Pulse or digital communications – Equalizers
Reexamination Certificate
2008-04-22
2008-04-22
Ghebretinsae, Temesghen (Department: 2611)
Pulse or digital communications
Equalizers
C375S232000, C375S326000, C375S324000
Reexamination Certificate
active
07362802
ABSTRACT:
The present invention relates to wireless communications and is particularly applicable to devices and modules for correcting errors introduced to a wireless signal after its transmission. An equalizer is provided which compensates for undesirable effects on received radio signals introduced by either signal processing or by the transmission medium. In operation, the equalizer multiples the complex received signal with a complex corrective signal that compensates for these effects. A tap corrective signal corrects for time-varying channel effects (i.e. channel distortions), a timing tracking signal corrects for carrier frequency offset errors, and a phase tracking signal corrects for sampling frequency offset errors.
REFERENCES:
patent: 6389062 (2002-05-01), Wu
patent: 6567480 (2003-05-01), Brardjanian et al.
patent: 2003/0128751 (2003-07-01), Vandenameele-Lepla
patent: 2003/0210645 (2003-11-01), Gummadi et al.
patent: 2004/0109508 (2004-06-01), Jeon et al.
patent: 9839872 (1998-09-01), None
patent: WO 98/39872 (1998-09-01), None
patent: 03049390 (2003-06-01), None
patent: WO 03/049390 (2003-06-01), None
Sliskovic “Carrier and Sampling frequency Offset Estimation and Correction in Multicarrier Systems” IEEE 2001.
Lei et al “Improved Joint Carrier and Sampling frequency Offset Estimation Scheme for OFDM Systems” Globecom, IEEE 2003.
International Search Report for PCT/CA2004/001564 dated Jan. 25, 2005.
Ghebretinsae Temesghen
Stolowitz Ford Cowger LLP
Zarbana Digital Fund LLC
LandOfFree
Frequency domain equalizer for wireless commuications system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Frequency domain equalizer for wireless commuications system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Frequency domain equalizer for wireless commuications system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2774767