Initial Phase Coding With Two-Dimensional Local Low Sidelobes for Suppression of Active Forwarding Signals

IF 3.2 2区 工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE Signal Processing Letters Pub Date : 2024-09-24 DOI:10.1109/LSP.2024.3466996
Qianlan Huang;Sergey Heister;Hongqi Fan;Huaitie Xiao
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Abstract

The electromagnetic environment in modern battlefields is highly complex, particularly due to active forwarding signals based on digital radio frequency memory (DRFM), which significantly affects radar performance. Active forwarding signals generate jammers in the radar receiver.A jammer with a negative range offset needs to reach the radar with an inter-pulse delay. In addition, the target may also introduce range ambiguity in some cases. This paper establishes a general signal model for inter-pulse initial phase coding and proposes a two-dimensional local low sidelobe initial phase coding algorithm. This algorithm optimizes both the slow-time and Doppler dimensions to make local low sidelobes in both dimensional. The designed initial phase sequence ensures the Doppler resolution of the target while exhibiting locally low sidelobes in the Doppler responses of jammers.Simulation results demonstrate that this algorithm effectively enhances the radar's resistance to jammers and improves target detection performance. Furthermore, it operates independently of prior detection information and maintains low computational complexity.
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利用二维局部低边沿抑制主动转发信号的初始相位编码
现代战场的电磁环境非常复杂,尤其是基于数字射频存储器(DRFM)的有源转发信号会严重影响雷达性能。主动转发信号会在雷达接收器中产生干扰信号。具有负范围偏移的干扰信号需要经过脉冲间延迟才能到达雷达。此外,在某些情况下,目标还可能带来范围模糊。本文建立了脉冲间初始相位编码的一般信号模型,并提出了一种二维局部低侧叶初始相位编码算法。该算法同时优化了慢时维度和多普勒维度,从而在两个维度上都实现了局部低边瓣。仿真结果表明,该算法有效增强了雷达对干扰器的抗干扰能力,提高了目标探测性能。仿真结果表明,这种算法有效地增强了雷达对干扰器的抗干扰能力,提高了目标探测性能。此外,它的运行不受先前探测信息的影响,计算复杂度也很低。
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来源期刊
IEEE Signal Processing Letters
IEEE Signal Processing Letters 工程技术-工程:电子与电气
CiteScore
7.40
自引率
12.80%
发文量
339
审稿时长
2.8 months
期刊介绍: The IEEE Signal Processing Letters is a monthly, archival publication designed to provide rapid dissemination of original, cutting-edge ideas and timely, significant contributions in signal, image, speech, language and audio processing. Papers published in the Letters can be presented within one year of their appearance in signal processing conferences such as ICASSP, GlobalSIP and ICIP, and also in several workshop organized by the Signal Processing Society.
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