摘要
针对非对称的多用户MIMO双向中继干扰信道,本文提出了一种简化的基于最大信干噪比的干扰对齐算法,给出了信号对齐和干扰抑制可行性条件及其方案,并分析了系统容量和自由度。本文算法的中继节点不必做复杂的信号处理,大大降低了整个系统的信号处理复杂度;同时,本文算法是基于最大信干噪比方案,与现有文献的中继迫零方案比较,大大提高了系统在中低信噪比时的容量;进一步,分析证明了基于本文算法的K用户对双向中继干扰网络的自由度可以达到2sum from i=1 to K d_i。
In this paper,we propose a simplified interference alignment algorithm based on the maximum signal to interference noise ratio（Max-SINR） algorithm for the asymmetric multi-pair two-way MIMO relaying interference channel.Then,we derive the feasibility conditions of signal alignment and interference suppression scheme in the system,so as to analyze the degree of freedom（DOF） and sum rate of the system.The relay node in this article do not have to do complex signal processing,greatly reduces the signal processing complexity of the entire system.Besides this,the proposed scheme is based on Max-SINR algorithm and provides a considerable performance gain at low and intermediate P compared with existing relay zero forcing programs.Furthermore,the brief theoretical analysis and numerical simulations have shown that the degrees of freedom（DOF） achievable by interference alignment in K user pair two-way relaying interference networks are 2sum from i=1 to K d_i。
出处
《信号处理》
CSCD
北大核心
2013年第7期880-887,共8页
Journal of Signal Processing
基金
国家自然科学基金(61271259)
重庆市自然科学基金(CTSC2011JJA40006
CSTC2010BB2415)
重庆市教委科学技术研究项目(KJ120501
KJ120502
KJ1105300)
重庆市科委重点实验室专项经费
