A multiple access scheme for LMDS based on OFDM, O-CDMA and sectored antenna

Author

Li, Junsong ; Kavehrad, Mohsen

Author_Institution

Dept. of Electr. Eng., Pennsylvania State Univ., University Park, PA, USA

Volume

1

fYear

1999

fDate

1999

Firstpage

162

Abstract

In this paper, we propose a multi-access scheme based on OFDM/orthogonal-CDMA/sectored antenna for the last mile LMDS applications. Power control is adopted on both the uplink and downlink. Compared to TDMA/FDMA systems, the proposed configuration has a higher capacity and it offers a simpler multi-access scheme. It is more robust against multipath effects and makes it possible to increase the service coverage. Since only a single carrier frequency is used at 28 GHz, the hardware cost is lower than that for TDMA/FDMA systems

Keywords

OFDM modulation; code division multiple access; microwave antennas; power control; radio access networks; telecommunication control; 28 GHz; LMDS; O-CDMA; OFDM; capacity; downlink; hardware cost; multipath effects; multiple access scheme; orthogonal-CDMA; power control; sectored antenna; service coverage; uplink; Bandwidth; Costs; Directive antennas; Downlink; Fading; Frequency division multiaccess; Multiaccess communication; OFDM; Polarization; Spread spectrum communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 1999. ICC '99. 1999 IEEE International Conference on

Conference_Location

Vancouver, BC

Print_ISBN

0-7803-5284-X

Type

conf

DOI

10.1109/ICC.1999.767915

Filename

767915