标题: | 位元交错调变码之效能分析 Tight Performance Upper Bounds for Bit Interleaved Coded QAM Modulation with Gray Labeling |
作者: | 黄亮维 Liang-Wei Huang 沈文和 Wern-Ho Sheen 电信工程研究所 |
关键字: | 位元交错调变码;灰色编码;回旋码;效能分析;瑞雷衰退通道;Bit-interleaved coded modulation;gray labeling;convolutional code;BER upper bounds;Rayleigh fading channels;BICM |
公开日期: | 2003 |
摘要: | 位元交错调变码(BICM)保有篱笆码之有效利用频宽之特性,并拥有更多的分集阶数,所以广泛的应用在瑞雷衰退通道中,在本篇论文中,我们推导了位元交错调变码在加成性白色高斯杂讯通道与瑞雷衰退通道的系统效能分析,我们同时考虑了软式与硬式解码器。有鉴于灰色编码的QAM调变在位元交错调变码拥有最佳的系统效能,我们特别针对它应用在位元交错调变码使用随机标签位址(BICM-RLP)与位元交错调变码使用固定标签位址(BICM-FLP)这两种架构提出一个更精准的分析。在使用软式解码器的BICM-RLP架构中,我们的分析比前人的精准,另一方面,BICM-FLP的架构则是全新的分析。 Bit-interleaved coded modulation (BICM) is a bandwidth-efficient scheme with a diversity order higher than the Ungerboeck’s trellis-coded modulation over fading channels. In this thesis, we investigate the performance of punctured BICM with soft and hard decoding over additive white Gaussian and Rayleigh fading channels. Tight BER upper bounds are derived for QAM constellation with gray labeling, which is known to have the best performance and constitutes a large portion of the practical applications of BICM systems. Both BICM with random (BICM-RLP) and fixed label position (BICM-FLP) mapping are analyzed. For BICM-RLP with soft decoding, the new upper bound is tighter than the well-known BICM Union and the Expurgated Bound proposed in [4]. The tight upper bounds for hard decision and for BICM-FLP with soft decision are newly derived results. |
URI: | http://140.113.39.130/cdrfb3/record/nctu/#GT009113501 http://hdl.handle.net/11536/45846 |
显示于类别: | Thesis |
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