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. 01, 1994
Filed:
Jan. 29, 1993
Paul R Christian, Schaumburg, IL (US);
Casimir Karczewski, Lake Villa, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A simulcast transmission system (100) utilizes adaptive demodulation to provide a method and apparatus for automatic delay equalization measurements. The simulcast transmission system (100) comprises a control station (101), and a plurality of remote transmission stations (201, 301) capable of re-transmitting a received delay equalization measurement signal which includes at least a correction bit pattern signal followed by a synchronization pattern signal. The control station (101) comprises a transmitter (131, 181) which transmits the delay equalization measurement signal, a receiver (151, 191) which receives the re-transmitted delay equalization measurement signal, a correlator (115, 762) which correlates the received synchronization pattern signal to obtain a coarse time of reception, a correction bit pattern analyzer (115, 776-802) which analyzes the received correction bit pattern signal to derive a fine reception time correction factor, and a time corrector (115, 804) which corrects the coarse time of reception with the fine reception time correction factor to obtain a corrected time of reception of the delay equalization measurement signal at the control station (101).