Adaptive self-interference suppression for full-duplex relays with multiple receive antennas

Author

Antonio-Rodriguez, Emilio ; Lopez-Valcarce, Roberto

Author_Institution

Galician R&D Center in Adv. Telecommun. (GRADIANT), Vigo, Spain

fYear

2012

fDate

17-20 June 2012

Firstpage

454

Lastpage

458

Abstract

In full-duplex relays, simultaneous reception and transmission in the same frequency results in self-interference which distorts the retransmitted signal and makes the relay prone to oscillation. We present an adaptive feedback canceller for multiple-input single-output (MISO) relays, efficiently combining spatial and temporal processing. The receive array is adaptively steered towards the minimum variance distortionless response (MVDR), whereas the temporal filter update is based on a novel low-complexity spectrum shaping scheme which avoids introducing additional delay in the relay station.

Keywords

array signal processing; filtering theory; interference suppression; oscillations; radio spectrum management; receiving antennas; relays; MISO relays; MVDR; adaptive feedback canceller; adaptive self-interference suppression; additional delay; full-duplex relays; low-complexity spectrum shaping scheme; minimum variance distortionless response; multiple receive antennas; multiple-input single-output relays; oscillation; receive array; relay station; retransmitted signal; spatial processing; temporal filter update; temporal processing; Adaptive algorithms; Arrays; Couplings; Delay; Receiving antennas; Relays; Transfer functions; Full-duplex; MISO; MVDR; adaptive algorithm; feedback cancellation; relays; spectrum shaping;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing Advances in Wireless Communications (SPAWC), 2012 IEEE 13th International Workshop on

Conference_Location

Cesme

ISSN

1948-3244

Print_ISBN

978-1-4673-0970-7

Type

conf

DOI

10.1109/SPAWC.2012.6292948

Filename

6292948