Controlling Survey Source Signal Phases
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United States of America Patent
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Issued Date -
Jun 25, 2015
app pub date -
Dec 15, 2014
filing date -
Dec 20, 2013
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Abstract
A controller controls phases of signals produced by survey sources according to a frequency of the signals. The controlling includes controlling the survey sources to be in phase for frequencies less than a predetermined frequency, and randomizing phases of the signals emitted by the survey sources for frequencies greater than the predetermined frequency, wherein the randomizing includes applying a smoothing operator in a specified frequency range, and emit signals with different phases for frequencies greater than the predetermined frequency.
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