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. 27, 1984
Filed:
Dec. 01, 1980
Robert A Maher, Richardson, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A global position system (GPS) capable of multiple (two or more space vehicles) space vehicle (SV) multiplexing comprises an RF energy receiver for receiving high and low frequencies (L.sub.1 and L.sub.2) from a plurality of SVs on different codes, a switching means for alternately switching the RF receiver between the coded L.sub.1, L.sub.2 signals for detection, a digital processing means, replica coded L.sub.1, L.sub.2 signal producing hardware, and a coherent time and frequency synthesis means, said digital processing means connected to the RF receiver, coherent time and frequency synthesis means, and replica coded L.sub.1, L.sub.2 signal producing hardware for producing for the RF receiver replica coded L.sub.1, L.sub.2 signals for each SV to be tracked and adjusting with respect to the coherent time and frequency synthesis circuit the states of the hardware replica receiver signals to align them with corresponding signals of each of the SVs at a rate that supports sampled data closed-loop tracking of the SVs without reacquisition of each SV being tracked.