A computational technique and a VLSI architecture for digital pulse shaping in OFDM modems

Author

Fotopoulou, E. ; Paliouras, Vassilis ; Stouraitis, T.

Author_Institution

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

Volume

2

fYear

2003

fDate

25-28 May 2003

Abstract

This paper introduces an efficient computational technique for Orthogonal Frequency Division Multiplexing (OFDM) design with digital pulse shaping filters and discusses the corresponding VLSI architecture issues. In the proposed architecture a 64-point, radix-4 pipelined FFT is implemented in combination with a parallel digital pulse shaping filter architecture. By exploiting the redundancy in to the cyclic prefix part of the OFDM symbol, a significant 20% reduction of the required arithmetic operations is accomplished.

Keywords

OFDM modulation; VLSI; convolution; digital filters; digital signal processing chips; fast Fourier transforms; modems; parallel architectures; pipeline arithmetic; pulse shaping; OFDM modems; VLSI architecture; arithmetic operations reduction; computational technique; digital pulse shaping filters; orthogonal frequency division multiplexing; parallel filter architecture; radix-4 pipelined FFT; Arithmetic; Computer architecture; Digital filters; Filtering; Modems; OFDM modulation; Pulse shaping methods; Transmitters; Very large scale integration; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on

Print_ISBN

0-7803-7761-3

Type

conf

DOI

10.1109/ISCAS.2003.1205909

Filename

1205909