Wireless Optical Communication and Sensing Integrated Signal Design and Generation Method and Device

Abstract

The present application discloses a method and apparatus for communication and sensing integrated signal design and generation for wireless optical communication. The method includes: determining system parameters according to communication requirements and sensing requirements respectively; generating sensing signals applicable to wireless optical communication; modulating communication bits into orbital angular momentum symbols, and loading the sensing signals onto single or multiple orbital angular momentum beams corresponding to the orbital angular momentum symbols; if a single orbital angular momentum beam is used for communication, the beam loaded with the orbital angular momentum symbol is a communication and sensing integrated signal based on orbital angular momentum for free space optical communication, and if multiple orbital angular momentum beams are used for communication, different orbital angular momentum beams are combined into a single beam to obtain a communication and sensing integrated signal based on orbital angular momentum for free space optical communication. Thereby, problems such as mutual interference and mutual restriction between communication and sensing in the optical frequency band are solved, the system security and reliability are improved, and the needs of different users are met.

Description

Technical Field

[0001] The present application relates to the field of communication and laser radar technology, and in particular to a method and device for designing and generating integrated communication and perception signals for wireless light. Background Art

[0002] With the development of information technology, electronic devices need to perform multiple tasks such as communication, detection, and identification. Using independent communication and perception devices will lead to problems such as excessive size, waste of resources, and spectrum interference. The integrated communication and perception technology achieves unified design of communication and perception functions through signal joint design and hardware sharing, thereby improving the overall performance and business capabilities of the system, and has received widespread attention from academia and industry.

[0003] Furthermore, research on the integration of communication and perception is concentrated on wireless frequency bands such as millimeter waves, which have the following problems: on the one hand, the spectrum resources of wireless frequency bands are gradually exhausted, which limits the communication rate; on the other hand, the wireless frequency bands have strong penetration, making it difficult to suppress mutual interference between users, reducing the security of communication and perception, and having low practicality.

[0004] In related technologies, compared with wireless frequency bands, optical frequency bands have larger, unregulated bandwidth, which can achieve ultra-high-speed communication and ultra-high-precision perception. The light has good collimation and weak penetration, which limits the space and path of its propagation and is not prone to multi-user interference.

[0005] However, in the related technologies, integrated communication and perception in the optical frequency band interfere with and restrict each other, and the system compatibility is low, which reduces the system security and reliability while reducing the system applicability and cannot meet the needs of users, which needs to be solved urgently. Summary of the invention

[0006] The present application provides a method and device for designing and generating a communication-perception integrated signal for wireless light, in order to solve the problems in the related technology that the communication-perception integrated communication and perception in the optical frequency band interfere with and restrict each other, the system has low compatibility, reduces the system security and reliability, reduces the system applicability, and cannot meet the needs of users.

[0007] An embodiment of the first aspect of the present application provides a method for designing and generating a communication and sensing integrated signal for wireless optical communication, including the following steps: determining system parameters according to communication requirements and sensing requirements respectively; generating a sensing signal for wireless optical communication based on the system parameters; modulating communication bits into orbital angular momentum symbols, and loading the sensing signal onto a single or multiple orbital angular momentum beams corresponding to the orbital angular momentum symbols; if a single orbital angular momentum beam is used for communication, the beam loaded with the orbital angular momentum symbol is used as a communication and sensing integrated signal for free-space optical communication based on orbital angular momentum, and if multiple orbital angular momentum beams are used for communication, different orbital angular momentum beams are combined into a single beam to obtain the communication and sensing integrated signal for free-space optical communication based on orbital angular momentum.

[0008] Optionally, in an embodiment of the present application, the determining system parameters according to communication requirements and sensing requirements respectively includes: determining the period and guard interval of the sensing signal according to the sensing refresh rate and the maximum unambiguous distance; determining the bandwidth of the sensing signal according to the distance resolution requirement.

[0009] Optionally, in an embodiment of the present application, the determining system parameters according to communication requirements and sensing requirements respectively includes: selecting a single or multiple orbital angular momenta from the available orbital angular momenta to generate an orbital angular momentum symbol table for communication, so as to determine the number of bits transmitted by a single orbital angular momentum symbol; determining the orbital angular momentum symbol period and the number of orbital angular momentum symbols within a single sensing signal period according to the communication rate requirement and the number of bits.

[0010] Optionally, in an embodiment of the present application, the modulating the communication bits into the orbital angular momentum symbols may be on-off keying of orbital angular momentum, pulse amplitude modulation, or keying or multiplexing of multiple orbital angular momenta.

[0011] Optionally, in an embodiment of the present application, the sensing signal for wireless optical communication includes a simple pulse signal, a spread-spectrum pulse signal, an amplitude-modulated continuous signal, and a frequency-modulated continuous signal.

[0012] Optionally, in an embodiment of the present application, the modulating the communication bits into orbital angular momentum symbols includes: performing channel coding on the communication bits and grouping them according to the number of bits to obtain the encoded communication bits; modulating the encoded communication bits into the orbital angular momentum symbols according to the orbital angular momentum symbol table.

[0013] Optionally, in an embodiment of the present application, the loading of the sensing signal onto a single or multiple orbital angular momentum beams corresponding to the orbital angular momentum symbol includes: when communicating using a single-path orbital angular momentum beam, loading the sensing signal onto the beam so that the beam has the orbital angular momentum corresponding to the orbital angular momentum symbol; when communicating using multiple-path orbital angular momentum beams, normalizing the sensing signal according to the orbital angular momentum symbol to obtain a normalized sensing signal, and respectively loading the normalized sensing signal onto multiple beams corresponding to the orbital angular momentum symbol to be converted into the orbital angular momentum beam.

[0014] Optionally, in an embodiment of the present application, the sensing signal available for wireless optical communication can also continue to carry communication information through on-off keying, pulse amplitude modulation, pulse position modulation, or orthogonal frequency division multiplexing.

[0015] An embodiment of the second aspect of the present application provides a communication and sensing integrated signal design and generation device for wireless optical communication, including: a determination module for respectively determining system parameters according to communication requirements and sensing requirements; a generation module for generating a sensing signal available for wireless optical communication based on the system parameters; a modulation module for modulating communication bits into orbital angular momentum symbols and loading the sensing signal onto a single or multiple orbital angular momentum beams corresponding to the orbital angular momentum symbol; a synthesis module for, when communicating using the single orbital angular momentum beam, loading the beam with the orbital angular momentum symbol as a communication and sensing integrated signal for free space optical communication based on orbital angular momentum, and when communicating using the multiple orbital angular momentum beams, synthesizing different orbital angular momentum beams into a single beam to obtain the communication and sensing integrated signal for free space optical communication based on orbital angular momentum.

[0016] Optionally, in an embodiment of the present application, the determination module includes: a first sensing determination unit for determining the period and guard interval of the sensing signal according to the sensing refresh rate and the maximum unambiguous distance; a second sensing determination unit for determining the bandwidth of the sensing signal according to the distance resolution requirement.

[0017] Optionally, in an embodiment of the present application, the determination module includes: a first communication determination unit for selecting a single or multiple orbital angular momenta from the available orbital angular momenta to generate an orbital angular momentum symbol table for communication to determine the number of bits transmitted by a single orbital angular momentum symbol; a second communication determination unit for determining the orbital angular momentum symbol period and the number of orbital angular momentum symbols within a single sensing signal period according to the communication rate requirement and the number of bits.

[0018] Optionally, in an embodiment of the present application, the modulation of communication bits into the orbital angular momentum symbols may be on-off keying, pulse amplitude modulation of the orbital angular momentum, or keying or multiplexing of multiple orbital angular momenta.

[0019] Optionally, in an embodiment of the present application, the sensing signals applicable to wireless optical communication include simple pulse signals, spread-spectrum pulse signals, amplitude-modulated continuous signals, and frequency-modulated continuous signals.

[0020] Optionally, in an embodiment of the present application, the modulation module includes: a first processing unit configured to perform channel coding on the communication bits and group them according to the number of bits to obtain encoded communication bits; a modulation unit configured to modulate the encoded communication bits into the orbital angular momentum symbols according to the orbital angular momentum symbol table.

[0021] Optionally, in an embodiment of the present application, the modulation module includes: a second processing unit configured to, when using a single-channel orbital angular momentum beam for communication, load the sensing signal onto the beam so that the beam has the orbital angular momentum corresponding to the orbital angular momentum symbol; a third processing unit configured to, when using multiple-channel orbital angular momentum beams for communication, perform normalization processing on the sensing signal according to the orbital angular momentum symbol to obtain a normalized sensing signal, and load the normalized sensing signal onto multiple beams corresponding to the orbital angular momentum symbols respectively to convert them into the orbital angular momentum beams.

[0022] Optionally, in an embodiment of the present application, the sensing signals applicable to wireless optical communication may further carry communication information through on-off keying, pulse amplitude modulation, pulse position modulation, or orthogonal frequency division multiplexing.

[0023] An embodiment of the third aspect of the present application provides an electronic device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor executes the program to implement the method for designing and generating communication and sensing integrated signals for wireless optical communication as described in the above embodiments.

[0024] An embodiment of the fourth aspect of the present application provides a computer-readable storage medium storing a computer program, which when executed by a processor implements the method for designing and generating communication and sensing integrated signals for wireless optical communication as described above.

[0025] Embodiments of the present application can determine system parameters according to communication requirements and sensing requirements respectively, generate sensing signals that can be used for wireless optical communication, modulate communication bits into orbital angular momentum symbols, and load the sensing signals onto single or multiple orbital angular momentum beams corresponding to the orbital angular momentum symbols. Thus, when using a single orbital angular momentum beam for communication, the beam loaded with the orbital angular momentum symbol is an integrated communication and sensing signal based on orbital angular momentum for free-space optical communication. When using multiple orbital angular momentum beams for communication, different orbital angular momentum beams are combined into a single beam to obtain an integrated communication and sensing signal based on orbital angular momentum for free-space optical communication. Furthermore, while improving the compatibility of the system and enhancing the flexibility of system design, the security and applicability of the system can be improved. Thereby, the problems that in the optical frequency band, communication and sensing in integrated communication interfere with and restrict each other, the compatibility of the system is relatively low, the security and reliability of the system are reduced, the applicability of the system is reduced, and the user requirements cannot be met are solved.

[0026] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description of the embodiments in conjunction with the drawings, in which:

[0028] Figure 1 FIG. is a flowchart of a method for designing and generating an integrated communication and sensing signal for wireless optical communication according to an embodiment of the present application;

[0029] Figure 2 FIG. is a flowchart of parameter design of an integrated communication and sensing signal for wireless optical communication in a specific embodiment of the present application;

[0030] Figure 3 FIG. is a flowchart of generating an integrated communication and sensing signal for wireless optical communication in a specific embodiment of the present application;

[0031] Figure 4 FIG. is a schematic structural diagram of using a simple pulse as a sensing signal in a specific embodiment of the present application;

[0032] Figure 5 FIG. is a schematic structural diagram of using a simple pulse as a sensing signal and loading communication information in a specific embodiment of the present application;

[0033] Figure 6 FIG. is a schematic structural diagram of using an FMCW (Frequency Modulated Continuous Wave) signal as a sensing signal in a specific embodiment of the present application;

[0034] Figure 7 Schematic diagram of a specific embodiment of the present application using an FMCW signal as a sensing signal and loading communication information;

[0035] Figure 8 Schematic diagram of a specific embodiment of the present application using a spread-spectrum pulse as a sensing signal;

[0036] Figure 9 Schematic diagram of a specific embodiment of the present application using a spread-spectrum pulse as a sensing signal and loading communication information;

[0037] Figure 10 Schematic diagram of a specific embodiment of the present application using a pulse with a spread-spectrum sequence and pulse position modulation as a sensing signal;

[0038] Figure 11 Schematic diagram of a specific embodiment of the present application using a pulse with a spread-spectrum sequence and pulse position modulation as a sensing signal and loading communication information;

[0039] Figure 12 Schematic diagram of a communication and sensing integrated signal design and generation device for wireless optical according to an embodiment of the present application;

[0040] Figure 13 Schematic diagram of an electronic device according to an embodiment of the present application. Detailed implementation manners

[0041] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present application and should not be construed as limiting the present application.

[0042] The following describes a method and apparatus for designing and generating communication and sensing integrated signals for wireless optical communication according to embodiments of the present application. In view of the problems in the above-mentioned background technology that the communication and sensing in the optical frequency band interfere with and restrict each other, the compatibility of the system is relatively low, which reduces the security and reliability of the system while reducing the applicability of the system and cannot meet the needs of users, the present application provides a method for designing and generating communication and sensing integrated signals for wireless optical communication. In this method, system parameters can be determined according to communication requirements and sensing requirements, and a sensing signal that can be used for wireless optical communication can be generated. Communication bits can be modulated into orbital angular momentum symbols, and the sensing signal can be loaded onto a single or multiple orbital angular momentum beams corresponding to the orbital angular momentum symbols. Thus, when a single orbital angular momentum beam is used for communication, the beam loaded with the orbital angular momentum symbol is a communication and sensing integrated signal based on orbital angular momentum for free space optical communication. When multiple orbital angular momentum beams are used for communication, different orbital angular momentum beams are combined into a single beam to obtain a communication and sensing integrated signal based on orbital angular momentum for free space optical communication. Furthermore, the compatibility of the system can be improved, the flexibility of system design can be enhanced, and the security and applicability of the system can be improved. Thereby, the problems that the communication and sensing in the optical frequency band interfere with and restrict each other, the compatibility of the system is relatively low, which reduces the security and reliability of the system while reducing the applicability of the system and cannot meet the needs of users are solved.

[0043] Specifically, Figure 1 FIG. is a schematic flowchart of a method for designing and generating communication and sensing integrated signals for wireless optical communication provided by an embodiment of the present application.

[0044] As Figure 1 shown, the method for designing and generating communication and sensing integrated signals for wireless optical communication includes the following steps:

[0045] In step S101, system parameters are determined according to communication requirements and sensing requirements respectively.

[0046] It can be understood that in the embodiments of the present application, system parameters can be determined according to communication requirements and sensing requirements in the following steps to ensure that the system parameters can conform to the characteristics of optical sensing, thereby improving the executability and flexibility of system design.

[0047] Among them, in an embodiment of the present application, determining system parameters according to communication requirements and sensing requirements respectively includes: determining the period and guard interval of the sensing signal according to the sensing refresh rate and the maximum unambiguous distance; determining the bandwidth of the sensing signal according to the distance resolution requirement.

[0048] In the actual implementation process, an amplitude modulation / direct detection scheme is often adopted in the optical frequency band. Time-of-flight ranging can effectively match the characteristics of the optical frequency band. When the amplitude modulation / direct detection scheme is often adopted in the application of the optical frequency band, the Doppler frequency shift of low-speed moving targets is usually ignored, and the target moving speed is calculated through multiple distance measurements. Therefore, distance measurement is the focus of optical frequency band sensing, and the system parameters are determined according to the sensing refresh rate, maximum unambiguous distance, and distance resolution index to conform to the characteristics of optical sensing.

[0049] Among them, when the sensing signal is a pulse signal, the pulse duration is determined according to the distance resolution, that is, the bandwidth of the sensing signal determines the pulse duration, and the period can be determined according to the sensing refresh rate, and the guard interval can be determined according to the maximum unambiguous distance. When the sensing signal is a frequency-modulated continuous wave signal, the frequency sweep bandwidth is determined according to the distance resolution, that is, the bandwidth of the sensing signal determines the frequency sweep bandwidth. Among them, a DC bias needs to be added to the frequency-modulated continuous wave signal to become a non-negative real signal.

[0050] Optionally, in an embodiment of the present application, the system parameters are determined according to communication requirements and sensing requirements respectively, including: among the available orbital angular momenta, single or multiple orbital angular momenta are selected to generate an orbital angular momentum symbol table for communication to determine the number of bits transmitted by a single orbital angular momentum symbol; the orbital angular momentum symbol period and the number of orbital angular momentum symbols within a single sensing signal period are determined according to the communication rate requirement and the number of bits.

[0051] As a possible implementation manner, the embodiment of the present application can select single or multiple orbital angular momenta among the available orbital angular momenta to generate an orbital angular momentum symbol table for communication. In other words, each orbital angular momentum symbol table can include one or more orbital angular momenta, and the orbital angular momentum symbol set for communication can be a subset of the power set of all available orbital angular momentum modes. Among them, the diversity of the subset makes the orbital angular momentum communication scheme have diversity, so that multiple different communication rates can be achieved, and at the same time, the bit error rate can be reduced through a specific symbol set design.

[0052] Furthermore, the embodiment of the present application can select a subset from the power set of the available orbital angular momentum mode set as the orbital angular momentum symbol table for communication, and then determine the number of bits transmitted by a single orbital angular momentum symbol, and determine the orbital angular momentum symbol period and the number of orbital angular momentum symbols within a single sensing signal period according to the communication rate requirement and the number of bits transmitted by a single orbital angular momentum symbol.

[0053] In step S102, a sensing signal available for wireless light is generated based on the system parameters.

[0054] It can be understood that the embodiments of the present application can generate the sensing signals for wireless light in the following steps based on the sensing system parameters, thereby effectively improving the flexibility of system design.

[0055] Among them, in an embodiment of the present application, the sensing signals for wireless light include simple pulse signals, spread-spectrum pulse signals, amplitude-modulated continuous signals, and frequency-modulated continuous signals.

[0056] In the actual implementation process, the sensing signals for wireless light include but are not limited to simple pulse signals, spread-spectrum pulse signals, amplitude-modulated continuous signals, and frequency-modulated continuous signals, etc., thereby effectively improving the flexibility of system design.

[0057] Among them, the spread-spectrum pulse signal can use the spread-spectrum sequence to identify different users and enhance the anti-interference ability. Among them, the spread-spectrum sequence can be an m-sequence, a Gold sequence, or a Chu sequence.

[0058] In addition, the sensing signals for wireless light can also continue to carry communication information through on-off keying, pulse amplitude modulation, pulse position modulation, or orthogonal frequency division multiplexing.

[0059] In step S103, the communication bits are modulated into orbital angular momentum symbols, and the sensing signals are loaded onto single or multiple orbital angular momentum beams corresponding to the orbital angular momentum symbols.

[0060] It can be understood that the embodiments of the present application can modulate the communication bits in the following steps into orbital angular momentum symbols, and load the sensing signals in the following steps onto single or multiple orbital angular momentum beams corresponding to the orbital angular momentum symbols, so as to improve the compatibility of the system while improving the overall performance of the system.

[0061] Among them, the embodiments of the present application can turn on or off the corresponding channels according to the orbital angular momentum symbols, so that the sensing signals can drive specific electro-optical converters.

[0062] Optionally, in an embodiment of the present application, modulating the communication bits into orbital angular momentum symbols can be on-off keying of orbital angular momentum, pulse amplitude modulation, or keying or multiplexing of multiple orbital angular momenta.

[0063] In some embodiments, the embodiments of the present application can perform on-off keying or pulse amplitude modulation of orbital angular momentum, or keying or multiplexing of multiple orbital angular momenta, and load the sensing signals in the following steps onto single or multiple orbital angular momentum beams corresponding to the orbital angular momentum symbols, so as to improve the overall performance of the system.

[0064] Among them, in an embodiment of the present application, modulating communication bits into orbital angular momentum symbols includes: performing channel coding on the communication bits and grouping them according to the number of bits to obtain the encoded communication bits; modulating the encoded communication bits into orbital angular momentum symbols according to the orbital angular momentum symbol table.

[0065] In some embodiments, the embodiments of the present application can perform channel coding on communication bits, group the encoded communication bits according to the number of bits transmitted by a single orbital angular momentum symbol to obtain the encoded communication bits, and modulate the encoded communication bits into orbital angular momentum symbols according to the orbital angular momentum symbol table, thereby improving the flexibility and feasibility of system design.

[0066] Optionally, in an embodiment of the present application, loading a sensing signal onto an orbital angular momentum beam corresponding to an orbital angular momentum symbol includes: when using a single-path orbital angular momentum beam for communication, loading the sensing signal onto the beam so that the beam has the orbital angular momentum corresponding to the orbital angular momentum symbol; when using multiple-path orbital angular momentum beams for communication, performing normalization processing on the sensing signal according to the orbital angular momentum symbol to obtain a normalized sensing signal, and respectively loading the normalized sensing signal onto multiple beams corresponding to the orbital angular momentum symbols to be converted into orbital angular momentum beams.

[0067] During the actual execution process, when the embodiments of the present application use a single-path orbital angular momentum beam for communication, the sensing signal can be loaded onto the orbital angular momentum beam corresponding to the orbital angular momentum symbol so that the beam has the orbital angular momentum corresponding to the orbital angular momentum symbol. When the embodiments of the present application use orbital angular momentum symbols including multiple paths of orbital angular momentum, the sensing signal is normalized according to the orbital angular momentum symbol, the normalized sensing signal is loaded onto multiple beams, and converted into the corresponding orbital angular momentum beams, thereby enhancing the flexibility of system design, improving the compatibility of the system, and at the same time improving the overall performance of the system.

[0068] In step S104, if a single orbital angular momentum beam is used for communication, the beam loaded with the orbital angular momentum symbol is used as a communication and sensing integrated signal based on orbital angular momentum for free space light. If multiple orbital angular momentum beams are used for communication, different orbital angular momentum beams are combined into a single beam to obtain a communication and sensing integrated signal based on orbital angular momentum for free space light.

[0069] It can be understood that in the embodiments of the present application, when communicating using a single orbital angular momentum beam, the beam loaded with orbital angular momentum symbols is used as a communication and sensing integrated signal for free-space optical communication based on orbital angular momentum. When communicating using multiple orbital angular momentum beams, different orbital angular momentum beams are combined into a single beam, that is, beams with different orbital angular momenta are combined into a single beam through an orbital angular momentum multiplexing system, namely a coaxial propagating beam, so as to obtain a communication and sensing integrated signal for free-space optical communication based on orbital angular momentum, facilitating system transmission. Furthermore, the embodiments of the present application utilize the characteristic that there are multiple orthogonal components in the orbital angular momentum of optical signals, effectively solving the problems of mutual interference and mutual restriction between communication and sensing in the design of communication and sensing integrated signals, enhancing the flexibility of system design, improving the overall performance of the system, and effectively meeting user requirements.

[0070] As Figure 2 shown below, a specific embodiment is used to elaborate in detail the specific working principle of the embodiments of the present application.

[0071] Step S201: Determine the sensing signal bandwidth B according to the range resolution requirement ΔD s 。

[0072] Specifically, the range resolution of time-of-flight ranging is inversely proportional to the bandwidth. To ensure the range resolution, the swept bandwidth needs to meet the following conditions, that is:

[0073]

[0074] where c0 is the speed of light in the environment.

[0075] When using a pulse signal for sensing, the pulse width needs to meet the following conditions, that is:

[0076]

[0077] When using a frequency-modulated continuous-wave signal for sensing, the swept bandwidth is B s 。

[0078] Step S202: Determine the sensing signal guard interval T max and period T g according to the maximum unambiguous distance D s 。

[0079] Specifically, when the time-of-flight of the sensing signal is greater than its own period, the system cannot identify the transmission time corresponding to the reflected signal, and the target distance exceeds the maximum unambiguous distance.

[0080] When using a simple pulse signal for sensing, it is necessary to first determine the sensing signal period according to the sensing refresh rate f, that is:

[0081]

[0082] Among them, T s is the sensing signal period.

[0083] Then, determine the sensing signal guard interval according to the maximum unambiguous distance, that is:

[0084]

[0085] Among them, T g is the guard interval.

[0086] When using a frequency-modulated continuous wave signal or a time-hopping pulse signal for sensing, in order to meet the requirement of the maximum unambiguous distance, the sensing signal period needs to meet the following conditions, that is:

[0087]

[0088] Step S203: Determine the number of bits carried by a single sensing signal period T s carried according to the communication rate requirement C.

[0089] Specifically, the number of bits carried by a single sensing period is:

[0090] L0 = CT s

[0091] Among them, L0 is the number of bits carried by a single sensing period, C is the communication rate requirement, and T s is the sensing signal period.

[0092] Step S204: Determine the orbital angular momentum symbol table for communication according to the available orbital angular momentum modes, and then determine the number of bits transmitted by a single orbital angular momentum symbol.

[0093] Specifically, each available orbital angular momentum mode can be represented by its angular quantum number l. Suppose there are l N available orbital angular momentum modes, then the set of available orbital angular momentum modes is A L = {l1, l2,..., l N}, considering the amplitudes of each orbital angular momentum mode, the set of available amplitudes is B L = {0, 1,...}. When generating the orbital angular momentum symbol table, first construct the Cartesian product of the set of orbital angular momentum modes and the set of amplitudes, that is:

[0094] S L = A L ×B L

[0095] Among them, A L is the set of available orbital angular momentum modes, BL is the available amplitude set.

[0096] In S L power set select a non - empty subset S C as the orbital angular momentum symbol table for communication. When card(S C ) = N≥2, the number of bits transmitted by a single orbital angular momentum symbol is:

[0097] L1 = [log2N]

[0098] When each element in S C is a set composed of only a single orbital angular momentum mode, the system uses a single - path orbital angular momentum beam for communication. When S C contains a set composed of multiple orbital angular momentum modes, the system uses a multi - path orbital angular momentum beam for communication.

[0099] Step S205: Determine the number of orbital angular momentum symbols N s contained in a single sensing period and the duration T c of a single orbital angular momentum symbol c .

[0100] Specifically, the number of orbital angular momentum symbols contained in a single sensing period is:

[0101]

[0102] When using a simple pulse signal for sensing, the duration of a single orbital angular momentum symbol is:

[0103]

[0104] When using a frequency - modulated continuous - wave signal or a time - hopping pulse signal for sensing, the duration of a single orbital angular momentum symbol is:

[0105]

[0106] As Figure 3 shown, the following uses another specific embodiment to elaborate in detail the specific working principle of the embodiment of the present application.

[0107] Step S301: Communication bit encoding and modulation.

[0108] Specifically, the rate of the input communication bits is C0, and channel encoding is performed at the coding rate R to obtain the communication rate required by the system, that is:

[0109] C = C0 / R

[0110] Among them, any coding such as block codes and convolutional codes that meet the coding rate requirements can be used for channel coding.

[0111] The encoded communication bits are grouped into groups of L1 bits and mapped to orbital angular momentum symbols. Since each orbital angular momentum symbol corresponds one-to-one with the on / off situation of a group of orbital angular momentum channels, therefore, an l N -dimensional vector x[k] can be used to represent the k-th orbital angular momentum symbol, that is:

[0112] x[k] = (x[k, 0], x[k, 1], …, x[k, l N -1]) T , where x[k, i] ∈ B L

[0113] Among them, x[k, i] = 0 means that the i-th orbital angular momentum mode is not emitted, and x[k, i] > 0 means that the i-th orbital angular momentum mode is emitted and the relative amplitude is x[k, i].

[0114] Step S302: Sensing signal generation.

[0115] Specifically, a sensing signal s(t) can be generated according to the given type and parameters of the sensing signal, or a sensing signal s(t) carrying a communication signal can be generated.

[0116] Step S303: Electro-optical conversion and orbital angular momentum mode conversion.

[0117] That is to say, when the embodiments of the present application use multiple orbital angular momentum beams for communication, in order to ensure the constant power of the transmitted electrical signal, normalization processing can be performed according to the number of channels opened by the orbital angular momentum symbols.

[0118] Specifically, when transmitting the orbital angular momentum symbol x[k], the normalized sensing signal loaded on the path where the i-th available orbital angular momentum mode is located is:

[0119]

[0120] The normalized sensing signal is loaded onto the Gaussian beam. Using the cylindrical coordinate system, with the beam propagation direction as the axis, the spatial distribution of the Gaussian beam is:

[0121] U g (r, θ, z) = A(r, z)

[0122] Among them, is the intensity distribution of the Gaussian beam, which is independent of the azimuth angle.

[0123] Let the angular quantum number of the i-th available orbital angular momentum mode be li , the spatial distribution of the beam corresponding to the orbital angular momentum is as follows:

[0124] U o (r, θ, z) = A(r, z) exp(il i θ)

[0125] The spatio-temporal expression of the beam of the i-th path loaded with the integrated communication and sensing signal is:

[0126]

[0127] where ω is the optical frequency, k is the wave number, and the beam propagation direction is set as the +z direction.

[0128] Step S304: Orbital angular momentum beam multiplexing.

[0129] Specifically, in an embodiment of the present application, the multiplexing module can synthesize multiple orbital angular momentum beams into a coaxial propagating orbital angular momentum beam, and denote the operation of the multiplexing process as The spatio-temporal expression of the finally transmitted beam of the integrated communication and sensing signal based on orbital angular momentum for space optical communication is:

[0130]

[0131] Next, in combination with Figure 4 and Figure 5 , another specific embodiment of the present application will be elaborated in detail.

[0132] As Figure 4 and Figure 5 shown, in an embodiment of the present application, a simple pulse signal can be used for sensing, and a single OAM (Orbital Angular Momentum) uses OOK (On Off Keying) to generate OAM symbols for communication.

[0133] Among them, the pulse signal h(t) can be a rectangular pulse, a Gaussian pulse, or a raised cosine pulse. If a rectangular pulse is selected, the pulse signal can be expressed as:

[0134]

[0135] where rect(·) is the rectangular window function.

[0136] Furthermore, Figure 4 is the structural schematic diagram of the simple pulse as the sensing signal. Each sensing signal period T s consists of a time period for transmitting N c OAM symbols and a guard interval T gComposed of each OAM symbol duration T c Send a single pulse with a duration of τ for sensing within it, and the generated sensing signal is:

[0137]

[0138] Since single-channel OAM and OOK are adopted, the OAM symbols to be sent satisfy that there is only one non-zero element in x[k], and this element is 1.

[0139] Furthermore, the embodiments of the present application can adopt Figure 5 The structure shown in Figure converts the sensing signal s(t) onto an electro-optic converter and converts it into the OAM corresponding to the non-zero element in x[k] to obtain an OAM beam for integrated communication and sensing.

[0140] Next, in combination with Figure 6 and Figure 7 A detailed description will be given of another specific embodiment of the present application.

[0141] As Figure 6 and Figure 7 shown, in an embodiment of the present application, an FMCW signal is used for sensing, and single-channel OAM uses PAM to generate OAM symbols for communication.

[0142] Figure 6 Figure is a schematic structural diagram of an FMCW signal as a sensing signal. Each sensing signal period T s contains N c OAM symbols. Each OAM symbol contains a chirp signal. The chirp signal has a continuously changing frequency within the same sensing signal period and has lower sidelobes than a simple pulse when measuring distance using a correlation function, thereby enhancing the anti-interference ability of the sensing signal. An FMCW signal that only contains the rising edge, chirp period T s and chirp bandwidth B s can be selected. After being converted into a real signal and adding a DC bias, it can be expressed as:

[0143]

[0144] Since single-channel OAM and PAM are adopted, the OAM symbols to be sent satisfy that there is only one non-zero element in x[k].

[0145] Furthermore, the embodiments of the present application can adopt Figure 7 The structure shown in Figure converts the sensing signal s(t) onto an electro-optic converter and converts it into the OAM and amplitude corresponding to the non-zero element in x[k] to obtain an OAM beam for integrated communication and sensing.

[0146] In some embodiments, the pulse signal for sensing can be spread spectrum to solve multi-user interference, enhance security, or increase communication capacity. Among them, unipolar real-valued spreading sequences are applicable to the scenarios of this embodiment. For example, m-sequences, Gold sequences, chaotic sequences, etc.

[0147] Assume that only one spreading sequence is used and a spreading sequence of length L is generated, that is:

[0148] c = (c0, c1,... c L-1 ), c i ∈{0, 1}.

[0149] Next, in combination with Figure 8 and Figure 9 , another specific embodiment of the present application will be elaborated in detail.

[0150] As Figure 8 and Figure 9 shown, in an embodiment of the present application, a pulse signal with a spreading sequence is used for sensing, and multi-path OAM uses OAM keying for communication.

[0151] The spread-spectrum pulse signal can be expressed as:

[0152]

[0153] Figure 8 is a schematic structural diagram of a pulse with a spreading sequence as a sensing signal. On the basis of the above Figure 4 , a simple pulse can be replaced with a spreading sequence.

[0154] Among them, the spreading sequence can be a single spreading sequence to achieve the ability of multi-user recognition and anti-interference. Or, the spreading sequence can be a group of spreading sequences. In addition to providing multi-user recognition and anti-interference capabilities, the security of communication and sensing can be enhanced by the method of hopping sequences, and additional communication capacity can be provided for the system by transmitting different sequences.

[0155] Furthermore, the embodiment of the present application can use a single spreading sequence c, and the generated sensing signal is:

[0156]

[0157] Due to the use of multi-path OAM, there may be multiple non-zero elements in x[k], and the sensing signal needs to be normalized to obtain the normalized sensing signal

[0158] Furthermore, the embodiment of the present application can adopt the structure shown in Figure 9 , and the normalized sensing signals are respectively loaded into l NOn an electro-optical converter, and convert it into the OAM and amplitude corresponding to the non-zero elements in x[k], to obtain an OAM beam for integrated communication and sensing.

[0159] The following combines Figure 10 and Figure 11 , and elaborate in detail on another specific embodiment of this application.

[0160] As Figure 10 and Figure 11 shown, in an embodiment of this application, a pulse signal with a spreading sequence is used for sensing, and through pulse position modulation, the pulse position modulation symbol is loaded onto the sensing signal, so that in addition to being able to transmit L1 bits with OAM for each OAM symbol, it can also transmit L2 bits with pulse position modulation; multiplexed OAM uses OAM multiplexing, which can not only provide communication capabilities as a communication scheme, but also expand the communication capacity of the system as a multiplexing scheme.

[0161] Figure 10 FIG. is a schematic structural diagram of a pulse with a spreading sequence and pulse position modulation as a sensing signal. On the basis of the above Figure 8 , the position of the spreading sequence within the OAM symbol is random.

[0162] Furthermore, in the embodiment of this application, by performing pulse position modulation on the spreading sequence, additional communication capacity can be provided for the system. Through appropriate communication bit precoding and mapping, pulse position modulation can also improve the autocorrelation performance of the sensing signal. The generated sensing signal is:

[0163]

[0164] where τ0 is the symbol spacing of the pulse position modulation.

[0165] Due to the use of multiplexed OAM, there may be multiple non-zero elements in x[k], and it is necessary to perform normalization processing on the sensing signal to obtain the normalized sensing signal When OAM is used as a communication scheme, the structure shown in Figure 11 is adopted. The normalized sensing signals are respectively loaded onto l N electro-optical converters, and converted into the OAM and amplitude corresponding to the non-zero elements in x[k], to obtain an OAM beam for integrated communication and sensing.

[0166] According to the communication and sensing integrated signal design and generation method for wireless optical proposed in the embodiments of the present application, system parameters can be determined respectively according to communication requirements and sensing requirements, and a sensing signal applicable to wireless optical can be generated. Communication bits can be modulated into orbital angular momentum symbols, and the sensing signal can be loaded onto a single or multiple orbital angular momentum beams corresponding to the orbital angular momentum symbols. Thus, when communicating with a single orbital angular momentum beam, the beam loaded with the orbital angular momentum symbol serves as a communication and sensing integrated signal based on orbital angular momentum for free space optical communication. When communicating with multiple orbital angular momentum beams, different orbital angular momentum beams are synthesized into a single beam to obtain a communication and sensing integrated signal based on orbital angular momentum for free space optical communication. Furthermore, while improving the compatibility of the system and enhancing the flexibility of system design, the security and applicability of the system can be improved. Thereby, problems such as the mutual interference and restriction between communication and sensing in the optical frequency band, the relatively low compatibility of the system, the reduction of the system security and reliability, the reduction of the system applicability, and the inability to meet the needs of users are solved.

[0167] Next, a communication and sensing integrated signal design and generation device for wireless optical proposed in the embodiments of the present application will be described with reference to the accompanying drawings.

[0168] Figure 12 It is a block diagram of a communication and sensing integrated signal design and generation device for wireless optical according to the embodiments of the present application.

[0169] As Figure 12 shown, the communication and sensing integrated signal design and generation device 10 for wireless optical includes: a determination module 100, a generation module 200, a modulation module 300, and a synthesis module 400.

[0170] Specifically, the determination module 100 is configured to determine system parameters respectively according to communication requirements and sensing requirements.

[0171] The generation module 200 is configured to generate a sensing signal applicable to wireless optical based on the system parameters.

[0172] The modulation module 300 is configured to modulate communication bits into orbital angular momentum symbols, and load the sensing signal onto a single or multiple orbital angular momentum beams corresponding to the orbital angular momentum symbols.

[0173] The synthesis module 400 is configured to, when communicating with a single orbital angular momentum beam, use the beam loaded with the orbital angular momentum symbol as a communication and sensing integrated signal based on orbital angular momentum for free space optical communication. When communicating with multiple orbital angular momentum beams, different orbital angular momentum beams are synthesized into a single beam to obtain a communication and sensing integrated signal based on orbital angular momentum for free space optical communication.

[0174] Optionally, in an embodiment of the present application, the determination module 100 includes: a first sensing determination unit and a second sensing determination unit.

[0175] Among them, the first sensing determination unit is used to determine the period and protection interval of the sensing signal according to the sensing refresh rate and the maximum unambiguous distance.

[0176] The second sensing determination unit is used to determine the bandwidth of the sensing signal according to the distance resolution requirement.

[0177] Optionally, in an embodiment of the present application, the determination module 100 includes: a first communication determination unit and a second communication determination unit.

[0178] Among them, the first communication determination unit is used to select single or multiple orbital angular momenta from the available orbital angular momenta, generate an orbital angular momentum symbol table for communication, and determine the number of bits transmitted by a single orbital angular momentum symbol.

[0179] The second communication determination unit is used to determine the orbital angular momentum symbol period and the number of orbital angular momentum symbols within a single sensing signal period according to the communication rate requirement and the number of bits.

[0180] Optionally, in an embodiment of the present application, modulating the communication bits into orbital angular momentum symbols may be on-off keying of orbital angular momentum, pulse amplitude modulation, or keying or multiplexing of multiple orbital angular momenta.

[0181] Optionally, in an embodiment of the present application, the sensing signals available for wireless light include simple pulse signals, spread-spectrum pulse signals, amplitude-modulated continuous signals, and frequency-modulated continuous signals.

[0182] Optionally, in an embodiment of the present application, the modulation module 300 includes: a first processing unit and a modulation unit.

[0183] Among them, the first processing unit is used to perform channel coding on the communication bits and group them according to the number of bits to obtain the coded communication bits.

[0184] The modulation unit is used to modulate the coded communication bits into orbital angular momentum symbols according to the orbital angular momentum symbol table.

[0185] Optionally, in an embodiment of the present application, the processing module 300 includes: a second processing unit and a third processing unit.

[0186] Among them, the second processing unit is used to load the sensing signal onto the light beam when using a single-channel orbital angular momentum light beam for communication, so that the light beam has the orbital angular momentum corresponding to the orbital angular momentum symbol.

[0187] A third processing unit, configured to normalize a sensed signal according to an orbital angular momentum symbol when communicating using a multi-path orbital angular momentum beam, obtain a normalized sensed signal, and respectively load the normalized sensed signal onto multiple beams corresponding to the orbital angular momentum symbols, so as to convert the normalized sensed signal into an orbital angular momentum beam.

[0188] Optionally, in an embodiment of the present application, the sensed signal available for wireless light may further carry communication information through on-off keying, pulse amplitude modulation, pulse position modulation, or orthogonal frequency division multiplexing.

[0189] It should be noted that the foregoing explanation of the embodiments of the method for designing and generating an integrated communication and sensing signal for wireless light is also applicable to the device for designing and generating an integrated communication and sensing signal for wireless light in this embodiment, and will not be elaborated here.

[0190] According to the device for designing and generating an integrated communication and sensing signal for wireless light proposed in the embodiments of the present application, system parameters can be determined respectively according to communication requirements and sensing requirements, and a sensed signal available for wireless light can be generated. Communication bits can be modulated into orbital angular momentum symbols, and the sensed signal can be loaded onto a single or multiple orbital angular momentum beams corresponding to the orbital angular momentum symbols. Thus, when communicating using a single orbital angular momentum beam, the beam loaded with the orbital angular momentum symbol is an integrated communication and sensing signal for free-space optical communication based on orbital angular momentum. When communicating using multiple orbital angular momentum beams, different orbital angular momentum beams are synthesized into a single beam to obtain an integrated communication and sensing signal for free-space optical communication based on orbital angular momentum. Furthermore, while improving the compatibility of the system and enhancing the flexibility of system design, the security and applicability of the system can be improved. Thereby, the problems that in the optical frequency band, communication and sensing in the integrated communication and sensing interfere with each other and restrict each other, the compatibility of the system is relatively low, the security and reliability of the system are reduced, the applicability of the system is reduced, and the needs of users cannot be met are solved.

[0191] Figure 13 The structural schematic diagram of the electronic device provided in the embodiments of the present application. The electronic device may include:

[0192] A memory 1301, a processor 1302, and a computer program stored on the memory 1301 and executable on the processor 1302.

[0193] When the processor 1302 executes the program, it implements the method for designing and generating an integrated communication and sensing signal for wireless light provided in the foregoing embodiments.

[0194] Furthermore, the electronic device further includes:

[0195] A communication interface 1303 for communication between the memory 1301 and the processor 1302.

[0196] A memory 1301 for storing computer programs that can run on the processor 1302.

[0197] The memory 1301 may include high-speed RAM memory and may also include non-volatile memory, such as at least one disk memory.

[0198] If the memory 1301, the processor 1302, and the communication interface 1303 are implemented independently, the communication interface 1303, the memory 1301, and the processor 1302 can be interconnected through a bus and communicate with each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 13 only a thick line is used to represent it in the figure, but it does not mean that there is only one bus or one type of bus.

[0199] Optionally, in a specific implementation, if the memory 1301, the processor 1302, and the communication interface 1303 are integrated on a chip, the memory 1301, the processor 1302, and the communication interface 1303 can communicate with each other through an internal interface.

[0200] The processor 1302 may be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0201] The embodiments of the present application also provide a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the above-mentioned communication perception integrated signal design and generation method for wireless light is implemented.

[0202] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or N embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0203] In addition, the terms "first" and "second" are used only for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, the meaning of "N" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0204] Any process or method description shown in a flowchart or described in other ways herein can be understood to represent a module, segment, or portion of code including one or N executable instructions for implementing a customized logic function or process, and the scope of the preferred embodiments of this application includes additional implementations, where the functions can be executed in a substantially simultaneous manner or in a reverse order according to the functions involved, rather than in the order shown or discussed, which should be understood by those skilled in the art to which the embodiments of this application belong.

[0205] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a definable sequence list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other systems that can fetch and execute instructions from the instruction execution system, apparatus, or device), or in conjunction with these instruction execution systems, apparatus, or devices. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by or in conjunction with an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection portion (electronic device) having one or N wirings, a portable computer disk cartridge (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium can even be paper or other suitable media on which the program can be printed, because the program can be obtained electronically by optically scanning the paper or other media, followed by editing, interpretation, or other suitable processing as necessary, and then stored in a computer memory.

[0206] It should be understood that various parts of the present application can be implemented using hardware, software, firmware, or a combination thereof. In the above-described embodiments, the N steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. If implemented using hardware, as in another embodiment, any one or a combination of the following techniques well-known in the art can be used: discrete logic circuits having logic gate circuits for implementing logical functions on data signals, application-specific integrated circuits having suitable combinational logic gate circuits, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0207] Those of ordinary skill in the art of this technology can understand that all or part of the steps carried by the method of implementing the above embodiments can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiments.

[0208] In addition, in each embodiment of the present application, each functional unit can be integrated into a processing module, or each unit can exist physically alone, or two or more units can be integrated into one module. The above-mentioned integrated module can be implemented in the form of hardware or in the form of a software functional module. When the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0209] The above-mentioned storage medium can be a read-only memory, a magnetic disk, an optical disc, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A method for designing and generating integrated communication and sensing signals for wireless optical communication, characterized in that, It includes the following steps: Determine system parameters according to communication requirements and sensing requirements respectively; Generate a sensing signal for wireless optical communication based on the system parameters; Modulate communication bits into orbital angular momentum symbols, and load the sensing signal onto a single or multiple orbital angular momentum beams corresponding to the orbital angular momentum symbols; and If a single orbital angular momentum beam is used for communication, the beam loaded with the orbital angular momentum symbol is used as an integrated communication and sensing signal based on orbital angular momentum for free-space optical communication. If multiple orbital angular momentum beams are used for communication, different orbital angular momentum beams are combined into a single beam to obtain the integrated communication and sensing signal based on orbital angular momentum for free-space optical communication.

2. The method according to claim 1, characterized in that, The determination of system parameters according to communication requirements and sensing requirements respectively includes: Determine the period and guard interval of the sensing signal according to the sensing refresh rate and the maximum unambiguous distance; Determine the bandwidth of the sensing signal according to the distance resolution requirement.

3. The method according to claim 1, characterized in that, The determination of system parameters according to communication requirements and sensing requirements respectively includes: Select a single or multiple orbital angular momenta from the available orbital angular momenta to generate an orbital angular momentum symbol table for communication, so as to determine the number of bits transmitted by a single orbital angular momentum symbol; Determine the orbital angular momentum symbol period and the number of orbital angular momentum symbols within a single sensing signal period according to the communication rate requirement and the number of bits.

4. The method according to claim 1, wherein The method of modulating communication bits into the orbital angular momentum symbols includes on-off keying of orbital angular momentum, pulse amplitude modulation, or keying or multiplexing of multiple orbital angular momenta.

5. The method according to claim 1, characterized in that, The sensing signal for wireless optical communication includes a simple pulse signal, a spread-spectrum pulse signal, an amplitude-modulated continuous signal, and a frequency-modulated continuous signal.

6. The method according to claim 3, wherein The modulation of communication bits into orbital angular momentum symbols includes: Perform channel coding on the communication bits and group them according to the number of bits to obtain coded communication bits; Modulate the coded communication bits into the orbital angular momentum symbols according to the orbital angular momentum symbol table.

7. The method according to claim 1, wherein The loading of the sensing signal onto a single or multiple orbital angular momentum beams corresponding to the orbital angular momentum symbols includes: When using a single-channel orbital angular momentum beam for communication, load the sensing signal onto the beam so that the beam has the orbital angular momentum corresponding to the orbital angular momentum symbol; When using multiple-channel orbital angular momentum beams for communication, normalize the sensing signal according to the orbital angular momentum symbol to obtain a normalized sensing signal, and load the normalized sensing signal onto multiple beams corresponding to the orbital angular momentum symbols respectively to convert them into orbital angular momentum beams.

8. The method according to claim 4, characterized in that, The sensing signal for wireless optical communication carries communication information through on-off keying, pulse amplitude modulation, pulse position modulation, or orthogonal frequency division multiplexing.

9. A communication and sensing integrated signal design and generation device for wireless optical, characterized in that, It includes: A determination module for determining system parameters according to communication requirements and sensing requirements respectively; A generation module for generating a sensing signal for wireless optical communication based on the system parameters; A modulation module, configured to modulate communication bits into orbital angular momentum symbols, and load the sensing signal onto single or multiple orbital angular momentum beams corresponding to the orbital angular momentum symbols; and A synthesis module, configured to, when communicating using the single orbital angular momentum beam, use the beam loaded with the orbital angular momentum symbol as a communication and sensing integrated signal based on orbital angular momentum for free space optical communication, and when communicating using the multiple orbital angular momentum beams, synthesize different orbital angular momentum beams into a single beam to obtain the communication and sensing integrated signal based on orbital angular momentum for free space optical communication.

10. An electronic device, characterized in that, Comprising: A memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor executes the program to implement the method for designing and generating a communication and sensing integrated signal for wireless optical communication according to any one of claims 1-8.

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