Polyphase based digital downconvertion of random if signals
任意中频带通信号多相数字下变频方法

Polyphase based digital downconvertion is widely used in software electronic system design because it is easy to be realized and also has anti-jamming ability. But this method has blind frequency zone. This paper proposes a new method based on polyphase digital downconvertion which can eliminate the blind frequency zone and realize the receiving of any IF bandpass signal without changing the structure.