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Journal of Zhejiang University SCIENCE C 1998 Vol.-1 No.-1 P.

http://doi.org/10.1631/FITEE.2000418


Range estimation based on symmetry polynomial aided Chinese remainder theorem for multiple targets in pulse Doppler radar


Author(s):  Chenghu CAO, Yongbo ZHAO

Affiliation(s):  National Lab of Radar Signal Processing, Xidian University, Xi’ more

Corresponding email(s):   ybzhao@xidian.edu.cn

Key Words:  Range ambiguity, Erroneous range, Multiple targets, Symmetry polynomial aided Chinese remainder theorem


Chenghu CAO, Yongbo ZHAO. Range estimation based on symmetry polynomial aided Chinese remainder theorem for multiple targets in pulse Doppler radar[J]. Frontiers of Information Technology & Electronic Engineering, 1998, -1(-1): .

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Abstract: 
To avoid Doppler ambiguity, pulse Doppler (PD) radar may operate on a high pulse repetition frequency (PRF). The use of a high PRF can, however, lead to range ambiguity in many cases. At present, the major efficient solution to solve range ambiguity is based on a waveform design scheme. It adds complexity to a radar system. However, the traditional multiple PRF-based scheme is difficult to apply for multiple targets because of unknown correspondence between the target and measured range especially in using the Chinese remainder theorem (CRT) algorithm. We make a study of the CRT algorithm for multiple targets when the residue set contains noise error. This paper presents a symmetry polynomial aided CRT algorithm to effectively achieve range estimation of multiple targets when the measured ranges are overlapped with noisy error. A closed-form and robust CRT algorithm for single target and Aitken acceleration algorithm for finding roots of polynomial equation are used to improve the computational complexity of the proposed algorithm.

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