An Efficient FFT Architecture for OFDM Communication Systems

Author

Harikrishna, K. ; Rao, T. Rama

Author_Institution

Dept. of Electron. & Comput. Eng., Narayana Eng. Coll., Nellore, India

fYear

2009

fDate

27-28 Oct. 2009

Firstpage

183

Lastpage

185

Abstract

This paper presents a high level implementation of a high performance FFT for modulator and demodulator in OFDM. The design has been coded in VHDL and targeted into Xilinx Virtex-E XCV3200E FPGAs. The hardware requirement comparison shows that our implementation outperforms other implementations of FFT on the same series of FPGAs. Radix-22 algorithm has the same multiplicative complexity as the radix-4 algorithm, but retains the butterfly structure of radix-2 algorithm.

Keywords

OFDM modulation; demodulators; digital arithmetic; fast Fourier transforms; field programmable gate arrays; hardware description languages; modulators; FFT architecture; OFDM communication systems; VHDL; Xilinx Virtex-E XCV3200E FPGA; demodulator; high level implementation; multiplicative complexity; radix-2 algorithm; radix-22 algorithm; radix-4 algorithm; CMOS technology; Capacitance; Diodes; Electrostatic discharge; Isolation technology; Low voltage; MOS devices; OFDM; Protection; Robustness; Fast Fourier Transform (FFT); Orthogonal Frequency Division Multiplexing (OFDM); Radix-22 Algorithm; VHDL;

fLanguage

English

Publisher

ieee

Conference_Titel

Advances in Recent Technologies in Communication and Computing, 2009. ARTCom '09. International Conference on

Conference_Location

Kottayam, Kerala

Print_ISBN

978-1-4244-5104-3

Electronic_ISBN

978-0-7695-3845-7

Type

conf

DOI

10.1109/ARTCom.2009.78

Filename

5327841