Flexible Low Complexity Uniform and Nonuniform Digital Filter Banks With High Frequency Resolution for Multistandard Radios


Multistandard radios sometimes use digital filter banks (FBs) for channelization of wideband input signals consisting of multiple radio channels akin to different wireless communication standards. In this paper, we tend to propose a new style technique to obtain uniform furthermore nonuniform digital FBs for multistandard channelization. In the proposed FB design technique, the improved coefficient decimation technique (ICDM) is used to obtain completely different low-pass, high-pass, and multiband frequency responses employing a single low-pass prototype filter. These frequency responses are algebraically operated upon using acceptable spectral subtraction, complementary filter response operation, and frequency response masking operations to obtain the specified sub-bands in the FB. With the assistance of appropriate design examples, we show that our FB may be a low complexity and flexible various to the other digital FBs within the literature, in each uniform and nonuniform channelization eventualities. The proposed ICDM-primarily based FB is shown to be able to attain a better range of distinctly located sub-bands with twice the center frequency resolution when put next with the discrete Fourier rework-primarily based FB (DFTFB) and the traditional coefficient decimation method-primarily based FB (CDFB). For a homogenous channelization design example for wireless communications, implementation results show that the proposed ICDM-based FB achieves seventy.ninety two% and fifteen.49% reductions in resource utilizations and fifty eight.72% and twenty three.13% reductions in power consumptions when put next with the DFTFB and CDFB respectively. Conjointly, for a nonuniform channelization design example for wireless communications, the proposed ICDM-primarily based FB shows an eleven.forty six% reduction in multiplication complexity compared with the CDFB.

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