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:
Jun. 14, 2005
Filed:
Dec. 07, 2000
Applicants:
Stephane Laurent Baills, Toulouse, FR;
Ouelid Abdesselem, Toulouse, FR;
Karine Griesmann, Toulouse, FR;
Inventors:
Stephane Laurent Baills, Toulouse, FR;
Ouelid Abdesselem, Toulouse, FR;
Karine Griesmann, Toulouse, FR;
Assignee:
Motorola Inc., Schaumburg, IL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H04L027/00 ; H04B007/26 ; H04J003/06 ;
U.S. Cl.
CPC ...
Abstract
The invention relates to a radio communication system in which a time slot of a frame of a multiframe signal allocated to the frequency control channel is modulated using an 8PSK modulation scheme to contain a tone having a frequency which GMSK modulation is unsuited to generate. This enables COMPACT-format signals to be distinguished from GSM-format signals and ensures backwards compatibility with all existing GSM mobile stations.