MODE 5 DETECTION PROCESS USING PHASE AND AMPLITUDE CORRELATION

A receiver (22) in a mode 5 air traffic control system (20) provides amplitude and phase signal outputs a digital data stream containing preamble and flight information from data transmitted from an aircraft. A signal splitter (24) divides the amplitude and phase signal outputs between an odd channe...

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Bibliographische Detailangaben
1. Verfasser:	ALON, YAIR
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ANALOGOUS ARRANGEMENTS USING OTHER WAVES BASIC ELECTRONIC CIRCUITRY CODE CONVERSION IN GENERAL CODING DECODING DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES ELECTRICITY LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MEASURING PHYSICS RADIO DIRECTION-FINDING RADIO NAVIGATION SIGNALLING TESTING TRAFFIC CONTROL SYSTEMS
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Beschreibung
Zusammenfassung:	A receiver (22) in a mode 5 air traffic control system (20) provides amplitude and phase signal outputs a digital data stream containing preamble and flight information from data transmitted from an aircraft. A signal splitter (24) divides the amplitude and phase signal outputs between an odd channel (26) and an even channel (28) that carry odd-numbered pulses and even-numbered pulses, respectively. An odd channel data decoder (32) connected to the signal splitter (24) extracts signals encoded in the odd channel (26) and forms an odd data stream and an even channel data decoder (26) connected to the signal splitter extracts signals encoded in the even channel (28) and forming an even data stream. A preamble correlator (38) correlates the odd and even data streams with a predefined preamble mask to detect potential valid preambles, and preamble decision logic processes (48) signals output from the preamble correlator (38) to identify which of the preambles actually are actually valid.