Diversity circuit for magnetic communication system
First Claim
Patent Images
1. A magnetic inductance communications system, comprising:
- a first transmission/reception coil producing a magnetic field including a transmitted signal;
a plurality of second transmission/reception coils having different orientations for receiving the transmitted signal and generating a plurality of received signals;
a summing circuit for combining the plurality of received signals to produce a summed signal;
at least one first phase adjusting circuit for adjusting a phase of at least one respective received signal prior to summing to increase the amplitude of the summed signal; and
a modulator circuit for modulating a signal to be transmitted, wherein the modulator circuit includes;
at least one second phase adjusting circuit receiving a carrier signal and a phase adjustment signal from the at least one first phase adjusting circuit;
a plurality of driving circuits, each driving circuit receiving the signal to be transmitted and a respective output signal from one of the second phase adjusting circuits, for generating a respective driving signal on one of the plurality of second transmission/reception coils to generate a second magnetic field; and
signal processing circuitry connected to the first transmission/reception coil to receive the signal in the second magnetic field.
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Abstract
A magnetic communication system includes a transmitter have a single coil transducer, and a receiver having a three orthogonally oriented coil transducers. The signal processing circuitry in the receiver adjusts the phases of the signals received by the three transducers to produce signals which are in-phase. The signals are then summed to provide an output signal from the receiver. The processing circuitry adjusts the phases of the incoming signals either serially or in parallel. Transmissions from the receiver to the transmitter are also phase adjusted in accordance with the same adjustments used in reception.
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Citations
65 Claims
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1. A magnetic inductance communications system, comprising:
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a first transmission/reception coil producing a magnetic field including a transmitted signal;
a plurality of second transmission/reception coils having different orientations for receiving the transmitted signal and generating a plurality of received signals;
a summing circuit for combining the plurality of received signals to produce a summed signal;
at least one first phase adjusting circuit for adjusting a phase of at least one respective received signal prior to summing to increase the amplitude of the summed signal; and
a modulator circuit for modulating a signal to be transmitted, wherein the modulator circuit includes;
at least one second phase adjusting circuit receiving a carrier signal and a phase adjustment signal from the at least one first phase adjusting circuit;
a plurality of driving circuits, each driving circuit receiving the signal to be transmitted and a respective output signal from one of the second phase adjusting circuits, for generating a respective driving signal on one of the plurality of second transmission/reception coils to generate a second magnetic field; and
signal processing circuitry connected to the first transmission/reception coil to receive the signal in the second magnetic field. - View Dependent Claims (2, 3)
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4. A magnetic inductance communication system comprising:
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a first transmission/reception coil producing a magnetic field including a transmitted signal;
a plurality of second transmission/reception coils having different orientations for receiving the transmitted signal and generating a plurality of received signals;
a plurality of amplitude determining circuits corresponding to the plurality of second transmission/reception coils for determining amplitudes of the plurality of received signals;
a modulator circuit for modulating a signal to be transmitted, wherein the modulator circuit includes;
a plurality of driving circuits each driving circuit receiving a carrier signal to be transmitted for generating a respective driving signal on one of the plurality of transmission/reception coils to generate a second magnetic field; and
a selection circuit for activating at least one of the driving circuits based upon the amplitudes of the received signals; and
signal processing circuitry connected to the first transmission/reception coil to receive the signal in the second magnetic field. - View Dependent Claims (5, 6, 7)
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8. A method for communicating, the method comprising the steps of:
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receiving an inductive input signal on each of multiple uniquely oriented transducers;
generating an electronic signal corresponding to the received inductive input signal for each of the transducers;
compensating for a relative motion of the transducers with respect to the inductive input signal by adjusting a phase of at least one of the electronic signals; and
summing the aligned electronic signals to produce an output signal that corresponds to the inductive input signal. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for communicating, the method comprising the steps of:
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orienting each of multiple transducers along a unique axis to generate a magnetic field;
identifying a target receiver to which the magnetic field is transmitted; and
adjusting a phase output of the multiple transducers to produce the magnetic field for the target receiver. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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27. A method for communicating, the method comprising the steps of:
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receiving an inductive input signal on each of multiple uniquely oriented receiver transducers, the inductive input signal being received from a remote source transducer;
generating an electronic signal from each of the receiver transducers, each electronic signal corresponding to the inductive input signal;
based on a phase difference of the electronic signals, adjusting a phase of at least one of multiple transmitter transducers to produce an inductive output signal that is transmitted to a target receiver transducer near the remote source transducer. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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42. A method for communicating, the method comprising the steps of:
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receiving an inductive input signal on each of multiple uniquely oriented receiver transducers, the inductive input signal being generated from a remote source transducer;
producing an electronic signal that corresponds to the inductive input signal for each of the receiver transducers, a level of each electronic signal being proportional to a strength of the received inductive input signal at a corresponding receiver transducer;
tracking a phase of each electronic signal during motion of the remote source transducer relative to the multiple uniquely oriented receiver transducers; and
based on the phase of at least one electronic signal, adjusting an inductive output signal from a transmitter transducer for communicating with a target receiver. - View Dependent Claims (43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53)
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54. A system for communicating, the system comprising:
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multiple uniquely oriented receiver transducers, each of which receives an inductive input signal, the inductive input signal being generated from a remote source transducer;
a circuit coupled to the receiver transducers that produces an electronic signal corresponding to the inductive input signal for each of the receiver transducers, the phase of each electronic signal being a function of the position and orientation of the remote source relative to the multiple uniquely oriented receiver transducers;
a detection circuit that detects the phase of each electronic signal based upon a reception of the inductive input signal; and
a driver circuit that generates an inductive output signal from a based on the phase of at least one of the produced electronic signals. - View Dependent Claims (55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65)
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Specification