非对称定时同步对协作多点下行传输的影响

doi:10.3969/j.issn.1001-506X.2014.05.28

系统工程与电子技术

非对称定时同步对协作多点下行传输的影响

顾浙骐，魏宁，张忠培

电子科技大学通信抗干扰技术国家重点实验室，四川成都 611731

出版日期:2014-05-22 发布日期:2010-01-03

Impact of asymmetry timing synchronization on downlink coordinated multi-point transmission

GU Zhe-qi，WEI Ning，ZHANG Zhong-pei

National Key Laboratory of Science and Technology on Communication, University of Electronic Science and Technology of China, Chengdu 611731, China

Online:2014-05-22 Published:2010-01-03

摘要/Abstract

摘要：

协作多点（coordinated multipoint, CoMP）传输的非对称定时同步特性会对其时分双工（time division duplex，TDD）模式带来新的信道互易性误差。研究了由非对称同步时偏造成的等效信道互易性误差，建立了定时同步互易性误差（timing synchronization reciprocity error, TSRE）的数学模型。基于该模型的概率分布，通过矩阵分解和子空间投影，推导出CoMP系统下行传输中用户速率损失上界。同时通过此上界表达式，分析了在不同CoMP系统参数设定条件下，此类互易性误差对下行预编码造成的性能损失。仿真结果对理论分析进行了验证。

Abstract:

The asymmetric timing synchronization of the coordinated multipoint (CoMP) transmission brings new channel reciprocity errors in the time division duplex (TDD) mode. The timing synchronization reciprocity error (TSRE) is investigated and mathematically modeled. Due to the distribution of TSRE, matrix decomposition and subspace projection are used to derive the upper bound of the peruser rate loss on CoMP downlink transmission. Through the formulas of the upper bound, the performance degradation of the precoding algorithm with different system parameters is analyzed. Simulation results validate the theoretical analysis.

顾浙骐，魏宁，张忠培. 非对称定时同步对协作多点下行传输的影响[J]. 系统工程与电子技术, doi: 10.3969/j.issn.1001-506X.2014.05.28.

GU Zhe-qi，WEI Ning，ZHANG Zhong-pei. Impact of asymmetry timing synchronization on downlink coordinated multi-point transmission[J]. Systems Engineering and Electronics, doi: 10.3969/j.issn.1001-506X.2014.05.28.

非对称定时同步对协作多点下行传输的影响

Impact of asymmetry timing synchronization on downlink coordinated multi-point transmission

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