Please use this identifier to cite or link to this item:
http://hdl.handle.net/11375/14309
Title: | An Analysis of a Fast Carrier Recovery System for TDMA |
Authors: | Weaver, Francis Carl |
Advisor: | Taylor, D. P. |
Department: | Electrical Engineering |
Keywords: | Electrical and Electronics;Electrical and Electronics |
Publication Date: | Nov-1981 |
Abstract: | <p>Phase-locked loops occasionally exhibit prolonged phase transients and are therefore not suitable for carrier recovery applications in time division multiple access (TDMA) systems. Instead, designers have, in several cases, used a single-tuned high Q filter in combination with an automatic frequency control. A non-linear differential equation model for such a system, called a "frequency locked loop" (FLL) is solved by computer to obtain the transient responses. The solutions obtained indicate that the FLL has fast and reliable carrier phase acquisition time compared to a phase-locked loop (PLL). Also, since the non-linear responses agree well with linear model responses, an equation based on the linear model is developed to determine worst-case acquisition time. It is shown that a limiter preceeding the single-tuned tank does not directly affect acquisition performance and will improve noise performance of the FLL. With a limiter, the FLL block diagram is equivalent to an FM feedback demodulator (FMFB) on which there is a large amount of existing literature. Using results from the literature, it is demonstrated how the FMFB will perform in the presence of Gaussian noise. Finally, a design procedure is recommended which takes into account the tradeoff between noise performance and acquisition/tracking ability and attempts to minimize the acquisition time for a given level of Gaussian noise.</p> |
URI: | http://hdl.handle.net/11375/14309 |
Identifier: | opendissertations/95 1519 916858 |
Appears in Collections: | Open Access Dissertations and Theses |
Files in This Item:
File | Size | Format | |
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fulltext.pdf | 1.27 MB | Adobe PDF | View/Open |
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