CN103327508B - Based on the connecting system of power line transmitting wireless signals and ethernet signal - Google Patents
Based on the connecting system of power line transmitting wireless signals and ethernet signal Download PDFInfo
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Abstract
Based on a connecting system for power line transmitting wireless signals and ethernet signal, comprise near-end unit, coupling unit and distal portions; Near-end unit provides a road to export above, and establishing output number is N road, and coupling unit comprises a corresponding N coupling unit, and distal portions comprises a corresponding N far-end unit. Radiofrequency signal and ethernet signal are transformed to intermediate-freuqncy signal by near-end unit, and be coupled on power line by coupling unit, is ultimately delivered to far-end unit. Intermediate-freuqncy signal is reduced into radiofrequency signal and ethernet signal by far-end unit, and the services such as wireless signal access, broadband access network, wireless routing are provided respectively. The present invention utilizes existing power line resource, solves telecom operators' engineering construction and coordinates difficulty, the problem that engineering time is long; Provide Ethernet data service at the indoor radio signal degree of depth covering problem that solves telecom operators simultaneously; Adopt electromagnetic coupled that signal transmission is coupled on power line, guarantee equipment does not affect original supply of electric power while installation.
Description
Technical field
The present invention relates to the connecting system of a kind of transmitting wireless signals and ethernet signal, refer to especially a kind of connecting system that utilizes power line to carry out above-mentioned two kinds of signals transmission.
Background technology
Data statistics shows, more than 70% wireless data service results from indoor. Along with increasing substantially of Chinese 3G subscription, data service income proportion is more and more higher. For portfolio in better absorption chamber, must improve indoor coverage of signal quality, to there being the room area of data traffic requirement to carry out the indoor covering of the degree of depth.
Along with improving constantly of citizen's environmental consciousness, health perception, wireless signal enters community, sets up exterior aerial, and property is coordinated very difficult. Because 3G standard frequency is high, be subject to body of wall to stop that seriously penetration loss is large, rely on macro station signal or corridor signal seepage to be difficult to reach good indoor coverage effect. The problem covering for solving the indoor degree of depth, can adopt the transmission mediums such as coaxial cable, optical fiber, twisted-pair feeder to realize transmission of wireless signals, but not all application scenarios all exists these cables, even if again lay corresponding cable, also need in the face of coordinating the large problem of difficulty. As ubiquitous power line network, can more effectively solve the problem that lacks transmission medium, solve more rapidly wireless signal covering problem.
Power line carrier communication (PLC) is using power line as information transfer channel, realizes 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 electric current, then utilizes power line transmission, and the modem of receiving information decomposes high-frequency signal out from electric current again.
Summary of the invention
The technical problem to be solved in the present invention, comprise the problem of 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 of indoor coverage of signal.
Technical scheme of the present invention is a kind of connecting system based on power line transmitting wireless signals and ethernet signal: comprise near-end unit, coupling unit and distal portions; Near-end unit provides a road to export above, and establishing output number is N road, and coupling unit comprises a corresponding N coupling unit, and distal portions comprises a corresponding N far-end unit,
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 is connected respectively successively with each amplification branching unit U3, composition uplink downlink; Power supply unit U4 connects respectively converter unit U1, digital processing element U2 and respectively amplifies branching unit U3;
Near-end unit is connected by metal medium respectively with each coupling unit, and each coupling unit is connected by power line with respective distal end unit;
In distal portions, 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; Coupling unit U5, amplification branching unit U6, digital processing element U7 are connected successively with converter unit U8, composition uplink downlink; Power supply unit U10 connects respectively amplification branching unit U6, digital processing element U7, converter unit U8 and Ethernet processing unit U9, and digital processing element U7 connects Ethernet processing unit U9.
And, in near-end unit, the port EM1～EMN that connects respectively each amplification branching unit U3 and the port E1～EN that is connected digital processing element U2 are set,
In downlink, wireless signal RF enters behind 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 through digital processing element U2 process after be transformed to baseband signal, and with the ethernet signal entering from port E1～EN again framing, become descending intermediate-freuqncy signal DIFA by digital processing; The descending intermediate-freuqncy signal DIFA in each road, after corresponding amplification branching unit U3 amplifies Ji He road, is transferred to respectively port EM1～EMN;
In up-link, the up intermediate-freuqncy signal UIFA that each road is inputted through port EM1～EMN, after corresponding amplification branching unit U3 amplifies, is transferred to digital processing element U2; Up intermediate-freuqncy signal UIFA is converted to data signal by digital processing element U2, and isolate 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 by up intermediate-freuqncy signal UIF frequency conversion, and adopts the mode of radio transmission to pass 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 downlink, by coupling unit U5, intermediate-freuqncy signal is separated from be connected to the power line of EM17, amplified and isolate descending intermediate-freuqncy signal DIFA through amplifying branching unit U6; Descending intermediate-freuqncy signal DIFA is converted to data signal by digital processing element U7, and isolate 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 after digital processing; Converter unit U8 is radiofrequency signal by descending intermediate-freuqncy signal DIF frequency conversion, by antenna transmission in free space;
In up-link, wireless signal RF enters after 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 digital processing element U7 processes, and with the ethernet signal coming from Ethernet processing unit U9 transmission again framing, become up intermediate-freuqncy signal UIFA by digital processing; Up intermediate-freuqncy signal UIFA amplifies behind Ji He road through amplifying branching unit U6, transmits corresponding intermediate-freuqncy signal to port EM17 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, the chnnel coding U2.4, modulation U2.5, the Digital Up Convert U2.6 that connect 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 downlink 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 downlink 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 one wireless signal covering cheaply scheme, utilize existing power line network, by wireless signal such as GSM(GlobalSystemforMobileCommunications, global radio communication system), CDMA(CodeDivisionMultipleAccess, CDMA), WCDMA (WidebandCodeDivisionMultipleAccess, WCDMA), TDSCDMA(TimeDivision-SynchronousCodeDivisionMultipleAcce s, the CDMA that time-division is synchronous), LTE(LongTermEvolution, Long Term Evolution) etc. wireless signal and the ethernet signal of standard be transferred to user area, when providing wireless signal access service for user, broadband access network is provided, the services such as wireless routing. there is following advantages and good effect:
1) directly utilize existing power line resource, solve telecom operators' engineering construction and coordinate problem difficult, that the engineering time is long;
2) wireless signal is introduced to user side, solve the indoor radio signal degree of depth covering problem of telecom operators;
3) while adopting electromagnetic coupled mode can avoid equipment to install, close original supply of electric power, and security and the rapidity of the installation of raising equipment;
4) directly utilize power line transmission, solve equipment power-extracting problem;
5) provide the transfer function of wireless signal and ethernet signal simultaneously, meet multiple communication need.
Brief description of the drawings
Fig. 1 is the structured flowchart of the embodiment of the present invention;
Fig. 2 is the structured flowchart of near-end unit in the embodiment of the present invention;
Fig. 3 is the theory diagram of coupling unit in the embodiment of the present invention;
Fig. 4 is the structured flowchart of far-end unit in the embodiment of the present invention;
Fig. 5 is the theory diagram of converter unit U1 in the near-end unit of the embodiment of the present invention:
Fig. 6 is the theory diagram of digital processing element U2 in the near-end unit of the embodiment of the present invention:
Fig. 7 is the theory diagram that amplifies branching unit U3 in the near-end unit of the embodiment of the present invention:
Fig. 8 is the theory diagram that amplifies branching unit U6 in the far-end unit of the embodiment of the present invention;
Fig. 9 is the theory diagram of digital processing element U7 in the far-end unit of the embodiment of the present invention;
Figure 10 is the theory diagram of converter unit U8 in the far-end unit of the embodiment of the present invention.
Detailed description of the invention
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. When concrete enforcement, the transmission of multichannel ethernet signal can be provided simultaneously, and near-end unit 100 provides a road to export above, is provided with the output of N road, coupling unit 200 comprises that a corresponding N coupling unit is to be coupled on different power lines, and distal portions (300) comprises a corresponding N far-end unit. The number of concrete N can arrange as required, and embodiment establishes N=16, and near-end unit 100 provides 16 tunnel outputs, and coupling unit 200 comprises 16 coupling units, coupling unit 1 ... 16 are designated as respectively 201 ... 216; Accordingly, distal portions 300 comprises 16 far-end units, far-end unit 1 ... 16 are designated as respectively 301 ... 316.
Its annexation is:
Near-end unit 100 and each coupling unit 201 ... 216 connect by metal medium (as: twisted-pair feeder) respectively, coupling unit 201 ... 216 and far-end unit 301 ... 316 connect one to one by power line. Article one, after the magnetic material of power line by coupling unit, receive far-end unit, couple a signal on power line by electromagnetic coupled mode. Can utilize easily so existing power line network, realize transmission of wireless signals.
Its operation principle is:
Wireless signal (GSM/CDMA/WCDMA/TDSCDMA/LTE) from base station enters near-end unit 100 by radio-frequency cable, ethernet signal arrives near-end unit 100 by network cable transmission, and near-end unit 100 is transformed into baseband signal by frequency conversion and analog-to-digital conversion by radiofrequency signal. Near-end unit 100 is by after baseband signal and ethernet signal again framing, by exporting intermediate-freuqncy signal after analog-to-digital conversion. Intermediate-freuqncy signal is coupled on power line by coupling unit 200. Far-end unit 300 is coupled out intermediate-freuqncy signal on power line, and is baseband signal and ethernet signal by intermediate-freuqncy signal solution frame. Baseband signal is transformed into radiofrequency signal after by digital-to-analogue conversion and frequency conversion, and wireless signal access service is provided, and ethernet signal provides the service such as broadband access network, wireless routing simultaneously.
For the sake of ease of implementation, provide the circuit structure of near-end unit 100 in embodiment, coupling unit 200 and distal portions 300 to be described as follows:
1, near-end unit 100
As Fig. 2, near-end unit 100 comprises that converter unit U1, digital processing element U2, N amplify branching unit U3, power supply unit U4. The amplification branching unit U3 of embodiment has 16. For ease of connecting signal, be also provided with the each port EM1～EM16 and the port E1～E16 that is connected digital processing element U2 that connect each amplification branching unit U3.
Its annexation is:
Converter unit U1, digital processing element U2 and respectively amplify branching unit U3 and connect to form successively respectively uplink downlink;
Power supply unit U4 connects respectively other unit (converter unit U1, digital processing element U2 and respectively amplify branching unit U3), and energy is provided.
Its operation principle is:
In downlink, wireless signal RF enters behind 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 after digital processing element U2 processes, be transformed to baseband signal, and with the ethernet signal entering from port E1～E16 again framing, become descending intermediate-freuqncy signal DIFA(embodiment You16 road by digital processing). The descending intermediate-freuqncy signal DIFA in each road, after corresponding amplification branching unit U3 amplifies Ji He road, is transferred to respectively port EM1～EM16. The descending intermediate-freuqncy signal DIFA in each road can respective markers be DIFA1～DIFA16.
In like manner, in up-link, each road can respective markers be UIFA1～UIFA16 from the up intermediate-freuqncy signal UIFA of port EM1～EM16 input, after corresponding amplification branching unit U3 amplifies, is transferred to digital processing element U2 respectively. Up intermediate-freuqncy signal UIFA is converted to data signal by digital processing element U2, and isolate 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 by up intermediate-freuqncy signal UIF frequency conversion, and adopts the mode of radio transmission to pass base station back.
Power supply unit U4 obtains external energy by V+, V-two lines, and energy is provided to respectively converter unit U1, digital processing element U2 and amplification branching unit U3.
In Fig. 2, Fr signal is that digital processing element U2 offers converter unit U1, for the clock reference signal of up-downgoing frequency conversion.
2, coupling unit 200
Near-end unit is connected by metal medium respectively with each coupling unit, and each coupling unit is connected by power line with respective distal end unit. In coupling unit 200, the operation principle of arbitrary coupling unit is identical:
As Fig. 3, when descending, the intermediate-freuqncy signal of near-end unit 100 port EM1～EM16 enters respectively butt coupling unit 201 ... in 216 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 butt coupling unit 201 ... 216, then by respective metal medium access near-end unit 100 port EM1～EM16.
The intermediate-freuqncy signal frequency that near-end unit 100 transmits is at several million to tens megahertzes. Intermediate-freuqncy signal is fast-changing signal, when itself and power line closely near time, due to electromagnetic induction principle power line can coupling unit intermediate-freuqncy signal energy, transmit on power line thereby realize intermediate-freuqncy signal. While adopting this kind of electromagnetic coupled mode can avoid equipment to install, close original supply of electric power, and security and the rapidity of the installation of raising equipment.
3, distal portions 300
As Fig. 4, in distal portions 300, 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, and coupling unit U5 realizes coupling by capacitance component. For ease of connecting signal, be also 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 respectively amplification branching unit U6, digital processing element U7, converter unit U8 and Ethernet processing unit U9, 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 ... one of 216) port of power line is designated as EM17, in downlink, by coupling unit U5, intermediate-freuqncy signal is separated from be connected to the power line of EM17, amplified and isolate descending intermediate-freuqncy signal DIFA through amplifying branching unit U6. Descending intermediate-freuqncy signal DIFA is converted to data signal by digital processing element U7, and isolate 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 after digital processing. Converter unit U8 is radiofrequency signal by descending intermediate-freuqncy signal DIF frequency conversion, by antenna transmission in free space.
In up-link, wireless signal RF enters after far-end unit, by converter unit U8, up radiofrequency signal is converted to up intermediate-freuqncy signal UIF, up intermediate-freuqncy signal UIF is after digital processing element U7 processes, be transformed to baseband signal, and with the ethernet signal coming from Ethernet processing unit U9 transmission again framing, become up intermediate-freuqncy signal UIFA by digital processing. Up intermediate-freuqncy signal UIFA amplifies behind Ji He road through amplifying branching unit U6, transmits corresponding intermediate-freuqncy signal to port EM17 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), the functions such as wireless routing.
Power supply unit U10 provides energy to respectively amplification branching unit U6, digital processing element U7, converter unit U8 and Ethernet processing unit U9.
Fr signal is that digital processing element U7 offers converter unit U8, for the clock reference signal of up-downgoing frequency conversion.
For ease of implementing reference, further provide the circuit structure of each submodule in embodiment to be described as follows:
1, the submodule in 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 SAW filter (RFSAW) U1.3, frequency mixer U1.4, phaselocked loop (PLL) U1.5, amplifier (AMP) U1.6, radio frequency SAW filter (RFSAW) U1.7 and frequency mixer U1.8.
Its annexation is:
Duplexer U1.1, amplifier (AMP) U1.2, radio frequency SAW filter (RFSAW) U1.3 and frequency mixer U1.4 connect to form downlink successively;
Duplexer U1.1, amplifier (AMP) U1.6, radio frequency SAW filter (RFSAW) U1.7 and frequency mixer U1.8 connect to form up-link successively;
Phaselocked loop (PLL) U1.5 is connected with frequency mixer U1.4 and frequency mixer U1.8 respectively;
Its operation principle is:
In downlink, 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 SAW filter (RFSAW) U1.3 filtering, down-converts to descending intermediate-freuqncy signal DIF through frequency mixer U1.4.
In up-link, in like manner up intermediate-freuqncy signal UIF up-converts to up radiofrequency signal through frequency mixer U1.8, passing through radio frequency SAW filter (RFSAW) U1.7 filtering and amplifier (AMP) U1.6 amplifies again, obtain up radiofrequency signal URF, up radiofrequency signal URF and downlink radio-frequency signal DRF close road through duplexer U1.1.
Phaselocked 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 phaselocked 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, the chnnel coding U2.4, modulation U2.5, the Digital Up Convert U2.6 that connect 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, in digital processing element U2, 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.
Its annexation is:
A-D converter U2.1, Digital Down Convert U2.2 and each down going channel connect to form downlink successively, for a 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 downlink successively.
Each data feedback channel, Digital Up Convert U2.13 and digital-to-analog converter U2.14 connect to form up-link successively, for a 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 downlink, descending intermediate-freuqncy signal DIF is converted to data signal after A-D converter (ADC) U2.1, and by Digital Down Convert (DDC), data signal is converted to baseband signal by U2.2. By framing U2.3, by baseband signal and port E1 ... the ethernet signal framing again of one of E16 input, carry out chnnel coding by chnnel coding U2.4 for power line physical characteristic, by modulation, the signal of framing is again carried out OFDM modulation by U2.5, by Digital Up Convert (DUC), U2.6 is converted to data signal, and by digital-to-analog converter (DAC), U2.7 is converted to descending intermediate-freuqncy signal DIFA.
In up-link, in like manner up intermediate-freuqncy signal UIFA is converted to data signal after A-D converter (ADC) U2.8, by Digital Down Convert (DDC), data signal is converted to baseband signal by U2.9, after processing by demodulation U2.10 and channel decoding U2.11 signal, isolate ethernet signal and baseband signal by separating frame U2.12. Baseband signal is converted to data signal by Digital Up Convert (DUC) U2.13, and by digital-to-analog converter (DAC), U2.14 is converted to up intermediate-freuqncy signal UIF.
1-3) amplify branching unit U3
As Fig. 7, each amplification branching unit U3 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 downlink.
Amplifier (AMP) U3.2 and duplexer U3.3 connect to form up-link.
Its operation principle is:
In downlink, descending intermediate-freuqncy signal DIFA amplifies by amplifier (AMP) U3.1, closes road gained intermediate-freuqncy signal output to one of EM1～EM16 port of near-end unit 100 by duplexer U3.3.
In up-link, the intermediate-freuqncy signal that one of EM1～EM16 port by near-end unit 100 enters, separates the up intermediate-freuqncy signal UIFA of output through duplexer U3.3, and amplifies by amplifier (AMP) U3.2.
2, the submodule in far-end unit
In distal portions 300, the submodule specification of each far-end unit is as follows:
1-1) amplify branching unit U6
As Fig. 8, amplify branching unit U6 and comprise amplifier (AMP) U6.1, amplifier (AMP) U6.2 and combiner U6.3.
Its annexation is:
Amplifier (AMP) U6.1 and duplexer U6.3 connect to form downlink.
Amplifier (AMP) U6.2 and duplexer U6.3 connect to form up-link.
Its operation principle is:
In downlink, the intermediate-freuqncy signal separating by coupling unit U5, 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 after duplexer U6.3.
In up-link, up intermediate-freuqncy signal UIFA amplifies by amplifier (AMP) U6.2, closes behind road by duplexer U6.3 and descending intermediate-freuqncy signal DIFA, is finally 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 downlink 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 downlink, descending intermediate-freuqncy signal DIFA is converted to data signal after A-D converter (ADC) U7.1, by Digital Down Convert (DDC), data signal is converted to baseband signal by U7.2, after processing by demodulation U7.3 and channel decoding U7.4 signal, isolate ethernet signal and baseband signal by separating frame U7.5. Baseband signal is converted to data signal by Digital Up Convert (DUC) U7.6, and by digital-to-analog converter (DAC), U7.7 is converted to descending intermediate-freuqncy signal DIFA.
In up-link, in like manner up intermediate-freuqncy signal UIF is converted to data signal after A-D converter (ADC) U7.8, and by Digital Down Convert (DDC), data signal is converted to baseband signal by U7.9. By framing U7.10, by baseband signal and ethernet signal framing again, carry out chnnel coding by chnnel coding U7.11 for power line physical characteristic, by modulation, the signal of framing is again carried out OFDM modulation by U7.12, by Digital Up Convert (DUC), U7.13 is converted to data signal, and by digital-to-analog converter (DAC), U7.14 is converted to up intermediate-freuqncy signal UIFA.
Like this, the baseband signal after the ethernet signal being entered by external interface and wireless signal digitlization enters the framing U2.3 of digital processing element U2 simultaneously, and framing U2.3 to two kinds of signals framing again, and is transferred to far-end unit by power line according to predetermined protocol. 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 SAW filter (RFSAW) U8.3, frequency mixer U8.4, phaselocked loop (PLL) U8.5, amplifier (AMP) U8.6, radio frequency SAW filter (RFSAW) U8.7 and frequency mixer U8.8.
Its annexation is:
Duplexer U8.1, amplifier (AMP) U8.2, radio frequency SAW filter (RFSAW) U8.3 and frequency mixer U8.4 connect to form downlink successively;
Duplexer U8.1, amplifier (AMP) U8.6, radio frequency SAW filter (RFSAW) U8.7 and frequency mixer U8.8 connect to form up-link successively;
Phaselocked loop (PLL) U8.5 is connected with frequency mixer U8.4 and frequency mixer U8.8 respectively.
Its operation principle is:
In downlink, descending intermediate-freuqncy signal DIF up-converts to downlink radio-frequency signal DRF through frequency mixer U8.4, pass through again radio frequency SAW filter (RFSAW) U8.3 filtering, amplify through amplifier (AMP) U8.2, behind duplexer U8.1 and up intermediate-freuqncy signal URFHe road by antenna transmission in free space.
In up-link, in like manner the radiofrequency signal RF of antenna reception 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 SAW filter (RFSAW) U8.3 filtering, down-converts to up intermediate-freuqncy signal UIF through frequency mixer U8.4.
Phaselocked 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 phaselocked 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, it will not go into details in the present invention.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit. Those skilled in the art can make various amendments or supplement 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 (4)
1. the connecting system based on power line transmitting wireless signals and ethernet signal, is characterized in that: comprise near-end unit, couplingClose part and distal portions; Near-end unit provides a road to export above, and establishing output number is N road, and coupling unit comprises corresponding NIndividual coupling unit, distal portions comprises a corresponding N far-end unit,
Near-end unit comprises converter unit U1, connects digital processing element U2, N amplification branching unit U3 of ethernet signalWith power supply unit U4; Converter unit U1 is connected with digital processing element U2, digital processing element U2 and each amplification branching unitU3 connects respectively successively, composition uplink downlink; Power supply unit U4 connects respectively converter unit U1, digital processing element U2With each amplification branching unit U3;
In near-end unit, port EM1～EMN of connecting respectively each amplification branching unit U3 is set and is connected digital processing elementPort E1～EN of U2,
In downlink, wireless signal RF enters behind near-end unit 100, by converter unit U1 by downlink radio-frequency signal DRFBe converted to descending intermediate-freuqncy signal DIF; Descending intermediate-freuqncy signal DIF is transformed to baseband signal after digital processing element U2 processes,And with the ethernet signal entering from port E1～EN again framing, become descending intermediate-freuqncy signal DIFA by digital processing;The descending intermediate-freuqncy signal DIFA in each road after corresponding amplification branching unit U3 amplifies Ji He road, be transferred to respectively port EM1～EMN；
In up-link, each road is through the corresponding amplification branching unit of up intermediate-freuqncy signal UIFA process of port EM1～EMN inputU3 is transferred to digital processing element U2 after amplifying; Up intermediate-freuqncy signal UIFA is converted to numeral letter by digital processing element U2Number, and isolate baseband signal and ethernet signal, and wherein ethernet signal is transferred to port E1～EN, and baseband signal is through numberAfter word processing, be converted to up intermediate-freuqncy signal UIF; Converter unit U1 is up radiofrequency signal by up intermediate-freuqncy signal UIF frequency conversionURF, and adopt the mode of radio transmission to pass base station back;
Near-end unit is connected by metal medium respectively with each coupling unit, and each coupling unit and respective distal end unit pass through power lineConnect;
When descending, the intermediate-freuqncy signal of near-end unit port EM1～EMN enters respectively in the metal medium that connects each coupling unit,Enter far-end unit through power line respectively; When up, the intermediate-freuqncy signal that each far-end unit provides by power line, the respectively company of enteringThe coupling unit connecing, then by the port EM1～EMN of respective metal medium access near-end unit;
In distal portions, each far-end unit comprises coupling unit U5, amplifies branching unit U6, digital processing element U7, frequency conversionUnit U8, Ethernet processing unit U9 and power supply unit U10; Coupling unit U5, amplification branching unit U6, digital processing elementU7 is connected successively with converter unit U8, composition uplink downlink; Power supply unit U10 connects respectively amplification branching unit U6, numeralProcessing unit U7, converter unit U8 and Ethernet processing unit U9, digital processing element U7 connects Ethernet processing unit U9;
In each far-end unit, the port EM17 that connects power line is set;
In downlink, by coupling unit U5, intermediate-freuqncy signal is separated from be connected to the power line of EM17 to processAmplify branching unit U6 amplification and isolate descending intermediate-freuqncy signal DIFA; Digital processing element U7 is by descending intermediate-freuqncy signal DIFABe converted to data signal, and isolate baseband signal and ethernet signal, wherein ethernet signal is transferred to Ethernet processing unitU9, baseband signal is converted to descending intermediate-freuqncy signal DIF after digital processing; Converter unit U8 is by descending intermediate-freuqncy signal DIFFrequency conversion is radiofrequency signal, by antenna transmission in free space;
In up-link, wireless signal RF enters after far-end unit, by converter unit U8, up radiofrequency signal is converted to upIntermediate-freuqncy signal UIF; Up intermediate-freuqncy signal UIF through digital processing element U7 process after be transformed to baseband signal, and with from EthernetThe ethernet signal that processing unit U9 transmission comes after framing, becomes up intermediate-freuqncy signal UIFA by digital processing again; In upFrequently signal UIFA amplifies behind Ji He road through amplifying branching unit U6, transmits corresponding intermediate-freuqncy signal to port by coupling unit U5EM17, outputs to the power line through corresponding coupling unit.
2. the connecting system based on power line transmitting wireless signals and ethernet signal according to claim 1, is characterized in that: couplingClose element coupling power line and metal medium, and adopt the fastening power line of magnetic material and metal medium.
3. according to the connecting system based on power line transmitting wireless signals and ethernet signal described in claim 1 or 2, 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 U2.14With N down going channel, a N data feedback channel, each down going channel comprises framing U2.3, the chnnel coding U2.4, the tune that connect successivelyU2.5 processed, Digital Up Convert U2.6, each data feedback channel comprise successively the digital-to-analog converter U2.7, the A-D converter U2.8 that connect,Digital Down Convert U2.9, demodulation U2.10, channel decoding U2.11 conciliate frame U2.12;
A-D converter U2.1, Digital Down Convert U2.2 and each down going channel connect to form downlink successively;
Each data feedback channel, Digital Up Convert U2.13 and digital-to-analog converter U2.14 connect to form up-link successively.
4. according to the connecting system based on power line transmitting wireless signals and ethernet signal described in claim 1 or 2, it is characterized in that:Each digital processing element U7 comprise A-D converter U7.1, Digital Down Convert U7.2, demodulation U7.3, channel decoding U7.4,Separate frame U7.5, Digital Up Convert U7.6, digital-to-analog converter U7.7, A-D converter U7.8, Digital Down Convert U7.9, framingU7.10, 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 ConvertU7.6 and digital-to-analog converter U7.7 connect to form downlink successively;
A-D converter U7.8, Digital Down Convert U7.9, framing U7.10, chnnel coding U7.11, modulation U7.12, Digital Up ConvertU7.13 and digital-to-analog converter U7.14 connect to form up-link successively.
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| CN103580725A (en) * | 2013-10-16 | 2014-02-12 | 奥维通信股份有限公司 | Power transmission micropower distribution system |
| 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 |
| 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 |
| 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 |
| CN106162946B (en) * | 2015-04-10 | 2019-11-08 | 中国电信股份有限公司 | Cellular communication system and its data transmission method, equipment and communication system |
| CN106341162A (en) * | 2015-07-07 | 2017-01-18 | 华为技术有限公司 | Communication method and equipment |
| CN106714195A (en) * | 2015-11-13 | 2017-05-24 | 中兴通讯股份有限公司 | Signal transmission method, terminal side equipment and system side equipment |
| CN105704804A (en) * | 2016-01-06 | 2016-06-22 | 广东欧珀移动通信有限公司 | Wireless communication signal indoor gain device and method |
| CN107343328B (en) * | 2016-04-29 | 2022-03-01 | 中兴通讯股份有限公司 | Distributed base station system |
| CN106130854A (en) * | 2016-06-23 | 2016-11-16 | 北京东土科技股份有限公司 | Industrial process control system based on industry internet |
| CN108207003B (en) * | 2016-12-20 | 2022-11-29 | 中兴通讯股份有限公司 | Wireless signal transmitting and receiving method and device, and wireless transmitting and receiving device |
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| CN202261276U (en) * | 2011-07-06 | 2012-05-30 | 毛振刚 | Power line carrier transmission system |
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