Large System Analysis of Cooperative Multi-Cell Downlink Transmission via Regularized Channel Inversion with Imperfect CSIT | IEEE Journals & Magazine | IEEE Xplore
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Large System Analysis of Cooperative Multi-Cell Downlink Transmission via Regularized Channel Inversion with Imperfect CSIT

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Jun Zhang; Chao-Kai Wen; Shi Jin; Xiqi Gao; Kai-Kit Wong
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Abstract:

In this paper, we analyze the ergodic sum-rate of a multi-cell downlink system with base station (BS) cooperation using regularized zero-forcing (RZF) precoding. Our mode...Show More

Metadata

Abstract:

In this paper, we analyze the ergodic sum-rate of a multi-cell downlink system with base station (BS) cooperation using regularized zero-forcing (RZF) precoding. Our model assumes that the channels between BSs and users have independent spatial correlations and imperfect channel state information at the transmitter (CSIT) is available. Our derivations are based on large dimensional random matrix theory (RMT) under the assumption that the numbers of antennas at the BS and users approach to infinity with some fixed ratios. In particular, a deterministic equivalent expression of the ergodic sum-rate is obtained and is instrumental in getting insight about the joint operations of BSs, which leads to an efficient method to find the asymptotic-optimal regularization parameter for the RZF. In another application, we use the deterministic channel rate to study the optimal feedback bit allocation among the BSs for maximizing the ergodic sum-rate, subject to a total number of feedback bits constraint. By inspecting the properties of the allocation, we further propose a scheme to greatly reduce the search space for optimization. Simulation results demonstrate that the ergodic sum-rates achievable by a subspace search provides comparable results to those by an exhaustive search under various typical settings.
Published in: IEEE Transactions on Wireless Communications ( Volume: 12, Issue: 10, October 2013)
Page(s): 4801 - 4813
Date of Publication: 23 August 2013

ISSN Information:

DOI: 10.1109/TWC.2013.081413.120460
Author image of Jun Zhang
Singapore University of Technology and Design, Singapore
Jun Zhang (S'09) received the M.S. degree in Statistics with Department of Mathematics from Southeast University, Nanjing, China, in 2009, and the Ph.D. degree in Communications Information System with the National Mobile Communications Research Laboratory, Southeast University, Nanjing, China, in 2013. He is currently conducting his postdoctoral research in the Singapore University of Technology and Design, Singapore. Hi...Show More
Jun Zhang (S'09) received the M.S. degree in Statistics with Department of Mathematics from Southeast University, Nanjing, China, in 2009, and the Ph.D. degree in Communications Information System with the National Mobile Communications Research Laboratory, Southeast University, Nanjing, China, in 2013. He is currently conducting his postdoctoral research in the Singapore University of Technology and Design, Singapore. Hi...View more
Author image of Chao-Kai Wen
Institute of Communications Engineering, National Sun Yat-sen University, Taiwan
Chao-Kai Wen (S'00–M'04) received the Ph.D. degree from the Institute of Communications Engineering, National Tsing Hua University, Hsinchu, Taiwan, in 2004. From 2005 to September 2006, he was with the Industrial Technology Research Institute, Hsinchu, Taiwan, as an Engineer. From October 2006 to January 2009, he was with MediaTek Inc., Hsinchu, Taiwan, where he was engaged in broadband digital transceiver design. Since ...Show More
Chao-Kai Wen (S'00–M'04) received the Ph.D. degree from the Institute of Communications Engineering, National Tsing Hua University, Hsinchu, Taiwan, in 2004. From 2005 to September 2006, he was with the Industrial Technology Research Institute, Hsinchu, Taiwan, as an Engineer. From October 2006 to January 2009, he was with MediaTek Inc., Hsinchu, Taiwan, where he was engaged in broadband digital transceiver design. Since ...View more
Author image of Shi Jin
National Mobile Communications Research Laboratory, Southeast University, Nanjing, P. R. China
Shi Jin (S'06-M'07) received the B.S. degree in communications engineering from Guilin University of Electronic Technology, Guilin, China, in 1996, the M.S. degree from Nanjing University of Posts and Telecommunications, Nanjing, China, in 2003, and the Ph.D. degree in communications and information systems from the Southeast University, Nanjing, in 2007.
From June 2007 to October 2009, he was a Research Fellow with the Ad...Show More
Shi Jin (S'06-M'07) received the B.S. degree in communications engineering from Guilin University of Electronic Technology, Guilin, China, in 1996, the M.S. degree from Nanjing University of Posts and Telecommunications, Nanjing, China, in 2003, and the Ph.D. degree in communications and information systems from the Southeast University, Nanjing, in 2007.
From June 2007 to October 2009, he was a Research Fellow with the Ad...View more
Author image of Xiqi Gao
National Mobile Communications Research Laboratory, Southeast University, Nanjing, P. R. China
Xiqi Gao received the Ph.D. degree in electrical engineering from Southeast University, Nanjing, China, in 1997. He joined the Department of Radio Engineering, Southeast University, in April 1992. Since May 2001, he has been a professor of information systems and communications. From September 1999 to August 2000, he was a visiting scholar at Massachusetts Institute of Technology, Cambridge, and Boston University, Boston,...Show More
Xiqi Gao received the Ph.D. degree in electrical engineering from Southeast University, Nanjing, China, in 1997. He joined the Department of Radio Engineering, Southeast University, in April 1992. Since May 2001, he has been a professor of information systems and communications. From September 1999 to August 2000, he was a visiting scholar at Massachusetts Institute of Technology, Cambridge, and Boston University, Boston,...View more
Author image of Kai-Kit Wong
Department of Electronic and Electrical Engineering, University College, London, UK
Kai-Kit Wong received the BEng, the MPhil, and the PhD degrees, all in Electrical and Electronic Engineering, from the Hong Kong University of Science and Technology, Hong Kong, in 1996, 1998, and 2001, respectively. His PhD thesis was on using MIMO antennas for multiuser wireless communications. Since August 2006, he has been with University College London, first at Adastral Park Campus and at present the Department of E...Show More
Kai-Kit Wong received the BEng, the MPhil, and the PhD degrees, all in Electrical and Electronic Engineering, from the Hong Kong University of Science and Technology, Hong Kong, in 1996, 1998, and 2001, respectively. His PhD thesis was on using MIMO antennas for multiuser wireless communications. Since August 2006, he has been with University College London, first at Adastral Park Campus and at present the Department of E...View more
Contents

I. Introduction

Multi-user multiple-input multiple-output (MU-MIMO) has been well recognized as an effective means to increase capacity in the downlink [1]–[3]. However, challenges arise in practical cellular systems where inter-cell interference remains the bottleneck limiting the achievable performance. Therefore, base station (BS) cooperation was recently proposed as a way to alleviate the issue, e.g., [4]–[10], which is greatly motivated by the fact that BSs may be connected via high-speed backhaul links and the channel state information (CSI) and/or data and/or precoding matrices can be shared among the BSs for coordinated transmission. Such BS cooperation in the downlink can improve sum-rates and reduce outage as compared to the conventional or single-cell signal processing where the interference (often from other cells) is treated as noise.

Author image of Jun Zhang
Singapore University of Technology and Design, Singapore
Jun Zhang (S'09) received the M.S. degree in Statistics with Department of Mathematics from Southeast University, Nanjing, China, in 2009, and the Ph.D. degree in Communications Information System with the National Mobile Communications Research Laboratory, Southeast University, Nanjing, China, in 2013. He is currently conducting his postdoctoral research in the Singapore University of Technology and Design, Singapore. His research interests include multicell cooperative MIMO systems, massive MIMO communications, large dimensional random matrix theory.
Jun Zhang (S'09) received the M.S. degree in Statistics with Department of Mathematics from Southeast University, Nanjing, China, in 2009, and the Ph.D. degree in Communications Information System with the National Mobile Communications Research Laboratory, Southeast University, Nanjing, China, in 2013. He is currently conducting his postdoctoral research in the Singapore University of Technology and Design, Singapore. His research interests include multicell cooperative MIMO systems, massive MIMO communications, large dimensional random matrix theory.View more
Author image of Chao-Kai Wen
Institute of Communications Engineering, National Sun Yat-sen University, Taiwan
Chao-Kai Wen (S'00–M'04) received the Ph.D. degree from the Institute of Communications Engineering, National Tsing Hua University, Hsinchu, Taiwan, in 2004. From 2005 to September 2006, he was with the Industrial Technology Research Institute, Hsinchu, Taiwan, as an Engineer. From October 2006 to January 2009, he was with MediaTek Inc., Hsinchu, Taiwan, where he was engaged in broadband digital transceiver design. Since February 2009, he has been with the Institute of Communications Engineering, National Sun Yat-sen University, Kaohsiung, Taiwan, where he is now an Associate Professor. His current research interests center around the optimization in wireless multimedia networks and multiuser detection problems.
Chao-Kai Wen (S'00–M'04) received the Ph.D. degree from the Institute of Communications Engineering, National Tsing Hua University, Hsinchu, Taiwan, in 2004. From 2005 to September 2006, he was with the Industrial Technology Research Institute, Hsinchu, Taiwan, as an Engineer. From October 2006 to January 2009, he was with MediaTek Inc., Hsinchu, Taiwan, where he was engaged in broadband digital transceiver design. Since February 2009, he has been with the Institute of Communications Engineering, National Sun Yat-sen University, Kaohsiung, Taiwan, where he is now an Associate Professor. His current research interests center around the optimization in wireless multimedia networks and multiuser detection problems.View more
Author image of Shi Jin
National Mobile Communications Research Laboratory, Southeast University, Nanjing, P. R. China
Shi Jin (S'06-M'07) received the B.S. degree in communications engineering from Guilin University of Electronic Technology, Guilin, China, in 1996, the M.S. degree from Nanjing University of Posts and Telecommunications, Nanjing, China, in 2003, and the Ph.D. degree in communications and information systems from the Southeast University, Nanjing, in 2007.
From June 2007 to October 2009, he was a Research Fellow with the Adastral Park Research Campus, University College London, London, U.K. He is currently with the faculty of the National Mobile Communications Research Laboratory, Southeast University. His research interests include space time wireless communications, random matrix theory, and information theory. He serves as an Associate Editor for the IEEE Transactions on Wireless Communications and IEEE Communications Letters.
Dr. Jin and his co-authors have been awarded the 2011 IEEE Communications Society Stephen O. Rice Prize Paper Award in the field of communication theory and a 2010 Young Author Best Paper Award by the IEEE Signal Processing Society.
Shi Jin (S'06-M'07) received the B.S. degree in communications engineering from Guilin University of Electronic Technology, Guilin, China, in 1996, the M.S. degree from Nanjing University of Posts and Telecommunications, Nanjing, China, in 2003, and the Ph.D. degree in communications and information systems from the Southeast University, Nanjing, in 2007.
From June 2007 to October 2009, he was a Research Fellow with the Adastral Park Research Campus, University College London, London, U.K. He is currently with the faculty of the National Mobile Communications Research Laboratory, Southeast University. His research interests include space time wireless communications, random matrix theory, and information theory. He serves as an Associate Editor for the IEEE Transactions on Wireless Communications and IEEE Communications Letters.
Dr. Jin and his co-authors have been awarded the 2011 IEEE Communications Society Stephen O. Rice Prize Paper Award in the field of communication theory and a 2010 Young Author Best Paper Award by the IEEE Signal Processing Society.View more
Author image of Xiqi Gao
National Mobile Communications Research Laboratory, Southeast University, Nanjing, P. R. China
Xiqi Gao received the Ph.D. degree in electrical engineering from Southeast University, Nanjing, China, in 1997. He joined the Department of Radio Engineering, Southeast University, in April 1992. Since May 2001, he has been a professor of information systems and communications. From September 1999 to August 2000, he was a visiting scholar at Massachusetts Institute of Technology, Cambridge, and Boston University, Boston, MA. From August 2007 to July 2008, he visited the Darmstadt University of Technology, Darmstadt, Germany, as a Hum-boldt scholar. His current research interests include broadband multicarrier communications, MIMO wireless communications, channel estimation and turbo equalization, and multirate signal processing for wireless communications. He served as an Editor for the IEEE Transactions on Wireless Communications from 2007 to 2012. He now serves as an Associate Editor for the IEEE Transactions on Signal Processing.
Dr. Gao received the Science and Technology Awards of the State Education Ministry of China in 1998, 2006 and 2009, the National Technological Invention Award of China in 2011, and the 2011 IEEE Communications Society Stephen O. Rice Prize Paper Award in the field of communications theory.
Xiqi Gao received the Ph.D. degree in electrical engineering from Southeast University, Nanjing, China, in 1997. He joined the Department of Radio Engineering, Southeast University, in April 1992. Since May 2001, he has been a professor of information systems and communications. From September 1999 to August 2000, he was a visiting scholar at Massachusetts Institute of Technology, Cambridge, and Boston University, Boston, MA. From August 2007 to July 2008, he visited the Darmstadt University of Technology, Darmstadt, Germany, as a Hum-boldt scholar. His current research interests include broadband multicarrier communications, MIMO wireless communications, channel estimation and turbo equalization, and multirate signal processing for wireless communications. He served as an Editor for the IEEE Transactions on Wireless Communications from 2007 to 2012. He now serves as an Associate Editor for the IEEE Transactions on Signal Processing.
Dr. Gao received the Science and Technology Awards of the State Education Ministry of China in 1998, 2006 and 2009, the National Technological Invention Award of China in 2011, and the 2011 IEEE Communications Society Stephen O. Rice Prize Paper Award in the field of communications theory.View more
Author image of Kai-Kit Wong
Department of Electronic and Electrical Engineering, University College, London, UK
Kai-Kit Wong received the BEng, the MPhil, and the PhD degrees, all in Electrical and Electronic Engineering, from the Hong Kong University of Science and Technology, Hong Kong, in 1996, 1998, and 2001, respectively. His PhD thesis was on using MIMO antennas for multiuser wireless communications. Since August 2006, he has been with University College London, first at Adastral Park Campus and at present the Department of Electronic and Electrical Engineering, where he is a Reader in Wireless Communications.
He is a Senior Member of IEEE and is also on the editorial board of IEEE Wireless Communications Letters, IEEE Communications Letters, IEEE COMSoc/KICS Journal of Communications and Networks, and IET Communications. He is Senior Editor for the IEEE Communications Letters. He also served as Editor for IEEE Transactions on Wireless Communications from 2005–2011 and IEEE Signal Processing Letters from 2009–2012.
Kai-Kit Wong received the BEng, the MPhil, and the PhD degrees, all in Electrical and Electronic Engineering, from the Hong Kong University of Science and Technology, Hong Kong, in 1996, 1998, and 2001, respectively. His PhD thesis was on using MIMO antennas for multiuser wireless communications. Since August 2006, he has been with University College London, first at Adastral Park Campus and at present the Department of Electronic and Electrical Engineering, where he is a Reader in Wireless Communications.
He is a Senior Member of IEEE and is also on the editorial board of IEEE Wireless Communications Letters, IEEE Communications Letters, IEEE COMSoc/KICS Journal of Communications and Networks, and IET Communications. He is Senior Editor for the IEEE Communications Letters. He also served as Editor for IEEE Transactions on Wireless Communications from 2005–2011 and IEEE Signal Processing Letters from 2009–2012.View more
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