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Diversity reception method and system based on hard value decision in shortwave access network

A technology of diversity reception and access network, applied in the direction of diversity/multi-antenna system, location diversity, etc., can solve the problem of high bit error rate of signal reception, and achieve the effects of strong scalability, simple implementation, and low implementation cost

Active Publication Date: 2017-01-18
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 hard value judgment in a shortwave access network, aiming to solve the technical problem of high bit 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 hard value decision in shortwave access network
  • Diversity reception method and system based on hard value decision in shortwave access network
  • Diversity reception method and system based on hard value decision in shortwave access network

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Embodiment 1

[0032] figure 1 It shows the flow of the diversity receiving method based on the hard value decision 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.

[0033] 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.

[0034] 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.

[0035] Step S102, the fixed ...

Embodiment 2

[0053] Figure 6 It shows the structural diagram of the diversity receiving system based on the hard value decision of the shortwave 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.

[0054] The shortwave access network diversity receiving system based on hard value judgment provided by this embodiment includes 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;

[0055] Wherein said remote user 1 includes:

[0056] The link building and network access module is us...

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Abstract

The invention provides a hard-decision-based diversity reception method and system for a short-wave access network, which is suitable for the field of short-wave communication. The hard-decision-based diversity reception method comprises the steps: a remote-end user and a constant station of the short-wave access network perform interaction to complete link establishment and network access; the constant station sends operating frequency f to a control center; the control center, according to the quantity N of paths needing of receiving signals, selects other N-1 constant stations of the short-wave access network and sets the operating frequency to be f, and when the signals need to be sent, the remote-end user sends the signals, and the constant station performs processing and decision and collects verification results into the control center; finally, the control center selects any one path of verification-passing decoded signals as the final signals to be output, and if the verification of the all constant stations is failed, signal reception is judged to be failed. According to the hard-decision-based diversity reception method and system for the short-wave access network, which are provided by the invention, the application of diversity reception in the short-wave access network is achieved, an advantage of an access network on provision of multi-path transmission is fully developed, a diversity reception 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 hard value judgment 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 qua...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/02
CPCH04B7/024
Inventor 徐坤付国宾王骁勇陈卫东
Owner 中国人民解放军国防信息学院