signal detection threshold

The basis of the theory model of laser radar for direct detection is built on that the maximal detectable distance is decided by certain detection probability, false-alarm rate, signal noise ratio and threshold noise ratio.

从虚警概率、探测概率、信噪比和阈值噪声比决定最大探测距离的这一角度阐述建立直接探测激光雷达模型；假设在直接检测方式下，探测器噪声可以用高斯概率密度函数表示；

Detection probability and false alarm probability are determined by the threshold of signal processing subsystem. Therefore, tracker performance, which is a function of detection probability and false alarm probability, depends on detection thresholds.

跟踪性能是检测概率和虚警概率的函数，而检测概率和虚警概率决定信号检测门限，因此，门限的选择直接影响跟踪系统性能。

Application of Improved Grubbs' Criterion to Estimation of Signal Detection Threshold

改进的格拉布斯准则在信号检测门限估值中的应用

Three methods for analyzing and processing the laser scattering signal of bubbles in water, the threshold detection, noise elimination processing and power spectral estimation, are put forward.

提出了阈值检测、降噪处理和功率谱估计三种分析和处理水中气泡激光散射信号的方法。

The results of analysis show that: the average probability of error for digital data communication in slow Rayleigh fading channel is less one half magnitude than the optimized threshold detection with fading signal at same mean SNR.

结果表明，在Rayleigh慢衰落信道上采用这种检测器，相对于工作此信道上的最佳固定门限检测器，在不同输入信噪比情况下，其平均误码率约有半个数量级的改善。