Research on Error Estimation Algorithm of Distributed Radar with Open-loop Architecture

doi:10.3969/j.issn.1009-086x.2025.05.017

Abstract

Abstract:

Distributed radar， as a new type of radar， is characterized by strong maneuverability and high signal-to-noise ratio gain. Its radar architecture can be divided into open-loop architecture and closed-loop architecture. The former has become a hot research topic in recent years due to its higher applicability and potential. The difficulty in implementing distributed radar with open-loop architecture lies in the decoherence of unit radar signals caused by error factors such as time and phase synchronization errors and baseline calibration errors. Due to the sparsity of aperture in distributed radar， it is difficult to effectively correct errors in an open-loop architecture. In response to the above issues， this paper analyzed the error factors in open-loop architecture and established corresponding error models. To achieve more efficient estimation of errors， an error estimation method based on an article swarm algorithm was proposed. The correctness of the method was verified by simulation experiments， and the corresponding relationship between synthesis efficiency and calibrated signal-to-noise ratio was obtained. This study provides a reference for the engineering implementation of distributed radar with an open-loop architecture.

Key words: open-loop architecture, distributed radar, particle swarm algorithm, error estimation, combined efficieng

摘要：

分布式雷达作为新体制雷达，有着机动性强、信噪比增益高等特点，其雷达架构可分为开环架构和闭环架构2种，前者因为拥有更高的适用性和潜力，是近些年来研究的热点。开环架构分布式雷达实现的难点在于时间、相位同步误差和基线标定误差等误差因素导致单元雷达信号的退相参化。由于分布式雷达的孔径稀疏性，难以有效地对开环架构下的误差进行校正。针对上述问题，分析了开环架构下的误差因素，建立了相应的误差模型。为了更高效地实现对误差的估计，提出了一种基于粒子群算法的误差估计方法，最终通过仿真实验验证了方法的正确性，获得了合成效率与标校信噪比的对应关系，为分布式雷达开环架构的工程实现提供了参考。

关键词: 开环架构, 分布式雷达, 粒子群算法, 误差估计, 合成效率

CLC Number:

TJ76

Saibo YUAN, Yi ZHAO, Dan LIU, Chengzeng CHEN, Chuanming LI. Research on Error Estimation Algorithm of Distributed Radar with Open-loop Architecture[J]. Modern Defense Technology, 2025, 53(5): 161-168.

袁赛博, 赵毅, 刘丹, 陈成增, 李传铭. 开环架构分布式雷达误差估计算法研究[J]. 现代防御技术, 2025, 53(5): 161-168.

Figures/Tables 9

Fig. 1 Open loop architecture schematic diagram

Fig. 2 Schematic diagram of closed-loop architecture

Fig. 3 Schematic diagram of baseline calibration error model

Fig. 4 Schematic diagram of compensation algorithm process

Fig. 5 Relationship curve between baseline calibration error accuracy and signal-to-noise ratio

Fig. 6 Time synchronization error accuracy and calibration signal-to-noise ratio relationship curve

Fig. 7 Relationship curve between the proportion of synthesis efficiency meeting the threshold and the calibrated signal-to-noise ratio

Fig. 8 Relationship curve between synthesis efficiency and frequency modulation bandwidth

Fig. 9 Relationship curve between the proportion of synthesis efficiency meeting the threshold and the frequency modulation bandwidth

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