Intra-cell Overlay Opportunistic Spectrum Sharing By Employing 1-bit Feedback Beamforming
Conference: European Wireless 2013 - 19th European Wireless Conference
04/16/2013 - 04/18/2013 at Guildford, UK
Proceedings: European Wireless 2013
Pages: 5Language: englishTyp: PDF
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Authors:
Hou, Jiancao; Ma, Yi; Tafazolli, Rahim (Centre for Communication Systems Research, The University of Surrey, Guildford, UK)
Abstract:
This paper aims to investigate an intra-cell overlay opportunistic spectrum sharing scheme by employing 1-bit feedback beamforming. The work of interests is that base station broadcasts independent signal messages to two relay stations (RS-1 and RS-2). RS-2 decodes the signal messages in subcell 2 and attempts to share the spectrum of sub-cell 1 for its own transmission. For this reason, RS-2 makes a deal with RS-1 in sub-cell 1 to help RS-1 send its signal messages. As presented in the paper, by employing 1-bit feedback transmit beamforming, RS-2 can further improve RS-1’s achievable rate and automatically eliminate the interference from RS-2 to subcell 1. Meanwhile, the achievable sum-rate upper bound of RS-2 is also analyzed.