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:
Mar. 16, 1982
Filed:
Mar. 03, 1980
Richard D Gitlin, Monmouth Beach, NJ (US);
Bell Telephone Laboratories, Incorporated, Murray Hill, NJ (US);
Abstract
An adaptive phase-jitter compensator, which is frequency selective, is disclosed for use in data receivers. The filter section (28) of the adaptive compensator receives a derived phase error signal and its own weighted sum output to provide the difference between them as selective noisy estimates of the actual phase via taps of a delay line (52-1 to 52-L). A multiplier (57) accepts each tap signal and the phase error to form a product used to update the coefficients or tap weights used in the filter section. An upmodulator (29) impresses the weighted sum output on a carrier signal whose output is used by a lookup table (31) to form components to be compatible with the received data signal. A complex multiplier, (23), multiplies the components and the data signal which has been previously split into components and equalized, to provide both demodulation and phase-jitter compensation.