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. 03, 2009
Filed:
Sep. 17, 2007
Antoine J. Rouphael, Escondido, CA (US);
John E. Hoffmann, Indialantic, FL (US);
George Rodney Nelson, Jr., Merrit Island, FL (US);
Samir K. Patel, Melbourne Beach, FL (US);
James A. Proctor, Jr., Indialantic, FL (US);
Daniel I. Riley, West Melbourne, FL (US);
Antoine J. Rouphael, Escondido, CA (US);
John E. Hoffmann, Indialantic, FL (US);
George Rodney Nelson, Jr., Merrit Island, FL (US);
Samir K. Patel, Melbourne Beach, FL (US);
James A. Proctor, Jr., Indialantic, FL (US);
Daniel I. Riley, West Melbourne, FL (US);
IPR Licensing, Inc., Wilmington, DE (US);
Abstract
A single, common correlation filter (CF) core is provided in a receiver for recovery of data from received code division multiple access (CDMA) signals. Signals are received over CDMA channels with different data rates, where the received signals include user information such as pilot and data symbols that have been spread according to different despreading rates including tiertierand tierrates, where tieris the smallest despreading rate. The received signal is correlated at the smallest despreading rate in the correlation filter (CF) by time multiplexing delayed versions of the pseudorandom noise (PN) code. The correlated information is then demultiplexed and pilot-aided QPSK demodulated. The demodulated information is summed at the proper integer multiple of the tierrate to achieve tierand tierdespreading rates. According to an embodiment, the three strongest multipaths components in terms of the received power are selected in a window or time period for optimal information recovery.