Gaussian Interference Channel Aided by a Relay with Out-of-Band Reception and In-Band Transmission

Author

Sahin, Onur ; Simeone, Osvaldo ; Erkip, Elza

Author_Institution

Dept. of Electr. & Comput. Eng., Polytech. Inst. of New York Univ., New York, NY, USA

Volume

59

Issue

11

fYear

2011

fDate

11/1/2011 12:00:00 AM

Firstpage

2976

Lastpage

2981

Abstract

A Gaussian Interference Channel (IC) is investigated in which a relay assists two source-destination pairs. The relay is assumed to receive over dedicated orthogonal channels from the sources (e.g., over orthogonal bands or time slots, or over wired links), while it transmits in the same band as the sources. This scenario is referred to as IC assisted by an out-of-band reception/ in-band transmission relay (IC-OIR). An achievable rate region is derived for the IC-OIR that encompasses, besides the standard signal relaying, interference management via interference relaying, cancellation and precoding. The sum-capacity is found in a specific regime defined by the very strong relay-interference conditions. Numerical results validate the performance gains of interference mitigation via the relay.

Keywords

Gaussian processes; channel coding; diversity reception; interference suppression; precoding; Gaussian interference channel; in-band transmission; interference cancellation; interference precoding; orthogonal channels; out-of-band reception; relay interference signal; Encoding; Guassian processes; Integrated circuits; Interference channels; Noise measurement; Resource management; Gaussian interference channel; Relays; interference forwarding; interference mitigation; parallel channels; power allocation;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/TCOMM.2011.091409.090260

Filename

6024420