Static quantised radix-2 fast Fourier transform (FFT)/inverse FFT processor for constraints analysis |
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Authors: | Rozita Teymourzadeh Memtode Jim Abigo Mok Vee Hoong |
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Affiliation: | 1. Architecture &2. Built Environment, UCSI University, Kuala Lumpur, Malaysiarozita_teymourzadeh@yahoo.com |
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Abstract: | This research work focuses on the design of a high-resolution fast Fourier transform (FFT)/inverse FFT (IFFT) processors for constraints analysis purpose. Amongst the major setbacks associated with such high-resolution FFT processors are the high-power consumption resulting from the structural complexity and computational inefficiency of floating-point calculations. As such, a parallel pipelined architecture was proposed to statically scale the resolution of the processor to suite adequate trade-off constraints. The quantisation was applied to provide an approximation to address the finite word-length constraints of digital signal processing. An optimum operating mode was proposed, based on the signal-to-quantisation-noise ratio (SQNR) as well as the statistical theory of quantisation, to minimise the trade-off issues associated with selecting the most application-efficient floating-point processing capability in contrast to their resolution quality. |
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Keywords: | DFT inverse DFT FFT IFFT quantised floating-point digital signal processing |
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