基于高阶累积量的突发信号检测技术

Burst Signal Detection Based on High Order Cumulants

突发信号检测是非合作通信中的一项重要工作,是后续处理的前提。针对由高阶累积量作为判决统计量的信号检测方法,分析了高阶累积量法在实际信号检测中存在的问题,提出了相应的改进算法,该算法只用2个符号进行累积量估计,通过在高阶累积量的基础上增加滑动窗,对累积量值进行平滑处理,并通过窗内累积量值的变化自适应调整窗长,减小或消除了因数据过短引起高阶累积量估计值的抖动。仿真结果表明该算法可以提高信号检测性能。

Burst Signal detection is important for noncooperation communications and is a precondition to the processing followed. Aiming at the detection method using high-order cumulants as detection-decision statistics, this paper analyses the problem of high order cumulant method in the real signal detection and provides an improved algorithm. We add a slip window to smooth the high order cumulants and adjust the window length adaptively according to the change of the cumulants. It can reduce the jitter of high order cumulants. The simulation results prove this algorithm can improve the signal detection performance.