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A Pipelined FFT Architecture for Real-Valued Signals

Garrido, Mario, 1981- (författare)
Department of Signal, Systems and Radiocommuncations, Universidad Politecnica de Madrid, Madrid, Spain
Parhi, Keshab. K., (författare)
University of Minnesota, USA
Grajal, Jesus, (författare)
Department of Signal, Systems and Radiocommuncations, Universidad Politecnica de Madrid, Madrid, Spain
Ingår i: IEEE Transactions on Circuits and Systems Part 1 : Regular Papers. - IEEE. - 1549-8328. ; 56:12, s. 2634-2643
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Abstract Ämnesord
  • This paper presents a new pipelined hardware archi-tecture for the computation of the real-valued fast Fourier trans-form (RFFT). The proposed architecture takes advantage of the re-duced number of operations of the RFFT with respect to the com-plex fast Fourier transform (CFFT), and requires less area whileachieving higher throughput and lower latency.The architecture is based on a novel algorithm for the computa-tion of the RFFT, which, contrary to previous approaches, presentsa regular geometry suitable for the implementation of hardwarestructures. Moreover, the algorithm can be used for both the deci-mation in time (DIT) and decimation in frequency (DIF) decompo-sitions of the RFFT and requires the lowest number of operationsreported for radix 2.Finally, as in previous works, when calculating the RFFT theoutput samples are obtained in a scrambled order. The problemof reordering these samples is solved in this paper and a pipelinedcircuit that performs this reordering is proposed.


TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik -- Annan elektroteknik och elektronik (hsv//swe)
ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering -- Other Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)


Decimation in frequency
decimation in time
fast Fourier transform (FFT)
memory reduction
pipelined archi- tecture
real-valued signals
reordering circuit.
TECHNOLOGY Electrical engineering, electronics and photonics Electrical engineering
TEKNIKVETENSKAP Elektroteknik, elektronik och fotonik Elektroteknik

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