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Mobile communication sea area coverage system

A mobile communication and sea area technology, applied in the field of mobile communication sea area coverage system, can solve the problems of field strength attenuation, waves, etc.

Inactive Publication Date: 2010-07-14
泉州泽仕通科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two main reasons why the communication quality of the existing mobile communication is significantly reduced when the offshore transmission distance is greater than 40km. The interference between the electromagnetic wave and the original electromagnetic wave will cause the field strength to attenuate by about 20db; on the other hand, especially in the evening or morning, due to the interference of sunspots, the field strength of the electromagnetic wave will attenuate by about 20db

Method used

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  • Mobile communication sea area coverage system
  • Mobile communication sea area coverage system
  • Mobile communication sea area coverage system

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Embodiment Construction

[0013] refer to figure 1 , figure 2 and image 3 , the embodiment discloses a mobile communication sea area coverage system suitable for communication between mobile terminals on islands, operating ships, and artificial buildings with a distance of 35km to 120km from the coastline and land, which includes a near-end machine, a relay antenna, and a remote The input end of the near-end machine is connected to the signal source of the base station, the output end of the near-end machine is connected to the relay antenna, and the input and output ends of the far-end machine are respectively connected to the remote relay Antenna and retransmission antenna are connected. When the signal goes down, the output end of the near-end machine is connected to the relay antenna to transmit the compressed signal to the antenna system for signal transmission. It is located on islands, operating ships, and offshore artificial buildings. The end, that is, the remote machine receives the signa...

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Abstract

The invention provides a mobile communication sea area coverage system with low construction cost and good communication quality, which comprises a near-end machine, a relay antenna, a far-end machine, a far-end relay antenna and a repeat antenna, wherein the input end and the output end of the near-end machine are respectively connected with a base station and the relay antenna, and the input end and the output end of the far-end machine are respectively connected with the far-end relay antenna and the repeat antenna. The near-end machine and the far-end machine respectively compress and decompand a channel through a data companding module, and simultaneously adopt IF transmission to prevent the power attenuation caused by specular reflection of the sea level and sunspots, and the invention is suitable for the signal coverage of coastal water within 120km.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a mobile communication sea area coverage system, which is used for covering radio frequency signals to offshore ships or islands. Background technique [0002] When the frequency of mobile communication is between 800MHz and 7GHz, when the field strength coverage is carried out in this frequency band, since the radius of the earth is about 6400km, if the height of the transmitter tower on the seaside is assumed to be 120m, the distance between the top of the antenna and the sea level The distance between the tangent point and the transmission tower is about 40km. In actual use, the effective receiving distance of the mobile signal in the offshore is within 80km, and only the offshore range within 40km has good call quality. There are two main reasons why the communication quality of the existing mobile communication is significantly reduced when the offshore transmission dista...

Claims

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Application Information

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IPC IPC(8): H04W16/18H04W16/26
CPCY02D30/70
Inventor 林志华
Owner 泉州泽仕通科技有限公司
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