In this thesis, various kinds of theory to account for injection locking and pulling in the literature are studied and compared. On this basis, this thesis derives a generalized locking equation when injection signal is modulated signal. In applications, a novel RF sensing circuit for cognitive radio system is proposed using injection locking and frequency demodulation. Detailed circuit architecture and sensing principle are also described in the thesis. In implementation, a hybrid VCO and a CMOS VCO have been separately used with the other components to establish the RF sensing circuit. The simulation relies on a discrete-time numerical method. Comparison between measurement and simulation shows very good agreement. This RF sensing circuit can simultaneously sense frequency and power with a sensing speed up to 400 MHz/ms and a sensing sensitivity as low as -80 dBm, showing that the presented prototype can fast and reliably sense frequency and power for analog and digital modulation signals.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0726109-161606 |
| Date | 26 July 2009 |
| Creators | Wang, Fu-Kang |
| Contributors | Kang-Chun Peng, Huey-Ru Chuang, Chie-In Lee, Sheng-Fu Chang, Tzyy-Sheng Horng |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0726109-161606 |
| Rights | not_available, Copyright information available at source archive |
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