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Multimode digital DAS supporting multi-information-source access

A multi-source, digital technology, applied in wireless communication, electrical components, etc., can solve problems such as high equipment cost and difficult construction, and achieve the effect of reducing construction difficulty and system cost

Active Publication Date: 2013-10-30
SUNWAVE COMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This brings a series of problems such as construction difficulties and high equipment costs.

Method used

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  • Multimode digital DAS supporting multi-information-source access
  • Multimode digital DAS supporting multi-information-source access
  • Multimode digital DAS supporting multi-information-source access

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Embodiment Construction

[0024] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0025] figure 1 It is the topological structure diagram of the present invention. Among them, AU1 serves as the master near-end access unit AU, and AU2 and AU3 serve as slave near-end access units AU. AU2 and AU3 respectively couple radio frequency signals from different base stations, and after digital processing, transmit them from the optical fiber to the main near-end access unit AU, form a frame together with the signal received by the main near-end access unit AU, and then transmit to the extension unit EU via optical fiber , the main near-end access unit AU can connect up to 4 EU devices.

[0026] The main function of the extension unit EU is the expansion of the optical port and the access of Gigabit Ethernet. Each expansion unit EU device can be conne...

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Abstract

The invention relates to a multimode digital DAS supporting multi-information-source access. A near-end optical fiber transmission link is connected with a near-end FPGA, the near-end FPGA is respectively connected with a near-end analog-to-digital conversion chip and a near-end digital-to-analog conversion chip, the near-end analog-to-digital conversion chip is connected with the downlink portion of a near-end radio frequency link, the near-end digital-to-analog conversion chip is connected with the uplink portion of the near-end radio frequency link, and the downlink portion of the near-end radio frequency link and the uplink portion of the near-end radio frequency link are respectively connected with a duplexer. The multimode digital DAS has the advantages that when the aim that multi-standard type signals are covered at the same time, and different-standard type base stations are positioned in different sites is required to be achieved, an auxiliary AU is placed, the multi-standard type signals are combined together according to the mode, the multi-standard type signals are transmitted to the same RU, the RU outputs the signals, and signal coverage is carried out by means of a set of antenna feed system after the signals are coupled through a POI, so that a user just needs one set of system to achieve the simultaneous coverage of the multi-standard type signals, and the system cost and the construction difficulty of the system are reduced.

Description

technical field [0001] The invention relates to the field of mobile communication coverage, in particular to a multi-mode digital DAS system supporting multi-source access. Background technique [0002] The existing indoor mobile communication environment has too many areas that need to be improved: [0003] In terms of coverage, due to the shielding and absorption of the building itself, a large transmission loss of radio waves is caused, forming a weak field strength area or even a blind area of ​​the mobile signal; in terms of capacity, buildings such as large shopping malls and conference centers, due to mobile The density of telephone use is too high, the local network capacity cannot meet the needs of users, and wireless channel congestion occurs; in terms of quality, radio frequency interference is very likely to exist in the high-rise space of buildings, the service cell signal is unstable, and ping-pong switching effects occur, and the voice quality is difficult to ...

Claims

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Application Information

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IPC IPC(8): H04W88/10
Inventor 陈青松吴志坚李鑫
Owner SUNWAVE COMM
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