CN103973336A - Electronic devices, device and method for transmitting signals among electronic devices and communication system - Google Patents
Electronic devices, device and method for transmitting signals among electronic devices and communication system Download PDFInfo
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- CN103973336A CN103973336A CN201310036031.8A CN201310036031A CN103973336A CN 103973336 A CN103973336 A CN 103973336A CN 201310036031 A CN201310036031 A CN 201310036031A CN 103973336 A CN103973336 A CN 103973336A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
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- H04B3/36—Repeater circuits
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Abstract
The invention discloses electronic devices, a device and a method for transmitting signals among the electronic devices and a communication system. The device for transmitting the signals among the electronic devices comprises a signal multiplexing and demultiplexing module and a signal transmitting module. The signal multiplexing and demultiplexing module is used for receiving a plurality of channels of signals, compositing the signals and then transmitting the signals to the signal transmitting module; the signal multiplexing and demultiplexing module is further used for receiving composite signals outputted by the signal transmitting module, separating the composite signals to obtain the multiple channels of signals and transmitting the multiple channels of signals to corresponding circuits; the signal transmitting module is used for receiving the composite signals outputted by the signal multiplexing and demultiplexing module, and transmitting the composite signals to external circuits via coaxial cables; the signal transmitting module is further used for receiving composite signals via the coaxial cables and transmitting the composite signals to the signal multiplexing and demultiplexing module, and the composite signals are transmitted from the external circuits. According to the technical scheme, the electronic devices, the device and the method for transmitting the signals among the electronic devices and the communication system have the advantage that the problem that various channels of signals cannot be collinearly transmitted among existing devices is solved.
Description
Technical field
The present invention relates to communication field, relate in particular to device, method electronic equipment and the communication system of realizing the transmission of equipment room signal.
Background technology
Wireless telecommunication system generally has base station product and end product.As shown in Figure 1, wireless telecommunication system generally comprises indoor unit 11, outdoor unit 12 and antenna element 13.Indoor unit 11 is generally the network interface unit of base station and baseband processing unit (have comprise IF processing unit).The remote end module that outdoor unit 12 is base station, is generally radio frequency and the power amplifier module of base station.Antenna element 13 is sky face portion of base station, realizes the sending and receiving of wireless signal, mainly comprises antenna (or built-in LNA module).Between each equipment (comprising equipment unit), often need to transmit multi-signal, as the main communication signal of transmission, control and answer signal between indoor unit 11 and outdoor unit 12, indoor unit 11 is to outdoor unit 12 transmission reference clocks and DC feedback signal, and enabling of the realization that antenna element 13 electricity are adjusted and tower top LNA also needs realization electricity between outdoor unit 12 and antenna element 13 to adjust control signal and electric feed signal to carry.
In existing transmission means, relatively more conventional has two kinds: one is to adopt each road signal to transmit respectively, the multi-signal of wireless telecommunication system equipment room transmission adopts different transmission mediums by the feature of signal, also be various types of signal independent transmission channel is provided, the DC feedback signal that transfers to outdoor unit 12 as indoor unit 11 adopts the feed line between indoor unit 11 and outdoor unit 12 to realize, pilot signal and the outdoor unit 12 of indoor unit 11 to outdoor unit 12 adopts the RS485 differenced communication separated time between indoor unit 11 and outdoor unit 12 to realize to the answer signal of indoor unit 11, and main communication radiofrequency signal (as descending transmitted signal and uplink receiving signal) adopts coaxial radio-frequency cable to realize.The different transmission medium of this employing transmits the mode of unlike signal, require transmission medium (being mainly cable) to be directly proportional to the number of signals that needs transmission, this is in Practical Project construction, require power line, control line, coaxial line all to need independent laying, simultaneously in order to prevent the interference of various types of signal in transmission, the chute of various types of signal also needs to walk separately, and construction cost is very large.The port of various types of signal also will be considered separately corresponding lightning protection safeguard procedures simultaneously, certainly will increase like this design cost and the experimentation cost of wireless telecommunication system equipment, is also a very large challenge to the reliability and maintainability of base station.
Another kind of mode is to adopt optical fiber transmission technique, the multi-signal of wireless telecommunication system equipment room transmission all first adopts digitlization except feed constant power signal, and (institute is first by main signal, the digitlization such as control signal and clock signal), then form high speed serialization digitlization sequence by standard interface protocol, high speed serialization digitlization sequence is realized the recovery of transmission and high speed serialization sequence by the high speed serial transmission approach forming of photoelectric conversion module and Optical Fiber Transmission resource at equipment room, last extraction and the recovery that realizes each signal in the corresponding circuit module in opposite end.In this mode, feed constant power signal still draws separately power line to realize the remote feeding electricity of equipment room, can not realize the conllinear transmission of feed power signal and other signals.Optical Fiber Transmission resource is of great value also very expensive, the cost of fiber interface module is also very high, and each digital signal is combined into high speed serialization digitlization sequence and high speed serialization digitlization sequence reverts to corresponding each digital signal, needs are a large amount of logical process expense and software processing expenditure, increased corresponding cost.
Summary of the invention
The invention provides device, method electronic equipment and the communication system of realizing equipment room signal transmission, solve the problem that existing equipment Jian Ge road signal can not conllinear transmission.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
A kind of device of realizing the transmission of equipment room signal, comprise: signal multiplexing demultiplexing module and signal transmission module, wherein, described signal multiplexing demultiplexing module is used for receiving multiple signals, the multiple signals of reception are carried out compound, by compound signal transmission to described signal transmission module; Also, for receiving the composite signal of described signal transmission module output, the composite signal solution of reception is isolated to multiple signals again, isolated multiple signals are transferred to related circuit; The composite signal that described signal transmission module is exported for receiving described signal multiplexing demultiplexing module, and transfer to external circuit by coaxial cable; Also for receiving by described coaxial cable the composite signal that external circuit is sent, by extremely described signal multiplexing demultiplexing module of the compound signal transmission receiving.
Further, described signal multiplexing demultiplexing module receive and/or isolated multiple signals comprise one or more in modulator control signal, reference clock signal, main communication modulation spectrum signal.
Further, this device of realizing equipment room signal transmission also comprises modulation /demodulation module, for receiving digital controlled signal, transfers to described signal multiplexing demultiplexing module after the digital controlled signal of reception is modulated into modulator control signal; Also for being carried out to demodulation, the isolated modulator control signal of described signal multiplexing demultiplexing module obtains transferring to related circuit after digital controlled signal.
Further, described modulation /demodulation module comprises at least one modulation module and at least one demodulation module.
Further, this device of realizing the transmission of equipment room signal also comprises DC feedback module, for receiving power supply signal, and from power supply signal, extracts feed power signal, transfers to described signal transmission module; The feed power signal that described signal transmission module is exported for receiving described DC feedback module, and transfer to external circuit by described coaxial cable; Or,
DC feedback module is for receiving feed power signal from described signal transmission module, and the feed power signal of reception is converted to after power supply signal and transfers to and treat supply module; Described signal transmission module is for receiving by described coaxial cable the feed power signal that external circuit is sent, by extremely described DC feedback module of the feed power signal transmissions receiving.
Further, described signal transmission module comprises port connector, duplexing low frequency terminal and duplexing high frequency terminal; Wherein, described port connector is for carrying out the mutual of composite signal by described coaxial cable and external circuit; Described duplexing low frequency terminal is for being connected with described DC feedback module; Described duplexing high frequency terminal is for being connected with described signal multiplexing demultiplexing module.
Further, described signal transmission module also comprises lightning protection circuit unit; Described lightning protection circuit unit comprises air discharge tube, high pressure capacitance, air core inductor and piezo-resistance; Described air discharge tube is serially connected between the holding wire and place of working of described port connector; Described air core inductor is serially connected between described port connector and described duplexing low frequency terminal; Described high pressure capacitance is serially connected between the holding wire and described duplexing high frequency terminal of described port connector; Described piezo-resistance one end is connected between described air core inductor and described duplexing low frequency terminal, and the other end is connected with the place of working of described port connector.
A kind of electronic equipment, comprises apparatus body, also comprises the device of realizing the transmission of equipment room signal described in above-mentioned any one; Described apparatus body is used for generating multiple signals, and transfers to described signal multiplexing demultiplexing module, and/or for receiving the isolated multiple signals of described signal multiplexing demultiplexing module.
Further, this electronic equipment is the one in indoor unit in wireless telecommunication system, outdoor unit, antenna element.
A kind of communication system, comprise the first equipment, the second equipment and be connected to the device of realizing the transmission of equipment room signal between described the first equipment and the second equipment, as described in above-mentioned any one, between one in described the first equipment and the second equipment and the described device of realizing the transmission of equipment room signal, transmit multiple signals, another one and the described device of realizing the transmission of equipment room signal are realized the transmission of composite signal by coaxial cable; Or described communication system comprises the first equipment and the second equipment, described the first equipment, the second equipment are the electronic equipment described in above-mentioned any one.
A method that realizes the transmission of equipment room signal, comprising: receive multiple signals; The multiple signals of reception are carried out compound; By coaxial cable by compound signal transmission to external circuit.
Further, this method that realizes the transmission of equipment room signal also comprises: receive by described coaxial cable the composite signal that external circuit sends; The composite signal of reception is isolated to multiple signals; Isolated multiple signals are transferred to related circuit.
Further, described reception and/or isolated multiple signals comprise one or more in modulator control signal, reference clock signal, main communication modulation spectrum signal.
Further, when the multiple signals of described reception comprise modulator control signal, before receiving described modulator control signal, also comprise: the digital controlled signal of reception is modulated into described modulator control signal; When described isolated multiple signals comprise modulator control signal, after isolating described modulator control signal, also comprise: isolated described modulator control signal is demodulated to digital controlled signal, digital controlled signal is transferred to related circuit.
Further, this method that realizes equipment room signal transmission also comprises: receive power supply signal, from the power supply signal receiving, extract feed power signal, by described coaxial cable by described feed power signal transmissions to external circuit; Or, also comprise: receive described feed power signal by described coaxial cable from external circuit, described feed power signal is converted to after power supply signal and transfers to and treat supply module.
Device, method electronic equipment and the communication system of realizing the transmission of equipment room signal provided by the invention, after compound the multiple signals of an equipment generation, transfer to another equipment by coaxial cable, the composite signal receiving from an equipment by coaxial cable is isolated to multiple signals, transfer to another equipment, can realize multiple signals and transmit by coaxial cable conllinear at equipment room, make hardware cost, engineering construction and the maintenance cost of signal transmission relative cheap; And circuit is simple, easily realize, each composition module in the device of realizing the transmission of equipment room signal provided by the invention also can be based on the actual application requirements, increase and decrease flexibly and easily and adjust, to adapt to the requirement of diversity, transmission cost and the transmission quality of the transmission of equipment room signal in wireless telecommunication system.
Brief description of the drawings
Fig. 1 is the structural representation of existing wireless telecommunication system;
The schematic diagram of the device of realizing equipment room signal transmission that Fig. 2 provides for one embodiment of the invention;
Fig. 3 is the schematic diagram of signal multiplexing demultiplexing module in Fig. 2 shown device;
Fig. 4 is the schematic diagram of LC filtering isolated location in signal multiplexing demultiplexing module shown in Fig. 3;
The schematic diagram of the device of realizing equipment room signal transmission that Fig. 5 provides for another embodiment of the present invention;
The schematic diagram of the ASK modulation /demodulation module that Fig. 6 provides for one embodiment of the invention;
Fig. 7 is the schematic diagram of ASK modulating unit in the module of ASK modulation /demodulation shown in Fig. 6;
Fig. 8 is the schematic diagram of ASK demodulating unit 232 in the module of ASK modulation /demodulation shown in Fig. 6;
The schematic diagram of the device of realizing equipment room signal transmission that Fig. 9 provides for another embodiment of the present invention;
The schematic diagram of the device of realizing equipment room signal transmission that Figure 10 provides for another embodiment of the present invention;
The schematic diagram of the signal transmission module that Figure 11 provides for one embodiment of the invention;
The schematic diagram of the signal transmission module that Figure 12 provides for another embodiment of the present invention;
The schematic diagram of the communication system that Figure 13 provides for one embodiment of the invention;
The schematic diagram of the communication system that Figure 14 provides for another embodiment of the present invention;
The schematic diagram of the communication system that Figure 15 provides for another embodiment of the present invention;
The schematic diagram of the communication system that Figure 16 provides for another embodiment of the present invention;
The schematic diagram of the communication system that Figure 17 provides for another embodiment of the present invention.
Embodiment
Main design of the present invention is: by the device of realizing the transmission of equipment room signal provided by the invention, receive multiple signals; The multiple signals of reception are carried out compound; By coaxial cable by compound signal transmission to external circuit.Further, receive by described coaxial cable the composite signal that external circuit sends; The composite signal of reception is isolated to multiple signals; Isolated multiple signals are transferred to related circuit.In the present invention, realize that the device of equipment room signal transmission receives and/or isolated multiple signals including, but not limited to one or more in modulator control signal, reference clock signal, main communication modulation spectrum signal.
In the time that the multiple signals that receive comprise modulator control signal, before receiving described modulator control signal, also comprise: the digital controlled signal of reception is modulated into described modulator control signal;
In the time that isolated multiple signals comprise modulator control signal, after isolating described modulator control signal, also comprise: isolated described modulator control signal is demodulated to digital controlled signal, digital controlled signal is transferred to related circuit.
Further, can also receive power supply signal, from receive power supply signal extract feed power signal, by described coaxial cable by described feed power signal transmissions to external circuit; Or, receive described feed power signal by described coaxial cable from external circuit, described feed power signal is converted to after power supply signal and transfers to and treat supply module.
By reference to the accompanying drawings the present invention is described in further detail below by embodiment.
The schematic diagram of the device of realizing equipment room signal transmission that Fig. 2 provides for one embodiment of the invention, please refer to Fig. 2, and a kind of device of realizing the transmission of equipment room signal, comprising: signal multiplexing demultiplexing module 21 and signal transmission module 22, and its operation principle comprises:
The main control module of one equipment generates multiple signals, the multiple signals of generation are transferred to respectively to signal multiplexing demultiplexing module 21, signal multiplexing demultiplexing module 21 is for receiving this multiple signals, these multiple signals that receive are carried out compound, by compound signal transmission to signal transmission module 22; The composite signal that signal transmission module 22 is exported for receiving signal multiplexing demultiplexing module 21, and transfer to another equipment by coaxial cable, this another equipment can separate this composite signal by another signal multiplexing demultiplexing module;
Signal transmission module 22 is also for receiving by above-mentioned coaxial cable the composite signal that an equipment sends, by the compound signal transmission receiving to signal demultiplexing module 21; Signal demultiplexing module 21 receives the composite signal that signal transmission module 22 is exported, and the composite signal of reception is isolated to multiple signals, isolated multiple signals is transferred to the related circuit of another equipment.
Signal transmission module 22 is realized the transmitted in both directions of equipment room signal.Signal transmission module 22 is made up of the transmission medium that at least meets highest frequency request signal transmission in institute's signal transmission and power signal requirement of strength, comprise the connectivity port at two ends, middle heart yearn, the ground wire (comprise shield stratum) corresponding with heart yearn and during filled media.
In one embodiment, the structure of signal multiplexing demultiplexing module 21 as shown in Figure 3, comprises that LC filtering isolated location 211 and common node 212 form.LC filtering isolated location 211 is for realizing inner each signal with the feedthrough of signal between common node and isolation each other.Common node 212 connects with signal output module 22.
LC filtering isolated location 211 can be isolated duplex network cascade by multiple-stage filtering and be formed, and every grade of LC filtering isolation duplex network is realized the corresponding levels and subordinate's signal to the mutual isolation between feedthrough and signal at the corresponding levels and subordinate's signal at higher level's cascade nodes place.To consist of example by level Four filtering isolation duplex network, as shown in Figure 4: first order filtering isolation duplex network 211a, second level filtering isolation duplex network 211b, third level filtering isolation duplex network 211c and fourth stage filtering isolation duplex network 211d.The signal that LC filtering isolated location 211 can be realized totally four kinds of different center frequency, different spectral feature is like this with first order filtering isolation duplex net 211a common node feedthrough and isolation each other.The filtering isolation duplex network of every one-level can be made up of high pass filter and low pass filter.Each one end of high pass filter and low pass filter is joined together to form the common port of duplex network, and the other end of two filter is the duplexing terminal of duplex network.
The schematic diagram of the device of realizing equipment room signal transmission that Fig. 5 provides for another embodiment of the present invention, please refer to Fig. 5, with Fig. 2 difference be, this realizes the device of equipment room signal transmission, also comprise modulation /demodulation module 23, the digital controlled signal generating for receiving an equipment, after being modulated into modulator control signal, the digital controlled signal of reception transfers to signal multiplexing demultiplexing module 21, signal multiplexing demultiplexing module 21 receives this modulation signal, this modulator control signal and other each road signals of receiving are carried out compound, transfer to signal transmission module 22.Modulation /demodulation module 23 is also for carrying out transferring to related circuit after demodulation to the isolated modulator control signal of signal multiplexing demultiplexing module 21.What this embodiment provided realizes the device that equipment room signal transmits, and can realize equipment room digital controlled signal, reference clock signal and main communication modulation spectrum signal by the conllinear transmission of coaxial cable.
In one embodiment, modulation /demodulation module 23 is ASK (Amplitude Shift Keying, amplitude shift keying) modulation /demodulation module.
In one embodiment, as shown in Figure 6, ASK modulation /demodulation module 23 ' further comprise ASK modulating unit 231 ', ASK demodulating unit 232 ' and ASK sending/receiving switch unit 233 '.ASK modulating unit is for receiving the digital controlled signal that an equipment main control unit is sent; and this signal is carried out becoming ASK modulated transmit signal after ASK modulation; and deliver to ASK sending/receiving switch unit, ASK sending/receiving switch unit sends it to signal multiplexing demultiplexing module 21; ASK sending/receiving switch unit is also for receiving isolated ASK modulated received signal from signal multiplexing demultiplexing module 21, and be sent to ASK demodulating unit, ASK demodulating unit carries out becoming digital controlled signal after ASK demodulation and filter shape to this signal, and delivers to related circuit.
As shown in Figure 7, ASK modulating unit 231 ' may further include crystal oscillator carrier-frequency circuit 231a ', gate (or door) modulation circuit 231b ', amplitude adjusting circuit 231c ' and low-pass filter circuit 231d '.
As shown in Figure 8, ASK demodulating unit 232 ' may further include filter amplification circuit 232a ', envelope detection circuit 232b ', relatively decision circuit 232c ' and gate shaping circuit 232d '.Filter amplification circuit 232a ' can be made up of the integrated fortune of putting, and envelope detection circuit 232b ' can be made up of integrated transporting discharging and rf diode, and relatively decision circuit 232c ' can be the hysteresis comparator circuit of comparator composition.
ASK sending/receiving switch unit 233 ' may further include analog switch, common port offset generating circuit, common port filter circuit.Wherein common port offset generating circuit adopts the mode of electric resistance partial pressure to produce bias voltage.Common port filter circuit is realized the more filtering of low frequency signal and DC component.
Modulation /demodulation module 23 can also be made up of at least one modulation module and at least one demodulation module.Can based on the actual application requirements, increase and decrease flexibly and easily and adjust, to adapt to the requirement of diversity, transmission cost and the transmission quality of the transmission of equipment room signal in wireless telecommunication system.
The schematic diagram of the device of realizing equipment room signal transmission that Fig. 9 provides for another embodiment of the present invention, please refer to Fig. 9, with Fig. 5 difference be, this realizes the device of equipment room signal transmission, also comprise DC feedback module 24, for receiving the power supply signal that an equipment provides, and from power supply signal, extract feed power signal, transfer to signal transmission module 22; The feed power signal that signal transmission module 22 is exported for receiving DC feedback module 24, the multiplexed signals that the feed power signal of reception and signal multiplexing demultiplexing module 21 are exported transfers to external equipment by coaxial cable in the lump, and feed power signal is for powering to external equipment.
Or, please refer to Figure 10, with Fig. 9 difference be, the feed power signal that signal transmission module 22 sends for receive external equipment by coaxial cable, by receive feed power signal transmissions to DC feedback module 24; DC feedback module 24 is for receiving feed power signal from signal transmission module 22, and the feed power signal of reception is converted to after power supply signal and transfers to and treat to obtain power supply from external equipment by supply module.
DC feedback module 24 directly connects with signal transmission module 22, realizes being galvanicly fed to or extracting.DC feedback module 24 can be made up of power inductance and corresponding filter capacitor.
The schematic diagram of the signal transmission module that Figure 11 provides for one embodiment of the invention, please refer to Figure 11, and signal transmission module 22 further comprises port connector 221, duplexing low frequency terminal 222 and duplexing high frequency terminal 223; Wherein, port connector 221 is for by coaxial cable and the mutual composite signal of external circuit; Duplex low frequency terminal 222, for being connected with DC feedback module 24, receives feed power signal from DC feedback module 24, or exports feed power signal to DC feedback module 24; Duplex high frequency terminal 223, for being connected with signal multiplexing demultiplexing module 21, receives composite signal from signal multiplexing demultiplexing module 21, or exports composite signal to signal multiplexing demultiplexing module 21.
The schematic diagram of the signal transmission module that Figure 12 provides for another embodiment of the present invention, please refer to Figure 12, is that signal transmission module 22 also comprises lightning protection circuit unit with Figure 11 difference.The lightning protection protection of component port and the duplex transmission of DC feedback signal and other signals are realized in lightning protection circuit unit.
Lightning protection circuit unit comprises air discharge tube 224a, high pressure capacitance 224b, air core inductor 224c and piezo-resistance 224d; Preferably, air core inductor 224c is the air core inductor of high Q value.
Air discharge tube 224a is directly serially connected between the holding wire and place of working of port connector 221, realizes releasing fast of port lightning surge signal nearby; Air core inductor 224c is serially connected between port connector 221 and duplexing low frequency terminal 222; High pressure capacitance 224b is serially connected between the holding wire and duplexing high frequency terminal 223 of port connector 221; Piezo-resistance 224d one end is connected between air core inductor 224c and duplexing low frequency terminal 222, and the other end is connected with the place of working of port connector 221.Concentrate on below several MHz through the air discharge tube 224a remaining lightning surge signal frequency of processing of releasing, due to the LC filtering isolated location of stopping of high pressure isolation capacitance 224b in cannot entering signal multiplexing and demultiplexing module 21, can only enter duplexing low frequency terminal 222 by air core inductor 224c, and be absorbed by piezo-resistance 224d.Air core inductor 224c and high pressure capacitance 224b have also directly formed the duplex capability of duplex network.
The present invention also provides a kind of electronic equipment, is integrated with the device of realizing the transmission of equipment room signal provided by the invention in this electronic equipment, or is externally connected to the device of realizing the transmission of equipment room signal provided by the invention.Preferably, this electronic equipment is the one in indoor unit in wireless telecommunication system, outdoor unit, antenna element.
As shown in figure 13, the present invention also provides a kind of communication system, this communication system 131 comprise the first equipment 1311, the second equipment 1312 and be connected to the first equipment 1311 and the second equipment 1312 between, the device 1313 of realizing the transmission of equipment room signal described above, one in the first equipment 1311 and the second equipment 1312 and realize mutual multiple signals between the device 1313 of equipment room signal transmission, another one and the device 1313 of realizing the transmission of equipment room signal are realized the transmission of composite signal by coaxial cable.
As shown in figure 14, the present invention also provides another kind of communication system, this communication system 141 comprises and in the first equipment 1411 and the second equipment 1412, the first equipment 1411 and the second equipment 1412, is integrated with respectively device 1411a, the 1412a that realizes the transmission of equipment room signal provided by the invention.The first equipment 1411 and the second equipment 1412 are realized the signal transmission of coaxial cable by 1411a, 1412a.
In one embodiment, suppose that certain wireless communication system comprises indoor unit, outdoor unit and antenna element.Indoor unit is powered by-48V base station power, include Network Interface Module, main control module, MAC (medium access control) control module and baseband intermediate frequency module, N × 64kbit/s interface and the 10Base_T network interface of E1 standard (the European transfer of data universal standard) can be provided, realize the functions such as network interface processing, Base-Band Processing, webmaster Telnet, wherein baseband intermediate frequency module includes transmitter circuitry and receiver circuit.And outdoor unit can be realized the functions such as radio-frequency receiving-transmitting, frequency conversion and filtering.The intermediate frequency of realizing up/down row data by immediate frequency cable between indoor unit and outdoor unit is connected, reference clock is fed to, protocol monitor and remote power feeding.Indoor unit also needs being fed to outdoor unit remote power feeding and reference clock.It is 42M that indoor unit is dealt into frequency centered by the downlink intermediate-freuqncy signal of outdoor unit, the main communication modulation spectrum signal that bandwidth is 3.5M.Centered by the up intermediate-freuqncy signal that indoor unit receives from outdoor unit, be 176M frequently, the main communication modulation spectrum signal that bandwidth is 3.5M.Monitoring between indoor unit and outdoor unit adopts the asynchronous serial UART communications protocol of standard, 9600 baud rates.The reference clock that indoor unit offers outdoor unit is 12M sine wave signal.The direct current of outdoor unit needs-48V/3A.Indoor unit is connected by coaxial IF cable with outdoor unit.By the present invention, aforesaid downlink intermediate-freuqncy signal (main communication modulation spectrum signal), uplink receiving intermediate-freuqncy signal (main communication modulation spectrum signal), reference clock signal, remote monitoring signal (digital controlled signal), monitoring answer signal (digital controlled signal) and feed power signal all can be realized the transmission between indoor unit and outdoor unit by this coaxial IF cable, and concrete implementation is as follows:
As shown in figure 15, in indoor unit 151, increase with lower module: first signal transport module 151e, the first DC feedback module 151f, first signal multiplexing and demultiplexing module 151g and an ASK modulation /demodulation module 151h.Wherein, in indoor unit 151, the port connector of first signal transport module 151e is connected by coaxial IF cable with the port connector of secondary signal transport module 152e, and the duplexing low frequency terminal of first signal transport module 151e is connected with one end of the first DC feedback module 151f, the duplexing high frequency terminal of first signal transport module 151e is connected with the common node of first signal multiplexing and demultiplexing module 151g.The common port of the one ASK modulation /demodulation module 151h is connected to first signal multiplexing and demultiplexing module 151g mono-signal node place.
In outdoor unit 152, increase with lower module: secondary signal transport module 152e, the second DC feedback module 152f, secondary signal multiplexing and demultiplexing module 152g and the 2nd ASK modulation /demodulation module 152h.Wherein, the port connector of secondary signal transport module 152e is connected by coaxial IF cable with the port connector of first signal transport module 151e, and the duplexing low frequency terminal of secondary signal transport module 152e is connected with one end of the second DC feedback module 152f, the duplexing high frequency terminal of secondary signal transport module 152e is connected with the common node of secondary signal multiplexing and demultiplexing module 152g.The common port of the 2nd ASK modulation /demodulation module 152h is connected to secondary signal multiplexing and demultiplexing module 152g mono-signal node place.
Between indoor unit 151 and outdoor unit 152, Principle of Signal Transmission comprises:
S1, down emission upwards, in indoor unit 151: come from base station power-48V direct current signal enters the duplexing low frequency terminal of first signal transport module 151e after the first DC feedback module 151f filtering is processed into feed power signal; The outdoor unit digital supervision signal that base station governor circuit comes enters first signal multiplexing and demultiplexing module 151g mono-signal node place after the modulation of an ASK modulation /demodulation module 151h; The reference clock signal that base station clock circuit comes, the downlink intermediate-freuqncy signal that base station baseband intermediate frequency radiating circuit comes enter first signal multiplexing and demultiplexing module 151g mono-signal node place; The multiple signals that first signal multiplexing and demultiplexing module 151g receives its signal node place carry out compound, composite signal is (preferred, for low-power signal) transfer to the duplexing high frequency terminal of first signal transport module 151e by common node, realize the tandem at first signal transport module 151e with feed power signal, and enter the port connector of first signal transport module 151e, after transmitting by coaxial IF cable to the port connector of secondary signal transport module 152e.
S2, down emission are upwards, in outdoor unit 152: the composite signal that secondary signal transport module 152e receives port connector is carried out the processing of releasing of lightning surge signal, its duplex capability is also realized separating of feed power signal and other signals simultaneously, export feed power signal to second DC feedback module 152f from duplexing low frequency terminal, the second DC feedback module 152f carries out sending subsequent conditioning circuit to after filtering processing, realizes the power supply to outdoor unit 152.Other signals enter secondary signal multiplexing and demultiplexing module 152g from duplexing high-frequency terminal output, in secondary signal multiplexing and demultiplexing module 152g, duplexing filter network isolation at different levels realize downlink intermediate-freuqncy signal, reference clock signal, the separation of ASK modulation signal, ASK modulation signal enters the 2nd ASK modulation /demodulation module 152h, after the 2nd ASK modulation /demodulation module 152h demodulation, revert to and receive digital supervision signal, transmit it to the main control unit of outdoor unit, realize the transmission of pilot signal from indoor unit 151 to outdoor unit 152, reference clock signal is as the frequency source circuit that enters outdoor unit 152 with reference to clock, realize the logical reference of outdoor unit 151 and indoor unit 152 frequency source homologies.Downlink intermediate-freuqncy signal enters the up-converter circuit of outdoor unit, and up-converter circuit continues to produce and send downlink radiofrequency signal to antenna element.
S3, in uplink receiving direction, in outdoor unit 152: the main control unit of outdoor unit 152 sends digital supervision answer signal to the two ASK modulation /demodulation module 152h, after ASK modulation, generate and reply ASK modulation signal, enter a signal node of secondary signal multiplexing and demultiplexing module 152g, uplink receiving intermediate-freuqncy signal is directly sent a signal node of secondary signal multiplexing and demultiplexing module 152g to, the multiple signals that secondary signal multiplexing and demultiplexing module 152g receives its each signal node carry out compound, by common node, composite signal is transmitted to the duplexing high frequency terminal of secondary signal transport module 152e, the port connector of secondary signal transport module 152e arrives the port connector of first signal transport module 151e after transmitting by coaxial IF cable.
S4, in uplink receiving direction, in indoor unit 151: composite signal enters the port connector of first signal transport module 151e, enter the common node of first signal multiplexing and demultiplexing module 151g from the duplexing high frequency terminal of first signal transport module 151e through lightning surge bleed off signal after treatment, first signal multiplexing and demultiplexing module 151g realizes and separating through duplexing filter networks at different levels the reception composite signal of common node, isolated up intermediate-freuqncy signal is fed into the receiving circuit of indoor unit 151, to reply ASK modulation signal enters an ASK modulation /demodulation module 151h and carries out demodulation, produce digital supervision answer signal, digital supervision answer signal enters into the main control unit of indoor unit 151, realizing long-range answer signal receives.
In this embodiment, the device of realizing the transmission of equipment room signal provided by the invention is integrated in the indoor unit 151 and outdoor unit 152 of wireless telecommunication system, realize between indoor unit 151 and outdoor unit 152 the coaxial cable transmission of downlink intermediate-freuqncy signal, uplink receiving intermediate-freuqncy signal, reference clock signal, remote monitoring signal and feed power signal.
In one embodiment, suppose that certain 3G wireless telecommunication system comprises indoor unit, outdoor unit and antenna element.Indoor unit is responsible for the business interface of surveying with wireless network, and the base band signal process of responsible uplink and downlink signals.Outdoor unit is responsible for the middle radio frequency processing of signal downlink baseband signal, completes spectrum shaping, up-conversion, and gain is amplified and the reception of upward signal is amplified, down-conversion, anti-aliasing filter, uplink baseband signal extraction and recovery.Antenna element is realized the transmission of the wireless signal of downlink radio-frequency signal, reception and the amplification of up-link wireless signal, and calibration correction coincidence of need inspection passage is provided.Indoor unit and outdoor unit are realized the transmission of baseband signal by optical fiber interface.Indoor unit is realized the remote power feeding of outdoor unit by direct-current tie.The direct interface of outdoor unit and antenna element is the main radiofrequency signal of a n bar coaxial transmission line+1 calibrating signal coaxial transmission line.Adjust and the support of the upper tower demand of LNA for the new antenna electric of operator, need outdoor unit to realize remote monitoring to antenna element and the control of tower top LNA.In addition outdoor unit also needs antenna element to realize power supply.By the present invention, aforesaid remote monitoring control signal (digital controlled signal), remote monitoring answer signal (digital controlled signal), LNA control signal (digital controlled signal), feed power signal and calibration correction signal (main communication modulation spectrum signal) can be realized the transmission between outdoor unit and antenna element by same coaxial radio-frequency cable, as shown in figure 16, in outdoor unit 161, increase with lower module: first signal transport module 161e, the first DC feedback module 161f, first signal multiplexing and demultiplexing module 161g, the one ASK modulation /demodulation module 161h and an ASK modulation module 161i.In antenna element 162, increase with lower module: secondary signal transport module 162e, the second DC feedback module 162f, secondary signal multiplexing and demultiplexing module 162g, the 2nd ASK modulation /demodulation module 162h and an ASK demodulation module 162i.
Wherein, monitoring control signal, the transmission of monitoring answer signal between outdoor unit 161 and antenna element 162 can be supervised with reference to Figure 15 medium-long range the transmission mechanism of control signal and answer signal thereof; The transmission of feed power signal between outdoor unit 161 and antenna element 162 can be with reference to Figure 15 in the transmission mechanism of feed power signal; The transmission of calibration correction signal between outdoor unit 161 and antenna element 162 can be with reference to Figure 15 in the transmission mechanism of downlink intermediate-freuqncy signal.
With Figure 15 difference be, one, the present embodiment is to realize the many signals conllinear transmission on coaxial cable at outdoor unit 161 and antenna element 162, and therefore the present embodiment is integrated in the device of realizing the transmission of equipment room signal provided by the invention respectively in outdoor unit 161 and antenna element 162; They are two years old, in outdoor unit 161, additionally increase by an ASK modulation module 161i, the common port of the one ASK modulation module 161i is connected to first signal multiplexing and demultiplexing module 161g mono-signal node place, in antenna element 162, additionally increased by an ASK demodulation module 162i, the common port of an ASK demodulation module 162i is connected to secondary signal multiplexing and demultiplexing module 162g mono-signal node place.Wherein, an ASK modulation module 161i is for accessing the LNA control signal that outdoor unit 161 produces, and carries out being delivered to after ASK modulation a signal node of first signal multiplexing and demultiplexing module 161g; The one ASK demodulation module 162i receives ASK modulation signal for the signal node from secondary signal multiplexing and demultiplexing module 162g, carries out exporting LNA after demodulation and control signal to the related circuit of antenna element 162.
In one embodiment, suppose that certain digital microwave transmission system comprises high station and low station, all there is IDU (Indoor Unit at each station, digital microwave indoor unit), ODU (Out Door Unit, digital microwave transceiver,) unit and antenna element, IDU is indoor unit, ODU is outdoor unit.IDU is responsible for the business interface of surveying with wireless network, and the baseband signal of responsible uplink and downlink signals and intermediate-freuqncy signal processing, and feed and remote monitoring to ODU.ODU is responsible for the processing of descending intermediate-freuqncy signal amplitude, up-conversion, and gain is amplified and the reception of upward signal is amplified, down-conversion, gain process.By the present invention, monitoring control signal (digital controlled signal), monitoring answer signal (digital controlled signal), downlink intermediate-freuqncy signal, uplink receiving intermediate-freuqncy signal, feed power signal all can be realized the transmission between IDU and ODU by coaxial cable.As shown in figure 17, in I DU171, increase with lower module: first signal transport module 171e, the first DC feedback module 171f, first signal multiplexing and demultiplexing module 171g, an ASK modulation module 171h and an ASK demodulation module 171i.In ODU172, increase with lower module: secondary signal transport module 172e, the second DC feedback module 172f, secondary signal multiplexing and demultiplexing module 172g, the 2nd ASK modulation module 172h and the 2nd ASK demodulation module 172i.
Wherein, monitoring control signal flows to first signal multiplexing and demultiplexing module 171g after an ASK modulation module 171h is modulated into OOK modulation (special case of ASK modulation) signal, downlink intermediate-freuqncy signal flows to first signal multiplexing and demultiplexing module 171g, first signal multiplexing and demultiplexing module 171g carries out after compound exporting first signal transport module 171e to this two signal, first signal transport module 171e transfers to secondary signal transport module 172e by coaxial cable, secondary signal transport module 172e transfers to secondary signal multiplexing and demultiplexing module 172g, after secondary signal multiplexing and demultiplexing module 172g separates, OOK modulation signal is delivered to the 2nd ASK demodulation module 172i, after demodulation, output monitoring controls signal to the related circuit of ODU172, downlink intermediate-freuqncy signal is exported to the related circuit of ODU172.
OOK monitoring answer signal flows to secondary signal multiplexing and demultiplexing module 172g after the 2nd ASK modulation module 172h is modulated into OOK modulation signal, uplink receiving intermediate-freuqncy signal flows to secondary signal multiplexing and demultiplexing module 172g, secondary signal multiplexing and demultiplexing module 172g carries out after compound exporting secondary signal transport module 172e to this two signal, secondary signal transport module 172e transfers to first signal transport module 171e by coaxial cable, first signal transport module 171e transfers to first signal multiplexing and demultiplexing module 171g, after first signal multiplexing and demultiplexing module 171g separates, OOK modulation signal is delivered to an ASK demodulation module 171i, after demodulation, output monitoring answer signal is to the related circuit of IDU171, uplink receiving intermediate-freuqncy signal is exported to the related circuit of IDU171.
The transmission of feed power signal between IDU171 and ODU172 can be with reference to Figure 15 in the transmission of feed power signal.
The device of realizing the transmission of equipment room signal provided by the invention can be integrated on arbitrary equipment of wireless telecommunication system, realizes the conllinear transmission of the various types of signal including feed power signal, digital controlled signal, reference clock signal and main communication modulation spectrum signal.Make hardware cost, engineering construction and the maintenance cost of the transmission of equipment room signal relative cheap.And, each module in the device of realizing the transmission of equipment room signal provided by the invention also can be based on the actual application requirements, increase and decrease flexibly and easily and adjust, to adapt to the requirement of diversity, transmission cost and the transmission quality of the transmission of equipment room signal in wireless telecommunication system.
Above content is in conjunction with concrete execution mode further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (15)
1. a device of realizing the transmission of equipment room signal, is characterized in that, comprising: signal multiplexing demultiplexing module and signal transmission module, wherein,
Described signal multiplexing demultiplexing module is used for receiving multiple signals, the multiple signals of reception are carried out compound, by compound signal transmission to described signal transmission module; Also, for receiving the composite signal of described signal transmission module output, the composite signal of reception is isolated to multiple signals, isolated multiple signals are transferred to related circuit;
The composite signal that described signal transmission module is exported for receiving described signal multiplexing demultiplexing module, and transfer to external circuit by coaxial cable; Also for receiving by described coaxial cable the composite signal that external circuit sends, by extremely described signal multiplexing demultiplexing module of the compound signal transmission receiving.
2. realize as claimed in claim 1 the device of equipment room signal transmission, it is characterized in that, described signal multiplexing demultiplexing module receives and/or isolated multiple signals comprise one or more in modulator control signal, reference clock signal, main communication modulation spectrum signal.
3. realize as claimed in claim 2 the device of equipment room signal transmission, it is characterized in that, also comprise modulation /demodulation module, for receiving digital controlled signal, transfer to described signal multiplexing demultiplexing module after the digital controlled signal of reception is modulated into described modulator control signal; Also for being carried out to demodulation, the isolated modulator control signal of described signal multiplexing demultiplexing module obtains transferring to related circuit after digital controlled signal.
4. the device of realizing as claimed in claim 3 the transmission of equipment room signal, is characterized in that, described modulation /demodulation module comprises at least one modulation module and at least one demodulation module.
5. the device of realizing as claimed in claim 1 the transmission of equipment room signal, is characterized in that, also comprises DC feedback module, for receiving power supply signal, and from power supply signal, extracts feed power signal, transfers to described signal transmission module; The feed power signal that described signal transmission module is exported for receiving described DC feedback module, and transfer to external circuit by described coaxial cable; Or,
DC feedback module is for receiving feed power signal from described signal transmission module, and the feed power signal of reception is converted to after power supply signal and transfers to and treat supply module; Described signal transmission module is for receiving by described coaxial cable the feed power signal that external circuit sends, by extremely described DC feedback module of the feed power signal transmissions receiving.
6. the device of realizing as claimed in claim 5 the transmission of equipment room signal, is characterized in that, described signal transmission module comprises port connector, duplexing low frequency terminal and duplexing high frequency terminal; Wherein, described port connector is for carrying out the mutual of composite signal by described coaxial cable and external circuit; Described duplexing low frequency terminal is for being connected with described DC feedback module; Described duplexing high frequency terminal is for being connected with described signal multiplexing demultiplexing module.
7. the device of realizing as claimed in claim 6 the transmission of equipment room signal, is characterized in that, described signal transmission module also comprises lightning protection circuit unit; Described lightning protection circuit unit comprises air discharge tube, high pressure capacitance, air core inductor and piezo-resistance; Between the holding wire and place of working that are serially connected in described port connector of described air discharge tube; Described air core inductor is serially connected between described port connector and described duplexing low frequency terminal; Described high pressure capacitance is serially connected between the holding wire and described duplexing high frequency terminal of described port connector; Described piezo-resistance one end is connected between described air core inductor and described duplexing low frequency terminal, and the other end is connected with the place of working of described port connector.
8. an electronic equipment, is characterized in that, comprises apparatus body, also comprises the device of realizing the transmission of equipment room signal as described in claims 1 to 7 any one; Described apparatus body is used for generating multiple signals, and transfers to described signal multiplexing demultiplexing module, and/or for receiving the isolated multiple signals of described signal multiplexing demultiplexing module.
9. electronic equipment as claimed in claim 8, is characterized in that, described electronic equipment is the one in indoor unit in wireless telecommunication system, outdoor unit, antenna element.
10. a communication system, it is characterized in that, comprise the first equipment, the second equipment and be connected to the device of realizing the transmission of equipment room signal between described the first equipment and the second equipment, as described in claims 1 to 7 any one, between one in described the first equipment and the second equipment and the described device of realizing the transmission of equipment room signal, transmit multiple signals, another one and the described device of realizing the transmission of equipment room signal are realized the transmission of composite signal by coaxial cable; Or described communication system comprises the first equipment and the second equipment, described the first equipment, the second equipment are the electronic equipment as described in claims 8 or 9.
Realize the method for equipment room signal transmission for 11. 1 kinds, it is characterized in that, comprising:
Receive multiple signals;
The multiple signals of reception are carried out compound;
By coaxial cable by compound signal transmission to external circuit.
12. methods that realize equipment room signal transmission as described in claims 11, is characterized in that, also comprise;
Receive by described coaxial cable the composite signal that external circuit sends;
The composite signal of reception is isolated to multiple signals;
Isolated multiple signals are transferred to related circuit.
13. methods that realize equipment room signal transmission as described in claims 12, is characterized in that, multiple signals described reception and/or isolated comprise one or more in modulator control signal, reference clock signal, main communication modulation spectrum signal.
14. methods that realize equipment room signal transmission as described in claims 13, is characterized in that, when the multiple signals of described reception comprise modulator control signal, before receiving described modulator control signal, also comprise; The digital controlled signal of reception is modulated into described modulator control signal; When described isolated multiple signals comprise modulator control signal, after isolating described modulator control signal, also comprise; Isolated described modulator control signal is demodulated to digital controlled signal, digital controlled signal is transferred to related circuit.
15. methods that realize equipment room signal transmission as described in claims 13, it is characterized in that, also comprise: receive power supply signal, from receive power supply signal extract feed power signal, by described coaxial cable by described feed power signal transmissions to external circuit; Or, also comprise: receive described feed power signal by described coaxial cable from external circuit, described feed power signal is converted to after power supply signal and transfers to and treat supply module.
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| CN201310036031.8A CN103973336A (en) | 2013-01-30 | 2013-01-30 | Electronic devices, device and method for transmitting signals among electronic devices and communication system |
| PCT/CN2013/085038 WO2014117537A1 (en) | 2013-01-30 | 2013-10-11 | Apparatus, method, electronic device, and communications system for transmitting signal between devices |
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