Design of optimal digital filter and digital signal processing for a CdZnTe high resolution gamma-ray system

摘要

We have developed an online digital signal processing system based on an FPGA. The system consists of pile-up rejection, baseline restorer, peak detection and pole-zero cancellation for evaluation of deposited energy in the detector. The shaping algorithm employed is a Moving Window Deconvolution (MWD) to shape digitized data into a trapezoidal form. For the purpose of verification, the developed digital system was tested for Cs-137 gamma rays. The entire system is programmed using the LabVIEW environment.