Multi-element magnetic receiver for interference suppression and signal enhancement

A signal processing system comprising:

• a plurality of antenna elements configured to receive a magnetic communication signal having an amplitude containing magnetic communication data and interference;
• a processor configured to receive a plurality of signals from the antenna elements, wherein the processor is operative measure the relative amplitudes of a plurality of received signals from each antenna element, measure interference contained in a plurality of received signals from each antenna element, calculate a plurality of weights indicative of the measured amplitudes and measured interference, and generate a weighted sum of the received signals;
• wherein the interference is measured over a time interval in which the magnetic communication data is absent from the plurality signals receive from each antenna.

A direction finding system comprising:

• a plurality of antenna elements configured to receive a magnetic communication signal having an amplitude containing magnetic communication data and interference;
• a processor configured to receive a plurality of signals from the antenna elements, wherein the processor is operative to calculate a covariance of the received plurality of signals, and generate a vector indicative of an estimated direction and magnitude of the received signals from the calculated covariance, and wherein the calculated covariance includes the covariance of interference contained in a plurality of received signals measured over a time interval in which the magnetic communication data is absent from the plurality signals receive from each antenna.