Private network frequency-selecting networking chain building method based on short wave channel

Abstract

The invention is applicable to the technical field of short wave communication networks, and provides a private network frequency-selecting networking chain building method based on a short wave channel. The method comprises the following steps: a stable and reliable time synchronization system is built and a standard synchronous clock is provided via satellite timing equipment; all users in a subnet shares a common frequency set, and after start-up, the users synchronously scan the frequency set under the control of the synchronous clock; when in communication, a source user computes next time slot resident frequency of a target user, and initiates a call on the frequency; and after communication business between the source user and the target user is completed by building a chain therebetween, the frequency is released for the other users. According to the method provided by the invention, depending on the time synchronization system formed by Beidou or GPS, the source user computes the next time slot resident frequency of the target user, and then initiates the call on the frequency, so that frequency consistency between two communication parties is ensured, and channel quality is improved; waveform with a minimum format is used, so that utilization frequency is small, and time for building the short wave chain is short.

Description

technical field [0001] The invention belongs to the technical field of short-wave communication networks, and in particular relates to a method for building a chain by frequency-selective networking of a short-wave channel private network. Background technique [0002] Shortwave communication has the characteristics of flexible communication mode, strong invulnerability, low transmission power and simple equipment. After the on-site users complete the link building, they can send short messages, emails, code commands and other information through the private network collaborative data service process, and can also perform digital voice communication at a rate of 600bps through the private network collaborative voice service process. [0003] Due to the influence of signal conditions such as changes in the ionosphere, attenuation, and receiving distance, the traditional short-wave communication method has a low throughput rate, takes a long time to establish a short-wave link...

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Problems solved by technology

[0004] In view of the above problems, the purpose of the present invention is to provide a shortwave channel private network frequency selection network link building method, which aims to solve the problems of low pass rate of existing shortwave communication methods, long time for establishing shortwave links, and unstable channel quality. technical problem

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