Receiver, signal demodulation module and demodulation method thereof

摘要

A signal demodulation module is disclosed. The signal demodulation module includes an injection-locked oscillator, an envelope detector and a data slicer. The injection-locked oscillator has a central oscillating frequency equal to a frequency of a digital modulation signal received, and outputs a phase-locked oscillating signal which is in phase to the digital modulation signal. When input phase of the digital modulation signal changes, output phase of the injection-locked oscillator changes synchronously. The envelope detector is used for detecting an envelope line of the phase-locked oscillating signal and outputting an envelope signal accordingly. The data slicer is used for receiving the envelop signal and outputting a first digital signal according to a reference voltage and the envelop signal.

主权项

1. A signal demodulation module, comprising:
an injection-locked oscillator, having a central oscillating frequency, receiving a digital modulation signal, and outputting a phase-locked oscillating signal which is in phase to the digital modulation signal, and when an input phase of the digital modulation signal changes, an output phase of the injection-locked oscillator changes synchronously, wherein the central oscillating frequency is equal to a frequency of a digital modulation signal; an envelope detector, connected to the injection-locked oscillator, and the envelope detector detecting an envelope line of the phase-locked oscillating signal and outputting an envelope signal which is analogic accordingly; and a data slicer, connected to the envelope detector, and the data slicer having a reference voltage and receiving the envelop signal, and the data slicer outputting a first digital signal according to the reference voltage and the envelop signal; wherein when the output phase of the injection-locked oscillator changes, an amplitude of the phase-locked oscillating signal will temporarily be relatively small compared to the amplitude of the phase-locked oscillating signal in a pre-state.