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. 23, 2008
Filed:
Apr. 27, 2005
Philip A. Bolt, Stoke Gabriel, GB;
Timothy G. Wild, Totnes, GB;
Gregor R. Dean, Seaton, GB;
Paul Clark, Paignton, GB;
Peter N. Strong, Newton Abbot, GB;
Richard A. Carter, Paignton, GB;
Antony C. Holmes, Torquay, GB;
Colin H. V. Spier, Exeter, GB;
Nigel J. R. King, South Brent, GB;
Philip A. Bolt, Stoke Gabriel, GB;
Timothy G. Wild, Totnes, GB;
Gregor R. Dean, Seaton, GB;
Paul Clark, Paignton, GB;
Peter N. Strong, Newton Abbot, GB;
Richard A. Carter, Paignton, GB;
Antony C. Holmes, Torquay, GB;
Colin H. V. Spier, Exeter, GB;
Nigel J. R. King, South Brent, GB;
Mototola, Inc., Schaumburg, IL (US);
Abstract
A wireless broadband communications system that can maintain high data rates while taking into account channel interference resulting from operating in shared frequency bands, signal fading resulting from dynamic channel degradation, and signal distortion resulting from compliance with maximum power output regulations. In one mode of operation, the system performs adaptive modulation by transmitting a first signal over a selected channel using a first modulation mode having a level of distortion associated therewith resulting from operating the system at a predetermined maximum power output level. Next, a SINAD level is measured on the first channel. The level of distortion associated with the first modulation mode is then subtracted from the measured SINAD level to obtain a first noise level. In the event the first noise level is less than a noise level required to achieve an acceptable error rate in a next modulation mode, a second signal is transmitted over the selected channel using the next modulation mode.