Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2007-04-10
2007-04-10
Corrielus, Jean B. (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S142000, C375S144000, C375S148000, C375S149000, C375S150000
Reexamination Certificate
active
09760094
ABSTRACT:
The invention relates to a code-tracking method and a rake receiver for CDMA communication systems of low complexity yielding stable tracking. Received signal are distributed to a plurality of receiver fingers of a rake receiver. Each receiver finger i is assigned to a signal path of the transmitted signal which is subject to phase shift and power dissipation due to reflection, diffraction and scattering. According to the invention in each receiver finger i an estimation of the timing delay {circumflex over (τ)}(i)is provided and interference from other signal components j are subtracted from signal components of the current signal path i (i≠j) yielding a reliable estimated timing delay {circumflex over (τ)}.
REFERENCES:
patent: 5361276 (1994-11-01), Subramanian
patent: 5463660 (1995-10-01), Fukasawa et al.
patent: 5719899 (1998-02-01), Thielecke et al.
patent: 5790588 (1998-08-01), Fukawa et al.
patent: 5828705 (1998-10-01), Kroeger et al.
patent: 5978423 (1999-11-01), Farjh
patent: 5987014 (1999-11-01), Magill et al.
patent: 6034986 (2000-03-01), Yellin
patent: 6137788 (2000-10-01), Sawahashi et al.
patent: 6154443 (2000-11-01), Huang et al.
patent: 6175587 (2001-01-01), Madhow et al.
patent: 6215814 (2001-04-01), Ylitalo et al.
patent: 6269075 (2001-07-01), Tran
patent: 6272189 (2001-08-01), Garin et al.
patent: 6456648 (2002-09-01), Bultan et al.
patent: 6456653 (2002-09-01), Sayeed
patent: 6473415 (2002-10-01), Kim et al.
patent: 6480526 (2002-11-01), Shoki et al.
patent: 6532254 (2003-03-01), Jokinen
patent: 6535549 (2003-03-01), Scott et al.
patent: 6567482 (2003-05-01), Popovic′
patent: 6570909 (2003-05-01), Kansakoski et al.
patent: 6570918 (2003-05-01), Rademacher
patent: 6600729 (2003-07-01), Suzuki
patent: 6633553 (2003-10-01), Hwang
patent: 6661835 (2003-12-01), Sugimoto et al.
patent: 6683924 (2004-01-01), Ottosson et al.
patent: 6707844 (2004-03-01), Imaizumi et al.
patent: 6714585 (2004-03-01), Wang et al.
patent: 6747969 (2004-06-01), Hirsch
patent: 6757346 (2004-06-01), Saito et al.
patent: 6768727 (2004-07-01), Sourour et al.
patent: 6785323 (2004-08-01), Proctor, Jr.
patent: 6798737 (2004-09-01), Dabak et al.
patent: 6865218 (2005-03-01), Sourour
patent: 2001/0028677 (2001-10-01), Wang et al.
patent: 2002/0034218 (2002-03-01), Papasakellariou et al.
patent: 2002/0044592 (2002-04-01), Razzell
patent: 2002/0051486 (2002-05-01), Aue
patent: 2002/0131479 (2002-09-01), Butler et al.
patent: 2003/0091104 (2003-05-01), Yellin
patent: 2003/0193914 (2003-10-01), Lomp et al.
patent: 2005/0265430 (2005-12-01), Ozluturk et al.
patent: 0 849 887 (1997-12-01), None
patent: 0 993 127 (1999-10-01), None
patent: WO 95/34140 (1995-12-01), None
patent: WO 00/21209 (2000-04-01), None
W. Sheen, et al, “A Noncoherent Tracking Loop With Diversity and Multipath Interference Cancellation for Direct-Sequence Spread-Spectrum Systems”, “IEEE Transactions On Communications, Nov. 1998 vol. 46, No. 11” pp. 1516-1524.
H. Huang, et al, “Improving Detection and Estimation in Pilot-Aided Frequency Selective CDMA Channels” “IEEE 6thInternational Conference On Universal Person Communications, 1997 vol. 1,” pp. 198-201.
European Search Report, dated Jul. 24, 2000.
Vijay K. Garg, “IS-95 CDMA and CDMA 2000,” Prentice Hall PTR, 2000, pp. 60-70.
Andreas Wilde, “Extended Tracking Range Delay-Locked Loop,” 1995 IEEE, German Aerospace Research Establishment (DLR), Germany, pp. 1052-1054.
Volker Aue et al., “A Non-Coherent Tracking Scheme for the RAKE Receiver That Can Cope With Unresolvable Multipath,” ICC '99, Vancouver, Canada, Jun. 1999, pp. 1-5.
Andrew J. Viterbi, “CDMA Principles of Spread Spectrum Communication,” Addison-Wesley Publishing Company, Library of Congress Cataloging-in-Publication Data, ISBN 0-201-63374-4, 1995, pp. 1-245.
Heinrich Meyr et al., “Digital Communication Receiver Synchronization, Channel Estimation, and Signal Processing,” Wiley Series in Telecommunications and Signal Processing, Wiley-Interscience Publication, 1998, pp. 1-827.
Baltersee Jens
Fock Gunnar
Schulz-Rittich Peter
Agere Systems Inc.
Corrielus Jean B.
LandOfFree
Method and rake receiver for code-tracking in communication... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and rake receiver for code-tracking in communication..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and rake receiver for code-tracking in communication... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3784918