Sensitivity fusion system based on multi-mode vortex electromagnetic waves and application method

Abstract

The invention discloses a multi-modal vortex electromagnetic wave-based flux-inductance fusion system and an application method, and relates to the technical field of wireless communication, and the specific steps are as follows: the multi-modal vortex electromagnetic wave-based flux-inductance fusion system obtains multi-modal vortex electromagnetic waves; modulating communication information on the vortex electromagnetic wave in the first mode, and transmitting multiple paths of communication information at the same time and at the same frequency; and carrying out target detection and sensing imaging on the vortex electromagnetic wave in the second mode, and obtaining sensing information at the same time. Communication information and sensing information can be modulated on different orbital angular momentum modes to achieve communication and inductance fusion, efficient utilization of hardware is achieved, vortex electromagnetic wave modulation is introduced, a natural orthogonal channel is provided for a sensing loop and a communication link in the communication and inductance fusion system, and the communication and inductance fusion efficiency is improved. And modulation and demodulation of the information are equivalent to inverse discrete Fourier transform operation, so that the signal processing difficulty is greatly reduced, and unification of communication sensing information processing and hardware structure design is realized.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technology, and more specifically to a synaesthesia fusion system based on multi-modal vortex electromagnetic waves and an application method thereof. Background Art

[0002] The high-frequency synaesthesia fusion system based on multi-modal vortex electromagnetic waves refers to a system that uses high-frequency multi-modal vortex electromagnetic waves to simultaneously realize communication and perception functions. The synaesthesia fusion system for the vision of interconnection of all things needs to realize the integration of communication and perception capabilities through the reuse of air interface resources such as time, frequency, power and hardware under the constraints of resources such as time, frequency and space, and the sharing of radio frequency links, and complete the two major tasks of communication information transmission and target information perception at the same time to improve resource utilization.

[0003] With the development of wireless communication technology, the carrier frequency bands of communication systems and perception systems have extended to high frequency bands. The terahertz band has ultra-large bandwidth spectrum resources and supports ultra-high-speed wireless communication. At the same time, it shows great application potential in the fields of high-speed communication and high-precision perception. The terahertz beam has strong directionality and is suitable for point-to-point high-speed communication, but this feature limits the use scenarios of the terahertz beam. In order to enhance the directionality of the terahertz beam, one solution is to use a phased antenna array in conjunction with a waveform shaping algorithm to achieve control of the terahertz beam direction, but this solution faces the problem of isolation between the perception loop and the communication link in the synaesthesia fusion system. Therefore, how to solve the above problems is an urgent problem for those skilled in the art. Summary of the invention

[0004] In view of this, the present invention provides a synaesthesia fusion system and application method based on multi-modal vortex electromagnetic waves, which overcome the above-mentioned defects.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] A multi-modal vortex electromagnetic wave synaesthesia fusion system, comprising:

[0007] An antenna array building module, used to evenly distribute multiple antenna array units on a circumference to form a uniform circular antenna array;

[0008] A phase excitation calculation module, used for calculating the phase excitation required to generate vortex electromagnetic waves of each mode according to the relationship between the modal value and the number of antenna array units;

[0009] A composite vortex electromagnetic wave generating module, used for superimposing the phase excitations of different modes on each of the antenna array units of the uniform circular antenna array to generate composite vortex electromagnetic waves carrying orbital angular momentum of different modes;

[0010] A synaesthesia fusion module, used for performing communication information modulation and perception information modulation on the composite modal vortex electromagnetic wave, respectively, to obtain a communication vortex electromagnetic wave and a perception vortex electromagnetic wave;

[0011] A transmitting module, used for transmitting the communication vortex electromagnetic wave and the perception vortex electromagnetic wave, and demodulating the perception vortex electromagnetic wave to obtain the distance and azimuth position information of the perception target;

[0012] The receiving module is used to demodulate the communication vortex electromagnetic wave to obtain communication information, and reflect the perception vortex electromagnetic wave to form a differential radiation field echo.

[0013] An application method of a synaesthesia fusion system of a multi-modal vortex electromagnetic wave, the specific steps are:

[0014] Acquiring the vortex electromagnetic waves of multiple modes based on the synaesthesia fusion system of multi-modal vortex electromagnetic waves;

[0015] Modulating communication information on the vortex electromagnetic wave of the first mode, and transmitting multiple communication information at the same frequency;

[0016] Target detection and perception imaging are performed on the vortex electromagnetic wave in the second mode, and perception information is obtained simultaneously.

[0017] Optionally, the steps of acquiring the vortex electromagnetic waves of multiple modes are:

[0018] Evenly distributing a plurality of the antenna array units on a circumference to form the uniform circular antenna array;

[0019] Based on the relationship between the modal value and the number of antenna array elements, the phase excitation required to generate the vortex electromagnetic wave of each mode is calculated;

[0020] The phase excitations of different modes are superimposed on each of the antenna array units of the uniform circular antenna array to generate composite vortex electromagnetic waves carrying orbital angular momentum of different modes.

[0021] Optionally, the calculation steps for generating the phase excitation required for the vortex electromagnetic wave of any mode are:

[0022] Exciting each antenna array unit of the uniform circular antenna array, and setting a continuously changing phase excitation delay between adjacent antenna array units;

[0023] The phase excitation required for each antenna array unit of the uniform circular antenna array to generate a vortex electromagnetic wave of any mode is calculated according to the phase excitation delay.

[0024] Optionally, the specific steps of modulating the communication information on the vortex electromagnetic wave of the first mode and simultaneously transmitting multiple channels of the communication information at the same frequency are:

[0025] Multiplying the phase excitation of the first mode by the communication information to obtain the communication vortex electromagnetic wave after modulation;

[0026] The communication vortex electromagnetic wave is transmitted through the channel to reach the receiving end, and is demodulated to obtain the communication information.

[0027] Optionally, the specific steps of performing target detection and perception imaging on the vortex electromagnetic wave of the second mode and acquiring the perception information are:

[0028] Multiplying the phase excitation of the second mode by the perception information to obtain the perception vortex electromagnetic wave after modulation;

[0029] The reflected differential radiation field echo is received and sampled, and the distance and azimuth position information of the perceived target is obtained according to the two-dimensional distribution of the sampled data in the spectrum-modal dimension.

[0030] Optionally, during the modulation process, the communication information and the perception information may be jointly modulated.

[0031] Optionally, the joint modulation method is joint multiplexing of two or more multiplexing modes.

[0032] It can be known from the above technical scheme that compared with the prior art, the present invention discloses a synaesthesia fusion system and application method based on multimodal vortex electromagnetic waves, which can realize synaesthesia fusion by modulating communication information and perception information respectively on different orbital angular momentum modes, realize efficient use of hardware, overcome the problem that the traditional communication system and the perception system each use a set of radio frequency transceiver devices and have low efficiency, and by introducing vortex electromagnetic wave modulation, a natural orthogonal channel is provided for the perception loop and communication link in the synaesthesia fusion system, and the modulation and demodulation of information are equivalent to performing inverse discrete Fourier transform operations, which greatly reduces the difficulty of signal processing, and realizes the unification of communication perception information processing and hardware structure design. At the same time, the vortex electromagnetic wave modulation method can be combined with other multiplexing technologies such as time division multiplexing, frequency division multiplexing and orthogonal frequency division multiplexing to jointly modulate information, and can jointly improve spectrum utilization and perception accuracy in dimensions such as time, frequency, and mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0034] Figure 1 The present invention provides a flow chart of the method. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] On the one hand, this embodiment discloses a multi-modal vortex electromagnetic wave synaesthesia fusion system, including:

[0037] An antenna array building module, used to evenly distribute multiple antenna array units on a circumference to form a uniform circular antenna array;

[0038] A phase excitation calculation module, used to calculate the phase excitation required to generate vortex electromagnetic waves of each mode according to the relationship between the modal value and the number of antenna array elements;

[0039] A composite vortex electromagnetic wave generation module is used to superimpose phase excitations of different modes on each antenna array unit of a uniform circular antenna array to generate composite vortex electromagnetic waves carrying orbital angular momentum of different modes;

[0040] A synaesthesia fusion module is used to perform communication information modulation and perception information modulation on the composite modal vortex electromagnetic wave to obtain a communication vortex electromagnetic wave and a perception vortex electromagnetic wave;

[0041] A transmitting module, used for transmitting the communication vortex electromagnetic wave and the perception vortex electromagnetic wave, and demodulating the perception vortex electromagnetic wave to obtain the distance and azimuth position information of the perception target;

[0042] The receiving module is used to demodulate the communication vortex electromagnetic wave to obtain communication information, and reflect the perception vortex electromagnetic wave to form a differential radiation field echo.

[0043] On the other hand, the present embodiment discloses an application method of a synaesthesia fusion system of a multi-modal vortex electromagnetic wave, which can realize the sharing and functional fusion of communication and perception radio frequency devices by modulating communication information and perception information onto vortex electromagnetic waves carrying different modal orbital angular momentum respectively, and realize the integration of communication and perception functions on a set of waveforms by utilizing the new modal dimension of vortex electromagnetic waves, such as Figure 1 As shown, the specific steps are:

[0044] Step 1, obtaining vortex electromagnetic waves of multiple modes based on the synaesthesia fusion system of multi-modal vortex electromagnetic waves;

[0045] Step 2, modulating communication information on the vortex electromagnetic wave of the first mode, and transmitting multiple communication information at the same frequency;

[0046] Step 3: Perform target detection and perception imaging on the vortex electromagnetic wave of the second mode, and obtain perception information at the same time.

[0047] Furthermore, the vortex electromagnetic wave of the first mode is a high-mode vortex electromagnetic wave with low beam divergence; and the vortex electromagnetic wave of the second mode is a low-mode vortex electromagnetic wave with high beam divergence.

[0048] In one embodiment, the steps of acquiring vortex electromagnetic waves of multiple modes are:

[0049] Step 11, uniformly distributing multiple antenna array units on a circle to form a uniform circular antenna array;

[0050] Step 12: Calculate the phase excitation required to generate vortex electromagnetic waves of each mode based on the relationship between the modal value and the number of antenna array elements;

[0051] Step 13: superimpose phase excitations of different modes on each antenna array unit of the uniform circular antenna array to generate composite vortex electromagnetic waves carrying orbital angular momentum of different modes.

[0052] In one embodiment, the calculation steps for generating the phase excitation required for the vortex electromagnetic wave of any mode are:

[0053] Step 121, exciting each antenna array unit of the uniform circular antenna array, and setting a continuously changing phase excitation delay between adjacent antenna array units;

[0054] Step 122: Calculate the phase excitation required for each antenna array unit of the uniform circular antenna array to generate a vortex electromagnetic wave of any mode according to the phase excitation delay.

[0055] Step 11 is specifically as follows: N isotropic antenna array units are evenly arranged on a circle with a radius of R to construct an N-element uniform circular antenna array.

[0056] Step 121 is specifically as follows: using a phase shift network to excite each radiating element of the N-element uniform circular antenna array, feeding the same amplitude excitation signal I to all array elements, and making a continuously changing phase excitation delay between adjacent antenna elements. Where l is the electromagnetic vortex mode value, and the phase excitation delay reflects the excitation of the electromagnetic vortex mode and the nth antenna array element.

[0057] Step 122 is specifically: calculating the feeding phase required for each element in the antenna array to generate a vortex electromagnetic wave carrying orbital angular momentum mode l1 Get the phase excitation matrix of mode l1

[0058] Calculate the feeding phase required for each element in the antenna array to generate a vortex electromagnetic wave carrying orbital angular momentum mode l2 Get the phase excitation matrix of mode l2

[0059]

[0060] Step 13 is specifically as follows: obtaining the phase excitation matrix of the electromagnetic vortex modes l1 and l2 generated by the phase shift network:

[0061]

[0062] The excitations required for different modes are superimposed and applied to each antenna element to generate composite vortex electromagnetic waves carrying orbital angular momentum of different modes.

[0063] In one embodiment, an N-element uniform circular antenna array can generate vortex electromagnetic waves with no more than N integer modal values. By utilizing the small size characteristics of high-frequency antenna array elements, a large-scale phased antenna array is constructed to generate vortex electromagnetic waves of multiple different modes. The vortex electromagnetic waves carrying different modes are strictly orthogonal to each other, forming independent vortex electromagnetic wave channels in the modal domain. Perception information and communication information can be modulated and carried on different modal channels for independent propagation and independent observation.

[0064] Furthermore, an N-element uniform circular antenna array can generate vortex electromagnetic waves with no more than N integer modal values, so the phase excitation matrix of the phase shift network can be expanded to:

[0065]

[0066] Taking advantage of the small size of high-frequency antenna elements, a large-scale phased antenna array is constructed to generate vortex electromagnetic waves. The vortex electromagnetic waves carrying different modes are strictly orthogonal to each other, thus forming independent channels in space. The vortex electromagnetic waves carrying perception information and communication information can be independently propagated and observed in different modal channels.

[0067] In one embodiment, the specific steps of modulating communication information on the vortex electromagnetic wave of the first mode and transmitting multiple communication information at the same frequency are:

[0068] The phase excitation of the first mode is multiplied by the communication information, and a communication vortex electromagnetic wave is obtained after modulation;

[0069] The communication vortex electromagnetic wave is transmitted through the channel to the receiving end, where it is demodulated to obtain the communication information.

[0070] Furthermore, the phase excitation with a higher modal value is multiplied by the communication information, and the communication vortex electromagnetic wave is obtained after modulation. Since the vortex electromagnetic wave beam with a higher modal value has a lower divergence and a lower propagation energy loss, it is more suitable for communication transmission. Therefore, the modulated communication vortex electromagnetic wave is transmitted as a communication information bearing channel.

[0071] The modulated communication vortex electromagnetic wave is transmitted through the channel to the receiving end. The phase shift network at the receiving end generates a conjugate phase matrix with the transmitting array feed excitation, and multiplies it with the received signal for modal demodulation to obtain the original communication information.

[0072] Furthermore, the communication information at the transmitting end passes through the phase shift network and is multiplied by the phase excitation matrix to realize OAM mode l1 modulation, generate an OAM modulated transmission signal, and transmit through the channel to the receiving end;

[0073] The phase shift network at the receiving end generates a phase matrix that is conjugate with the transmitting array feed excitation And multiply it with the received signal to perform OAM mode demodulation to obtain the vortex electromagnetic wave carrying the communication information;

[0074] In one embodiment, the specific steps of performing target detection and perception imaging on the vortex electromagnetic wave of the second mode and acquiring perception information are as follows:

[0075] The phase excitation of the second mode is multiplied by the sensing information, and the sensing vortex electromagnetic wave is obtained after modulation;

[0076] receiving the reflected differential radiation field echo and sampling the differential radiation field echo;

[0077] According to the two-dimensional distribution of the sampled data in the spectrum-modal dimension, the distance and azimuth position information of the perceived target is obtained.

[0078] Furthermore, the phase excitation with a lower modal value is multiplied by the perception information, and the perception vortex electromagnetic wave is obtained after modulation. Since the vortex electromagnetic wave beam with a lower modal value has a higher divergence and is more suitable for target recognition, the modulated perception vortex electromagnetic wave is transmitted as a perception information carrying channel.

[0079] Different from the communication link that performs information demodulation at the receiving end, the perception loop performs modal demodulation on the target's reflected echo at the transmitting end. The perception vortex electromagnetic wave is transmitted through the channel to the target. The irregularity of the perception target reflects the vortex electromagnetic wave to form a differential radiation field echo. The echo of the perception vortex electromagnetic wave is sampled, and the distance and azimuth position information of the perception target is obtained based on the two-dimensional distribution of the sampled data in the spectrum-modal dimension.

[0080] Furthermore, the sensing information at the transmitting end passes through the phase shift network, is multiplied by the phase excitation matrix, and undergoes OAM modal modulation to obtain a vortex electromagnetic wave with a modal value of l2 for target sensing, which is transmitted through the channel to the receiving end;

[0081] The vortex electromagnetic wave is sensed to be transmitted through the channel to the target, and the irregularity of the target is sensed to reflect the vortex electromagnetic wave to form a differential radiation field echo;

[0082] The echo of the perceived vortex electromagnetic wave is sampled, and the distance and azimuth position information of the perceived target is obtained based on the two-dimensional distribution of the sampled data in the spectrum-modal dimension.

[0083] In one embodiment, during the modulation process, the communication information and the perception information may be jointly modulated.

[0084] Furthermore, vortex electromagnetic wave modulation and demodulation of the transmitted signal is equivalent to performing an inverse discrete Fourier transform operation on the signal, which can reduce the difficulty of signal processing, and can be combined with other multiplexing technologies such as time division multiplexing, frequency division multiplexing and orthogonal frequency division multiplexing to jointly modulate the transmitted information, thereby jointly improving spectrum utilization in dimensions such as time, frequency and mode.

[0085] In one embodiment, the joint modulation method is joint multiplexing of two or more multiplexing modes.

[0086] Furthermore, the multiplexing method of the communication information and the perception information of the transmitting end includes mode division multiplexing and the combined multiplexing of mode division multiplexing with traditional multiplexing methods such as time division multiplexing, frequency division multiplexing and orthogonal frequency division multiplexing. Mode division multiplexing uses different modal values ​​to modulate information, modulates communication information and perception information onto vortex electromagnetic waves of different modes for transmission, and realizes the multiplexing of vortex electromagnetic wave modal dimensions; time division multiplexing distributes the communication information and perception information of the transmitter on different time slots according to a certain rule, and then performs phase excitation on the information on different time slots and modulates them onto vortex electromagnetic waves of different modes for transmission, realizing the joint multiplexing of time and vortex electromagnetic wave modal dimensions; frequency division multiplexing distributes the communication information and perception information of the transmitter on different frequencies, and then performs phase excitation and modulation on the information on different frequencies to vortex electromagnetic waves of different modes for transmission, realizing the joint multiplexing of frequency and vortex electromagnetic wave modal dimensions; orthogonal frequency division multiplexing distributes communication information and perception information on different time-frequency resources, and then adds different modal phase excitation modulation to the vortex electromagnetic wave channel for transmission, realizing the joint multiplexing of time, frequency and vortex electromagnetic wave modal dimensions.

[0087] Perception information includes pulse wave signals and continuous wave signals; in a modal multiplexing system, in order to achieve consistency with the communication information modulation, the continuous wave signal can be used to modulate the perception information; in a time division and mode division multiplexing system, the continuous wave signal and the pulse signal can be distributed in different time slots, and modally modulated as communication information and perception information respectively; in a frequency division multiplexing system, continuous waves and pulse waves of different frequencies can be used as communication information and perception information respectively, and modally modulated; in an orthogonal frequency division-mode division multiplexing system, pulse signals can be arranged on fixed time-frequency resource units for perceptual information modulation.

[0088] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0089] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multi-modal vortex electromagnetic wave synaesthesia fusion system, characterized in that: include: An antenna array building module, used to evenly distribute multiple antenna array units on a circumference to form a uniform circular antenna array; A phase excitation calculation module, used for calculating the phase excitation required to generate vortex electromagnetic waves of each mode according to the relationship between the modal value and the number of antenna array units; A composite vortex electromagnetic wave generating module, used for superimposing the phase excitations of different modes on each of the antenna array units of the uniform circular antenna array to generate composite vortex electromagnetic waves carrying orbital angular momentum of different modes; A synaesthesia fusion module, used for performing communication information modulation and perception information modulation on the composite modal vortex electromagnetic wave, respectively, to obtain a communication vortex electromagnetic wave and a perception vortex electromagnetic wave; A transmitting module, used for transmitting the communication vortex electromagnetic wave and the perception vortex electromagnetic wave, and demodulating the perception vortex electromagnetic wave to obtain the distance and azimuth position information of the perception target; The receiving module is used to demodulate the communication vortex electromagnetic wave to obtain communication information, and reflect the perception vortex electromagnetic wave to form a differential radiation field echo.

2. An application method of the multi-modal vortex electromagnetic wave synaesthesia fusion system according to claim 1, characterized in that: The specific steps are: Acquiring the vortex electromagnetic waves of multiple modes based on the synaesthesia fusion system of multi-modal vortex electromagnetic waves; Modulating communication information on the vortex electromagnetic wave of the first mode, and transmitting multiple communication information at the same frequency; Target detection and perception imaging are performed on the vortex electromagnetic wave in the second mode, and perception information is obtained simultaneously.

3. The application method of the synaesthesia fusion system based on multimodal vortex electromagnetic waves according to claim 2 is characterized in that: The steps for obtaining the vortex electromagnetic waves of multiple modes are as follows: Evenly distributing a plurality of the antenna array units on a circumference to form the uniform circular antenna array; Based on the relationship between the modal value and the number of antenna array elements, the phase excitation required to generate the vortex electromagnetic wave of each mode is calculated; The phase excitations of different modes are superimposed on each of the antenna array units of the uniform circular antenna array to generate composite vortex electromagnetic waves carrying orbital angular momentum of different modes.

4. According to the application method of the synaesthesia fusion system based on multi-modal vortex electromagnetic waves according to claim 3, the calculation steps for generating the phase excitation required for the vortex electromagnetic waves of any mode are: Exciting each antenna array unit of the uniform circular antenna array, and setting a continuously changing phase excitation delay between adjacent antenna array units; The phase excitation required for each antenna array unit of the uniform circular antenna array to generate a vortex electromagnetic wave of any mode is calculated according to the phase excitation delay.

5. According to the application method of the synaesthesia fusion system based on multi-modal vortex electromagnetic waves of claim 2, the specific steps of modulating the communication information on the vortex electromagnetic waves of the first mode and transmitting multiple channels of the communication information at the same frequency are: Multiplying the phase excitation of the first mode by the communication information to obtain the communication vortex electromagnetic wave after modulation; The communication vortex electromagnetic wave is transmitted through the channel to reach the receiving end, and is demodulated to obtain the communication information.

6. According to the application method of the synaesthesia fusion system based on multimodal vortex electromagnetic waves of claim 2, the specific steps of performing target detection and perception imaging on the vortex electromagnetic waves of the second mode and acquiring the perception information at the same time are: Multiplying the phase excitation of the second mode by the perception information to obtain the perception vortex electromagnetic wave after modulation; receiving the reflected differential radiation field echo and sampling the differential radiation field echo; According to the two-dimensional distribution of the sampled data in the spectrum-modal dimension, the distance and azimuth position information of the perceived target is obtained.

7. The application method of the synaesthesia fusion system based on multi-modal vortex electromagnetic waves according to claim 2 is characterized in that: During the modulation process, the communication information and the perception information may be jointly modulated.

8. The application method of the synaesthesia fusion system based on multi-modal vortex electromagnetic waves according to claim 7 is characterized in that: The joint modulation method is the joint multiplexing of two or more multiplexing modes.

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