A new FFT architecture for 4 x 4 MIMO-OFDMA systems with variable symbol lengths

A. Karachalios, K. Nakos, D. Reisis, H. Alnuweiri

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

We present a new FFT architecture for multi-input multioutput (MIMO) OFDMA wireless systems that require processing variable symbol lengths, ranging from 128 to 2048 complex points. The organization is based on 16 concurrent butterfly processing elements with each element computing a 128-point FFT by implementing an in-place technique. A novel processor-memory interconnection scheme allows the processing elements to operate in sets of k, 1 ≤ k ≤ 16, for completing FFT computations of size 128 x k, up to 2048 points. The architecture scales to support 4 x 4 MIMO-OFDMA operation. An FPGA implementation shows that the proposed organization requires 9995 slices on Xilinx Virtex-4 compared to 21624 slices of four parallel FFT architectures accomplishing the same task.

Original languageEnglish
Title of host publication2009 International Conference on Innovations in Information Technology, IIT '09
Pages80-84
Number of pages5
DOIs
Publication statusPublished - 1 Dec 2009
Event2009 International Conference on Innovations in Information Technology, IIT '09 - Al-Ain, United Arab Emirates
Duration: 15 Dec 200917 Dec 2009

Publication series

Name2009 International Conference on Innovations in Information Technology, IIT '09

Other

Other2009 International Conference on Innovations in Information Technology, IIT '09
CountryUnited Arab Emirates
CityAl-Ain
Period15/12/0917/12/09

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ASJC Scopus subject areas

  • Information Systems

Cite this

Karachalios, A., Nakos, K., Reisis, D., & Alnuweiri, H. (2009). A new FFT architecture for 4 x 4 MIMO-OFDMA systems with variable symbol lengths. In 2009 International Conference on Innovations in Information Technology, IIT '09 (pp. 80-84). [5413367] (2009 International Conference on Innovations in Information Technology, IIT '09). https://doi.org/10.1109/IIT.2009.5413367