Cooperative inter-beam nulling: A side-channel strategy for managing inter-beam interference

Andrew Kwong; Ashutosh Sabharwal

doi:10.1109/ACSSC.2015.7421340

Cooperative inter-beam nulling: A side-channel strategy for managing inter-beam interference

Andrew Kwong, Ashutosh Sabharwal

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Scopus citations

Abstract

Conjugate beamforming is a practical method of enabling simultaneous downlink to multiple users, but it suffers from inter-beam interference. We propose to utilize side-channels so that users can amplify-and-forward their received signals to other users. The amplified-and-forwarded signals are used with a decorrelating receiver to null interference in a strategy called cooperative inter-beam nulling (CIBN). We derive, simulate, and analyze the achievable rate of CIBN. Our results show that CIBN provides significant rate gains with a sufficient number of base station antennas (>10) and received side-channel SNR (> 5 dB), and that rich scattering environments provide the most rate gains.

Original language	English (US)
Title of host publication	Conference Record of the 49th Asilomar Conference on Signals, Systems and Computers, ACSSC 2015
Editors	Michael B. Matthews
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	1242-1246
Number of pages	5
ISBN (Electronic)	9781467385763
DOIs	https://doi.org/10.1109/ACSSC.2015.7421340
State	Published - Feb 26 2016
Event	49th Asilomar Conference on Signals, Systems and Computers, ACSSC 2015 - Pacific Grove, United States Duration: Nov 8 2015 → Nov 11 2015

Publication series

Name	Conference Record - Asilomar Conference on Signals, Systems and Computers
Volume	2016-February
ISSN (Print)	1058-6393

Other

Other	49th Asilomar Conference on Signals, Systems and Computers, ACSSC 2015
Country/Territory	United States
City	Pacific Grove
Period	11/8/15 → 11/11/15

ASJC Scopus subject areas

Signal Processing
Computer Networks and Communications

Access to Document

10.1109/ACSSC.2015.7421340

Cite this

Kwong, A., & Sabharwal, A. (2016). Cooperative inter-beam nulling: A side-channel strategy for managing inter-beam interference. In M. B. Matthews (Ed.), Conference Record of the 49th Asilomar Conference on Signals, Systems and Computers, ACSSC 2015 (pp. 1242-1246). Article 7421340 (Conference Record - Asilomar Conference on Signals, Systems and Computers; Vol. 2016-February). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ACSSC.2015.7421340

Cooperative inter-beam nulling: A side-channel strategy for managing inter-beam interference. / Kwong, Andrew; Sabharwal, Ashutosh.
Conference Record of the 49th Asilomar Conference on Signals, Systems and Computers, ACSSC 2015. ed. / Michael B. Matthews. Institute of Electrical and Electronics Engineers Inc., 2016. p. 1242-1246 7421340 (Conference Record - Asilomar Conference on Signals, Systems and Computers; Vol. 2016-February).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Kwong, A & Sabharwal, A 2016, Cooperative inter-beam nulling: A side-channel strategy for managing inter-beam interference. in MB Matthews (ed.), Conference Record of the 49th Asilomar Conference on Signals, Systems and Computers, ACSSC 2015., 7421340, Conference Record - Asilomar Conference on Signals, Systems and Computers, vol. 2016-February, Institute of Electrical and Electronics Engineers Inc., pp. 1242-1246, 49th Asilomar Conference on Signals, Systems and Computers, ACSSC 2015, Pacific Grove, United States, 11/8/15. https://doi.org/10.1109/ACSSC.2015.7421340

Kwong A, Sabharwal A. Cooperative inter-beam nulling: A side-channel strategy for managing inter-beam interference. In Matthews MB, editor, Conference Record of the 49th Asilomar Conference on Signals, Systems and Computers, ACSSC 2015. Institute of Electrical and Electronics Engineers Inc. 2016. p. 1242-1246. 7421340. (Conference Record - Asilomar Conference on Signals, Systems and Computers). doi: 10.1109/ACSSC.2015.7421340

Kwong, Andrew ; Sabharwal, Ashutosh. / Cooperative inter-beam nulling : A side-channel strategy for managing inter-beam interference. Conference Record of the 49th Asilomar Conference on Signals, Systems and Computers, ACSSC 2015. editor / Michael B. Matthews. Institute of Electrical and Electronics Engineers Inc., 2016. pp. 1242-1246 (Conference Record - Asilomar Conference on Signals, Systems and Computers).

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AB - Conjugate beamforming is a practical method of enabling simultaneous downlink to multiple users, but it suffers from inter-beam interference. We propose to utilize side-channels so that users can amplify-and-forward their received signals to other users. The amplified-and-forwarded signals are used with a decorrelating receiver to null interference in a strategy called cooperative inter-beam nulling (CIBN). We derive, simulate, and analyze the achievable rate of CIBN. Our results show that CIBN provides significant rate gains with a sufficient number of base station antennas (>10) and received side-channel SNR (> 5 dB), and that rich scattering environments provide the most rate gains.

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Cooperative inter-beam nulling: A side-channel strategy for managing inter-beam interference

Abstract

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