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:
Apr. 30, 2002
Filed:
Oct. 30, 1998
Applicant:
Inventors:
Ming He, Houston, TX (US);
Ce Richard Liu, Sugarland, TX (US);
Assignee:
Compaq Information Technologies Group, L.P., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 2/722 ;
U.S. Cl.
CPC ...
H04L 2/722 ;
Abstract
A receiver for receiving an analog signal that is digitally modulated using differential binary phase shift keying (DBPSK) and demodulated by a quadrature demodulator into two signals. The receiver converts the two signals into two digital signals using 2-bit analog-to-digital converters. Samples of these digital signals are then encoded according to a maximum likelihood criteria algorithm and decisions are made based on the signal constellation, which identifies the original data transmitted.