Design of variable bandedge FIR filters with extremely large bandedge variation range

The computational complexities of digital variable bandedge finite impulse response (FIR) filters heavily depend on the frequency response approximation precision and bandedge variation range, for given transition width and ripple requirements. In this paper, a non- uniform filter bank approach is proposed for the design of variable bandedge FIR filters with extremely large variation range, but low computational complexity, while the frequency response of the variable filters are precisely approximated, especially for the filter with sharp transition band.