Relay Selection Schemes for Precoded Cooperative OFDM and Their Achievable Diversity Orders

Author

Zhang, Qingchuan ; Shu, Feng ; Wang, Mao ; Sun, Jintao

Author_Institution

Sch. of Electron. & Opt. Engi neering, Nanjing Univ. of Sci. & Technol., Nanjing, China

Volume

18

Issue

4

fYear

2011

fDate

4/1/2011 12:00:00 AM

Firstpage

231

Lastpage

234

Abstract

We investigate two different relay selection (RS) methods for precoded decode-and-forward (DF) cooperative OFDM systems: one scheme is to select the best relays for individual precoding groups (IPG-RS), and the other is to choose a single relay for the entire precoding groups (EPG-RS). We derive their diversity performances from the pairwise error probability (PEP) analysis, indicating that both schemes can achieve the full frequency and cooperative diversity with a proper choice of precoding size. Numerical results also show that IPG-RS can either reduce the decoding complexity or improve the error performance significantly as compared to existing solutions whereas EPG-RS has some performance loss as a result of less communication overhead.

Keywords

OFDM modulation; communication complexity; cooperative communication; IPG-RS; OFDM; cooperative OFDM systems; decoding complexity; individual preceding groups; pairwise error probability; preceding groups; precoded cooperative; relay selection; Decoding; Frequency diversity; Materials; Matrix decomposition; OFDM; Relays; Time division multiplexing; Decode-and-forward (DF); OFDM; diversity order; precoding; relay selection (RS);

fLanguage

English

Journal_Title

Signal Processing Letters, IEEE

Publisher

ieee

ISSN

1070-9908

Type

jour

DOI

10.1109/LSP.2011.2111368

Filename

5708169