NDLI: Polar Decomposition of Mutual Information Over Complex-Valued Channels

Content Provider	IEEE Xplore Digital Library
Author	Qiuliang Xie Zhaocheng Wang Zhixing Yang
Copyright Year	1963
Abstract	A polar decomposition of mutual information between a complex-valued channel's input and output is proposed for an input whose amplitude and phase are independent of each other. The mutual information is symmetrically decomposed into three terms: 1) an amplitude term; 2) a phase term; and 3) a cross term, where the cross term is negligible. Theoretical bounds of the amplitude and phase terms are derived for additive white Gaussian noise channels with Gaussian inputs. This decomposition is applied to amplitude phase shift keying with product constellation (product-APSK) design and analysis. It facilitates the product-APSK to achieve a considerable shaping gain at some interesting rates over conventional quadrature amplitude modulation with a similar low complexity.
Sponsorship	IEEE Information Theory Society
Starting Page	3163
Ending Page	3171
Page Count	9
File Size	811708
File Format	PDF
ISSN	00189448
Volume Number	60
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Signal to noise ratio Mutual information Quadrature amplitude modulation Approximation methods Phase shift keying Complexity theory Entropy coded modulation polar decomposition channel decomposition product-APSK
Content Type	Text
Resource Type	Article
Subject	Library and Information Sciences Information Systems Computer Science Applications

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