CN101499839A - Four carrier reception allocation implementing apparatus for FDM system - Google Patents
Four carrier reception allocation implementing apparatus for FDM system Download PDFInfo
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Abstract
The invention discloses a four carrier-frequency receiving and distributing implementation device of a frequency division multiplexing system, comprising a four carrier-frequency transceiver. A receiving channel of the four carrier-frequency transceiver has eight transceivers; the device also comprises a receiving and distributing unit which comprises four input interfaces, eight output interfaces and four one-divided-two demultiplexers; wherein, the input interfaces are used for receiving input signals; the one-divided-two demultiplexers are positioned between the input interfaces and the output interfaces; each one-divided-two demultiplexer is corresponding to one input interface and two output interfaces, and is used for dividing each path of input signals into two paths of input signals and outputting the input signals to the output interfaces; the output interfaces is connected with a channel of the four carrier-frequency transceiver; and each output interface is connected with one transceiver in a receiving channel of the transceiver. The invention simplifies the input interface of the receiving channel of the four carrier-frequency transceiver of the frequency division multiplexing system into four, thus realizing distribution of a receiving circuit with quadruple diversity or two-path diversity.
Description
Technical field
The present invention relates to field of wireless communication, relate in particular to a kind of Frequency Division Multiplexing system four carrier and receive the distribution implement device.
Background technology
In wireless telecommunication system, device miniaturization, continuous demand, and the raising of the integrated degree of device cheaply, make transceiver towards high density more, more small size, more direction such as low cost develops.Multichannel independently transceiver is integrated in the module, carries out that the density of carrier frequency is integrated to become an important development direction.Frequency Division Multiplexing system four carrier transceiver just be meant four the tunnel independently the carrier frequency transceiver channel be integrated in the module four carrier transceiver hereinafter referred to as.
For Frequency Division Multiplexing system, well-known, in order to reduce the influence of multipath fading, receiver adopts diversity receiving technology more at large.Space diversity and polarization diversity technique are known.The incoherent antennas of two-way that adopt receive same cell signal respectively more, carry out two diversity receptions; Also have by four road incoherent antennas to receive same cell signal respectively, carry out four diversity receptions, more effective antagonism multipath fading.
Carry out density when integrated at a plurality of carrier frequency of Frequency Division Multiplexing system, the overloading number of channels of transceiver frequently is fixing.Adopt the system of two diversity receptions, receiver quantity is the twice of carrier frequency number; Adopt the system of four diversity receptions, receiver quantity can be four times of carrier frequency number.In the current multi-density carrier frequency integration module adopt two diversity reception schemes, if when using,, can not increase because the quantity of each road receive path is definite as four diversity reception schemes more.Therefore, need to sacrifice carrier frequency quantity, realize carrier frequency four diversity receptions.Be about to of the four road receive paths use of four receive paths of two carrier frequency two diversity reception schemes as a carrier frequency four diversity reception schemes.Sacrifice carrier frequency quantity, the benefit of bringing is can more effective antagonism multipath fading, improves the carrier frequency quality of reception.
Current wireless telecommunication system in order to strengthen the covering of base station, often requires the Frequency Division Multiplexing system base station equipment to possess two diversity reception functions and four diversity reception functions simultaneously, so that flexible networking.Adopt two diversity reception functions to satisfy basic application demand, utilize four diversity reception functions to realize wide the covering.
As shown in Figure 1, the four carrier for existing two diversity reception schemes receives the distribution system block diagram.Wherein, two diversity reception front end units link to each other with the receiver of four carrier transceiver receive path, and from figure as can be seen, the four carrier transceiver receive path of two diversity reception schemes and receiving front-end unit need eight road interfaces.
As shown in Figure 2, reception distribution system block diagram when being used as two carrier frequency four diversity reception schemes for existing four carrier receiver with two diversity reception schemes, wherein, four diversity reception front end units link to each other with the receiver of two carrier frequency four diversity transceiver receive paths, from figure as can be seen, the four carrier receiver of two diversity reception schemes is used as two carrier frequency four diversity reception schemes, also needs eight road interfaces between transceiver receive path and the receiving front-end unit.
When the four carrier transceiver receive path of Frequency Division Multiplexing system was supported four carrier two diversity receptions and two carrier frequency four diversity reception functions simultaneously, existing method interface between receiving front-end unit and transceiver receive path existed shortcoming to be:
1, change maybe when carrying out two diversity reception schemes when four diversity reception schemes are switched when system configuration, need to change six interfaces, interface is removed and is redistributed the mode complexity, adds the error probability of large-engineering operation, has reduced the reliability of system;
2, the receive path of four carrier transceiver needs eight road interfaces, and too much interface/distribution reduces equipment dependability;
3, joint generally is arranged in front panel, and it is attractive in appearance that too much interface/distribution also influences equipment.
Summary of the invention
The technical problem to be solved in the present invention proposes a kind of Frequency Division Multiplexing system four carrier exactly and receives the distribution implement device, overcome in the prior art the many and interface of interface and remove and redistribute the mode complicated problems, simplified the interface section, reduce interface and remove and redistribute quantity, improve the operability of engineering, strengthen reliability.
In order to solve the problems of the technologies described above, the invention provides a kind of Frequency Division Multiplexing system four carrier and receive the distribution implement device, comprise the four carrier transceiver, the receive path of described four carrier transceiver has eight receivers, described device also comprises the reception allocation units, and described reception allocation units comprise four input interfaces, eight output interfaces and four one-to-two splitters; Wherein, described input interface is used for receiving inputted signal; Described one-to-two splitter between input interface and output interface, the corresponding input interface of each one-to-two splitter, corresponding two output interfaces are used for every road input signal is divided into two the tunnel, export to output interface; Described output interface is connected with four carrier transceiver receive path, and each output interface links to each other with one of them receiver of transceiver receive path.
Further, described reception allocation units are positioned at described four carrier transceiver inside, and described output interface is inner output interface.
Further, described input interface is an outer input interface, reception be the signal of the diversity antenna that sends of receiving front-end unit.
Further, described reception allocation units also comprise four variable attenuators, described variable attenuator is between input interface and one-to-two splitter, be connected the corresponding input interface of each variable attenuator, corresponding one-to-two splitter respectively with the input of input interface with the one-to-two splitter.
Further, described reception allocation units also comprise four low noise amplifiers, described low noise amplifier is between input interface and one-to-two splitter, be connected the corresponding input interface of each low noise amplifier, corresponding one-to-two splitter respectively with the input of input interface with the one-to-two splitter.
Further, described reception allocation units also comprise four variable attenuators and four low noise amplifiers, input interface, variable attenuator, low noise amplifier, one-to-two splitter connect successively, the corresponding input interface of each variable attenuator and each low noise amplifier, an one-to-two splitter.
Further, described variable attenuator is voltage-controlled attenuator or numerical-control attenuator.
Further, the connected mode that is connected with four carrier transceiver receive path of described output interface is that printing board PCB cabling or cable connect.
The present invention has been owing to increased the reception allocation units, will and the receiving front-end unit between interface be reduced to four; And, reduce interface and removed and redistributed quantity, improve the operability of engineering, strengthen reliability.Simultaneously, adopt less interface/distribution also to make equipment seem more attractive in appearance.
Description of drawings
Fig. 1 is that a kind of four carrier of existing two diversity reception schemes receives the distribution system block diagram;
Reception distribution system block diagram when Fig. 2 is used as two carrier frequency four diversity reception schemes for a kind of existing four carrier receiver with two diversity reception schemes;
Fig. 3 is position and the external interface block diagram of reception allocation units in system of the embodiment of the invention;
Fig. 4 is the reception allocation units block diagram of the embodiment of the invention;
Fig. 5 be two diversity system base station configuration when being S4/4/4 the embodiment of the invention be applied to four carrier transceiver two diversity system block diagrams;
Fig. 6 be four diversity system base station configuration when being S2/2/2 the embodiment of the invention be applied to the four carrier transceiver and realize two carrier frequency four diversity system block diagrams.
Embodiment
The present invention is by the front end at four carrier transceiver receive path, and newly-increased one receives allocation units, and eight original interfaces are reduced to four interfaces, realizes the reception distribution function of four carrier two diversity receptions and two carrier frequency four diversity.When carrying out four carrier two diversity reception schemes when two carrier frequency four diversity reception schemes are switched, only need change the interface line of two-way diversity antenna, can realize of the conversion of two diversity reception schemes to four diversity reception schemes.Otherwise, when two carrier frequency four diversity reception schemes when four carrier two diversity reception schemes are switched, also be only to change two-way interface line.
Described reception allocation units adopt four input interfaces, receive the signal from diversity antenna, realize that the hardware connection of four carrier two diversity systems or the hardware of two carrier frequency four diversity systems connect; Receive inner each input interface of allocation units by one tunnel one-to-two splitter, the received signal power that is used for prime is sent here distributes, and the signal of realization one-to-two along separate routes; Passing through the signal of every road one-to-two of splitter, export to the receive path of transceiver respectively, specifically, is the receiver of exporting to the transceiver receive path.
The present invention is described in detail below in conjunction with drawings and the specific embodiments.
Fig. 3 shows position and the external interface of reception allocation units in system of the embodiment of the invention.
Wherein, receive allocation units and be positioned at four carrier transceiver inside, eight road receiver front ends in four carrier transceiver receive path.There are four road interfaces described reception allocation units and receiving front-end unit, with eight road interfaces that have of four carrier transceiver receive path.The receiving front-end unit here changes according to the system configuration situation can be different.Receive the received signal of allocation units input,, can realize that the signal of two diversity reception schemes or four diversity reception schemes connects through receiving allocation units from different antennae.
As shown in Figure 4, be the reception allocation units block diagram of the embodiment of the invention, described reception allocation units comprise: four input interfaces, eight output interfaces, four one-to-two splitters; Alternatively, can also comprise four variable attenuators and four low noise amplifiers;
Wherein, described input interface is positioned at four carrier transceiver receive path front end, is outer input interface, is connected receiving inputted signal with the receiving front-end unit; RXIN1 among Fig. 4, RXIN2, RXIN3, RXIN4 promptly are four rf input interfaces;
Described output interface, be inner output interface, be connected with four carrier transceiver receive path, be that each output interface links to each other with one of them receiver of four carrier transceiver receive path, its connected mode can be that PCB (Printed Circuit Board, printed circuit board (PCB)) cabling or cable connect; RXOUT1 among Fig. 4, RXOUT2, RXOU3, TRXOUT4, RXOUT5, RXOUT6, RXOUT7, RXOUT8 promptly are eight output interfaces that receive allocation units;
Described one-to-two splitter is between input interface and output interface; Each input channel is used an one-to-two splitter, is used for every road input signal is divided into two the tunnel, finishes the signal one-to-two and distributes; The output of described one-to-two splitter links to each other with output interface; Do not comprise variable attenuator and low noise amplifier if receive in the allocation units, the input of then described one-to-two splitter links to each other with input interface; If receive in the allocation units and also comprise variable attenuator and/or low noise amplifier, then described one-to-two splitter is positioned at after variable attenuator and/or the low noise amplifier, and the input of one-to-two splitter links to each other with the output of variable attenuator or low noise amplifier;
Described variable attenuator is connected with input interface, and input interface back, promptly every road connects a variable attenuator, power attenuation or receiver sensitivity adjustment or adjusting receive path gain when the connection tower is put when being used for the transceiver channel calibration; Described variable attenuator can adopt voltage-controlled attenuator or numerical-control attenuator; In receiving allocation units, whether variable attenuator and function thereof not necessarily can be selected to use in side circuit;
Described low noise amplifier is positioned at before the one-to-two splitter of every road; Use variable attenuator and low noise amplifier in the ifs circuit simultaneously, this low noise amplifier position is used to improve the noise factor of back level receive path after variable attenuator, before the one-to-two splitter; In receiving allocation units, whether low noise amplifier and function thereof not necessarily can be selected to use in side circuit.
Fig. 5 has provided an application example of the present invention---and when two diversity system base station configuration were S4/4/4 (representing the base station that 3 sectors are arranged, four carrier frequency two diversity in each sector), the present invention was applied to the system block diagram of four carrier transceiver two diversity receptions.
The four carrier transceiver of this moment is configured in the same sub-district.The received signal of four carrier transceiver is all from two-way diversity antenna ANT1 and ANT2.The RXIN1/RXIN3 interface that receives allocation units connects the splitter output signal of receiving front-end unit, ANT1 road respectively; The RXIN2/RXIN4 interface connects the splitter output signal of receiving front-end unit, ANT2 road respectively.
From the received signal of antenna ANT1, through receiving the RXIN1/RXIN3 passage of allocation units, signal is RXOUT1/RXOUT2 and RXOUT5/RXOUT6 totally four tunnel along separate routes; From the received signal of antenna ANT2, through receiving the RXIN2/RXIN4 passage of allocation units, signal is RXOUT3/RXOUT4 and RXOUT7/RXOUT8 totally four tunnel along separate routes; Supply with the receiver of four carrier transceiver receive path respectively, reach the purpose of every sector four carrier.
Fig. 6 has provided the another application of the invention example---when four diversity system base station configuration are that on behalf of the base station, S2/2/2 (3 sectors are arranged, two carrier frequency four diversity in each sector) time, the present invention is applied to the system block diagram that the four carrier transceiver is realized two carrier frequency four diversity receptions.
The four carrier transceiver of this moment uses as the two carrier frequency transceiver, is configured in the same sub-district.Every carrier frequency transceiver disposes four road receivers.The received signal of two carrier frequency is all from four road diversity antenna ANT1～ANT4 of same sub-district.The RXIN1/RXIN2/RXIN3/RXIN4 interface that receives allocation units connects the splitter output signal of receiving front-end unit, ANT1/ANT2/ANT3/ANT4 road respectively.
The RXIN1 channel signal that receives allocation units is RXOUT1 and RXOUT2 two-way altogether along separate routes; The RXIN2 channel signal is RXOUT3 and RXOUT4 two-way altogether along separate routes; The RXIN3 channel signal is RXOUT5 and RXOUT6 two-way altogether along separate routes; The RXIN4 channel signal is RXOUT7 and RXOUT8 two-way altogether along separate routes.Wherein, RXOUT1/RXOUT3/RXOUT5/RXOUT7 four road signals are given carrier frequency 1 and are done four tunnel diversity receptions; RXOUT2/RXOUT4/RXOUT6/RXOUT8 four road signals are given carrier frequency 2 and are done four tunnel diversity receptions, realize four tunnel diversity receptions of two carrier frequency transceiver, and the reception that reaches every sector two carrier frequency four diversity distributes purpose.
Contrast top two kinds of application examples, the RXIN1 that the present invention receives allocation units connects the shunt output of ANT1 all the time, and RXIN2 connects the shunt output of ANT2 all the time.Have only RXIN3 and RXIN4 to change the change connected mode according to base station configuration, RXIN1 need not change with RXIN2 and is connected.
In a word, adopt reception allocation units of the present invention, not only simplified interface, also simplified the connection change that configuration causes simultaneously, improve engineering and system reliability.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (8)
1, a kind of Frequency Division Multiplexing system four carrier receives and distributes implement device, comprise the four carrier transceiver, the receive path of described four carrier transceiver has eight receivers, it is characterized in that, described device also comprises the reception allocation units, and described reception allocation units comprise four input interfaces, eight output interfaces and four one-to-two splitters; Wherein, described input interface is used for receiving inputted signal; Described one-to-two splitter between input interface and output interface, the corresponding input interface of each one-to-two splitter, corresponding two output interfaces are used for every road input signal is divided into two the tunnel, export to output interface; Described output interface is connected with four carrier transceiver receive path, and each output interface links to each other with one of them receiver of transceiver receive path.
2, device as claimed in claim 1 is characterized in that, described reception allocation units are positioned at described four carrier transceiver inside, and described output interface is inner output interface.
3, device as claimed in claim 1 is characterized in that, described input interface is an outer input interface, reception be the signal of the diversity antenna that sends of receiving front-end unit.
4, device as claimed in claim 1, it is characterized in that, described reception allocation units also comprise four variable attenuators, described variable attenuator is between input interface and one-to-two splitter, be connected the corresponding input interface of each variable attenuator, corresponding one-to-two splitter respectively with the input of input interface with the one-to-two splitter.
5, device as claimed in claim 1, it is characterized in that, described reception allocation units also comprise four low noise amplifiers, described low noise amplifier is between input interface and one-to-two splitter, be connected the corresponding input interface of each low noise amplifier, corresponding one-to-two splitter respectively with the input of input interface with the one-to-two splitter.
6, device as claimed in claim 1, it is characterized in that, described reception allocation units also comprise four variable attenuators and four low noise amplifiers, input interface, variable attenuator, low noise amplifier, one-to-two splitter connect successively, the corresponding input interface of each variable attenuator and each low noise amplifier, an one-to-two splitter.
As claim 5 or 7 described devices, it is characterized in that 7, described variable attenuator is voltage-controlled attenuator or numerical-control attenuator.
As any described device of claim 1～6, it is characterized in that 8, the connected mode that described output interface is connected with four carrier transceiver receive path is that printing board PCB cabling or cable connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100071711A CN101499839B (en) | 2008-02-02 | 2008-02-02 | Four carrier reception allocation implementing apparatus for FDM system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100071711A CN101499839B (en) | 2008-02-02 | 2008-02-02 | Four carrier reception allocation implementing apparatus for FDM system |
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| Publication Number | Publication Date |
|---|---|
| CN101499839A true CN101499839A (en) | 2009-08-05 |
| CN101499839B CN101499839B (en) | 2013-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008100071711A Expired - Fee Related CN101499839B (en) | 2008-02-02 | 2008-02-02 | Four carrier reception allocation implementing apparatus for FDM system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP1282245A1 (en) * | 2001-07-30 | 2003-02-05 | Telefonaktiebolaget L M Ericsson (Publ) | Channel estimation in a multi carrier transmit diversity system |
| CN1167295C (en) * | 2001-09-28 | 2004-09-15 | 华为技术有限公司 | Base station receiver and transmitter radio frequency front end branching apparatus |
| CN2927564Y (en) * | 2006-07-18 | 2007-07-25 | 华为技术有限公司 | Receiving front-end shunting system for base station |
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Effective date of registration: 20170825 Address after: 621000 Mianyang city of Sichuan province Jiangyou City flag Town People Street No. 25 of No. 1 Patentee after: Li Daiji Address before: 518057 Nanshan District high tech Industrial Park, Guangdong, South Road, science and technology, ZTE building, legal department Patentee before: ZTE Corporation |
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Inventor after: Li Daiji Inventor before: Zhao Zheng |
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Address after: 541002 No. two, No. 5, West Road, Xiangshan District, Guilin, the Guangxi Zhuang Autonomous Region Patentee after: Li Daiji Address before: 621000 Mianyang city of Sichuan province Jiangyou City flag Town People Street No. 25 of No. 1 Patentee before: Li Daiji |
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