Pulse or digital communications – Receivers – Automatic baseline or threshold adjustment
Reexamination Certificate
2007-09-04
2007-09-04
Fan, Chieh M. (Department: 2611)
Pulse or digital communications
Receivers
Automatic baseline or threshold adjustment
C375S285000, C375S346000, C327S307000
Reexamination Certificate
active
10689330
ABSTRACT:
Although DC offset reduction schemes can be applied in the analog domain, the residual static DCO in baseband is still present, significantly influencing the performance of high-level modulation schemes employed by recent high-data-rate wireless communications standards. In order to achieve satisfactory performance, DCO compensation algorithms are required in the digital domain. One such algorithm was developed which is based on joint estimation of the Channel Impulse Response (CIR) and the static DCO and ensures satisfactory performance of EDGE modem with direct conversion radio architectures. A further modification of the joint estimation algorithm, the so-called “perturbed joint L”, results in further improvement in the performance of the EDGE equalizer in critical fading channels.
REFERENCES:
patent: 5990218 (1999-11-01), Hill et al.
patent: 6228933 (2001-05-01), Hiles
patent: 6269131 (2001-07-01), Gothe et al.
patent: 6370205 (2002-04-01), Lindoff et al.
patent: 6542560 (2003-04-01), Buehrer et al.
patent: 7133442 (2006-11-01), Hamdi
patent: WO 01/06683 (2001-01-01), None
patent: WO 01/31867 (2001-05-01), None
“Joint Channel and DC Offset Estimation and Synchronization with Reduced Computational Complexity for an EDGE Receiver,” Krakovszky et al.IEEE. 2001. Siemens AG-Mobile Phones.
“Using a Direct Conversion Receiver in Edge Terminals, -A New DC Offset Compensation Algorithm,” Bengt Lindoff.IEEE. 2000. Erisson Mobile Communications AB.
“Enhanced DC Estimation via Sequence-Specific Frequency Offset,” Hui et al.IEEE2002. Ericsson Mobile Platforms, AB.
Kocic Marko
Martinot Lidwine
Zvonar Zoran
Analog Devices Inc.
Fan Chieh M.
Gauthier & Connors LLP
Tu Julia P
LandOfFree
Method for joint DC offset correction and channel... 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 for joint DC offset correction and channel..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for joint DC offset correction and channel... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3756330