Adaptive Modulation in Decode-and-Forward Cooperative Communications With Limited Source-Relay CSI

Author

Min-Kuan Chang ; Feng-Tsun Chien

Author_Institution

Grad. Inst. of Commun. Eng., Nat. Chung Hsing Univ., Taichung, Taiwan

Volume

18

Issue

12

fYear

2014

fDate

Dec. 2014

Firstpage

2157

Lastpage

2160

Abstract

In this letter, we study the problem of adaptive modulation (AM) in cooperative decode-and-forward (DF) relaying systems with limited channel state information (CSI) of the source-relay link. We first develop the signal-to-noise ratio (SNR)-based opportunistic AM and obtain the regions of the source-destination and relay-destination link SNR, by which whether cooperative relaying is needed and what constellation size should be chosen can be determined without requiring the source-relay link CSI. We also propose the probabilistic AM to further enhance the transmission rate. Simulation results demonstrate the effectiveness of the proposed AM criteria.

Keywords

adaptive modulation; cooperative communication; decode and forward communication; probability; radio links; relay networks (telecommunication); wireless channels; SNR-based opportunistic AM; channel state information; cooperative DF relaying system; decode and forward cooperative communication; probabilistic adaptive modulation; relay destination link SNR; signal-to-noise ratio; source destination link SNR; source-relay link CSI; Binary phase shift keying; Cooperative systems; Probabilistic logic; Relays; Signal to noise ratio; Adaptive modulation; Decode-and-forward protocol; Multi-node cooperative communications; adaptive modulation; decode-and-forward protocol;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2014.2366099

Filename

6940230