Data-fusion receiver

Abstract From the Canadian patent

This invention, as shown in Figure 1, is an ultra-low frequency electromagnetic telemetry receiver that fuses multiple received input sources to synthesize decodable message packets from noise corrupted telemetry strings. Blocks of telemetry data sent to the surface receiver from borehole tool are digitally encoded into data packets prior to transmission. Data packets are modulated onto the ULF EM carrier wave (11) transmitted borehole-to-surface , and simultaneously detected by multiple sensors (E (t)) disbursed within the rig environment. The receiver (15) utilizes a suite of decision metrics to reconstruct the original, non-noise- corrupted data packets from the observation matrix …