United States Patent 7,502,424
Hoffmann , et al. March 10, 2009
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Maximizing data rate by adjusting codes and code rates
Abstract
The present invention provides for making code rate adjustments and modulation type adjustments in a pseudonoise (PN) encoded CDMA system. Coding rate adjustments may be made by changing the number of information bits per symbol, or Forward Error Code (FEC) coding rate. A forward error correction (FEC) block size is maintained at a constant amount. Therefore, as the number of information bits per symbol are increased, an integer multiple of bits per epoch is always maintained. The scheme permits for a greater flexibility and selection of effective data rates providing information bit rates ranging from, for example, approximately 50 kilobits per second to over 5 mega bits per second (Mbps) in one preferred embodiment.
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Inventors: Hoffmann; John E. (Indialantic, FL), Nelson, Jr.; George Rodney (Merritt Island, FL), Riley; Daniel I. (West Melbourne, FL), Rouphael; Antoine J. (Escondito, CA), Proctor, Jr.; James A. (Indialantic, FL)
Assignee: IPR Licensing, Inc. (Wilmington, DE)
Appl. No.: 11/633,970
Filed: December 5, 2006
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Related U.S. Patent Documents
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Application Number Filing Date Patent Number Issue Date
11264847 Nov., 2005 7145964
09773253 Jan., 2001 6973140
09447022 Nov., 1999 6785323
09263358 Mar., 1999
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Current U.S. Class: 375/316 ; 329/304; 375/324; 375/329
Current International Class: H04L 27/06 (20060101)
Field of Search: 375/135,146,253,261,262,242,265,298,130,295,308,316,324,329,340 714/786,72,79,752 329/304,311,300
