THE SAMPLING THEOREM FOR BANDPASS SIGNAL AND THE DESIGN OF ALL DIGITAL QUADRATURE DETECTORS
带通信号采样定理和全数字式正交检波器的设计

The sampling theorem for bandpass signal is the theoretical basis for design of all digital quadrature detectors. There are various expressions for this theorem in previous references, which has greatly affected the optimum design of all digital quadrature detectors. The correct expression is introduced in this paper, and the optimum design of all digital quadrature detectors is discussed.