Asynchronous DS-CDMA receiver
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United States of America Patent
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Jul 21, 2015
Grant Date -
Dec 5, 2013
app pub date -
Jun 4, 2012
filing date -
Jun 4, 2012
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Abstract
Methods, apparatus, and systems are provided for collecting data from a plurality of downhole sensors located in a wellbore utilizing an asynchronous direct-sequence code division multiple access (DS-CDMA)-based communication scheme. One example method includes receiving a superposed signal comprising asynchronous signals from the downhole sensors, wherein a spreading sequence has been applied to data generated by each of the downhole sensors to form each of the asynchronous signals; sampling the received superposed signal; and processing the sampled superposed signal using decorrelation to determine the data from at least one of the downhole sensors before the spreading sequence was applied.
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