摘要
对于正弦特征信号,在工程技术领域有着广泛的应用.随着数字信号处理的普遍应用,信号的抽样是首先要面对的问题.根据抽样定理,取样信号应当能够重建原限带信号,但正弦信号在不同情况下,不一定能够重建.因为正弦信号的频谱是δ函数,只有两条谱线,也不是窄带信号,这样就造成了抽样的特殊性.对在抽样过程中出现的问题以及抽样的条件,进行了较为详尽的阐述.
It is widely used in the fields of engineering and technology for the sine signal which is a characteristic signal. With the popular application of DSPs, it is becoming the first problem for the sampling to the sine signal. According to sampling theorem, generally, the original band - limited signal is certainly obtained from sampling signal, but sine signal is not so. for it has only two spectrum lines in frequency domain, this leads to the abnormal result. This paper expounds the problem and conditions in the processing of sampling at large.
出处
《山东师范大学学报（自然科学版）》
CAS
2008年第3期71-73,共3页
Journal of Shandong Normal University(Natural Science)
基金
山东省自然科学基金资助项目(2007GG2007002)
关键词
抽样
特征信号
频谱
sampling
characteristic signal
apectmm
