Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2008-07-22
2008-07-22
Tran, Khai (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S130000
Reexamination Certificate
active
07403557
ABSTRACT:
Provided are improved systems and methods for spread spectrum communication employing hybrid Eb/No and pilot-based finger lock determination for RAKE receivers. Finger lock thresholds are periodically set using an extended time-averaged Eb/No traffic signal estimate for each finger mapped to an Ec/No pilot level, where the extended time-averaged Eb/No estimate is inversely proportional to the mapped Ec/No level, thus, decreasing the required Ec/No level when the Eb/No estimate increases and increasing the required Ec/No level when the Eb/No estimate decreases. Existing pilot-based finger lock algorithms may be used with the Ec/No threshold set using the extended time-averaged Eb/No estimate. When pilot signals are weak but traffic signals remain strong, fingers will remain locked to increase the combiner output signal-to-noise ratio.
REFERENCES:
patent: 5648983 (1997-07-01), Kostic et al.
patent: 5754583 (1998-05-01), Eberhardt et al.
patent: 5818866 (1998-10-01), Wilk
patent: 5862453 (1999-01-01), Love et al.
patent: 5889768 (1999-03-01), Storm et al.
patent: 6078611 (2000-06-01), La Rosa et al.
patent: 6269075 (2001-07-01), Tran
patent: 6320898 (2001-11-01), Newson et al.
patent: 6345078 (2002-02-01), Basso
patent: 6370183 (2002-04-01), Newson et al.
patent: 6408039 (2002-06-01), Ito
patent: 6442193 (2002-08-01), Hirsch
patent: 6526031 (2003-02-01), Zaff et al.
patent: 6542483 (2003-04-01), Dinc et al.
patent: 6600777 (2003-07-01), Glazko
patent: 6625197 (2003-09-01), Lundby et al.
patent: 6711420 (2004-03-01), Amerga et al.
patent: 6728304 (2004-04-01), Brown et al.
patent: 2001/0030948 (2001-10-01), Tiedemann, Jr.
patent: 2002/0101909 (2002-08-01), Chen et al.
patent: 2002/0105375 (2002-08-01), Sorokine
patent: 2003/0142732 (2003-07-01), Moshavi et al.
patent: 2003/0171136 (2003-09-01), Peng
patent: 2003/0231701 (2003-12-01), Lugil
patent: 2004/0063420 (2004-04-01), Hayata
patent: WO 02/29996 (2002-04-01), None
Enhanced Maximal Ratio Combining For Rake Receivers in Mobile CDMA Terminals, K. Kettunen, Nokia, 5 pages.
Adaptive Step Size RAKE Receiver for DS/CDMA Communications Over a Rayleigh Fading Channel, K. W. Wong et al., University of Leeds, 4 pages.
RAKE Receiver with Adaptive Interference Cancellers for a DS-CDMA System in Multipath Fading Channels, J. Yi et al., School of Electrical Engineering, Seoul National University, 5 pages.
A RAKE Structured SINR Maximizing Mobile Receiver for the WCDMA Downlink, M. Lenardi et al., Institut Eurecom, Sophia Antipolis Cedex, France, 5 pages.
Estimation of Time-Varying Wireless Channels and Application to the UMTS W-CDMA FDD Downlink, M. Lenardi et al., Institute Eurecom, Sophia Antipolis Cedex, France, 6 pages.
CDMA—Online, http://www.cdmaonline.com/interactive/workshops/terms1/1035.htm, Jul. 7, 2004, 2 pages.
CDMA—Online, http://www.cdmaonline.com/interactive/workshops/terms1/1043.htm, Jul. 8, 2004, 1 page.
CDMA—Online, http://www.cdmaonline.com/interactive/workshops/terms1/1078.htm, Jul. 8, 2004, 1 page.
CDMA—Online, http://www.cdmaonline.com/interactive/workshops/terms1/1030.htm, Jul. 8, 2004, 1 page.
What's All This Eb/NoStuff, Anyway?, J. Pearce (With Apologies to Bob Pease), http://www.sss-mag.com/ebn0.html, 3 pages.
CDMA—Online, http://www.cdmaonline.com/interactive/workshops/terms1/1001.htm, Jul. 8, 2004, 2 pages.
CDMA—Online, http://www.cdmaonline.com/interactive/workshops/terms1/1020.htm, Jul. 8, 2004, 2 pages.
CDMA FAQ: Glossary, http://home.san.rr.com/denbeste/glossary.html, Jul. 8, 2004, 6 pages.
Liu Fenghua
Pan Li
Shah Jigneshkumar
Alston & Bird LLP
Nokia Corporation
Tran Khai
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