The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 04, 2012
Filed:
Jun. 27, 2002
John Hudson, Stansted, GB;
John Hudson, Stansted, GB;
Apple Inc., Cupertino, CA (US);
Abstract
A communications system comprising a base station, and a plurality of terminals served by that base station which may include an ad-hoc network of terminals. Information from the base station or transmitting terminal is transported to the receiving terminals in the form of symbols in an orthogonal frequency division multiplexed format. Each terminal has means for measuring a channel dispersion and rate of phase variation corresponding to multipath signal reception for that terminal and for reporting that dispersion and variation measure to the transmitting station. In response to the channel dispersion and phase change measurements, the base station or transmitting terminal is arranged to provide, for groups of terminals having a similar channel dispersion, respective symbol and prefix lengths on the basis of the dispersion measurement of that group of terminals.