Digital Quadrature Demodulation of Wideband Radar Based on Nonuniform-sampling
Zengping Chen · Journal of National University of Defense Technology · 2010
Flexibility and simplicity are key points in designing a digital quadrature demodulator,which is an important part of wideband radar digital receiver.In this paper,we proposed a new implementation of digital quadrature demodulation based on nonuniform-sampling,which is evolved from second-order sampling and multiphase filter.The structure of nonuniform-sampling was presented,and its effectiveness was verified by simulation results.Compared with low-pass filter and multiphase filter,nonuniform-sampling obtains more optimized structure and better performance in real-time processing.This novel approach will offer potential for better resolution in designing a wideband radar digital receiver.