摘要
基于PGC解调算法的光纤水听器解调系统具有较高的性能,被广泛应用于潜艇监测等振动传感中。PGC算法中低通滤波器的性能对解调结果起重要作用。采用提高滤波器阶数的方法,可以提高滤波器的性能,但这种方法的缺点是增加了滤波器系数,降低运算速率。而应用内插和屏蔽滤波(FRM)技术,与传统滤波器相比不仅可得到性能高的窄过渡带低通滤波器,提高解调系统的运算速率,还节省了乘法器资源。
Fiber optic hydrophone demodulation system with superior performance based on PGC algorithm is widely used in submarine monitoring and other vibration sensor. The performance of the low pass filter is very importance for the demodulation results in the PGC algorithm. Adopting the method improved the filter order can improve the performance of the filter, but the shortcoming of the method is the length of the filter becomes long prohibitively, reducing the computational efficiency. The interpolation and frequency response masking （FRM） technique are exploited and applied to the design of a high performance filter with very narrow transition bandwidth. It shows that the resulting filter entails less computational complexity substantially and reduces multiplier resources consumption comparing to the conventional filter.
出处
《信息技术》
2016年第1期139-142,共4页
Information Technology
关键词
PGC
光纤水听器
内插
屏蔽滤波
PGC
fiber optic hydrophone
interpolation
frequency response masking
