Short-wave data transmission device in interference environment, system and method

Abstract

The invention discloses a short-wave data transmission device in an interference environment, a system and a method thereof. The short-wave data transmission device comprises a main control module anda data transmission module communicatively connected with the main control module. The main control module is used for data receiving and sending, data checking and link management. The data transmission module is used for carrying out preprocessing before sending after unpacking the message content sent by the main control module in the data transmission process, and then sending the audio signal obtained by preprocessing before sending to the short-wave radio station. The pre-processing includes channel coding, narrowband signal modulation and digital-to-analog conversion. And is used for pre-processing the received audio signal after receiving in the data receiving process, and then sending the data group packet obtained by pre-processing after receiving to the main control module. Thepost-reception preprocessing includes analog-to-digital conversion, signal demodulation, and channel decoding. The invention can be applied to application scenarios where the transmission rate is notrequired to be high, and can stably maintain a low-rate data transmission under a strong interference environment.

Description

technical field [0001] The invention relates to a short-wave data transmission scheme in an interference environment, belonging to the technical field of short-wave communication. Background technique [0002] The interference of short-wave communication can be roughly divided into natural interference and man-made interference. Natural interference is mainly due to various environmental noises and interference caused by the relatively crowded short-wave channel. Man-made jamming is mainly divided into tracking jamming and broadband blocking jamming. Tracking jamming intercepts, sorts, and analyzes signals, and then guides the jamming transmitter to emit targeted jamming signals. The jamming signal energy is concentrated, and the jamming intensity is relatively large, which has the greatest impact on communication, but it needs to accurately intercept the communication frequency and direction. Broadband blocking interference uses high-power transmitters to block or pollute...

AI Technical Summary

Problems solved by technology

[0003] Currently commonly used short-wave anti-interference communication means include frequency hopping communication, spread spectrum communication and high-power communication, among which: frequency hopping communication can resist tracking interference; spread spectrum communication is effective for tracking interference and natural interference; high-power communication is effective for All of the above interferences are effective, but they are only used in large radio stations, and there are many limitations in actual use.

Proper use of the above-mentioned anti-jamming means can make the short-wave communication reach the transmission capability close to the normal environment, but at the same time, it also has the disadvantages that the applicable environment is limited and the existing short-wave radio stations do not necessarily support it.

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