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下行链路协作传输技术的相位噪声分析

ANALYSIS OF PHASE NOISE FOR DOWNLINK COORDINATED TRANSMISSION
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摘要 在多个使用正交频分复用(OFDM)进行下行传输的蜂窝网络小区中,下行链路协作传输技术能提高蜂窝网络边缘用户的频谱效率和消除干扰。但是因为各小区发送端定时误差和频移的不同,导致各基站产生不同的相位噪声,进而使得传输过程产生符号间干扰(ISI)和载波间干扰(ICI),这会严重影响下行链路协作传输的性能。本文分析了下行链路协作传输复合信道模型、时延对定时误差影响和本振对相位噪声影响,给出了不同场景下不同的相位噪声特性对系统性能影响的仿真结果。 Downlink coordinated transmission technology can improve the spectral efficiency of edge users and eliminate the inter-user interference.However,when orthogonal frequency division multiplexing（OFDM） scheme is exploited for downlink joint processing,the timing error and carrier frequency offset lead to different phase noise for base stations,inducing inter-symbol interference（ISI） and inter-carrier interference（ICI）,which degrades the downlink coordinated system performance.In this paper,the effect of phase noise and timing error on system performance are analyzed based on the compound downlink coordinated channel model,respectively.Simulation results are shown for the different scenarios.
作者 郑涛
机构地区 中国民用航空飞行学院纪委
出处 《山东农业大学学报（自然科学版）》 CSCD 北大核心 2012年第1期84-89,共6页 Journal of Shandong Agricultural University：Natural Science Edition
关键词 下行链路 协作传输 OFDM 相位噪声 Downlink Coordinated Transmission OFDM Phase Noise
分类号 TN911 [电子电信—通信与信息系统]
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参考文献14

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二级参考文献8

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山东农业大学学报（自然科学版）
2012年 第1期

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