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一种引入相位补偿的直接时延估计算法
An explicit time delay estimation algorithm with phase compensation
投稿时间:2017-03-15  修订日期:2017-05-07
中文关键词:时延估计  下变频  相差  相位补偿器
英文关键词:time delay estimation  down-conversion  phase difference  phase compensator
基金项目:中国工程物理研究院科学技术发展基金资助项目(2015A0403001)
作者单位
伍 警 a.Institute of Electronic EngineeringChina Academy of Engineering Physicsb.Graduate SchoolChina Academy of Engineering PhysicsMianyang Sichuan 621999China 
蒋鸿宇 Institute of Electronic EngineeringChina Academy of Engineering PhysicsMianyang Sichuan 621999China 
李 兵 Graduate SchoolChina Academy of Engineering PhysicsMianyang Sichuan 621999China 
胡茂海 Institute of Electronic EngineeringChina Academy of Engineering PhysicsMianyang Sichuan 621999China 
邢政利 Graduate SchoolChina Academy of Engineering PhysicsMianyang Sichuan 621999China 
摘要点击次数: 98
全文下载次数: 76
中文摘要:
      在多天线信号合成技术中,合成系统需在中频完成各信号间时延差估计与补偿,以便进行信号合成,提高接收质量。分析发现,利用同一本振对两路信号下变频会引入新的相差,该相差将导致直接时延估计算法性能下降。通过在直接时延估计算法(ETDE)基础上增加一个相位补偿因子,将时延与相差进行解耦,利用相位补偿因子来修正相差,最终实现偏时延估计。理论分析与仿真结果均表明,该算法能够不受相差的影响准确估计时延并进行跟踪,相比相差下的直接时延估计算法,该算法的收敛速度提升1+3(ω/π)2 倍,并且估计性能改善3 dB以上。
英文摘要:
      In order to improve signal quality,the combined system needs to complete the time delay estimation and compensation between intermediate-frequency signals in the multi-antenna combining technology. The newly introduced phase difference when using same local oscillator to make frequency conversion to the two signals will malfunction the Explicit Time Delay Estimation(ETDE) algorithm. To realize the unbiased time delay estimation,an adjustable phase compensator is added to the ETDE algorithm to decouple the time delay and the phase difference. Theoretical analysis and simulation results indicate that the novel algorithm can estimate and track the time delay accurately regardless of phase difference, with 1+3(ω/π)2 faster convergence rate and at least 3 dB smaller variances compared to the ETDE algorithm with no phase difference.
引用本文:伍 警,蒋鸿宇,李 兵,胡茂海,邢政利.一种引入相位补偿的直接时延估计算法[J].太赫兹科学与电子信息学报,2018,16(4):697~702
DOI:10.11805/TKYDA201804.0697
学科分类代码:
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