Frequency Domain Synthetic Bandwidth Approach for High Speed Moving Target

张焕颖; 张守宏; 邢孟道; 李强; 罗斌凤

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Frequency Domain Synthetic Bandwidth Approach for High Speed Moving Target

更新时间：2025-12-08

- Frequency Domain Synthetic Bandwidth Approach for High Speed Moving Target
- Vol. 41, Issue 10, Pages: 1184-1187+1201(2007)
- 作者机构：
  
  西安电子科技大学雷达信号处理国家重点实验室,西安,710071
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN956
- Online First：10 October 2007，
  
  Published：2007
- 稿件说明：
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张焕颖, 张守宏, 邢孟道, et al. Frequency Domain Synthetic Bandwidth Approach for High Speed Moving Target[J]. 2007, 41(10): 1184-1187+1201.
DOI：

张焕颖, 张守宏, 邢孟道, et al. Frequency Domain Synthetic Bandwidth Approach for High Speed Moving Target[J]. 2007, 41(10): 1184-1187+1201. DOI：

摘要

为了利用线性调频步进雷达获得高速运动目标的高分辨距离像

提出了基于高速运动模型的频域合成带宽方法.该方法根据运动目标雷达回波的精确模型建立运动补偿因子

并在时域将回波信号与频域频谱搬移的误差频率混频

以消除频域频谱搬移误差的影响.与传统的基于低速运动模型的合成带宽法相比

所提方法对高速运动目标回波补偿后不存在子脉冲频谱的初相补偿误差和失配误差

具有更高的补偿精度.针对高速运动目标的仿真结果表明

在采用海明窗加权的情况下

与基于低速运动模型的频域合成带宽法相比

所提方法得到的距离像没有出现栅瓣且副瓣电平在-42 dB以下.

Abstract

In order to utilize the linear modulated stepped frequency radar to acquire the high resolution range profile of the high speed moving target

an improved frequency domain synthetic bandwidth approach is proposed. In the approach

the motion compensation factor is established in terms of the precise echo model of the moving target

and the error of spectrum shift in the frequency domain is eliminated by mixing the echo signal and the error frequency. Compared to the traditional synthetic bandwidth approach based on the low speed moving target model

the proposed method avoids the initial-phase compensation error and unmatched error of the subpulse's spectrum after compensating the high speed target echo

and possesses higher compensation precision. Aiming at the high speed moving target

the simulation results show that under the case that the Hamming window is used to weight the synthetic spectrum

the target range profile does not have grating lobe and the peak-to-side lobe ratio of that is -42 dB below.

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Keywords

references

Wilkinson A J, Lord R T, Inggs M R. Stepped-frequency processing by reconstruction of target reflectivity spectrum [C]∥Proceedings of the 1998 South African Symposium. Piscataway, USA:IEEE, 1998:101-104.

Nel W, Tait J, Lord, R, et al. The use of a frequency domain stepped frequency technique to obtain high range resolution on the CSIR X-band SAR system [C]∥African Conference in Africa. Piscataway, USA:IEEE, 2002:327-332.

姚萍, 郑天垚, 王贞松. 线性调频步进式合成孔径雷达系统的信号处理[J]. 系统工程与电子技术, 2006,28(2):159-162.

Yao Ping,Zheng Tianyao,Wang Zhensong. Signal processing for the SAR system based on LFM subpulses with carrier frequencies increased step by step [J]. Systems Engineering and Electronics, 2006, 28(2):159-162.

张云华,李海滨,伍捷. 步进频率线性调频脉冲信号的子孔径处理方法[J]. 系统工程与电子技术,2006,28(1):1-6.

Zhang Yunhua, Li Haibin, Wu Jie. Subaperture processing method for stepped-frequency Chirp signal [J]. Systems Engineering and Electronics,2006,28(1):1-6.

Zhang Yunhua, Wu Jie, Li Haibin. Two simple and efficient approaches for compressing stepped chirp signals [C]∥Asia-Pacific Conference Microwave Proceedings. Piscataway, USA:IEEE, 2005:327-332.

Berens P. SAR with ultra-high range resolution using synthetic bandwidth [C]∥IEEE Geoscience Remote Sensing Symposium. Piscataway, USA:IEEE,1999:1752-1754.

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