Systems and Methods for Downhole OFDM Communications

[0022]One or more embodiments of the invention are described below. It should be noted that these and any other embodiments described below are exemplary and are intended to be illustrative of the invention rather than limiting.

[0023]As described herein, various embodiments of the invention comprise systems and methods for reliably communicating data at high data rates between surface and downhole equipment over a power cable using orthogonal frequency division multiplexing (OFDM).

[0024]The present systems and methods utilize high-temperature semiconductor devices (e.g., DSP's) to provide the computational power necessary to implement OFDM communications in the harsh conditions that exist downhole in a wellbore. In one embodiment, the surface equipment includes a controller such as a variable speed drive that provides three-phase power over a power cable to an electric submersible pump (ESP) system. A gauge package is connected to the motor of the ESP system. The gauge package receives