摘要
针对激光测振系统中散斑效应导致的语音脉冲噪声,该文研究了一种基于4阶累积量的峰度检测算法,推导了峰度系数和归一化峰度系数的数学迭代公式,并在FPGA的实现中提出了一种峰度系数的动态阈值的判决方法。基于实验数据的仿真结果表明,该算法较理论公式减少了约25%的计算量,节省了硬件资源,对较小幅度的脉冲噪声具有更敏感的检测性能。
For the speech impulse noise caused by the speckle effect in the laser vibration measurement system,a kurtosis detection algorithm based on the fourth-order cumulant is studied,and the mathematical iterative formulas for the kurtosis coefficient and the normalized kurtosis coefficient are deduced,and a method for determining the dynamic threshold of kurtosis coefficient is proposed in FPGA.The simulation results based on experimental data show that the algorithm reduces the calculation by about 25%compared with the theoretical formula and saves hardware resources,and has a more sensitive detection performance for lower amplitude impulse noise.
作者
周晓波
王洪
周郭飞
ZHOU Xiaobo;WANG Hong;ZHOU Guofei(School of Electronics and Information Engineering,Beijing Jiaotong University,Beijing 100044,China;The First Research Institute of the Ministry of Public Security,Beijing 100048,China)
出处
《电子与信息学报》
EI
CSCD
北大核心
2021年第7期1816-1820,共5页
Journal of Electronics & Information Technology
基金
国家自然科学基金(U1534201)。
关键词
激光测振
散斑效应
脉冲噪声
峰度检测
Laser vibration measurement
Speckle effect
Impulse noise
Kurtosis detection
