Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2005-07-14
2010-10-19
Lugo, David B (Department: 2611)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
C375S346000
Reexamination Certificate
active
07817732
ABSTRACT:
According to the disclosure, a system adapted to estimate and track a channel for wireless orthogonal frequency division modulation (OFDM) communication is disclosed. The system utilizes scattered pilot symbols being subject to channel conditions and estimates the channel value using the plurality of received pilot symbols and in accordance with correlation of the channel conditions over time.
REFERENCES:
patent: 6904550 (2005-06-01), Sibecas et al.
patent: 7072783 (2006-07-01), Makhlouf et al.
patent: 2004/0132460 (2004-07-01), Lee
patent: 2005/0201447 (2005-09-01), Cairns et al.
patent: 2003-218826 (2003-07-01), None
patent: 2005151447 (2005-06-01), None
patent: 9834381 (1998-08-01), None
patent: WO 02096049 (2002-11-01), None
patent: WO2004017586 (2004-02-01), None
Schafhuber et al., “Kalman Tracking of Time-Varying Channels in Wireless MIMO-OFDM Systems,” Institute of Communications and Radio-Frequency Engineering, Vienna University of Technology, XP010702345 (2003).
Hong He et al., “Low-Complexity Kalman Channel Estimator Structures for OFDM Systems With and Without Virtual Carriers,” IEEE International Conference on Paris, France, XP010709701 (2004).
Sen et al., “Joint Channel Tracking and Symbol Detection for OFDM Systems with Kalman Filtering,” AEU International Journal of Electronics and Communications, XP004959696 (2003).
PCT/US2005/025175, Notification of Transmittal of the International Search Report and the Written Opinion of the International Searching Authority, Mailed on Nov. 11, 2005.
Maniatis, et al., “Pilots for joint channel estimation in multi-user ofdm mobile radio systems,” Spread Spectrum Techniques and Applications, 2002 IEEE Seventh International Symposium, Sep. 2, 2002, pp. 44-48, XP010615562.
International Preliminary Report on Patentability—PCT/US05/025175, IPEA/US—Alexandria, VA Apr. 6, 2007.
Beladi Sayed H.
Lugo David B
Milikovsky Dmitry R.
Qualcomm Incorporated
LandOfFree
Channel tracking with scattered pilots does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Channel tracking with scattered pilots, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Channel tracking with scattered pilots will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4228978