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US 7,746,269 B2Granted
DME ground apparatus
AssigneeKabushiki Kaisha Toshiba
InventorYukihiro Kamimura
Life of this patent
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Abstract
The transponder unit provided in a DME ground apparatus detects the transmission rate at which to transmit the pulse-pairs constituting a response signal. The threshold of the reception level of the pulse detection unit provided in the transponder unit is raised as the transmission rate increases.
Claims7
A distance measuring equipment (DME) ground apparatus comprising:
- an aerial unit that receives an interrogation signal from an aircraft;
- a transponder unit that receives the interrogation signal from the aerial unit, generates a response signal in response to the interrogation signal and transmits the response signal to the aircraft;
- and
- a monitor control unit that monitors and controls the transponder unit, wherein
- the transponder unit controls a threshold of a reception level in accordance with a rate at which to transmit pulse-pairs constituting the response signal, so as to process a response to an interrogation signal that has a reception level higher than a threshold value and not to process a response to an interrogation signal having a reception level lower than the threshold value, in order to prevent a pulse-pair transmission rate from exceeding an upper limit.
2 more elements
Dependencies are inferred from the claim text.