ABSTRACT
The narrow band FIR filter is based on multi-rate signal processing. Specifically, this theory is the study of multistage realization of extraction, interpolation, equivalent transformation and sampling rate conversion. The narrow band filter whose filtering characteristic largely determines performance of system is considered as the important part of quasi-continuous wave system. How to design that high sampling frequency system has both superior filter performance and small footprint is the urgent problem. This paper uses cascade integrator comb filter to design efficient narrowband filter, which can save hardware resources while ensuring the filter characteristics. Quasi-continuous wave system using cascade integrator comb filter is simulated. Moreover, compared with the technology of wideband matching, SNR loss in quasi-continuous-wave receiver is deduced and calculated in this paper1.
