接收機、訊號解調模組及其訊號解調方法RECEIVER, SIGNAL DEMODULATION MODULE AND DEMODULATION METHOD THEREOF

專利類型

發明

專利國別 (專利申請國家)

美國

專利申請案號

13/794,699

專利證號

US 8,811,541 B2

專利獲證名稱

接收機、訊號解調模組及其訊號解調方法RECEIVER, SIGNAL DEMODULATION MODULE AND DEMODULATION METHOD THEREOF

專利所屬機關 (申請機關)

國立臺灣大學

獲證日期

2014/08/19

技術說明

本發明實施例提供一種訊號解調模組，訊號解調模組包括注入式鎖定振盪器、包封檢測器與資料限幅器。注入式鎖定振盪器具有等於數位調變訊號之頻率之一中心振盪頻率，注入式鎖定振盪器接收數位調變訊號且輸出與數位調變訊號同相之鎖相振盪訊號，當數位調變訊號之輸入相位改變時，鎖相振盪訊號之輸出相位會同步改變。包封檢測器用以檢測鎖相振盪信號之包絡線並且據此輸出包絡訊號。資料限幅器根據基準電壓與所接收之包絡訊號以輸出第一數位訊號。 A signal demodulation module is disclosed. The signal demodulation module includes an injected locked oscillator, an envelope detector and a data slicer. The injected 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 injected 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.

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