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Digital frequency shift companding system

A technology of digital frequency shifting and digital intermediate frequency, which is applied in radio relay system, advanced technology, network planning, etc., can solve problems such as poor communication conditions and shortage of urban communication frequency resources, and achieve increased reliability, increased power capacity, and reduced volume effect

Inactive Publication Date: 2011-04-27
NTS TECH CHENGDU
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a digital frequency shift companding system to solve the problems of poor communication conditions in remote mountainous areas and shortage of urban communication frequency resources

Method used

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Embodiment 1

[0027] Such as Figures 1 to 4 As shown, the present invention includes a near-end machine connected to a base station through a coupler, a remote machine, and an operation and maintenance center. Both the near-end machine and the remote machine are connected with a relay antenna, and the remote machine is also connected with a retransmission The antenna, the near-end unit and the far-end unit are respectively connected to the operation and maintenance center.

[0028] The near-end machine includes the first clock unit, the first control unit, the first power supply unit, the first lightning protection unit, and the first monitoring unit, which are respectively connected to the first radio frequency duplex unit and the first power amplifier low-noise amplifier through the bus. unit, the first transceiver radio frequency unit, the first digital intermediate frequency unit, the first digital processing unit, the second digital intermediate frequency unit, the second transceiver ...

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Abstract

The invention discloses a digital frequency shift companding system, which comprises a local machine, a remote machine and an operation maintenance center, wherein the local machine is connected with a base station through a coupler; the local machine and the remote machine are connected with relay antennae and are connected with each other through transmission signals of the relay antennae; the remote machine is also connected with a retransmission antenna; and the local machine and the remote machine are connected with the operation maintenance center. The problems of signal coverage of complex terrains such as remote and mountain areas, hilly grounds, deserts, grasslands, large rivers, railway lines, forests and the like as well as coverage areas with tense urban frequency resources are solved effectively; a high-efficiency compact design is adopted, so that integration degree and overall efficiency are improved in a certain degree and size is further reduced; power capability is enhanced; simultaneously, cost is lowered and reliability is enhanced.

Description

technical field [0001] The invention relates to a companding system in a wireless communication network, in particular to a digital frequency shifting companding system. Background technique [0002] The demand for mobile communication in remote areas is increasing day by day. Due to the constraints of geographical and economic conditions in these areas, the communication status is poor. If the original repeater method or general frequency shift method is used for network construction, there will be excessive initial investment costs. High, resulting in a long time to recover the investment, or even impossible to recover, and remote areas are far away from towns and cities, and cannot receive base station signals from towns at all. If the original frequency signal of the base station is used, it is easily affected by the external environment, and the wireless propagation path The loss is large, and the mountainous terrain is complex, and the signal is easily blocked. Conte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/26H04B7/14
CPCY02D30/70
Inventor 宋敏王斌
Owner NTS TECH CHENGDU
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