A Radio Distance Measuring System in Aviation Wireless Communication System

Abstract

The invention discloses a radio distance measuring system of an aerial radio communication system. A distance measuring initiating device times independently, and distance measuring commands are periodically emitted in a distance measuring message and service information fusion module through an up link; an up link distance measuring command identifying module of a distance measuring respond device effectively identifies distance measuring command information based on service information synchronization and outputs identification pulse information; a respond command generation module combines the identification pulse information with the local framing state to generate a distance measuring respond command which includes respond enabling and processing delay; the distance measuring message and service information fusion module processes the distance measuring respond command to form a special distance measuring message, and the special distance measuring message is emitted through a down link; a down link distance measuring message analyzing module processes the distance measuring message emitted from the distance measuring respond device based on the service information synchronization, and a distance calculating filter module combines with the machine state to finish the distance measuring information calculation and filter and outputs the information of distance between devices.

Description

technical field [0001] The invention relates to the field of aerospace wireless communication, in particular to a wireless communication distance measuring device in an aerospace vehicle. [0002] technical background [0003] Radio ranging is one of the key functional modules in the aerospace communication system. The transmitting and receiving parties of the communication link can accurately estimate the link attenuation according to the distance information, and realize power control. On the other hand, through the comprehensive calculation of distance measurement information, angle measurement information and height measurement information, the positioning information of the aircraft (space) can be obtained. This active positioning information has little dependence on the external environment, and is an important positioning method other than GPS. [0004] The traditional radio ranging technology is mainly divided into side tone ranging technology and pseudo code rangin...

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Problems solved by technology

However, the pseudo-code information forwarded by this method cannot avoid the primary interference of the electromagnetic environment, which reduces the forwarding sensitivity and may cause the system of the secondary receiving link to lose lock; the uplink and downlink links of the forwarding ranging system need to be related, and the system parameters need to be detailed. design, the complexity is greatly increased; on the other hand, the pseudocode sequence used for ranging needs to be orthogonal to the synchronization sequence of the data frame, which requires an additional receiving channel and occupies spectrum resources

[0007] All in all, there is a certain conflict between the above two ranging technology systems and the channel resources, software and hardware resources adopted by the established aerospace communication system, which makes it difficult for the mature communication system to add ranging functions to the system with a small modification cost. Therefore, it is necessary to design A radio ranging method based on channel sharing, which minimizes the additional resource consumption caused by system upgrades

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