Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2006-07-04
2006-07-04
Patel, Jay K. (Department: 2631)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S148000
Reexamination Certificate
active
07072381
ABSTRACT:
A communication device includes at least one of path search means for detecting respective timings of path components included a signal received via a multipath propagation path using pilot symbols of a known phase included in said received signal and channel estimation means for estimating channel variation using the pilot symbols. The path search means includes a first path search part for detecting respective timings of path components using pilot symbols and a second path search part for detecting respective timings of path components using information symbols derived from a signal demodulated according to the timings detected in the first path search part and pilot symbols. The channel estimation means includes a pilot symbol acquiring part for acquiring pilot symbols included in the received signal and a channel estimation part for implementing channel estimation using the acquired pilot symbols.
REFERENCES:
patent: 5283811 (1994-02-01), Chennakeshu et al.
patent: 5805648 (1998-09-01), Sutton
patent: 6175558 (2001-01-01), Miya
patent: 6208632 (2001-03-01), Kowalski et al.
patent: 6240099 (2001-05-01), Lim et al.
patent: 6430166 (2002-08-01), Bejjani et al.
patent: 6466606 (2002-10-01), Jou
patent: 6661835 (2003-12-01), Sugimoto et al.
patent: 6700919 (2004-03-01), Papasakellariou
patent: 6804264 (2004-10-01), Song
patent: 2 260 227 (2002-08-01), None
patent: 9-8770 (1997-01-01), None
patent: 10-233713 (1998-09-01), None
patent: 11-68700 (1999-03-01), None
patent: 2000-252867 (2000-09-01), None
patent: 2001-53644 (2001-02-01), None
patent: 2001053644 (2001-02-01), None
patent: 2001053644 (2001-02-01), None
patent: 2000-0046044 (2000-07-01), None
patent: 2000-0046184 (2000-07-01), None
patent: 2001-0054456 (2001-07-01), None
patent: 10054456 (2001-07-01), None
Abeda Performánce comparisons of coherent SC/DS-CDMA, MC/DS CDMA.and MC-CDMA methods in downlink broadband wireless packet transmission. Technical research report RCS99-130 the Institute of Electronics, Information and Communication Engineers Oct. 15, 1999.
S. Abeta, et al., Technical Report of IEICE. A P99-133, RCS99-130, vol. 99, No. 357, pp. 63-70, “Performance Comparisons of Coherent SC/DS-CDMA, MC/DS-CDMA, MC-CDMA on Down-Link Broadband Radio Packet Transmission,” Oct. 15, 1999 (Submitting English translation only).
H. Atarashi, et al., Technical Report of IEICE. A P99-134, RCS99-131, vol. 99, No. 357, pp. 71-77, “Performance Comparisons of Coherent SC/DS-CDMA, MC/DS-CDMA on Up-Link Broadband Radio Packet Transmission,” Oct. 15, 1999 (submitting English translation only).
T. Kumagai, et al., Proceedings of the B-5-91 of Communications Society Meeting, the Institute of Electronics, Information and Communication Engineers, pp. 326, “An Improved Channel Equalization Scheme for OFDM Wireless LAN Systems,” Aug. 16, 1999 (submitting English translation only).
A. Higashi, et al., Technical Report of IEICE A P94-74, RCS94-98, vol. 94, No. 312, pp. 57-62, “Performance of Coherent Rake Detection Using Interpolation on DS/CDMA,” Oct. 28, 1994 (submitting English translation only).
T. Ishii, et al., Proceedings B-5-27 of General Meeting, The Institute of Electronics, Information and Communication Engineers, pp. 414, “Repeatedly Updated Channel Estimation for DS-CDMA with Decision Feedback and Extrapolation,” Mar. 6, 1997 (submitting English translation only).
M. Nakamura, et al., Proceedings B-5-60 of Communication Society Meeting, the Institute of Electronics, Information and Communication Engineers, pp. 310, “A Study of Decision Feedback Channel Estimation for W-CDMA,” Sep. 7, 1998 (submitting English translation only).
Abeta Sadayuki
Atarashi Hiroyuki
Sawahashi Mamoru
NTT DoCoMo Inc.
Patel Jay K.
Torres Juan Alberto
LandOfFree
Path search method, channel estimation method and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Path search method, channel estimation method and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Path search method, channel estimation method and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3552959