Patent ID: 7532901

Claim:
A method of detecting a position of a first transducer assembly with respect to a second transducer assembly, the method comprising: at the first transducer assembly, receiving magnetic field signals from the second transducer assembly, the magnetic field signals including communication data; and based on magnitudes of the magnetic field signals received on the first transducer assembly, identifying a position in space of the first transducer assembly with respect to the second transducer assembly, the first transducer assembly including M uniquely oriented transducers, where M is an integer equal to one or more, the second transducer assembly including N uniquely oriented transducers, where N is an integer equal to one or more; and wherein the M uniquely oriented transducers in the first transducer assembly are substantially orthogonal with respect to each other and the N uniquely oriented transducers in the second transducer assembly are substantially orthogonal with respect to each other.