信号处理系统的AD有效位数  

Efficient Number of Bit in Signal Processing System

作　　者：杜向辉[1] 李军侠[2] 陈小兵[1] 

机构地区：[1]海军驻洛阳地区航空军事代表室,河南洛阳471009 [2]中国空空导弹研究院,河南洛阳471009

出　　处：《河南机电高等专科学校学报》2010年第1期12-14,共3页Journal of Henan Mechanical and Electrical Engineering College

摘　　要：数字信号处理采用FPGA或DSP处理器来完成,而实际物理信号都以模拟形式存在。两者之间通过AD转换或DA转换联系起来,AD转换器是数字信号处理的重要器件。AD器件的性能决定了处理的数字信号的质量。有效位数是ADC的重要参数指标,如何测量系统的AD有效位数评估信号处理系统是我们面临的实际问题。参考测量AD有效位数的相关方法和公式,提出了实用测量方式。根据信号或通讯系统本身的特点,测量AD有效位数能有效地衡量系统动态范围。Digital signal processing is commonly implemented with FPGA or DSP processors;however physical signal which practically exists is presented with simulation form.Above two parts are connected with AD converter or DA converter,AD converter is an essential unit in DSP.The quality of AD converter determines the quality of digital signal.Efficient number of bit（ENOB） is an important index parameter,how to evaluate ENOB of signal processing system should be considered in our practical problem.Referring to the algorithms and formula of ENOB,the usable measure method is proposed.Meanwhile due to the character of signal processing or communication system,ENOB of AD converter can do measure dynamic range of the corresponding system.

关 键 词：AD转换器 信噪比 FFT 有效位数 动态范围 

分 类 号：TN911.7[电子电信—通信与信息系统]