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Diversity reception method and system based on soft value combining in shortwave access network

A diversity reception and access network technology, applied in diversity/multi-antenna systems, transmission systems, space transmission diversity, etc., can solve the problem of high bit error rate of signal reception, achieve strong scalability, simple implementation, and improve the quality of short-wave communication Effect

Active Publication Date: 2018-07-03
中国人民解放军国防信息学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above problems, the purpose of the present invention is to provide a diversity receiving method and system based on soft value combining in a shortwave access network, aiming to solve the technical problem of high error rate of signal reception in the existing point-to-point shortwave access mode

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  • Diversity reception method and system based on soft value combining in shortwave access network
  • Diversity reception method and system based on soft value combining in shortwave access network
  • Diversity reception method and system based on soft value combining in shortwave access network

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Embodiment 1

[0033] figure 1 It shows the flow of the diversity reception method based on soft value combining in the HF access network provided by the embodiment of the present invention, and only shows the part related to the embodiment of the present invention for the convenience of description.

[0034] Step S101, the remote user interacts with a fixed station in the shortwave access network through asynchronous or synchronous mode to complete link establishment and network access. After the link is established, the working frequency between the remote user and the fixed station for f.

[0035] The remote user performs handshake interaction with a fixed station in the shortwave access network through asynchronous mode (such as navigation tone mode) or synchronous mode (such as US military 3G mode), establishes a link and joins the network. After the link is established, the remote user and the fixed station work on the determined working frequency f.

[0036] Step S102, the fixed sta...

Embodiment 2

[0054] Figure 6 A structural diagram of a diversity receiving system based on soft value combining in a shortwave access network provided by an embodiment of the present invention is shown, and only parts related to the embodiment of the present invention are shown for convenience of description.

[0055] The shortwave access network provided by this embodiment is based on the diversity receiving system based on soft value combining, including a remote user 1 and a shortwave access network 2, and the shortwave access network 2 includes a control center 21 and fixed stations distributed in different regions 22. There are 3 fixed stations in the figure. The fixed stations 22 are connected through a wired network and connected to the control center 21, and the fixed stations 22 are used to realize wireless access of remote users and complete the conversion from wireless to wired;

[0056] Wherein said remote user 1 includes:

[0057] The link building and network access module...

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Abstract

The invention is suitable for the technical field of short wave communication and provides a diversity receiving method and system, based on soft value merging, of a short wave access network. The method comprises the steps that: a far end user carries out interaction with one fixed station of the short wave access network so as to complete link establishment and network access; the fixed station sends a work frequency f to a control center; the control center selects other N-1 fixed stations in the short wave access network according to a path number N of signals to be received and set the work frequency to be f, and when signals required to be sent, the N fixed stations receive and process the signals and output N paths of base band discrete sampling signals; and finally, the control center or the fixed stations carry out combined processing on the N paths of base band discrete sampling signals so as to obtain initial sent signals of the far end user. According to the invention, diversity receiving is adopted in the short wave access network, the advantages of access network in the aspect of multi-path transmission providing is fully explored, a diversity receiving effect is achieved, and the quality of short wave communication is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of shortwave communication, and in particular relates to a diversity receiving method and system based on soft value combining of a shortwave access network. Background technique [0002] Short-wave communication mainly relies on ionospheric reflection for propagation, and can realize long-distance communication without relays. It has the characteristics of strong mobility, fast network reconstruction, and strong invulnerability. It is widely used in military, ocean, fishery, disaster relief, meteorology, and diplomacy. and other fields. At the same time, it is also an important means of emergency and guaranteed communication. [0003] The ionosphere itself is a time-varying transmission medium, and there are complex factors such as multipath interference, time-selective fading, and Doppler frequency shift, which make traditional point-to-point short-wave communication unable to obtain good communication qu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/22H04B7/08
CPCH04B7/0837H04B7/22
Inventor 徐坤付国宾胡佳郭马坤
Owner 中国人民解放军国防信息学院