CN103338059A - Photoelectric hybrid broadcast transmission method and photoelectric hybrid broadcast transmission device - Google Patents
Photoelectric hybrid broadcast transmission method and photoelectric hybrid broadcast transmission device Download PDFInfo
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Abstract
The invention provides a photoelectric hybrid broadcast transmission method which comprises the steps that S1, a broadcast transmission signal is generated or forwarded by a power line communication module according to a scheduled broadcast transmission standard, and coupled to a power line for transmission after analog front end processing; S2, the transmission signal in the power line is obtained by a signal relay module via a coupler, and converted into a current drive signal after the analog front end processing; a photo-communication module is driven; and S3, the photo-communication module drives luminance of an LED (light emitting diode) through the current signal, and forwards the received signal into a photo-communication link. The invention further provides a photoelectric hybrid broadcast transmission device for the method. The method and the device integrate power line communication and photo-communication seamlessly by adopting a generic technology, and provide high-speed and robust signal transmission and broadcast coverage by utilizing ubiquitousness, reliability and confidentiality of the power line communication and the photo-communication.
Description
Technical field
The invention belongs to communication technical field, particularly a kind of photoelectricity mixes broadcasting transmission method and device.
Background technology
Along with all-round popularization and the enforcement of digital technology in the multimedia broadcasting field, and information-based multimedia terminal is universal, multimedia broadcasting transmission technology and application also receive the increasing concern of industry, yet the further deflation of frequency spectrum resource becomes the bottleneck of radio multimedium broadcasting service development.Wireless light communication be a kind of be the emerging wireless communication technology of information transport vehicle with the light wave, have that transmission frequency bandwidth, message capacity are big, safety and environmental protection, no electromagnetic interference, need not to take advantage such as existing frequency spectrum resource, receive much concern in recent years.Industry thinks that the proposition of wireless light communication has been injected new growth vigor for the radio multimedium broadcasting service.
In wireless light communication, usually adopt LED as luminescent device, owing to itself need electric current to drive, can link together with power line naturally, therefore the combination of power line network and LED visible light communication can be regarded as the natural network of an one integrated mass in logic, wherein power line network is short-range backbone network, the big capacity metropolitan area network/wide area network of formations such as one end and optical fiber link to each other (FTTC even Fiber-To-The-Building have all been realized in now a lot of places, are easy to link with power line); The other end links to each other with LED or led array, information is launched by led array with the following line mode of wireless light communication, and can utilize power line or utilize the mode of wireless light communication to realize up information transmission equally.Power line communication (Power Line Communication, PLC) introducing of technology, satisfied the requirement of driven by power and information feed-in two aspects of LED visible light communication simultaneously, need not to install again cable and can finish short-range covering as communication link, have natural advantage such as other information transmission mode.
Utilize the ubiquitous property of power line and the technical advantage of wireless light communication, the communication system that power line communication is combined with optical communication the illumination with communicate by letter on all have the unrivaled advantage of conventional communication techniques, have the vast market prospect.With the signal source of power line network as the LED visible light communication, perhaps complement one another in conjunction with both advantages and carry out the transmission of broadband high-speed signal, set up robust efficient communication system, not only can save interconnection resource greatly, can form a kind of isomerism network of uniqueness simultaneously.
The present invention is with power line communication and seamless the merging into one of optical communication, utilize its ubiquitous property, reliability, confidentiality to provide signal transmission and the broadcasting of high speed robust to cover, have with low cost, cover extensive, strong characteristics such as reliable, in Internet of Things, wisdom city, wired home, have broad application prospects.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention is: how to provide a kind of photoelectricity to mix broadcasting transmission method and device.
(2) technical scheme
For addressing the above problem, the invention provides a kind of photoelectricity and mix the broadcasting transmission method, comprise step: S1, power line communication module produce or transmit broadcast transmission signal according to predetermined broadcasting transmission standard, after handling through AFE (analog front end), are coupled in the power circuit and transmit; S2, signal trunk module obtain to transmit signal in the power line by coupler, after handling through AFE (analog front end), again this signal are converted to current drive signal, drive optical communications module; S3, optical communications module utilize current signal driving LED luminosity, will receive the signal forwarding and enter optical communication link.
Preferably, predetermined broadcasting transmission standard described in the step S1 number comprises: DTMB, ABS-S, DVB-T, DVB-T2, DVB-S, DVB-S2, DVB-C, DVB-C2, CMMB, DAB broadcast standard, and the various patterns supported of IEEE1901 and ITU-T G.hn power line standard.
Preferably, AFE (analog front end) described in step S1 and the S2 is handled and can be carried out the pre-distortion compensated processing.
Preferably, described pre-distortion compensated is treated to numeric field pre-distortion compensated or analog domain pre-distortion compensated.
Preferably, on duty amass of the frequency response of the frequency response of described pre-distortion compensated processing and power line channel or visible light channel on each Frequency point is steady state value.Preferably, AFE (analog front end) can be carried out power adjustment or filtering operation in handling among step S1 and the S2.
Preferably, described power line communication module and optical communications module are all supported multiple-input and multiple-output.
Preferably, the multiple-input and multiple-output of described power line communication module comprises wavelength division multiplexing, spatial reuse.
Preferably, the multiple-input and multiple-output of described optical communications module comprises space diversity, spatial reuse and wave beam forming.
The present invention also provides a kind of photoelectricity to mix the broadcasting transmitting device, comprising: power line communication module, be used for producing or transmit broadcast transmission signal according to predetermined broadcasting transmission standard, and after handling through AFE (analog front end), be coupled in the power circuit and transmit; The signal trunk module is used for obtaining power line by coupler and transmits signal, after handling through AFE (analog front end), again this signal is converted to current drive signal, drives optical communications module; Optical communications module is used for utilizing current signal driving LED luminosity, will receive the signal forwarding and enter optical communication link.
(3) beneficial effect
A kind of photoelectricity provided by the invention mixes broadcasting transmission method and device, adopts common technology with power line communication and seamless the merging into one of optical communication, utilizes its ubiquitous property, reliability, confidentiality to provide signal transmission and the broadcasting of high speed robust to cover.That this system has is with low cost, cover extensive, strong characteristics such as reliable, has broad application prospects in Internet of Things, wisdom city, wired home.
Description of drawings
Fig. 1 is that the photoelectricity of the embodiment of the invention mixes broadcasting transmission method flow chart;
Fig. 2 is the system block diagram of the embodiment of the invention one;
Fig. 3 is the system block diagram of the embodiment of the invention two;
Fig. 4 is the system block diagram of the embodiment of the invention three;
Fig. 5 is the system block diagram of the embodiment of the invention four;
Fig. 6 is the system block diagram of the embodiment of the invention five;
Fig. 7 is that the photoelectricity of the embodiment of the invention mixes broadcasting transmitting device schematic diagram.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used for explanation the present invention, but are not used for limiting the scope of the invention.
Fig. 1 is that the photoelectricity that the present invention proposes mixes the flow chart of broadcasting transmission method, specifically may further comprise the steps:
S1, power line communication module produce or transmit broadcast transmission signal according to predetermined broadcasting transmission standard, after handling through AFE (analog front end), be coupled in the power circuit and transmit;
S2, signal trunk module obtain to transmit signal in the power line by coupler, after handling through AFE (analog front end), again this signal are converted to current drive signal, drive optical communications module;
S3, optical communications module utilize current signal driving LED luminosity, will receive the signal forwarding and enter optical communication link.
Predetermined broadcasting transmission standard described in the step S1 number comprises: the various patterns that broadcast standards such as DTMB, ABS-S, DVB-T, DVB-T2, DVB-S, DVB-S2, DVB-C, DVB-C2, CMMB, DAB are supported.
AFE (analog front end) described in step S1 and the S2 is handled and can be carried out the pre-distortion compensated processing.
Described pre-distortion compensated is treated to numeric field pre-distortion compensated or analog domain pre-distortion compensated.
The frequency response that described pre-distortion compensated is handled and the frequency response of power line channel or visible light channel on duty the amassing on each Frequency point is steady state value.
AFE (analog front end) also can be carried out power adjustment or filtering operation in handling among step S1, the S2.
Described power line communication module and optical communications module are all supported multiple-input and multiple-output (MIMO) technology.
The multiple-input and multiple-output of described power line communication module (MIMO) technology can comprise wavelength division multiplexing, spatial reuse.
The multiple-input and multiple-output of described optical communications module (MIMO) technology can comprise space diversity, spatial reuse and wave beam forming.
Embodiment one
With reference to figure 2, a kind of photoelectricity that embodiment 1 has provided the present invention's proposition mixes a kind of embodiment of broadcasting transmission method.
The signal of present embodiment adopts the multi-carrier mode of DTMB, in conjunction with characteristics of the present invention, utilize common technology with power line communication and seamless the merging into one of optical communication, because the ubiquitous property of power line and the robustness of optical communication can be used for the DTMB broadcasting under the complicated indoor environment.
S1, power line communication module produce or transmit broadcast transmission signal according to predetermined broadcasting transmission standard, after handling through AFE (analog front end), be coupled in the power circuit and transmit;
In the present embodiment, power line communication module produces broadcast transmission signal according to predetermined broadcasting transmission standard, transmitting of producing adopted the multi-carrier mode of DTMB, effectively sub-carrier number is 3780, adopt the 64QAM modulation, the LDPC code check is that 0.6, PN length is 420, interleave depth is 720, and the clean code check of system is 24.365Mbps.The power line communication frequency range is 2-10MHz.Be coupled in the power circuit after the processing such as the broadcast transmission signal process digital-to-analogue conversion that produces and transmit.
S2, signal trunk module obtain to transmit signal in the power line by coupler, after handling through AFE (analog front end), again this signal are converted to current drive signal, drive optical communications module;
In the present embodiment, the signal trunk module obtains to transmit signal in the power line by coupler, after filtering and power adjustment, this signal is converted to current drive signal, drives optical communications module.
S3, optical communications module utilize current signal driving LED luminosity, will receive the signal forwarding and enter optical communication link.
In the present embodiment, optical communications module utilizes current signal driving LED luminosity, the signal that receives is transmitted entered optical communication link.
Embodiment two
With reference to figure 3, a kind of photoelectricity that embodiment 2 has provided the present invention's proposition mixes a kind of embodiment of broadcasting transmission method.
The signal of present embodiment adopts the single carrier mode of DTMB, in conjunction with characteristics of the present invention, utilize common technology with power line communication and seamless the merging into one of optical communication, and added the operation of channel precompensation, improved reliability of information transmission, because the ubiquitous property of power line and the robustness of optical communication can be used for the DTMB broadcasting under the complicated indoor environment.
S1, power line communication module are transmitted broadcast transmission signal according to predetermined broadcasting transmission standard, after handling through AFE (analog front end), are coupled in the power circuit and transmit;
In the present embodiment, power line communication module is transmitted broadcast transmission signal according to predetermined broadcasting transmission standard, transmitting of transmitting adopted the single carrier mode of DTMB, adopt the 16QAM modulation, the LDPC code check is that 0.8, PN length is 595, and interleave depth is 720, the clean code check of system is 20.791Mbps, with the DTMB signal from radio frequency down-conversion to the power line communication frequency range.The DTMB signal is generally in the UHF/VHF frequency range, and the power line communication frequency range is 2-10MHz.Be coupled to after the processing such as the broadcast transmission signal process digital-to-analogue conversion of transmitting, analog domain pre-distortion compensated and transmit in the power circuit, wherein on duty amass of the frequency response of the frequency response of pre-distortion compensated processing and power line channel on each Frequency point is steady state value.
In the present embodiment, power line communication module is supported the MIMO technology, adopts wavelength-division multiplex technique to improve transmission rate.
S2, signal trunk module obtain to transmit signal in the power line by coupler, after handling through AFE (analog front end), again this signal are converted to current drive signal, drive optical communications module;
In the present embodiment, the signal trunk module obtains to transmit signal in the power line by coupler, through behind filtering, power adjustment and the numeric field pre-distortion compensated, this voltage signal is converted to current signal, drive optical communications module, wherein on duty amass of the frequency response of the frequency response of pre-distortion compensated processing and visible light channel on each Frequency point is steady state value.
S3, optical communications module utilize current signal driving LED luminosity, will receive the signal forwarding and enter optical communication link.
In the present embodiment, optical communications module utilizes current signal driving LED luminosity, by led array, adopts space multiplexing technique, improves transmission rate, the signal that receives is transmitted entered optical communication link.
Embodiment three
With reference to figure 4, a kind of photoelectricity that embodiment 3 has provided the present invention's proposition mixes a kind of embodiment of broadcasting transmission method.
The pattern that the signal of present embodiment adopts CMMB to support, in conjunction with characteristics of the present invention, utilize common technology with power line communication and seamless the merging into one of optical communication, and added the operation of channel precompensation, improved reliability of information transmission, because the ubiquitous property of power line and the robustness of optical communication can be used for the broadcasting of CMMB signal.
S1, power line communication module produce or transmit broadcast transmission signal according to predetermined broadcasting transmission standard, after handling through AFE (analog front end), be coupled in the power circuit and transmit;
In the present embodiment, power line communication module produces broadcast transmission signal according to predetermined broadcasting transmission standard, and transmitting of producing adopted the 4K pattern of CMMB, bandwidth is 8MHz, and effectively sub-carrier number is 3076, adopts the 16QAM modulation, the LDPC code check is that 0.6, CP length is 1/8 symbol lengths.Be coupled to after the processing such as the broadcast transmission signal process numeric field pre-distortion compensated that produces, digital-to-analogue conversion and transmit in the power circuit, wherein on duty amass of the frequency response of the frequency response of pre-distortion compensated processing and power line channel on each Frequency point is steady state value.The power line communication frequency range is 10-18MHz.
S2, signal trunk module obtain to transmit signal in the power line by coupler, after handling through AFE (analog front end), again this signal are converted to current drive signal, drive optical communications module;
In the present embodiment, the signal trunk module obtains to transmit signal in the power line by coupler, through behind filtering, power adjustment and the numeric field pre-distortion compensated, this voltage signal is converted to current signal, drive optical communications module, wherein on duty amass of the frequency response of the frequency response of pre-distortion compensated processing and visible light channel on each Frequency point is steady state value.
S3, optical communications module utilize current signal driving LED luminosity, will receive the signal forwarding and enter optical communication link.
In the present embodiment, optical communications module utilizes current signal driving LED luminosity, by led array, adopts space diversity reception to communicate, improves transmission reliability, the signal that receives is transmitted entered optical communication link.
Embodiment four
With reference to figure 5, a kind of photoelectricity that embodiment 4 has provided the present invention's proposition mixes a kind of embodiment of broadcasting transmission method.
The pattern that the signal of present embodiment adopts DVB to support, in conjunction with characteristics of the present invention, utilize common technology with power line communication and seamless the merging into one of optical communication, and added the operation of channel precompensation, improved reliability of information transmission, because the ubiquitous property of power line and the robustness of optical communication can be used for the broadcasting of DVB signal.
S1, power line communication module produce or transmit broadcast transmission signal according to predetermined broadcasting transmission standard, after handling through AFE (analog front end), be coupled in the power circuit and transmit;
In the present embodiment, power line communication module is transmitted broadcast transmission signal according to predetermined broadcasting transmission standard, and transmitting of transmitting can be DVB-T, DVB-T2, DVB-C, DVB-C2, the various patterns that DVB-S, DVB-S2 support are moved the power line communication frequency range with the DVB signal from radio frequency.Be coupled to after the processing such as the broadcast transmission signal process numeric field pre-distortion compensated of transmitting, digital-to-analogue conversion and transmit in the power circuit, wherein on duty amass of the frequency response of the frequency response of pre-distortion compensated processing and power line channel on each Frequency point is steady state value.The power line communication frequency range is 2-10MHz.
S2, signal trunk module obtain to transmit signal in the power line by coupler, after handling through AFE (analog front end), again this signal are converted to current drive signal, drive optical communications module;
In the present embodiment, the signal trunk module obtains to transmit signal in the power line by coupler, through behind filtering, power adjustment and the analog domain pre-distortion compensated, this signal is converted to current drive signal, drive optical communications module, wherein on duty amass of the frequency response of the frequency response of pre-distortion compensated processing and visible light channel on each Frequency point is steady state value.
S3, optical communications module utilize current signal driving LED luminosity, will receive the signal forwarding and enter optical communication link.
In the present embodiment, optical communications module utilizes current signal driving LED luminosity, by led array, adopts space diversity reception to communicate, improves transmission reliability, the signal that receives is transmitted entered optical communication link.
Embodiment five
With reference to figure 6, a kind of photoelectricity that embodiment 5 has provided the present invention's proposition mixes a kind of embodiment of broadcasting transmission method.
The pattern that the signal of present embodiment adopts broadband power line communication standard IEEE 1901 and ITU-T G.hn to support, in conjunction with characteristics of the present invention, utilize common technology with power line communication and seamless the merging into one of optical communication, and added the operation of channel precompensation, improved reliability of information transmission, because the ubiquitous property of power line and the robustness of optical communication can be used for the broadcasting of power line signal.
S1, power line communication module produce or transmit broadcast transmission signal according to predetermined broadcasting transmission standard, after handling through AFE (analog front end), be coupled in the power circuit and transmit;
In the present embodiment, power line communication module produces broadcast transmission signal, the various patterns that transmit and can adopt IEEE1901 and ITU-T G.hn to support that produce according to predetermined broadcasting transmission standard.Be coupled to after the processing such as the broadcast transmission signal process numeric field pre-distortion compensated that produces, digital-to-analogue conversion and transmit in the power circuit, wherein on duty amass of the frequency response of the frequency response of pre-distortion compensated processing and power line channel on each Frequency point is steady state value.The power line communication frequency range is 2-30MHz or 2-50MHz.
S2, signal trunk module obtain to transmit signal in the power line by coupler, after handling through AFE (analog front end), again this signal are converted to current drive signal, drive optical communications module;
In the present embodiment, the signal trunk module obtains to transmit signal in the power line by coupler, through behind filtering, power adjustment and the numeric field pre-distortion compensated, this signal is converted to current drive signal, drive optical communications module, wherein on duty amass of the frequency response of the frequency response of pre-distortion compensated processing and visible light channel on each Frequency point is steady state value.
S3, optical communications module utilize current signal driving LED luminosity, will receive the signal forwarding and enter optical communication link.
In the present embodiment, optical communications module utilizes current signal driving LED luminosity, by led array, adopts space multiplexing technique, improves efficiency of transmission, the signal that receives is transmitted entered optical communication link.
Embodiment six
Fig. 7 is the structure chart of apparatus of the present invention, the invention provides a kind of photoelectricity and mixes the broadcasting transmitting device, and this device comprises:
Power line communication module is used for producing or transmit broadcast transmission signal according to predetermined broadcasting transmission standard, after handling through AFE (analog front end), is coupled in the power circuit and transmits;
The signal trunk module is used for obtaining power line by coupler and transmits signal, after handling through AFE (analog front end), again this signal is converted to current drive signal, drives optical communications module;
Optical communications module is used for utilizing current signal driving LED luminosity, will receive the signal forwarding and enter optical communication link.
The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the technology of the present invention principle; can also make some improvement and replacement, these improvement and replacement also should be considered as protection scope of the present invention.
Claims (10)
1. a photoelectricity mixes the broadcasting transmission method, it is characterized in that, comprises step:
S1, power line communication module produce or transmit broadcast transmission signal according to predetermined broadcasting transmission standard, after handling through AFE (analog front end), be coupled in the power circuit and transmit;
S2, signal trunk module obtain to transmit signal in the power line by coupler, after handling through AFE (analog front end), again this signal are converted to current drive signal, drive optical communications module;
S3, optical communications module utilize current signal driving LED luminosity, will receive the signal forwarding and enter optical communication link.
2. the method for claim 1, it is characterized in that, predetermined broadcasting transmission standard described in the step S1 number comprises: DTMB, ABS-S, DVB-T, DVB-T2, DVB-S, DVB-S2, DVB-C, DVB-C2, CMMB, DAB broadcast standard, and the various patterns supported of IEEE1901 and ITU-T G.hn power line standard.
3. the method for claim 1 is characterized in that, AFE (analog front end) described in step S1 and the S2 is handled and can be carried out the pre-distortion compensated processing.
4. method as claimed in claim 3 is characterized in that, described pre-distortion compensated is treated to numeric field pre-distortion compensated or analog domain pre-distortion compensated.
5. as claim 3 or 4 described methods, it is characterized in that the frequency response that described pre-distortion compensated is handled and the frequency response of power line channel or visible light channel on duty the amassing on each Frequency point is steady state value.
6. the method for claim 1 is characterized in that, AFE (analog front end) can be carried out power adjustment or filtering operation in handling among step S1 and the S2.
7. the method for claim 1 is characterized in that, described power line communication module and optical communications module are all supported multiple-input and multiple-output.
8. method as claimed in claim 7 is characterized in that, the multiple-input and multiple-output of described power line communication module comprises wavelength division multiplexing, spatial reuse.
9. method as claimed in claim 7 is characterized in that, the multiple-input and multiple-output of described optical communications module comprises space diversity, spatial reuse and wave beam forming.
10. a photoelectricity mixes the broadcasting transmitting device, it is characterized in that, comprising:
Power line communication module is used for producing or transmit broadcast transmission signal according to predetermined broadcasting transmission standard, after handling through AFE (analog front end), is coupled in the power circuit and transmits;
The signal trunk module is used for obtaining power line by coupler and transmits signal, after handling through AFE (analog front end), again this signal is converted to current drive signal, drives optical communications module;
Optical communications module is used for utilizing current signal driving LED luminosity, will receive the signal forwarding and enter optical communication link.
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| CN107257254B (en) * | 2017-07-21 | 2020-06-02 | 电子科技大学 | Constant modulus beam forming method in secure and secret communication system |
| WO2020258410A1 (en) * | 2019-06-28 | 2020-12-30 | 清华大学 | Photoelectric hybrid single-frequency network broadcasting method and system |
| CN113055091A (en) * | 2019-12-26 | 2021-06-29 | 中兴通讯股份有限公司 | Communication module, communication device, communication control method, and storage medium |
| CN113055091B (en) * | 2019-12-26 | 2024-04-19 | 中兴通讯股份有限公司 | Communication module, communication device, communication control method, and storage medium |
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