基于非线性信道预失真技术的TCM方案

[Conference Record] SUPERCOMM/ICC '92 Discovering a New World of Communications Pub Date : 1992-06-14 DOI:10.1109/ICC.1992.268206

A. Brajal, A. Chouly, K. Fazel

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引用次数: 4

摘要

讨论了在补偿非线性信道上运行的预失真栅格编码调制(TCM)方案的性能。补偿方法的选择既能平衡星座扭曲，又能减小符号间干扰。这是通过使用一个自适应过程来完成的，该过程包括在计算预失真点时系统内存的影响。利用线性信道的最优TCM方案，研究了采用16-QAM(正交调幅)信号星座时，补偿非线性信道和线性信道的编码增益是相同的。重点是比较不同编码和几种预失真方法得到的结果，以便研究可达到的性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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TCM schemes with predistortion techniques on nonlinear channels

The performance of predistorted trellis-coded modulation (TCM) schemes operating over a compensated nonlinear channel is discussed. Compensation methods are chosen in such a way that constellation warping is balanced and intersymbol interference is reduced. This is done by using an adaptive process that includes the effects of the system memory in the computation of predistorted points. Using optimal TCM schemes for a linear channel it is shown that the same coding gains can be achieved on a compensated nonlinear channel and on a linear channel when the 16-QAM (quadrature amplitude modulation) signal constellation is used. The focus is on the comparison of the results obtained for different codes and several predistortion methods in such a way so that the attainable performance can be studied.<>

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[Conference Record] SUPERCOMM/ICC '92 Discovering a New World of Communications

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