Superposition modulation: myths and facts
Superposition modulation: myths and facts
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DOI：
10.1109/mcom.2011.6094014
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发表时间：
2011-12
影响因子：
11.2
通讯作者：
P. Hoeher;Tianbin Wo
中科院分区：
文献类型：
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作者：
P. Hoeher;Tianbin Wo
传统的数字调制方案是双射的（即信号星座点是不相交的），并且映射是唯一的。直到最近才发现，当与合适的信道编码和迭代处理结合使用时，非双射调制方案可能优于双射调制方案。在这个深入的教程中，我们澄清关于非双射调制的神话和事实。重点是叠加调制（SM）。在没有主动信号整形的情况下，SM在更低的接收机复杂度下优于带有PSK或方形QAM调制的位交错编码调制。
Traditionally, digital modulation schemes are bijective (i.e., the signal constellation points are disjunct), and the mapping is unique. Only recently it has been discovered that non-bijective modulation schemes may outperform bijective modulation schemes when employed in conjunction with suitable channel coding and iterative processing. In this in-depth tutorial, we clarify myths and facts about non-bijective modulation. Emphasis is on superposition modulation (SM). Without active signal shaping, SM outperforms bit-interleaved coded modulation with PSK or square QAM modulation at even lower receiver complexity.