多天线节点多中继干扰网络中的分布式多流波束形成

C. M. Yetis, Ronald Y. Chang
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引用次数: 0

摘要

本文研究了存在直接链路的干扰网络中由多个放大转发(AF)中继辅助的多流传输问题。目标是在流信噪比(SINR)目标约束下,通过分布式发射波束形成优化,使发射机和中继的总功率最小。我们采用乘法器交替方向法(ADMM)算法进行分布式实现。该优化问题是一个著名的非凸NP-hard二次约束二次规划(QCQP)问题,该问题经过半定松弛(SDR)后,可以通过ADMM进行最优求解。该算法在收敛速度、计算复杂度和消息交换负载等方面均优于现有的分布式算法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Distributed Multi-Stream Beamforming in Multi-Relay Interference Networks with Multi-Antenna Nodes
In this paper, multi-stream transmission in interference networks aided by multiple amplify-and-forward (AF) relays in the presence of direct links is studied. The objective is to minimize the sum power of transmitters and relays by distributed transmit beamforming optimization under the stream signal-to-interference-plus-noise-ratio (SINR) target constraints. We utilize alternating direction method of multipliers (ADMM) algorithm for distributed implementation. The optimization problem is a well-known non-convex NP-hard quadratically constrained quadratic program (QCQP), which, after semi-definite relaxation (SDR), can be optimally solved via ADMM. The convergence rate, computational complexity, and message exchange load of the proposed algorithm are shown to outperform the existing distributed algorithm.
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