Unified FRM‐based complex modulated filter bank structure with low complexity.

Software defined radios typically employ digital filter banks (FBs) for channelisation. Frequency response masking (FRM) approach is used to reduce the computational complexity of the complex modulated FB with narrow transition band. A unified FRM‐based complex modulated FB structure is proposed to design sharp filters with arbitrary passband bandwidth. The proposed unified FRM‐based complex modulated FB structure with low complexity is suitable for different even‐stacked or odd‐stacked, maximally decimated or non‐maximally decimated structures. It also can be directly applied to high sampling rate systems. It is shown that the proposed unified FRM‐based complex modulated FB structure can obtain the improvement of the computational complexity compared with the other methods. [ABSTRACT FROM AUTHOR]