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An Efficient Receive Diversity Combining Technique for SC-FDMA-based Cooperative Relays  

Woo, Kyung-Soo (중앙대학교 디지탈통신 연구실)
Kim, Yeong-Jun (중앙대학교 디지탈통신 연구실)
Yoo, Hyun-Il (중앙대학교 디지탈통신 연구실)
Cho, Yong-Soo (중앙대학교 디지탈통신 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.35, no.4A, 2010 , pp. 307-314 More about this Journal
Abstract
In this paper, a receive diversity combining technique is proposed for single-carrier frequency division multiple access (SC-FDMA)-based cooperative relay systems when discrete Fourier transform (DFT) spreading sizes for mobile station (MS) and relay station (RS) are different. The proposed technique is composed of a DFT spreading size adjustment block, a phase rotation compensation block, a channel phase compensation block, and a receive diversity combining block. The proposed technique is robust to multipath channels and can be operated with a relatively small computational complexity because receive diversity combining is performed with scalar operations in the frequency-domain. It is shown by computer simulation that the proposed receive diversity combining techniques achieve a performance gain over the conventional maximal ratio combining (MRC) techniques for SC-FDMA-based cooperative relay systems.
Keywords
SC-FDMA; MMR; Cooperative Diversity; MRC;
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