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:
Aug. 26, 2008
Filed:
Nov. 16, 2001
Dayong Chen, Cary, NC (US);
Leonard Lee, Cary, NC (US);
Dayong Chen, Cary, NC (US);
Leonard Lee, Cary, NC (US);
Ericsson Inc., Research Triangle Park, NC (US);
Abstract
A wireless communications system receiver classifies a received burst as a DTX-high state normal burst or a DTX-low state truncated burst with a high probability of success. D1, the Euclidean distance between the known CDVCC and the bit position of CDVCC in a normal burst, is determined by calculating a confidence-weighted correlation between the two bit patterns. In a high-noise environment, D2, the Euclidean distance between the known CDVCC and the bit position of CDVCC in a truncated burst, is calculated. The ratio D1/D2 is compared to a threshold to classify the DTX state of the received burst. D1 and D2 may be normalized by dividing by the maximum average RSSI over the received burst, plotted on a graph of normalized D1 vs. normalized D2, and compared to a predetermined thresholding function that minimizes the probability of false classification. The thresholding function may be a piece-wise linear curve.