the proposed AC technique over the automatic repeat request (ARQ) technique with fixed code rate