AF two-path half duplex relaying with inter-relay self interference cancellation: diversity analysis and its improvement

In this paper, we consider a network consisting of one source, one destination and two relays, under a half duplex constraint. We analyze an amplify-and-forward (AF) two-path relaying scheme where one of the relays additionally performs inter-relay interference cancellation. With this inter-relay se...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on wireless communications 2009-09, Vol.8 (9), p.4720-4729
Main Authors: Wicaksana, H., Ting, S.H., Ho, C.K., Chin, W.H., Guan, Y.L.
Format: Article
Language:English
Subjects:
Access methods and protocols, osi model
Amplification
Amplify-and-forward
Applied sciences
Cancellation
Codes
Coding, codes
Degradation
Detection, estimation, filtering, equalization, prediction
diversity order
Equivalence
Exact sciences and technology
Gain
half duplex relaying
Information, signal and communications theory
Interference
Interference cancellation
Interference constraints
Mathematical analysis
MIMO
Multiplexing
Pairwise error probability
Performance analysis
Performance gain
precoding
Relaying
Relays
Signal and communications theory
Signal, noise
Space time codes
Spectra
Telecommunications
Telecommunications and information theory
Teleprocessing networks. Isdn
two-path relaying
Upper bound
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this paper, we consider a network consisting of one source, one destination and two relays, under a half duplex constraint. We analyze an amplify-and-forward (AF) two-path relaying scheme where one of the relays additionally performs inter-relay interference cancellation. With this inter-relay self interference cancellation, we show that degradation in performance can be significantly reduced when inter-relay channel gain increases. By treating the AF two-path relaying as an equivalent MIMO space time code, we derive an upper bound for the pairwise error probability (PEP) of this system. Previous works indicate that only a diversity order of two can be achieved even though physically there are three possibly independent spatial paths to the destination. From our analysis of the PEP, we analytically prove and identify the reason to the limited diversity order of two. We then propose a simple but novel precoding scheme which allows the system to achieve a full diversity order of three while maintaining the spectral efficiency gain of the two-path relaying protocol. A robust precoding design to achieve full diversity order with high coding gain is also proposed.
ISSN:1536-1276
1558-2248
DOI:10.1109/TWC.2009.081249