OFDM with guard interval versus OFDM/offsetQAM for high data rate UMTS downlink transmission

Author

Lacroix, D. ; Goudard, N. ; Alard, M.

Author_Institution

DMR/DDH Lab., France Telecom R&D, Cesson-Sevigne, France

Volume

4

fYear

2001

fDate

6/23/1905 12:00:00 AM

Firstpage

2682

Abstract

OFDM modulation using a guard interval, denoted OFDM/QAM, in this paper, is well known for its robustness to multipath time varying propagation channels, and therefore used in several broadcasting and high data rate radio LAN standards. OFDM/OQAM modulation is an alternative to it, which has the advantage not to require the use of a guard interval, which leads to a gain in spectral efficiency. In this paper, we recall the main characteristics of OFDM/OQAM, and compare it to the OFDM/QAM in a realistic 3G context. We propose optimized modulation parameters and provide simulation results. The study confirms the interest of considering OFDM modulation for high data rate UMTS downlink transmission. Besides, in that context, the gain in spectral efficiency allows OFDM/OQAM to outperform OFDM/QAM performances

Keywords

OFDM modulation; cellular radio; multipath channels; optimisation; quadrature amplitude modulation; time-varying channels; 3G; OFDM modulation; OFDM/OQAM; OFDM/QAM; OFDM/offsetQAM; cellular radio; guard interval; high data rate UMTS downlink transmission; multipath time varying propagation channels; optimized modulation parameters; spectral efficiency; 3G mobile communication; Downlink; Fourier transforms; Laboratories; OFDM modulation; Prototypes; Quadrature amplitude modulation; Research and development; Robustness; Telecommunications;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2001. VTC 2001 Fall. IEEE VTS 54th

Conference_Location

Atlantic City, NJ

ISSN

1090-3038

Print_ISBN

0-7803-7005-8

Type

conf

DOI

10.1109/VTC.2001.957247

Filename

957247