基于幅度辅助的中国余数定理多目标多普勒频率估计算法

doi:10.3969/j.issn.1001-506X.2020.06.08

Abstract

Abstract:

The Doppler frequency of one target can be estimated with low computation cost and high precision via closed-form robust Chinese remainder theorem (CFRCRT) when pulsed Doppler (PD) radar works with a low pulse repetition frequency. However, it brings difficulty for the method based on Chinese remainder theorem to estimate Doppler frequencies of multiple targets, because the correspondence between the detected targets and the wrapped frequencies is unknown in advance. The proposed algorithm, which is based on amplitude aid using clustering methodology, solves the problem of Doppler frequencies estimation of multiple targets. Additionally, because traditional discrete Fourier transform suffers from low matching precision due to spectrum leakage and picket fence effect, all phase discrete Fourier transform (apDFT) is proposed to match the frequency remainder with high performance. The theoretical analysis and simulation results validate the effectiveness of the proposed method for Doppler frequencies of multiple targets in PD radar.

Key words: closed-form robust Chinese remainder theorem (CFRCRT), multiple targets Doppler frequency, amplitude aid, remainder grouping matching (RGM), all phase discrete Fourier transform (apDFT)

CLC Number:

TN953

Chenghu CAO, Yongbo ZHAO, Xiaojiao PANG, Sheng CHEN, Yili HU. Doppler frequencies estimation algorithm of multiple targets based on Chinese remainder theorem with amplitude aid[J]. Systems Engineering and Electronics, 2020, 42(6): 1261-1266.

Figures/Tables 7

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Table 1

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References 21

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目标	参数
目标	多普勒频率/kHz	幅度/V	相位/rad
1	124	3.0	0
2	310	5.0	0

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Doppler frequencies estimation algorithm of multiple targets based on Chinese remainder theorem with amplitude aid

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