基于有限反馈的多小区协作迫零预编码  

Coordinated Multicell Zero-forcing Precoding with Limited Feedback

作　　者：张瑞[1] 傅洪亮[1] 宋荣方[2] 

机构地区：[1]河南工业大学信息科学与工程学院,河南郑州450001 [2]南京邮电大学通信与信息工程学院,江苏南京210003

出　　处：《四川大学学报（工程科学版）》2012年第6期148-153,共6页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家自然科学基金资助项目(60972041;271234;河南省科技创新杰出青年基金资助项目(104100510008)

摘　　要：为了同时抑制小区间干扰和用户间干扰,在多小区多用户系统中,基站通过共享CSI,采用小区间干扰清零(ICIN)预编码算法,将2种干扰迫零。在该算法的基础上,提出了有限反馈情况下的自适应比特分配算法以最小化量化误差引起的速率损耗,更有效地利用反馈比特资源。并且,给出速率损耗保持恒定时,用户所需的总反馈比特数的变化规律。仿真结果表明,提出的自适应比特分配算法优于等比特分配算法,并且采用自适应比特分配时系统速率损耗较小,而复用增益与准确CSI时相同。An adaptive feedback bit allocation scheme based on inter-cell interference nulling（ICIN） was proposed to minimize the rate loss due to limited feedback, and bit resource was efficiently utilized. Furthermore, the scaling law of the total number of bits per user to maintain a constant rate loss was investigated. Simulation results showed that the proposed feedback bits allocation strategy provides significant gain compared to equal bits allocation. Besides, the strategy kepts the same multiplexing with the case of perfect CSI at a lower rate loss.

关 键 词：自适应反馈 多小区协作 随机矢量量化 小区间干扰清零 

分 类 号：TN929[电子电信—通信与信息系统]