DocumentCode :
522417
Title :
Measurement of loop-back interference channels for outdoor-to-indoor full-duplex radio relays
Author :
Haneda, Katsuyuki ; Kahra, Eino ; Wyne, Shurjeel ; Icheln, Clemens ; Vainikainen, Pertti
Author_Institution :
Dept. of Radio Sci. & Eng., Aalto Univ., Aalto, Finland
fYear :
2010
fDate :
12-16 April 2010
Firstpage :
1
Lastpage :
5
Abstract :
A full-duplex relay enhances the end-to-end spectral efficiency compared to a half-duplex relay, provided that the loop-back interference at relays is managed well. In order to study the feasibility of the full-duplex relay, it is crucial to measure and model the loop-back interference channels. This paper presents a measurement campaign of these channels for outdoor-to-indoor communications. A compact relay antenna was developed to serve as a signal repeater between outdoor base stations and indoor users, and was used for the loop-back interference channel measurement. The magnitude of the interference was evaluated by the isolation between the transmit and receive antennas. Measurement results revealed that the isolation in multipath environment was 48 dB in the compact relay antenna, and it could be further reduced by placing the outdoor and indoor antennas in a different position referred to as a separate relay. Combined with an appropriate countermeasure to reduce the interference level, such as an interference canceller, the full-duplex operation of indoor compact relay station was found to be feasible.
Keywords :
Antenna arrays; Antenna measurements; Degradation; Interference cancellation; Interference channels; Mobile communication; Radio frequency; Radiofrequency interference; Receiving antennas; Relays;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Antennas and Propagation (EuCAP), 2010 Proceedings of the Fourth European Conference on
Conference_Location :
Barcelona, Spain
Print_ISBN :
978-1-4244-6431-9
Electronic_ISBN :
978-84-7653-472-4
Type :
conf
Filename :
5505588
Link To Document :
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