Superposition mapping with adaptive bit loading for BICM-OFDM systems
Superposition mapping with adaptive bit loading for BICM-OFDM systems
复制标题
BICM-OFDM 系统的具有自适应比特加载的叠加映射
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
P. Hoeher
中科院分区：
文献类型：
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作者：
Zhenyu Shi;Tianbin Wo;P. Hoeher
叠加映射是一种新发展的非双射调制格式[1]、[2]。通过叠加一定数量的二进制符号，SM能够形成一个类似高斯的星座，该星座有可能接近信道容量界限。与PSK和QAM等传统的双射映射方案相比，SM确实具有一些独特的性能特征。本文结合BICM-ofdm，研究了SM在多径衰落信道中的性能。此外，为了充分利用信道的分集特性，提出了一种基于SM的BICM-ofdm系统的充水算法。
Superposition mapping (SM) is a newly evolved non-bijective modulation format [1], [2]. By superimposing a certain number of the binary symbols, SM is able to form a Gaussian-like constellation which has the potential to approach the channel capacity bound. Compared to conventional bijective mapping schemes such as PSK and QAM, SM does have some unique performance characteristics. In conjunction with BICM-OFDM, in this paper we investigate the performance of SM over multipath fading channels. Furthermore, a water-filling algorithm is proposed for BICM-OFDM with SM in order to exploit the diversity of the channel.