CN103327508A - Access system for transmitting wireless signals and Ethernet signals by power line - Google Patents
Access system for transmitting wireless signals and Ethernet signals by power line Download PDFInfo
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- CN103327508A CN103327508A CN2013102860690A CN201310286069A CN103327508A CN 103327508 A CN103327508 A CN 103327508A CN 2013102860690 A CN2013102860690 A CN 2013102860690A CN 201310286069 A CN201310286069 A CN 201310286069A CN 103327508 A CN103327508 A CN 103327508A
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Abstract
The invention relates to an access system for transmitting wireless signals and Ethernet signals by a power line. The access system comprises a near-end unit, a coupling part and a far-end part, wherein the near-end unit provides more than one path of output; if the number of output paths is set to be N, the coupling part comprises N coupling units correspondingly, and the far-end part comprises N far-end units correspondingly. The near-end unit is used for converting radio-frequency signals and the Ethernet signals into intermediate frequency signals, and then intermediate frequency signals are coupled onto the power line by the coupling unit and finally transmitted into the far-end unit. The far-end unit is used for reducing the intermediate frequency signals into the radio-frequency signals and the Ethernet signals, and respectively providing services such as wireless signal access, broadband internet, wireless router, etc. The access system solves the problems of difficult engineering construction coordination and long engineering time of telecom operators by virtue of existing power line resources, provides the Ethernet data service while realizing the indoor deep wireless signal coverage of the telecom operators, and guarantees no influence on original power supply during equipment installation by coupling the transmission signals onto the power line by electromagnetic coupling.
Description
Technical field
The present invention relates to the connecting system of a kind of transmitting wireless signals and ethernet signal, refer to utilize power line to carry out a kind of connecting system of above-mentioned two kinds of signals transmission especially.
Background technology
Data statistics shows that the wireless data service more than 70% results from indoor.Along with increasing substantially of Chinese 3G subscription, data service income proportion is more and more higher.For traffic carrying capacity in the better absorption chamber, must improve the indoor signal covering quality, the room area that data traffic requirement is arranged is carried out the indoor covering of the degree of depth.
Along with improving constantly of citizen's environmental consciousness, health perception, wireless signal enters the residential quarter, sets up exterior aerial, and property is coordinated very difficult.Because 3G standard frequency height is subjected to body of wall to stop that seriously penetration loss is big, relies on grand station signal or corridor signal seepage to be difficult to reach good indoor coverage effect.For solving the problem that the indoor degree of depth covers, can adopt transmission mediums such as coaxial cable, optical fiber, twisted-pair feeder to realize transmission of wireless signals, but all there are these cables in not all application scenarios, even lay corresponding cable again, also needs in the face of coordinating the big problem of difficulty.As ubiquitous power line network, can more effectively solve the problem that lacks transmission medium, solve the wireless signal covering problem more rapidly.
Power line carrier communication (PLC) be with power line as information transfer channel, realize the signal transmission.Its principle is to utilize power line to transmit high-frequency signal, and the high-frequency signal of carrying information is loaded on the electric current, utilizes power line transmission then, and the modulator-demodulator of receiving information decomposes high-frequency signal to come out from electric current again.
Summary of the invention
The technical problem to be solved in the present invention, the problem that comprises the indoor degree of depth covering of telecom operators' wireless signal, register one's residence difficulty, property of telecom operators' wireless signal coordinated problem difficult, that the engineering time is long, need not redeploy cable, directly utilize power line network to carry out the problem that indoor signal covers.
Technical scheme of the present invention is a kind of connecting system based on power line transmission wireless signal and ethernet signal: comprise near-end unit, coupling unit and distal portions; The near-end unit provides output more than one tunnel, and establishing the output number is the N road, and coupling unit comprises N corresponding coupling unit, comprises N corresponding far-end unit in the distal portions,
The near-end unit comprises that digital processing element U2, N of converter unit U1, connection ethernet signal is amplified branching unit U3 and power supply unit U4; Converter unit U1 is connected with digital processing element U2, and digital processing element U2 amplifies branching unit U3 and is connected successively respectively with each, forms uplink downlink; Power supply unit U4 connects converter unit U1, digital processing element U2 respectively and respectively amplifies branching unit U3;
The near-end unit is connected by metal medium respectively with each coupling unit, and each coupling unit is connected by power line with the respective distal end unit;
Each far-end unit comprises coupling unit U5, amplifies branching unit U6, digital processing element U7, converter unit U8, Ethernet processing unit U9 and power supply unit U10 in the distal portions; Coupling unit U5, amplification branching unit U6, digital processing element U7 are connected successively with converter unit U8, form uplink downlink; Power supply unit U10 connects amplification branching unit U6, digital processing element U7, converter unit U8 and Ethernet processing unit U9 respectively, and digital processing element U7 connects Ethernet processing unit U9.
And, in the near-end unit, port EM1～EMN and the port E1～EN that is connected digital processing element U2 that branching unit U3 is respectively amplified in connection respectively are set,
In the down link, after wireless signal RF enters near-end unit 100, by converter unit U1 downlink radio-frequency signal DRF is converted to descending intermediate-freuqncy signal DIF; Descending intermediate-freuqncy signal DIF is transformed to baseband signal after handling through digital processing element U2, and with the ethernet signal that enters from port E1～EN framing again after, become descending intermediate-freuqncy signal DIFA by digital processing; The descending intermediate-freuqncy signal DIFA in each road is transferred to port EM1～EMN respectively through after corresponding amplification branching unit U3 amplification and closing the road;
In the up link, each road is transferred to digital processing element U2 after the up intermediate-freuqncy signal UIFA of port EM1～EMN input amplifies through corresponding amplification branching unit U3; Digital processing element U2 is converted to digital signal with up intermediate-freuqncy signal UIFA, and isolates baseband signal and ethernet signal, and wherein ethernet signal is transferred to port E1～EN, and baseband signal is converted to up intermediate-freuqncy signal UIF after digital processing; Converter unit U1 is up radiofrequency signal URF with up intermediate-freuqncy signal UIF frequency conversion, and adopts the mode of radio transmission to pass the base station back.
And, coupling unit coupling electrical power line and metal medium, and adopt the fastening power line of magnetic material and metal medium.
And, in each far-end unit, the port EM17 that connects power line is set;
In the down link, by coupling unit U5 intermediate-freuqncy signal is separated from the power line that is connected to EM17, through amplifying branching unit U6 amplification and isolating descending intermediate-freuqncy signal DIFA; Digital processing element U7 is converted to digital signal with descending intermediate-freuqncy signal DIFA, and isolates baseband signal and ethernet signal, and wherein ethernet signal is transferred to Ethernet processing unit U9, and baseband signal is converted to descending intermediate-freuqncy signal DIF through after the digital processing; Converter unit U8 is radiofrequency signal with descending intermediate-freuqncy signal DIF frequency conversion, is transmitted in the free space by antenna;
In the up link, after wireless signal RF enters far-end unit, by converter unit U8 up radiofrequency signal is converted to up intermediate-freuqncy signal UIF; Up intermediate-freuqncy signal UIF is transformed to baseband signal after handling through digital processing element U7, and with the ethernet signal that comes from Ethernet processing unit U9 transmission framing again after, become up intermediate-freuqncy signal UIFA by digital processing; Up intermediate-freuqncy signal UIFA transmits corresponding intermediate-freuqncy signal to port EM17 through after amplifying branching unit U6 amplification and closing the road by coupling unit U5, outputs to the power line through corresponding coupling unit.
And, digital processing element U2 comprises A-D converter U2.1, Digital Down Convert U2.2, Digital Up Convert U2.13, digital-to-analog converter U2.14 and N down going channel, a N data feedback channel, each down going channel comprises framing U2.3, chnnel coding U2.4, modulation U2.5, the Digital Up Convert U2.6 that connects successively, and each data feedback channel comprises that digital-to-analog converter U2.7, the A-D converter U2.8, Digital Down Convert U2.9, demodulation U2.10, the channel decoding U2.11 that connect successively conciliate frame U2.12;
A-D converter U2.1, Digital Down Convert U2.2 and each down going channel connect to form down link successively;
Each data feedback channel, Digital Up Convert U2.13 and digital-to-analog converter U2.14 connect to form up link successively.
And each digital processing element U7 comprises A-D converter U7.1, Digital Down Convert U7.2, demodulation U7.3, channel decoding U7.4, solution frame U7.5, Digital Up Convert U7.6, digital-to-analog converter U7.7, A-D converter U7.8, Digital Down Convert U7.9, framing U7.10, chnnel coding U7.11, modulation U7.12, Digital Up Convert U7.13 and digital-to-analog converter U7.14;
A-D converter U7.1, Digital Down Convert U7.2, demodulation U7.3, channel decoding U7.4, solution frame U7.5, Digital Up Convert U7.6 and digital-to-analog converter U7.7 connect to form down link successively;
A-D converter U7.8, Digital Down Convert U7.9, framing U7.10, chnnel coding U7.11, modulation U7.12, Digital Up Convert U7.13 and digital-to-analog converter U7.14 connect to form up link successively.
The invention provides a kind of wireless signal cheaply and cover scheme, utilize existing power line network, with wireless signal such as GSM(Global System for Mobile Communications, the global radio communication system), CDMA(Code Division Multiple Access, code division multiple access), WCDMA (Wideband Code Division Multiple Access, Wideband Code Division Multiple Access (WCDMA)), TDSCDMA(Time Division-Synchronous Code Division Multiple Acces, the code division multiple access that time-division is synchronous), LTE(Long Term Evolution, Long Term Evolution) etc. wireless signal and the ethernet signal of standard are transferred to the user area, when providing the wireless signal access service for the user, provide broadband access network, services such as wireless route.Have following advantage and good effect:
1) directly utilizes existing power line resource, solve telecom operators' engineering construction and coordinate problem difficult, that the engineering time is long;
2) wireless signal is introduced user side, solve the indoor wireless signal depth covering problem of telecom operators;
Close original supply of electric power when 3) adopting the electromagnetic coupled mode can avoid equipment to install, and fail safe and the rapidity of the installation of raising equipment;
4) directly utilize power line transmission, solve equipment power taking problem;
5) provide the transfer function of wireless signal and ethernet signal simultaneously, satisfy multiple communication need.
Description of drawings
Fig. 1 is the structured flowchart of the embodiment of the invention;
Fig. 2 is the structured flowchart of near-end unit in the embodiment of the invention;
Fig. 3 is the theory diagram of coupling unit in the embodiment of the invention;
Fig. 4 is the structured flowchart of far-end unit in the embodiment of the invention;
Fig. 5 is the theory diagram of converter unit U1 in the near-end unit of the embodiment of the invention:
Fig. 6 is the theory diagram of digital processing element U2 in the near-end unit of the embodiment of the invention:
Fig. 7 is the theory diagram that amplifies branching unit U3 in the near-end unit of the embodiment of the invention:
Fig. 8 is the theory diagram that amplifies branching unit U6 in the far-end unit of the embodiment of the invention;
Fig. 9 is the theory diagram of digital processing element U7 in the far-end unit of the embodiment of the invention;
Figure 10 is the theory diagram of converter unit U8 in the far-end unit of the embodiment of the invention.
Embodiment
Describe technical solution of the present invention in detail below in conjunction with drawings and Examples.
As Fig. 1, the present invention includes near-end unit 100, coupling unit 200 and distal portions 300, totally three parts.During concrete enforcement, the transmission of multichannel ethernet signal can be provided simultaneously, and namely near-end unit 100 provides output more than one tunnel, is provided with the output of N road, coupling unit 200 comprises that N corresponding coupling unit to be coupled on the different power lines, comprises N corresponding far-end unit in the distal portions (300).The number of concrete N can arrange as required, and embodiment establishes N=16, and namely near-end unit 100 provides 16 tunnel outputs, and coupling unit 200 comprises 16 coupling units, coupling unit 1 ... 16 are designated as 201 respectively ... 216; Accordingly, distal portions 300 comprises 16 far-end units, far-end unit 1 ... 16 are designated as 301 respectively ... 316.
Its annexation is:
Near-end unit 100 and each coupling unit 201 ... 216 connect coupling unit 201 respectively by metal medium (as: twisted-pair feeder) ... 216 and far-end unit 301 ... 316 connect one to one by power line.Article one, receive far-end unit behind the magnetic material of power line by coupling unit, couple a signal on the power line by the electromagnetic coupled mode.Can utilize existing power line network easily like this, realize transmission of wireless signals.
Its operation principle is:
Wireless signal (GSM/CDMA/WCDMA/TDSCDMA/LTE) enter near-end unit 100 by radio frequency cable from the base station, ethernet signal is transferred to near-end unit 100 by netting twine, and near-end unit 100 is transformed into baseband signal by frequency conversion and analog-to-digital conversion with radiofrequency signal.Near-end unit 100 with baseband signal and ethernet signal framing again after, by exporting intermediate-freuqncy signal after the analog-to-digital conversion.Intermediate-freuqncy signal is coupled on the power line by coupling unit 200.Far-end unit 300 is coupled out intermediate-freuqncy signal at power line, and is baseband signal and ethernet signal with intermediate-freuqncy signal solution frame.Baseband signal is transformed into radiofrequency signal after by digital-to-analogue conversion and frequency conversion, and the wireless signal access service is provided, and ethernet signal provides services such as broadband access network, wireless route simultaneously.
For the sake of ease of implementation, provide the circuit structure of near-end unit 100 among the embodiment, coupling unit 200 and distal portions 300 to be described as follows:
1, the near-end unit 100
As Fig. 2, near-end unit 100 comprises converter unit U1, digital processing element U2, N amplification branching unit U3, power supply unit U4.The amplification branching unit U3 of embodiment has 16.For ease of connecting signal, also be provided with each port EM1～EM16 and the port E1～E16 that is connected digital processing element U2 that branching unit U3 is respectively amplified in connection.
Its annexation is:
Converter unit U1, digital processing element U2 and respectively amplify branching unit U3 and connect to form uplink downlink respectively successively;
Power supply unit U4 connects other unit (converter unit U1, digital processing element U2 and respectively amplify branching unit U3) respectively, and energy is provided.
Its operation principle is:
In the down link, after wireless signal RF enters near-end unit 100, by converter unit U1 downlink radio-frequency signal DRF is converted to descending intermediate-freuqncy signal DIF, after descending intermediate-freuqncy signal DIF handles through digital processing element U2, be transformed to baseband signal, and with the ethernet signal that enters from port E1～E16 framing again after, becoming descending intermediate-freuqncy signal DIFA(embodiment by digital processing has 16 the tunnel).The descending intermediate-freuqncy signal DIFA in each road is transferred to port EM1～EM16 respectively through after corresponding amplification branching unit U3 amplification and closing the road.But the descending intermediate-freuqncy signal DIFA respective markers in each road is DIFA1～DIFA16.
In like manner, in the up link, but each road is UIFA1～UIFA16 from the up intermediate-freuqncy signal UIFA respective markers that port EM1～EM16 imports, and after amplifying through corresponding amplification branching unit U3 respectively, is transferred to digital processing element U2.Digital processing element U2 is converted to digital signal with up intermediate-freuqncy signal UIFA, and isolates baseband signal and ethernet signal.Wherein ethernet signal is transferred to port E1～E16, and baseband signal is converted to up intermediate-freuqncy signal UIF after digital processing.Converter unit U1 is up radiofrequency signal URF with up intermediate-freuqncy signal UIF frequency conversion, and adopts the mode of radio transmission to pass the base station back.
Power supply unit U4 obtains external energy by V+, V-two lines, and energy is provided for respectively converter unit U1, digital processing element U2 and amplification branching unit U3.
The Fr signal is that digital processing element U2 offers converter unit U1 among Fig. 2, is used for the clock reference signal of up-downgoing frequency conversion.
2, coupling unit 200
The near-end unit is connected by metal medium respectively with each coupling unit, and each coupling unit is connected by power line with the respective distal end unit.The operation principle of arbitrary coupling unit is identical in the coupling unit 200:
As Fig. 3, when descending, the intermediate-freuqncy signal of near-end unit 100 port EM1～EM16 enters respectively and connects coupling unit 201 ... in 216 the metal medium, enter far-end unit 301 through power line respectively ... 316; When up, far-end unit 301 ... 316 intermediate-freuqncy signals that provide by power line enter respectively and connect coupling unit 201 ... 216, insert near-end unit 100 port EM1～EM16 by the respective metal medium then.
The intermediate-freuqncy signal frequency of near-end unit 100 transmission is at several million to tens megahertzes.Intermediate-freuqncy signal is fast-changing signal, when itself and power line closely near the time because the energy that the electromagnetic induction principle power line can the coupling unit intermediate-freuqncy signal, thereby realize that intermediate-freuqncy signal transmits at power line.Close original supply of electric power when adopting this kind electromagnetic coupled mode can avoid equipment to install, and fail safe and the rapidity of the installation of raising equipment.
3, distal portions 300
As Fig. 4, each far-end unit comprises coupling unit U5, amplifies branching unit U6, digital processing element U7, converter unit U8, Ethernet processing unit U9 and power supply unit U10 in the distal portions 300, and coupling unit U5 realizes coupling by capacitance component.For ease of connecting signal, also be provided with the port that connects power line.
Its annexation is:
Coupling unit U5, amplification branching unit U6, digital processing element U7 and converter unit U8 connect to form uplink downlink successively;
Power supply unit U10 connects amplification branching unit U6, digital processing element U7, converter unit U8 and Ethernet processing unit U9 respectively, and energy is provided;
Digital processing element U7 connects Ethernet processing unit U9.
Each far-end unit operation principle is:
If this far-end unit connects through corresponding coupling unit (201 ... the port of power line one of 216) is designated as EM17, in the down link, by coupling unit U5 intermediate-freuqncy signal is separated from the power line that is connected to EM17, through amplifying branching unit U6 amplification and isolating descending intermediate-freuqncy signal DIFA.Digital processing element U7 is converted to digital signal with descending intermediate-freuqncy signal DIFA, and isolates baseband signal and ethernet signal.Wherein ethernet signal is transferred to Ethernet processing unit U9, and baseband signal is converted to descending intermediate-freuqncy signal DIF through after the digital processing.Converter unit U8 is radiofrequency signal with descending intermediate-freuqncy signal DIF frequency conversion, is transmitted in the free space by antenna.
In the up link, after wireless signal RF enters far-end unit, by converter unit U8 up radiofrequency signal is converted to up intermediate-freuqncy signal UIF, after up intermediate-freuqncy signal UIF handles through digital processing element U7, be transformed to baseband signal, and with the ethernet signal that comes from Ethernet processing unit U9 transmission framing again after, become up intermediate-freuqncy signal UIFA by digital processing.Up intermediate-freuqncy signal UIFA transmits corresponding intermediate-freuqncy signal to port EM17 through after amplifying branching unit U6 amplification and closing the road by coupling unit U5, outputs to through corresponding coupling unit (201 ... one of 216) power line.
Ethernet processing unit U9 can provide broadband access network by Ethernet or wireless lan (wlan), functions such as wireless route.
Power supply unit U10 provides energy for respectively amplification branching unit U6, digital processing element U7, converter unit U8 and Ethernet processing unit U9.
The Fr signal is that digital processing element U7 offers converter unit U8, is used for the clock reference signal of up-downgoing frequency conversion.
For ease of implementing reference, provide further that the circuit structure of each submodule is described as follows among the embodiment:
1, the submodule in the near-end unit 100
1-1) converter unit U1
As Fig. 5, converter unit U1 comprises duplexer U1.1, amplifier (AMP) U1.2, radio frequency Surface Acoustic Wave Filter (RF SAW) U1.3, frequency mixer U1.4, phase-locked loop (PLL) U1.5, amplifier (AMP) U1.6, radio frequency Surface Acoustic Wave Filter (RF SAW) U1.7 and frequency mixer U1.8.
Its annexation is:
Duplexer U1.1, amplifier (AMP) U1.2, radio frequency Surface Acoustic Wave Filter (RF SAW) U1.3 and frequency mixer U1.4 connect to form down link successively;
Duplexer U1.1, amplifier (AMP) U1.6, radio frequency Surface Acoustic Wave Filter (RF SAW) U1.7 and frequency mixer U1.8 connect to form up link successively;
Phase-locked loop (PLL) U1.5 is connected with frequency mixer U1.8 with frequency mixer U1.4 respectively;
Its operation principle is:
In the down link, the radiofrequency signal RF of reception is divided into downlink radio-frequency signal DRF and up radiofrequency signal URF through duplexer U1.1.Downlink radio-frequency signal DRF amplifies through amplifier (AMP) U1.2, after radio frequency Surface Acoustic Wave Filter (RF SAW) the U1.3 filtering, down-converts to descending intermediate-freuqncy signal DIF through frequency mixer U1.4.
In the up link, in like manner up intermediate-freuqncy signal UIF up-converts to up radiofrequency signal through frequency mixer U1.8, passing through (RF SAW) the U1.7 filtering of radio frequency Surface Acoustic Wave Filter and amplifier (AMP) U1.6 again amplifies, obtain up radiofrequency signal URF, up radiofrequency signal URF and downlink radio-frequency signal DRF close the road through duplexer U1.1.
Phase-locked loop (PLL) U1.5 is for generation of local oscillation signal, and for frequency mixer U1.4 and U1.8 provide local oscillation signal, the reference signal of this phase-locked loop (PLL) comes from the clock reference signal Fr of digital processing element U2.
1-2) digital processing element U2
As Fig. 6, digital processing element U2 comprises 1 A-D converter (ADC) U2.1, Digital Down Convert (DDC) U2.2, Digital Up Convert (DUC) U2.13, digital-to-analog converter (DAC) U2.14 and N down going channel, a N data feedback channel, each down going channel comprises framing U2.3, chnnel coding U2.4, modulation U2.5, the Digital Up Convert U2.6 that connects successively, and each data feedback channel comprises that digital-to-analog converter U2.7, the A-D converter U2.8, Digital Down Convert U2.9, demodulation U2.10, the channel decoding U2.11 that connect successively conciliate frame U2.12.Therefore, framing (signal multiplexing) U2.3, chnnel coding U2.4, modulation U2.5, Digital Up Convert (DUC) U2.6, digital-to-analog converter (DAC) U2.7, A-D converter (ADC) U2.8, Digital Down Convert (DDC) U2.9, demodulation U2.10, channel decoding U2.11 reconciliation frame (signal separation) U2.12 respectively have N among the digital processing element U2.
Its annexation is:
A-D converter U2.1, Digital Down Convert U2.2 and each down going channel connect to form down link successively, namely for one road signal, A-D converter (ADC) U2.1, Digital Down Convert (DDC) U2.2, framing U2.3, chnnel coding U2.4, modulation U2.5, Digital Up Convert (DUC) U2.6, digital-to-analog converter (DAC) U2.7 connect to form down link successively.
Each data feedback channel, Digital Up Convert U2.13 and digital-to-analog converter U2.14 connect to form up link successively, namely for one road signal, A-D converter (ADC) U2.8, Digital Down Convert (DDC) U2.9, demodulation U2.10, channel decoding U2.11, solution frame U2.12, Digital Up Convert (DUC) U2.13 and digital-to-analog converter (DAC) U2.14 connect to form up link successively.
Its operation principle is:
In the down link, be converted to digital signal behind descending intermediate-freuqncy signal DIF process A-D converter (ADC) U2.1, U2.2 is converted to baseband signal with digital signal by Digital Down Convert (DDC).By framing U2.3, with baseband signal and port E1 ... the ethernet signal of one of E16 input is framing again, carry out chnnel coding by chnnel coding U2.4 at the power line physical characteristic, carry out the OFDM modulation by the modulation U2.5 signal of framing again, U2.6 is converted to digital signal by Digital Up Convert (DUC), and U2.7 is converted to descending intermediate-freuqncy signal DIFA by digital-to-analog converter (DAC).
In the up link, in like manner be converted to digital signal behind up intermediate-freuqncy signal UIFA process A-D converter (ADC) U2.8, U2.9 is converted to baseband signal with digital signal by Digital Down Convert (DDC), after demodulation U2.10 and the processing of channel decoding U2.11 signal, isolate ethernet signal and baseband signal by separating frame U2.12.Baseband signal is converted to digital signal by Digital Up Convert (DUC) U2.13, and U2.14 is converted to up intermediate-freuqncy signal UIF by digital-to-analog converter (DAC).
1-3) amplify branching unit U3
As Fig. 7, each amplifies branching unit U3 and comprises amplifier (AMP) U3.1, amplifier (AMP) U3.2 and duplexer U3.3.
Its annexation is:
Amplifier (AMP) U3.1 and duplexer U3.3 connect to form down link.
Amplifier (AMP) U3.2 and duplexer U3.3 connect to form up link.
Its operation principle is:
In the down link, descending intermediate-freuqncy signal DIFA amplifies by amplifier (AMP) U3.1, closes one of EM1～EM16 port that road gained intermediate-freuqncy signal outputs to near-end unit 100 by duplexer U3.3.
In the up link, the intermediate-freuqncy signal that one of EM1～EM16 port by near-end unit 100 enters is separated the up intermediate-freuqncy signal UIFA of output through duplexer U3.3, and amplifies by amplifier (AMP) U3.2.
2, the submodule in the far-end unit
The submodule specification of each far-end unit is as follows in the distal portions 300:
1-1) amplify branching unit U6
As Fig. 8, amplify branching unit U6 and comprise amplifier (AMP) U6.1, amplifier (AMP) U6.2 and mixer U6.3.
Its annexation is:
Amplifier (AMP) U6.1 and duplexer U6.3 connect to form down link.
Amplifier (AMP) U6.2 and duplexer U6.3 connect to form up link.
Its operation principle is:
In the down link, intermediate-freuqncy signal by coupling unit U5 separation, isolate descending intermediate-freuqncy signal DIFA and up intermediate-freuqncy signal UIFA through duplexer U6.3, wherein descending intermediate-freuqncy signal DIFA amplifies by amplifier (AMP) U6.1, by outputing to digital processing element U7 behind the duplexer U6.3.
In the up link, up intermediate-freuqncy signal UIFA amplifies by amplifier (AMP) U6.2, close the road by duplexer U6.3 and descending intermediate-freuqncy signal DIFA after, finally be transferred to coupling unit U5.
1-2) digital processing element U7
As Fig. 9, digital processing element U7 comprises A-D converter (ADC) U7.1, Digital Down Convert (DDC) U7.2, demodulation U7.3, channel decoding U7.4, solution frame U7.5, Digital Up Convert (DUC) U7.6, digital-to-analog converter (DAC) U7.7, A-D converter (ADC) U7.8, Digital Down Convert (DDC) U7.9, framing U7.10, chnnel coding U7.11, modulation U7.12, Digital Up Convert (DUC) U7.13 and digital-to-analog converter (DAC) U7.14.
Its annexation is:
A-D converter (ADC) U7.1, Digital Down Convert (DDC) U7.2, demodulation U7.3, channel decoding U7.4, solution frame U7.5, Digital Up Convert (DUC) U7.6 and digital-to-analog converter (DAC) U7.7 connect to form down link successively.
A-D converter (ADC) U7.8, Digital Down Convert (DDC) U7.9, framing U7.10, chnnel coding U7.11, modulation U7.12, Digital Up Convert (DUC) U7.13 and digital-to-analog converter (DAC) U7.14 connect to form up link successively.
Its operation principle is:
In the down link, be converted to digital signal behind descending intermediate-freuqncy signal DIFA process A-D converter (ADC) U7.1, U7.2 is converted to baseband signal with digital signal by Digital Down Convert (DDC), after demodulation U7.3 and the processing of channel decoding U7.4 signal, isolate ethernet signal and baseband signal by separating frame U7.5.Baseband signal is converted to digital signal by Digital Up Convert (DUC) U7.6, and U7.7 is converted to descending intermediate-freuqncy signal DIFA by digital-to-analog converter (DAC).
In the up link, in like manner be converted to digital signal behind up intermediate-freuqncy signal UIF process A-D converter (ADC) U7.8, U7.9 is converted to baseband signal with digital signal by Digital Down Convert (DDC).By framing U7.10, with baseband signal and ethernet signal framing again, carry out chnnel coding by chnnel coding U7.11 at the power line physical characteristic, carry out the OFDM modulation by the modulation U7.12 signal of framing again, U7.13 is converted to digital signal by Digital Up Convert (DUC), and U7.14 is converted to up intermediate-freuqncy signal UIFA by digital-to-analog converter (DAC).
Like this, the framing U2.3 that the ethernet signal that is entered by external interface and the baseband signal after the wireless signal digitlization enter digital processing element U2 simultaneously, framing U2.3 according to predetermined protocol to two kinds of signals framing again, and by power line transmission to far-end unit.Digital processing element U7 in each far-end unit carries out signal solution frame according to predetermined protocol, isolates ethernet signal, thereby realizes the transmission of ethernet signal.
1-3) converter unit U8
As Figure 10, converter unit U8 comprises duplexer U8.1, amplifier (AMP) U8.2, radio frequency Surface Acoustic Wave Filter (RF SAW) U8.3, frequency mixer U8.4, phase-locked loop (PLL) U8.5, amplifier (AMP) U8.6, radio frequency Surface Acoustic Wave Filter (RF SAW) U8.7 and frequency mixer U8.8.
Its annexation is:
Duplexer U8.1, amplifier (AMP) U8.2, radio frequency Surface Acoustic Wave Filter (RF SAW) U8.3 and frequency mixer U8.4 connect to form down link successively;
Duplexer U8.1, amplifier (AMP) U8.6, radio frequency Surface Acoustic Wave Filter (RF SAW) U8.7 and frequency mixer U8.8 connect to form up link successively;
Phase-locked loop (PLL) U8.5 is connected with frequency mixer U8.8 with frequency mixer U8.4 respectively.
Its operation principle is:
In the down link, descending intermediate-freuqncy signal DIF up-converts to downlink radio-frequency signal DRF through frequency mixer U8.4, pass through radio frequency Surface Acoustic Wave Filter (RF SAW) U8.3 filtering again, amplify through amplifier (AMP) U8.2, be transmitted in the free space by antenna after process duplexer U8.1 and up intermediate-freuqncy signal URF close the road.
In the up link, the radiofrequency signal RF of antenna reception in like manner isolates up radiofrequency signal URF and downlink radio-frequency signal DRF through duplexer U8.1.Up radiofrequency signal URF amplifies through amplifier (AMP) U8.2, after radio frequency Surface Acoustic Wave Filter (RF SAW) the U8.3 filtering, down-converts to up intermediate-freuqncy signal UIF through frequency mixer U8.4.
Phase-locked loop (PLL) U8.5 is for generation of local oscillation signal, and for frequency mixer U8.4 and U8.8 provide local oscillation signal, the reference signal of this phase-locked loop (PLL) comes from the clock reference signal Fr of digital processing element U7.The clock reference signal of digital processing element U7 is consistent with the clock reference signal that digital processing element U2 provides.
Power supply unit U4,, Ethernet processing unit U9 and power supply unit U10 can adopt matured product of the prior art, the present invention will not give unnecessary details.
Specific embodiment described herein only is that the present invention's spirit is illustrated.Those skilled in the art can make various modifications or replenish or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Claims (6)
1. the connecting system based on power line transmission wireless signal and ethernet signal is characterized in that: comprise near-end unit, coupling unit and distal portions; The near-end unit provides output more than one tunnel, and establishing the output number is the N road, and coupling unit comprises N corresponding coupling unit, comprises N corresponding far-end unit in the distal portions,
The near-end unit comprises that digital processing element U2, N of converter unit U1, connection ethernet signal is amplified branching unit U3 and power supply unit U4; Converter unit U1 is connected with digital processing element U2, and digital processing element U2 amplifies branching unit U3 and is connected successively respectively with each, forms uplink downlink; Power supply unit U4 connects converter unit U1, digital processing element U2 respectively and respectively amplifies branching unit U3;
The near-end unit is connected by metal medium respectively with each coupling unit, and each coupling unit is connected by power line with the respective distal end unit;
Each far-end unit comprises coupling unit U5, amplifies branching unit U6, digital processing element U7, converter unit U8, Ethernet processing unit U9 and power supply unit U10 in the distal portions; Coupling unit U5, amplification branching unit U6, digital processing element U7 are connected successively with converter unit U8, form uplink downlink; Power supply unit U10 connects amplification branching unit U6, digital processing element U7, converter unit U8 and Ethernet processing unit U9 respectively, and digital processing element U7 connects Ethernet processing unit U9.
2. according to the described connecting system based on power line transmission wireless signal and ethernet signal of claim 1, it is characterized in that: in the near-end unit, arrange and connect the port EM1～EMN and the port E1～EN that is connected digital processing element U2 that respectively amplifies branching unit U3 respectively
In the down link, after wireless signal RF enters near-end unit 100, by converter unit U1 downlink radio-frequency signal DRF is converted to descending intermediate-freuqncy signal DIF; Descending intermediate-freuqncy signal DIF is transformed to baseband signal after handling through digital processing element U2, and with the ethernet signal that enters from port E1～EN framing again after, become descending intermediate-freuqncy signal DIFA by digital processing; The descending intermediate-freuqncy signal DIFA in each road is transferred to port EM1～EMN respectively through after corresponding amplification branching unit U3 amplification and closing the road;
In the up link, each road is transferred to digital processing element U2 after the up intermediate-freuqncy signal UIFA of port EM1～EMN input amplifies through corresponding amplification branching unit U3; Digital processing element U2 is converted to digital signal with up intermediate-freuqncy signal UIFA, and isolates baseband signal and ethernet signal, and wherein ethernet signal is transferred to port E1～EN, and baseband signal is converted to up intermediate-freuqncy signal UIF after digital processing; Converter unit U1 is up radiofrequency signal URF with up intermediate-freuqncy signal UIF frequency conversion, and adopts the mode of radio transmission to pass the base station back.
3. according to the described connecting system based on power line transmission wireless signal and ethernet signal of claim 1, it is characterized in that: coupling unit coupling electrical power line and metal medium, and adopt the fastening power line of magnetic material and metal medium.
4. according to the described connecting system based on power line transmission wireless signal and ethernet signal of claim 1, it is characterized in that: in each far-end unit, the port EM17 that connects power line is set;
In the down link, by coupling unit U5 intermediate-freuqncy signal is separated from the power line that is connected to EM17, through amplifying branching unit U6 amplification and isolating descending intermediate-freuqncy signal DIFA; Digital processing element U7 is converted to digital signal with descending intermediate-freuqncy signal DIFA, and isolates baseband signal and ethernet signal, and wherein ethernet signal is transferred to Ethernet processing unit U9, and baseband signal is converted to descending intermediate-freuqncy signal DIF through after the digital processing; Converter unit U8 is radiofrequency signal with descending intermediate-freuqncy signal DIF frequency conversion, is transmitted in the free space by antenna;
In the up link, after wireless signal RF enters far-end unit, by converter unit U8 up radiofrequency signal is converted to up intermediate-freuqncy signal UIF; Up intermediate-freuqncy signal UIF is transformed to baseband signal after handling through digital processing element U7, and with the ethernet signal that comes from Ethernet processing unit U9 transmission framing again after, become up intermediate-freuqncy signal UIFA by digital processing; Up intermediate-freuqncy signal UIFA transmits corresponding intermediate-freuqncy signal to port EM17 through after amplifying branching unit U6 amplification and closing the road by coupling unit U5, outputs to the power line through corresponding coupling unit.
5. according to claim 1 or 2 or 3 or 4 described connecting systems based on power line transmission wireless signal and ethernet signal, it is characterized in that:
Digital processing element U2 comprises A-D converter U2.1, Digital Down Convert U2.2, Digital Up Convert U2.13, digital-to-analog converter U2.14 and N down going channel, a N data feedback channel, each down going channel comprises framing U2.3, chnnel coding U2.4, modulation U2.5, the Digital Up Convert U2.6 that connects successively, and each data feedback channel comprises that digital-to-analog converter U2.7, the A-D converter U2.8, Digital Down Convert U2.9, demodulation U2.10, the channel decoding U2.11 that connect successively conciliate frame U2.12;
A-D converter U2.1, Digital Down Convert U2.2 and each down going channel connect to form down link successively;
Each data feedback channel, Digital Up Convert U2.13 and digital-to-analog converter U2.14 connect to form up link successively.
6. according to claim 1 or 2 or 3 or 4 described connecting systems based on power line transmission wireless signal and ethernet signal, it is characterized in that:
Each digital processing element U7 comprises A-D converter U7.1, Digital Down Convert U7.2, demodulation U7.3, channel decoding U7.4, solution frame U7.5, Digital Up Convert U7.6, digital-to-analog converter U7.7, A-D converter U7.8, Digital Down Convert U7.9, framing U7.10, chnnel coding U7.11, modulation U7.12, Digital Up Convert U7.13 and digital-to-analog converter U7.14;
A-D converter U7.1, Digital Down Convert U7.2, demodulation U7.3, channel decoding U7.4, solution frame U7.5, Digital Up Convert U7.6 and digital-to-analog converter U7.7 connect to form down link successively;
A-D converter U7.8, Digital Down Convert U7.9, framing U7.10, chnnel coding U7.11, modulation U7.12, Digital Up Convert U7.13 and digital-to-analog converter U7.14 connect to form up link successively.
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| CN106160792A (en) * | 2015-04-10 | 2016-11-23 | 中国电信股份有限公司 | Antenna assembly and spaced antenna room subsystem |
| CN106162670A (en) * | 2015-04-10 | 2016-11-23 | 中国电信股份有限公司 | Indoor cellular system and data transmission method, base station equipment and antenna assembly |
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| CN106162945A (en) * | 2015-04-10 | 2016-11-23 | 中国电信股份有限公司 | Honeycomb base station device and data transmission method, communication equipment and communication system |
| CN106341162A (en) * | 2015-07-07 | 2017-01-18 | 华为技术有限公司 | Communication method and equipment |
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| WO2017185732A1 (en) * | 2016-04-29 | 2017-11-02 | 中兴通讯股份有限公司 | Distributed base station system |
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| CN108207003A (en) * | 2016-12-20 | 2018-06-26 | 中兴通讯股份有限公司 | Wireless signal sending, receiving method and device, wireless transmitter |
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