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URN etd-0819109-172527 Statistics This thesis had been viewed 2959 times. Download 1551 times. Author Li-Shiang Ho 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 50 Title STUDY OF GENERALIZED QUADRATURE BANDPASS SAMPLING AND NOISE ALIASING ERROR Keyword noise aliasing GENERALIZED QUADRATURE BANDPASS SAMPLING GQBPS bandpass sampling bandpass sampling GQBPS GENERALIZED QUADRATURE BANDPASS SAMPLING noise aliasing Abstract The concept of Software Define Radio (SDR) is to remove the mixers, and to place the analog-to-digital converters (ADC) as close as possible to the antenna, then we can use program to implement more capabilities of communication system. Bandpass sampling is an undersampling technique, it realizes frequency down-conversion, and provides an interface between the IF stage and ADC. Bandpass sampling becomes more and more attractive for SDR.
Noise aliasing is a direct consequence by bandpass sampling, due to the thermal noise from circuit network, bandpass sampling with noise gives raise the noise power, such that the signal to noise ratio (SNR) is degraded. In this paper, using a generalized quadrature bandpass sampling with FIR filtering to eliminate the image band, and reduction the noise aliasing to give raise the SNR of the system performance.
Advisor Committee Jie-Cherng Liu - advisor
none - co-chair
none - co-chair
Files Date of Defense 2009-07-31 Date of Submission 2009-08-19