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非对称定时同步对协作多点下行传输的影响 被引量：1

Impact of asymmetry timing synchronization on downlink coordinated multi-point transmission
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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。 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 sub-space 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 parame-ters is analyzed.Simulation results validate the theoretical analysis.
作者 顾浙骐 魏宁 张忠培
机构地区 电子科技大学通信抗干扰技术国家重点实验室
出处 《系统工程与电子技术》 EI CSCD 北大核心 2014年第5期985-990,共6页 Systems Engineering and Electronics
基金 国家自然科学基金(61101092) 国家重大科研专项(2012ZX03001027 001) 中央高校基本科研业务费专项资金(ZYGX2010J010)资助课题
关键词 无线通信 协作通信 预编码 定时同步 信道互易性 wireless communication coordinated multi-point （CoMP） precoding timing synchronization channel reciprocity
分类号 TN911.6 [电子电信—通信与信息系统]
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参考文献14

  • 1Daewon L, Hanbyul S, Clerckx B, et al. Coordinated multipoint transmission and reception in LTE-advanced: deployment sce- narios and operational challenges [J]. IEEE Communications Magazine, 2012, 50(2) : 148 - 155.
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系统工程与电子技术
2014年 第5期

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