Adaptive coding and modulation in an OFDM-TDMA communication system

Author

Rohling, Hermann ; Grunheid, Rainer

Author_Institution

Inst. of Telecommun., Tech. Univ. Braunschweig, Germany

Volume

2

fYear

1998

fDate

18-21 May 1998

Firstpage

773

Abstract

The capacity of a wireless communication system based on the OFDM transmission technique is analysed. The considered system, which includes a TDMA approach, is designed for mobile access to different multimedia services, such as speech, video, e-mail and file transfer. In order to support a variety of services on the one hand and to take into account the behaviour of the frequency-selective radio channel on the other hand, an adaptive allocation of modulation and coding scheme is supplied. For this purpose, an optimal combination of modulation scheme and code rate is determined in a first step. Using these results, the capacity of such a system is analysed by calculating the number of supported users within a cell and comparing these numbers to a system with fixed modulation/coding

Keywords

OFDM modulation; Rayleigh channels; adaptive codes; adaptive modulation; cellular radio; channel capacity; multimedia communication; time division multiple access; OFDM-TDMA communication system; Rayleigh fading; adaptive allocation; adaptive coding; adaptive modulation; cellular radio; code rate; e-mail; file transfer; fixed modulation/coding; frequency-selective radio channel; mobile access; multimedia services; speech; video; wireless communication system capacity; Adaptive coding; Bandwidth; Downlink; Electronic mail; Modulation coding; OFDM modulation; Radio spectrum management; Speech analysis; Time division multiple access; Videoconference;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1998. VTC 98. 48th IEEE

Conference_Location

Ottawa, Ont.

ISSN

1090-3038

Print_ISBN

0-7803-4320-4

Type

conf

DOI

10.1109/VETEC.1998.683686

Filename

683686