| 摘要 |
<p>Methods, apparatus, and systems are provided for collecting data from a plurality of downhole sensors 204 located in a wellbore utilizing an asynchronous direct-sequence code division multiple access (DS-CDMA)-based communication scheme. The method includes receiving a superposed signal comprising asynchronous signals from the downhole sensors 204, 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 204 before the spreading sequence was applied.</p> |
