A Reduced Feedback Precoder for MIMO-OFDM Cooperative Diversity Systems

被引：9

作者：

Kim, Kyeong Jin ^{[1
]}

Fan, Yijia ^{[2
]}

Iltis, Ronald A. ^{[3
]}

Poor, H. Vincent ^{[2
]}

Lee, Moon Ho ^{[4
]}

机构：

[1] Inha Univ, Inchon 402751, South Korea

[2] Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA

[3] Univ Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USA

[4] Chonbuk Natl Univ, Inst Informat & Commun, Jeonju 560756, South Korea

来源：

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY | 2012年 / 61卷 / 02期

基金：

新加坡国家研究基金会; 美国国家科学基金会;

关键词：

Achievable average sum-rate; cooperative relay network; Grassmannian codebook; kernel density estimation (KDE); multiple-input-multiple-output-orthogonal frequency-division multiplexing (MIMO-OFDM) feedback overhead; outage probability; precoder; QR decomposition (QRD); two-hop amplify-and-forward (AF) protocol; LIMITED-FEEDBACK; TRANSCEIVER DESIGN; DECOMPOSITION; STATISTICS; NETWORKS;

D O I：

10.1109/TVT.2011.2181548

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：

A new precoder that reduces the feedback overhead in an orthogonal frequency-division multiplexing (OFDM)-based relay network is proposed. A joint singular value decomposition (SVD) and QR decomposition is employed on the source-destination link and the source-relay-destination link. Using the proposed precoder, only one precoding matrix needs to be fed back, independent of the total number of subcarriers. Kernel density estimation is applied to determine approximate forms of unknown distributions of the end-to-end effective channel powers obtained by this precoder. Using approximated probability density functions (pdfs) for these effective channel powers, closed-form expressions for the link achievable average sum-rate and the outage probability can be derived and then their accuracies verified via Monte Carlo simulations. The achievable sum-rates are also compared with that of SVD-based precoders and for varying codebook size.

引用

页码：584 / 596

页数：13

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