短低速率非二进制涡轮码

G. Liva, B. Matuz, E. Paolini, M. Chiani
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引用次数: 2

摘要

介绍并分析了外部非二进制turbo码与内部不同二进制码的串行连接。turbo码是基于高阶域的内存-1时变递归卷积码。所得到的编码具有低速率和接近容量的性能,因此代表了扩频通信的一种有吸引力的解决方案。通过密度演化分析,研究了该方案在具有相干和非相干检测的加性高斯白噪声信道上的性能。在复杂性/性能权衡方面,建议的代码与其他低速率结构相比具有优势。低误差层和接近球体封装边界的性能可以实现小块大小(k =192信息位)。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Short low-rate non-binary turbo codes
A serial concatenation of an outer non-binary turbo code with different inner binary codes is introduced and analyzed. The turbo code is based on memory-1 time-variant recursive convolutional codes over high order fields. The resulting codes possess low rates and capacity-approaching performance, thus representing an appealing solution for spread spectrum communications. The performance of the scheme is investigated on the additive white Gaussian noise channel with coherent and noncoherent detection via density evolution analysis. The proposed codes compare favorably w.r.t. other low rate constructions in terms of complexity/performance trade-off. Low error floors and performances close to the sphere packing bound are achieved down to small block sizes (k =192 information bits).
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