METHOD AND SYSTEM FOR DETECTING AND DECODING AIR TRAFFIC CONTROL REPLY SIGNALS
First Claim
1. A system for detecting an edge of a received signal associated with air traffic control communications, the system comprising:
- an A/D converter to convert a received signal to a series of digital data samples; and
an edge detector module to determine a change rate between the data samples, the edge detector module validating an edge of the received signal based on the change rate between the data samples.
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Accused Products
Abstract
A method and system are provided for detecting an edge of a received signal associated with air traffic control communications. The system includes an A/D converter to convert a received signal to a series of digital data samples and an edge detector module to determine a change rate between the data samples. The change rate represents a change in amplitude between the data samples per unit of time. The edge detector module validates an edge of the received signal based on the change rate between the data samples. A decoder module may derive timing information from the leading/trailing edge pulses and associates the reply message with the framing pulse based on the timing information.
93 Citations
20 Claims
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1. A system for detecting an edge of a received signal associated with air traffic control communications, the system comprising:
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an A/D converter to convert a received signal to a series of digital data samples; and an edge detector module to determine a change rate between the data samples, the edge detector module validating an edge of the received signal based on the change rate between the data samples. - View Dependent Claims (2, 3, 4, 5)
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6. A method for detecting an edge of a received signal associated with air traffic control communications, the method comprising:
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converting a received signal to a series of digital data samples; and determining a change rate between the data samples; validating an edge of the received signal based on the change rate between the data samples. - View Dependent Claims (7, 8, 9, 10)
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11. A system for decoding received signals associated with an air traffic control communication, the system comprising:
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an A/D converter to convert received signals to a series of digital data samples, the data samples defining reply and framing pulses; and an edge detector module to detect edges of the reply and framing pulses and, in response thereto, outputting leading edge pulses; and a decoder deriving timing information from the leading/trailing edge pulses, the decoder associating a reply message with the framing pulses based on the timing information. - View Dependent Claims (12, 13, 14)
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16. A method for decoding received signals associated with an air traffic control communication, the method comprising:
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converting received signals to a series of digital data samples, the data samples defining reply and framing pulses; and detecting edges of reply messages pulses and framing pulses and, in response thereto, outputting leading/trailing edge pulses; and deriving timing information from the leading/trailing edge pulses and associating each reply message pulse with an appropriate one of the framing pulse based on the timing information. - View Dependent Claims (17, 18, 19, 20)
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Specification