A frequency-domain interpolation implementation for OFDM transmitters

Author

Fotopoulou, Eleni ; Paliouras, Vassilis ; Stouraitis, Thanos

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Patras, Patras

fYear

2008

fDate

7-9 May 2008

Firstpage

628

Lastpage

632

Abstract

This paper introduces a frequency-domain interpolator by implementing a radix-8 512-point IFFT architecture for application on Orthogonal Frequency Division Multiplexing (OFDM) Wireless LAN transmitters. For the specific application where the interpolation factor is eight, the frequency-domain interpolator outperforms the time-domain interpolator implemented with digital low-pass FIR filters in terms of computational complexity. It is shown that the proposed implementation is more efficient regarding processing time when compared to previously reported implementations which utilize a smaller oversampling factor.

Keywords

FIR filters; OFDM modulation; computational complexity; fast Fourier transforms; frequency-domain analysis; interpolation; low-pass filters; radio transmitters; signal sampling; time-domain analysis; wireless LAN; OFDM wireless LAN transmitter; computational complexity; digital low-pass FIR filter; frequency-domain interpolation; orthogonal frequency division multiplexing; radix-8 512-point IFFT architecture; time-domain interpolator; Application software; Computational complexity; Computer architecture; Finite impulse response filter; Interpolation; Intersymbol interference; OFDM; Time domain analysis; Transmitters; Wireless LAN;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Pervasive Computing, 2008. ISWPC 2008. 3rd International Symposium on

Conference_Location

Santorini

Print_ISBN

978-1-4244-1652-3

Electronic_ISBN

978-1-4244-1653-0

Type

conf

DOI

10.1109/ISWPC.2008.4556285

Filename

4556285