Signal to Leakage and Noise Ratio Based Beamforming and User Scheduling for TD-LTE-A Systems

Abstract:

In TD-LTE-A downlink, signal to leakage and noise ratio (SLNR) based beamforming can eliminate the co-channel interference and noise for multi-user MIMO mode effectively and can be realized more easily than the traditional ideal SINR based algorithms. Moreover, user scheduling can be combined with the SLNR based beamforming algorithm to obtain a better performance. Hence, in this paper, SLNR based beamforming is firstly compared with traditional beamforming algorithms, and then, a suboptimal maximum minimum SLNR (MMSLNR) scheduling strategy is proposed to improve the average BER performance and sum capacity of TD-LTE-A system and decrease the scheduling complexity as well.

• Periodical: Advanced Materials Research (Volumes 760-762)
• Pages: 551-555
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.760-762.551
• Online since: September 2013
• Authors: Xuan Li Wu, Ming Xin Luo, Lun Kuan Sun, Nan Nan Fu
• Keywords: Beam-Forming, Maximum Minimum SLNR, Signal Leakage Noise Ratio (SLNR)

References

[1] L J. Liu, R. H. Chen, S. GEIRHOFER, et al. Downlink MIMO in LTE-advanced: SU-MIMO vs. MU-MIMO [J]. IEEE Communications Magazine, 2012, 50(2): 140-147.

DOI: 10.1109/mcom.2012.6146493

[2] W. Wang; H. Zhao; L. Han. Dual-Stream Beamforming Based HARQ Schemes for LTE-Advanced System [C]. Wireless Communications, Networking and Mobile Computing, Sept. 2009: 1-4.

DOI: 10.1109/wicom.2009.5305377

[3] Weingarten H, Steinberg Y, Shamai S. The Capacity Region of the Gaussian Multiple-Input Multiple-Output Broadcast Channel [J]. IEEE Transactions on Information Theory, 2006, 52(9): 3936-3964.

DOI: 10.1109/tit.2006.880064

[4] C. Windpassinger, R. F. H. Fischer, T. Vencel, et al. Precoding in Multiantenna and Multiuser Communications [J]. IEEE Transactions on Wireless Communications, 2004, 3(4): 1305-1336.

DOI: 10.1109/twc.2004.830852

[5] M. Vu, A. Paulraj. MIMO wireless linear precoding [J]. IEEE Signal Process Mag., 2007, 24(5): 86-105.

DOI: 10.1109/msp.2007.904811

[6] Z. Shen, R. Chen, J. G. Andrews, R. W. Heath, Jr., and B. L. Evans. Sum capacity of multiuser MIMO broadcast channels with block diagonalization [J]. IEEE Transactions on Wireless Communications, 2007, 6(6): 2040~(2045).

DOI: 10.1109/twc.2007.05831

[7] K. Wong, R. Cheng, K. B. Letaeif, et al. Adaptive Antennas at the Mobile and Base Stations in an OFDM/TDMA System [J]. IEEE Transactions on Communications, 2001, 49(1): 195-206.

DOI: 10.1109/26.898262

[8] M. Yoon, M. Kim, C. Lee. Decentralized Precoding Algorithm with Weighted SLNR for Limitedly Coordinated Network [J]. IEEE Communications Letter, 2012, 16(3): 318-320.

DOI: 10.1109/lcomm.2012.010512.112037

[9] M. Sadek, A. Tarighat, A. H. Sayed. A Leakage-Based Precoding Scheme for Downlink Multi-User MIMO Channels [J]. IEEE Transactions on Wireless Communications, 2007, 6(5): 1711-1721.

DOI: 10.1109/twc.2007.360373