Rate-compatible irregular repeat-accumulate codes for DVB-SH applications
Rate-compatible irregular repeat-accumulate codes for DVB-SH applications
复制标题
适用于 DVB-SH 应用的速率兼容的不规则重复累积代码
DOI：
10.1109/iwssc.2008.4656798
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
D. Benmayor
中科院分区：
文献类型：
--
作者：
S. Papaharalabos;P. Mathiopoulos;G. Tsiropoula;P. Constantinou;D. Benmayor
本文提出了一种系统的速率兼容（RC）非规则重复累积（伊拉）低密度奇偶校验（LDPC）码族的数字视频广播卫星到手持（DVB-SH）的应用。对码率为1/3的优化伊拉母码进行删截和扩展，以获得全范围的码率。本文的主要贡献是一个简单的，但内存效率和模块化，扩展算法，以获得较低的码率，基于截断范德蒙矩阵。与以前发表的扩展方法相比，本文介绍的方法不使用密度演化分析，而是通过仅采用确定性结构中的循环数和单位矩阵来实现高达1/5的低速率代码。与标准化的第三代合作伙伴计划2（3GPP 2）turbo码相比，所提出的RC-IRA码具有较低的复杂度解码，这对于处理、功率和存储器受限的手持设备是有益的。在加性白色高斯噪声（AWGN）信道中，信息块长度k = 12282比特，对所提出的码族的性能进行了评估。计算机仿真结果表明，在较宽的码率范围内，所提出的RC-IRA码族的性能与3GPP 2 Turbo码非常接近，并且在误码率（FER）低于10-3、误码率（BER）低于10-5时，其性能优于3GPP 2 Turbo码，而码率R=1/5的情况除外.
This paper presents a systematic rate-compatible (RC) irregular repeat-accumulate (IRA) low-density parity check (LDPC) family of codes for digital video broadcasting-satellite to handheld (DVB-SH) applications. Puncturing and extending of an optimized IRA mother code of rate 1/3 are used to obtain the full range of code rates. The main contribution of this paper is a simple, yet memory-efficient and modular, extending algorithm to obtain the lower code rates, based on a truncated Vandermonde matrix. In contrast to previously published extending methods, the one introduced in this paper does not use density evolution analysis, but instead achieves lower rate codes up to 1/5, by employing solely circulants and identity matrices in a deterministic structure. Compared to the standardized 3rd generation partnership project 2 (3GPP2) turbo codes, the proposed RC-IRA codes feature lower complexity decoding, that is beneficial from processing, power and memory constrained handheld devices. The performance of the proposed family of codes is evaluated for the additive white Gaussian noise (AWGN) channel with information block length k = 12282 bits. Computer simulation results demonstrate that, for a wide range of rates, the proposed RC-IRA family of codes performs very close to the 3GPP2 turbo codes, and outperforms the 3GPP2 turbo codes when the latter exhibit an error-floor at FER below 10-3 and at at BER below 10-5, apart from the case of rate R=1/5.
影响因子：
2.5
作者：
Richardson, TJ;Urbanke, RL
通讯作者：
Urbanke, RL