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URN etd-0819109-172339 Statistics This thesis had been viewed 3469 times. Download 1941 times. Author Jun-yu Zhuang Author's Email Address No Public. Department Communication Engineering Year 2008 Semester 2 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 62 Title REDUCTION OF NOISE ALIASING BY USING
GENERALIZED UNIFORM BANDPASS SAMPLING
Keyword noise aliasing generalized uniform bandpass sampling generalized uniform bandpass sampling noise aliasing Abstract The kernel concept of the software defined radio (SDR) is to annul the mixers and to place analog-to-digital converters as near the antenna as possible. The reason why is that we can implement the most SDR functionality to a programmable micro or signal processor. Bandpass sampling is a helpful method for direct digital downconversion without mixers. The thermal noise introduced by sampling circuit, is caused aliasing in sampling process. Thereby the noise increased and the signal-to-noise ratio of bandpass sampling system degenerated. In this thesis, to eliminate noise aliasing, generalized quadrature bandpass sampling with FIR filtering extend to generalized uniform bandpass sampling with FIR filtering. And the signal-to-noise ratio of bandpass sampling system improved. Advisor Committee Jie-cherng Liu - advisor
none - co-chair
none - co-chair
Files Date of Defense 2009-07-27 Date of Submission 2009-08-19