转发式干扰条件下LFM雷达的检测概率估计

doi:10.12305/j.issn.1001-506X.2024.02.14

Abstract

Abstract:

The difficulty in evaluating the effectiveness of multi-radar jamming lies in analyzing the impact of jammers on non target radars. In response to the problem of estimating the detection probability when a jammer unintentionally interferes with another linear frequency modulation (LFM) radar by forwarding a signal from one LFM radar, the reception gain of the jammed radar in the spatial, frequency, and time domains of the interference signal is calculated firstly. Secondly, the statistical characteristics of the interference signal in the decision unit are modeled as a non-central chi-square distribution, and the calculation methods for detection probability and false alarm probability are provided. The simulation results show that under the unintentional interference of a jammer, the estimated detection probability can serve as the upper limit of the detection probability of the jammed radar. To achieve the same jamming effect, transmitting signals from non target radars requires less jamming power than transmitting signals from target radars.

Key words: linear frequency modulation (LFM) radar, repeater jamming, unintentional interference, radar detection probability, non-coherent integration

CLC Number:

TN974

Yuanrong TIAN, Jundi WANG, Xiaotian WU. LFM radar detection probability estimation under repeater jamming[J]. Systems Engineering and Electronics, 2024, 46(2): 497-504.

Figures/Tables 10

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Table 1

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References 17

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参数	雷达1	雷达2
探测1 m²目标时发射机输出功率/W	7.92	-
接收机噪声系数/dB	0	-
脉冲宽度/μs	26	35
重频频率/Hz	44 281	34 145
调频带宽/MHz	30	20
波束宽度/(°)	7.35	-
天线增益/dB	20.1	-
非相参积累个数	8	-

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LFM radar detection probability estimation under repeater jamming

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