OFDM transmission diversity scheme for MMAC systems

Author

Sudo, Hiroaki ; Ishikawa, Kimihiko ; Ohta, Gen-ichiro

Author_Institution

Matsushita Commun. Ind. Co. Ltd., Yokosuka, Japan

Volume

1

fYear

2000

fDate

2000

Firstpage

410

Abstract

OFDM (orthogonal frequency division multiplexing) is used in the MMAC (multimedia mobile access communication) systems using 5 GHz band systems as an effective solution under a multipass fading environment. Transmission space diversity techniques for OFDM have been reported. In order to improve the performance better, it is proposed to control the gain of each sub-carrier at the transmitter side using transmission space diversity. Then the receiver gets a constant received level at each sub-carrier. Using this scheme, the receiver improves the performance better. Moreover, concerning peak power reduction, it is proposed to control the bound of the maximum gain according to number of sub-carriers in each branch

Keywords

OFDM modulation; diversity reception; error statistics; fading channels; land mobile radio; multimedia communication; power control; radio receivers; radio transmitters; telecommunication control; 5 GHz; MMAC systems; OFDM transmission diversity; SHF; down-link; error rate performance; gain control; multimedia mobile access communication; multipass fading; orthogonal frequency division multiplexing; peak power reduction; receiver; sub-carrier; transmission power control; transmission space diversity; transmitter; Communication system control; Degradation; Fading; Mobile communication; Multimedia communication; Multimedia systems; OFDM; Proposals; Transmitters; Transmitting antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference Proceedings, 2000. VTC 2000-Spring Tokyo. 2000 IEEE 51st

Conference_Location

Tokyo

ISSN

1090-3038

Print_ISBN

0-7803-5718-3

Type

conf

DOI

10.1109/VETECS.2000.851489

Filename

851489