CN110730042B - Communication method and device - Google Patents
Communication method and device Download PDFInfo
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- CN110730042B CN110730042B CN201910828512.XA CN201910828512A CN110730042B CN 110730042 B CN110730042 B CN 110730042B CN 201910828512 A CN201910828512 A CN 201910828512A CN 110730042 B CN110730042 B CN 110730042B
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Abstract
The application is applicable to the technical field of computer application, and provides a communication method and a communication device, wherein the communication method comprises the following steps: acquiring the information of an electric signal to be transmitted; determining transmitting information corresponding to the electric signal information according to a preset vortex sound field generation mode; converting the electric signal information into vortex sound field signals corresponding to the transmitting information through a preset transmitting transducer array; and transmitting the vortex sound field signal. The transmitting information of vortex sound field signals corresponding to the electric signal information is determined according to a preset vortex sound field generating mode, and any vortex sound field is generated or received through a preset underwater transducer array, so that the core sound field transmission of vortex sound communication is realized, and the distortion of underwater transmitted signals in the encoding and decoding process is reduced.
Description
Technical Field
The present application relates to the field of computer application technologies, and in particular, to a communication method and apparatus.
Background
The ocean is an important field for human survival activity, the consumption of human resources is increased rapidly with the further development of human civilization, and the ocean resources must be understood, developed and utilized to maintain the further development of human. Acoustic waves are the only signals that can propagate in the ocean in a radiation form for a long distance, and underwater acoustic communication is one of the important technologies to be solved for developing the ocean. The principle of underwater acoustic communication is that an underwater acoustic transmitting transducer emits sound waves carrying information, the sound waves are conducted to an underwater acoustic receiving transducer through the sea, and the underwater acoustic receiving transducer converts the sound waves into electric signals and processes the electric signals to restore the information content.
In order to increase the channel capacity of communication signals, time division multiplexing and frequency division multiplexing processing methods are currently used, and the main principle is based on encoding information in carrier waves of different time periods or different frequency ranges. In the prior art, frequency or time freedom is generally used as a base vector of coding, but as the information amount increases, only frequency or time freedom is used as a base vector of coding, and the total capacity of a channel is limited. In addition, if the transmitted signal is aliased in the frequency or time dimension, the decoded signal will be distorted greatly.
Disclosure of Invention
In view of this, embodiments of the present application provide a communication method and apparatus, which can solve the problem that a coding and decoding method in the prior art is prone to cause large signal distortion during transmission.
A first aspect of an embodiment of the present application provides a signal transmission method, including:
acquiring electrical signal information to be transmitted;
determining transmitting information corresponding to the electric signal information according to a preset vortex sound field generation mode;
converting the electric signal information into vortex sound field signals corresponding to the transmitting information through a preset transmitting transducer array;
and transmitting the vortex sound field signal.
Wherein, the determining the transmitting information corresponding to the electrical signal information according to the preset vortex sound field generating mode comprises:
determining the transmitting phase and amplitude of the electric signal information corresponding to each array element according to the preset generating mode of the vortex sound field with different topological charge numbers; or
And determining the intensity and the phase of the electric signal information corresponding to each array element according to a preset generation mode of any vortex sound field.
Wherein the transmitting the vortex acoustic field signal comprises:
loading at least two independent vortex sound field signals which do not interfere with each other in a preset frequency band;
and sending the vortex sound field signals loaded with the at least two channels of vortex sound field signal frequency bands to a preset signal receiving device.
Wherein, the amplitude of the electric signal information corresponding to each array element is a preset constant; in the preset generation mode of the vortex sound field with different topological charge numbers, the transmission phase of the electric signal information corresponding to each array element is as follows:
wherein, thetaOAMUsed for representing the transmitting phase of each array element, l is used for representing the topological charge number of the vortex sound field corresponding to the array element,
and r is used for respectively representing the polar angle and the polar diameter of each array element under the polar coordinate taking the vortex center as the pole, and alpha is used for representing the rotation of the vortex.
In the generation mode according to the preset arbitrary vortex sound field, the intensity of the electric signal information corresponding to each array element is as follows:
wherein the content of the first and second substances,
polar angles under polar coordinates of vortex fields with vortex centers as poles and different topological charge numbers are respectively used for representing; I1-I8 are respectively used for representing the intensities of vortex fields with different topological charge numbers;
in the preset generation mode of any vortex sound field, the phase of the electric signal information corresponding to each array element is as follows:
the transmitting transducer array is a plane array or a cambered surface array formed by a plurality of transmitting transducers, wherein the transmitting transducers are arranged in a rectangular coordinate arrangement, a polar coordinate arrangement or a spiral arrangement.
A second aspect of an embodiment of the present application provides a signal receiving method, including:
receiving vortex sound field signals;
converting the vortex sound field signals into corresponding transmitting information through a preset receiving transducer array;
and decoding and reconstructing the transmitting information according to a preset information decoding and reconstructing mode to obtain the electric signal information corresponding to the vortex sound field signal.
A third aspect of the embodiments of the present application provides a signal transmitting apparatus, including:
the generating unit is used for acquiring the information of the electric signal to be transmitted;
the determining unit is used for determining the transmitting information corresponding to the electric signal information according to a preset vortex sound field generating mode;
the sound field unit is used for converting the electric signal information into vortex sound field signals corresponding to the transmitting information through a preset transmitting transducer array;
and the sending unit is used for transmitting the vortex sound field signal.
A fourth aspect of the embodiments of the present application provides a signal transmitting apparatus, including: the device comprises a processor, an input device, an output device and a memory, wherein the processor, the input device, the output device and the memory are connected with each other, the memory is used for storing a computer program for supporting an apparatus to execute the method, the computer program comprises program instructions, and the processor is configured to call the program instructions to execute the method of the first aspect.
A fifth aspect of embodiments of the present application provides a computer-readable storage medium having stored thereon a computer program comprising program instructions which, when executed by a processor, cause the processor to perform the method of the first aspect described above.
A sixth aspect of the embodiments of the present application provides a signal receiving apparatus, including:
a receiving unit for receiving vortex sound field signals;
the energy-surrounding unit is used for converting the vortex sound field signals into corresponding transmitting information through a preset receiving transducer array;
and the reconstruction unit is used for decoding and reconstructing the transmitting information according to a preset information decoding reconstruction mode to obtain the electric signal information corresponding to the vortex sound field signal.
A seventh aspect of an embodiment of the present application provides a signal receiving apparatus, including: a processor, an input device, an output device and a memory, the processor, the input device, the output device and the memory being interconnected, wherein the memory is configured to store a computer program that supports an apparatus to perform the above method, the computer program comprising program instructions, the processor being configured to invoke the program instructions to perform the above method of the second aspect.
An eighth aspect of embodiments of the present application provides a computer-readable storage medium storing a computer program comprising program instructions that, when executed by a processor, cause the processor to perform the method of the second aspect described above.
A ninth aspect of the embodiments of the present application provides a communication method, including:
acquiring electrical signal information to be transmitted;
determining transmitting information corresponding to the electric signal information according to a preset vortex sound field generation mode;
converting the electric signal information into vortex sound field signals corresponding to the transmitting information through a preset transmitting transducer array;
transmitting the vortex acoustic field signal;
receiving the vortex acoustic field signal;
converting the vortex sound field signals into corresponding transmitting information through a preset receiving transducer array;
and decoding and reconstructing the transmitting information according to a preset information decoding and reconstructing mode to obtain the electric signal information corresponding to the vortex sound field signal.
A tenth aspect of an embodiment of the present application provides a communication system, including:
the signal transmitting device is used for acquiring the information of the electric signal to be transmitted; determining transmitting information corresponding to the electric signal information according to a preset vortex sound field generation mode; converting the electric signal information into vortex sound field signals corresponding to the transmitting information through a preset transmitting transducer array; transmitting the vortex acoustic field signal;
the signal receiving device is used for receiving the vortex sound field signal; converting the vortex sound field signals into corresponding transmitting information through a preset receiving transducer array; and decoding and reconstructing the transmitting information according to a preset information decoding and reconstructing mode to obtain the electric signal information corresponding to the vortex sound field signal.
Compared with the prior art, the embodiment of the application has the advantages that:
acquiring the information of an electric signal to be transmitted; determining transmitting information corresponding to the electric signal information according to a preset vortex sound field generation mode; converting the electric signal information into vortex sound field signals corresponding to the transmitting information through a preset transmitting transducer array; and transmitting the vortex sound field signal. The transmitting information of vortex sound field signals corresponding to the electric signal information is determined according to a preset vortex sound field generating mode, and any vortex sound field is generated or received through the preset transducer array, so that the core sound field transmission of vortex sound communication is realized, and the distortion of underwater transmitted signals in the encoding and decoding process is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a flowchart of a signal transmission method according to an embodiment of the present application;
FIG. 2 is a diagram of an experimental transducer array according to an embodiment of the present disclosure;
FIG. 3 is a diagram of the emission phase of a vortex acoustic field with different topological charge numbers according to an embodiment of the present application;
FIG. 4 is a schematic diagram of the amplitude and phase of a cross section of a vortex acoustic field perpendicular to the propagation direction and with different topological charge numbers provided in an embodiment of the present application;
fig. 5 is a flowchart of a signal receiving method according to a second embodiment of the present application;
fig. 6 is a flowchart of a signal transmitting apparatus and a signal receiving apparatus in communication according to a second embodiment of the present application;
FIG. 7 is a schematic diagram of an array shape of a transducer array unit provided in the second embodiment of the present application;
FIG. 8 is a schematic diagram of orthogonality of vortex sound fields of different orders provided in embodiment two of the present application;
FIG. 9 is a diagram of the sound intensity amplitude distribution of figures 0-9 obtained from theory and experiment provided in example two of the present application;
FIG. 10 is a diagram illustrating the phase distribution of sound field of figures 0-9 obtained from theory and experiment provided in the second embodiment of the present application;
fig. 11 is a schematic diagram of signal decoding of a transducer array provided in the second embodiment of the present application;
fig. 12 is a schematic diagram of a signal transmitting apparatus according to a third embodiment of the present application;
fig. 13 is a schematic diagram of a signal transmitting apparatus according to a fourth embodiment of the present application;
fig. 14 is a schematic diagram of a signal receiving apparatus according to a fifth embodiment of the present application;
fig. 15 is a schematic diagram of a signal receiving apparatus according to a sixth embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
In order to explain the technical solution described in the present application, the following description will be given by way of specific examples.
Referring to fig. 1, fig. 1 is a flowchart of a signal transmission method according to an embodiment of the present application. The main implementation of the signal transmission method in this embodiment is a device with a signal transmission function, such as a signal transmission device. The signal transmission method as shown in the figure may include the steps of:
s101: and acquiring the information of the electric signal to be transmitted.
The ocean is an important field for human survival activity, the consumption of human resources is increased rapidly with the further development of human civilization, and the ocean resources must be understood, developed and utilized to maintain the further development of human. Acoustic waves are the only signals that can propagate in the ocean in a radiation form for a long distance, and underwater acoustic communication is one of the important technologies to be solved for developing the ocean. The principle of underwater acoustic communication is that an underwater acoustic transducer is used for emitting sound waves carrying information, the sound waves are conducted to an underwater acoustic receiving transducer through the sea and converted into electric signals, and the information content is restored through signal and information processing. Orbital angular momentum in a vortex sound field can be used as a new degree of freedom independent of time and frequency, and becomes a brand new choice for expanding the capacity of an acoustic communication signal transmission channel. The embodiment provides an array structure based on orbital angular momentum remote communication and an excitation method thereof, and provides a new sound field implementation means for realizing underwater communication based on a vortex sound field.
When signals are transmitted underwater, the information of the electric signals to be transmitted is obtained first. The non-electrical physical quantity is the most widely used signal because it can be easily converted into an electrical signal by various sensors, and the electrical signal is easy to transmit and control. An electrical signal refers to a voltage or current that varies with time, and thus can be mathematically expressed as a function of time and its waveform can be plotted. The information to be transmitted is generated in the present embodiment in the form of an electrical signal.
S102: and determining the transmitting information corresponding to the electric signal information according to a preset vortex sound field generating mode.
Vortex acoustic communication proposed in the prior art is based on a transducer or an acoustic artificial structure in the air, and cannot be directly applied to a water environment. The array structure for the remote communication of the vortex sound field and the excitation method thereof are designed based on the water environment, can directly generate and receive the vortex sound field, and can really realize dynamic, efficient and large-capacity sound information transmission.
The vortex sound field in the present embodiment refers to a sound field having a spiral phase, and can be expressed as p (r) ═ p (r, z) e mathematically-ikzeiφHere, the
The wave vector used for representing the sound beam, p (r, z) is used for representing the radial distribution of the sound field at z, phi is m theta is used for representing the spiral phase, theta is used for representing the azimuth angle size, and m is constant integer and used for representing the topological charge number or the order of the vortex field. In the embodiment, the topological charge number is used for representing the number of times of wave front torsion in the propagation distance of one wavelength, and the larger the value of | m | is, the faster the wave front rotates along the axis is represented; m is positive or negativeIt means that the direction of torsion is a forward direction or a reverse direction.
Further, step S102 may specifically include steps S1021 to S1022:
s1021: and determining the transmitting phase and amplitude of the electric signal information corresponding to each array element according to the preset generation mode of the vortex sound field with different topological charge numbers.
In this embodiment, generation modes of each array element in the vortex sound field with different topological charge numbers are preset, and specifically, step S1021 may include:
the amplitude of the electric signal information corresponding to each array element is a preset constant; in the preset generation mode of the vortex sound field with different topological charge numbers, the transmission phase of the electric signal information corresponding to each array element is as follows:
wherein, thetaOAMUsed for representing the transmitting phase of each array element, l is used for representing the topological charge number of the vortex sound field corresponding to the array element,
and r is used for respectively representing the polar angle and the polar diameter of each array element under the polar coordinate taking the vortex center as the pole, and alpha is used for representing the rotation of the vortex.
In the embodiment, the vortex sound field signal is generated according to the transmitting phase information by determining the transmitting phase information corresponding to the current electrical signal information.
Further, this embodiment further includes: the transmitting transducer array is a plane array or a cambered surface array formed by a plurality of transmitting transducers, wherein the transmitting transducers are arranged in a rectangular coordinate arrangement, a polar coordinate arrangement or a spiral arrangement. The transmitting transducer array is arranged in a signal transmitting device and used for generating vortex sound fields with different topological charge numbers so as to carry out vortex sound communication based on the vortex sound fields; and the receiving transducer array is arranged in the signal receiving device corresponding to the transmitting transducer and used for receiving any vortex sound field underwater.
Specifically, referring to fig. 2, fig. 2 is a transducer array for experiments according to an embodiment of the present application, which is a transducer array with 16 × 16 array elements arranged in a square, and the operating center frequency is 1 MHz. The excitation and receiving system in the embodiment adopts a Verasonics Vantage 256system excitation system, and the system can independently control the transmitting phase and amplitude of each array element. Calculating the transmitting phase and amplitude of each array element according to the following formula:
wherein, thetaOAMUsed for representing the transmitting phase of each array element, l is used for representing the topological charge number of the vortex sound field corresponding to the array element,
and r is respectively used for representing the polar angle and the polar diameter of each array element under the polar coordinate taking the vortex center as the pole, and alpha is used for representing the rotation of the vortex; a represents the transmitting amplitude of each array element and is a constant, i.e. the transmitting amplitude of all array elements is the same.
Referring to fig. 3, fig. 3 is a phase diagram of the emission of the vortex sound field with different topological charge numbers according to an embodiment of the present application, where fig. 3 shows the emission phase of the vortex sound field when the topological charge number I is 1, -1, 4, and-4 by using different pixel colors, where the color depths of different pixels are used to show different phase sizes, and x and y are respectively used to show the corresponding pixel bits in different directions in the vortex sound field.
Referring to fig. 4, fig. 4 is a schematic diagram of amplitude and phase of a cross section perpendicular to a propagation direction of a vortex sound field with different topological charge numbers according to an embodiment of the present disclosure, where fig. 4 shows, by using different pixel colors, amplitude and phase changes of the cross section perpendicular to the propagation direction of the vortex sound field when the topological charge numbers I are +1, -1, +2, -2, +3, -3, +4, and-4, where color depths of different pixels are used to show different amplitude and phase magnitudes.
S1022: and determining the intensity and the phase of the electric signal information corresponding to each array element according to a preset generation mode of any vortex sound field.
In this embodiment, a generation manner of any vortex sound field in any vortex sound field signal is preset, and specifically, step S1022 may include:
in the preset generation mode of any vortex sound field, the strength of the electric signal information corresponding to each array element is as follows:
wherein the content of the first and second substances,
polar angles under polar coordinates of vortex fields with vortex centers as poles and different topological charge numbers are respectively used for representing; i is1～I8Respectively representing the intensities of the vortex fields with different topological charge numbers;
in the preset generation mode of any vortex sound field, the phase of the electric signal information corresponding to each array element is as follows:
in particular, the vortex sound fields with different topological charge numbers are orthogonal to each other because
Therefore, the mutual orthogonality among vortex sound fields with different topological charge numbers can be utilized, the simultaneous transmission of multiple independent and non-interfering signals in the same frequency band is realized, and the utilization rate and the communication rate of a frequency spectrum are greatly improved. For example, the topological charge-number vortex sound field of-4 to-1, and 1 to 4 can be used as the basic mode, and the phase of any signal can be calculated as:
the sound field intensity of any signal is:
for example, the american standard code for information exchange corresponding to the number "1" is encoded to 00010001, and thus, the sound field shape corresponding to the number 1 is obtained after the-1 mode vortex sound field and the 4 mode vortex sound field are superimposed.
S103: and converting the electric signal information into vortex sound field signals corresponding to the transmitting information through a preset transmitting transducer array.
The preset transmitting transducer array adopted in the embodiment generates single or multiple vortex sound fields with different topological charge numbers, for example, a 16-by-16 transmitting transducer array is adopted, and the single or multiple vortex sound fields with different topological charge numbers are generated by independently controlling the phase and amplitude of each array element. Therefore, the transducer array can also be used as a configuration element in a signal receiving device, and can receive and detect a vortex sound field carrying information.
S104: and transmitting the vortex sound field signal.
And after generating the vortex sound field signal, transmitting the vortex sound field signal to a preset signal receiving device through water. The vortex acoustic field generated or received by the transducer array of the present embodiment may be used directly for signal communication. California university proposes an acoustic orbital angular momentum communication technique based on an active transducer array. The principle is that a phased array formed by signals of composite vortex state codes radiated by 64 loudspeakers generates an acoustic vortex field containing 8 topological charges, and another acoustic phased array is used for receiving and demodulating at a receiving end. However, the transducer is a low-frequency micro-horn propagating in the air, and the sound field cannot be generated in a manner suitable for signal communication. Nanjing university is based on the addition and subtraction cascade transportation of acoustic orbital angular momentum by using acoustic resonance type metamaterial, a sound source transducer of the transport system only uses a single acoustic microphone, and related experiments are completed in air sound. But because the special acoustic structure and the conduction sound field need to be realized in an acoustic rigid structure, under the current experimental conditions, the similar function is difficult to realize in the underwater acoustic system. In the embodiment, any vortex sound field is generated or received by using the transducer array, so that the core sound field propagation of vortex sound communication is realized.
Further, step S104 may include: loading at least two independent vortex sound field signals which do not interfere with each other in a preset frequency band; and sending the vortex sound field signals loaded with the at least two channels of vortex sound field signal frequency bands to a preset signal receiving device.
Specifically, the vortex sound field refers to a sound field having a spiral phase, and can be expressed as p (r) ═ p (r, z) e mathematically-ikzeiφHere, the
Is the wave vector of the acoustic beam, p (r, z) is the radial distribution of the acoustic field at z, phi is m theta is the helical phase, theta is the azimuth magnitude, and m is the order of the topological charge or the vortex field, which is constant integer. The topological charge number is defined as the number of times of wave front torsion in the propagation distance of one wavelength, and the larger the value of | m | is, the faster the wave front rotates along the axis is; m is positive or negative, indicating that the twist direction is positive or negative. The vortex sound fields with different topological charge numbers are mutually orthogonal because
Therefore, the mutual orthogonality among vortex sound fields with different topological charge numbers can be utilized to realize that multiple paths of signals which are independent and do not interfere with each other are transmitted simultaneously in the same frequency band, the utilization rate and the communication rate of frequency spectrums are greatly improved, and the channel capacity of communication signals is also improved.
According to the scheme, the electric signal information to be transmitted is acquired; determining transmitting information corresponding to the electric signal information according to a preset vortex sound field generation mode; converting the electric signal information into vortex sound field signals corresponding to the transmitting information through a preset transmitting transducer array; and transmitting the vortex sound field signal. The transmitting information of vortex sound field signals corresponding to the electric signal information is determined according to a preset vortex sound field generating mode, and any vortex sound field is generated or received through the preset transducer array, so that the core sound field propagation of vortex sound communication is realized, and the distortion of the transmitted signals in the encoding and decoding processes is reduced.
Referring to fig. 5, fig. 5 is a flowchart of a signal receiving method according to a second embodiment of the present application. The main executing body of the signal receiving method in this embodiment is a device with a signal receiving function, such as a signal receiving device, and the signal receiving device in this embodiment corresponds to the signal transmitting device in the first embodiment one to one in the signal communication process, and the function of the signal receiving device is not described herein again. The signal receiving method as shown in the figure may include the steps of:
s501: a vortex acoustic field signal is received.
In the embodiment, any vortex sound field is generated or received by using the underwater receiving transducer array, so that the core sound field propagation of vortex sound communication is realized. The signal receiving device of the present embodiment is a device for converting sound energy into electric energy or converting electric energy into sound energy, and the microphone, the speaker and the earphone in the electroacoustic engineering are the most typical devices for converting electric energy and sound energy into each other, which are collectively called as electroacoustic transducers. Vortex sound field signals emitted by the signal emitting device can be received through a receiving transducer array in the signal receiving device.
Referring to fig. 6, fig. 6 is a flowchart illustrating a communication between a signal transmitting device and a signal receiving device according to the present embodiment. According to the example in fig. 6, in this embodiment, an information electrical signal is generated at a signal transmitting device, the information electrical signal is transmitted through a preset transducer to obtain N transducer elements, and then the N transducer elements are encoded into vortex sound field signals and transmitted, and the vortex sound field signals are transmitted to a receiving end. And receiving the acoustic vortex coding at a receiving end through a signal receiving device to obtain N transducer elements, and finally decoding the transducer elements to obtain original electric signal information, which is a communication interaction mode between the signal transmitting device in the first embodiment and the signal receiving device in the second embodiment.
Referring to fig. 7, fig. 7 is a schematic diagram illustrating an arrangement shape of a transducer array unit according to a second embodiment. The transducer arrays in this embodiment include, but are not limited to, transmit transducer arrays and receive transducer arrays. As shown in the figure, the transducer array of this embodiment is a planar array or an arc array composed of a plurality of transducers, where the arrangement of the plurality of transmitting transducers is rectangular coordinate arrangement, polar coordinate arrangement or spiral arrangement, and the transmitting transducer array in this embodiment may be a planar array or an arc array, and is not limited herein. Such as the array element planar circular arrangement 1, the array element planar circular arrangement 2 and the array element arc arrangement in fig. 7. The working frequency of the transducer array of the embodiment is 10Hz-5MHz of the working frequency of underwater acoustic communication.
S502: and converting the vortex sound field signals into corresponding transmitting information through a preset receiving transducer array.
In one embodiment, a preset receiving transducer array is used to generate single or multiple vortex sound fields with different topological charges, for example, a 16-by-16 receiving transducer array can be used to generate single or multiple vortex sound fields with different topological charges by independently controlling the phase and amplitude of each array element. Therefore, the receiving transducer array is installed in a signal receiving device and used for receiving and detecting a vortex sound field carrying information. And after receiving the vortex sound field signals, enabling the vortex sound field signals to pass through a preset receiving transducer array to obtain the transmitting information of the vortex sound field signals.
S503: and decoding and reconstructing the transmitting information according to a preset information decoding and reconstructing mode to obtain the electric signal information corresponding to the vortex sound field signal.
The strength and the phase of a transmission sound field are directly received by a receiving transducer array at a receiving end, and inner product operation is respectively carried out on the strength and the phase and the vortex fields with topological charge numbers of-4, -3, -2, -1, 1, 2, 3 and 4, so that information decoding reconstruction of a spiral mode is realized, an electric signal is obtained, and information communication is realized.
The embodiment has been verified by simulation and experiment, and the result is feasible. First, we verify the orthogonality of the vortex sound fields of different orders by theory and experiment, please refer to fig. 8 together, and fig. 8 is a schematic diagram of the orthogonality of the vortex sound fields of different orders according to the second embodiment of the present application, where fig. 8(a) is a simulation result and fig. 8(b) is an experiment result. The plane axis respectively represents vortex field OAM corresponding to different topological charge numbers, and the vertical axis is used for representing an orthogonality parameter.
Further theoretical and experimentally obtained field intensity and phase maps for numbers 0-9, respectively, are shown in fig. 9-11. Fig. 9 is a schematic diagram of sound intensity amplitude distribution of numbers 0 to 9 obtained by theory and experiment provided in the second embodiment of the present application, and the color depth of pixels in an image is used to represent the magnitude of the sound intensity amplitude; fig. 10 is a diagram of sound field phase distributions of numbers 0 to 9 obtained by theory and experiment provided in the second embodiment of the present application, and the pixel color shade in the image is used to indicate the magnitude of the sound field phase. In addition, the received vortex signals are decoded to obtain the information of the letters 'Nature', and the theory is consistent with the experiment; fig. 11 is a schematic diagram of signal decoding of a receiving transducer array provided in the second embodiment of the present application, where (a) is a simulation result, and (b) is an experimental result, where a plane axis represents respectively vortex field OAM corresponding to different topological charge numbers, and a vertical axis represents signal intensity, and performing a decoding process on a letter "Nature" signal by using the receiving transducer array is to perform inner product on a received sound field signal and vortex sound fields with different topological charge numbers to obtain signal intensity of the vortex field with each topological charge number, that is, decodable information.
According to the scheme, vortex sound field signals are received; converting the vortex sound field signals into corresponding transmitting information through a preset receiving transducer array; and decoding and reconstructing the transmitting information according to a preset information decoding and reconstructing mode to obtain the electric signal information corresponding to the vortex sound field signal. In the embodiment, the vortex sound field signals are converted into corresponding transmitting information through the preset receiving transducer array, decoding reconstruction is performed through the preset underwater receiving transducer array, electric signal information corresponding to the vortex sound field signals is obtained, core sound field propagation of vortex sound communication is achieved, and distortion of underwater transmission signals in the encoding and decoding processes is reduced.
Referring to fig. 12, fig. 12 is a schematic diagram of a signal transmitting apparatus according to a third embodiment of the present invention. The signal transmitting apparatus comprises units for performing the steps in the corresponding embodiment of fig. 1. Please refer to fig. 1 for the related description of the corresponding embodiment. For convenience of explanation, only the portions related to the present embodiment are shown. The signal transmitting apparatus 1200 of the present embodiment includes:
a generating unit 1201, configured to acquire electrical signal information to be transmitted;
a determining unit 1202, configured to determine, according to a preset vortex sound field generation manner, transmission information corresponding to the electrical signal information;
a sound field unit 1203, configured to convert the electrical signal information into a vortex sound field signal corresponding to the transmitting information through a preset transmitting transducer array;
a sending unit 1204, configured to emit the vortex sound field signal.
Further, the determining unit 1202 includes:
the first determining unit is used for determining the transmitting phase and amplitude of the electric signal information corresponding to each array element according to the preset generation mode of vortex sound fields with different topological charge numbers; or
And the second determining unit is used for determining the intensity and the phase of each array element corresponding to the electric signal information according to a preset generation mode of any vortex sound field.
Further, the sending unit 1204 includes:
the loading unit is used for loading at least two paths of vortex sound field signals which are independent from each other and do not interfere with each other in a preset frequency band;
and the carrier wave sending unit is used for sending the vortex sound field signals loaded with the at least two channels of vortex sound field signal frequency bands to a preset signal receiving device.
Furthermore, the amplitude of the electric signal information corresponding to each array element is a preset constant; in the preset generation mode of the vortex sound field with different topological charge numbers, the transmission phase of the electric signal information corresponding to each array element is as follows:
wherein, thetaOAMFor representing the transmit phase of each array element,/, for representing the arrayThe topological charge of the vortex acoustic field corresponding to the element,
and r is used for respectively representing the polar angle and the polar diameter of each array element under the polar coordinate taking the vortex center as the pole, and alpha is used for representing the rotation of the vortex.
Further, in the preset generation mode of any vortex sound field, the intensity of the electric signal information corresponding to each array element is as follows:
wherein the content of the first and second substances,
polar angles under polar coordinates of vortex fields with vortex centers as poles and different topological charge numbers are respectively used for representing; i is1～I8Respectively representing the intensities of the vortex fields with different topological charge numbers;
in the preset generation mode of any vortex sound field, the phase of the electric signal information corresponding to each array element is as follows:
the transmitting transducer array is a plane array or a cambered surface array formed by a plurality of transmitting transducers, wherein the transmitting transducers are arranged in a rectangular coordinate arrangement, a polar coordinate arrangement or a spiral arrangement.
According to the scheme, the electric signal information to be transmitted is acquired; determining transmitting information corresponding to the electric signal information according to a preset vortex sound field generation mode; converting the electric signal information into vortex sound field signals corresponding to the transmitting information through a preset transmitting transducer array; and transmitting the vortex sound field signal. The transmitting information of vortex sound field signals corresponding to the electric signal information is determined according to a preset vortex sound field generating mode, and any vortex sound field is generated or received through a preset underwater transducer array, so that the core sound field transmission of vortex sound communication is realized, and the distortion of underwater transmitted signals in the encoding and decoding process is reduced.
Fig. 13 is a schematic diagram of a signal transmitting apparatus according to a fourth embodiment of the present invention. As shown in fig. 13, the signal transmission device 13 of this embodiment includes: a processor 1300, a memory 1301, and a computer program 1303 stored in the processor 1302 and operable on the processor 1301. The processor 1301, when executing the computer program 1303, implements the steps in the above-described embodiments of the signal transmission method, such as steps 101 to 104 shown in fig. 1. Alternatively, the processor 1301, when executing the computer program 1303, implements the functions of each module/unit in each device embodiment, for example, the functions of the units 1201 to 1204 shown in fig. 12.
Illustratively, the computer program 1303 may be partitioned into one or more modules/units, which are stored in the processor 1302 and executed by the processor 1301, to implement the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used for describing the execution process of the computer program 1303 in the signal transmitting apparatus 13.
The signal emitting device 13 may be a desktop computer, a notebook, a palm computer, a cloud server, or other computing devices. The signal transmitting device may include, but is not limited to, processor 1301, processor 1302. Those skilled in the art will appreciate that fig. 13 is only an example of the signal transmitting apparatus 13, and does not constitute a limitation to the signal transmitting apparatus 13, and may include more or less components than those shown, or combine some components, or different components, for example, the signal transmitting apparatus may further include an input-output device, a network access device, a bus, and the like.
The Processor 1301 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The processor 1302 may be an internal storage unit of the signal transmitting apparatus 13, such as a hard disk or a memory of the signal transmitting apparatus 13. The processor 1302 may also be an external storage device of the signal transmitting apparatus 13, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card, FC), etc. provided on the signal transmitting apparatus 13. Further, the processor 1302 may also include both an internal storage unit and an external storage device of the signal transmitting apparatus 13. The processor 1302 is adapted to store the computer programs and other programs and data required by the signal transmitting apparatus. The processor 1302 may also be used to temporarily store data that has been output or is to be output.
Referring to fig. 14, fig. 14 is a schematic diagram of a signal receiving apparatus according to a fifth embodiment of the present invention. The signal receiving apparatus comprises units for performing the steps in the corresponding embodiment of fig. 5. Please refer to fig. 5 for a related description of the embodiment. For convenience of explanation, only the portions related to the present embodiment are shown. The signal receiving apparatus 1400 of the present embodiment includes:
a receiving unit 1401 for receiving a vortex sound field signal;
the transduction unit 1402 is configured to convert the vortex sound field signal into corresponding transmission information through a preset receiving transducer array;
and a reconstructing unit 1403, configured to perform decoding reconstruction on the transmission information according to a preset information decoding reconstruction manner, so as to obtain electrical signal information corresponding to the vortex sound field signal.
The receiving transducer array is a planar array or a cambered array formed by a plurality of receiving transducers, wherein the receiving transducers are arranged in a rectangular coordinate arrangement, a polar coordinate arrangement or a spiral arrangement.
According to the scheme, vortex sound field signals are received; converting the vortex sound field signals into corresponding transmitting information through a preset receiving transducer array; and decoding and reconstructing the transmitting information according to a preset information decoding and reconstructing mode to obtain the electric signal information corresponding to the vortex sound field signal. In the embodiment, the vortex sound field signals are converted into corresponding transmitting information through the preset receiving transducer array, decoding reconstruction is performed through the preset underwater receiving transducer array, electric signal information corresponding to the vortex sound field signals is obtained, core sound field propagation of vortex sound communication is achieved, and distortion of underwater transmission signals in the encoding and decoding processes is reduced.
Fig. 15 is a schematic diagram of a signal receiving apparatus according to a sixth embodiment of the present invention. As shown in fig. 15, the signal receiving apparatus 15 of this embodiment includes: a processor 1501, a processor 1502, and a computer program 1503 stored in the processor 1502 and operable on the processor 1501. The processor 1501, when executing the computer program 1503, implements the steps in the various signal receiving method embodiments described above, such as the steps 501 to 503 shown in fig. 5. Alternatively, the processor 1501, when executing the computer program 1503, implements the functions of the modules/units in the device embodiments described above, such as the functions of the units 1401 to 1403 shown in fig. 14.
Illustratively, the computer program 1503 may be partitioned into one or more modules/units that are stored in the processor 1502 and executed by the processor 1501 to implement the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution process of the computer program 1503 in the signal receiving device 15.
The signal receiving device 15 may include, but is not limited to, a processor 1501 and a processor 1502. Those skilled in the art will appreciate that fig. 15 is only an example of the signal receiving apparatus 15, and does not constitute a limitation to the signal transmitting apparatus 15, and may include more or less components than those shown, or combine some components, or different components, for example, the signal transmitting apparatus may further include an input-output device, a network access device, a bus, and the like.
The Processor 1501 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The processor 1502 may be an internal storage unit of the signal receiving device 15, such as a hard disk or a memory of the signal receiving device 15. The processor 1502 may also be an external storage device of the signal receiving apparatus 15, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card, FC), and the like, provided on the signal receiving apparatus 15. Further, the processor 1502 may also include both an internal storage unit and an external storage device of the signal receiving apparatus 15. The processor 1502 serves to store the computer programs and other programs and data required by the signal receiving apparatus. The processor 1502 may also be used to temporarily store data that has been output or is to be output.
The computer readable storage medium may be an internal storage unit of the terminal according to any of the foregoing embodiments, for example, a hard disk or a memory of the terminal. The computer readable storage medium may also be an external storage device of the terminal, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like provided on the terminal. Further, the computer-readable storage medium may also include both an internal storage unit and an external storage device of the terminal. The computer-readable storage medium is used for storing the computer program and other programs and data required by the terminal. The computer readable storage medium may also be used to temporarily store data that has been output or is to be output.
The embodiment of the application further provides a communication method, which comprises the following steps:
acquiring electrical signal information to be transmitted;
determining transmitting information corresponding to the electric signal information according to a preset vortex sound field generation mode;
converting the electric signal information into vortex sound field signals corresponding to the transmitting information through a preset transmitting transducer array;
transmitting the vortex acoustic field signal;
receiving the vortex acoustic field signal;
converting the vortex sound field signals into corresponding transmitting information through a preset receiving transducer array;
and decoding and reconstructing the transmitting information according to a preset information decoding and reconstructing mode to obtain the electric signal information corresponding to the vortex sound field signal.
Specifically, in the communication method in this embodiment, the signal transmitting device and the signal receiving device are used to transmit and receive vortex sound field signals, so as to implement communication. The signal transmitting device generates vortex sound field signals to send the vortex sound field signals to the signal receiving device underwater, and the signal receiving device receives the vortex sound field signals and decodes the vortex sound field signals to obtain electric signal information. In the embodiment, the signal transmitting device is used for acquiring the electric signal information to be transmitted, and the transmitting information of the vortex sound field signal corresponding to the electric signal information is determined according to a preset vortex sound field generating mode; and according to the transmitting information of the vortex sound field signals, passing the electric signal information through a preset transducer array to generate vortex sound field signals, and sending the vortex sound field signals to a preset signal receiving device. The signal receiving device receives the vortex sound field signals sent by the signal transmitting device through a preset transducer array, and performs decoding reconstruction on the transmitting information according to a preset information decoding reconstruction mode to obtain electric signal information corresponding to the vortex sound field signals. For a specific communication method, please refer to the specific implementation manners provided in the first and second embodiments of the present application, which are not described herein again.
An embodiment of the present application further provides a communication system, including:
the signal transmitting device is used for acquiring the information of the electric signal to be transmitted; determining transmitting information corresponding to the electric signal information according to a preset vortex sound field generation mode; converting the electric signal information into vortex sound field signals corresponding to the transmitting information through a preset transmitting transducer array; transmitting the vortex acoustic field signal;
the signal receiving device is used for receiving the vortex sound field signal; converting the vortex sound field signals into corresponding transmitting information through a preset receiving transducer array; and decoding and reconstructing the transmitting information according to a preset information decoding and reconstructing mode to obtain the electric signal information corresponding to the vortex sound field signal.
Specifically, the communication system in this embodiment transmits and receives signals of a vortex sound field through the signal transmitting device and the signal receiving device, thereby realizing communication. The signal transmitting device generates vortex sound field signals to send the vortex sound field signals to the signal receiving device underwater, and the signal receiving device receives the vortex sound field signals and decodes the vortex sound field signals to obtain electric signal information. In the embodiment, the signal transmitting device is used for acquiring the electric signal information to be transmitted, and the transmitting information of the vortex sound field signal corresponding to the electric signal information is determined according to a preset vortex sound field generating mode; and according to the transmitting information of the vortex sound field signals, passing the electric signal information through a preset transducer array to generate vortex sound field signals, and sending the vortex sound field signals to a preset signal receiving device. And the signal receiving device receives the vortex sound field signals through a preset transducer array, and decodes and reconstructs the transmitting information according to a preset information decoding and reconstructing mode to obtain electric signal information corresponding to the vortex sound field signals. For the specific functions of the communication system, please refer to the specific implementation manners provided in the first and second embodiments of the present application, which are not described herein again.
Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described in a functional general in the foregoing description for the purpose of illustrating clearly the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the terminal and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed terminal and method can be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may also be an electric, mechanical or other form of connection.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiments of the present application. In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially or partially contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
While the invention has been described with reference to specific embodiments, the scope of the invention is not limited thereto, and those skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the invention. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (8)
1. A method of transmitting a signal, comprising:
acquiring electrical signal information to be transmitted;
determining transmitting information corresponding to the electric signal information according to a preset vortex sound field generation mode;
converting the electric signal information into vortex sound field signals corresponding to the transmitting information through a preset transmitting transducer array;
transmitting the vortex acoustic field signal;
the determining the transmitting information corresponding to the electrical signal information according to a preset vortex sound field generating mode comprises the following steps:
determining the transmitting phase and amplitude of the electric signal information corresponding to each array element according to the preset generating mode of the vortex sound field with different topological charge numbers; or
Determining the intensity and the phase of the electric signal information corresponding to each array element according to a preset generation mode of any vortex sound field;
the amplitude of the electric signal information corresponding to each array element is a preset constant; in the preset generation mode of the vortex sound field with different topological charge numbers, the transmission phase of the electric signal information corresponding to each array element is as follows:
wherein, thetaOAMUsed for representing the transmitting phase of each array element, l is used for representing the topological charge number of the vortex sound field corresponding to the array element,
and r is used for respectively representing the polar angle and the polar diameter of each array element under the polar coordinate taking the vortex center as the pole, and alpha is used for representing the rotation of the vortex.
2. The signal transmission method of claim 1, wherein said transmitting said vortical field signal comprises:
loading at least two independent vortex sound field signals which do not interfere with each other in a preset frequency band;
and sending the vortex sound field signals loaded with the at least two channels of vortex sound field signal frequency bands to a preset signal receiving device.
3. The signal transmission method according to claim 2, wherein in the preset generation mode of any vortex sound field, the intensity of the electrical signal information corresponding to each array element is as follows:
wherein the content of the first and second substances,
polar angles under polar coordinates of vortex fields with vortex centers as poles and different topological charge numbers are respectively used for representing; i is1～I8Respectively representing the intensities of the vortex fields with different topological charge numbers;
in the preset generation mode of any vortex sound field, the phase of the electric signal information corresponding to each array element is as follows:
4. the signal transmission method of any one of claims 1 to 3, wherein the transmitting transducer array is a planar array or a curved array of a plurality of transmitting transducers, wherein the arrangement of the plurality of transmitting transducers is a rectangular coordinate arrangement, a polar coordinate arrangement or a spiral arrangement.
5. A signal receiving method, comprising:
receiving vortex sound field signals;
converting the vortex sound field signals into corresponding transmitting information through a preset receiving transducer array, wherein the converting method comprises the following steps: generating a single or a plurality of vortex sound fields with different topological charge numbers by adopting a preset receiving transducer array, generating the single or the plurality of vortex sound fields with different topological charge numbers by independently controlling the phase and the amplitude of each array element, and obtaining the transmitting information of vortex sound field signals by enabling the vortex sound field signals to pass through the preset receiving transducer array after receiving the vortex sound field signals;
decoding and reconstructing the transmitting information according to a preset information decoding and reconstructing mode to obtain electric signal information corresponding to the vortex sound field signal; wherein, the intensity and phase of the sound field are directly received by using a receiving transducer array at a receiving end;
the amplitude of the electric signal information corresponding to each array element is a preset constant; in the case that the preset receiving transducer array generates a single or multiple vortex sound fields with different topological charge numbers, the transmission phase of the electric signal information corresponding to each array element is as follows:
wherein, thetaOAMUsed for representing the transmitting phase of each array element, l is used for representing the topological charge number of the vortex sound field corresponding to the array element,
and r is used for respectively representing the polar angle and the polar diameter of each array element under the polar coordinate taking the vortex center as the pole, and alpha is used for representing the rotation of the vortex.
6. A signal transmitting apparatus comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the steps of the method according to any of claims 1 to 4 are implemented when the computer program is executed by the processor.
7. A signal receiving apparatus comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the steps of the method according to claim 5 are implemented when the processor executes the computer program.
8. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 4 and/or the steps of the method according to claim 5.
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