微弱脉冲激光回波信号的峰度检测

The Detection of Weak Pulse Laser Echo Signal by the Kurtosis

针对微弱激光回波信号检测中存在的噪声复杂，信号产生畸变、展宽和幅度衰减等情况，对高阶累积量、相关检测、匹配滤波等方法进行研究。通过理论分析和仿真比较，并基于现场可编程门阵列（field programmable gate array，FPGA）完成了算法的硬件实现，验证了采用高阶累积量方法进行微弱激光回波信号检测的优良性能和可行性。

The high-order cumulant, correlation detection and matched filter are studied in laser echo detection because the weak laser echo is aberranced, expansile, attenuated and polluted by noise. On the basis of theoretic analysis and emulation, the algorithm for laser echo detection is implemented on field programmable gate array（FPGA）. It shows that the high-order cumulant has good performance and feasibility in weak laser echo detection.