Athletic Performance Monitoring Systems and Methods in a Team Sports Environment
First Claim
1. A system for determining a proximity between a player and a ball in a game, the system comprising:
- a transceiver located on the player, the transceiver configured to;
send a sweep signal to a radio tag, the sweep signal having a sweep frequency changing according to a predetermined pattern;
the radio tag located on the ball, the radio tag configured to;
receive the sweep signal; and
generate a return signal at a different frequency than the sweep frequency; and
the transceiver further configured to;
simultaneously receive the return signal while sending the sweep signal;
determine a frequency difference between the return signal a current frequency of the sweep signal; and
approximate a distance between the player and the ball based on the frequency difference.
3 Assignments
0 Petitions
Accused Products
Abstract
Systems, apparatuses, and methods estimate the distance between a player and a ball by transmitting a chirp (sweep signal) to a radio tag located on the ball. During the chirp, the frequency of the transmitted signal is changed in a predetermined fashion. The radio tag doubles the transmitted frequency and returns the processed signal to a transceiver typically located on the player. The currently transmitted frequency is then compared with the received frequency to obtain a difference frequency from which an apparatus may estimate the distance. The apparatus may simultaneously receive the processed signal from the radio tag while transmitting the sweep signal.
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Citations
21 Claims
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1. A system for determining a proximity between a player and a ball in a game, the system comprising:
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a transceiver located on the player, the transceiver configured to; send a sweep signal to a radio tag, the sweep signal having a sweep frequency changing according to a predetermined pattern; the radio tag located on the ball, the radio tag configured to; receive the sweep signal; and generate a return signal at a different frequency than the sweep frequency; and the transceiver further configured to; simultaneously receive the return signal while sending the sweep signal; determine a frequency difference between the return signal a current frequency of the sweep signal; and approximate a distance between the player and the ball based on the frequency difference. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for determining a distance between a player and a ball in a game, the method comprising:
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starting transmission of a sweep signal to a radio tag on the ball, a sweep frequency of the sweep signal changing in accordance with a predetermined pattern; simultaneously receiving a return signal from the radio tag while transmitting the sweep signal; comparing a received frequency of the return signal with a current sweep frequency to obtain a frequency difference; and estimating the distance between the player and the ball from the frequency difference. - View Dependent Claims (10, 11, 12, 13)
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14. An apparatus for estimating a distance between a player and a ball, the apparatus located on the player, the apparatus comprising:
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a radio section configured to; send a sweep signal to a radio tag, the sweep signal having a sweep frequency changing according to a predetermined pattern; simultaneously receive a return signal from a radio tag located on the ball while sending the sweep signal; and obtain a frequency difference between the return signal a current sweep frequency of the sweep signal; and a processor configured to; approximate the distance between the player and the ball based on the frequency difference. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A radio tag located on a ball for determining a distance between a player and the ball in a game, the radio tag comprising:
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an antenna for receiving at a sweep frequency and for transmitting at twice the sweep frequency; and a frequency doubler circuit configured to; receive a sweep signal through the antenna from an apparatus located on the player; and simultaneously generate a return signal at twice the sweep frequency through the antenna while receiving the sweep signal. - View Dependent Claims (21)
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Specification