System, method and apparatus for wireless channel parameter...

Pulse or digital communications – Receivers – Interference or noise reduction

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C375S148000, C375S144000, C455S296000

Reexamination Certificate

active

07012977

ABSTRACT:
The present invention provides a system, method and apparatus for estimating channel parameters in spread spectrum communication systems. A first method is accomplished by receiving a base station signal and then demodulating the base station signal. After demodulating the base station signal, a maximum signal is selected from the base station signal. If the maximum signal is the common pilot channel, then the channel parameters are estimated directly from the common pilot channel. If the maximum signal is not the common pilot channel, then the demodulated base station signal is iteratively fed back for further demodulation and re-selection of the maximum signal until the maximum signal is the common pilot channel. A second method is accomplished by incorporating channel estimates made from the interfering signals in a constructive manner to the first method.

REFERENCES:
patent: 4878251 (1989-10-01), Richardson
patent: 5537443 (1996-07-01), Yoshino et al.
patent: 5905946 (1999-05-01), Lilleberg et al.
patent: 6009089 (1999-12-01), Brink et al.
patent: 6172969 (2001-01-01), Kawakami et al.
patent: 6501788 (2002-12-01), Wang et al.
patent: 6574270 (2003-06-01), Madkour et al.
patent: 2003/0012217 (2003-01-01), Andersson et al.
patent: 1 041 727 (2000-10-01), None
patent: WO 00 55992 (2000-09-01), None
Madkour, Mohamed F. Gupta, S.C., Wang, Yi-Pin E., A Novel Downlink Blind Interference Cancellation in a W-CDMA Mobile Communications System, Proceedings of the IEEE Wireless Communications and Networking Conference, WCNC '99, New Orleans, Sep. 21-25, 1999.
Madkour, Mohamed F., Gupta,. S.C., Wang, Yi-Pin E., A Subspace Projection Based Blind Interference Cancellation Scheme for W-CDMA Downlink, Proceedings of the 33rdAsilomar Conference, Pacific Grove, CA, Oct. 24-27, 1999.
Hottinen, Ari, Holma, Harri, Toskala, Antti, Multi-User Detection for Multirate CDMA Communications, Nokia Research Center, Irving, Texas, USA and Helsinki, Finland, IEEE, 1996 pp 1819-1823.
Juntti, Markku K., System Concept Comparisons for Multirate CDMA with Multiuser Detection, University of Oulu, Telecomm Lab., Oulu, Finland, 1998 VIC '98 IEEE, pp. 36-40.
Johansson, Ann-Louise, Svensson, Arne, Successive Interference Cancellation in Multiple Data Rate DS/CDMA Systems, Chalmers University of Technology, Department of Information Theory, Gothenburg, Sweden, 1995 IEEE pp. 704-708.
Patel, Pulin, Holtzman, Jack, Analysis of a Simple Successive Interference Cancellation Scheme in a DS/CDMA System, IEEE Journal of Selected Areas in Communications, vol. 12, No. 5, Jun. 1994, pp796-807.

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

System, method and apparatus for wireless channel parameter... does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

     

Profile ID: LFUS-PAI-O-3607677

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