short-wave communication semi-blind frequency selection system and frequency selection method based on CW signals

A technology of short-wave communication and frequency selection system, applied in wireless communication, transmission system, transmission monitoring and other directions, can solve the problems of low communication reliability and poor applicability, and achieve convenient and fast construction, simple equipment, reliability and real-time improvement. Effect

Active Publication Date: 2019-05-28
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0005] In order to solve the above technical problems, the present invention provides a semi-blind frequency selection system and frequency selection method for short-wave communication based on CW signals, which realizes the integration of detection and com

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  • short-wave communication semi-blind frequency selection system and frequency selection method based on CW signals
  • short-wave communication semi-blind frequency selection system and frequency selection method based on CW signals
  • short-wave communication semi-blind frequency selection system and frequency selection method based on CW signals

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Embodiment Construction

[0047]In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will be described in detail in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the invention.

[0048] This embodiment provides a semi-blind frequency selection system for shortwave communication based on CW signals. Please refer to figure 1 As shown, it includes a short-wave radio station, a short-wave broadband receiver and a signal processing module. The short-wave radio station and the short-wave broadband receiver share the antenna through an antenna sharer. The signal processing module includes a multi-channel processing unit, a passive spectrum monitoring unit and a CW communication detection frequency optimization unit, wherein the multi-channel processing unit is...

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Abstract

The invention discloses a short wave communication semi-blind frequency selection system and frequency selection method based on a CW signal. Passive perception of short-wave full-band interference energy is realized based on a broadband digital multi-channel technology; An energy threshold value is set by using a dial indicator method to judge the interference energy of each sub-channel so as toscreen a prior frequency; A basis is provided for bidirectional detection of high-frequency CW communication; The prior frequency is actively detected based on the short-wave radio station; the priorifrequency is further selected according to a bidirectional detection result to screen out an optimal communication frequency; Therefore, real-time and reliable communication frequency can be providedfor a complex and changeable short-wave communication environment, reliability and real-time performance are improved to a certain extent, meanwhile, equipment is simple, construction is convenient and rapid, and the method has important significance for development and application of a short-wave communication self-adaptive frequency selection technology.

Description

technical field [0001] The invention relates to the technical field of shortwave communication frequency prediction, and more specifically, to a semi-blind frequency selection system and method for shortwave communication based on CW signals. Background technique [0002] Short-wave communication refers to a radio communication method with a frequency of 3-30MHz, also known as high-frequency communication. In order to make full use of the short-wave transmission characteristics, the frequency range in practical application of communication is 1.5-30MHz. Short-wave communication equipment is simple, low-cost, and easy to set up. At the same time, short-wave communication mainly relies on sky-wave propagation, which is strong invulnerability, unaffected by ground terrain, does not need relays and forwarding, and is not restricted by active relays and network hubs. The transmission power is small and the communication method is flexible. The sky wave can realize the communicati...

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Application Information

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IPC IPC(8): H04B17/382H04B17/345H04W72/08H04W72/04
Inventor 李国军乔金亮叶昌荣田飞翔张德平马欢郑光发李景慧
Owner CHONGQING UNIV OF POSTS & TELECOMM
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