Research on Keystone Transform Implementation Methods

ZHANG Liang; ZHANG Xiang-yu; WANG Guo-hong

doi:10.12263/DZXB.20210464

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Research on Keystone Transform Implementation Methods

PAPERS | 更新时间：2025-12-08

- Research on Keystone Transform Implementation Methods
- ACTA ELECTRONICA SINICA Vol. 50, Issue 5, Pages: 1218-1226(2022)
- 作者机构：
  
  1.海军航空大学信息融合研究所,山东烟台 264001
  2.中国人民解放军94326部队,山东济南 250000
  3.海军航空大学航空电子与指挥系,山东青岛 266041
  4.中北大学信息与通信工程学院,山西太原 030023
- 作者简介：
- 基金信息：
- DOI：10.12263/DZXB.20210464
  CLC： TN957
- Received：12 April 2021，
  
  Revised：2021-11-25，
  
  Published：25 May 2022
- 稿件说明：
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张亮,张翔宇,王国宏.Keystone变换实现方法研究[J].电子学报,2022,50(05):1218-1226.

ZHANG Liang,ZHANG Xiang-yu,WANG Guo-hong.Research on Keystone Transform Implementation Methods[J].ACTA ELECTRONICA SINICA,2022,50(05):1218-1226.
张亮,张翔宇,王国宏.Keystone变换实现方法研究[J].电子学报,2022,50(05):1218-1226. DOI： 10.12263/DZXB.20210464.

ZHANG Liang,ZHANG Xiang-yu,WANG Guo-hong.Research on Keystone Transform Implementation Methods[J].ACTA ELECTRONICA SINICA,2022,50(05):1218-1226. DOI： 10.12263/DZXB.20210464.

摘要

Keystone变换（Keystone Transform，KT）是一种经典的雷达目标距离走动校正工具，现有诸多实现方法中以基于线性调频Z变换（Chirp-Z Transform，CZT）和快速傅里叶逆变换（Inverse Fast Fourier Transform，IFFT）的“CZT+IFFT”方法计算量最低.本文针对“CZT+IFFT”方法存在的频谱混叠问题，提出修正的“CZT+IFFT”方法，同时运用时间尺度（Time-Scaling，TS）和尺度估计（Scale-Estimation，SE）概念，进一步提出2种梅林域的KT实现方法.仿真试验验证了分析结论的正确性和所提方法的有效性.

Abstract

Keystone transform(KT) is a classical target range migration correction method in radar. Among the existing implementation methods

the method based on the chirp-z transform(CZT) and inverse fast fourier transform(IFFT) has the lowest amount of calculation. Aiming at the spectrum aliasing problem in the above “CZT+IFFT” method

this paper proposes a modified “CZT+IFFT” method. At the same time

appling the concepts of time-scaling(TS) and scale-estimation(SE)

the other two KT implementation methods in mellin transform(MT) domain are further proposed. Simulation results verify the correctness of analysis conclusion and the effectiveness of proposed methods.

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Keywords

references

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