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J. Low Power Electron. Appl. 2013, 3(2), 99-113; doi:10.3390/jlpea3020099

Low-Power and Optimized VLSI Implementation of Compact Recursive Discrete Fourier Transform (RDFT) Processor for the Computations of DFT and Inverse Modified Cosine Transform (IMDCT) in a Digital Radio Mondiale (DRM) and DRM+ Receiver

Department of Electrical Engineering, National Cheng Kung University, 701 Tainan, Taiwan
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Received: 5 March 2013 / Revised: 1 May 2013 / Accepted: 10 May 2013 / Published: 24 May 2013
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Abstract

This paper presents a compact structure of recursive discrete Fourier transform (RDFT) with prime factor (PF) and common factor (CF) algorithms to calculate variable-length DFT coefficients. Low-power optimizations in VLSI implementation are applied to the proposed RDFT design. In the algorithm, for 256-point DFT computation, the results show that the proposed method greatly reduces the number of multiplications/additions/computational cycles by 97.40/94.31/46.50% compared to a recent approach. In chip realization, the core size and chip size are, respectively, 0.84 × 0.84 and 1.38 × 1.38 mm2. The power consumption for the 288- and 256-point DFT computations are, respectively, 10.2 (or 0.1051) and 11.5 (or 0.1176) mW at 25 (or 0.273) MHz simulated by NanoSim. It would be more efficient and more suitable than previous works for DRM and DRM+ applications.
Keywords: digital radio mondiale (DRM); discrete fourier transform (DFT); inverse modified cosine transform (IMDCT); recursive structure digital radio mondiale (DRM); discrete fourier transform (DFT); inverse modified cosine transform (IMDCT); recursive structure
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Lai, S.-C.; Lee, Y.-S.; Lei, S.-F. Low-Power and Optimized VLSI Implementation of Compact Recursive Discrete Fourier Transform (RDFT) Processor for the Computations of DFT and Inverse Modified Cosine Transform (IMDCT) in a Digital Radio Mondiale (DRM) and DRM+ Receiver. J. Low Power Electron. Appl. 2013, 3, 99-113.

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J. Low Power Electron. Appl. EISSN 2079-9268 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
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