NDLI: BER minimization for cognitive radio systems with difference antenna selection

Content Provider	IEEE Xplore Digital Library
Author	Yue Wang Coon, J.
Copyright Year	2011
Description	Author affiliation: Telecommunications Research Laboratory (TRL), Toshiba Research Europe Limited, 32 Queen Square, Bristol, UK, BS1 4ND (Yue Wang; Coon, J.)
Abstract	In this paper, we analyze the bit-error rate (BER) of the secondary transmission in a wireless cognitive radio (CR) system with difference antenna selection, whereby a single transmit antenna is selected at the secondary transmitter out of M possible antennas such that the weighted difference between the channel gains of the data link and the interference link is maximized. We propose a method of minimizing the BER of the secondary data link subject to constraints on the average secondary transmit power and the average interference power as seen by the primary receiver. Minimization is performed over two parameters: the average secondary transmit power and the difference selection weight δ ∊ [0,1]. Furthermore, we show that, interestingly, the diversity gain of the secondary link is an impulsive function of δ, in that full diversity is achieved when δ = 1 and no diversity is achieved otherwise. We discuss the implications of this finding on practical system design, and address the effects that the constraints have on the BER.
Starting Page	304
Ending Page	309
File Size	185592
Page Count	6
File Format	PDF
ISBN	9781457702525
ISSN	21545952
e-ISBN	9781457702532
e-ISBN	9781457702518
DOI	10.1109/PACRIM.2011.6032910
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-08-23
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Bit error rate Transmitting antennas Interference Receiving antennas Binary phase shift keying
Content Type	Text
Resource Type	Article

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