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:
Nov. 15, 1994
Filed:
Sep. 27, 1993
Abstract
In a first direct-sequence spread spectrum communication system having a transmission circuit where a data signal to be transmitted is coded by a first chip code signal and a receiving circuit for decoding the transmitted data signal with a second chip code signal, the synchronization between the said first and second chip code signals is performed when an asynchronous condition of said first and second chip code signals is detected over a predetermined interval. In a second direct-sequence spread spectrum communication system having a transmission circuit where a data signal having a variable data rate V to be transmitted is coded by a first chip signal having a data rate C and coded by a reference code signal having a data rate R, C>V, R>V. A receiving circuit receives the data signal from the above-mentioned transmission circuit decoded by a second chip signal and a second reference code signal. This receiving circuit has a lowpass filter and it is unnecessary to change the lowpass filter if the data rate V is lower than R. A third system combines these techniques.