Tradeoff Analysis of Partial Zero-Forcing Beamforming in Large Random Spectrum Sharing Networks
Refereed conference paper presented and published in conference proceedings

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AbstractIn wireless networks, the availability of multiple transmitting antennas can be exploited in several ways. One way is to reduce the interference to unintended receivers by placing beamforming nulls in those directions, as is done in zero-forcing beamforming. Another is to boost the received signal strength at the desired receiver using "matched" transmit beamforming. This work studies a partial zero-forcing beamforming scheme that combines these two traditional transmission schemes, and examines its performance gain in large random spectrum sharing networks. Specifically, beamforming vectors are designed to null the aggregate interference towards a number of selected primary receivers and to boost the received signal strength at the intended receiver. Considering Poisson distributed users and Rayleigh fading channels, the statistical characterizations of signal and interference are analyzed and the optimal number of nulled receivers is discussed. The simulation results show that by employing partial zero-forcing beamforming with a judiciously chosen number of nulls, the permissible density of secondary transmitters can be maximized while protecting the successful transmission probabilities of individual networks.
All Author(s) ListCai R, Ching PC, Davidson TN
Name of ConferenceIEEE 15th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)
Start Date of Conference22/06/2014
End Date of Conference25/06/2014
Place of ConferenceToronto
Country/Region of ConferenceCanada
Proceedings Title2014 IEEE 15th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)
Detailed descriptionorganized by IEEE Signal Processing Soceity,
Pages75 - 79
LanguagesEnglish-United Kingdom
KeywordsInterference, Receivers, Array signal processing, Vectors, Transmitters, Partial transmit sequences, Wireless communication
Web of Science Subject CategoriesEngineering; Engineering, Electrical & Electronic; Telecommunications

Last updated on 2020-30-11 at 00:45