High-sensitivity satellite-borne ADS-B signal receiver

Abstract

The invention discloses a high-sensitivity satellite-borne ADS-B signal receiver. The high-sensitivity satellite-borne ADS-B signal receiver comprises a radio frequency circuit, a local oscillator (LO) circuit, a frequency mixing circuit, an intermediate-frequency circuit, an AD sampling circuit, a digital logic chip and a microcontroller. The radio frequency circuit is used for receiving and amplifying an ADS-B radio frequency signal and filtering out interference and out-of-band noise. The LO circuit is used for generating an LO signal. The frequency mixing circuit is used for conducting frequency mixing on the LO signal and the ADS-B radio frequency signal to obtain an intermediate-frequency signal. The intermediate-frequency circuit is connected with the frequency mixing circuit and used for filtering out an interference signal in the intermediate-frequency signal. The AD sampling circuit is connected with the intermediate-frequency circuit and used for achieving analog-digital conversion to obtain a digital intermediate-frequency signal. The digital logic chip is connected with the AD sampling circuit and used for processing the digital intermediate-frequency signal from the AD sampling circuit. The microcontroller is connected with the digital logic chip and used for receiving message information from the digital logic chip and storing the message information in a mini flash memory card. By means of the high-sensitivity satellite-borne ADS-B signal receiver, the problem that in the prior art, an existing ADS-B signal receiver is low in sensitivity is solved.

Description

technical field [0001] The invention relates to the field of receivers, in particular to a high-sensitivity satellite-borne ADS-B signal receiver. Background technique [0002] Automatic Dependent Surveillance-Broadcast (ADS-B) uses omnidirectional broadcasting to broadcast air-to-air and air-to-ground reports, and the aircraft automatically transmits its own position information to surrounding aircraft, vehicles and ground receiving devices Wait. In addition to air-to-air surveillance and air-to-ground surveillance, the ADS-B signal receiver can also achieve other functions, such as: air planes can automatically identify each other's positions and maintain a safe distance; ground ATC can monitor the receiving terminal and The aircraft flying on the air route implements monitoring and command; the aircraft and vehicles on the ground at the airport maintain a safe distance and play the role of ground surveillance. [0003] After the existing ADS-B signal receiver receives t...

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a high-sensitivity satellite-borne ADS-B signal receiver, to solve the problem of low sensitivity of the ADS-B signal receiver in the prior art, and can greatly widen the receiving range of the signal at the same time

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