Uncoordinated beamforming for cognitive networks

Simon Yiu, Chan Byoung Chae, Kai Yang, Doru Calin

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

In this paper, we propose jointly-optimized beamforming algorithms for cognitive networks to maximize the achievable rates, where primary and cognitive users share the same spectrum and are equipped with multiple antennas. We consider the transmission of a single information stream in both primary and secondary links. No coordination is required between the primary and cognitive users and the interference cancellation is done at the cognitive user. Specifically, the beamforming vectors of the cognitive link are designed to maximize the achievable rate under the condition that the interference both at the primary and cognitive receivers is completely nullified. Furthermore, it is proved that the achievable rate of a general N C t × 2 (N t C transmit antennas at the cognitive transmitter and 2 receive antennas at the cognitive receiver) cognitive multiple-input multiple-output (MIMO) link employing the optimal proposed beamformers (which completely nullifies the interference to and from the primary link while maximizing its own achievable rate) is the same as the rate of an interference-free (N t C-1) × 1 multiple-input single-output (MISO) link employing an optimal maximal ratio transmission beamforming vector. The sum rate performance of the proposed algorithms is evaluated by Monte Carlo simulations. The impact of the number of transmit and receive antennas on the proposed algorithm is also discussed.

Original languageEnglish
Article number6168185
Pages (from-to)1390-1397
Number of pages8
JournalIEEE Transactions on Communications
Volume60
Issue number5
DOIs
Publication statusPublished - 2012 May 1

Fingerprint

Beamforming
Antennas
Transmitters

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Cite this

Yiu, Simon ; Chae, Chan Byoung ; Yang, Kai ; Calin, Doru. / Uncoordinated beamforming for cognitive networks. In: IEEE Transactions on Communications. 2012 ; Vol. 60, No. 5. pp. 1390-1397.
@article{eb1de0153cfa410e85dd3611dd3402fa,
title = "Uncoordinated beamforming for cognitive networks",
abstract = "In this paper, we propose jointly-optimized beamforming algorithms for cognitive networks to maximize the achievable rates, where primary and cognitive users share the same spectrum and are equipped with multiple antennas. We consider the transmission of a single information stream in both primary and secondary links. No coordination is required between the primary and cognitive users and the interference cancellation is done at the cognitive user. Specifically, the beamforming vectors of the cognitive link are designed to maximize the achievable rate under the condition that the interference both at the primary and cognitive receivers is completely nullified. Furthermore, it is proved that the achievable rate of a general N C t × 2 (N t C transmit antennas at the cognitive transmitter and 2 receive antennas at the cognitive receiver) cognitive multiple-input multiple-output (MIMO) link employing the optimal proposed beamformers (which completely nullifies the interference to and from the primary link while maximizing its own achievable rate) is the same as the rate of an interference-free (N t C-1) × 1 multiple-input single-output (MISO) link employing an optimal maximal ratio transmission beamforming vector. The sum rate performance of the proposed algorithms is evaluated by Monte Carlo simulations. The impact of the number of transmit and receive antennas on the proposed algorithm is also discussed.",
author = "Simon Yiu and Chae, {Chan Byoung} and Kai Yang and Doru Calin",
year = "2012",
month = "5",
day = "1",
doi = "10.1109/TCOMM.2012.030712.110008",
language = "English",
volume = "60",
pages = "1390--1397",
journal = "IEEE Transactions on Communications",
issn = "0096-1965",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "5",

}

Uncoordinated beamforming for cognitive networks. / Yiu, Simon; Chae, Chan Byoung; Yang, Kai; Calin, Doru.

In: IEEE Transactions on Communications, Vol. 60, No. 5, 6168185, 01.05.2012, p. 1390-1397.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Uncoordinated beamforming for cognitive networks

AU - Yiu, Simon

AU - Chae, Chan Byoung

AU - Yang, Kai

AU - Calin, Doru

PY - 2012/5/1

Y1 - 2012/5/1

N2 - In this paper, we propose jointly-optimized beamforming algorithms for cognitive networks to maximize the achievable rates, where primary and cognitive users share the same spectrum and are equipped with multiple antennas. We consider the transmission of a single information stream in both primary and secondary links. No coordination is required between the primary and cognitive users and the interference cancellation is done at the cognitive user. Specifically, the beamforming vectors of the cognitive link are designed to maximize the achievable rate under the condition that the interference both at the primary and cognitive receivers is completely nullified. Furthermore, it is proved that the achievable rate of a general N C t × 2 (N t C transmit antennas at the cognitive transmitter and 2 receive antennas at the cognitive receiver) cognitive multiple-input multiple-output (MIMO) link employing the optimal proposed beamformers (which completely nullifies the interference to and from the primary link while maximizing its own achievable rate) is the same as the rate of an interference-free (N t C-1) × 1 multiple-input single-output (MISO) link employing an optimal maximal ratio transmission beamforming vector. The sum rate performance of the proposed algorithms is evaluated by Monte Carlo simulations. The impact of the number of transmit and receive antennas on the proposed algorithm is also discussed.

AB - In this paper, we propose jointly-optimized beamforming algorithms for cognitive networks to maximize the achievable rates, where primary and cognitive users share the same spectrum and are equipped with multiple antennas. We consider the transmission of a single information stream in both primary and secondary links. No coordination is required between the primary and cognitive users and the interference cancellation is done at the cognitive user. Specifically, the beamforming vectors of the cognitive link are designed to maximize the achievable rate under the condition that the interference both at the primary and cognitive receivers is completely nullified. Furthermore, it is proved that the achievable rate of a general N C t × 2 (N t C transmit antennas at the cognitive transmitter and 2 receive antennas at the cognitive receiver) cognitive multiple-input multiple-output (MIMO) link employing the optimal proposed beamformers (which completely nullifies the interference to and from the primary link while maximizing its own achievable rate) is the same as the rate of an interference-free (N t C-1) × 1 multiple-input single-output (MISO) link employing an optimal maximal ratio transmission beamforming vector. The sum rate performance of the proposed algorithms is evaluated by Monte Carlo simulations. The impact of the number of transmit and receive antennas on the proposed algorithm is also discussed.

UR - http://www.scopus.com/inward/record.url?scp=84861183928&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84861183928&partnerID=8YFLogxK

U2 - 10.1109/TCOMM.2012.030712.110008

DO - 10.1109/TCOMM.2012.030712.110008

M3 - Article

AN - SCOPUS:84861183928

VL - 60

SP - 1390

EP - 1397

JO - IEEE Transactions on Communications

JF - IEEE Transactions on Communications

SN - 0096-1965

IS - 5

M1 - 6168185

ER -