Bandwidth Efficient Cooperative Diversity Scheme Based on Constellation Rotation

Author

Cao, Mingwei ; Bi, Guangguo

Author_Institution

Nat. Mobile Commun. Res. Lab., Southeast Univ., Nanjing

Volume

15

fYear

2008

fDate

6/30/1905 12:00:00 AM

Firstpage

869

Lastpage

872

Abstract

A bandwidth efficient three-user cooperative diversity scheme is proposed. Each user has two partners who receive its symbols and rotate the phases of these symbols. Then, two partners retransmit the real parts and imaginary parts of these rotated symbols, respectively. This scheme can offer diversity order of three, and the bandwidth efficiency is only decreased by 1/2 compared to a noncooperative diversity scheme. The optimal rotation angles are derived when QPSK and 8PSK modulations are employed, respectively. Then, a new symbol mapping for 8PSK modulation is proposed, and it is a simple way to improve the system performance.

Keywords

diversity reception; phase shift keying; quadrature phase shift keying; 8PSK modulation; QPSK modulation; bandwidth efficient three-user cooperative diversity scheme; constellation rotation; symbol mapping; Bandwidth; Bismuth; Cyclic redundancy check; Decoding; Fading; Quadrature phase shift keying; Receiving antennas; Relays; System performance; Transmitting antennas; Bandwidth efficiency; cooperative diversity; fading channels;

fLanguage

English

Journal_Title

Signal Processing Letters, IEEE

Publisher

ieee

ISSN

1070-9908

Type

jour

DOI

10.1109/LSP.2008.2007614

Filename

4682555