Differential space-time block-coded OFDMA for frequency-selective fading channels

Chen, Zhonglin and Zhu, Guangxi and Cai, Wei and Ni, Qiang (2003) Differential space-time block-coded OFDMA for frequency-selective fading channels. In: Personal, Indoor and Mobile Radio Communications, 2003. PIMRC 2003. 14th IEEE Proceedings on. IEEE, BEIJING, pp. 2171-2175. ISBN 0-7803-7822-9

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Abstract

Combining, differential Alamouti space-time block code (DASTBC) with orthogonal frequency-division multiple access (OFDMA). this paper introduces a multiuser/multirate transmission scheme, which allows full-rate and full-diversity noncoherent communications using two transmit antennas over frequency-selective fading channels. Compared with the existing differential space-time coded OFDM designs, our scheme imposes no restrictions on signal constellations, and thus can improve the spectral efficiency by exploiting efficient modulation techniques such as QAM, APSK etc. The main principles of our design are as follows: OFDMA eliminates multiuser interference, and converts multiuser environments to single-user ones; Space-time coding achieves performance improvement by exploiting space diversity available with multiple antennas, no matter whether channel state information is known to the receiver. System performance is evaluated both analytically and with simulations.

Item Type: Contribution in Book/Report/Proceedings
Uncontrolled Keywords: /dk/atira/pure/researchoutput/libraryofcongress/qa75
Subjects:
Departments: Faculty of Science and Technology > School of Computing & Communications
ID Code: 59630
Deposited By: ep_importer_pure
Deposited On: 20 Nov 2012 10:03
Refereed?: Yes
Published?: Published
Last Modified: 01 Jan 2020 05:39
URI: https://eprints.lancs.ac.uk/id/eprint/59630

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