Title :
Closed-Form Design of CIC Compensators Based on Maximally Flat Error Criterion
Author :
Molnar, Goran ; Vucic, Mladen
Author_Institution :
Dept. of Electron. Syst. & Inf. Process., Univ. of Zagreb, Zagreb, Croatia
Abstract :
The simplest decimation filter is the cascaded-integrator-comb (CIC) filter. However, its magnitude response has a high passband droop, which is not tolerable in many applications. One technique for the reduction of the droop is the compensation by a filter called CIC compensator. This brief presents a method for the design of high-order finite-impulse-response CIC compensators which is based on maximally flat error criterion. The compensator´s coefficients are obtained by solving a linear system of equations, which is formed using a straightforward procedure. The compensators presented are suitable for application in narrow-band software radio receivers.
Keywords :
FIR filters; band-pass filters; cascade networks; comb filters; network synthesis; radio receivers; software radio; cascaded-integrator-comb filter; closed-form design; decimation filter; high passband droop; high-order finite impulse response CIC compensator design; magnitude response; maximally flat error criterion; narrow band software radio receiver; Approximation methods; Design methodology; Finite impulse response filter; MATLAB; Passband; Receivers; Bernoulli numbers; CIC compensators; cascaded-integrator-comb (CIC) filters; finite-impulse-response (FIR) filters; maximally flat approximation;
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
DOI :
10.1109/TCSII.2011.2172522
