MMSE based block diagonalization for cognitive radio MIMO broadcast channels

Kyoung Jae Lee; Inkyu Lee

doi:10.1109/TWC.2011.081611.101853

MMSE based block diagonalization for cognitive radio MIMO broadcast channels

Kyoung Jae Lee, Inkyu Lee

Research output: Contribution to journal › Article › peer-review

42 Citations (Scopus)

Abstract

In this paper, we present a linear precoder design for cognitive radio (CR) multi-user multiple-input multiple-output (MU-MIMO) downlink systems where unlicensed secondary users (SUs) can simultaneously utilize the same spectrum used by a licensed primary user (PU). Although a zero-forcing block diagonalization (ZF-BD) precoder is extended to the CR network with the PU, a transmit power boost problem occurs. Therefore, we propose a regularized BD precoder method based on the minimum mean-squared error (MMSE) criteria subject to the interference power constraint under a predetermined threshold for the PU. As a result, the proposed CR-MMSE-BD scheme improves the signal-to- interference-plus-noise ratio at each SU's receiver, compared to the ZF-BD based method. The simulation results demonstrate that the proposed algorithm outperforms the ZF based technique for CR MU-MIMO downlink systems.

Original language	English
Article number	6002431
Pages (from-to)	3139-3144
Number of pages	6
Journal	IEEE Transactions on Wireless Communications
Volume	10
Issue number	10
DOIs	https://doi.org/10.1109/TWC.2011.081611.101853
Publication status	Published - 2011 Oct

Bibliographical note

Funding Information:
Manuscript received October 19, 2010; revised April 10, 2011 and July 6, 2011; accepted July 7, 2011. The associate editor coordinating the review of this paper and approving it for publication was G. Colavolpe. This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea Government (MEST) (No. 2010-0017909). The material in this paper was presented in part at IEEE ICC, June 2011. The authors are with the School of Electrical Engineering, Korea University, Seoul, Korea (e-mail: {kyoungjae, inkyu}@korea.ac.kr). Digital Object Identifier 10.1109/TWC.2011.081611.101853

Keywords

Cognitive radio
block diagonalization (BD)
minimum mean-squared error (MMSE)
multi-user MIMO

ASJC Scopus subject areas

Computer Science Applications
Electrical and Electronic Engineering
Applied Mathematics

Access to Document

10.1109/TWC.2011.081611.101853

Cite this

@article{e71be7e82c17497eac78d5796e511b3c,

title = "MMSE based block diagonalization for cognitive radio MIMO broadcast channels",

abstract = "In this paper, we present a linear precoder design for cognitive radio (CR) multi-user multiple-input multiple-output (MU-MIMO) downlink systems where unlicensed secondary users (SUs) can simultaneously utilize the same spectrum used by a licensed primary user (PU). Although a zero-forcing block diagonalization (ZF-BD) precoder is extended to the CR network with the PU, a transmit power boost problem occurs. Therefore, we propose a regularized BD precoder method based on the minimum mean-squared error (MMSE) criteria subject to the interference power constraint under a predetermined threshold for the PU. As a result, the proposed CR-MMSE-BD scheme improves the signal-to- interference-plus-noise ratio at each SU's receiver, compared to the ZF-BD based method. The simulation results demonstrate that the proposed algorithm outperforms the ZF based technique for CR MU-MIMO downlink systems.",

keywords = "Cognitive radio, block diagonalization (BD), minimum mean-squared error (MMSE), multi-user MIMO",

author = "Lee, {Kyoung Jae} and Inkyu Lee",

note = "Funding Information: Manuscript received October 19, 2010; revised April 10, 2011 and July 6, 2011; accepted July 7, 2011. The associate editor coordinating the review of this paper and approving it for publication was G. Colavolpe. This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea Government (MEST) (No. 2010-0017909). The material in this paper was presented in part at IEEE ICC, June 2011. The authors are with the School of Electrical Engineering, Korea University, Seoul, Korea (e-mail: {kyoungjae, inkyu}@korea.ac.kr). Digital Object Identifier 10.1109/TWC.2011.081611.101853",

year = "2011",

month = oct,

doi = "10.1109/TWC.2011.081611.101853",

language = "English",

volume = "10",

pages = "3139--3144",

journal = "IEEE Transactions on Wireless Communications",

issn = "1536-1276",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

number = "10",

}

TY - JOUR

T1 - MMSE based block diagonalization for cognitive radio MIMO broadcast channels

AU - Lee, Kyoung Jae

AU - Lee, Inkyu

N1 - Funding Information: Manuscript received October 19, 2010; revised April 10, 2011 and July 6, 2011; accepted July 7, 2011. The associate editor coordinating the review of this paper and approving it for publication was G. Colavolpe. This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea Government (MEST) (No. 2010-0017909). The material in this paper was presented in part at IEEE ICC, June 2011. The authors are with the School of Electrical Engineering, Korea University, Seoul, Korea (e-mail: {kyoungjae, inkyu}@korea.ac.kr). Digital Object Identifier 10.1109/TWC.2011.081611.101853

PY - 2011/10

Y1 - 2011/10

N2 - In this paper, we present a linear precoder design for cognitive radio (CR) multi-user multiple-input multiple-output (MU-MIMO) downlink systems where unlicensed secondary users (SUs) can simultaneously utilize the same spectrum used by a licensed primary user (PU). Although a zero-forcing block diagonalization (ZF-BD) precoder is extended to the CR network with the PU, a transmit power boost problem occurs. Therefore, we propose a regularized BD precoder method based on the minimum mean-squared error (MMSE) criteria subject to the interference power constraint under a predetermined threshold for the PU. As a result, the proposed CR-MMSE-BD scheme improves the signal-to- interference-plus-noise ratio at each SU's receiver, compared to the ZF-BD based method. The simulation results demonstrate that the proposed algorithm outperforms the ZF based technique for CR MU-MIMO downlink systems.

AB - In this paper, we present a linear precoder design for cognitive radio (CR) multi-user multiple-input multiple-output (MU-MIMO) downlink systems where unlicensed secondary users (SUs) can simultaneously utilize the same spectrum used by a licensed primary user (PU). Although a zero-forcing block diagonalization (ZF-BD) precoder is extended to the CR network with the PU, a transmit power boost problem occurs. Therefore, we propose a regularized BD precoder method based on the minimum mean-squared error (MMSE) criteria subject to the interference power constraint under a predetermined threshold for the PU. As a result, the proposed CR-MMSE-BD scheme improves the signal-to- interference-plus-noise ratio at each SU's receiver, compared to the ZF-BD based method. The simulation results demonstrate that the proposed algorithm outperforms the ZF based technique for CR MU-MIMO downlink systems.

KW - Cognitive radio

KW - block diagonalization (BD)

KW - minimum mean-squared error (MMSE)

KW - multi-user MIMO

UR - http://www.scopus.com/inward/record.url?scp=80855147422&partnerID=8YFLogxK

U2 - 10.1109/TWC.2011.081611.101853

DO - 10.1109/TWC.2011.081611.101853

M3 - Article

AN - SCOPUS:80855147422

SN - 1536-1276

VL - 10

SP - 3139

EP - 3144

JO - IEEE Transactions on Wireless Communications

JF - IEEE Transactions on Wireless Communications

IS - 10

M1 - 6002431

ER -

MMSE based block diagonalization for cognitive radio MIMO broadcast channels

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this