Title: A VLSI architecture of CORDIC-based popular windows and its FPGA prototype

Authors: Vikas Kumar; Kailash C. Ray; Preetam Kumar

Addresses: Electrical Engineering Department, Indian Institute of Technology, Patna, 800001, India ' Electrical Engineering Department, Indian Institute of Technology, Patna, 800001, India ' Electrical Engineering Department, Indian Institute of Technology, Patna, 800001, India

Abstract: Popular window technique such as Hamming, Hanning, Blackman, Blackman-Harris and flat top windows are an obvious choice before fast-Fourier-transform (FFT) in the domain of signal processing, communication system and image processing to minimise the undesirable phenomenon, i.e., spectral leakage and picket fence effect arise due to direct truncation by rectangular window. As the window characteristics depends upon the type of the function and length of window used, hence, this is necessary to choose a particular window function and window length depending upon the applications. In other hand, real-time implementation of window function demands efficient and flexible very-large-scale-integration (VLSI) architecture. Hence, this paper presents a new hardware efficient coordinate-rotation-digital-computer (CORDIC)-based VLSI architecture which is capable of reconfigurability to choose a window function among aforesaid popular window functions and window length ranging from 8 to 32 K (2¹⁵), depending upon the application. Further, this proposed architecture is prototyped on FPGA for real-time validation and implementation results have been highlighted along with error analysis.

Keywords: coordinate-rotation-digital-computer; CORDIC; flat top window; Blackman-Harris window; Blackman window; Hamming window; Hanning window; fast-Fourier-transform; FFT; FPGA; signal processing.

DOI: 10.1504/IJHPSA.2017.087156

International Journal of High Performance Systems Architecture, 2017 Vol.7 No.2, pp.57 - 69

Received: 24 Aug 2016
Accepted: 28 Mar 2017
Published online: 06 Oct 2017 *

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