New anti-aliasing CIC filter design and realization on FPGA
Yu Liu · Journal of Dalian Maritime University · 2007
The bias of passband and aliasing-imaging attenuation of the conventional Cascaded Integrator-Comb(CIC) filter,which is used as anti-aliasing filter for decimating and interpolating,always can't satisfy the requirement of software radio system.In this paper,an improved method with Sharpened CIC filter cascading Interpolated Second-Order Polynomials(ISOP) is proposed,it widens the passband and increases the stopband attenuation.Finally it is implemented on a FPGA chip by SOPC tool: dspbuilder.It simplifies the design flow,reduces the cost and development time.