Angle differential-QAM scheme for resolving phase ambiguity in continuous transmission system

被引：21

作者：

Hwang, Jeng-Kuang ^{[1
]}

Chiu, Yu-Lun ^{[1
]}

Liao, Chia-Shu ^{[1
]}

机构：

[1] Yuan Ze Univ, Inst Commun Engn, Commun Signal Proc Lab, Jhongli 32026, Taiwan

来源：

INTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS | 2008年 / 21卷 / 06期

关键词：

differential coding scheme; square QAM; continuous transmission system; phase ambiguity; Rayleigh fading; performance analysis;

D O I：

10.1002/dac.914

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

An angle differential quadrature amplitude modulation (ADQAM) scheme is proposed to solve phase ambiguity problem in non-data-aided continuous transmission system with square QAM constellation. Starting from the 16-ADQAM case, we derive differential encoding and decoding schemes in terms of two differential angles and use a solar system analogy for explanation. The 16-ADQAM system incurs only about 0.5-dB performance degradation compared with the coherent 16-QAM system under AWGN channel. Generalization of flat fading channel and higher-level ADQAM is straightforward. Copyright (C) 2007 John Wiley & Sons, Ltd.

引用

页码：631 / 641

页数：11

共 8 条

[1]

[Anonymous], 300744 ETSI EN

[2] A useful integral for wireless communication theory and its application to rectangular signaling constellation error rates [J].