Air vehicle measurement and control system with upper and down links utilizing different spectrum spreading systems

Abstract

The invention discloses an air vehicle measurement and control system with upper and down links utilizing different spectrum spreading systems. An upper remote control link of the system is based on a direct spreading_frequency hopping mixed spectrum spreading system, and a down remote measuring link of the system utilizes a direct sequence spectrum spreading system. The air vehicle measurement and control system is divided into an air vehicle part and a ground station part, wherein an air vehicle parameter data collection module, a data processing module, a remote measuring data frame transmission and framing module, a direct sequence spectrum spreading modulation module, a transmitter, a transmission antenna, a receiving antenna, a radio frequency front end module, a spreading frequency hopping mixed demodulation module and a remote control data frame receiving and decoding module are carried on the air vehicle; and the ground station part comprises an instruction processing module, a remote control data frame transmission and framing module, a spreading frequency hopping mixed modulation module, a ground station transmitter, a ground station transmission antenna, a ground station receiving antenna, a ground station radio frequency front end module, a direct sequence spectrum spreading demodulation module and a remote measuring data frame receiving and decoding module. The air vehicle measurement and control system has the advantages of being strong in anti-interference performance and anti-intercept performance and suitable for being used under complex electromagnetic environments.

Description

technical field [0001] The invention relates to a measurement and control system using different spreading systems for uplink and downlink, belonging to the field of aircraft measurement and control. Background technique [0002] Two traditional difficulties in aircraft measurement and control lie in weak signals and high dynamics. Because the volume of the aircraft limits the transmission power of the signal and the long-distance propagation energy attenuation, the signal energy reaching the ground receiver is very weak; and the high dynamics of the aircraft causes the signal reaching the ground receiver to produce Doppler effect. With the continuous development of electronic reconnaissance and countermeasure technology, the aircraft measurement and control system is facing the third difficulty: anti-jamming. At present, the civil aircraft measurement and control system in Europe and the United States and other countries adopts the direct sequence spread spectrum system to...

AI Technical Summary

Problems solved by technology

The defect of time division multiple access is that the time code slice allocated to each user is very short and intermittent, the amount of information sent each time is limited, and the information transmission rate is low; JTIDS allocates a guard time of about 2ms when dividing the time slot. Limit the range of the system to a range of 600 km

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