基于对数似然比的湍流目标检测

摘要

On the basis of analyzing the turbulence target detection method,aimed at the situation that the detection proba-bility of traditional turbulence detection method is not high,simultaneously using the logarithmic likelihood ratio criterion, and assumeing that turbulence echo is a narrowband markov process,a new turbulence detection method is proposed in this paper.The different sample 、size false alarm rate and signal -to -noise ratio are set up respectively.The proposed turbu-lence detection method performance is simulated by using the Monte Carlo method simulation,and the comparison with tra-ditional method of the pulse pair is also given.The simulation results show that the detection probability of new detection al-gorithm is better than the traditional turbulence detection method in different indexes of sample、false alarm rate and signal to noise ratio.%在分析湍流目标检测方法的基础上，针对传统的湍流目标检测方法的检测概率不高，运用对数似然比准则，并假设湍流回波是一个窄带马尔科夫过程，提出了一种新的湍流检测方法。分别设置了不同样本量、虚警率和信噪比的情形，运用 Monte Carlo 方法仿真分析了提出的湍流检测方法性能，并与传统的脉冲对处理方法进行了比较。仿真结果表明，提出的湍流检测方法的检测概率分别在不同的样本量、虚警率和信噪比的性能指标下均大于传统的脉冲对检测方法的检测概率。