Abstract
In this paper, we propose a new coordinated spatial multiplexing algorithm for multiuser multiple-input multiple-output (MIMO) downlink systems. Unlike other conventional coordination methods, our scheme exploits orthogonalized effective channels to yield the transmit precoding and receive combining matrices without requiring an iterative operation. In order to determine each row of the effective channels, a greedy type successive process is utilized. Simulation results show that the performance of our proposed scheme is very close to the conventional iterative scheme with significantly reduced complexity. Also, our method achieves a 3 dB performance gain over the conventional non-iterative scheme.
Original language | English |
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Article number | 6177988 |
Pages (from-to) | 1996-2001 |
Number of pages | 6 |
Journal | IEEE Transactions on Wireless Communications |
Volume | 11 |
Issue number | 6 |
DOIs | |
Publication status | Published - 2012 Jun |
Bibliographical note
Funding Information:Manuscript received May 27, 2011; revised November 15, 2011; accepted February 2, 2012. The associate editor coordinating the review of this letter and approving it for publication was M. Tao. J.-S. Kim was with the School of Electrical Engineering, Korea University, Seoul, Korea. He is now with the Bell Labs Seoul Ltd., Seoul, Korea (e-mail: jin_sung.kim@alcatel-lucent.com). S.-H. Moon was with the School of Electrical Engineering, Korea University, Seoul, Korea. He is now with the Electronics and Telecommunications Research Institute (ETRI), Daejeon, Korea (e-mail: sh.moon@etri.re.kr). I. Lee is with the School of Electrical Engineering, Korea University, Seoul, Korea (e-mail: inkyu@korea.ac.kr). This work was supported in part 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 Globecom, Dec. 2009. Digital Object Identifier 10.1109/TWC.2012.032712.111009
Keywords
- MIMO
- coordinated spatial multiplexing
- multiuser downlink
ASJC Scopus subject areas
- Computer Science Applications
- Electrical and Electronic Engineering
- Applied Mathematics