Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2006-04-25
2006-04-25
Vo, Don N. (Department: 2631)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S150000
Reexamination Certificate
active
07035319
ABSTRACT:
A method of and data processing system for determining whether a received signal in a Code Division Multiple Access system that uses an antenna array includes a desired signal with a predetermined timing offset, the method including correlating607the received signal with a spreading code having the predetermined timing offset and corresponding to the desired signal at each element of the antenna array to provide correlations; determining613a power distribution, such as a DFT, corresponding to the correlations that is a function of a direction of arrival of the received signal; comparing614a magnitude of the power distribution at a first direction of arrival to a threshold that has a value that varies with the direction of arrival; and when the threshold is satisfied, determining619or indicating that the desired signal is likely present at the first direction of arrival.
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Sheng Chengke
Thron Chris
Turner Ivra Leon
Bethards Charles W.
Freescale Semiconductor Inc.
Vo Don N.
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