Channel Estimation and Training Design for Two-Way Relay Networks in Time-Selective Fading Environments

被引：85

作者：

Wang, Gongpu ^{[1
]}

Gao, Feifei ^{[2
,3
]}

Chen, Wen ^{[4
,5
,6
]}

Tellambura, Chintha ^{[1
]}

机构：

[1] Univ Alberta, Dept Elect & Comp Engn, Edmonton, AB T6G 2V4, Canada

[2] Tsinghua Univ, Dept Automat, Beijing 100084, Peoples R China

[3] Jacobs Univ, Sch Engn & Sci, Bremen, Germany

[4] Shanghai Jiao Tong Univ, Dept Elect Engn, Shanghai 200240, Peoples R China

[5] Southeast Univ, SKL Mobile Commun, Nanjing, Peoples R China

[6] Xidian Univ, SKL ISN, Nanjing, Peoples R China

来源：

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS | 2011年 / 10卷 / 08期

关键词：

Channel estimation; optimal training design; time-varying channel; two-way relay network; basis expansion model; TRANSMISSIONS; DIVERSITY; EQUALIZATION; MODEL;

D O I：

10.1109/TWC.2011.060711.101407

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：

In this paper, channel estimation and training sequence design are considered for amplify-and-forward (AF)-based two-way relay networks (TWRNs) in a time-selective fading environment. A new complex-exponential basis expansion model (CE-BEM) is proposed to represent the mobile-to-mobile time-varying channels. To estimate such channels, a novel pilot symbol-aided transmission scheme is developed such that a low complex linear approach can estimate the BEM coefficients of the convoluted channels. More essentially, two algorithms are designed to extract the BEM coefficients of the individual channels. The optimal training parameters, including the number of the pilot symbols, the placement of the pilot symbols, and the power allocation to the pilot symbols, are derived by minimizing the channel mean-square error (MSE). The selections of the system parameters are thoroughly discussed in order to guide practical system design. Finally, extensive numerical results are provided to corroborate the proposed studies.

引用

页码：2681 / 2691

页数：11

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