Design of low power multiplierless FIR filter with enhanced adder efficiency using flower pollination optimization

• Published in: Applied acoustics 2021-03, Vol.174, p.107792, Article 107792
• Main Authors: Kumar, A., Sharma, I., Balyan, L.K.
• Format: Article
• Language: English
• Subjects: Common sub-expression elimination algorithms (CSE); Dynamic power; Finite impulse response (FIR) filter; Flower pollination algorithm (FPA); Hamming distance (HD); Optimization algorithms
• ISSN: 0003-682X
• DOI: 10.1016/j.apacoust.2020.107792

This paper presents an improved design of minimal power multiplierless finite impulse response (FIR) by using flower pollination algorithm (FPA) and newly proposed hybrid common sub-expression elimination (CSE) algorithm. The novel extract of this paper is three fold: first, enhancement of the power performance by reducing the switching activity; second, raising adder efficiency using newly proposed hybrid CSE algorithm; and third, optimizing the frequency response characteristics of filter by controlling ripples in passband and stopband region using FPA in one step. For this purpose, the minima of an objective function is achieved, constructed as sum of integral mean squared error with allowable tolerable limits to control ripples in passband and stopband region, and the dynamic power that has computed through hamming distance (HD) between two successive filter coefficients. In addition to this, the application of recently proposed CSE reduces the amount of adders, and lowers the value of HD. The significance of proposed algorithm is measured on the basis of different performance evaluation parameter such as; stopband attenuation (As), stopband ripple (δs), passband ripple (δp), hamming distance (HD), power and amount of adders respectively.