Generalized Bandpass Sampling with Complex FIR Filtering

In this paper, generalized quadrature bandpass sampling (GQBPS) with complex FIR filtering is studied with respect to both noise and jitter. GQBPS is a type of nonuniform sampling, and has been extended to generalized uniform bandpass sampling (GUBPS). It is shown that GQBPS and GUBPS with complex FIR filtering perform both down-conversion and noise aliasing suppression in addition to sampling. Due to the averaging operation of FIR filtering, sampling jitter is also reduced to a certain degree by GQBPS and GUBPS. However, the performance by GQBPS is limited by the maximum effective sampling rate determined by the fixed time resolution of the sampling scheme. In contrast GUBPS avoids this problem