Vector Perturbation Precoding for Multi-User CoMP Downlink Transmission
作者： Sanjeewa P. Herath , Duy H. N. Nguyen , Tho Le-Ngoc
DOI: 10.1109/ACCESS.2015.2475237
关键词: Precoding 、 Control theory 、 Zero-forcing precoding 、 Base station 、 Telecommunications link 、 Interference alignment 、 Perturbation (astronomy) 、 Algorithm 、 Multi-user 、 Computer science
摘要: This paper focuses on the design of vector perturbation (VP) precoding for coordinated multi-point (CoMP) multi-user downlink transmission. Precoding is performed by individual base stations (BSs) in a distributed manner using only channel coefficients and user data local to BS. A cascade precoder structure with an outer managing inter-cell interference (ICI) inner performing mean-squared-error (MSE) minimization-based VP mitigate intra-cell proposed. Three different techniques are considered. In first technique, designed fully eliminate ICI trading off degrees freedom (DoFs) available through multiple antennas. While proposed technique outperforms existing conventional-VP based designs, large portion DoF consumed elimination. To overcome this issue, second alignment-based that minimizes total leakage further improve system performance, third approach, joint minimization plus MSE performed. Numerical results show efficient way use CoMP
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