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|Title:||Twiddle Factor Generation Using Chebyshev Polynomials and HDL for Frequency Domain Beamforming||Authors:||Akkad, Ghattas
Hassan, Bachar El
Le Roy, Fredric
|Affiliations:||Department of Computer Engineering||Keywords:||FFT
|Issue Date:||2019||Part of:||Lecture Notes in Electrical Engineering||Volume:||573||Start page:||153||End page:||165||Conference:||International Conference on Applications in Electronics Pervading Industry, Environment and Society (26-27 Sep 2018 : Pisa, Italy)||Abstract:||
Twiddle factor generation is considered a computationally intensive task in generic length, high resolution, FFT operations. In order to accelerate twiddle factor generation, we propose a reconfigurable hardware architecture based on Chebyshev polynomial expansion for computing the cosine and sine trigonometric functions under finite precision arithmetic. We show that our approach presents a flexible 3 decimal digits precision output for variable length FFT operations, since the same design space can be used for any power of 2 FFT length. In particular, this study focuses on communication systems incorporating frequency domain beamforming algorithms for single and multi-beams. The proposed architecture is competitive with classical designs i.e. Coordinate Rotation Digital Computer, CORDIC and Taylor Series by providing low latency, high precision twiddle factors for variable length FFT.
|URI:||https://scholarhub.balamand.edu.lb/handle/uob/871||Ezproxy URL:||Link to full text||Type:||Conference Paper|
|Appears in Collections:||Department of Computer Engineering|
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