CN111147147B - Wireless communication system and method based on phased array - Google Patents
Wireless communication system and method based on phased array Download PDFInfo
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- CN111147147B CN111147147B CN201911380870.5A CN201911380870A CN111147147B CN 111147147 B CN111147147 B CN 111147147B CN 201911380870 A CN201911380870 A CN 201911380870A CN 111147147 B CN111147147 B CN 111147147B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
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Abstract
The invention discloses a wireless communication system and a method based on a phase array, which relate to the technical field of wireless communication, wherein the system comprises a wireless communication node and a receiving unit, the wireless communication node comprises a phase array chip, a multi-channel voltage source and a control and storage module, and the phase array chip comprises a beam splitter, a heating unit and a grating array; the multi-channel voltage source comprises output ends with the same number as the heating units, and each output end is correspondingly connected with one heating unit; the control and storage module is connected with the multi-channel voltage source and is used for pre-storing voltage data corresponding to each heating unit during deflection of different light beams and controlling the voltage of each output end of the multi-channel voltage source according to the stored voltage data; the receiving unit is used for receiving the light beam output by the wireless communication node and converting the light beam into an electric signal which can be used by a user. The wireless communication system provided by the invention has the advantages of flexible networking, reconfiguration, no wiring control and the like.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a wireless communication system and a wireless communication method based on a phase array.
Background
In recent years, due to rapid growth of multimedia services such as network games, Virtual Reality (VR), Augmented Reality (AR), and the like, demands for wireless transmission traffic by users are more urgent. The number of personal mobile devices such as smartphones, tablets, etc. connected to a wireless network has increased substantially, which also accelerates congestion in the wireless network.
In the prior art, in order to solve the congestion of the wireless network, a technology Wi-Fi based on a wireless access mode is generally adopted, and although the technology Wi-Fi based on the wireless access mode can provide a complete solution, the available modulation bandwidth is limited within a microwave range.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a wireless communication system based on a phase array, which has the advantages of flexible networking, reconfiguration, no wiring control and the like.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
a phased array based wireless communication system, comprising:
a wireless communication node, comprising:
the phase array chip comprises a beam splitter, heating units and a grating array, wherein the number of the heating units is the same as that of channels of the beam splitter, the beam splitter is used for dividing an optical fiber beam into a plurality of channels and outputting the multi-channel beam, the heating units are used for carrying out phase modulation on the beams of the corresponding channels, and the grating array is used for receiving the output beams of all the heating units and outputting deflected beams;
the multi-channel voltage source comprises output ends with the same number as the heating units, and each output end is correspondingly connected with one heating unit;
the control and storage module is connected with the multi-channel voltage source and is used for pre-storing voltage data corresponding to each heating unit during deflection of different light beams and controlling the voltage of each output end of the multi-channel voltage source according to the stored voltage data so as to control the deflection angle of the light beams output by the grating array;
and the receiving unit is used for receiving the light beam output by the wireless communication node and converting the light beam into an electric signal which can be used by a user.
On the basis of the technical scheme, the receiving unit comprises two lenses and a photodiode which are sequentially arranged, the two lenses are used for compressing the light beam emitted by the wireless communication node and then gathering the light beam on the photodiode, and the photodiode is used for converting the light beam into an electric signal which can be used by a user.
On the basis of the technical scheme, the deflection angles of all the light beams output by the grating array are the same.
On the basis of the technical scheme, the deflection angles of all the light beams output by the grating array are different.
The invention also provides a wireless communication method based on the phase array, which comprises the following steps:
obtaining voltage data corresponding to each heating unit according to the position distribution and access conditions of all users, and storing the voltage data in a control and storage module;
when the wireless communication node receives a signal which is ready for accessing by a user, the control and storage module controls the voltage of all output ends of the multi-channel voltage source according to the stored voltage data;
the beam splitter divides the optical fiber light beam into multi-channel light beams and outputs the multi-channel light beams, each heating unit carries out different phase modulation on the light beam of the corresponding channel according to the voltage of the corresponding output end of the multi-channel voltage source, and the grating array receives the output light beams of all the heating units and outputs the deflected light beams.
On the basis of the technical scheme, when only one user accesses, all light beams output by the grating array are deflected by the same angle to the position of the user.
On the basis of the technical scheme, when at least two users access the optical network, the deflection angles of all the light beams output by the grating array are different, and all the light beams are deflected to the positions of all the users on average.
On the basis of the technical scheme, when the access condition of a user is changed, the voltages of all output ends of the multi-channel voltage source are readjusted to adjust the deflection state of the light beams output by the grating array.
On the basis of the technical scheme, when wireless communication is provided for a single user, if the position of the user is changed, the deflection angle of the light beam is readjusted according to the position distribution situation of the user after the change, so that the light beam is deflected to the position of the user after the change.
On the basis of the above technical solution, when wireless communication is provided for a plurality of users, if a user is connected or disconnected, the deflection angle of the light beam needs to be readjusted according to the position distribution of all currently connected users, so that the light beam is deflected to the positions of all currently connected users.
Compared with the prior art, the invention has the advantages that: the transmitting end projects laser beams carrying signals in optical fibers into space, the laser beams are collected by the receiving unit after being transmitted for a certain distance in the space, the signals received by the receiving unit can be used by users after being subjected to photoelectric conversion, photoelectric conversion is not needed in the transmission process, the laser beams in the optical fibers entering the users can be directly transmitted in the space, and the users can receive the signals through the receiving unit and obtain data.
Drawings
Fig. 1 is a block diagram of a wireless communication system based on phased arrays according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a receiving unit according to an embodiment of the present invention;
fig. 3 is a flow chart of a wireless communication method based on phased arrays according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Referring to fig. 1, a wireless communication system based on a phased array according to an embodiment of the present invention includes a wireless communication node and a receiving unit. The wireless communication node comprises a phase array chip, a multi-channel voltage source and a control and storage module.
The phase array chip comprises a beam splitter, heating units and a grating array, wherein the number of the heating units is the same as that of channels of the beam splitter, the beam splitter is used for dividing an optical fiber beam into a plurality of channels and outputting the multi-channel optical beam, the heating units are used for carrying out phase modulation on the optical beam of the corresponding channel, and the grating array is used for receiving the output optical beams of all the heating units and outputting the deflected optical beam.
The multi-channel voltage source comprises output ends with the same number as the heating units, and each output end is correspondingly connected with one heating unit.
The control and storage module is connected with the multi-channel voltage source and is used for storing voltage data corresponding to each heating unit in the deflection of different light beams in advance and controlling the voltage of each output end of the multi-channel voltage source according to the stored voltage data so as to control the deflection angle of the light beams output by the grating array.
The receiving unit is used for receiving the light beam output by the wireless communication node and converting the light beam into an electric signal which can be used by a user.
The working process of the wireless communication system based on the phase array of the embodiment of the invention is as follows: according to the position distribution and access condition of all users, voltage data corresponding to each heating unit is obtained through experiments, namely the voltage data corresponding to each heating unit when different light beams deflect, the voltage data are stored in a control and storage module in advance, when the optical fiber heating device is required to be used, the voltage corresponding to the voltage data is found from the stored voltage data according to the actual access condition of the users, the voltages of all output ends of a multi-channel voltage source are controlled according to the corresponding voltage data, the optical fiber light beam is divided into multi-channel light beams after passing through a beam splitter, each heating unit carries out different phase modulation on the light beam of the corresponding channel according to the voltage of the output end corresponding to the multi-channel voltage source, a grating array receives the output light beams of all the heating units, outputs the deflected light beams to an access user side, and a receiving unit converts the light beams into electric signals, for use by a user.
According to the phase array-based wireless communication system, the transmitting end projects the laser beam carrying the signal in the optical fiber into the space, the laser beam is collected by the receiving unit after being transmitted for a certain distance in the space, the signal received by the receiving unit can be used by a user after being subjected to photoelectric conversion, photoelectric conversion is not required in the transmission process, the laser beam in the optical fiber to the user can be directly transmitted in the space, and the user receives the signal through the receiving unit and obtains data.
Preferably, in the embodiment of the present invention, the plurality of heating units may also be an integrated heater structure, that is, one heater includes a plurality of heating units, each heating unit may control the phase of one channel light beam independently, so that the integration level is higher, and the use is more convenient.
Referring to fig. 2, in more detail, in the embodiment of the present invention, the receiving unit is located at a user side, and the receiving unit includes two lenses and a photodiode PD, which are arranged in sequence, the two lenses are used for compressing a light beam emitted by the wireless communication node and then focusing the light beam on the photodiode PD, and the photodiode PD is used for converting the light beam into an electrical signal available for a user. Wherein, the two lenses are lens 1 and lens 2, and the photodiode is abbreviated as PD.
In the embodiment of the present invention, the working process of the receiving unit is as follows: the photodiode PD is responsible for receiving the download signal so as to demodulate the signal, the lens combination compresses the light beam to enable energy to be concentrated on the surface of the PD, after the laser light beam in the space is emitted from the wireless communication node and is transmitted to the ground floor through the indoor ceiling, the light beam is received by the receiving unit at the user side, the light beam is combined and compressed through the lens to enable the energy to be concentrated on the surface of the photodiode PD, and therefore the light beam is converted into an electric signal which can be used by the user.
In the embodiment of the present invention, the situation of the light beam deflection is different according to the different access situations of the users.
When only a single user is connected to the wireless communication system, all light beams only need to be deflected to the user, and correspondingly, the deflection angles of all light beams output by the grating array are the same.
When a plurality of users access the wireless communication system, all light beams need to be deflected to different users after being split, and correspondingly, the deflection angles of all light beams output by the grating array are different.
Preferably, when a plurality of users access the wireless communication system, all light beams are equally distributed to different users, and after the photoelectric conversion, the intensity of the electric signals received by different users is the same, and the even distribution is more reasonable.
Referring to fig. 3, an embodiment of the present invention further provides a wireless communication method based on a phased array, including the steps of:
s1: obtaining voltage data corresponding to each heating unit according to the position distribution and access conditions of all users, and storing the voltage data in a control and storage module;
s2: when the wireless communication node receives a signal which is ready for accessing by a user, the control and storage module controls the voltage of all output ends of the multi-channel voltage source according to the stored voltage data;
s3: the beam splitter divides the optical fiber beam into multi-channel beams and outputs the multi-channel beams;
s4: each heating unit carries out different phase modulation on the light beam of the corresponding channel according to the voltage of the corresponding output end of the multi-channel voltage source;
s5: the grating array receives the output light beams of all the heating units and outputs deflected light beams.
It should be noted that, in the wireless communication method based on phased array according to the embodiment of the present invention, in step S1, voltage data is obtained according to the location distribution and access situation of all users and is pre-stored in the control and storage module, it should be understood that the purpose of step S1 is to pre-store voltage data corresponding to each heating unit at different beam deflection in the control and storage module.
The control and storage module of the embodiment of the invention stores the corresponding voltage data under all conditions in advance, and then selects and uses the corresponding voltage data according to the actual access condition of the user, thereby being more convenient and having higher efficiency.
The corresponding voltage data for these different access situations can be stored in the form of a table, taking an 8-channel beam splitter, an 8-channel voltage source, and 8 heating units as examples, and the table information stored in the control and memory module includes the access user situations and 8 voltage data.
In the embodiment of the present invention, the situation of the light beam deflection is different according to the different access situations of the users.
When only one user accesses, all the beams output by the grating array are deflected by the same angle and are deflected to the position of the user.
When at least two users access, the deflection angles of all light beams output by the grating array are different, all the light beams are deflected to the positions of all the users averagely, all the light beams are averagely distributed to different users, and after photoelectric conversion is carried out, the intensities of electric signals received by different users are the same, and the electric signals are distributed averagely and are more reasonable.
Furthermore, in the embodiment of the present invention, when the user access condition changes, the voltages at all the output terminals of the multi-channel voltage source are readjusted to adjust the deflection state of the light beam output by the grating array.
There are many situations where the user access situation changes, including but not limited to: when a single user accesses, the position of the user changes; when a single user accesses, the user access A is changed into the user access B; when a plurality of users access, the users access or disconnect. Besides the above-mentioned cases, there are many cases where the user access situation changes, and the wireless communication method is similar and will not be described herein again.
When wireless communication is provided for a single user, if the position of the user changes, the deflection angle of the light beam is readjusted according to the position distribution condition of the user after the change, so that the light beam is deflected to the position of the user after the change. The specific process is as follows:
obtaining voltage data corresponding to each heating unit according to different position distribution of the user, and storing the voltage data in a control and storage module in advance;
when the wireless communication node receives a signal to be accessed by the user, the control and storage module controls the voltage of all output ends of the multi-channel voltage source according to the stored voltage data, each heating unit carries out different phase modulation on the light beam of the corresponding channel according to the voltage of the corresponding output end of the multi-channel voltage source, and the grating array receives the output light beams of all the heating units and outputs the deflected light beams to deflect the light beams to the position of the user;
when the position of the user changes, the voltages of all output ends of the multi-channel voltage source are readjusted according to the corresponding voltage data when the user is distributed at different positions, so that the deflection angle of the light beam output by the grating array is adjusted, and the light beam is deflected to the position of the user after the user changes.
When wireless communication is provided for a single user, if the user is switched to another user access, namely the access of the user A is changed into the access of the user B, the deflection angle of the light beam is readjusted according to the position distribution condition of the another user accessed again, so that the light beam is deflected to the position of the another user. The specific process is as follows:
correspondingly obtaining voltage data corresponding to each heating unit according to different position distributions of the user and another user, and storing the voltage data in a control and storage module in advance;
when the wireless communication node receives a signal to be accessed by the user, the control and storage module controls the voltage of all output ends of the multi-channel voltage source according to the stored voltage data, each heating unit carries out different phase modulation on the light beam of the corresponding channel according to the voltage of the corresponding output end of the multi-channel voltage source, and the grating array receives the output light beams of all the heating units and outputs the deflected light beams to deflect the light beams to the position of the user;
when the user is switched to another user for access, the voltages of all output ends of the multi-channel voltage source are readjusted according to the voltage data corresponding to the position distribution of the another user for access again so as to adjust the deflection angle of the light beam output by the grating array and deflect the light beam to the position of the another user.
When wireless communication is provided for a plurality of users, if a user is connected or disconnected, the deflection angle of the light beam needs to be adjusted again according to the position distribution condition of all the currently connected users, so that the light beam is deflected to the positions of all the currently connected users. The specific process is as follows:
obtaining voltage data corresponding to each heating unit according to different position distribution of all users, and storing the voltage data in a control and storage module in advance;
when the wireless communication node receives a signal to be accessed by a user, the control and storage module controls the voltage of all output ends of the multi-channel voltage source according to the stored voltage data, each heating unit carries out different phase modulation on the light beam of the corresponding channel according to the voltage of the corresponding output end of the multi-channel voltage source, and the grating array receives the output light beams of all the heating units and outputs the deflected light beams to deflect the light beams to the positions of all the users;
when a user is switched in or switched off, the voltages of all output ends of the multi-channel voltage source are readjusted according to the position distribution condition of all currently switched-in users so as to adjust the deflection angle of the light beam output by the grating array and deflect the light beam to the positions of all currently switched-in users.
The present invention is not limited to the above-described embodiments, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements are also considered to be within the scope of the present invention. Those not described in detail in this specification are within the skill of the art.
Claims (10)
1. A phased array based wireless communication system, comprising:
a wireless communication node, comprising:
the phase array chip comprises a beam splitter, heating units and a grating array, wherein the number of the heating units is the same as that of channels of the beam splitter, the beam splitter is used for dividing an optical fiber beam into a plurality of channels and outputting the multi-channel beam, the heating units are used for carrying out phase modulation on the beams of the corresponding channels, and the grating array is used for receiving the output beams of all the heating units and outputting deflected beams;
the multi-channel voltage source comprises output ends with the same number as the heating units, and each output end is correspondingly connected with one heating unit;
the control and storage module is connected with the multi-channel voltage source and is used for pre-storing voltage data corresponding to each heating unit during deflection of different light beams and controlling the voltage of each output end of the multi-channel voltage source according to the stored voltage data so as to control the deflection angle of the light beams output by the grating array;
and the receiving unit is used for receiving the light beam output by the wireless communication node and converting the light beam into an electric signal which can be used by a user.
2. The phased array based wireless communication system of claim 1, wherein:
the receiving unit comprises two lenses and a photodiode which are sequentially arranged, the two lenses are used for compressing light beams emitted by the wireless communication node and then gathering the light beams on the photodiode, and the photodiode is used for converting the light beams into electric signals which can be used by a user.
3. The phased array based wireless communication system of claim 1, wherein: all beams output by the grating array are deflected by the same angle.
4. The phased array based wireless communication system of claim 1, wherein: all beams output by the grating array are deflected at different angles.
5. A wireless communication method based on the phased array based wireless communication system according to any of claims 1 to 4, comprising the steps of:
obtaining voltage data corresponding to each heating unit according to the position distribution and access conditions of all users, and storing the voltage data in a control and storage module;
when the wireless communication node receives a signal which is ready for accessing by a user, the control and storage module controls the voltage of all output ends of the multi-channel voltage source according to the stored voltage data;
the beam splitter divides the optical fiber light beam into multi-channel light beams and outputs the multi-channel light beams, each heating unit carries out different phase modulation on the light beam of the corresponding channel according to the voltage of the corresponding output end of the multi-channel voltage source, and the grating array receives the output light beams of all the heating units and outputs the deflected light beams.
6. The phased array based wireless communication method of claim 5, wherein: when only one user accesses, all the beams output by the grating array are deflected by the same angle and are deflected to the position of the user.
7. The phased array based wireless communication method of claim 5, wherein: when at least two users access, all the light beams output by the grating array are deflected at different angles, and all the light beams are deflected to the positions of all the users on average.
8. The phased array based wireless communication method of claim 5, wherein: when the access condition of a user is changed, the voltages of all output ends of the multi-channel voltage source are readjusted to adjust the deflection state of the light beams output by the grating array.
9. The phased array based wireless communication method of claim 8, wherein:
when wireless communication is provided for a single user, if the position of the user changes, the deflection angle of the light beam is readjusted according to the position distribution condition of the user after the change, so that the light beam is deflected to the position of the user after the change.
10. The phased array based wireless communication method of claim 8, wherein:
when wireless communication is provided for a plurality of users, if a user is connected or disconnected, the deflection angle of the light beam needs to be adjusted again according to the position distribution condition of all the currently connected users, so that the light beam is deflected to the positions of all the currently connected users.
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