MU-MISO场景下最优化和速率的波束赋形

研究了在一个多用户的下行网络中,基于完美信道状态信息(CSI)的波束赋形设计问题.在该场景下,基站配备多天线,每一个用户为单天线.基站将采用发送波束赋形与用户进行通信.考虑在发送总功率受限的情况下,最大化所有用户的和速率.由于目标函数形式复杂并且是非凸的,导致求解困难.为此,提出了一种基于迫零准则的波束赋形方案.该方案将原问题分解为两个子问题,分别求解.仿真结果表明:相比于传统的基于SLNR的波束赋形方案,所提的方案的性能更好.

Beamforming design of sum rate optimization for MU-MISO scenario

This paper investigates the beamforming design based on perfect channel state information (CSI) in a multi-user downlink network.The base station (BS) is equipped with multiple antennas while each user is equipped with one antenna.The BS will communicate with users through transmit beamforming technology.This paper maximizes the sum rate of all users with the constraint of transmitting power.The object function is complex and non-convex which would bring difficulties to solve this problem.This article proposes a beamforming scheme based on zero-forcing criterion.Based on this method,the original problem will be divided into two sub-problems which can be solved respectively.The simulation results suggest that the proposed beamforming scheme achieves better performance compared with the traditional leakage based beamforming scheme.