Onboard high-speed communication system based on OFDM technique

Abstract

The invention relates to an onboard high-speed communication system based on an OFDM technique, which comprises a transmitting end consisting of an uplink data main control module, an uplink baseband processing module, an up-conversion module and a signal transmitting module, and a receiving end consisting of a down-conversion module, a downlink baseband processing module, a downlink data main control module and a signal receiving module. At the transmitting end, the uplink data main control module is connected with the uplink baseband processing module and an external onboard communication transmitting terminal respectively, the uplink baseband processing module is connected with the up-conversion module, and the up-conversion module is connected with the signal transmitting module. At the receiving end, the signal receiving module is connected with the down-conversion module, the down-conversion module is connected with the downlink baseband processing module, and the downlink baseband processing module is connected with the downlink data main control module. The onboard high-speed communication system can effectively improve the communication quality and the speed, and has the excellent effect of achieving long-distance high-speed aeronautical communication under the conditions of large Doppler frequency shift change rate and multi-diameter.

Description

technical field [0001] The invention belongs to the technical field of information communication, and relates to an airborne high-speed communication system based on OFDM technology. Background technique [0002] Due to the increasingly complex communication environment and objects, modern aviation communication requires higher and higher data transmission rates, not only to support the transmission of traditional voice and control information, but also to support the transmission of real-time image data. Especially driven by the application and development of UAVs, aviation data link technology is developing in the direction of high speed, real-time, reliability and networking. Based on the urgent needs of the development of the aviation field, it is of great significance to develop a high-speed, high-reliability aviation communication system. [0003] The existing airborne communication system mainly adopts analog frequency modulation, single-carrier digital communication...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects of the existing airborne communication system in terms of communication capability, coverage and communication quality, and to solve the problem of the communication quality of the existing airborne communication system in the Doppler frequency shift change rate and multipath environment. Not high, the system has poor anti-fading performance, the reliability is not strong, and the communication rate is low. An airborne high-speed communication system based on OFDM technology is proposed.

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