基于時間-調頻斜率分布的多普勒調頻率估計

汪金真; 宿紹瑩; 陳曾平

doi:10.11999/JEIT150116

基于時間-調頻斜率分布的多普勒調頻率估計

doi: 10.11999/JEIT150116

計量
- 文章訪問數: 1614
- HTML全文瀏覽量: 130
- PDF下載量: 506
- 被引次數: 0
出版歷程
- 收稿日期: 2015-01-21
- 修回日期: 2015-03-13
- 刊出日期: 2015-09-19

Estimation of Doppler Rate Based on Time-chirp Distribution

摘要

摘要: 該文提出基于時間-調頻斜率分布(TCD)的目標回波線性調頻(LFM)信號的多普勒調頻斜率估計算法。分析目標回波LFM信號的TCD表明自項和交叉項均在多普勒調頻斜率處取得極大值，采用垂直調頻斜率軸投影積分可以有效抑制TCD的非多普勒調頻斜率交叉項及噪聲，增強多普勒調頻斜率項。同時，采用二次搜索方法搜索TCD投影積分量最大值保證多普勒調頻斜率估計精度，有效減少運算量；理論分析表明，通過合理控制搜索步長，可以使得計算耗時在一定條件下最小。仿真實驗驗證了該方法的有效性，該方法具有較高的估計精度以及抗噪性能。
- 信號處理 /
- 目標回波 /
- 多散射點 /
- 線性調頻 /
- 多普勒調頻斜率 /
- 時間-調頻斜率分布
Abstract: Based on the analysis of the instantaneous phase characteristics of the echo Linear Frequency Modulated (LFM) signals respectively from single and multiple scatter point targets, an algorithm of the Doppler chirps estimation based on the Time-Chirp Distribution (TCD) of echo LFM signals from targets is proposed, in which the projection integral vertical to the chirp axis is adopted to enhance the Doppler chirps term of the TCD, but to suppress non-Doppler chirps cross term of the TCD and noise. Simultaneously, two-time search method is taken to obtain the maximum value of the TCDs projection integral to guarantee the estimation accuracy of the Doppler chirp and effectively reduce the amount of computation. The theoretical analysis shows that the time-consuming of calculation can be controlled to the minimum in the appropriate search step. Simulation results show the effectiveness of this method that it has higher estimation accuracy and good immunity for noise.
- Signal processing /
- Target echo /
- Multiple scatter point /
- Linear Frequency Modulated (LFM) /
- Doppler chirp /
- Time-Chirp Distribution (TCD)

HTML全文

參考文獻(25)

Tao R, Feng Y, and Wang Y. Theoretical and experimental study of a signal feature extraction algorithm for measuring propeller acceleration in a port surveillance system[J]. IET Radar, Sonar Navigation, 2011, 5(2): 172-181.

金勝, 王峰, 鄧振淼, 等. 一種LFM信號相位域快速高精度參數估計算法[J]. 系統工程與電子技術, 2011, 33(2): 264-267.

Jin Sheng, Wang Feng, Deng Zhen-miao, et al.. Fast and accurate estimator on parameters of chirp signals in phase domain[J]. Systems Engineering and Electronics, 2011, 33(2): 264-267.

牛萌, 李釗, 朱曉光, 等. LFM信號參數估計的最大似然改進算法[J]. 無線電通信技術, 2009, 35(3): 59-61.

Niu Meng, Li Zhao, Zhu Xiao-guang, et al.. Improved maximum likelihood estimation algorithm to estimate parameters of LFM signal[J]. Radio Communications Technology, 2009, 35(3): 59-61.

Wang J Z, Su S Y, and Chen Z P. Parameter estimation of chirp signal under low SNR[J]. Science China Information Sciences, 2015, 58: 020307(13).

Chen G H, Ma S W, Qin T H, et al.. Geometry- information-aided efficient motion parameter estimation for moving-target imaging and location[J]. IEEE Geoscience and Remote Sensing Letters, 2015, 12(1): 155-159.

Zeng D, Zeng X, and Tang B. Automatic modulation classification of radar signals using the Rihaczek distribution and Hough transform[J]. IET Radar, Sonar Navigation, 2012, 6(5): 322-331.

Jia S Y, Wang G H, and Tan S C. Radial acceleration estimation of multiple high maneuvering targets[J]. Journal of Systems Engineering and Electronics, 2014, 25(2): 183-193.

Miah K and Potter D. Geophysical signal parameterization and filtering using the fractional Fourier transform[J]. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2014, 7(3): 845-852.

Wu L, Wei X Z, Yang D G, et al.. ISAR Imaging of targets with complex motion based on discrete chirp Fourier transform for cubic chirps[J]. IEEE Transactions on Geoscience and Remote Sensing, 2012, 50(10): 4201-4212.

高春霞, 張?zhí)祢U, 金翔, 等. 基于離散多項式變換的寬帶線性調頻信號波達方向估計[J]. 計算機應用, 2011, 31(10): 2872-2875.

Gao Chun-xia, Zhang Tian-qi, Jin Xiang, et al.. Arrival direction estimation of wideband linear frequency modulation signal based on DPT[J]. Journal of Computer Application, 2011, 31(10): 2872-2875.

龐存鎖. 基于離散多項式相位變換和分數階傅里葉變換的加速目標檢測算法[J]. 電子學報, 2012, 40(1): 184-188.

Pang Cun-suo. An accelerating target detection algorithm based on DPT and fractional Fourier transform[J]. Acta Electronica Sinica, 2012, 40(1): 184-188.

Peter O. A fast algorithm for estimating the parameters of a quadratic FM signal[J]. IEEE Transactions on Signal Processing, 2004, 52(2): 385-393.

Maree F and Peter O. Extending the performance of the cubic phase function algorithm[J]. IEEE Transactions on Signal Processing, 2007, 55(10): 4767-4774.

杜雨洺, 楊建宇. 基于時間-調頻斜率分布的多線性調頻信號檢測與參數估計[J]. 電子與信息學報, 2007, 29(3): 631-634.

Du Yu-ming and Yang Jian-yu. Superimposed LFM signals detection and parameter estimation based on time-frequency rate distribution[J]. Journal of Electronics Information Technology, 2007, 29(3): 631-634.

杜雨洺, 楊建宇. LFM信號時間調-頻斜率分布交叉項抑制方法[J]. 系統工程與電子技術, 2010, 32(2): 229-231.

Du Yu-ming and Yang Jian-yu. Elimination of cross terms of time-frequency rate of LFM signals[J]. Systems Engineering and Electronics, 2010, 32(2): 229-231.

李利, 司錫才, 張雯雯, 等. 改進的多分量LFM信號參數估計算法及快速實現[J]. 系統工程與電子技術, 2009, 31(11): 2560-2562.

Li Li, Si Xi-cai, Zhang Wen-wen, et al.. Improved estimation algorithm of multi-component LFM signal parameters and its fast implementation[J]. Systems Engineering and Electronics, 2009, 31(11): 2560-2562.

于媛. 基于Radon變換的LFM信號檢測與參數估計[J]. 現代防御技術, 2014, 41(1): 136-141.

Yu Yuan. Detection and parameter estimation of linear frequency modulated signals based on Radon transform[J]. Modern Defense Technology, 2013, 41(1): 136-141.

施引文獻

資源附件(0)

訪問統計