A study on adaptive modulation of data spread OFDM

Author

Ishikawa, Hikaru ; Fujii, Masahiro ; Itami, Makoto ; Itoh, Kohji

Author_Institution

Dept. of Appl. Electron., Tokyo Univ. of Sci., Chiba, Japan

fYear

2005

fDate

6-8 April 2005

Firstpage

47

Lastpage

51

Abstract

An adaptive sub-carrier modulation in OFDM transmission is an effective scheme in order to increase transmission rate because it is possible for OFDM to determine a modulation scheme of each sub-carrier independently according to its channel state information. However, in this case, it is necessary to transmit allocation information of modulation from the transmitter to the receiver and this leads to degradation of performance. In this paper, an adaptive modulation scheme for OFDM that makes possible less information transmission from the transmitter to the receiver for allocation information is proposed. Moreover, sub-carrier power control is combined in order to improve performance further. As the result of theoretical analysis and simulation, better performance of the proposed scheme was confirmed.

Keywords

OFDM modulation; adaptive modulation; power control; receivers; telecommunication channels; telecommunication control; transmitters; OFDM transmission; adaptive subcarrier modulation; channel state information; sub-carrier power control; Analytical models; Channel state information; Data communication; Degradation; Frequency division multiplexing; Information analysis; OFDM modulation; Performance analysis; Power control; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Line Communications and Its Applications, 2005 International Symposium on

Print_ISBN

0-7803-8844-5

Type

conf

DOI

10.1109/ISPLC.2005.1430463

Filename

1430463