Channel impulse response estimation
First Claim
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1. A method of estimating the impulse response of a channel, the method comprising:
- controlling a transmitter to transmit an ultrasonic signal into the channel;
receiving a received signal from the channel at a receiver; and
calculating an estimate of the impulse response of the channel by applying a generalized inverse matrix, calculated from a matrix representing the transmitted signal, to the received signal.
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Abstract
A human-machine interface system adapted to track movement of an object in air is disclosed. In one aspect, the human-machine interface includes an acoustic transmitter, an acoustic receiver, and logic configured to apply a calculated inverse matrix of an impulse signal transmitted by the acoustic transmitter to a signal received by the acoustic receiver, wherein movement of the object is used to control the machine.
27 Citations
20 Claims
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1. A method of estimating the impulse response of a channel, the method comprising:
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controlling a transmitter to transmit an ultrasonic signal into the channel; receiving a received signal from the channel at a receiver; and calculating an estimate of the impulse response of the channel by applying a generalized inverse matrix, calculated from a matrix representing the transmitted signal, to the received signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus comprising:
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a transmitter arranged to transmit an ultrasonic signal into a channel; a receiver arranged to receive a received signal from the channel; and logic configured to calculate an estimate of the impulse response of the channel by applying a generalized inverse matrix, calculated from a matrix representing the transmitted signal, to the received signal. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification