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. 11, 2003
Filed:
Jun. 03, 1999
Stephen Michael Hladik, Albany, NY (US);
General Electric Company, Niskayuna, NY (US);
Abstract
The signaling overhead required for pilot symbol aided modulation is significantly reduced by recognizing that the residual uncertainty in the carrier frequency decreases after an initial carrier frequency estimate is made during an initial signal interval. This allows a commensurate reduction in channel process sampling rate during the remainder of the message; i.e., the frequency uncertainty of the pilot symbols can be decreased. This technique may be particularly effective when the rate of change of the received carrier frequency and phase is low as in fixed satellite terminal equipment. The resultant increase in spectral efficiency makes reduced-overhead pilot symbol aided modulation attractive for applications in low-cost/low-complexity terminal equipment.