基于时间-调频斜率分布的多普勒调频率估计

汪金真; 宿绍莹; 陈曾平

doi:10.11999/JEIT150116

基于时间-调频斜率分布的多普勒调频率估计

doi: 10.11999/JEIT150116

计量
- 文章访问数: 1525
- HTML全文浏览量: 113
- PDF下载量: 505
- 被引次数: 0
出版历程
- 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: 该文提出基于时间-调频斜率分布(TCD)的目标回波线性调频(LFM)信号的多普勒调频斜率估计算法。分析目标回波LFM信号的TCD表明自项和交叉项均在多普勒调频斜率处取得极大值，采用垂直调频斜率轴投影积分可以有效抑制TCD的非多普勒调频斜率交叉项及噪声，增强多普勒调频斜率项。同时，采用二次搜索方法搜索TCD投影积分量最大值保证多普勒调频斜率估计精度，有效减少运算量；理论分析表明，通过合理控制搜索步长，可以使得计算耗时在一定条件下最小。仿真实验验证了该方法的有效性，该方法具有较高的估计精度以及抗噪性能。
- 信号处理 /
- 目标回波 /
- 多散射点 /
- 线性调频 /
- 多普勒调频斜率 /
- 时间-调频斜率分布
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

参考文献(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.

金胜, 王峰, 邓振淼, 等. 一种LFM信号相位域快速高精度参数估计算法[J]. 系统工程与电子技术, 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, 李钊, 朱晓光, 等. LFM信号参数估计的最大似然改进算法[J]. 无线电通信技术, 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, 张天骐, 金翔, 等. 基于离散多项式变换的宽带线性调频信号波达方向估计[J]. 计算机应用, 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.

庞存锁. 基于离散多项式相位变换和分数阶傅里叶变换的加速目标检测算法[J]. 电子学报, 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, 杨建宇. 基于时间-调频斜率分布的多线性调频信号检测与参数估计[J]. 电子与信息学报, 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, 杨建宇. LFM信号时间调-频斜率分布交叉项抑制方法[J]. 系统工程与电子技术, 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, 司锡才, 张雯雯, 等. 改进的多分量LFM信号参数估计算法及快速实现[J]. 系统工程与电子技术, 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变换的LFM信号检测与参数估计[J]. 现代防御技术, 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.

施引文献

资源附件(0)

访问统计