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:
Sep. 01, 1998
Filed:
Jun. 04, 1997
Applicant:
Inventors:
Christopher Koszarsky, Holly Springs, NC (US);
John Northcutt, Chapel Hill, NC (US);
Michael Nowak, Cary, NC (US);
Assignee:
Ericsson Inc., Research Triangle Park, NC (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03D / ;
U.S. Cl.
CPC ...
375340 ; 4552262 ; 455142 ;
Abstract
To differentiate between different types of modulation, a fast RSSI detector performs a RSSI measurement on a received signal. The output of the RSSI detector is sampled over a sampling window and generates sampled values. A processor calculates absolute values of piecewise first derivatives of the sampled values and sums the result to create a summation constant. A modulation detector determines the type of modulation based on the value of the summation constant and an RSSI compensation calculates a compensation factor to correct the RSSI measurement.