对多雷达干扰效果评估的难点在于分析干扰机对非 目标雷达的影响.针对干扰机转发一部线性调频(linear frequency modulation,LFM)雷达的信号无意干扰另一部LFM雷达时的检测概率估计问题,首先计算了被干扰雷达对干扰信号在空域、频域和时域上的接收增益;其次将干扰信号在判决单元中的统计特性建模为非中心卡方分布,并给出了检测概率和虚警概率的计算方法.仿真结果表明,在一部干扰机的无意干扰下,估计的检测概率可作为被干扰雷达检测概率的上限;为达到同样的干扰效果,转发非 目标雷达的信号实施干扰,比转发目标雷达的信号进行干扰所需的干扰功率更少.
LFM radar detection probability estimation under repeater jamming
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.
linear frequency modulation(LFM)radarrepeater jammingunintentional interferenceradar detection probabilitynon-coherent integration
万方数据
维普
