基于TCM的瑞利衰落级联编码和ARQ系统

Proceedings of ICC/SUPERCOMM'94 - 1994 International Conference on Communications Pub Date : 1994-05-01 DOI:10.1109/ICC.1994.369031

C. Tellambura, V. Bhargava

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引用次数: 2

摘要

网格编码调制(TCM)方案可以与串联编码或自动重复请求(ARQ)系统结合使用。本文讨论了这种混合方案在瑞利衰落信道下的性能。假定衰落相对于符号速率是缓慢的。当使用导频音调来估计信道增益时，以及当修改维特比解码算法以便生成侧信息以擦除符号或请求重传时，开发了新的近似误差表达式。

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Concatenated coding and ARQ systems using TCM for Rayleigh fading

Trellis coded modulation (TCM) schemes can be employed in conjunction with concatenated coding or automatic-repeat-request (ARQ) systems. The performance of such hybrid schemes operating in Rayleigh fading channels is addressed in the paper. The fading is assumed to be slow with respect to the symbol rate. New approximate error expressions are developed when a pilot tone is used to estimate the channel gain, and when the Viterbi decoding algorithm is modified such that side information can be generated to erase symbols or request retransmission.<>

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Proceedings of ICC/SUPERCOMM'94 - 1994 International Conference on Communications

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