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:
Jun. 23, 2009
Filed:
Sep. 17, 2004
Iterative and turbo-based method and apparatus for equalization of spread-spectrum downlink channels
Jianzhong (Charlie) Zhang, Irving, TX (US);
Hoang Nguyen, Davis, CA (US);
Giridhar Mandyam, Plano, TX (US);
Joe Dowling, Athlone, IE;
Jianzhong (Charlie) Zhang, Irving, TX (US);
Hoang Nguyen, Davis, CA (US);
Giridhar Mandyam, Plano, TX (US);
Joe Dowling, Athlone, IE;
Nokia Corporation, Espoo, FI;
Abstract
A system, terminal, receiver and method are provided for receiving and processing a signal received from a spread-spectrum downlink channel. The method includes receiving the signal from the downlink channel, and generating an estimate of a transmitted chip sequence in accordance with an iterative process. In this regard, the iterative process includes calculating statistical information, such as a mean and covariance, for a previous iteration of a transmitted chip sequence, the statistical information being selectively calculated based upon one of soft bits and soft symbols associated with the previous iteration of the transmitted chip sequence. The estimate for a current iteration of the chip sequence is then generated based upon the statistical information.