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:
May. 21, 2002
Filed:
Oct. 08, 1998
Josef H. Schuermann, Oberhummel, DE;
Jurgen Anton Mayer, Kissing, DE;
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
In the method for the transfer of a digital data signal with predetermined band width from a transmitter to a receiver, the spread spectrum technique is used. In the method, the data signal is modulo-2 added with a PN code sequence, the bit rate of which is very much higher than the bit rate of the data signal. A carrier is then modulated with the resulting spread signal, after which the carrier is transmitted. The modulated carrier is demodulated in a receiver and the demodulated signal, to obtain the data signal, is multiplied with the PN code sequence produced in the receiver, synchronized with the PN code sequence of the transmitter by autocorrelation. A periodic rectangular signal with a constant duty cycle is used as code sequence.