Adaptive Bit And Power-Loading For Multicast OFDM Transmissions In Rayleigh Fading Channels

Author

Demarez, Adrien ; Boulinguez, David ; Delignon, Yves

Author_Institution

ISEN Lille, Lille

fYear

2006

fDate

6-8 Sept. 2006

Firstpage

378

Lastpage

382

Abstract

Adaptive modulation techniques (bit/power- loading) allow great optimisation of spectral efficiency, power consumption and error rates in wireless multicarrier systems. However, multicast transmissions complicate their implementation as there is no longer one single channel to optimize the transmission for. In this paper, a new approach to loading for OFDM on wireless multicast systems is proposed. We show that a great performance enhancement can be expected in ideal conditions. After deriving an upper bound for the error rate in these conditions, we study the performance degradation occurring with imperfect channel state information.

Keywords

OFDM modulation; Rayleigh channels; adaptive modulation; multicast communication; Rayleigh fading channel; adaptive bit; adaptive modulation; adaptive power-loading; channel state information; multicast OFDM transmission; multicast transmission; orthogonal frequency division multiplexing; wireless multicarrier system; wireless multicast system; Bit error rate; Channel state information; Energy consumption; Error analysis; Fading; Multicast algorithms; OFDM modulation; Telecommunications; Transmitters; Unicast;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communication Systems, 2006. ISWCS '06. 3rd International Symposium on

Conference_Location

Valencia

Print_ISBN

978-1-4244-0398-1

Electronic_ISBN

978-1-4244-0398-1

Type

conf

DOI

10.1109/ISWCS.2006.4362323

Filename

4362323