像增强器信噪比测试仪中数字滤波器的设计  

Finite Impulse Response Digital Filters in the Signal/Noise Testsets of Image Intensifiers

作　　者：童默颖[1] 钱芸生[1] 常本康[1] 詹启海[1] 

机构地区：[1]南京理工大学电光学院,江苏南京210094

出　　处：《红外技术》2002年第4期12-15,共4页Infrared Technology

摘　　要：在像增强器的信噪比 (SNR ,Signal NoiseRatio )测试中 ,需要获得 10Hz以下的信号 ,采用常规硬件电路实现的滤波器存在结构复杂、效果不理想的缺点。根据像增强器的信噪比测试特点 ,设计了有限长单位脉冲响应数字滤波器 (FIRDF ,FiniteImpulseResponseDigitalFilter) ,应用到像管信噪比测试仪中 ,实现信噪比的测试。Testing Signal Noise Ratio(SNR) of image intensifiers, the signals under 10 Hz need to be derived. There are several shortcomings of utilizing the hardware electrocircuit to realize the function such as configuration complexity and imperfect effect. According to the characteristic of testing signals, we design a finite impulse response digital filter(FIR DF) to actualize digital singal processing on the signals collected by the A/D card, derive perfect effect and carry out the testing of SNR.

关 键 词：像增强器 信噪比 测试仪 数字滤波器 切比雪夫逼近 

分 类 号：TN144[电子电信—物理电子学]