Iterative and turbo-based method and apparatus for...

Pulse or digital communications – Spread spectrum – Direct sequence

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C375S148000, C375S140000

Reexamination Certificate

active

07551664

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.

REFERENCES:
patent: 5659573 (1997-08-01), Bruckert et al.
patent: 6556557 (2003-04-01), Cimini et al.
patent: 6690723 (2004-02-01), Gosse et al.
patent: 2004/0165675 (2004-08-01), Ito et al.
patent: 2004/0223480 (2004-11-01), Nguyen et al.
patent: 2005/0089112 (2005-04-01), Piechocki et al.
Jianzhong (Charlie) Zhang, Hoang Nguyen, Giridhar Mandyam;LMMSE-Based Iterative and Turbo Equalization Methods for CDMA Downlink Channels; 2005; pp. 231-235; IEEE 6thWorkshop on Signal Processing Advances in Wireless Communications; 2005 IEEE.
Y. Sun, M. Yee, M. Sandell;Iterative Channel Estimation with MIMO MMSE-Turbo Equalisation; Vehicular Technology Conference; 2003; pp. 1278-1282; vol. 2; 2003 IEEE.
Eric Hardouin, Christophe Laot;Iteractive Channel Equalization for the Multicode DS-CDMA Downlink; Vehicular Technology Conference; 2003; pp. 1857-1861; vol. 3; 2003 IEEE.
Jurgen Robler, Johannes Huber;MMSE-Based Iterative Equalization with Soft Feedback for Transmission with General Square QAM Constellations; International Conference on Publ. 2003; pp. 3267-3271; vol. 5; 2003 IEEE.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Iterative and turbo-based method and apparatus for... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Iterative and turbo-based method and apparatus for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Iterative and turbo-based method and apparatus for... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-4077125

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.