The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Architectures for Dynamic Data Scaling in 2/4/8K Pipeline FFT Cores

Author

Summary, in English

This paper presents architectures for supporting dynamic

data scaling in pipeline fast Fourier transforms (FFTs), suitable when implementing large size FFTs in applications such as digital video broadcasting and digital holographic imaging. In a pipeline FFT, data is continuously streaming and must, hence, be scaled without stalling the dataflow. We propose a hybrid floating-point scheme with tailored exponent datapath, and a co-optimized architecture between hybrid floating point and block floating point (BFP) to reduce memory requirements for 2-D signal processing. The presented co-optimization generates a higher signal-to-quantization-noise ratio and requires less memory than for

instance convergent BFP. A 2048-point pipeline FFT has been fabricated in a standard-CMOS process from AMI Semiconductor (Lenart and Öwall, 2003), and a field-programmable gate array prototype integrating a 2-D FFT core in a larger design shows that the architecture is suitable for image reconstruction in digital holographic imaging.

Publishing year

2006

Language

English

Pages

1286-1290

Publication/Series

IEEE Transactions on Very Large Scale Integration (VLSI) Systems

Volume

14

Issue

11

Document type

Journal article

Publisher

IEEE - Institute of Electrical and Electronics Engineers Inc.

Topic

  • Electrical Engineering, Electronic Engineering, Information Engineering

Keywords

  • multiplexing (OFDM)
  • orthogonal frequency-division
  • transform (FFT)
  • hybrid floating point
  • fast Fourier
  • dynamic data scaling
  • digital video broadcasting (DVB)
  • digital holography
  • block floating point (BFP)
  • convergent BFP (CBFP)

Status

Published

ISBN/ISSN/Other

  • ISSN: 1063-8210