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:
Feb. 14, 1995
Filed:
Oct. 08, 1993
Applicant:
Inventors:
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04J / ; H04J / ;
U.S. Cl.
CPC ...
370 98 ; 3701101 ; 3701104 ; 359124 ; 359156 ; 359187 ;
Abstract
A transmission system includes a transmitter for transmitting to a communication channel a send signal which is a combination of a main signal and an auxiliary signal. The send signal is received by a receiver which recovers the auxiliary signal therefrom, and which includes a frequency control loop having a bandwidth which is larger than that of the auxiliary signal. Recovery of the auxiliary signal by a frequency control loop reduces the complexity of the receiver. By including a series of digital symbols in the auxiliary signal, it is possible to send additional information along with the main signal without requiring any significant increase in complexity of the transmission system.