Design of Computationally Efficient Sharp FIR Filter Utilizing Modified Multistage FRM Technique for Wireless Communications Systems |
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Authors: | Tirthadip Sinha Jaydeb Bhaumik |
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Affiliation: | 1. Department of Electronics and Communication Engineering, Haldia Institute of Technology, Haldia 721657, India;2. Department of Electronics and Tele-Communication Engineering, Jadavpur University, Kolkata 700032, India |
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Abstract: | Modern wireless communications gadgets demand multi-standard communications facilities with least overlap between different input radio channels. A sharp digital filter of extremely narrow transition-width with lower stop band ripples offers alias-free switching among the preferred frequency bands. A computationally competent low pass filter (LPF) structure based on the multistage frequency response masking (FRM) approach is proposed for the design of sharp finite impulse response (FIR) filters which are suitable for wireless communications applications. In comparison of basic FRM with other existing multistage FRM structures, the proposed structure has a narrow transition bandwidth and higher stop band attenuation with significant reduction in terms of the number of computational steps. A design example is incorporated to demonstrate the efficiency of the proposed approach. Simulation results establish the improvement of the proposed scheme over other recently published design strategies. |
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Keywords: | Multistage frequency response masking narrow transition-width sharp finite impulse response filter wireless communications |
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