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. 11, 2003
Filed:
Nov. 03, 1998
Henry Scott Caldwell, Melbourne Beach, FL (US);
Charles Raymond Burr, Jr., Palm Bay, FL (US);
International Communications Products, Inc., Melbourne, FL (US);
Abstract
The standard BPSK modulation and encoding mechanisms employed by the head end of a satellite-linked DATS communication system are replaced with digital video broadcast standard QPSK modulation and Viterbi/Reed-Solomon error correction encoding that are effective to provide significantly improved link performance. Each downlinked receiver site is retrofitted with a front end link adapter interface that is operative to demodulate the link-efficient, replacement modulation and coding to baseband, and then convert the demodulated and MPEG-based packetized baseband signals into an original TDM aggregate baseband signal which is then remodulated and encoded into the communication protocol used by the existing non-upgraded receiver, so that the in-place receiver may demodulate the signal.