Title :
A weak signal pse-nonuniform sampling method and system to beyond the Nyquise limit
Author :
Cai, Xiangping ; Li, Dong
Author_Institution :
Inst. of Photo-Electr. Inf. Eng., Beijing Inf. Sci. & Technol. Univ., Beijing, China
Abstract :
The theory of nonuniformly sampling can process signals with components whose frequencies exceed the Nyquist limit. The disadvantage of nonuniformly sampling is hard to realize and process the weak signal. A method for pse-nonuniform sampling to process weak signal is proposed. It combines sampling rate with amplitude of signals. It make the most of some special samples that it is help to process signal so it is very effective to suppress noise. It can estimate exactly the frequency of weak signal when Signal-to-Noise Ratio (SNR) is below -15dB. The Pse-nonuniform system based on Digital Signal Processor and Field Programmable Gate Array is realized in this paper.
Keywords :
digital signal processing chips; field programmable gate arrays; noise; signal sampling; Nyquise limit; digital signal processor; field programmable gate array; noise suppression; signal processing; signal-to-noise ratio; weak signal Pse-nonuniform sampling method; Weak Signal; nonuniformly; sampling;
Conference_Titel :
Computer Science and Information Technology (ICCSIT), 2010 3rd IEEE International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-5537-9
DOI :
10.1109/ICCSIT.2010.5564734
