一种直流干扰下带通信号的检测方法  

A Method of Detecting Band-pass Signal Under Disturbances from a Direct Current

作　　者：白文乐[1] 

机构地区：[1]北方工业大学机电工程学院,北京石景山100041

出　　处：《北方工业大学学报》2003年第3期50-53,共4页Journal of North China University of Technology

摘　　要：本文基于直流干扰下的带通信号 ,运用带通采样定理进行采样 ,以低于两倍带通信号最高频率进行采样检测 ,使带通信号有效频段内不出现直流干扰 ,避免了混叠 .重点对采样频率的选择进行了研究 。The paper depicts a sampling process based on band pass sampling theorem and using band pass signal under disturbances from a direct current. Sampling is detected with less than twice the highest frequency of band pass signal in order that no disturbances from a direct current appear in the range of effective frequencies, and that aliasing is avoided. The paper also focuses on the choice of sampling frequency and gives out simulation results from different sampling frequencies.

关 键 词：直流干扰 带通 信号检测 奈奎斯特采样 采样率 频谱 仿真 

分 类 号：TN911.6[电子电信—通信与信息系统]