| 高分辨率多径时延测量算法 |
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| 引用本文： | 黎英云,马洪.高分辨率多径时延测量算法[J].上海航天,2010,27(6):52-56. |
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| 作者姓名： | 黎英云 马洪 |
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| 作者单位： | [1]华中科技大学信息学院,湖北武汉430074 [2]武汉光电国家实验室（筹）,湖北武汉430074 |
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| 基金项目： | 国家自然科学基金，航天支撑技术基金 |
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| 摘 要： | 提出一种基于最小二乘准则的高分辨率多径信号时延测量方法。对参考信号作三阶样条插值获得每条多径信号最小二乘意义的最优估计,用每条多径信号的测量值重构接收信号,通过反复迭代使重构信号是接收信号最小二乘意义的最优估计,实现多径信号的时延测量。仿真结果表明：新算法在低信噪比、窄带信号条件下仍能获得较高的时延测量精度,性能优于MUSIC类时差测量算法。
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| 关 键 词： | 时延测量 窄带多径信号 最小二乘准则 三阶样条插值 |
High-Resolution Algorithm of Time Delay Estimation in Multipath Environments |
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| LI Ying-yun,MA Hong.High-Resolution Algorithm of Time Delay Estimation in Multipath Environments[J].Aerospace Shanghai,2010,27(6):52-56. |
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| Authors: | LI Ying-yun MA Hong |
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| Institution: | 1.Department of Electronics and Information Engineering,Huazhong University of Science and Technology,Wuhan Hubei 430074,China;2.Wuhan National Lab for Optoelectronics,Wuhan Hubei 430074,China) |
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| Abstract: | A new high-resolution algorithm for time delay estimation of multipath propagation signals based on least square criterion was proposed in this paper. The received data was decomposed into the signal components and then to estimate the amplitude and time delay of each signal component separately,while the cubic spline interpolation being used and based on least square criterion.The received data was reconstructed by signal components through iterated back and forth to let the reconstructs data to be the best estimation of the received data.The simulation results showed that the algorithm was very robust under the low signal-to-noise ratio（SNR）,which could provide high-resolution and accuracy time delay estimation in low SNR,narrowband signal and multipath environments and have the better performance than multiple-signal-classification（MUSIC） method of time difference measurement. |
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| Keywords: | Time delay estimation Narrowband signal multipath signals Least square criterion Cubic spline interpolation |
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