Abstract:
Realising a low-complexity Farrow channelisation algorithm for multi-standard receivers
in software-defined radio is a challenging task. A Farrow filter operates best at low frequencies
while its performance degrades towards the Nyquist region. This makes wideband channelisation
in software-defined radio a challenging task with high computational complexity. In this paper,
a hybrid Farrow algorithm that combines a modulated Farrow filter with a frequency response
interpolated coefficient decimated masking filter is proposed for the design of a novel filter with
low computational complexity. A design example shows that the HFarrow filter bank achieved
multiplier reduction of 50%, 70% and 64%, respectively, in comparison with non-uniform modulated
discrete Fourier transform (NU MDFT FB), coefficient decimated filter bank (CD FB) and interpolated
coefficient decimated (ICDM) filter algorithms. The HFarrow filter bank is able to provide the same
number of sub-band channels as other algorithms such as non-uniform modulated discrete Fourier
transform (NU MDFT FB), coefficient decimated filter bank (CD FB) and interpolated coefficient
decimated (ICDM) filter algorithms, but with less computational complexity.
