Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2002-09-03
2008-05-20
Ghayour, Mohammed (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S346000, C375S150000
Reexamination Certificate
active
07376176
ABSTRACT:
The present invention relates to a method and an apparatus for adjusting an average interval of channel estimation dynamically based on Doppler-shift. The method comprises the steps of estimating Doppler-shift by using level cross rate (LCR) according to differently moving speeds of mobile terminals, determining the optimal average interval of channel estimation based on the relationship between the existing Doppler-shift and the optimal average interval of channel estimation, dynamically adjusting the average interval of channel estimation according to the determined the optimal average interval of channel estimation to make the coherent receiver obtain the optimal estimation performance at different moving speeds. The apparatus of the present invention comprises a channel estimation module, a valid/strongest finger selection module, a RAKE demodulation and combining module, a RAKE output decision module, an LCR detection and Doppler-shift estimation module, a Gaussian noise power estimation module, a strongest path signal power estimation module, and an optimal average interval calculation module.
REFERENCES:
patent: 6182251 (2001-01-01), Rahnema et al.
patent: 6529850 (2003-03-01), Wilborn et al.
patent: 6647055 (2003-11-01), Kuo
patent: 6842624 (2005-01-01), Sarkar et al.
patent: 1312625 (2001-09-01), None
patent: 1332583 (2002-01-01), None
patent: WO 0117185 (2001-03-01), None
Sakamoto et al, “Adaptive channel estimation with velocity estimator for W-CDMA receiver”, May 15-18, 2000, IEEE 51st Vehicular Conference Proceedings, 2000, vol. 3, pp. 2024-2028.
Jiang Liangcheng
Ma Zhangyong
You Xiaohu
Zhao Chunming
Ghayour Mohammed
Panwalkar Vineeta
Southeast University
The Research Institute of Telecommunication Transmission, MII
Westman Champlin & Kelly P.A.
LandOfFree
Method and equipment for regulating dynamically an average... 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 equipment for regulating dynamically an average..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and equipment for regulating dynamically an average... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3986757