Multi-mode digital remote radio system

A digital radio remote and remote technology, applied in transmission systems, radio transmission systems, network planning and other directions, can solve problems such as the unfavorable promotion and application of multi-mode digital radio remote systems, and achieve good market prospects and flexible networking. The effect of convenience and saving fiber resources

Active Publication Date: 2011-12-21
COMBA TELECOM SYST CHINA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to realize the multi-mode digital radio remote system, through the description of the working process of the communication network of different standards above, a defect can be found, that is, when the GSM base station and the TD-RRU are not in the same place, and there is no optical fiber resource between the two places If it is connected, this will bring great limitations to the application of the multi-mode digital remote radio system, which is very unfavorable for the promotion and application of the multi-mode digital remote radio system

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment 1

[0018] Taking the multi-mode digital radio remote system of GSM+TD+WLAN as an example, the multi-mode digital radio remote system of the present invention includes a GSM repeater, a TD repeater, a remote covering machine, and a baseband router.

[0019] Such as figure 2 Shown is the block diagram of the hardware digital module of the baseband router. The baseband router includes FPGA chip, CPU, power supply POWER, two optical ports OP1 and OP2 respectively connected with the near-end repeater, two TLK1501 (serializer / deserializer) Adapter), a TLK4015 (serializer / deserializer), four optical ports OP1', OP2', OP3' and OP4' respectively connected to different remote coverage machines. Taking the downlink signal transmission direction of the baseband router as an example, OP1 and OP2 realize the serial / parallel conversion of the signal through TLK1501 and send the signal to the FPGA chip. The FPGA chip realizes the parallel / serial signal through the TLK4015 after the signal is merged...

Embodiment 2

[0043] As a preferred embodiment, the remote coverage machine may also include a CFR (Crest Factor Reduction, crest factor reduction) module, a DPD (Digital Pre-Distortion, digital pre-distortion) module, a feedback down-conversion module, and a feedback A / D converter , The CFR module is connected to the digital up-conversion channel and the DPD module, the DPD module is also connected to the D / A converter, the feedback down-conversion module is connected to the downlink power amplifier and the feedback A / D converter, and the feedback A / D The converter is also connected to the DPD module, as shown in Figure 6.

[0044] Taking the GSM channel as an example, when the baseband signal is up-converted to an intermediate frequency digital signal through the digital up-conversion channel 451, the CFR module 452 uses the peak-elimination technology to perform peak elimination processing on the signal, and then the DPD module 453 receives the signal sent in the CFR and combines Use DPD te...

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Abstract

Disclosed is a multimode digital radio-frequency remote system. The system comprises at least one remote covering machine, a baseband router and a plurality of local relays. The remote covering machine is connected with the baseband router, and the baseband router is connected with all the local relays respectively. The baseband router is used for receiving signals of different modes from the local relays, and sending the combined signals to the remote covering machine; and receiving signals from the remote covering machine, and sending the split signals respectively to the local relays of the corresponding modes. The present invention solves the problem that the application of the multimode digital radio-frequency remote system is restricted under the conditions that the local relays of different modes are not in the same place and no optical fiber is connected between the relays, so that the application restriction of the multimode digital radio-frequency remote system is alleviated, and the flexible application of the multimode digital radio-frequency remote system is realized. Moreover, through the present invention, a lot of optical fiber resources are saved, the networking is convenient, and the market prospect is better.

Description

Technical field [0001] The invention relates to the field of digital repeater system design, in particular to a multi-mode digital radio frequency remote system. Background technique [0002] In the mobile communication network, the digital radio remote system, as an extension and supplement of the base station in the coverage network, can improve signal quality, solve the problem of dropped calls in weak signal areas and blind areas, and has increasingly become a major part of mobile communication network coverage. At this stage, 2G and 3G networks in mobile communication networks will coexist for a long time. Mobile operators currently have TD licenses for 3G networks and 2G networks that have been operating. In addition to the increasingly widely used WLAN networks, they also have 2G, 3G and WLAN transmissions. The multi-mode digital radio remote system will save a lot of costs for operators in the multi-network construction, and will also bring great convenience to the multi-...

Claims

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Application Information

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IPC IPC(8): H04W16/26H04W88/10H04W88/14
CPCH04W84/047H04B7/155H04W88/085H04W88/10
Inventor 叶祖铨陈春海黄伯宁伍尚坤李龙芳
Owner COMBA TELECOM SYST CHINA LTD
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