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. 10, 2009
Filed:
May. 11, 2005
Charles R. Giardina, Mahwah, NJ (US);
Charles R. Giardina, Mahwah, NJ (US);
BAE Systems Information and Electronic Systems Integration Inc., Nashua, NH (US);
Abstract
Training sequences, for transmittal with an individual data packet via a wireless communication channel, enable estimation of the channel impulse response (CIR) to provide values usable for correction of multipath and other transmission disturbances with enhanced security and avoidance of complex processing. Training sequences employing several groupings of pseudonoise sequences enable a receiver to derive several observations of the CIR for each data packet received. Averaging of values of the several CIR estimations provides a CIR estimation of increased accuracy usable in determining coefficients to adjust taps of an adaptive equalizer for signal correction for the data of the packet. Training sequences with use of distinct pseudonoise sequences in several individual groupings enhance security, while simplifying processing by avoidance of necessity for multiplication or division of complex functions. Training sequences, systems and methods are described.