Journal of Systems Engineering and Electronics ›› 2020, Vol. 31 ›› Issue (3): 520-526.doi: 10.23919/JSEE.2020.000031

• Defence Electronics Technology • Previous Articles     Next Articles

High precision phase-domain radial velocity estimation for wideband radar systems

Wei QI1,*(), Zijian CUI2(), Huisheng YAO1(), Zhenmiao DENG2()   

  1. 1 Beijing Institute of Tracking and Telecommunications Technology, Beijing 100094, China
    2 School of Information Science and Technology, Xiamen University, Xiamen 210016, China
  • Received:2019-07-17 Online:2020-06-30 Published:2020-06-30
  • Contact: Wei QI E-mail:robyche@163.com;1035119072@qq.com;yuanfang2926@sina.com;dzm_ddb@xmu.edu.cn
  • About author:QI Wei was born in 1982. He received his Ph.D. degree in engineering mechanics from Beihang University in 2011. He is currently a senior engineer in Beijing Institute of Tracking and Telecommunication Technology, Beijing, China. His research interests include space engineering, radar signal processing, target tracking recognition and satellite navigation. E-mail: robyche@163.com|CUI Zijian was born in 1994. He is currently a master degree candidate of the College of Information Science and Technology, Xiamen University. His current research interests include radial velocity estimation and range measurement. E-mail: 1035119072@qq.com|YAO Huisheng was born in 1977. He received his B.S. degree in physical chemistry from Beijing Institute of Technology in 2004, and Ph.D. degree in engineering mechanics from Beijing Institute of Technology in 2007. He is currently a research assistant in Beijing Institution of Tracking and Telecommunication Technology, Beijing, China. His research interests include space engineering and space application. E-mail: yuanfang2926@sina.com|DENG Zhenmiao was born in 1977. He received his Ph.D. degree in signal and information processing from Nanjing University of Aeronautic and Astronautics, Nanjing, China, in 2007. He is a professor of the College of Information Science and Technology, Xiamen University. His current research interests include signal detection, parameter estimation, array signal processing and multirate signal processing. E-mail: dzm_ddb@xmu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(61471012);This work was supported by the National Natural Science Foundation of China (61471012)

Abstract:

Radial velocity estimation used in wide-band radar systems is investigated. By analyzing the signal of cross-correlation output of adjacent echoes, it is found that the frequency and phase of the cross-correlation output are related to the target's radial velocity. Since the precision of the phase estimation is higher than that of the frequency, a phase-based velocity estimator is proposed. However, the ambiguity problem exists in the phase estimators, and thus the estimation of the cross-correlation of adjacent echoes (CCAE) is used to calculate the ambiguity number. The root-mean-square-error (RMSE) of the proposed estimator is derived. Simulation results show that the performance of the proposed method is better than that of the frequency-based estimator.

Key words: radial velocity estimation, ambiguity, wideband radar system