Self-adaptive distance data transmission method for aircraft-mounted terminal

Abstract

The invention provides a self-adaptive distance data transmission method for an aircraft-mounted terminal and aims to provide a data transmission method capable of improving transmission link utilization rate and data transmission efficiency and also provides a self-adaptive implementation method for the data transmission between the aircraft-mounted terminal and a data transmission receiver. The self-adaptive distance data transmission method is realized through the following technical scheme: an aircraft inertial navigation system provides inertial navigation data for the aircraft-mounted terminal in real time through a serial port, a link margin estimator of the aircraft-mounted terminal calculates the distance between an aircraft and the data transmission receiver in real time according to the inertial navigation data and works out the system margin of the data transmission link according to the stored data transmission receiver relevant parameters, the data transmission link parameters and the parameters such as the EIRP (effective isotropic radiated power) value of the antenna of the aircraft-mounted terminal, the aircraft-mounted terminal automatically selects data transmission speed, carries out coded modulation on data in different data transmission speeds through an encoder and a modulator, and transmits the data to the data transmission receiver after up-conversion and amplification processing.

Description

technical field [0001] The invention relates to the field of measurement and control communication, and provides an adaptive realization method for the data transmission of aircraft-borne terminals. Background technique [0002] In the field of measurement and control communication, data transmission is one of the important working modes of the system. During the flight of the aircraft, various sensors configured on the aircraft platform need to obtain data through a wireless data transmission communication link, and transmit it to the ground receiving system in real time. The data transmission communication link The road is mainly composed of an aircraft-borne terminal and a ground data transmission receiver. The aircraft-borne terminal modulates the data acquired by the aircraft-borne sensor to the transmitting carrier, and through the wireless transmission channel, the ground data transmission receiver receives and demodulates the output in real time. [0003] Since the p...

AI Technical Summary

Problems solved by technology

Usually, the parameter indicators of aircraft-borne terminal equipment and digital transmission receivers, such as the radiated power EIRP value of aircraft-borne terminal equipment, the ratio of antenna gain to noise temperature G / T value of digital transmission receivers, and the data transmission rate value supported by equipment, are based on Designed for the longest distance, it can meet the data transmission rate requirements when the aircraft is at the farthest distance from the digital transmission receiver. This kind of fixed data transmission rate, the aircraft flies in different positions, and the link transmission system margin is different. Yes, the system link margin is relatively large during short-distance transmission, and the system link margin is small during long-distance transmission. The data transmission link margin is not fully utilized, and the transmission channel efficiency is low

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