Pulse or digital communications – Receivers
Reexamination Certificate
2005-07-08
2009-11-10
Ghayour, Mohammad H (Department: 2611)
Pulse or digital communications
Receivers
C375S324000, C375S342000, C375S354000, C375S355000
Reexamination Certificate
active
07616707
ABSTRACT:
A received signal is sampled at a sampling period of T+m*(T
) during a sampling phase determination process. T is a symbol or chip period of the received signal, n is a number of phases of the sampled signal, T
is a phase resolution period, and m is a fixed non-zero integer value where −n<m<n (e.g. m=1 or −1). By sampling the received signal at the sampling period of T+m*(T
), a sample set for each one of n phases of the sampled signal is produced. For each sample set, a correlation process is performed between the sample set and a predetermined correlation signal to produce a correlation result. Once an optimal correlation result is identified from the correlation process, the received signal is sampled at a sampling period of T at a phase associated with the optimal correlation result. Advantageously, oversampling at a sampling rate of n/T is not required during the sampling phase determination process, which reduces cost and power consumption.
REFERENCES:
patent: 3440548 (1969-04-01), Saltzberg
patent: 4893316 (1990-01-01), Janc et al.
patent: 5590160 (1996-12-01), Ostman
patent: 5841814 (1998-11-01), Cupo
patent: 6130920 (2000-10-01), Powell et al.
patent: 6151353 (2000-11-01), Harrison et al.
patent: 6167258 (2000-12-01), Schmidt et al.
patent: 6456677 (2002-09-01), Hiramatsu et al.
patent: 6717996 (2004-04-01), Du Reau et al.
patent: 6724847 (2004-04-01), Kallman et al.
patent: 6728306 (2004-04-01), Shi
patent: 7295601 (2007-11-01), Sinha et al.
patent: 2005/0084037 (2005-04-01), Liang
Kevin J. Quirk & Meera Srinivasan, “Analysis Of Sampling And Quantization Effects On The Performance Of PN Code Tracking Loops”, International Conference On Communications, Apr. 28, 2002, pp. 1480-1484, XP01589734, vol. 1 of 5, New York.
European Search Report for Application No. 05254306.3, Dec. 20, 2005.
Ghayour Mohammad H
Oskorep, Esq. John J.
Research In Motion Limited
Vlahos Sophia
LandOfFree
Methods and apparatus for reducing a sampling rate during a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Methods and apparatus for reducing a sampling rate during a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and apparatus for reducing a sampling rate during a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4054686