Guard interval length selection in an OFDM system based on...

Details Guard interval length selection in an OFDM system based on... Guard interval length selection in an OFDM system based on...

2007-02-24

2011-12-20

Payne, David C. (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

Reexamination Certificate

active

08081693

ABSTRACT:
A system, apparatus and methods are described that select a guard interval length (345) for a multi-path communications channel. In one embodiment, the guard interval length is selected based on a relationship between a selected coherence bandwidth (335) and a RMS delay (340) of the communication channel.

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Zhang Zhao-yang et al., A Novel OFDM Transmission Scheme with Length-Adaptive Cyclic Prefix, Nov. 2003, Journal of Zhejiang niversity Science, ISSN 1009-3095.
Moraitis, Delay Spread Measurements and Charcterization in a Special Propagation Environment for PCS Microcells, 2002, IEEE.
Zhang, A Novel OFDM Transmission Scheme With Length-Adaptive Cyclic Prefix, 2004, Journal of Zhejiang University Science.
Zhang Zhao-Yang; “A Novel OFDM Transmission Scheme With Length-Adaptive Cyclic Prefix”. Journal of Zhejiang University. Science, Zhejiang University Press, Hangzhou, CN, vol. 5, No. 11, Jul. 7, 2003, pp. 1336-1342.
Fitton M P et al; “A Comparison of RMS Delay Spread and Coherance Bandwidth for Characterisation of Wideband Channels”. Proceedings of the 1996 IEE Colloquium on Propagation Aspects of Future Mobile Systems. Oct. 5, 1996, pp. 9/1-9/6.
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