Flexible OFDM Schemes for Bursty Transmissions

Author

Couillet, Romain ; Debbah, Mérouane

Author_Institution

ST-NXP Wireless, Supelec, Sophia Antipolis

fYear

2009

fDate

5-8 April 2009

Firstpage

1

Lastpage

6

Abstract

In this paper, alpha-OFDM, a generalization of the OFDM modulation, is proposed to enhance the outage capacity of bursty transmissions. This new flexible modulation scheme is easily implemented and only requires a symbol rotation of angle alpha after the IDFT stage. The induced rotation slides the DFT window and provides frequency diversity in block fading channels. Interestingly, the results show a substantial gain in terms of outage capacity and BER in comparison with classical OFDM modulation schemes. The framework is extended to multiuser/multi-antenna OFDM based standards. Simulations, in the context of 3GPP LTE, called hereafter alpha-LTE, sustain our theoretical claims.

Keywords

OFDM modulation; channel capacity; discrete Fourier transforms; diversity reception; fading channels; 3GPP LTE; BER; DFT window; block fading channels; bursty transmissions; flexible alpha-OFDM scheme; frequency diversity; multiantenna OFDM; multiuser OFDM; orthogonal frequency division multiplexing; outage capacity; symbol rotation slides; Bit error rate; Communications Society; Context modeling; Delay; Discrete Fourier transforms; Fading; Frequency diversity; OFDM modulation; Transmitting antennas; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking Conference, 2009. WCNC 2009. IEEE

Conference_Location

Budapest

ISSN

1525-3511

Print_ISBN

978-1-4244-2947-9

Electronic_ISBN

1525-3511

Type

conf

DOI

10.1109/WCNC.2009.4917727

Filename

4917727