CN218850779U - Communication device based on MIMO wireless optical communication technology - Google Patents
Communication device based on MIMO wireless optical communication technology Download PDFInfo
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- CN218850779U CN218850779U CN202222854226.0U CN202222854226U CN218850779U CN 218850779 U CN218850779 U CN 218850779U CN 202222854226 U CN202222854226 U CN 202222854226U CN 218850779 U CN218850779 U CN 218850779U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The utility model discloses a communication device based on MIMO wireless optical communication technique, include: the device comprises a shell with an opening at the top end, an optical antenna and a receiving device, wherein the optical antenna and the receiving device are arranged in the shell; the optical antenna is used for collecting optical signals emitted by an emission light source and comprises a convex lens arranged at an opening at the top end of the shell, a concave lens arranged below the convex lens and a focusing light spot coupling device arranged below the concave lens; the receiving device is used for converting the collected optical signals into electric signals and comprises a signal processing module and a plurality of photoelectric detectors, the input end of each photoelectric detector is connected with an optical fiber output by the focusing light spot coupling device, and the output end of each photoelectric detector is electrically connected with the input end of the signal processing module. The utility model discloses a combine together MIMO wireless optical communication technique and multichannel optical fiber coupling technique, not only increased the throughput of data, promoted MIMO wireless optical communication system's channel quantity, realized the multichannel in less size moreover and received.
Description
Technical Field
The utility model belongs to the technical field of wireless optical communication, concretely relates to communication device based on wireless optical communication technique is received more to multiple.
Background
The underwater wireless communication is a key technology for developing a marine observation system, and by means of the marine observation system, data related to oceanography can be collected, environmental pollution and climate change seabed abnormal earthquake volcanic activity can be monitored, seabed targets can be explored, and remote image transmission can be carried out. Underwater wireless communication also plays a vital role in military affairs, and is also a key technology of an underwater sensor network.
The wireless optical communication technology is a technology for transmitting information by using high-speed bright and dark flickers of a light source which cannot be recognized by naked eyes, such as a fluorescent lamp, a light emitting diode or a laser diode, thereby simultaneously realizing data transmission and an illumination function. Compared with radio frequency communication and underwater sound wave communication technologies, wireless optical communication has good confidentiality, can realize higher data transmission rate, has strong anti-interference capability and high safety, and has become the key point of scientific research and industrial focus of all countries.
When wireless optical communication is performed, the communication rate and the system reliability are greatly limited due to limited bandwidth, large interference and high signal-to-noise ratio. In order to solve such problems, the communication field has a multiple-input multiple-output technology, i.e. MIMO communication technology, which can improve the capacity and spectrum utilization rate of the communication system by times without increasing the bandwidth. It can be defined that there are many independent channels between the sending end and the receiving end, that is, there is sufficient interval between the antenna units, so that the correlation of signals between antennas is eliminated, the link performance of signals is improved, the data throughput is increased, and the reliability of communication is improved.
In addition, because the receiving end of the current wireless optical communication system mainly uses the photoelectric detectors to directly receive the optical signals, the number of the photoelectric detectors directly determines the number of independent channels of the MIMO system, and the more the number is, the more the communication effect brought by the MIMO wireless optical communication system is improved. For example, a MIMO visible light communication system based on an LED array, disclosed in publication No. CN112511227B, is a communication method combining a visible light communication technology and a MIMO communication system, so as to improve the transmission rate of the system, but because the photodetector is directly disposed at the focus of the light spot behind the optical antenna, and the photodetector itself has a certain volume, after the light emitted from the emitting light source is focused, the light spot is concentrated in a small area on the focus plane, and it is difficult to dispose a large number of photodetectors in this area, so that the advantages of the MIMO communication system are difficult to be exerted in a small wireless optical communication device.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the problem among the prior art, provide a communication device, through combining together MIMO communication technology and multichannel optical fiber coupling technique, improve communication quality, reduce the communication device size.
The utility model discloses a realize like this:
a communication device based on MIMO wireless optical communication technology, comprising: the device comprises a shell with an opening at the top end, an optical antenna and a receiving device, wherein the optical antenna and the receiving device are arranged in the shell; the optical antenna is used for collecting optical signals emitted by the emission light source and comprises a convex lens arranged at an opening at the top end of the shell, a concave lens arranged below the convex lens and a focusing light spot coupling device arranged below the concave lens; the receiving device is used for converting the collected optical signals into electric signals and comprises a signal processing module and a plurality of photoelectric detectors, the input end of each photoelectric detector is connected with an optical fiber output by the focusing light spot coupling device, and the output end of each photoelectric detector is electrically connected with the input end of the signal processing module.
Preferably, the focusing spot coupling device is an optical fiber coupler, the optical fiber coupler includes a plurality of optical fiber ports, the number of the optical fiber ports is greater than or equal to the number of the emission light sources of the emission device, so that each emission light source corresponds to at least one optical fiber port.
Preferably, the number of the photodetectors is the same as that of the optical fiber ports of the optical fiber coupler, and the photodetectors are connected with the optical fibers output by the optical fiber ports in a one-to-one correspondence manner.
Preferably, the signal processing module includes a signal amplifier and a demodulation circuit.
Preferably, the underwater unmanned aerial vehicle further comprises a signal output connector which is arranged at the bottom of the shell and electrically connected with the output end of the signal processing module and is used for transmitting signals to the underwater unmanned aerial vehicle.
Preferably, the shell further comprises a transparent shell cover covering the top opening of the shell.
Preferably, the transparent shell cover is an outwards convex hemispherical transparent acrylic cover, the edge of the transparent acrylic cover is further integrally provided with a round annular connecting plate, the connecting plate is provided with bolt holes, and the shell and the transparent shell cover are detachably connected through bolts.
Preferably, a sealing gasket for improving the waterproofness of the device is arranged between the shell and the transparent cover.
Preferably, the bottom of the shell is provided with a mounting seat, and a fixing hole is preset in the mounting seat so as to conveniently mount and fix the communication device on the underwater unmanned equipment.
Preferably, the shape of the convex lens is any one of plano-convex and biconvex; the concave lens is in any one shape of plano-concave and biconcave.
The utility model provides a this kind of communication device based on MIMO wireless optical communication technique's beneficial effect is:
1. the utility model discloses a battery of lens improves, has confirmed best lens combination through the experiment, adopts convex lens and concave lens combination mode, when reducing the whole volume that occupies of system, has guaranteed that equivalent focal length is unchangeable to guarantee the quality of facula and the diameter size of facula, and then guaranteed better optical communication quality.
2. The utility model discloses introduced MIMO communication technology, transmitted through a plurality of light sources of signal distribution that will handle, still settled the facula receiving system of at least equal quantity in optical system focus department according to transmitting light source quantity simultaneously, increased data throughput, improved the reliability.
3. The utility model discloses optical fiber coupler has been introduced, has changed into the great photoelectric detector array of facula region volume the less fiber port array of volume to can settle more sets of facula receiving system in same size, and then promote MIMO wireless optical system's channel quantity, finally improve the performance of system.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of an internal structure of a communication device according to an embodiment of the present invention, the communication device being based on a MIMO wireless optical communication technology;
fig. 2 is a schematic diagram of an arrangement mode of optical fiber ports of an optical fiber coupler in a communication device based on the MIMO wireless optical communication technology.
In the figure: the optical fiber connector comprises a shell 1, a transparent shell cover 2, a connecting plate 3, a bolt 4, a sealing washer 5, a mounting seat 6, a fixing hole 7, a convex lens 8, a concave lens 9, a fixing plate 10, an optical fiber coupler 11, an optical fiber port 111, an optical fiber 12, a photoelectric detector 13, a signal processing module 14 and a signal output connector 15.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a communication device based on MIMO wireless optical communication technology, including a housing 1, an optical antenna and a receiving device installed in the housing 1; specifically, the method comprises the following steps:
in this embodiment, casing 1 is open-top's cylinder for installation and holding optical antenna and receiving arrangement, 1 open-top of casing is equipped with a transparent cap 2, transparent cap 2 is outside convex hemispherical transparent acrylic cover, and transparent acrylic cover edge still the integration is equipped with round annular connecting plate 3, it has the bolt hole to open on the connecting plate 3, casing 1 with transparent cap 2 passes through bolt 4 and can dismantle the connection. And a circle of sealing gasket 5 for improving the waterproofness of the device is arranged between the shell 1 and the transparent shell cover 2. And the bottom of the shell 1 is also integrally provided with a mounting seat 6, and a fixing hole 7 is preset on the mounting seat 6, so that the communication device can be conveniently mounted and fixed on the underwater unmanned equipment.
The optical antenna is used for collecting optical signals emitted by an emission light source, and as a preferred embodiment, the optical antenna comprises a convex lens 8, a concave lens 9 and a focusing light spot coupling device, wherein the convex lens 8 is fixedly installed at an opening at the top end of the shell 1, and the mirror surface of the convex lens 8 protrudes outwards so as to facilitate light irradiation; the concave lens 9 is arranged below the convex lens 8, and the focal length between the convex lens 8 and the concave lens 9 is calculated by a double-optical-group focal length calculation formula according to the relative position between the emission light source and the optical antenna; the shape of the convex lens 8 may be plano-convex, biconvex, or the like; the concave lens 9 may be plano-concave, biconcave, or the like.
In this embodiment, the focused light spot coupling device is an optical fiber coupler 11, the optical fiber coupler 11 includes 9 optical fiber ports 111, as shown in fig. 2, the optical fiber ports 111 are uniformly arranged in a 3 × 3 rectangular array, and the number of the optical fiber ports 111 is greater than or equal to the number of the emission light sources in the input module, so that each emission light source corresponds to at least one optical fiber port 111, and the optical fiber coupler 11 is disposed at a focal point below the concave lens 9 through the concave lens 9, so that light energy output by the emission light source can be maximally coupled into the optical fiber 12. Compared with the mode that the photoelectric detector 13 array with larger size is directly arranged in a small light spot area below the concave lens 9, the size of the optical fiber port 111 array of the optical fiber coupler 11 is smaller, on one hand, more sets of light spot receiving systems can be arranged in the same size on the premise that the quality of light spots and the diameter of the light spots are not changed, so that the number of channels of the MIMO system is increased, and finally the communication performance of the system is improved; on the other hand, on the premise of ensuring that the communication performance is not changed, the size of the whole MIMO wireless optical communication device is greatly reduced, and when the inner space of the shell 1 is insufficient, the photoelectric detector 13 can be installed outside the shell 1 or transferred to underwater unmanned equipment, so that the receiving of multiple paths of optical signals is realized in a smaller size.
The receiving device is installed in a waterproof inner shell in the shell 1 and used for converting collected optical signals into electric signals, the receiving device comprises a plurality of photoelectric detectors 13 and a signal processing module 14, the number of the photoelectric detectors 13 is the same as that of the optical fiber ports 111 of the optical fiber coupler 11, the input end of each photoelectric detector 13 is connected with one optical fiber 12 output by one optical fiber port 111 in a one-to-one correspondence mode, and the output end of each photoelectric detector 13 is electrically connected with the input end of the signal processing module 14. The signal processing module 14 includes a signal amplifier and a demodulation circuit. The bottom of the shell 1 is also provided with a signal output connector 15 electrically connected with the output end of the signal processing module 14, and the signal output connector 15 can be matched with a signal input interface of the underwater unmanned equipment so as to transmit signals to the underwater unmanned equipment.
The utility model provides a this kind of communication device based on MIMO wireless optical communication technique's specific communication process as follows:
the signal to be transmitted is first transmitted to the signal emitter, where the modulator circuit modulates the signal and outputs N via the input light source T (N T In this embodiment, 9) independent signal streams; n is a radical of T The independent signal streams are loaded on the emission light sources respectively and emitted in the form of optical signals; when the optical antenna receives the light emitted by the emitting light source, the light can pass through the convex lens 8 and the concave lens 9 in sequence and is focused into N with good quality in a small space T Each light spot; each light spot is coupled into an optical fiber port 111 respectively and then transmitted to a photoelectric detector 13 along with a corresponding optical fiber 12; n is a radical of T The photo-detector 13 senses the optical signal and converts it into N T The electric signals are sent to the signal processing module 14; n is a radical of T After the channel signal enters the signal processing module 14, the signal amplifier amplifies the weak electrical signal, and then the weak electrical signal is subjected to a summation and demodulation step, so that the original information is restored, and finally the device successfully receives the weak electrical signal.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A communication apparatus based on MIMO wireless optical communication technology, comprising: the device comprises a shell with an opening at the top end, an optical antenna and a receiving device, wherein the optical antenna and the receiving device are arranged in the shell;
the optical antenna is used for collecting optical signals emitted by an emission light source and comprises a convex lens arranged at an opening at the top end of the shell, a concave lens arranged below the convex lens and a focusing light spot coupling device arranged below the concave lens;
the receiving device is used for converting the collected optical signals into electric signals and comprises a signal processing module and a plurality of photoelectric detectors, the input end of each photoelectric detector is connected with an optical fiber output by the focusing light spot coupling device, and the output end of each photoelectric detector is electrically connected with the input end of the signal processing module.
2. A communication apparatus based on MIMO wireless optical communication technology according to claim 1, wherein: the focusing light spot coupling device is an optical fiber coupler, the optical fiber coupler comprises a plurality of optical fiber ports, the number of the optical fiber ports is larger than or equal to the number of the emission light sources of the emission device, and each emission light source at least corresponds to one optical fiber port.
3. A communication apparatus based on MIMO wireless optical communication technology according to claim 2, wherein: the number of the photoelectric detectors is the same as that of the optical fiber ports of the optical fiber coupler, and the photoelectric detectors are connected with the optical fibers output by the optical fiber ports in a one-to-one correspondence manner.
4. A communication apparatus based on MIMO wireless optical communication technology according to claim 1, wherein: the signal processing module includes a signal amplifier and a demodulation circuit.
5. A communication apparatus based on MIMO wireless optical communication technology according to claim 1, wherein: the underwater unmanned aerial vehicle further comprises a signal output connector which is arranged at the bottom of the shell and electrically connected with the output end of the signal processing module and is used for transmitting signals to the underwater unmanned aerial vehicle.
6. A communication apparatus based on MIMO wireless optical communication technology according to claim 1, wherein: the transparent shell cover is covered at the opening at the top of the shell.
7. The communication device according to claim 6, wherein the MIMO wireless optical communication technology comprises: the transparent shell cover is a hemispherical transparent acrylic cover protruding outwards, a circle of annular connecting plate is integrally arranged at the edge of the transparent acrylic cover, bolt holes are formed in the connecting plate, and the shell and the transparent shell cover are detachably connected through bolts.
8. A communication apparatus based on MIMO wireless optical communication technology according to claim 7, wherein: and a sealing gasket for improving the waterproofness of the device is arranged between the shell and the transparent shell cover.
9. A communication apparatus based on MIMO wireless optical communication technology according to claim 1, wherein: the bottom of the shell is provided with a mounting seat, and a fixing hole is preset in the mounting seat so as to conveniently mount and fix the communication device on the underwater unmanned equipment.
10. A communication apparatus based on MIMO wireless optical communication technology according to any one of claims 1-9, wherein: the shape of the convex lens is any one of plano-convex and biconvex; the concave lens is in any one shape of plano-concave and biconcave.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222854226.0U CN218850779U (en) | 2022-10-25 | 2022-10-25 | Communication device based on MIMO wireless optical communication technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222854226.0U CN218850779U (en) | 2022-10-25 | 2022-10-25 | Communication device based on MIMO wireless optical communication technology |
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| Publication Number | Publication Date |
|---|---|
| CN218850779U true CN218850779U (en) | 2023-04-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222854226.0U Active CN218850779U (en) | 2022-10-25 | 2022-10-25 | Communication device based on MIMO wireless optical communication technology |
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| CN (1) | CN218850779U (en) |
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2022
- 2022-10-25 CN CN202222854226.0U patent/CN218850779U/en active Active
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