Performance of the COFDM systems with waveform shaping

Author

Benedetto, Valter ; D´aria, Giovanna ; Scarabosio, Luca ; Drakul, Spase L.

Author_Institution

CSELT, Torino, Italy

Volume

3

fYear

1997

fDate

8-12 Jun 1997

Firstpage

1241

Abstract

This paper explains the advantages of using a method for waveform shaping in COFDM. It is shown that such data shaping decreases the side lobes of the transmitted signal and minimizes the need for a guard band between OFDM systems. Classical OFDM systems based on DFT make use of a guard interval in order to improve the performance in multipath fading channels. A part of the loss due to the power transmitted during the guard interval can be compensated efficiently by the waveform shaping which is proposed. In the presence of both AWGN and multipath fading the bit error performance of the proposed system and the classical COFDM systems are compared. Digital video broadcasting is used as an example

Keywords

Gaussian channels; digital television; discrete Fourier transforms; error statistics; fading; frequency division multiplexing; interference suppression; multipath channels; radiofrequency interference; television broadcasting; television interference; AWGN; COFDM systems; DFT; bit error performance; data shaping; digital video broadcasting; guard band; guard interval; loss; multipath fading; multipath fading channels; performance; power transmitted; side lobes; transmitted signal; waveform shaping; Digital audio broadcasting; Digital video broadcasting; Discrete Fourier transforms; Fading; OFDM modulation; Pulse modulation; Pulse shaping methods; Quadrature amplitude modulation; Quadrature phase shift keying; Shape;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 1997. ICC '97 Montreal, Towards the Knowledge Millennium. 1997 IEEE International Conference on

Conference_Location

Montreal, Que.

Print_ISBN

0-7803-3925-8

Type

conf

DOI

10.1109/ICC.1997.594989

Filename

594989