標題: Design of Robust Transceiver for Precoded Uplink MU-MIMO Transmission in Limited Feedback System
作者: Pan, Chien-Hung
電子工程學系及電子研究所
Department of Electronics Engineering and Institute of Electronics
關鍵字: Multi-user multiple-input multiple-output;Least-square;Minimum variance
公開日期: 1-七月-2014
摘要: This paper proposes a robust transceiver design against the effect of channel state information (CSI) estimation error to optimize precoded uplink (UL) multi-user multiple-input multiple-output (MU-MIMO) transmission in limited feedback system under the consideration of the least-square technique on CSI estimation. To improve this limited feedback precoding, the constrained minimum variance (MV) approach with quadratic form to realize the computationally-efficient optimization problem, advantageously invoking the characteristics of the CSI estimation error, is proposed to suppress the effect of CSI estimation error, multiple user interference and noise. According to the Lagrange multiplier method on this MV approach, the deterministic function to resist uncertain CSI can be obtained to optimize design of the precoder and adaptive matrices jointly. With these optimum adaptive and precoder matrices, an optimum robust weighting matrix can be obtained to facilitate the user-wise detection in precoded UL MU-MIMO system. Performance analysis shows that the proposed robust weighting matrix is an unbiased design and it also can regularize the diagonal loading factor technique, and the detection performance of the proposed robust transceiver design can be predicted simplistically by applying our derived signal-to-interference-plus-noise ratio formulation. Computer simulations are conducted to confirm the efficacy of the proposed design in both perfect and imperfect CSI estimation.
URI: http://dx.doi.org/10.1007/s11277-013-1540-y
http://hdl.handle.net/11536/147700
ISSN: 0929-6212
DOI: 10.1007/s11277-013-1540-y
期刊: WIRELESS PERSONAL COMMUNICATIONS
Volume: 77
起始頁: 857
結束頁: 879
顯示於類別:期刊論文