CN104640121A - Indoor distribution system, near-end unit and remote unit - Google Patents

Indoor distribution system, near-end unit and remote unit Download PDF

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Publication number
CN104640121A
CN104640121A CN201310571388.6A CN201310571388A CN104640121A CN 104640121 A CN104640121 A CN 104640121A CN 201310571388 A CN201310571388 A CN 201310571388A CN 104640121 A CN104640121 A CN 104640121A
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China
Prior art keywords
signal
frequency
road
mixing portion
different
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CN201310571388.6A
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Chinese (zh)
Inventor
龚兰平
袁震
张利琼
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Shenzhen Huawei Agisson Electric Co Ltd
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Shenzhen Huawei Agisson Electric Co Ltd
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Priority to CN201310571388.6A priority Critical patent/CN104640121A/en
Priority to PCT/CN2014/091025 priority patent/WO2015070782A1/en
Publication of CN104640121A publication Critical patent/CN104640121A/en
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/18—Network planning tools
    • H04W16/20—Network planning tools for indoor coverage or short range network deployment

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Traffic Control Systems (AREA)
  • Transceivers (AREA)

Abstract

The invention provides an indoor distribution system, a near-end unit and a remote unit and relates to the technical field of mobile communications and aims to achieve multi-signal high-speed transmission at the premise of saving resources and avoiding power supply difficulty of the remote unit. The indoor distribution system comprises the near-end unit and the remote unit; the near-end unit is connected with the remote unit through a single feeder cable; the near-end unit comprises a near-end frequency mixing portion; the remote unit comprises a remote frequency mixing portion; the remote frequency mixing portion is a passive device.

Description

A kind of indoor distributed system, near-end machine and remote termination
Technical field
The present invention relates to mobile communication technology field, particularly relate to a kind of indoor distributed system, near-end machine and remote termination.
Background technology
The communication technology is maked rapid progress, along with the development of data communication and multimedia service demand, collection 3G(3rd-generation, G mobile communication) and WLAN(Wireless Local Area Networks, WLAN) in one, and can high quality video image, and image transmitting quality and the equal forth generation mobile communication of high definition TV and technology (4th-generation, 4G) thereof have started to rise.A lot of country and area all adopt LTE(Long Term Evolution, Long Term Evolution) technology is as a kind of 4G standard.
MIMO(Multiple Input Multiple Output can be introduced, multiple-input and multiple-output in the indoor distributed system of LTE system) technology greatly improves power system capacity.So-called MIMO technology refers to and uses multiple transmitting antenna and multiple reception antenna respectively at transmitting terminal and receiving terminal, signal by multiple antenna transmission of transmitting terminal and receiving terminal and reception, thus improves the service quality (bit error rate or data rate) of each user.Base station signal can be connected respectively to multichannel independently in passage by it, and by multiple independently antenna, realizes the multichannel MIMO transmitting-receiving of indoor distributed system.This just means, in indoor distributed system, between base station and each covering point, all needs multichannel feeder to connect.
For newly-built building, can realize the individual transmission of multiple signals by laying multichannel feeder, but long construction period, cost of investment is high, and there is multichannel feeder in work progress and install limited specific question; For the building deploying indoor distributed system, only have a road feeder in its indoor distributed system, the multiple signals of MIMO cannot be supported, if install other road feeders again, problems such as again constructing, cost of investment is high will be faced.
Summary of the invention
Embodiments of the invention provide a kind of indoor distributed system, near-end machine and remote termination, can saving resource and avoid remote termination power difficulty prerequisite under realize the High Speed Transfer of multiple signals.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A first aspect of the present invention, a kind of indoor distributed system is provided, comprise near-end machine and remote termination, described near-end machine is placed on the one end near information source, described remote termination is distributed in indoor each and covers point, and connected by single feeder between described near-end machine and described remote termination, described near-end machine comprises near-end mixing portion, described remote termination comprises far-end mixing portion, and described far-end mixing portion is passive device;
For downgoing line: described near-end machine is from described signal source receiving N road homogenous frequency signal, by described near-end mixing portion, described N road homogenous frequency signal is transformed into the different signal of N road frequency, close road/branch apparatus by near-end and the local oscillation signal in signals different for described N road frequency and described near-end mixing portion is synthesized a descending multiple-frequency signal in road, send to described remote termination through described feeder; Described remote termination closes by far-end the local oscillation signal that described descending multiple-frequency signal to be separated into the different signal of described N road frequency and described near-end mixing portion by road/branch apparatus, by described far-end mixing portion, the local oscillation signal in signals different for described N road frequency and described near-end mixing portion is reduced into described N road homogenous frequency signal;
For uplink: described remote termination receives the N road homogenous frequency signal of user terminal by antenna, by described far-end mixing portion, described N road homogenous frequency signal is transformed into the different signal of N road frequency, close road/branch apparatus by signal syntheses row multiple-frequency signals on the way different for described N road frequency by far-end, send to described near-end machine through described feeder; Described near-end machine closes road/branch apparatus by described near-end and described up multiple-frequency signal is separated into the different signal of described N road frequency, by described near-end mixing portion, signals revivification different for described N road frequency is become described N road homogenous frequency signal; Wherein, N be more than or equal to 2 random natural number.
In the first possible implementation of first aspect, described near-end mixing portion comprises N-1 frequency mixer, specifically for:
For downgoing line: keep the frequency of the wherein road homogenous frequency signal in the homogenous frequency signal of described N road constant, all the other N-1 road homogenous frequency signals are transformed into the different signal of N-1 road frequency respectively by a described N-1 frequency mixer, a described N-1 frequency mixer corresponding N-1 local oscillation signal respectively;
For uplink: keep the frequency of the wherein road signal in the signal that described N road frequency is different constant, by signals different for all the other N-1 road frequencies respectively by a described N-1 frequency mixer, so that signals revivification different for described N-1 road frequency is become N-1 road homogenous frequency signal, wherein, the frequency of the road signal that described frequency is constant equals the frequency of described homogenous frequency signal;
Described far-end mixing portion comprises N-1 passive frequency mixer, specifically for:
For downgoing line: keep the frequency of the wherein road signal in the signal that described N road frequency is different constant, by the local oscillation signal in signals different for all the other N-1 road frequencies and each self-corresponding described near-end mixing portion respectively by described N-1 passive frequency mixer mixing, with respectively by signals revivification different for described N-1 road frequency for N-1 road homogenous frequency signal;
For uplink: the frequency on the wherein road in the N road homogenous frequency signal keeping described antenna to receive is constant, all the other N-1 road homogenous frequency signals are transformed into the different signal of N-1 road frequency respectively by a described N-1 passive frequency mixer, wherein, the frequency of the road signal that described frequency is constant equals the frequency of described homogenous frequency signal.
In the implementation that the second of first aspect is possible, described near-end mixing portion comprises N number of frequency mixer, specifically for:
For downgoing line: described N road homogenous frequency signal is transformed into the different signal of N road frequency respectively by described N number of frequency mixer, described N number of frequency mixer corresponding N number of local oscillation signal respectively;
For downstream signal: signals different for described N road frequency is reduced into described N road homogenous frequency signal respectively by described N number of frequency mixer;
Described far-end mixing portion comprises N number of passive frequency mixer, specifically for:
For downgoing line: by the local oscillation signal in signals different for described N road frequency and corresponding described near-end mixing portion respectively by described N number of passive frequency mixer mixing, being described N road homogenous frequency signal by signals revivification different for described N road frequency respectively;
For uplink: the described N road homogenous frequency signal received by described antenna is transformed into the different signal of described N road frequency respectively by described N number of passive frequency mixer.
In conjunction with any one implementation in each possible implementation above-mentioned of first aspect or first aspect, in the third possible implementation of first aspect, described near-end machine also comprises uplink and downlink signals spacer assembly, described uplink and downlink signals spacer assembly is arranged on described near-end mixing portion and described near-end closes between road/branch apparatus, for the upward signal on every paths and downstream signal being isolated.
In conjunction with the third possible implementation of first aspect, in implementation possible in the 4th of first aspect the, described uplink and downlink signals spacer assembly comprises frequency division signal spacer assembly or time division signal spacer assembly.
In conjunction with the 4th kind of possible implementation of first aspect, in implementation possible in the 5th of first aspect the, described frequency division signal spacer assembly comprises duplexer, and described time division signal spacer assembly comprises circulator or switch.
A second aspect of the present invention, a kind of near-end machine is provided, for the indoor distributed system described in any one implementation in each possible implementation above-mentioned of first aspect or first aspect, described near-end machine comprises near-end mixing portion, and near-end closes road/branch apparatus;
Described near-end mixing portion is used for:
For downgoing line: the N road homogenous frequency signal from signal source receiving is transformed into the different signal of N road frequency;
For uplink: signals revivification different for the N road frequency of closing road/branch apparatus from described near-end is become N road homogenous frequency signal;
Described near-end closes road/branch apparatus and is used for:
For downgoing line: the local oscillation signal in signals different for the described N road frequency from described near-end mixing portion and described near-end mixing portion is synthesized a descending multiple-frequency signal in road, with through feeder distally machine send;
For uplink: the multiple-frequency signal of row on the way from feeder is separated into the different signal of N road frequency;
Wherein, N be more than or equal to 2 random natural number.
In the first possible implementation of second aspect, described near-end mixing portion comprises N-1 frequency mixer, specifically for:
For downgoing line: keep the frequency of the wherein road homogenous frequency signal in the homogenous frequency signal of described N road constant, all the other N-1 road homogenous frequency signals are transformed into the different signal of N-1 road frequency respectively by a described N-1 frequency mixer, a described N-1 frequency mixer corresponding N-1 local oscillation signal respectively;
For uplink: keep the frequency of the wherein road signal in the signal that described N road frequency is different constant, by signals different for all the other N-1 road frequencies respectively by a described N-1 frequency mixer, so that signals revivification different for described N-1 road frequency is become N-1 road homogenous frequency signal, wherein, the frequency of the road signal that described frequency is constant equals the frequency of described homogenous frequency signal.
In conjunction with the first mode in the cards of second aspect, in implementation possible in second of second aspect, described near-end mixing portion comprises N number of frequency mixer, specifically for:
For downgoing line: described N road homogenous frequency signal is transformed into the different signal of N road frequency respectively by described N number of frequency mixer, described N number of frequency mixer corresponding N number of local oscillation signal respectively;
For downgoing line: signals different for described N road frequency is reduced into described N road homogenous frequency signal respectively by described N number of frequency mixer.
The second in conjunction with second aspect mode in the cards, in implementation possible in the 3rd of second aspect the, described near-end machine also comprises N number of first uplink and downlink signals spacer assembly, described first uplink and downlink signals spacer assembly closes road/branch apparatus with described near-end mixing portion with described near-end respectively and is connected, for the upward signal on every paths and downstream signal being isolated.
In conjunction with the third mode in the cards of second aspect, in implementation possible in the 4th of second aspect the, described first uplink and downlink signals spacer assembly comprises the first frequency division signal spacer assembly or the first time division signal spacer assembly.
In conjunction with the 4th kind of mode in the cards of second aspect, in implementation possible in the 5th of second aspect the, described first frequency division signal spacer assembly comprises duplexer, and described first time division signal spacer assembly comprises circulator or switch.
In conjunction with the third mode in the cards of second aspect, in implementation possible in the 6th of second aspect the, described near-end machine also comprises N number of first signal amplifying apparatus, N number of secondary signal amplifying device and N number of 3rd signal amplifying apparatus,
The downstream signal output port of described N number of first uplink and downlink signals spacer assembly closes road/branch apparatus respectively by described N number of first signal amplifying apparatus with described near-end and is connected, for being amplified respectively by downstream signal described in N road;
Described near-end closes road/branch apparatus and is connected, for being amplified respectively by upward signal described in N road respectively by the upward signal input port of described N number of secondary signal amplifying device with described N number of first uplink and downlink signals spacer assembly;
The local oscillation signal output in described near-end mixing portion closes road/branch apparatus respectively by described N number of 3rd signal amplifying apparatus with described near-end and is connected, for being amplified respectively by described N number of local oscillation signal.
In conjunction with the 6th kind of mode in the cards of second aspect, in implementation possible in the 7th of second aspect the, described near-end machine also comprises N number of second uplink and downlink signals spacer assembly,
Described N number of first signal amplifying apparatus downstream signal output port and N number of secondary signal amplifying device upward signal input port respectively N number of second uplink and downlink signals spacer assembly that passes through close road/branch apparatus with described near-end and are connected;
Described second uplink and downlink signals spacer assembly is used for transmitting described upward signal and the described downstream signal after described first signal amplifying apparatus amplifies simultaneously.
A third aspect of the present invention, a kind of remote termination is provided, for the indoor distributed system described in any one implementation in each possible implementation above-mentioned of first aspect or first aspect, described remote termination is made up of passive device, comprises far-end and closes road/branch apparatus, far-end mixing portion;
Described far-end closes road/branch apparatus and is used for:
For downgoing line: the local oscillation signal descending multiple-frequency signal in road from feeder being separated into the different signal of N road frequency and near-end mixing portion;
For uplink: by signal syntheses row multiple-frequency signals on the way different for the N road frequency from described far-end mixing portion, with through described feeder proximally machine send;
Described far-end mixing portion is used for:
For downgoing line: the local oscillation signal in signals different for described N road frequency and described near-end mixing portion is reduced into N road homogenous frequency signal;
For uplink: the N road homogenous frequency signal that antenna receives is transformed into the different signal of N road frequency;
Wherein, N be more than or equal to 2 random natural number.
In the first mode in the cards of the third aspect, described far-end mixing portion comprises N-1 passive frequency mixer, specifically for:
For downgoing line: keep the frequency of the wherein road signal in the signal that described N road frequency is different constant, by the local oscillation signal in signals different for all the other N-1 road frequencies and each self-corresponding described near-end mixing portion respectively by described N-1 passive frequency mixer mixing, with respectively by signals revivification different for described N-1 road frequency for N-1 road homogenous frequency signal, wherein, the frequency of the road signal that described frequency is constant equals the frequency of described homogenous frequency signal;
For upward signal: the frequency on the wherein road in the N road homogenous frequency signal keeping described antenna to receive is constant, all the other N-1 road homogenous frequency signals are transformed into the different signal of N-1 road frequency respectively by a described N-1 passive frequency mixer.
In the second of the third aspect mode in the cards, described far-end mixing portion comprises N number of passive frequency mixer, specifically for:
For downgoing line: by the local oscillation signal in signals different for described N road frequency and corresponding described near-end mixing portion respectively by described N number of passive frequency mixer mixing, being described N road homogenous frequency signal by signals revivification different for described N road frequency respectively;
For uplink: the described N road homogenous frequency signal received by described antenna is transformed into the different signal of described N road frequency respectively by described N number of passive frequency mixer.
The second in conjunction with third aspect mode in the cards, in implementation possible in the 3rd of the third aspect the, described remote termination also comprises N number of filter, described filter is connected with described antenna with described passive frequency mixer respectively, for being filtered out from the signal after mixing by described homogenous frequency signal.
A fourth aspect of the present invention, another kind of indoor distributed system is provided, comprise near-end machine and remote termination, described near-end machine is placed on the one end near information source, described remote termination is distributed in indoor each and covers point, and connected by single feeder between described near-end machine and described remote termination, described near-end machine comprises near-end mixing portion, described remote termination comprises far-end mixing portion, and described far-end mixing portion is passive device;
For downgoing line: the N road homogenous frequency signal of described near-end machine from described signal source receiving LTE system and the signal of 2G and/or 3G system, by described near-end mixing portion, described N road homogenous frequency signal is transformed into the different signal of N road frequency, road/branch apparatus is closed by near-end, by signals different for described N road frequency and the local oscillation signal in described near-end mixing portion and the descending multiple-frequency signal in signal syntheses one tunnel of described 2G and/or 3G system, send to described remote termination through described feeder; Described remote termination closes road/branch apparatus by far-end and described descending multiple-frequency signal is separated into the different signal of described N road frequency and the local oscillation signal in described near-end mixing portion and the signal of described 2G and/or 3G system, by described far-end mixing portion, the local oscillation signal in signals different for described N road frequency and described near-end mixing portion is reduced into described N road homogenous frequency signal;
For uplink: described remote termination receives the N road homogenous frequency signal of the LTE system of user terminal and the signal of 2G and/or 3G system by antenna, described N road homogenous frequency signal is transformed into the different signal of N road frequency by described far-end mixing portion, close road/branch apparatus by the signal syntheses row multiple-frequency signal on the way of signals different for described N road frequency and 2G and/or 3G system by far-end, send to described near-end machine through described feeder; Described up multiple-frequency signal is separated into the signal of the different signal of described N road frequency and 2G and/or 3G system by described near-end machine by described near-end conjunction road/branch apparatus, by described near-end mixing portion, signals revivification different for described N road frequency is become described N road homogenous frequency signal; Wherein, N be more than or equal to 2 random natural number.
The indoor distributed system that the embodiment of the present invention provides, near-end machine and remote termination, for downgoing line, multichannel homogenous frequency signal from signal source receiving can be transformed to the different signal of frequency by near-end mixing portion by near-end machine, and signals different for these frequencies is passed through together with the local oscillation signal in near-end mixing portion the distally machine transmission of single feeder, not only do not need like this to arrange multichannel feeder, save resource, and, also the local oscillation signal in near-end mixing portion is sent to remote termination, remote termination can be made to utilize this local oscillation signal, by passive device, signals revivification different for channelized frequencies is become multichannel homogenous frequency signal, thus solve a power supply difficult problem for remote termination.For uplink, remote termination can be transformed to the different signal of frequency by the multichannel homogenous frequency signal of passive far-end mixing portion in the future user terminal and by single feeder proximally machine send, equally can saving resource and avoid remote termination power difficulty prerequisite under realize the High Speed Transfer of multiple signals.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of a kind of indoor distributed system that Fig. 1 provides for the embodiment of the present invention;
The structural representation in the near-end mixing portion of the near-end machine that Fig. 2 provides for the embodiment of the present invention and the far-end mixing portion of remote termination;
The structural representation in the another kind of near-end mixing portion of the near-end machine that Fig. 3 provides for the embodiment of the present invention and the another kind of far-end mixing portion of remote termination;
The structural representation of the another kind of indoor distributed system that Fig. 4 provides for the embodiment of the present invention;
The structural representation of a kind of near-end machine that Fig. 5 provides for the embodiment of the present invention;
The structural representation of the another kind of near-end machine that Fig. 6 provides for the embodiment of the present invention;
The structural representation of the another kind of near-end machine that Fig. 7 provides for the embodiment of the present invention;
The structural representation of the another kind of near-end machine that Fig. 8 provides for the embodiment of the present invention;
The structural representation of the another kind of near-end machine that Fig. 9 provides for the embodiment of the present invention;
The structural representation of the another kind of near-end machine that Figure 10 provides for the embodiment of the present invention;
The structural representation of the another kind of near-end machine that Figure 11 provides for the embodiment of the present invention;
The structural representation of a kind of remote termination that Figure 12 provides for the embodiment of the present invention;
The structural representation of the another kind of remote termination that Figure 13 provides for the embodiment of the present invention;
The structural representation of the another kind of remote termination that Figure 14 provides for the embodiment of the present invention;
The structural representation of the another kind of remote termination that Figure 15 provides for the embodiment of the present invention;
The structural representation of the another kind of indoor distributed system that Figure 16 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite of not making creative work, all belongs to the scope of protection of the invention.
As shown in Figure 1, embodiments provide a kind of indoor distributed system, comprise near-end machine 11 and remote termination 12, near-end machine 11 is placed on the one end near information source 13, remote termination 12 is distributed in indoor each and covers point, and connected by single feeder 14 between near-end machine 11 and remote termination 12, near-end machine 11 comprises near-end mixing portion 111, remote termination 12 comprises far-end mixing portion 121, and far-end mixing portion 121 is passive device.In Fig. 1, the solid line with arrow between each device represents the flow direction of the different signal of the N road frequency after N road homogenous frequency signal or frequency conversion, the flow direction of the local oscillation signal in the represented by dotted arrows near-end mixing portion 111 with arrow between each device.
For downgoing line: near-end machine 11 receives N road homogenous frequency signal from base station 13, by near-end mixing portion 111, N road homogenous frequency signal is transformed into the different signal of N road frequency, close road/branch apparatus 112 by near-end and the local oscillation signal in signals different for N road frequency and near-end mixing portion 111 synthesized a descending multiple-frequency signal in road, through feeder 14 distally machine 12 send; Remote termination 12 closes by far-end the local oscillation signal that descending multiple-frequency signal to be separated into the different signal of N road frequency and near-end mixing portion 111 by road/branch apparatus 122, by far-end mixing portion 121, the local oscillation signal in signals different for N road frequency and near-end mixing portion 111 is reduced into N road homogenous frequency signal.
For uplink: remote termination 12 receives the N road homogenous frequency signal of user terminal by antenna 123, by far-end mixing portion 121, N road homogenous frequency signal is transformed into the different signal of N road frequency, close road/branch apparatus 122 by signal syntheses different for N road frequency row multiple-frequency signal on the way by far-end, through feeder 14 proximally machine 11 send; Near-end machine 11 closes road/branch apparatus 112 by near-end and up multiple-frequency signal is separated into the different signal of N road frequency, by near-end mixing portion 111, signals revivification different for N road frequency is become N road homogenous frequency signal; Wherein, N be more than or equal to 2 random natural number.
The indoor distributed system that the embodiment of the present invention provides, for downgoing line, the multichannel homogenous frequency signal received from information source 13 can be transformed to the different signal of frequency by near-end mixing portion 111 by near-end machine 11, and by signals different for these frequencies together with the local oscillation signal in near-end mixing portion 111 by single feeder 14 distally machine 12 send, not only do not need like this to arrange multichannel feeder, save resource, and, also the local oscillation signal in near-end mixing portion 111 is sent to remote termination 12, remote termination 12 can be made to utilize this local oscillation signal, by passive device, signals revivification different for channelized frequencies is become multichannel homogenous frequency signal, thus solve a power supply difficult problem for remote termination 12.For uplink, remote termination 12 can be transformed to the different signal of frequency by the multichannel homogenous frequency signal of passive far-end mixing portion 121 in the future user terminal and by single feeder 14 proximally machine 11 send, equally can saving resource and avoid remote termination 12 power difficulty prerequisite under realize the transmission of signal.
That is, the indoor distributed system that the embodiment of the present invention provides, only need single feeder 14, just can realize the transmission of multiple signals, realize the covering of MIMO signal, with respect to multichannel independently passage transmit multichannel MIMO signal, the installation decreasing multichannel feeder of larger amt, save the engineering time, decrease cost of investment; For the building deploying indoor distributed system, only at information source 13 place, near-end machine 11 need be installed, the antenna each being covered point changes remote termination 12 into, utilize existing single feeder, just can realize the covering of MIMO signal, and not need other multichannel feeders are installed again, also not need the powerup issue considering remote termination 12, therefore greatly save construction volume, effectively decrease cost of investment.
It should be noted that, near-end in the present embodiment close road/branch apparatus 112 and far-end close road/branch apparatus 122 can be any can by signal syntheses one tunnel multiple-frequency signals different for channelized frequencies or a device road multiple-frequency signal being separated into the different signal of channelized frequencies, such as, can be multiplefrequency mixer, multiplexer etc., embodiments of the invention limit this.
Because the N road MIMO signal frequency received is identical, in order to make it be transmitted by single feeder 14, first N road homogenous frequency signal to be transformed into the different signal of N road frequency.Specifically, by multiple method, N road homogenous frequency signal can be transformed into the different signal of N road frequency, a wherein road signal frequency of N road homogenous frequency signal such as can be kept constant, and all the other N-1 road homogenous frequency signals are converted to respectively the individual different frequency range of other N-1; Certainly, also N road homogenous frequency signal all can be converted to other N number of different frequency ranges, embodiments of the invention are not construed as limiting this.
Such as, as shown in Figure 2, in one embodiment of the invention, need to keep the frequency of a wherein road homogenous frequency signal constant and Jin Jiang N-1 road homogenous frequency signal is converted to the individual different frequency range of other N-1 respectively, then 111, near-end mixing portion need comprise N-1 frequency mixer 1111, and this N-1 frequency mixer 1111 has respective local frequency respectively.For downgoing line, namely when multichannel homogenous frequency signal transmits from information source to user terminal the circuit of process, N-1 road homogenous frequency signal is transformed into the different signal of N-1 road frequency respectively by this N-1 frequency mixer 1111 in near-end mixing portion 111, an other road homogenous frequency signal is then directly by near-end mixing portion 111, do not carry out frequency translation, namely such N road homogenous frequency signal is transformed into the different signal of N road frequency by near-end mixing portion 111.For uplink, namely when multichannel homogenous frequency signal transmits from user terminal to information source the circuit of process, keep the frequency of the wherein road signal in the signal that N road frequency is different constant, make it directly by near-end mixing portion 111, do not carry out frequency translation, by N-1 the frequency mixer 1111 of signals different for all the other N-1 road frequencies respectively by near-end mixing portion 111, the signals revivification that Yi Jiang N-1 road frequency is different becomes N-1 road homogenous frequency signal, wherein, the frequency of the road signal that frequency is constant equals the frequency of homogenous frequency signal, like this, namely the signal that N road frequency is different is transformed into N road homogenous frequency signal by near-end mixing portion 111.
Because transmission between near-end machine and remote termination, Received signal strength are mutually corresponding, therefore, when near-end mixing portion 111 comprises N-1 frequency mixer, the far-end mixing portion 121 of remote termination also can only include N-1 passive frequency mixer 1211.For downgoing line: far-end mixing portion 121 keeps the frequency of the wherein road signal in the signal that N road frequency is different constant, make it directly by far-end mixing portion 121, do not carry out frequency translation, by the local oscillation signal in signals different for all the other N-1 road frequencies and each self-corresponding near-end mixing portion 111 respectively by N-1 passive frequency mixer 1211, with respectively by signals revivification different for N-1 road frequency for N-1 road homogenous frequency signal, wherein, the frequency of the road signal that frequency is constant equals the frequency of homogenous frequency signal; For uplink: the frequency on a wherein road that antenna can be kept to receive in the N road homogenous frequency signal of user terminal is constant, make it directly by far-end mixing portion 121, do not carry out frequency translation, all the other N-1 road homogenous frequency signals are become respectively by the frequency conversion of N-1 passive frequency mixer 1211 signal that N-1 road frequency is different.
It should be noted that, homogenous frequency signal is become the signal that frequency is different, or conversely signals different for frequency is become in the process of homogenous frequency signal, said homogenous frequency signal is generally high-frequency signal, and the different signal of each frequency said is generally intermediate-freuqncy signal, accordingly, high-frequency signal and intermediate-freuqncy signal select high-frequency element and intermediate frequency device to process respectively.But, when near-end mixing portion 111 and far-end mixing portion 121 are all made up of N-1 frequency mixer, in fact Zhi Jiang N-1 road signal carries out the conversion of frequency, a remaining road signal then remains high frequency state always, and the related device therefore for transmitting this road signal should select corresponding high-frequency device.
Different from the embodiment shown in Fig. 2, as shown in Figure 3, in another embodiment of the present invention, N road homogenous frequency signal is needed all to be converted to other N number of different frequency ranges, then near-end mixing portion 111 can comprise N number of frequency mixer 1111, this N number of frequency mixer has respective local frequency, respectively for downgoing line: N road homogenous frequency signal is become respectively by the frequency conversion of N number of frequency mixer 1111 signal that N road frequency is different by near-end mixing portion 111; For uplink: signals different for N road frequency is reduced into N road homogenous frequency signal respectively by N number of frequency mixer 1111 by near-end mixing portion 111.Portion 111 is corresponding with near-end mixing, the far-end mixing portion 121 of remote termination also can comprise N number of passive frequency mixer 1211, for downgoing line: far-end mixing portion 121 by the local oscillation signal in signals different for N road frequency and corresponding near-end mixing portion 111 respectively by N number of passive frequency mixer 1211, with respectively by signals revivification different for N road frequency for N road homogenous frequency signal; For uplink: the N road homogenous frequency signal carrying out user terminal that antenna receives by far-end mixing portion 121 becomes respectively by the frequency conversion of N number of passive frequency mixer 1211 signal that N road frequency is different.
It should be noted that, in the present embodiment, the frequency mixer 1111 of said near-end machine can be active mixer, also can be passive frequency mixer.Because active mixer itself has local oscillation signal, the signal power after mixing is comparatively large, and, near-end machine power taking generally than being easier to, so, preferred active mixer.And if frequency mixer 1111 is passive frequency mixer, then the local oscillation signal in mixing portion 111 can be to be become by homogenous frequency signal in the process of the different signal of frequency from passive frequency mixer to produce, because homogenous frequency signal is generally high-frequency signal, then after passive frequency mixer frequency conversion, two-way intermediate-freuqncy signal can be produced, a wherein road signal when the different signal of working frequency, it is local oscillation signal that another road then can be used as.
Also it should be noted that, the indoor distributed system that above-described embodiment provides can transmit upward signal and downstream signal simultaneously, and wherein, the transmission path of upward signal is uplink, and the transmission path of downstream signal is downgoing line.Uplink mentioned here and downgoing line definition based on signal flows to, and uplink and downgoing line both can be the passage be separated from each other physically, also can be common-use tunnel each other, can also be that part is separated, the passage of partial common, embodiments of the invention be not construed as limiting this.
Better upward signal and downstream signal are transmitted to enable indoor distributed system, avoid the mutual interference between upward signal and downstream signal, preferably, as shown in Figure 4, in one embodiment of the invention, the near-end machine 11 of indoor distributed system also can comprise uplink and downlink signals spacer assembly 113, and uplink and downlink signals spacer assembly 113 can be arranged on near-end mixing portion 111 and near-end closes between road/branch apparatus 112, for the upward signal on every paths and downstream signal being isolated.
Optionally, according to the difference of signal isolation method, uplink and downlink signals spacer assembly 113 can be frequency division signal spacer assembly, can be also time division signal spacer assembly, is respectively used to be separated from frequency domain by uplink and downlink signal or separate from time domain.Wherein, frequency division signal spacer assembly can comprise duplexer etc., and time division signal spacer assembly can comprise the device such as circulator or switch.Like this, by uplink and downlink signals spacer assembly 113 by the upward signal on every paths and downstream signal isolation, can ensure that uplink and downgoing line can normally work simultaneously.
It should be noted that, although in above-described embodiment, indoor distributed system comprises a near-end machine and a remote termination, the present invention is not limited thereto.In modern communications, a general corresponding multiple terminal in base station, as a same reason, in other embodiments of the invention, in a set of indoor distributed system, near-end machine also can corresponding multiple remote termination, and each remote termination is connected with near-end machine by single feeder.Each remote termination is identical or similar with previous embodiment with operation principle with the connection of near-end machine, has been described in detail above, has repeated no more herein.
Accordingly, as shown in Figure 5, the embodiment of the present invention also provides a kind of near-end machine 21, for any one indoor distributed system that previous embodiment provides.In Fig. 5, the solid line bar of the band arrow between each device represents the flow direction of the different signal of the N road frequency after N road homogenous frequency signal or frequency conversion, and the dashed bars of the band arrow between each device represents the flow direction of the local oscillation signal in near-end mixing portion 111.
Near-end machine 21 comprises near-end mixing portion 211, near-end closes road/branch apparatus 212; Wherein, near-end mixing portion 211 for: for downgoing line: the N road homogenous frequency signal received from information source 23 is transformed into the different signal of N road frequency; For uplink: signals revivification different for the N road frequency of closing road/branch apparatus 212 from near-end is become N road homogenous frequency signal.Near-end close road/branch apparatus 212 for: for downgoing line: the local oscillation signal in signals different for the N road frequency from near-end mixing portion 211 and near-end mixing portion 211 is synthesized a descending multiple-frequency signal in road, with through feeder 24 distally machine send; For uplink: the multiple-frequency signal of row on the way from feeder 24 is separated into the different signal of N road frequency; Wherein, N be more than or equal to 2 random natural number.
The near-end machine 21 that the embodiment of the present invention provides, for downgoing line, by near-end mixing portion 211, the multichannel homogenous frequency signal received from information source 23 is transformed to the different signal of frequency, and signals different for these frequencies is synthesized a road multiple-frequency signal together with the local oscillation signal in near-end mixing portion 211, by the distally machine transmission of single feeder 24, not only do not need like this to arrange multichannel feeder, save resource, and, also the local oscillation signal in near-end mixing portion 211 is sent to remote termination, remote termination can be made directly to utilize this local oscillation signal.For uplink, the road multiple-frequency signal received from single feeder 211 can also be separated from each other by near-end machine, and is reduced to N road homogenous frequency signal.Like this, no matter be the downgoing line of multichannel homogenous frequency signal when transmitting from information source 23 to user terminal, or uplink when multichannel homogenous frequency signal transmits from user terminal to information source 23, by the effect of near-end machine 21, multiple signals can be made to realize the transmission of single feeder 24, thus greatly save construction volume, effectively decrease cost of investment.
Below, for N=2, by specific embodiment, near-end machine provided by the invention is described in detail.
A kind of near-end machine 31 that Fig. 6 provides for the embodiment of the present invention, comprise near-end mixing portion 311, near-end closes road/branch apparatus 312, wherein, near-end mixing portion 311 comprises two active mixers 3111, and being respectively used to homogenous frequency signal S1, S2 are transformed to frequency is the signal that 1620 ~ 1690MHz is different with the two-way frequency of 1400 ~ 1470MHz.For downgoing line: from the two-way homogenous frequency signal S1 of information source 33, S2 is input to the near-end mixing portion 311 of near-end machine 31, concrete, input active mixer 3111 respectively, two-way homogenous frequency signal is transformed into the two paths of signals that frequency is 1620 ~ 1690MHz and 1400 ~ 1470MHz by active mixer 3111 respectively, wherein, each active mixer 3111 is a corresponding local oscillation signal respectively, and the frequency of two local oscillation signals is different, the frequency of the such as local oscillation signal of one of them active filter 3111 is 1000MHz, the frequency of the local oscillation signal of another active filter 3111 is 1220MHz, two local oscillation signals of near-end closes road/branch apparatus 312 to be the two paths of signals of 1620 ~ 1690MHz and 1400 ~ 1470MHz and frequency by frequency be 1000MHz and 1220MHz synthesize a descending multiple-frequency signal in road, through feeder 34 distally machine send.For uplink: near-end machine 31 receives row multiple-frequency signal on the way from feeder 34, close road/branch apparatus 312 by near-end and be separated into the two paths of signals that frequency is 1500 ~ 1570MHz and 1280 ~ 1350MHz respectively, the two paths of signals being 1500 ~ 1570MHz and 1280 ~ 1350MHz by frequency by the active mixer 3111 in near-end mixing portion 311 is reduced to two-way homogenous frequency signal S1 respectively, S2, is then uploaded to information source 33.Concrete, near-end in the present embodiment close road/branch apparatus can be any can by signal syntheses one tunnel multiple-frequency signals different for channelized frequencies or a device road multiple-frequency signal being separated into the different signal of channelized frequencies, such as, can be multiplefrequency mixer, multiplexer etc., embodiments of the invention limit this.
In order to avoid the mutual interference between upward signal and downstream signal, preferably, as shown in Figure 7, near-end machine 31 can also comprise two the first uplink and downlink signals spacer assembly 313-1, first uplink and downlink signals spacer assembly 313-1 closes road/branch apparatus 312 with near-end mixing portion 311 with near-end respectively and is connected, for the upward signal on every paths and downstream signal being isolated.
Optionally, according to the difference of signal isolation method, the first uplink and downlink signals spacer assembly 313-1 can be frequency division signal spacer assembly, can be also time division signal spacer assembly, is respectively used to be separated from frequency domain by uplink and downlink signal or separate from time domain.Wherein, frequency division signal spacer assembly can comprise duplexer etc., and time division signal spacer assembly can comprise the device such as circulator or switch.Like this, by the first uplink and downlink signals spacer assembly 313-1 by the upward signal on every paths and downstream signal isolation, can ensure that uplink and downgoing line can normally work simultaneously.
Because remote termination is made up of passive device, in order to make remote termination receive enough high-power signal, preferably, multiple signal amplifying apparatus can be increased to improve the power of the signal sent in near-end machine 31.
Such as, as shown in Figure 8, in the present embodiment, near-end machine 31 can also comprise two the first signal amplifying apparatus 314-1, two secondary signal amplifying device 314-2 and two the 3rd signal amplifying apparatus 314-3, such as, can be signal amplifier etc.The downstream signal output port of two the first uplink and downlink signals spacer assembly 313-1 closes road/branch apparatus 312 respectively by two the first signal amplifying apparatus 314-1 with near-end and is connected, and these two the first signal amplifying apparatus 314-1 are used for two-way downstream signal to amplify respectively; Near-end closes road/branch apparatus 312 and is also connected with the upward signal input port of two the first uplink and downlink signals spacer assembly 313-1 respectively by two secondary signal amplifying device 314-2 simultaneously, and these two secondary signal amplifying device 314-2 are used for two-way upward signal to amplify respectively; The local oscillation signal output in near-end mixing portion 311 closes road/branch apparatus 312 respectively by two the 3rd signal amplifying apparatus 314-3 with near-end and is connected, and these two the 3rd signal amplifying apparatus 314-3 are used for two local oscillation signals to amplify respectively.
It should be noted that, local oscillation signal in near-end mixing portion 311 carries out in the process of amplifying through the 3rd signal amplifying apparatus 314-3, the interference signal of other frequency components may be introduced, in order to reduce or eliminate the impact of this interference signal on local oscillation signal, preferably, as shown in Figure 9, near-end machine 31 can also comprise two filters 315, for reducing or eliminating the noise jamming signal beyond local oscillation signal, 3rd signal amplifying apparatus 314-3 closes road/branch apparatus 312 by filter 315 and near-end and is connected, optionally, filter 315 can be filter.
In above-described embodiment, after the upward signal that every paths transmits simultaneously and downstream signal being isolated by the first uplink and downlink signals spacer assembly 314-1, upward signal and downstream signal transmit respectively on the circuit be separated from each other, concrete, the circuit that the downstream signal output port of the first uplink and downlink signals spacer assembly 313-1 and near-end close between road/branch apparatus 312 is used for transmission of downlink signal, and the circuit between the upward signal input port of the first uplink and downlink signals spacer assembly 314-1 and near-end conjunction road/branch apparatus 312 is for transmitting upward signal.Every paths all needs to close road/branch apparatus 312 with near-end be connected for transmitting upward signal and the circuit of downstream signal, so just needs to take two input/output end ports that near-end closes road/branch apparatus 312.For the indoor distributed system of N=2, two paths needs to take four input/output end ports that near-end closes road/branch apparatus 312, and so when N value is larger, the input/output end port quantity of needs is more, the requirement of near-end being closed to road/branch apparatus 312 is also more, then manufacturing cost is higher.
The port resource of road/branch apparatus 312 is closed in order to save near-end to a certain extent, reduce the manufacturing cost that near-end closes road/branch apparatus 312, simultaneously also in order to make near-end machine 31 can better transmit upward signal and downstream signal simultaneously, avoid interfering with each other between uplink and downlink signals, further, as shown in Figure 10, near-end machine 31 can also comprise two the second uplink and downlink signals spacer assembly 313-2.The downstream signal output port of the first signal amplifying apparatus 314-1 and the upward signal input port of secondary signal amplifying device 314-2 close road/branch apparatus 312 respectively by the second uplink and downlink signals spacer assembly 313-2 with near-end and are connected, namely upward signal and downstream signal occupy the port that near-end closes road/branch apparatus 312 jointly, thus save the port resource that near-end closes road/branch apparatus 312; Second uplink and downlink signals spacer assembly 314-2 is used for transmitting upward signal and the downstream signal after the first signal amplifying apparatus 314-1 amplifies simultaneously.
It should be noted that, second uplink and downlink signals spacer assembly 313-2 is corresponding with the first signal isolating device 314-1, it can be frequency division signal spacer assembly, as duplexer, also can be time division signal spacer assembly, as circulator or switch etc., be respectively used to upward signal and downstream signal separate from frequency domain or separate from time domain.
Also it should be noted that, for same near-end machine, second uplink and downlink signals spacer assembly 313-2 and the first uplink and downlink signals spacer assembly 313-1 needs to be all frequency division signal spacer assembly, or be all time division signal spacer assembly, but be specially frequency division signal spacer assembly or the time division signal spacer assembly of which kind of type, the two can be identical, also can be different.Such as, first uplink and downlink signals spacer assembly 313-1 and the second uplink and downlink signals spacer assembly 313-2 can be all duplexer, or the first uplink and downlink signals spacer assembly 313-1 can be circulator, second uplink and downlink signals spacer assembly 313-2 can be switch, and the present invention is not construed as limiting this.
In above-described embodiment, near-end mixing portion 311 comprises two active mixers, 3111, two active mixers 3111 and carries out frequency conversion respectively to the two-way homogenous frequency signal received, and be converted into the signal of two-way different frequency, but embodiments of the invention is not limited thereto.In other embodiments of the invention, near-end mixing portion also can comprise an active mixer, the mode that two-way homogenous frequency signal is transformed into the different signal of two-way frequency by near-end mixing portion can also be: for the two-way homogenous frequency signal received, wherein a road frequency is constant in maintenance, carrying out frequency conversion by separately leading up to active mixer, being explained below by specific embodiment.
As shown in figure 11, the near-end mixing portion 411 of near-end machine 41 comprises an active mixer 4111, and this active mixer 4111 self is with local oscillation signal.For downgoing line: the two paths of signals from information source 43 is input to near-end machine 41, wherein a road signal does not directly carry out frequency change by near-end mixing portion 411, another road signal then carries out frequency translation through active mixer 4111, like this, behind near-end mixing portion 411, two-way homogenous frequency signal also becomes the different signal of two-way frequency; The signal that two-way frequency is different is isolated respectively by being able to upward signal after the first uplink and downlink signals spacer assembly 413-1, again respectively by the first signal amplifying apparatus 413-1 be exaggerated, finally respectively through the second uplink and downlink signals spacer assembly 413-2 be transferred to near-end close road/branch apparatus 44; The local oscillation signal of active mixer 4111 is amplified by the 3rd signal amplifying apparatus 413-3, then by filter 415 filtering spurious signal, finally transfers to near-end and close road/branch apparatus 412; Near-end closes road/branch apparatus 412 and signals different for two-way frequency and local oscillation signal is synthesized a descending multiple-frequency signal in road, through feeder 44 distally machine transmission.
For uplink: near-end machine 41 receives row multiple-frequency signal on the way from feeder 44, close road/branch apparatus 412 by near-end and be separated into the different signal of two-way frequency, the different signal of two-way frequency respectively through the second uplink and downlink signals spacer assembly 413-2 with isolated with downstream signal, again respectively by secondary signal amplifying device 413-2 with by signal amplify, then proximally transmitted in mixing portion 411 by the first uplink and downlink signals spacer assembly 413-1; By its medium frequency comparatively Gao mono-road signal directly do not do frequency translation by near-end mixing portion 411, and signal lower for another road frequency is carried out frequency conversion by the active mixer 4111 in near-end mixing portion 411, make the frequency after frequency conversion with directly identical by the frequency of near-end mixing Bu411Na road signal.Like this, after the signal that two-way frequency is different passes through near-end mixing portion 411, be namely transformed to two-way homogenous frequency signal, be uploaded to information source 43.It should be noted that, MIMO signal is generally the high-frequency signal of about 2.6G, when carrying out frequency conversion, is become intermediate-freuqncy signal.When near-end mixing portion 411 comprises an active mixer 4111, another road signal is then directly by near-end mixing portion 411, and do not need to carry out frequency conversion, then the related device for transmitting this road signal should select corresponding high-frequency element.In the present embodiment, if the signal transmitted in a certain passage in downgoing line is not through frequency translation, still with upper frequency distally machine send, then corresponding, in uplink, the signal transmitted in this passage still can without frequency translation.
Corresponding with near-end machine, the embodiment of the present invention additionally provides a kind of remote termination, for any one indoor distributed system that the embodiment of the present invention provides.
As shown in figure 12, embodiments provide a kind of remote termination 22, remote termination 22 is made up of passive device, comprises far-end and closes road/branch apparatus 222 and far-end mixing portion 211; Wherein, far-end close road/branch apparatus 222 for: for downgoing line: the local oscillation signal descending multiple-frequency signal in road from feeder 24 being separated into the different signal of N road frequency and near-end mixing portion; For uplink: by signal syntheses different for the N road frequency from far-end mixing portion 221 row multiple-frequency signal on the way, with through feeder 24 proximally machine send; Far-end mixing portion 211 for: for downgoing line: the local oscillation signal in signals different for N road frequency and near-end mixing portion 211 is reduced into N road homogenous frequency signal; For uplink: the N road homogenous frequency signal carrying out user terminal received by antenna 223 is transformed into the different signal of N road frequency; Wherein, N be more than or equal to 2 random natural number.
The remote termination 22 that the embodiment of the present invention provides, for downgoing line, the local oscillation signal in the near-end mixing portion that proximally machine can be utilized to transmit, by the passive device in far-end mixing portion 211, signals revivification different for channelized frequencies is become multichannel homogenous frequency signal, thus solve a power supply difficult problem for remote termination 22.Meanwhile, for uplink, remote termination 22 also can be for conversion into the different signal of frequency by the multichannel homogenous frequency signal of passive far-end mixing portion 211 in the future user terminal, with through single feeder 24 proximally machine send.Like this, no matter be the transmission of downstream signal, or the transmission of upward signal, remote termination 22 can pass through single feeder 24 signal transmission, can solve a difficult problem for power supply simultaneously, thus reduce cost, and because remote termination 22 is made up of passive device, stability is better.
About the operation principle of remote termination, in the indoor distributed system above, carry out corresponding explanation and explanation, below, for N=2, by specific embodiment, remote termination provided by the invention is described in detail.
A kind of remote termination 32 that Figure 13 provides for the embodiment of the present invention, this remote termination is corresponding with any one near-end machine in above-described embodiment; This remote termination 32 is made up of passive device, comprises far-end mixing portion 321, and far-end closes road/branch apparatus 322, and wherein, far-end mixing portion 321 comprises two passive frequency mixers 3211.For downgoing line: closing road/branch apparatus 322 by far-end, the descending multiple-frequency signal in road from feeder 34 is separated into frequency is respectively the signal that 1620 ~ 1690MHz is different with the two-way frequency of 1400 ~ 1470MHz, and frequency is respectively the local oscillation signal in two near-end mixing portions 311 of 1000MHz and 1220MHz, then passive frequency mixer 3211 is passed through respectively by the local oscillation signal mixing of signals different for frequency with corresponding near-end mixing portion 311, namely signal S1 is mixed down by the local oscillation signal of a passive frequency mixer 3211 to be the signal of 1620 ~ 1690MHz and frequency by frequency be 1000MHz, signal S2 is mixed down by the local oscillation signal of another passive frequency mixer 3211 to be the signal of 1400 ~ 1470MHz and frequency by frequency be 1220MHz, S1 and S2 is homogenous frequency signal, then send respectively by antenna 323.For uplink: the two-way homogenous frequency signal S1 receiving user terminal by antenna 323, S2, by passive frequency mixer 3211 by two-way homogenous frequency signal S1, S2 respectively frequency conversion becomes frequency to be the signal that 1500 ~ 1570MHz is different with the two-way frequency of 1280 ~ 1350MHz, then close road/branch apparatus 322 by far-end and frequency be respectively 1500 ~ 1570MHz signal syntheses different with the two-way frequency of 1280 ~ 1350MHz row multiple-frequency signal on the way, through feeder 34 proximally machine 31 send.Concrete, it can be comprise the logical filter of 6 bands that far-end closes road/branch apparatus 322, wherein the passband of 6 band pass filters distinguishes the frequency 1500 ~ 1570MHz of downstream signal and the frequency 1500 ~ 1570MHz of 1280 ~ 1350MHz and upward signal and 1280 ~ 1350MHz of the signal of corresponding two-way different frequency, and the frequency 1000MHz of the local oscillation signal in two near-end mixing portions 311 and 1220MHz.
Preferably, as shown in figure 14, remote termination 32 can also comprise two filters 324, such as filters etc., is separately positioned between passive frequency mixer 3211 and antenna 323, for being extracted from the signal after mixing by homogenous frequency signal.
It should be noted that, in above-described embodiment, far-end mixing portion 321 comprises two passive frequency mixers 3211, but the embodiment of the present invention is not limited thereto, corresponding with the near-end machine 41 of above-mentioned Figure 11, also can comprise a passive frequency mixer for the remote termination receiving above-mentioned near-end machine 41 signal.
As shown in figure 15, the far-end mixing portion 421 of remote termination 42 also can comprise a passive frequency mixer 4211.For downgoing line: close road/branch apparatus 422 by far-end and the descending multiple-frequency signal in road from feeder 44 is separated into the different signal of two-way frequency and a local oscillation signal, by a wherein road signal of signals different for two-way frequency directly by far-end mixing portion 421, another road signal is carried out frequency conversion by passive frequency mixer 4211 together with local oscillation signal, frequency after frequency conversion is identical with the frequency directly by far-end mixing Bu421Na road signal, the signal that then two-way frequency is different is by behind far-end mixing portion 421, be transformed to two-way homogenous frequency signal, again respectively by after filter 424, send through antenna 423 respectively.For uplink: the two-way homogenous frequency signal receiving user terminal by antenna 423, after filter 424, wherein directly will pass through far-end mixing portion 421 by a road signal, another road signal is carried out frequency conversion by the passive frequency mixer 4211 in far-end mixing portion 421, behind far-end mixing portion 421, two-way homogenous frequency signal has then been transformed into the different signal of two-way frequency; Close road/branch apparatus 422 by signal syntheses different for two-way frequency row multiple-frequency signal on the way by far-end, through feeder 44 proximally machine 41 send.
It should be noted that, corresponding with near-end machine 41, MIMO signal is generally the high-frequency signal of about 2.6G, when carrying out frequency conversion, is become intermediate-freuqncy signal.When far-end mixing portion 421 comprises a passive frequency mixer 4211, another road signal is then directly by far-end mixing portion 421, do not need to carry out frequency conversion, then the related device for transmitting this road signal should select corresponding high-frequency element, and such as far-end closes road/branch apparatus 422, filter 424 etc.
The indoor distributed system that above-described embodiment provides, be mainly used in the MIMO signal transmitting LTE system, but the signal of 2G and 3G system commercially still occupies most share, so, when disposing the MIMO signal of the LTE system in 4G system, compatible 2G and 3G signal should be considered, to ensure that the user using now 2G and 3G system can proper communication.
So the embodiment of the present invention additionally provides a kind of indoor distributed system of compatible 2G and 3G signal, for transmitting MIMO signal and 2G and/or the 3G signal of LTE system simultaneously.Specifically as shown in figure 16: a kind of indoor distributed system, comprise near-end machine 51 and remote termination 52, near-end machine 51 is placed on the one end near information source 53, remote termination 52 is distributed in indoor each and covers point, connected by single feeder 54 between near-end machine 51 and remote termination 52, wherein, near-end machine 51 comprises near-end mixing portion, remote termination 52 comprises far-end mixing portion 521, and far-end mixing portion 521 is passive device; For downgoing line: near-end machine 51 receives the N road homogenous frequency signal of LTE system and the signal of 2G and/or 3G system from information source 53, by near-end mixing portion 511, N road homogenous frequency signal is transformed into the different signal of N road frequency, road/branch apparatus 512 is closed by near-end, by signals different for N road frequency and the local oscillation signal in near-end mixing portion 511 and the descending multiple-frequency signal in signal syntheses one tunnel of 2G and/or 3G system, through feeder 54 distally machine 52 send; Remote termination 52 closes road/branch apparatus 522 by far-end and descending multiple-frequency signal is separated into the different signal of N road frequency and the local oscillation signal in near-end mixing portion 511 and the signal of 2G and/or 3G system, by far-end mixing portion 521, the local oscillation signal in signals different for N road frequency and near-end mixing portion 511 is reduced into N road homogenous frequency signal; For uplink: remote termination 52 receives the N road homogenous frequency signal of LTE system and the signal of 2G and/or 3G system of user terminal by antenna 523, N road homogenous frequency signal is transformed into the different signal of N road frequency by far-end mixing portion 521, close road/branch apparatus 522 by the signal syntheses row multiple-frequency signal on the way of signals different for described N road frequency and 2G and/or 3G system by far-end, through feeder 54 proximally machine 51 send; Near-end machine 51 closes by near-end the signal that up multiple-frequency signal to be separated into the different signal of N road frequency and 2G and/or 3G system by road/branch apparatus 512, by near-end mixing portion 511, signals revivification different for N road frequency is become N road homogenous frequency signal; Wherein, N be more than or equal to 2 random natural number.
The indoor distributed system that the embodiment of the present invention provides, road/branch apparatus 512 is closed by the signal syntheses one tunnel multiple-frequency signal of signals different for N road frequency and 2G and/or 3G system by near-end at near-end machine, then transmitted by single feeder 54, like this, by single feeder 54, both the covering of MIMO signal can have been realized, the signal of 2G and/or 3G system can be taken into account simultaneously, especially for the building disposing indoor distributed system, only need place a near-end machine 51 at information source 53 place, the antenna each being covered point changes remote termination 52 into, utilize existing single feeder 54, the covering of MIMO signal can be realized, do not affect again the transmission of the signal of 2G and/or 3G system simultaneously, and, because remote termination 52 is made up of passive device, reliability is strong, and do not need the powerup issue considering remote termination 52.The indoor distributed system that the embodiment of the present invention provides, avoids and installs multichannel feeder, greatly reduce construction volume, save time and cost of investment.
It should be noted that, the indoor distributed system of compatible 2G and the 3G signal that the embodiment of the present invention provides, consistent with the structure of foregoing indoor distributed system, difference part is, when considering 2G and/or 3G signal, for near-end machine 51, need to close road/branch apparatus 512 by 2G and/or 3G signal by near-end, the signal that the channelized frequencies of the LTE system after frequency conversion is different, and local oscillation signal synthesizes a descending multiple-frequency signal in road together, or row multiple-frequency signal will be separated into 2G and/or 3G signal on the way, the signal that the channelized frequencies of the LTE system after frequency conversion is different, and local oscillation signal, accordingly, for remote termination 52, need to close road/branch apparatus 522 by far-end and a descending multiple-frequency signal in tunnel is separated into 2G and/or 3G signal, the different signal of channelized frequencies of LTE system after frequency conversion and local oscillation signal, or signals different for the channelized frequencies of 2G and/or 3G signal, LTE system after frequency conversion and local oscillation signal are synthesized row multiple-frequency signal on the way together.So in the present embodiment, the near-end conjunction road/branch apparatus 512 of near-end machine 51 should comprise the frequency of 2G and/or 3G signal; Accordingly, the far-end of remote termination 52 closes road/branch apparatus 522 and closes road/branch apparatus 511 function class seemingly with the near-end of near-end machine 51, also should comprise the frequency of 2G and/or 3G signal.
So, as long as close road/branch apparatus and far-end conjunction road/corresponding adjustment of branch apparatus do to the near-end of any one indoor distributed system provided in above-described embodiment, the function of compatible 2G and/or 3G signal can be realized, accordingly, corresponding adjustment is done to any one near-end machine provided in above-described embodiment and remote termination, the indoor distributed system of compatible 2G and/or the 3G signal that the embodiment of the present invention provides can be applicable to, at this no longer repeated description.
It should be noted that, in the embodiment of the present invention, corresponding adjustment is done to such as Fig. 8-Figure 11 near-end machine shown in any one, near-end by it closes road/branch apparatus and replaces with the near-end conjunction road/branch apparatus also comprising 2G and/or 3G signal frequency on the basis comprising original LTE system each road signal frequency, and is used in the indoor distributed system of compatible 2G and/or 3G signal by the near-end machine after adjustment.
Owing to comprising the first signal amplifying apparatus and the 3rd signal amplifying apparatus in the near-end machine after adjustment, for downgoing line, signal and the local oscillation signal of every road LTE system all can be amplified to certain power level, thus when this signal and 2G and/or 3G signal are together transferred to remote termination, the signal strength signal intensity of Shi Mei road LTE system can be greater than or equal to the intensity of 2G and/or 3G signal, thus ensure that the quorum sensing inhibitor area of LTE system is more than or equal to the area coverage of 2G and/or 3G signal, thus, the signal of LTE system and 2G and/or 3G signal can be made can to use in identical scope simultaneously, when especially the building disposing indoor distributed system being carried out transforming and utilizes existing indoor distributed system, can ensure that each user can use signal and 2G and/or the 3G signal of LTE system simultaneously.Same reason, secondary signal amplifying device is comprised in near-end machine after adjustment, for upward signal, the signal of every road LTE system all can be amplified to certain power level, thus ensure that the signal of LTE system is equal to or greater than 2G and/or 3G signal strength signal intensity, to ensure that the two can use in identical scope simultaneously.
Optionally, the remote termination that the present embodiment provides can also comprise conjunction road device, as mixer, being arranged between filter, far-end conjunction road/branch apparatus and antenna, sharing an antenna to make a wherein road signal of LTE system and 2G and 3G signal by closing road device.Especially as N=2, a wherein road signal of LTE system is by an antenna sending/receiving signal, another road signal and 2G and 3G signal send/receive signal by closing the shared antenna of road device, then these two antennas can be dual polarized antennas, more improve signal transmit-receive intensity, save the space of remote termination.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of described claim.

Claims (19)

1. an indoor distributed system, comprise near-end machine and remote termination, described near-end machine is placed on the one end near information source, described remote termination is distributed in indoor each and covers point, connected by single feeder between described near-end machine and described remote termination, it is characterized in that, described near-end machine comprises near-end mixing portion, described remote termination comprises far-end mixing portion, and described far-end mixing portion is passive device;
For downgoing line: described near-end machine is from described signal source receiving N road homogenous frequency signal, by described near-end mixing portion, described N road homogenous frequency signal is transformed into the different signal of N road frequency, close road/branch apparatus by near-end and the local oscillation signal in signals different for described N road frequency and described near-end mixing portion is synthesized a descending multiple-frequency signal in road, send to described remote termination through described feeder; Described remote termination closes by far-end the local oscillation signal that described descending multiple-frequency signal to be separated into the different signal of described N road frequency and described near-end mixing portion by road/branch apparatus, by described far-end mixing portion, the local oscillation signal in signals different for described N road frequency and described near-end mixing portion is reduced into described N road homogenous frequency signal;
For uplink: described remote termination receives the N road homogenous frequency signal of user terminal by antenna, by described far-end mixing portion, described N road homogenous frequency signal is transformed into the different signal of N road frequency, close road/branch apparatus by signal syntheses row multiple-frequency signals on the way different for described N road frequency by far-end, send to described near-end machine through described feeder; Described near-end machine closes road/branch apparatus by described near-end and described up multiple-frequency signal is separated into the different signal of described N road frequency, by described near-end mixing portion, signals revivification different for described N road frequency is become described N road homogenous frequency signal; Wherein, N be more than or equal to 2 random natural number.
2. indoor distributed system according to claim 1, is characterized in that,
Described near-end mixing portion comprises N-1 frequency mixer, specifically for:
For downgoing line: keep the frequency of the wherein road homogenous frequency signal in the homogenous frequency signal of described N road constant, all the other N-1 road homogenous frequency signals are transformed into the different signal of N-1 road frequency respectively by a described N-1 frequency mixer, a described N-1 frequency mixer corresponding N-1 local oscillation signal respectively;
For uplink: keep the frequency of the wherein road signal in the signal that described N road frequency is different constant, by signals different for all the other N-1 road frequencies respectively by a described N-1 frequency mixer, so that signals revivification different for described N-1 road frequency is become N-1 road homogenous frequency signal, wherein, the frequency of the road signal that described frequency is constant equals the frequency of described homogenous frequency signal;
Described far-end mixing portion comprises N-1 passive frequency mixer, specifically for:
For downgoing line: keep the frequency of the wherein road signal in the signal that described N road frequency is different constant, by the local oscillation signal in signals different for all the other N-1 road frequencies and each self-corresponding described near-end mixing portion respectively by described N-1 passive frequency mixer mixing, with respectively by signals revivification different for described N-1 road frequency for N-1 road homogenous frequency signal;
For uplink: the frequency on the wherein road in the N road homogenous frequency signal keeping described antenna to receive is constant, all the other N-1 road homogenous frequency signals are transformed into the different signal of N-1 road frequency respectively by a described N-1 passive frequency mixer, wherein, the frequency of the road signal that described frequency is constant equals the frequency of described homogenous frequency signal.
3. indoor distributed system according to claim 1, is characterized in that,
Described near-end mixing portion comprises N number of frequency mixer, specifically for:
For downgoing line: described N road homogenous frequency signal is transformed into the different signal of N road frequency respectively by described N number of frequency mixer, described N number of frequency mixer corresponding N number of local oscillation signal respectively;
For downstream signal: signals different for described N road frequency is reduced into described N road homogenous frequency signal respectively by described N number of frequency mixer;
Described far-end mixing portion comprises N number of passive frequency mixer, specifically for:
For downgoing line: by the local oscillation signal in signals different for described N road frequency and corresponding described near-end mixing portion respectively by described N number of passive frequency mixer mixing, being described N road homogenous frequency signal by signals revivification different for described N road frequency respectively;
For uplink: the described N road homogenous frequency signal received by described antenna is transformed into the different signal of described N road frequency respectively by described N number of passive frequency mixer.
4. the indoor distributed system according to any one of claim 1-3, it is characterized in that, described near-end machine also comprises uplink and downlink signals spacer assembly, described uplink and downlink signals spacer assembly is arranged on described near-end mixing portion and described near-end closes between road/branch apparatus, for the upward signal on every paths and downstream signal being isolated.
5. indoor distributed system according to claim 4, is characterized in that, described uplink and downlink signals spacer assembly comprises frequency division signal spacer assembly or time division signal spacer assembly.
6. indoor distributed system according to claim 5, is characterized in that, described frequency division signal spacer assembly comprises duplexer, and described time division signal spacer assembly comprises circulator or switch.
7. a near-end machine, for the indoor distributed system according to any one of claim 1-6, is characterized in that, described near-end machine comprises near-end mixing portion, and near-end closes road/branch apparatus;
Described near-end mixing portion is used for:
For downgoing line: the N road homogenous frequency signal from signal source receiving is transformed into the different signal of N road frequency;
For uplink: signals revivification different for the N road frequency of closing road/branch apparatus from described near-end is become N road homogenous frequency signal;
Described near-end closes road/branch apparatus and is used for:
For downgoing line: the local oscillation signal in signals different for the described N road frequency from described near-end mixing portion and described near-end mixing portion is synthesized a descending multiple-frequency signal in road, with through feeder distally machine send;
For uplink: the multiple-frequency signal of row on the way from feeder is separated into the different signal of N road frequency;
Wherein, N be more than or equal to 2 random natural number.
8. near-end machine according to claim 7, is characterized in that,
Described near-end mixing portion comprises N-1 frequency mixer, specifically for:
For downgoing line: keep the frequency of the wherein road homogenous frequency signal in the homogenous frequency signal of described N road constant, all the other N-1 road homogenous frequency signals are transformed into the different signal of N-1 road frequency respectively by a described N-1 frequency mixer, a described N-1 frequency mixer corresponding N-1 local oscillation signal respectively;
For uplink: keep the frequency of the wherein road signal in the signal that described N road frequency is different constant, by signals different for all the other N-1 road frequencies respectively by a described N-1 frequency mixer, so that signals revivification different for described N-1 road frequency is become N-1 road homogenous frequency signal, wherein, the frequency of the road signal that described frequency is constant equals the frequency of described homogenous frequency signal.
9. near-end machine according to claim 7, is characterized in that,
Described near-end mixing portion comprises N number of frequency mixer, specifically for:
For downgoing line: described N road homogenous frequency signal is transformed into the different signal of N road frequency respectively by described N number of frequency mixer, described N number of frequency mixer corresponding N number of local oscillation signal respectively;
For downgoing line: signals different for described N road frequency is reduced into described N road homogenous frequency signal respectively by described N number of frequency mixer.
10. near-end machine according to claim 9, it is characterized in that, described near-end machine also comprises N number of first uplink and downlink signals spacer assembly, described first uplink and downlink signals spacer assembly closes road/branch apparatus with described near-end mixing portion with described near-end respectively and is connected, for the upward signal on every paths and downstream signal being isolated.
11. near-end machines according to claim 10, is characterized in that, described first uplink and downlink signals spacer assembly comprises the first frequency division signal spacer assembly or the first time division signal spacer assembly.
12. near-end machines according to claim 11, is characterized in that, described first frequency division signal spacer assembly comprises duplexer, and described first time division signal spacer assembly comprises circulator or switch.
13. near-end machines according to claim 10, is characterized in that, described near-end machine also comprises N number of first signal amplifying apparatus, N number of secondary signal amplifying device and N number of 3rd signal amplifying apparatus,
The downstream signal output port of described N number of first uplink and downlink signals spacer assembly closes road/branch apparatus respectively by described N number of first signal amplifying apparatus with described near-end and is connected, for being amplified respectively by downstream signal described in N road;
Described near-end closes road/branch apparatus and is connected, for being amplified respectively by upward signal described in N road respectively by the upward signal input port of described N number of secondary signal amplifying device with described N number of first uplink and downlink signals spacer assembly;
The local oscillation signal output in described near-end mixing portion closes road/branch apparatus respectively by described N number of 3rd signal amplifying apparatus with described near-end and is connected, for being amplified respectively by described N number of local oscillation signal.
14. near-end machines according to claim 13, is characterized in that, described near-end machine also comprises N number of second uplink and downlink signals spacer assembly,
Described N number of first signal amplifying apparatus downstream signal output port and N number of secondary signal amplifying device upward signal input port respectively N number of second uplink and downlink signals spacer assembly that passes through close road/branch apparatus with described near-end and are connected;
Described second uplink and downlink signals spacer assembly is used for transmitting described upward signal and the described downstream signal after described first signal amplifying apparatus amplifies simultaneously.
15. 1 kinds of remote terminations, for the indoor distributed system according to any one of claim 1-6, is characterized in that, described remote termination is made up of passive device, comprise far-end and close road/branch apparatus, far-end mixing portion;
Described far-end closes road/branch apparatus and is used for:
For downgoing line: the local oscillation signal descending multiple-frequency signal in road from feeder being separated into the different signal of N road frequency and near-end mixing portion;
For uplink: by signal syntheses row multiple-frequency signals on the way different for the N road frequency from described far-end mixing portion, with through described feeder proximally machine send;
Described far-end mixing portion is used for:
For downgoing line: the local oscillation signal in signals different for described N road frequency and described near-end mixing portion is reduced into N road homogenous frequency signal;
For uplink: the N road homogenous frequency signal that antenna receives is transformed into the different signal of N road frequency;
Wherein, N be more than or equal to 2 random natural number.
16. remote terminations according to claim 15, is characterized in that,
Described far-end mixing portion comprises N-1 passive frequency mixer, specifically for:
For downgoing line: keep the frequency of the wherein road signal in the signal that described N road frequency is different constant, by the local oscillation signal in signals different for all the other N-1 road frequencies and each self-corresponding described near-end mixing portion respectively by described N-1 passive frequency mixer mixing, with respectively by signals revivification different for described N-1 road frequency for N-1 road homogenous frequency signal, wherein, the frequency of the road signal that described frequency is constant equals the frequency of described homogenous frequency signal;
For upward signal: the frequency on the wherein road in the N road homogenous frequency signal keeping described antenna to receive is constant, all the other N-1 road homogenous frequency signals are transformed into the different signal of N-1 road frequency respectively by a described N-1 passive frequency mixer.
17. remote terminations according to claim 15, is characterized in that,
Described far-end mixing portion comprises N number of passive frequency mixer, specifically for:
For downgoing line: by the local oscillation signal in signals different for described N road frequency and corresponding described near-end mixing portion respectively by described N number of passive frequency mixer mixing, being described N road homogenous frequency signal by signals revivification different for described N road frequency respectively;
For uplink: the described N road homogenous frequency signal received by described antenna is transformed into the different signal of described N road frequency respectively by described N number of passive frequency mixer.
18. remote terminations according to claim 17, is characterized in that,
Described remote termination also comprises N number of filter, and described filter is connected with described antenna with described passive frequency mixer respectively, for being filtered out from the signal after mixing by described homogenous frequency signal.
19. 1 kinds of indoor distributed systems, comprise near-end machine and remote termination, described near-end machine is placed on the one end near information source, described remote termination is distributed in indoor each and covers point, connected by single feeder between described near-end machine and described remote termination, it is characterized in that, described near-end machine comprises near-end mixing portion, described remote termination comprises far-end mixing portion, and described far-end mixing portion is passive device;
For downgoing line: the N road homogenous frequency signal of described near-end machine from described signal source receiving LTE system and the signal of 2G and/or 3G system, by described near-end mixing portion, described N road homogenous frequency signal is transformed into the different signal of N road frequency, road/branch apparatus is closed by near-end, by signals different for described N road frequency and the local oscillation signal in described near-end mixing portion and the descending multiple-frequency signal in signal syntheses one tunnel of described 2G and/or 3G system, send to described remote termination through described feeder; Described remote termination closes road/branch apparatus by far-end and described descending multiple-frequency signal is separated into the different signal of described N road frequency and the local oscillation signal in described near-end mixing portion and the signal of described 2G and/or 3G system, by described far-end mixing portion, the local oscillation signal in signals different for described N road frequency and described near-end mixing portion is reduced into described N road homogenous frequency signal;
For uplink: described remote termination receives the N road homogenous frequency signal of the LTE system of user terminal and the signal of 2G and/or 3G system by antenna, described N road homogenous frequency signal is transformed into the different signal of N road frequency by described far-end mixing portion, close road/branch apparatus by the signal syntheses row multiple-frequency signal on the way of signals different for described N road frequency and 2G and/or 3G system by far-end, send to described near-end machine through described feeder; Described up multiple-frequency signal is separated into the signal of the different signal of described N road frequency and 2G and/or 3G system by described near-end machine by described near-end conjunction road/branch apparatus, by described near-end mixing portion, signals revivification different for described N road frequency is become described N road homogenous frequency signal; Wherein, N be more than or equal to 2 random natural number.
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