CN202565279U

CN202565279U - Remote terminal for fiber far-pulling type wireless distribution system

Info

Publication number: CN202565279U
Application number: CN2012201849591U
Authority: CN
Inventors: 杨建明
Original assignee: BEIJING HANMING COMMUNICATION Co Ltd
Current assignee: Wellhead Stone Technology Corp
Priority date: 2012-04-27
Filing date: 2012-04-27
Publication date: 2012-11-28
Anticipated expiration: 2022-04-27

Abstract

Disclosed is a remote terminal for a fiber far-pulling type wireless distribution system, comprising an optical interface, a digital signal processing module, an A/D and D/A transition module, a frequency conversion module, an RF amplification module, and a path-combining module, wherein the optical interface is used for realizing the optical transmit-receive processing of the digital signals of different systems; the digital signal processing module is used for carrying out digital signal separation and path combination; the A/D and D/A transition module is used for carrying out digital-analog and analog-to-digital conversion over the uplink signals and the downlink signals respectively; the frequency conversion module is used for restoring the analog intermediate frequency signals into the downlink signals of the actual downlink working frequency and transforming the uplink signals from the RF amplification module into the analog intermediate frequency signals; the RF amplification module is used for carrying out signal amplification processing; and the path-combining module is used for carrying out signal path-combining processing. The remote terminal of the utility model can simultaneously support the wireless communication network of multiple standards and effectively solve the problems of repeated construction of covering networks of the service providers and inter-network interference.

Description

Remote machine for optical fiber remote wireless distribution system

Technical Field

The utility model relates to the field of communication technology, more specifically say, relate to a remote machine for optic fibre formula wireless distribution system that zooms out.

Background

As the Mobile communication network in China has been developed rapidly for many years, at present, three operators have invested in 2G and 3G networks of Multiple systems including Code Division Multiple Access (CDMA), Global System for Mobile communications (GSM), Distributed Control System (DCS), CDMA (Code Division Multiple Access 2000), Wideband Code Division Multiple Access (WCDMA), Time Division-Synchronous Code Division Multiple Access (TD-SCDMA), and in the future, 4G networks of Multiple lte (long Term evolution) systems will also be put into commercial use. With the continuous development of mobile communication networks, the problems of network construction difficulty, quality and repeated construction must be brought in the network construction of operators by applying the traditional single-system coverage equipment, and particularly, the problems of repeated construction, inter-network interference and the like brought by respectively constructing own coverage systems in each operation in the same coverage scene are more and more prominent.

However, most of the far-end power units of the optical fiber remote wireless coverage devices widely used in various coverage networks are single-system or dual-system devices, and can only support one to two different network systems at most, and to realize simultaneous coverage of multiple network wireless signals, the devices of multiple different systems can only be combined at the output end of the device by means of a Point of Interest (POI) platform, but due to the reasons of complex internal structure, multiple components, large volume, high insertion loss and the like of the POI, problems may be caused in practical application.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, provide a can support a plurality of standard wireless communication networks's a far-end machine that is used for optic fibre formula wireless distribution system that zooms out simultaneously.

The utility model provides a technical scheme that its technical problem adopted is:

the remote machine for the optical fiber remote wireless distribution system is constructed and comprises an optical interface, a digital signal processing module, an A/D and D/A conversion module, a frequency conversion module, a radio frequency amplification module and a combining module which are sequentially in communication connection; wherein,

the optical interface is used for connecting an optical module and the digital signal processing module and realizing optical transceiving processing of digital signals of different systems;

the digital signal processing module is used for separating the digital signals of different systems, sending the digital signals to the A/D and D/A conversion modules, combining the digital intermediate frequency signals from the A/D and D/A conversion modules and sending the combined digital intermediate frequency signals to the optical interface;

the A/D and D/A conversion module is used for converting the separated digital intermediate frequency signals into analog intermediate frequency signals and converting the analog intermediate frequency signals from the frequency conversion module into digital intermediate frequency signals;

the frequency conversion module is used for reducing the analog intermediate frequency signal into a downlink signal of an actual downlink working frequency and converting an uplink signal from the radio frequency amplification module into an analog intermediate frequency signal;

the radio frequency amplification module is used for performing bidirectional amplification processing on the downlink signal from the frequency conversion module and the uplink signal from the combiner module;

the combining module is used for receiving and transmitting a plurality of downlink signals with different frequencies after combining the downlink signals, and sending uplink signals with different frequencies received by the radio frequency port to the radio frequency amplifying module after separating the uplink signals with different frequencies.

Remote machine, wherein, the combination module includes:

the uplink combiner is used for separating uplink signals with different frequencies received by the radio frequency port and then sending the uplink signals to the radio frequency amplification module;

the downlink combiner is used for receiving and transmitting a plurality of downlink signals with different frequencies through the radio frequency port after combining the downlink signals;

and the electric bridge is used for respectively combining the uplink signals and the downlink signals from the uplink combiner and the downlink combiner and distributing the combined signals to the two radio frequency ports for receiving and transmitting.

The remote machine of the present invention, wherein the radio frequency amplification module includes a downlink radio frequency module and an uplink radio frequency module: wherein,

the downlink radio frequency module comprises a plurality of paths of downlink power amplifiers for amplifying downlink signals from the frequency conversion module and a group of TD-SCDMA radio frequency units;

the uplink radio frequency module comprises a plurality of paths of uplink low noise amplifiers for amplifying the uplink signals from the combining module and an AP unit for receiving and transmitting WLAN signals.

The remote terminal of the utility model, wherein the multi-path downlink power amplifier comprises a GSM power amplifier, a DCS power amplifier, a CDMA power amplifier and a WCDMA power amplifier;

the multi-path uplink low noise amplifier comprises a GSM low noise amplifier, a DCS low noise amplifier, a CDMA low noise amplifier and a WCDMA low noise amplifier.

The utility model discloses a remote machine, wherein, the frequency conversion module includes the up-conversion unit that is used for reducing the simulation intermediate frequency signal to the downlink signal of actual downlink operating frequency;

and the down-conversion unit is used for converting the uplink signal from the radio frequency amplification module into an analog intermediate frequency signal.

The remote machine, wherein, AD and DA conversion module are including the number/analog conversion unit that is used for accomplishing digital-to-analog conversion and the analog-to-digital conversion unit that is used for accomplishing analog-to-digital conversion.

Remote machine, wherein, go upward combiner working frequency channel and include: a CDMA frequency band of 870-880 MHz, a GSM frequency band of 935-960 MHz, a DCS frequency band of 1805-1850 MHz, a TD-SCDMA frequency band of 1880-1920 MHz and 2010-2025 MHz, and a WCDMA frequency band of 2130-2145 MHz.

Remote machine, wherein, downlink combiner working frequency channel includes: a CDMA frequency band of 825-835 MHz; 890-915 MHz GSM frequency band; a DCS frequency band of 1710-1755 MHz; 1940-1955 MHz WCDMA frequency band; 2400-2483.5M Hz WLAN frequency band.

The beneficial effects of the utility model reside in that: the digital signal processing module, the A/D and D/A conversion module, the frequency conversion module, the radio frequency amplification module and the combining module which can simultaneously process the digital signals of different frequency bands of different systems are arranged in the remote terminal, so that the remote terminal can simultaneously support a plurality of wireless communication networks including CDMA, GSM, DCS, WCDMA, TD-SCDMA and WLAN, the wireless signal coverage of a plurality of communication networks can be realized through one-time construction, and the problems of repeated construction of operator coverage networks and inter-network interference can be effectively solved. And simultaneously, the utility model discloses a digital signal processing is all carried out with down signal to the last signal of going in every system to the remote terminal, has effectively guaranteed the isolation between each system, has reduced intersystem signal interference.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

fig. 1 is a schematic diagram illustrating a first remote unit of a remote optical fiber remote wireless distribution system according to a preferred embodiment of the present invention;

fig. 2 is a schematic diagram of a remote unit for an optical fiber remote wireless distribution system according to a preferred embodiment of the present invention.

Detailed Description

The utility model discloses a far-end machine functional block diagram for optic fibre formula wireless distribution system that zooms out is shown in fig. 1, including communication connection's optical interface 10, digital signal processing module 20, AD and DA conversion module 30, frequency conversion module 40, radio frequency amplification module 50 and combiner module 60 in order. The optical interface 10 is used for connecting the optical module and the digital signal processing module 20, and implementing optical transceiving processing of digital signals of different systems; the digital signal processing module 20 is configured to separate digital signals of different systems and send the digital signals to the a/D and D/a conversion module 30, combine digital intermediate frequency signals from the a/D and D/a conversion module 30, and send the combined digital intermediate frequency signals to the optical interface 10; an a/D and D/a converting module 30 for converting the separated digital intermediate frequency signal into an analog intermediate frequency signal and converting the analog intermediate frequency signal from the frequency converting module 40 into a digital intermediate frequency signal; the frequency conversion module 40 is configured to restore the analog intermediate frequency signal to a downlink signal of an actual downlink operating frequency, and convert the uplink signal from the radio frequency amplification module 50 to an analog intermediate frequency signal; the radio frequency amplification module 50 is configured to perform bidirectional amplification processing on the downlink signal from the frequency conversion module 40 and the uplink signal from the combiner module 60; the combining module 60 is configured to combine a plurality of downlink signals with different frequencies, transmit and receive the combined downlink signals through the radio frequency port, separate uplink signals with different frequencies received by the radio frequency port, and transmit the separated uplink signals to the radio frequency amplifying module 50.

The different systems refer to wireless communication network systems of multiple systems including CDMA, GSM, DCS, WCDMA, TD-SCDMA, and WLAN, and digital signals of the different systems are distinguished according to different frequency bands. The optical interface 10, the digital signal processing module 20, the a/D and D/a conversion module 30, the frequency conversion module 40, the radio frequency amplification module 50 and the combining module 60 can simultaneously process digital signals of different frequency bands of different systems, so that the remote end function of the embodiment can simultaneously support wireless communication networks of multiple systems including CDMA, GSM, DCS, WCDMA, TD-SCDMA and WLAN, wireless signal coverage of multiple communication networks can be realized through one construction, and the problems of repeated network construction and inter-network interference of operators can be effectively solved. Meanwhile, the remote machine of the embodiment performs digital signal processing on the uplink signal and the downlink signal in each system, thereby effectively ensuring the isolation between the systems and reducing the signal interference between the systems.

Further, as shown in fig. 2, the combining module 60 in the remote terminal includes an uplink combiner 62, a downlink combiner 61, and a bridge 63. The uplink combiner 62 is configured to separate uplink signals with different frequencies received by the radio frequency port and send the separated uplink signals to the radio frequency amplification module 50, and the downlink combiner 61 is configured to combine downlink signals with different frequencies and send and receive the combined downlink signals through the radio frequency port; the electric bridge 63 is configured to combine the uplink signal and the downlink signal from the uplink combiner 62 and the downlink combiner 61, and distribute the combined signals to two radio frequency ports for transceiving. Because the TD-SCDMA and the WLAN are time division duplex systems, and the uplink and the downlink work in the same frequency range, when combining with other systems, the uplink and the downlink signals of the TD-SCDMA system are combined by the downlink combiner 61, and the uplink and the downlink signals of the WLAN system are combined by the uplink combiner 62. The combiner of upper and lower disconnect-type is adopted like this to combine at the end through electric bridge 63, output radio frequency port adopts two antenna interface forms, can effectively reduce the combiner design degree of difficulty, reduces the equipment volume, reduces the insertion loss of terminal passive device, improves the power amplifier utilization ratio, optimizes the system and goes upward noise figure.

The working frequency band of the uplink combiner 62 includes: a CDMA frequency band of 870-880 MHz, a GSM frequency band of 935-960 MHz, a DCS frequency band of 1805-1850 MHz, a TD-SCDMA frequency band of 1880-1920 MHz and 2010-2025 MHz, and a WCDMA frequency band of 2130-2145 MHz. The operating frequency band of the downstream combiner 61 includes: a CDMA frequency band of 825-835 MHz; 890-915 MHz GSM frequency band; a DCS frequency band of 1710-1755 MHz; 1940-1955 MHz WCDMA frequency band; 2400-2483.5M Hz WLAN frequency band. So as to realize the combination and separation processing of signals from wireless communication networks of a plurality of modes including CDMA, GSM, DCS, WCDMA, TD-SCDMA and WLAN.

Further, as shown in fig. 2, the rf amplifying module 50 in the remote terminal includes a downlink rf module 51 and an uplink rf module 52. The downlink rf module 51 includes a plurality of downlink power amplifiers and a group of TD-SCDMA rf units 515, where the downlink power amplifiers are mainly used to amplify the power of downlink signals of each system from the frequency conversion module 40, so as to cover the downlink output power of the device required by the system; the uplink rf module 52 includes multiple uplink low noise amplifiers and an AP unit 525, where the multiple uplink low noise amplifiers mainly amplify uplink signals of each communication system from the combining module 60, and the AP unit 525 is configured to implement uplink and downlink transceiving of WLAN signals. Because the TD-SCDMA and the WLAN are time division duplex systems, and the uplink and the downlink work in the same frequency range, when combining with other systems, the uplink and the downlink signals of the TD-SCDMA system are combined by the downlink combiner 61, and the uplink and the downlink signals of the WLAN system are combined by the uplink combiner 62.

Specifically, as shown in fig. 2, the multiple downlink power amplifiers in the remote terminal include a GSM power amplifier 511, a DCS power amplifier 512, a CDMA power amplifier 513, and a WCDMA power amplifier 514; the multi-path uplink low noise amplifier comprises a GSM low noise amplifier 521, a DCS low noise amplifier 522, a CDMA low noise amplifier 523 and a WCDMA low noise amplifier 524. So as to realize the amplification processing of signals from wireless communication networks of a plurality of standards including CDMA, GSM, DCS, WCDMA, TD-SCDMA and WLAN.

Further, as shown in fig. 2, the frequency conversion module 40 in the remote terminal includes an up-conversion unit 41 for reducing the analog intermediate frequency signal to a downlink signal of an actual downlink operating frequency; and a down-conversion unit 42 for converting the uplink signal from the rf amplification module 50 into an analog if signal. And the frequency band range of the signals processed by the up-conversion unit 41 and the down-conversion unit 42 covers a wireless communication network with multiple systems including CDMA, GSM, DCS, WCDMA, TD-SCDMA, and WLAN, so as to support multiple network systems.

Further, as shown in fig. 2, the a/D and D/a conversion module 30 in the remote terminal includes a digital/analog conversion unit 31 for performing conversion of the digital intermediate frequency signal into an analog intermediate frequency signal and an analog/digital conversion unit 32 for performing conversion of the analog intermediate frequency signal into the digital intermediate frequency signal. The digital/analog conversion unit 31 and the analog/digital conversion unit 32 can support the interconversion of analog and digital intermediate frequency signals of 6 channels at most.

Preferably, the optical interface 10 in the remote terminal can support several optical module connections with different rates of 1.5Gbps/3Gbps/5Gbps, and can be configured according to different network system combinations, so as to optimize the construction cost to the maximum extent.

In a particular embodiment, the remote machine includes both an uplink and a downlink. As shown in fig. 2, the uplink includes: a bridge 63, an uplink combiner 62, a GSM low noise amplifier 521, a DCS low noise amplifier 522, a CDMA low noise amplifier 523, a WCDMA low noise amplifier 524, a down-conversion unit 42, an analog/digital conversion unit 32, a digital signal processing module 20, and an optical interface 10. The downlink includes: a bridge 63, a downlink combiner 61, a GSM power amplifier 511, a DCS power amplifier 512, a CDMA power amplifier 513, a WCDMA power amplifier 514, an up-conversion unit 41, a digital/analog conversion unit 31, a digital signal processing module 20, and an optical interface 10. The specific connection of the uplink and downlink portions is shown in fig. 2, in which the uplink and downlink portions share a bridge 63, a digital signal processing module 20 and an optical interface 10.

In the remote terminal in the above embodiment, the downlink operation principle is as follows:

the optical interface 10 receives digital signals combined by a plurality of downlink systems and transmits the digital signals to the digital signal processing module 20, the digital signal processing module 20 separates digital signals of different systems through a series of processing, and places the separated digital intermediate frequency signals on different digital/analog conversion units 31, the digital/analog conversion units 31 convert the digital intermediate frequency signals into analog intermediate frequency signals, the analog intermediate frequency signals of different systems are restored into actual downlink working frequencies of the systems through the up-conversion units 41 of the channels, and power amplification is performed through different power amplifiers in the radio frequency amplification module 50, and multiple paths of downlink signals amplified by the power amplifiers are combined through the downlink combiner 61 and are transmitted to two radio frequency ports through the electrical bridge 63; the downlink digital signals of the WLAN system are processed by the digital signal processing module 20, transmitted to the AP unit 525 through the five-class line for amplification, and then combined with other systems through the uplink combiner 62 and the bridge 63.

the uplink signals received by the two rf ports are input to the uplink combiner 62 through the electrical bridge 63, the uplink combiner 62 separates signals with different frequencies, and transmits the signals to low noise amplifiers of different systems in the uplink rf module 52, the signals are amplified and converted into analog intermediate frequency signals through different down-conversion units 42, and the analog intermediate frequency signals are converted into digital intermediate frequency signals through the analog/digital conversion unit 32, the digital signal processing module 20 processes multiple paths of digital signals from different analog/digital conversion units 32, and after combining multiple paths of uplink digital signals of different networks, the combined digital sequence is put on the optical interface 10 for transmission through the CPRI protocol. After receiving the uplink radio frequency signal from the uplink combiner 62, the AP unit 525 in the WLAN system converts the uplink radio frequency signal into a digital intermediate frequency signal through a series of processes, and transmits the digital intermediate frequency signal to the digital signal processing module 20 through a five-type line to be processed together with uplink signals of other systems.

To sum up, the utility model discloses a set up the digital signal processing module 20 that can the different frequency channel digital signal of simultaneous processing different systems in the remote terminal, AD and DA conversion module 30, frequency conversion module 40, radio frequency amplification module 50 and combine way module 60, make the remote terminal function support the 2G of current three big operators simultaneously, 3G and WLAN communication system's wireless signal covers, including CDMA, GSM, DCS, WCDMA, TD-SCDMA, the wireless communication network of the multiple standard of WLAN in, the way of combining of multisystem and isolation are accomplished inside equipment, reduce the engineering design degree of difficulty, convenient construction and engineering maintenance, once the construction can be in order to realize the wireless signal of a plurality of communication networks and cover, can effectively solve the problem of operator cover network repeated construction and internetwork interference.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.

Claims

1. A remote machine for a remote optical fiber type wireless distribution system is characterized by comprising an optical interface, a digital signal processing module, an A/D and D/A conversion module, a frequency conversion module, a radio frequency amplification module and a combiner module which are sequentially in communication connection; wherein,

2. The remote machine of claim 1, wherein the combining module comprises:

3. The remote unit of claim 1, wherein the rf amplification module comprises a downlink rf module and an uplink rf module: wherein,

4. The remote unit of claim 3, wherein the multi-path downlink power amplifier comprises a GSM power amplifier, a DCS power amplifier, a CDMA power amplifier, and a WCDMA power amplifier;

5. The remote unit of claim 1, wherein the frequency conversion module comprises an up-conversion unit for reducing the analog intermediate frequency signal to a downstream signal of an actual downstream operating frequency;

6. The remote unit of claim 1, wherein said a/D and D/a conversion modules include a digital-to-analog conversion unit for performing digital-to-analog conversion and an analog-to-digital conversion unit for performing analog-to-digital conversion.

7. The remote unit of claim 2, wherein the upstream combiner operating band comprises: a CDMA frequency band of 870-880 MHz, a GSM frequency band of 935-960 MHz, a DCS frequency band of 1805-1850 MHz, a TD-SCDMA frequency band of 1880-1920 MHz and 2010-2025 MHz, and a WCDMA frequency band of 2130-2145 MHz.

8. The remote unit of claim 2, wherein the downstream combiner operating band comprises: a CDMA frequency band of 825-835 MHz; 890-915 MHz GSM frequency band; a DCS frequency band of 1710-1755 MHz; 1940-1955 MHz WCDMA frequency band; 2400-2483.5M Hz WLAN frequency band.