Improved lattice reduction‐aided linear precoding in MIMO systems with limited feedback. Issue 13 (1st June 2016)

• Record Type: Journal Article
• Authors: Jiang, Hua; Shen, Lizhen; Wang, Tianjing; Liu, Guoqing
• Is Part Of: Electronics letters. Volume 52:Issue 13(2016)
• Page Start: 1183
• Page End: 1185
• Publication Date: 2016-06-01
• Subjects: lattice theory -- precoding -- MIMO communication -- matrix algebra -- Gaussian processes -- error statistics; MIMO systems -- limited feedback -- scaling constellation -- shifting constellation -- MIMO lattice reduction‐aided precoding -- BER -- ergodic capacity -- Gaussian integer matrix -- modulo operation -- system performance improvement; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2016.0946
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : An approach of scaling and shifting constellation for MIMO lattice reduction(LR)‐aided precoding is proposed. The proposed scheme is beneficial to improve the performance in terms of both BER and ergodic capacity. The feedback is a Gaussian integer matrix in which the entries are preserved in a region with respect to modulo operation. Then, the amount of feedback information is reduced significantly. Simulation results show that the LR‐aided precoding scheme using the improved version of the constellation apparently improves system performance.