Patent ID: 11802479

Abstract:
A telemetry system includes a downhole device configured to generate modulated pressure pulses in drilling fluid within a drill string, first and second transducers configured provide first and second telemetry signals, respectively, responsive to pressure variations in the drilling fluid, and a telemetry computer coupled to the transducers. The telemetry computer includes a processor and a memory coupled to the processor. The memory contains instructions that, when executed by the processor, cause the telemetry computer to be configured to transform the first and second telemetry signals to a time-frequency domain representation to provide first and second time-frequency telemetry signals, respectively; and apply an unmixing filter to the first and second time-frequency telemetry signals to provide an enhanced signal in the time-frequency domain. The enhanced signal has a source signal component separated from a noise component, and the first and second telemetry signals are mixed source-noise signals.