Frontiers of Information Technology & Electronic Engineering
>> 2022,
Volume 23,
Issue 2
doi:
10.1631/FITEE.2000418
Range estimation based on symmetry polynomial aided Chinese remainder theorem for multiple targets in a pulse Doppler radar
Affiliation(s): National Lab of Radar Signal Processing, Xidian University, Xi'an 710071, China; Information Sensing and Understanding, Xidian University, Xi'an 710071, China; less
Received: 2020-08-17
Accepted: 2022-02-28
Available online: 2022-02-28
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Abstract
To avoid Doppler ambiguity, pulse Doppler radar may operate on a high pulse repetition frequency (PRF). The use of a high PRF can, however, lead to in many cases. At present, the major efficient solution to solve is based on a waveform design scheme. It adds complexity to a radar system. However, the traditional multiple-PRF-based scheme is difficult to be applied in because of unknown correspondence between the target range and measured range, especially using the Chinese remainder theorem (CRT) algorithm. We make a study of the CRT algorithm for when the residue set contains noise error. In this paper, we present a symmetry polynomial aided CRT algorithm to effectively achieve range estimation of when the measured ranges are overlapped with noise error. A closed-form and robust CRT algorithm for single target and the Aitken acceleration algorithm for finding roots of a polynomial equation are used to decrease the computational complexity of the proposed algorithm.
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