Non-Uniform Sampling and Reconstruction of Multi-Band Signals and Its Application in Wideband Spectrum Sensing of Cognitive Radio

Date Added: Jul 2010
Format: PDF

Sampling theories lie at the heart of signal processing devices and communication systems. To accommodate high operating rates while retaining low computational cost, efficient Analog-to Digital (ADC) Converters must be developed. Many of limitations encountered in current converters are due to a traditional assumption that the sampling state needs to acquire the data at the Nyquist rate, corresponding to twice the signal bandwidth. In this paper a method of sampling far below the Nyquist rate for sparse spectrum multiband signals is investigated. The method is called periodic non-uniform sampling, and it is useful in a variety of applications such as data converters, sensor array imaging and image compression.