正弦信号干扰下带通信号的采样

Sampling Theorem for Bandpass Signal Disturbed from a Sine Signal

提出了正弦信号干扰下的带通信号的抽样方法 ,它可以有效地克服正弦干扰信号对带通信号采样的影响 ;研究了正弦干扰信号的频率 f0 小于带通信号的下限频率 f L 和正弦干扰信号的频率 f0 大于带通信号的上限频率 f H 时 ,在采样信号的有效频段内不出现干扰信号的采样频率选择方法 ;给出了一个应用实例。理论证明和实际计算都表明了该方法的有效性。

A sampling theorem for bandpass signal disturbed from a sine function is proposed. The sine noise can be reduced under some determining sampling rates. When the frequency f 0 of a sine disturbing signal is less than the lower limit of bandpass available signal frequency f L, or when the frequency f 0 is greater than the upper limit of bandpass available signal frequency f H, the sampling rates are studied to avoid aliasing in pass-band. An application shows that the theorem is available.