Pulse or digital communications – Receivers
Reexamination Certificate
2011-03-15
2011-03-15
Ahn, Sam K (Department: 2611)
Pulse or digital communications
Receivers
Reexamination Certificate
active
07907682
ABSTRACT:
An apparatus and method for initial fractional frequency offset estimation are provided. In an apparatus for estimating an initial fractional frequency offset in a Broadband Wireless Access (BWA) communication system, the apparatus includes a sample power calculator for calculating a power of input sample data and for calculating an average power of a specific symbol, a power threshold comparator for comparing the sample data power in magnitude with the average power of the specific symbol and for outputting one of an accumulation ON and OFF signal, a first buffer for correlating a last data of the sample data with the sample data and for storing sample data corresponding to a preset number of correlation results, a second buffer for storing sample data corresponding to correlation results other than the sample data stored in the first buffer; and an accumulator for allowing accumulation of sample data stored in the second buffer if the power threshold comparator outputs the accumulation ON signal.
REFERENCES:
patent: 6628707 (2003-09-01), Rafie et al.
patent: 7613104 (2009-11-01), Bhatt et al.
patent: 7738589 (2010-06-01), Kim et al.
Hwang Yong-Sun
Lim In-Chun
Song Bong-Gee
Ahn Sam K
Jefferson IP Law, LLP
Samsung Electronics Co,. Ltd.
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