NDLI: Distributed beamforming with imperfect phase synchronization for cognitive radio networks

Content Provider	IEEE Xplore Digital Library
Author	Minturn, A. Vernekar, D. Yaoqing Yang Sharif, H.
Copyright Year	2013
Description	Author affiliation: Dept. of Comput. & Electron. Eng., Univ. of Nebraska-Lincoln, Lincoln, NE, USA (Minturn, A.; Vernekar, D.; Yaoqing Yang; Sharif, H.)
Abstract	In this paper, we present the analysis and simulation evaluation of a cognitive radio network employing a distributed beamforming technique with imperfect phase synchronization in the presence of a primary receiver. Our system model consists of a group of cognitive transmitters, each with an ideal isotropic antenna and equal transmit power, communicating with a secondary receiver in the far-field. The objective of the network of cognitive transmitters is to optimize its beampattern in the direction of the secondary receiver while minimizing the beampattern in the direction of the primary receiver to a certain threshold. The phases of the transmitted signals determine the beampattern, and we demonstrate that an optimization problem can be formulated to determine the phases of the transmitters that satisfy the constraints. We then evaluate the beampattern under imperfect phase synchronization and present how the phase error can impact the performance of beamforming and cause protection to the primary receiver to suffer. The results bring some interesting insights to distributed beamforming with imperfect phase synchronization for cognitive radio networks.
Starting Page	4936
Ending Page	4940
File Size	716585
Page Count	5
File Format	PDF
ISBN	9781467331227
ISSN	15503607
DOI	10.1109/ICC.2013.6655360
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-06-09
Publisher Place	Hungary
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Receivers Cognitive radio Radio transmitters Array signal processing Synchronization Signal to noise ratio Phase locked loops beampattern Signal processing distributed beamforming cognitive radio networks
Content Type	Text
Resource Type	Article

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