A method and system for optical millimeter wave sensing fusion communication

Abstract

The present invention provides a method and system for optical millimeter wave perception fusion communication, including: dividing an optical carrier into two optical signals, modulating the two optical signals, generating a first optical sideband signal and a second optical sideband signal, and generating a polarization interleaved optical signal; performing power compensation on the polarization interleaved optical signal, and dividing the compensated polarization interleaved optical signal into multiple polarization interleaved optical signals; processing a single polarization interleaved optical signal in the multiple polarization interleaved optical signals to obtain a multiplexed optical millimeter wave for communication and perception. The optical millimeter wave perception communication fusion architecture proposed in the present invention effectively reduces the demand for high-bandwidth equipment and the demand for spectrum bandwidth occupation by polarization interleaving the signal sidebands and local oscillator sidebands for perception and communication. Polarization-insensitive filtering eliminates the need for complex polarization tracking circuits and polarization demultiplexing algorithms, simplifies the remote structure, and reduces the complexity of user-end signal processing. It has great application potential in B5G optical wireless networks.

Description

Technical Field

[0001] The present invention relates to the field of optical communication technology, and in particular to an optical millimeter-wave sensing fusion communication method and system. Background Art

[0002] With the rapid development of services such as unmanned driving, smart factories, and smart homes, the application of Beyond Fifth Generation in mobile communication system (B5G) has put forward an urgent need for high-precision perception and ultra-high-speed communication. The realization of ultra-high precision perception and ultra-high communication rate is inseparable from the support of ultra-high frequency and ultra-large working bandwidth. Therefore, radar and mobile communications are moving towards the millimeter wave frequency band, relying on the rich spectrum resources of millimeter wave technology to achieve centimeter-level perception accuracy and hundreds of Gbps-level communication rate.

[0003] In the B5G distributed millimeter wave network, due to the severe attenuation caused by coaxial cables, the ultra-low transmission loss radio-over-fiber (RoF) technology shows great application potential. In addition, the centralized processing characteristics of the RoF link can greatly simplify the structure of the remote unit (RU). In high-precision perception systems, linear frequency modulated (LFM) waves with large time-bandwidth products are widely used, which is very different from waveforms such as quadrature amplitude modulation (QAM) commonly used in communication systems. Due to different signal formats, the most direct way to integrate communication and perception in the RoF link is frequency division multiplexing. In order to reduce the spectrum crosstalk between the two optical signals of frequency division multiplexing in the RoF link, polarization multiplexing technology can be used. However, directly polarization multiplexing the millimeter wave signal will increase the system's requirements for device bandwidth and waste part of the spectrum resources. The use of polarization tracking circuits will increase the complexity of the system RU, and the use of polarization demultiplexing algorithms will increase the complexity and power consumption of the user-side digital signal processing (DSP) algorithm. In addition, when millimeter waves are transmitted in RoF links, there will be power attenuation introduced by fiber dispersion, which will deteriorate the signal quality.

[0004] Therefore, it is necessary to propose a new method of integrating optical millimeter-wave communication with perception communication to achieve seamless integration of millimeter-wave communication and perception. Summary of the invention

[0005] The present invention provides a method and system for optical millimeter wave perception fusion communication, which are used to solve the defects of polarization multiplexing of RoF links in the existing optical millimeter wave technology, resulting in large transmission bandwidth between devices, waste of spectral resources, and overly complex polarization demultiplexing algorithms, so as to achieve seamless integration of millimeter wave communication and perception.

[0006] In a first aspect, the present invention provides a method for optical millimeter wave sensing fusion communication, comprising:

[0007] Splitting the optical carrier into two optical signals, modulating the two optical signals to generate a first optical sideband signal and a second optical sideband signal, and generating a polarization interleaved optical signal based on the first optical sideband signal and the second optical sideband signal;

[0008] Performing power compensation on the polarization-interleaved optical signal, and dividing the compensated polarization-interleaved optical signal into multiple polarization-interleaved optical signals;

[0009] A single polarization-interleaved optical signal among the multiple polarization-interleaved optical signals is split, filtered, photoelectrically converted and power amplified to obtain a multiplexed optically-carried millimeter wave.

[0010] According to an optical millimeter-wave sensing fusion communication method provided by the present invention, the optical carrier is divided into two optical signals, the two optical signals are modulated to generate a first optical sideband signal and a second optical sideband signal, and a polarization interleaved optical signal is generated based on the first optical sideband signal and the second optical sideband signal, including:

[0011] The optical carrier generated by the laser is divided into a first optical signal and a second optical signal by a first optical coupler;

[0012] Performing optical sideband processing on the first optical signal and the second optical signal respectively to obtain a plurality of optical sideband signals;

[0013] Optically splitting a plurality of optical sideband signals in sequence and then recombining them to obtain the first optical sideband signal and the second optical sideband signal;

[0014] The polarization-interleaved optical signal is obtained by performing polarization interleaving on the first optical sideband signal and the second optical sideband signal.

[0015] According to a method for optical millimeter-wave sensing fusion communication provided by the present invention, the first optical signal and the second optical signal are respectively subjected to optical sideband processing to obtain a plurality of optical sideband signals, including:

[0016] Inputting the first optical signal into a synaesthesia sideband generator to obtain a communication optical sideband signal and a perception optical sideband signal;

[0017] The second optical signal is input into a dual-tone local oscillator generator to obtain a first local oscillator optical sideband signal and a second local oscillator optical sideband signal.

[0018] According to a method for optical millimeter-wave sensing fusion communication provided by the present invention, the optical splitting of multiple optical sideband signals in sequence and then recombining them to obtain the first optical sideband signal and the second optical sideband signal includes:

[0019] Inputting the communication optical sideband signal and the perception optical sideband signal into a first multi-channel optical filter for branching, and inputting the first local oscillator optical sideband signal and the second local oscillator optical sideband signal into a second multi-channel optical filter for branching;

[0020] combining the sensed optical sideband signal and the second local oscillator optical sideband signal by a second optical coupler to obtain the first optical sideband signal;

[0021] The communication optical sideband signal and the first local oscillator optical sideband signal are combined by a third optical coupler to obtain the second optical sideband signal.

[0022] According to a method for optical millimeter-wave sensing fusion communication provided by the present invention, the polarization-interleaving of the first optical sideband signal and the second optical sideband signal to obtain the polarization-interleaved optical signal includes:

[0023] Inputting the first optical sideband signal into a first polarization controller to perform polarization state alignment to obtain the first optical sideband signal after polarization state alignment;

[0024] Inputting the second optical sideband signal into a second polarization controller and then performing polarization state alignment to obtain the second optical sideband signal after polarization state alignment;

[0025] The polarization beam combiner performs polarization interleaving on the first optical sideband signal and the second optical sideband signal after polarization state alignment, and outputs the polarization interleaved optical signal.

[0026] According to a method for optical millimeter-wave sensing fusion communication provided by the present invention, the power compensation of the polarization-interleaved optical signal is performed, and the compensated polarization-interleaved optical signal is divided into multiple polarization-interleaved optical signals, including:

[0027] Inputting the polarization-interleaved optical signal into an erbium-doped optical fiber amplifier for power compensation to obtain the compensated polarization-interleaved optical signal;

[0028] The compensated polarization-interleaved optical signal is distributed into multiple optical resources by an optical splitter to obtain the multiple polarization-interleaved optical signals.

[0029] According to a method for optical millimeter wave sensing fusion communication provided by the present invention, the single polarization interleaved optical signal in the multi-path polarization interleaved optical signal is split, filtered, photoelectrically converted and power amplified to obtain a multiplexed optical millimeter wave, including:

[0030] Splitting the single-path polarization-interleaved optical signal into a first polarization-interleaved optical signal and a second polarization-interleaved optical signal by a fourth optical coupler;

[0031] Performing optical bandpass filtering on the first polarization-interleaved optical signal and the second polarization-interleaved optical signal respectively to obtain a plurality of polarization-interleaved optical signals;

[0032] Performing photoelectric conversion and power amplification on the multiple polarization-interleaved optical signals to obtain multiple millimeter waves;

[0033] The multiple millimeter waves are radiated to a user end through different antennas, so that the user end obtains the multiplexed optically-carried millimeter waves.

[0034] According to a method for optical millimeter-wave sensing fusion communication provided by the present invention, the first polarization-interleaved optical signal and the second polarization-interleaved optical signal are respectively subjected to optical bandpass filtering to obtain a plurality of polarization-interleaved optical signals, including:

[0035] Inputting the first polarization-interleaved optical signal into a first optical bandpass filter, filtering the first local oscillation optical sideband signal, and obtaining a perceived polarization-interleaved optical signal;

[0036] The second polarization-interleaved optical signal is input into a second optical bandpass filter to filter the second local oscillation optical sideband signal to obtain a communication polarization-interleaved optical signal.

[0037] According to a method for optical millimeter wave sensing fusion communication provided by the present invention, the photoelectric conversion and power amplification of the multiple polarization interleaved optical signals are performed to obtain multiple millimeter waves, including:

[0038] The first photodetector performs photoelectric conversion on the sensed polarization interleaved optical signal, and amplifies the signal through a first power amplifier to obtain a sensed millimeter wave;

[0039] The communication polarization interleaved optical signal is photoelectrically converted by a second photodetector and amplified by a second power amplifier to obtain a communication millimeter wave.

[0040] According to a method for sensing and fusion communication of millimeter waves over light provided by the present invention, radiating the multiple millimeter waves to a user terminal through different antennas so that the user terminal obtains the multiplexed millimeter waves over light includes:

[0041] The sensing millimeter wave is radiated to the user end through the first antenna, and the communication millimeter wave is radiated to the user end through the second antenna;

[0042] The user end receives the multiplexed optically-carried millimeter wave composed of the sensing millimeter wave and the communication millimeter wave through a fourth antenna.

[0043] According to a method for sensing and fusion communication over millimeter waves on light provided by the present invention, a single polarization interleaved optical signal in the multiple polarization interleaved optical signals is split, filtered, photoelectrically converted and power amplified to obtain a multiplexed optical millimeter wave, and the multiplexed optical millimeter wave is used to communicate with a user end, and then the method further includes:

[0044] The third antenna receives the perceived reflected echo of the user terminal, performs signal processing on the perceived reflected echo, and obtains the user terminal location information.

[0045] In a second aspect, the present invention further provides an optical millimeter wave sensing fusion communication system, comprising:

[0046] A central unit, a distributed unit and at least one remote unit, wherein the central unit is sequentially connected to the distributed unit and the at least one remote unit via a single-mode optical fiber, wherein:

[0047] The central unit is used to split and modulate the optical carrier to obtain multiple optical sideband signals, and generate polarization interleaved optical signals based on the multiple optical sideband signals;

[0048] The distributed unit is used to perform power compensation on the polarization-interleaved optical signal and distribute and output multiple polarization-interleaved optical signals;

[0049] The at least one remote unit is used to convert one polarization-interleaved optical signal among the multiple polarization-interleaved optical signals into a multiplexed optical-carrying millimeter wave for sensing communication with a user end.

[0050] According to an optical millimeter wave sensing fusion communication system provided by the present invention, the central unit includes a laser, a synaesthesia sideband generator, a two-tone local oscillator generator and a first optical coupler, wherein:

[0051] The laser is used to output an optical carrier;

[0052] The first optical coupler is used to split the optical carrier into a first optical signal and a second optical signal;

[0053] The synaesthesia sideband generator is used to generate a communication optical sideband signal and a perception optical sideband signal after performing asymmetric single sideband modulation on the first optical signal;

[0054] The dual-tone local oscillator generator is used to generate a first local oscillator optical sideband signal and a second local oscillator optical sideband signal from the second optical signal.

[0055] According to an optical millimeter wave sensing fusion communication system provided by the present invention, the central unit further includes a second optical coupler, a third optical coupler, a first multi-channel optical filter and a second multi-channel optical filter, wherein:

[0056] The first multi-channel optical filter comprises a first upper output port and a first lower output port, and the first multi-channel optical filter is used to output the communication optical sideband signal and the perception optical sideband signal to the third optical coupler through the first upper output port, and output the perception optical sideband signal to the second optical coupler through the first lower output port after splitting the communication optical sideband signal and the perception optical sideband signal;

[0057] The second multi-channel optical filter comprises a second upper output port and a second lower output port, and the second multi-channel optical filter is used for outputting the first local oscillation optical sideband signal to the third optical coupler through the second upper output port and outputting the second local oscillation optical sideband signal to the second optical coupler through the second lower output port after splitting the first local oscillation optical sideband signal and the second local oscillation optical sideband signal;

[0058] The second optical coupler is used to combine the perceived optical sideband signal and the second local oscillator optical sideband signal to output the first optical sideband signal;

[0059] The third optical coupler is used to combine the communication optical sideband signal and the first local oscillator optical sideband signal to output the second optical sideband signal.

[0060] According to a millimeter-wave optical sensing fusion communication system provided by the present invention, the central unit further includes a first polarization controller, a second polarization controller and a polarization combiner, wherein:

[0061] The first polarization controller is used to align the polarization state of the first optical sideband signal and then input it into the first input port of the polarization beam combiner;

[0062] The second polarization controller is used to align the polarization state of the second optical sideband signal and then input it into the second input port of the polarization beam combiner;

[0063] The polarization beam combiner is used to perform polarization interleaving on the first optical sideband signal and the second optical sideband signal after the polarization states are aligned to obtain the polarization interleaved optical signal.

[0064] According to a millimeter-wave optical sensing fusion communication system provided by the present invention, the distributed unit includes an erbium-doped fiber amplifier and an optical splitter, wherein:

[0065] The erbium-doped fiber amplifier is used to perform power compensation on the polarization-interleaved optical signal to obtain a compensated polarization-interleaved optical signal;

[0066] The optical splitter is used to distribute the compensated polarization-interleaved optical signal to multiple optical resources to obtain the multiple polarization-interleaved optical signals.

[0067] According to an optical millimeter-wave sensing fusion communication system provided by the present invention, a single remote unit in the at least one remote unit includes a fourth optical coupler, a first optical bandpass filter and a second optical bandpass filter, wherein:

[0068] The fourth optical coupler is used to split the single-path polarization-interleaved optical signal into a first polarization-interleaved optical signal and a second polarization-interleaved optical signal;

[0069] The first optical bandpass filter is used to receive the first polarization-interleaved optical signal, filter the first local oscillation optical sideband signal in the first polarization-interleaved optical signal, and obtain a perceived polarization-interleaved optical signal;

[0070] The second optical bandpass filter is used to receive the second polarization-interleaved optical signal, filter the second local oscillation optical sideband signal in the second polarization-interleaved optical signal, and obtain a communication polarization-interleaved optical signal.

[0071] According to an optical millimeter wave sensing fusion communication system provided by the present invention, the single remote unit further includes a first photodetector, a second photodetector, a first power amplifier, a second power amplifier, a first antenna and a second antenna, wherein:

[0072] The first photodetector is used to perform photoelectric conversion on the perceived polarization interleaved optical signal to obtain a perceived polarization interleaved electrical signal;

[0073] The second photodetector is used to perform photoelectric conversion on the communication polarization interleaved optical signal to obtain a communication polarization interleaved electrical signal;

[0074] The first power amplifier is used to amplify the power of the perceived polarization interleaved electrical signal to obtain a perceived millimeter wave;

[0075] The second power amplifier is used to amplify the power of the communication polarization interleaved electrical signal to obtain a communication millimeter wave;

[0076] The first antenna is used to radiate the sensing millimeter wave to the fourth antenna of the user end;

[0077] The second antenna is used to radiate the communication millimeter wave to the fourth antenna of the user end, so that the user end processes the communication millimeter wave and obtains downlink communication information.

[0078] According to an optical millimeter-wave sensing fusion communication system provided by the present invention, the single remote unit also includes a third antenna, and the third antenna is used to receive the sensing reflection echo of the user end, perform signal processing on the sensing reflection echo, and obtain the user end location information.

[0079] The optical millimeter-wave sensing fusion communication method and system provided by the present invention effectively reduces the demand for high-bandwidth equipment and the demand for spectrum bandwidth occupancy by polarization interleaving the signal sidebands and local oscillator sidebands for sensing and communication. Polarization-insensitive filtering eliminates the need for complex polarization tracking circuits and polarization demultiplexing algorithms, simplifies the remote structure, and reduces the complexity of user-side signal processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0080] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0081] Figure 1 It is a flow chart of the optical millimeter wave sensing fusion communication method provided by the present invention;

[0082] Figure 2 It is a system structure diagram of the optical millimeter wave communication perception fusion architecture provided by the present invention;

[0083] Figure 3 It is a schematic diagram of generating communication optical sideband and sensing optical sideband provided by the present invention;

[0084] Figure 4 It is a schematic diagram of generating a local oscillator optical sideband signal provided by the present invention;

[0085] Figure 5 is a schematic diagram of a first optical sideband signal provided by the present invention;

[0086] Figure 6 is a schematic diagram of a second optical sideband signal provided by the present invention;

[0087] Figure 7 is a schematic diagram of polarization interleaved optical signals provided by the present invention;

[0088] Figure 8 It is a schematic diagram of the perceived polarization interleaved optical signal provided by the present invention;

[0089] Fig. 9 It is a schematic diagram of the communication polarization interleaved optical signal provided by the present invention;

[0090] Fig.10It is a specific structural diagram of the optical millimeter wave communication perception fusion architecture provided by the present invention. DETAILED DESCRIPTION

[0091] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are 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.

[0092] In view of the deficiencies in the prior art, the present invention proposes a new optical millimeter-wave perception fusion communication method and system to achieve seamless integration of millimeter-wave communication and perception.

[0093] Figure 1 : is a flow chart of the optical millimeter wave sensing fusion communication method provided by the present invention, such as Figure 1 As shown, including:

[0094] Step S1, dividing an optical carrier into two optical signals, modulating the two optical signals to generate a first optical sideband signal and a second optical sideband signal, and generating a polarization interleaved optical signal based on the first optical sideband signal and the second optical sideband signal;

[0095] Step S2, performing power compensation on the polarization-interleaved optical signal, and dividing the compensated polarization-interleaved optical signal into multiple polarization-interleaved optical signals;

[0096] Step S3, performing branching, filtering, photoelectric conversion and power amplification on a single polarization-interleaved optical signal among the multiple polarization-interleaved optical signals to obtain a multiplexed optically-carried millimeter wave.

[0097] It should be noted that the optical millimeter wave sensing fusion communication method proposed in the present invention is based on the optical millimeter wave communication sensing fusion architecture, which is used for B5G mobile communication. The specific structure is as follows Figure 2 The architecture mainly includes a central unit (CU), a distributed unit (DU), N (N is a positive integer) remote units (RU) and corresponding user units (User).

[0098] First, the CU processes the optical carrier and divides the optical carrier into two optical signals, and performs a series of modulation on the two divided optical signals to generate a first optical sideband signal and a second optical sideband signal, and polarization interleaves the first optical sideband signal and the second optical sideband signal to obtain a polarization interleaved optical signal.

[0099] Then, DU performs power compensation on the polarization-interleaved optical signal output by CU to obtain a compensated polarization-interleaved optical signal, and performs multi-path resource allocation on the compensated polarization-interleaved optical signal to obtain multiple polarization-interleaved optical signals, where each polarization-interleaved optical signal is transmitted to a single RU.

[0100] Finally, on the single RU side, the single-channel polarization interleaved optical signal is split, optical bandpass filtered, photoelectrically converted to obtain an electrical signal, and the electrical signal is power amplified to obtain the corresponding optical millimeter wave, which is transmitted to the user end through multiple antennas and combined to form a multiplexed optical millimeter wave to sense the user location information and communicate with the user end.

[0101] The present invention effectively reduces the demand for high-bandwidth equipment and the demand for spectrum bandwidth occupation by polarization interleaving the signal sidebands and local oscillator sidebands for perception and communication. Polarization-insensitive filtering eliminates the need for complex polarization tracking circuits and polarization demultiplexing algorithms, simplifies the remote structure, and reduces the complexity of user-side signal processing.

[0102] Based on the above embodiment, step S1 includes:

[0103] The optical carrier generated by the laser is divided into a first optical signal and a second optical signal by a first optical coupler;

[0104] Performing optical sideband processing on the first optical signal and the second optical signal respectively to obtain a plurality of optical sideband signals;

[0105] Optically splitting a plurality of optical sideband signals in sequence and then recombining them to obtain the first optical sideband signal and the second optical sideband signal;

[0106] The polarization-interleaved optical signal is obtained by performing polarization interleaving on the first optical sideband signal and the second optical sideband signal.

[0107] The performing optical sideband processing on the first optical signal and the second optical signal respectively to obtain a plurality of optical sideband signals includes:

[0108] Inputting the first optical signal into a synaesthesia sideband generator to obtain a communication optical sideband signal and a perception optical sideband signal;

[0109] The second optical signal is input into a dual-tone local oscillator generator to obtain a first local oscillator optical sideband signal and a second local oscillator optical sideband signal.

[0110] The step of optically splitting the plurality of optical sideband signals in sequence and then recombining them to obtain the first optical sideband signal and the second optical sideband signal includes:

[0111] Inputting the communication optical sideband signal and the perception optical sideband signal into a first multi-channel optical filter for branching, and inputting the first local oscillator optical sideband signal and the second local oscillator optical sideband signal into a second multi-channel optical filter for branching;

[0112] combining the sensed optical sideband signal and the second local oscillator optical sideband signal by a second optical coupler to obtain the first optical sideband signal;

[0113] The communication optical sideband signal and the first local oscillator optical sideband signal are combined by a third optical coupler to obtain the second optical sideband signal.

[0114] The step of performing polarization interleaving on the first optical sideband signal and the second optical sideband signal to obtain the polarization interleaved optical signal includes:

[0115] Inputting the first optical sideband signal into a first polarization controller to perform polarization state alignment to obtain the first optical sideband signal after polarization state alignment;

[0116] Inputting the second optical sideband signal into a second polarization controller and then performing polarization state alignment to obtain the second optical sideband signal after polarization state alignment;

[0117] The polarization beam combiner performs polarization interleaving on the first optical sideband signal and the second optical sideband signal after polarization state alignment, and outputs the polarization interleaved optical signal.

[0118] Specifically, at the CU side, a laser diode (LD) generates an optical carrier, which is input to a first optical coupler (OC1) and is divided into a first optical signal and a second optical signal.

[0119] The first optical signal is input into the synesthesia sideband generator, and the second optical signal is input into the dual-tone local oscillator generator. The synesthesia sideband generator is used to realize asymmetric single sideband (SSB) modulation, and the first optical signal generates the communication optical sideband (Com-OSB) and the perception optical sideband (Sen-OSB) located on both sides of the optical carrier. Figure 3 As shown, the asymmetric SSB modulation here can eliminate the power attenuation caused by fiber dispersion in long-distance services; the second optical signal is input into the dual-tone local oscillator generator to generate the first local oscillator optical sideband signal (+LO-OSB) and the second local oscillator optical sideband signal (-LO-OSB), as shown Figure 4 As shown in the figure, since the above four sidebands are generated by the same shared laser, there is no phase noise introduced by the laser frequency deviation.

[0120] Here, the synaesthesia sideband generator can adopt an I / Q modulator, and the two-tone local oscillator generator can adopt a Mach-Zehnder Modulator (MZM), such as Fig.10 As shown, the two sub-MZMs of the I / Q modulator are driven by the real part (Real) and imaginary part (Imag) of the complex signal of the communication (Com) and the sensing (Sen) at an intermediate frequency (IF) frequency. The two sub-MZMs inside the I / Q modulator are biased at the minimum transmission point, and the main MZM inside the I / Q modulator is biased at the orthogonal transmission point to achieve asymmetric single-sideband (SSB) modulation, generating communication sidebands (Com-OSB) and sensing sidebands (Sen-OSB) on both sides of the optical carrier. At the same time, the MZM is driven by a radio frequency local oscillator (LO) signal. The radio frequency LO is used to simultaneously up-convert the Com and Sen signals at the IF frequency to the millimeter wave band. The MZM is biased at the minimum transmission point to achieve carrier suppressed double-sideband modulation, generating two LO optical sidebands (-LO-OSB and +LO-OSB) on both sides of the optical carrier.

[0121] Then, the generated communication optical sideband signal and the perception optical sideband signal are input into the first multi-channel optical filter (Multi-channel Optical Filter1, M-OF1) for branching, and Com-OSB and Sen-OSB are separated; at the same time, -LO-OSB and +LO-OSB are input into the second multi-channel optical filter (M-OF2), and -LO-OSB and +LO-OSB are separated; the second optical coupler (OC2) recombines -LO-OSB and Sen-OSB to obtain the first optical sideband signal, as shown in FIG. Figure 5 As shown, the third optical coupler (OC3) recombines +LO-OSB and Com-OSB to obtain a second optical sideband signal, such as Figure 6 shown.

[0122] In addition, if Fig.10 As shown, the first multi-channel optical filter (M-OF1) can use the first interleaver (InterLeaver, IL1) to separate Com-OSB and Sen-OSB. Similarly, the second multi-channel optical filter (M-OF2) uses the second interleaver (Inter Leaver, IL2) to separate -LO-OSB and +LO-OSB.

[0123] Further, the first optical sideband signal after OC2 coupling is polarized by the first polarization controller (PolarizationController1, PC1) and then injected into the polarization beam combiner (Polarization Beam Combiner, PBC), and the second optical sideband signal after OC3 coupling is polarized by the second polarization controller (PC2) and then injected into the polarization beam combiner (PBC) for polarization interleaving to obtain a polarization interleaved optical signal, such as Figure 7 As shown, -LO-OSB and Sen-OSB are denoted as X polarization (X-pol.), and +LO-OSB and Com-OSB are denoted as Y polarization (Y-pol.).

[0124] Finally, the output polarization interleaved optical signal is transmitted to DU via single-mode fiber (SMF).

[0125] The present invention saves part of the spectrum resources by adopting polarization interleaving compared with the traditional polarization multiplexing, so that more RUs can be connected within the limited spectrum bandwidth, and introduces asymmetric single-sideband modulation to eliminate the power attenuation introduced by fiber dispersion.

[0126] Based on any of the above embodiments, step S2 includes:

[0127] Inputting the polarization-interleaved optical signal into an erbium-doped optical fiber amplifier for power compensation to obtain the compensated polarization-interleaved optical signal;

[0128] The compensated polarization-interleaved optical signal is distributed into multiple optical resources by an optical splitter to obtain the multiple polarization-interleaved optical signals.

[0129] Specifically, at the DU side, the received polarization-interleaved optical signal is input into an erbium-doped fiber amplifier (EDFA) for power compensation to obtain a compensated polarization-interleaved optical signal.

[0130] An optical splitter (OS) is used to divide the optical signal into N paths for resource allocation to connect N RUs, that is, the polarization-interleaved optical signal split by the OS is transmitted to the N RUs through N sections of single-mode optical fibers (SMF1, ..., SMFn) respectively.

[0131] Based on RoF technology, the present invention realizes seamless integration of communication and perception in the millimeter wave frequency band, and realizes the multiplexing of optical path signal resources, effectively saving transmission resources.

[0132] Based on any of the above embodiments, step S3 includes:

[0133] Splitting the single-path polarization-interleaved optical signal into a first polarization-interleaved optical signal and a second polarization-interleaved optical signal by a fourth optical coupler;

[0134] Performing optical bandpass filtering on the first polarization-interleaved optical signal and the second polarization-interleaved optical signal respectively to obtain a plurality of polarization-interleaved optical signals;

[0135] Performing photoelectric conversion and power amplification on the multiple polarization-interleaved optical signals to obtain multiple millimeter waves;

[0136] The multiple millimeter waves are radiated to a user end through different antennas, so that the user end obtains the multiplexed optically-carried millimeter waves.

[0137] The step of performing optical bandpass filtering on the first polarization-interleaved optical signal and the second polarization-interleaved optical signal to obtain a plurality of polarization-interleaved optical signals comprises:

[0138] Inputting the first polarization-interleaved optical signal into a first optical bandpass filter, filtering the first local oscillation optical sideband signal, and obtaining a perceived polarization-interleaved optical signal;

[0139] The second polarization-interleaved optical signal is input into a second optical bandpass filter to filter the second local oscillation optical sideband signal to obtain a communication polarization-interleaved optical signal.

[0140] The photoelectric conversion and power amplification of the multiple polarization interleaved optical signals to obtain multiple millimeter waves includes:

[0141] The first photodetector performs photoelectric conversion on the sensed polarization interleaved optical signal, and amplifies the signal through a first power amplifier to obtain a sensed millimeter wave;

[0142] The communication polarization interleaved optical signal is photoelectrically converted by a second photodetector and amplified by a second power amplifier to obtain a communication millimeter wave.

[0143] The step of radiating the multiple millimeter waves to a user terminal through different antennas so that the user terminal obtains the multiplexed optically-carried millimeter waves includes:

[0144] The sensing millimeter wave is radiated to the user end through the first antenna, and the communication millimeter wave is radiated to the user end through the second antenna;

[0145] The user end receives the multiplexed optically-carried millimeter wave composed of the sensing millimeter wave and the communication millimeter wave through a fourth antenna.

[0146] Specifically, on a single RU side, the fourth optical coupler (OC4) first divides the polarization-interleaved optical signal into two paths, namely, a first polarization-interleaved optical signal and a second polarization-interleaved optical signal, and inputs them into the first optical bandpass filter (OpticalBandpassFilter1, OBPF1) and the second optical bandpass filter (OBPF2), respectively, wherein OBPF1 suppresses +LO-OSB, and then is used for perception to obtain a perceived polarization-interleaved optical signal, such as Figure 8 As shown, OBPF2 filters out -LO-OSB and then uses it for communication to obtain a communication polarization interleaved optical signal, such as Fig. 9 shown.

[0147] It can be understood that, for the perception channel, the optical signal output by OBPF1 is first input into the first photoelectric detector (Photoelectric Detector1, PD1) for photoelectric conversion. Since optical signals in different polarization states do not beat frequency, only a pure perception signal generated by the beat frequency of -LO-OSB and Sen-OSB is generated in the millimeter wave frequency band. The millimeter wave perception signal generated by PD1 is amplified by the first power amplifier (Power Amplifier1, PA1) to obtain a perception millimeter wave, and the first antenna (HA1) radiates the perception millimeter wave into the air to perceive the surrounding users; for the communication channel, the optical signal output by OBPF2 is first input into the second photoelectric detector (PD2) for photoelectric conversion. Since optical signals in different polarization states do not beat frequency, only a pure communication signal generated by the beat frequency of +LO-OSB and Com-OSB is generated in the millimeter wave frequency band. The millimeter wave communication signal generated by PD2 is amplified by PA2 to obtain a communication millimeter wave, and HA2 radiates the communication millimeter wave into the air to communicate wirelessly with users. The sensing millimeter wave and the communication millimeter wave here constitute a multiplexed optical carrier millimeter wave on the user side. The communication signal received by the user is received by the fourth antenna (HA4) of the user side and then processed by DSP to obtain downlink communication information.

[0148] The polarization interleaved optical signal adopted in the present invention effectively reduces the system's demand for device bandwidth. Due to polarization-insensitive filtering, the use of a polarization tracking circuit at the RU and the use of a polarization demultiplexing algorithm at the user end are avoided.

[0149] Based on any of the above embodiments, step S3 further includes:

[0150] The third antenna receives the perceived reflected echo of the user terminal, performs signal processing on the perceived reflected echo, and obtains the user terminal location information.

[0151] Optionally, in addition to the transmitting antenna, a receiving antenna is also provided on the RU side, such as Figure 2As shown, the third antenna (HA3) receives the reflected echo from the user end through HA3, and then performs DSP processing to obtain and track the user's location information for improving services such as communication quality.

[0152] The present invention obtains user location information in real time by receiving feedback signals from the user end, which facilitates the system to quickly analyze and obtain the communication quality of the user end and to adjust the communication service.

[0153] Figure 2 : is a system structure diagram of the optical millimeter wave communication perception fusion architecture of B5G mobile communication provided by the present invention, such as Figure 2 As shown, including:

[0154] A central unit, a distributed unit and at least one remote unit, wherein the central unit is sequentially connected to the distributed unit and the at least one remote unit via a single-mode optical fiber, wherein:

[0155] The central unit is used to split and modulate the optical carrier to obtain multiple optical sideband signals, and generate polarization interleaved optical signals based on the multiple optical sideband signals;

[0156] The distributed unit is used to perform power compensation on the polarization-interleaved optical signal and distribute and output multiple polarization-interleaved optical signals;

[0157] The at least one remote unit is used to convert one polarization-interleaved optical signal among the multiple polarization-interleaved optical signals into a multiplexed optical-carrying millimeter wave for sensing communication with a user end.

[0158] Specifically, the millimeter-wave optical architecture proposed in the present invention is used for millimeter-wave communication and perception fusion in B5G optical wireless networks. It is divided into three main parts: a central unit (CU), a distributed unit (DU) and N remote units (RU), where N is a positive integer. The three modules are connected by single-mode optical fiber.

[0159] Among them, the central unit splits and modulates the optical carrier to obtain multiple optical sideband signals, and generates polarization-interleaved optical signals based on the multiple optical sideband signals, and sends the polarization-interleaved optical signals to the distributed units through single-mode optical fibers. The distributed units perform power compensation on the polarization-interleaved optical signals, perform resource allocation, and output multiple polarization-interleaved optical signals to connect to multiple remote units, wherein a single remote unit converts the multiple polarization-interleaved optical signals into multiplexed optical-carrier millimeter waves for sensing user location information and communicating with the user end.

[0160] The optical millimeter-wave communication perception fusion architecture proposed in the present invention is based on polarization interleaving and polarization-insensitive filtering. Polarization-insensitive filtering eliminates the need for complex polarization tracking circuits and polarization demultiplexing algorithms, thereby simplifying the system structure at the remote unit and reducing the complexity of digital signal processing at the user end.

[0161] Based on the above embodiment, the central unit includes a laser, a synaesthesia sideband generator, a two-tone local oscillator generator and a first optical coupler, wherein:

[0162] The laser is used to output an optical carrier;

[0163] The first optical coupler is used to split the optical carrier into a first optical signal and a second optical signal;

[0164] The synaesthesia sideband generator is used to generate a communication optical sideband signal and a perception optical sideband signal after performing asymmetric single sideband modulation on the first optical signal;

[0165] The dual-tone local oscillator generator is used to generate a first local oscillator optical sideband signal and a second local oscillator optical sideband signal from the second optical signal.

[0166] Wherein, the central unit further comprises a second optical coupler, a third optical coupler, a first multi-channel optical filter and a second multi-channel optical filter, wherein:

[0167] The first multi-channel optical filter comprises a first upper output port and a first lower output port, and the first multi-channel optical filter is used to output the communication optical sideband signal and the perception optical sideband signal to the third optical coupler through the first upper output port, and output the perception optical sideband signal to the second optical coupler through the first lower output port after splitting the communication optical sideband signal and the perception optical sideband signal;

[0168] The second multi-channel optical filter comprises a second upper output port and a second lower output port, and the second multi-channel optical filter is used for outputting the first local oscillation optical sideband signal to the third optical coupler through the second upper output port and outputting the second local oscillation optical sideband signal to the second optical coupler through the second lower output port after splitting the first local oscillation optical sideband signal and the second local oscillation optical sideband signal;

[0169] The second optical coupler is used to combine the perceived optical sideband signal and the second local oscillator optical sideband signal to output the first optical sideband signal;

[0170] The third optical coupler is used to combine the communication optical sideband signal and the first local oscillator optical sideband signal to output the second optical sideband signal.

[0171] Wherein, the central unit further includes a first polarization controller, a second polarization controller and a polarization beam combiner, wherein:

[0172] The first polarization controller is used to align the polarization state of the first optical sideband signal and then input it into the first input port of the polarization beam combiner;

[0173] The second polarization controller is used to align the polarization state of the second optical sideband signal and then input it into the second input port of the polarization beam combiner;

[0174] The polarization beam combiner is used to perform polarization interleaving on the first optical sideband signal and the second optical sideband signal after the polarization states are aligned to obtain the polarization interleaved optical signal.

[0175] Specifically, the CU includes a laser (LD), three optical couplers (OC1, OC2 and OC3), a synesthesia sideband generator, a two-tone local oscillator generator, two multi-channel optical filters (M-OF1 and M-OF2), two polarization controllers (PC) and a polarization beam combiner (PBC).

[0176] The laser (LD) is used to output an optical carrier, and the first optical coupler (OC1) is used to split the optical carrier into a first optical signal and a second optical signal, one of which is input into a synaesthesia sideband generator, and the other is input into a dual-tone local oscillator generator;

[0177] The synesthesia sideband generator is used to realize asymmetric single sideband (SSB) modulation and generate communication optical sideband signal (Com-OSB) and perception optical sideband signal (Sen-OSB); the dual-tone local oscillator generator generates two first local oscillator optical sideband signals (+LO-OSB) and second local oscillator optical sideband signals (-LO-OSB) located on both sides of the optical carrier;

[0178] The two optical sidebands generated by the synaesthesia sideband generator are input into the first multi-channel optical filter (M-OF1) to separate Com-OSB and Sen-OSB; at the same time, the two optical sidebands generated by the dual-tone local oscillator generator are input into the second multi-channel optical filter (M-OF2) to separate -LO-OSB and +LO-OSB. Subsequently, the second optical coupler (OC2) connects the lower output port of M-OF1 with the lower output port of M-OF2 to recombine -LO-OSB and Sen-OSB to obtain the first optical sideband signal, and the third optical coupler (OC3) connects the upper output port of M-OF1 with the upper output port of M-OF2 to recombine +LO-OSB and Com-OSB to obtain the second optical sideband signal.

[0179] The first polarization controller (PC1) performs polarization state alignment on the first optical sideband signal and then inputs it into the first input port of the polarization beam combiner (PBC). The second polarization controller performs polarization state alignment on the second optical sideband signal and then inputs it into the second input port of the polarization beam combiner (PBC). The polarization beam combiner (PBC) performs polarization interleaving and outputs polarization interleaved optical signals, which are transmitted to the distributed units through single-mode optical fibers.

[0180] The present invention realizes seamless integration of communication and perception in the millimeter wave frequency band, eliminates the power attenuation introduced by fiber dispersion through asymmetric single-sideband modulation, and effectively reduces system noise because all optical sidebands come from the same source laser, avoids the use of frequency offset compensation algorithm, and improves communication performance and perception accuracy.

[0181] Based on any of the above embodiments, the distributed unit includes an erbium-doped fiber amplifier and an optical splitter, wherein:

[0182] The erbium-doped fiber amplifier is used to perform power compensation on the polarization-interleaved optical signal to obtain a compensated polarization-interleaved optical signal;

[0183] The optical splitter is used to distribute the compensated polarization-interleaved optical signal to multiple optical resources to obtain the multiple polarization-interleaved optical signals.

[0184] Specifically, the DU includes an erbium-doped fiber amplifier (EDFA) and an optical splitter (OS).

[0185] The received polarization-interleaved optical signal is first input into an erbium-doped fiber amplifier (EDFA) for power compensation, and then split into N paths by an optical splitter (OS) for resource allocation. The polarization-interleaved optical signal after OS splitting is transmitted to N RUs through N segments of single-mode optical fiber (SMF1, ..., SMFn).

[0186] The present invention saves part of the spectrum resources by adopting polarization interleaving compared with the traditional polarization multiplexing, so that more RUs can be connected within the limited spectrum bandwidth, and introduces asymmetric single-sideband modulation to eliminate the power attenuation introduced by fiber dispersion.

[0187] Based on any of the above embodiments, a single remote unit in the at least one remote unit comprises a fourth optical coupler, a first optical bandpass filter, and a second optical bandpass filter, wherein:

[0188] The fourth optical coupler is used to split the single-path polarization-interleaved optical signal into a first polarization-interleaved optical signal and a second polarization-interleaved optical signal;

[0189] The first optical bandpass filter is used to receive the first polarization-interleaved optical signal, filter the first local oscillation optical sideband signal in the first polarization-interleaved optical signal, and obtain a perceived polarization-interleaved optical signal;

[0190] The second optical bandpass filter is used to receive the second polarization-interleaved optical signal, filter the second local oscillation optical sideband signal in the second polarization-interleaved optical signal, and obtain a communication polarization-interleaved optical signal.

[0191] The single remote unit further comprises a first photodetector, a second photodetector, a first power amplifier, a second power amplifier, a first antenna and a second antenna, wherein:

[0192] The first photodetector is used to perform photoelectric conversion on the perceived polarization interleaved optical signal to obtain a perceived polarization interleaved electrical signal;

[0193] The second photodetector is used to perform photoelectric conversion on the communication polarization interleaved optical signal to obtain a communication polarization interleaved electrical signal;

[0194] The first power amplifier is used to amplify the power of the perceived polarization interleaved electrical signal to obtain a perceived millimeter wave;

[0195] The second power amplifier is used to amplify the power of the communication polarization interleaved electrical signal to obtain a communication millimeter wave;

[0196] The first antenna is used to radiate the sensing millimeter wave to the fourth antenna of the user end;

[0197] The second antenna is used to radiate the communication millimeter wave to the fourth antenna of the user end, so that the user end processes the communication millimeter wave and obtains downlink communication information.

[0198] Specifically, the fourth optical coupler (OC4) first divides the polarization-interleaved optical signal after DU branching into two paths, namely the first polarization-interleaved optical signal and the second polarization-interleaved optical signal; and then respectively inputs the two polarization-interleaved optical signals into two optical bandpass filters (OBPF1 and OBPF2) for filtering.

[0199] OBPF1 filters +LO-OSB for sensing, and obtains a sensing polarization interleaved optical signal; OBPF2 filters -LO-OSB for communication, and obtains a communication polarization interleaved optical signal.

[0200] The first photodetector (PD1) is used to process the perception channel side, and performs photoelectric conversion on the perception polarization interleaved optical signal to obtain a perception polarization interleaved electrical signal; the second photodetector (PD2) is used to process the communication channel side, and performs photoelectric conversion on the communication polarization interleaved optical signal to obtain a communication polarization interleaved electrical signal.

[0201] The first power amplifier (PA1) performs power amplification on the sensing polarization interleaved electrical signal generated by the first photodetector (PD1) to obtain a sensing millimeter wave, which is radiated into the air by the first antenna (HA1) to sense surrounding users; the second power amplifier (PA2) performs power amplification on the communication polarization interleaved electrical signal generated by the second photodetector (PD2) to obtain a communication millimeter wave, which is radiated into the air by the second antenna (HA2) to wirelessly communicate with the user, and the communication signal received by the user is received by the fourth antenna (HA4) at the user end and then processed by DSP to obtain downlink communication information.

[0202] The present invention reduces the bandwidth requirements of the system for modulators and other devices by using polarization interleaved optical signals. In addition, due to polarization-insensitive filtering, the MoF architecture does not use polarization tracking circuits at the RU, nor does it use polarization demultiplexing algorithms at the user to achieve the separation of millimeter wave communication and sensing signals, making the system very easy to integrate photons.

[0203] Based on any of the above embodiments, the single remote unit further includes a third antenna, and the third antenna is used to receive the perceived reflected echo of the user terminal, perform signal processing on the perceived reflected echo, and obtain the user terminal location information.

[0204] Optionally, on the RU side, for sensing millimeter waves, the user end will transmit a sensing reflected echo to the RU, which will receive it through the third antenna (HA3) and further perform DSP processing to obtain and track user location information, and improve services such as communication quality based on the location information.

[0205] The present invention obtains user location information in real time by receiving feedback signals from the user end, which facilitates the system to quickly analyze and obtain the communication quality of the user end and to adjust the communication service.

[0206] The effect of the present invention is illustrated by a specific example below. The experimental conditions include: the total length of the optical fiber is 5.42 km, the intermediate frequency sensing signal is LFM (6-7.15 GHz), the intermediate frequency communication signal is 16QAM (10 GHz, 5.75 GBaud), and the local oscillation frequency is 18 GHz.

[0207] According to the solution proposed in the present invention, the final experimental results include: the occupied spectrum bandwidth is 36 GHz, the millimeter wave perception signal is LFM (24-25.15 GHz), and the millimeter wave communication signal is 16QAM (28 GHz, 5.75 GBaud).

[0208] Due to polarization-insensitive filtering, the suppression ratio of millimeter-wave LFM to 16QAM is 21.3dB, and no power attenuation caused by dispersion is observed. Since frequency offset compensation is not used, the system-perceived distance is basically consistent with the distance measured by the tape measure, with an error of ±15mm.

[0209] Due to polarization-insensitive filtering, the suppression ratio of millimeter-wave 16QAM and LFM is 22.5dB, and no power attenuation introduced by dispersion is observed; due to polarization interleaving, the interference signals LI2 and SSBI2 are suppressed by 18.1dB and 19.9dB respectively; without using frequency offset compensation, the vector error amplitude of the signal is 9.4%, which is much lower than the 3GPP standard value of 12.5%.

[0210] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0211] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0212] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for sensing and fusion communication over millimeter waves over light, characterized in that: include: The optical carrier generated by the laser is divided into a first optical signal and a second optical signal by a first optical coupler; Input the first optical signal into a synaesthesia sideband generator to obtain a communication optical sideband signal and a perception optical sideband signal; input the second optical signal into a dual-tone local oscillator generator to obtain a first local oscillator optical sideband signal and a second local oscillator optical sideband signal; perform optical branching on a plurality of optical sideband signals in sequence and then recombine them to obtain a first optical sideband signal and a second optical sideband signal; perform polarization interleaving on the first optical sideband signal and the second optical sideband signal to obtain a polarization interleaved optical signal, and the synaesthesia sideband generator is used to realize asymmetric single sideband modulation; Performing power compensation on the polarization-interleaved optical signal, and dividing the compensated polarization-interleaved optical signal into multiple polarization-interleaved optical signals; The method comprises: performing branching, filtering, photoelectric conversion and power amplification on a single polarization interleaved optical signal in the multi-path polarization interleaved optical signal to obtain a multiplexed optically-carried millimeter wave; and sequentially performing optical branching on the multiple optical sideband signals and then recombining them to obtain the first optical sideband signal and the second optical sideband signal, including: Inputting the communication optical sideband signal and the perception optical sideband signal into a first multi-channel optical filter for branching, and inputting the first local oscillator optical sideband signal and the second local oscillator optical sideband signal into a second multi-channel optical filter for branching; combining the sensed optical sideband signal and the second local oscillator optical sideband signal by a second optical coupler to obtain the first optical sideband signal; The communication optical sideband signal and the first local oscillator optical sideband signal are combined by a third optical coupler to obtain the second optical sideband signal.

2. The optical millimeter wave sensing fusion communication method according to claim 1 is characterized in that: The step of performing polarization interleaving on the first optical sideband signal and the second optical sideband signal to obtain the polarization interleaved optical signal comprises: Inputting the first optical sideband signal into a first polarization controller to perform polarization state alignment to obtain the first optical sideband signal after polarization state alignment; Inputting the second optical sideband signal into a second polarization controller and then performing polarization state alignment to obtain the second optical sideband signal after polarization state alignment; The polarization beam combiner performs polarization interleaving on the first optical sideband signal and the second optical sideband signal after polarization state alignment, and outputs the polarization interleaved optical signal.

3. The optical millimeter wave sensing fusion communication method according to claim 1, characterized in that: The power compensation of the polarization interleaved optical signal is performed to divide the compensated polarization interleaved optical signal into multiple polarization interleaved optical signals, including: Inputting the polarization-interleaved optical signal into an erbium-doped optical fiber amplifier for power compensation to obtain the compensated polarization-interleaved optical signal; The compensated polarization-interleaved optical signal is distributed into multiple optical resources by an optical splitter to obtain the multiple polarization-interleaved optical signals.

4. The method for optical millimeter wave sensing fusion communication according to claim 1, characterized in that: The method of performing branching, filtering, photoelectric conversion and power amplification on a single polarization interleaved optical signal among the multiple polarization interleaved optical signals to obtain a multiplexed optically-carried millimeter wave comprises: Splitting the single-path polarization-interleaved optical signal into a first polarization-interleaved optical signal and a second polarization-interleaved optical signal by a fourth optical coupler; Performing optical bandpass filtering on the first polarization-interleaved optical signal and the second polarization-interleaved optical signal respectively to obtain a plurality of polarization-interleaved optical signals; Performing photoelectric conversion and power amplification on the multiple polarization-interleaved optical signals to obtain multiple millimeter waves; The multiple millimeter waves are radiated to a user end through different antennas, so that the user end obtains the multiplexed optically-carried millimeter waves.

5. The optical millimeter wave sensing fusion communication method according to claim 4 is characterized in that: The performing optical bandpass filtering on the first polarization interleaved optical signal and the second polarization interleaved optical signal respectively to obtain a plurality of polarization interleaved optical signals comprises: Inputting the first polarization-interleaved optical signal into a first optical bandpass filter, filtering the first local oscillation optical sideband signal, and obtaining a perceived polarization-interleaved optical signal; The second polarization-interleaved optical signal is input into a second optical bandpass filter to filter the second local oscillation optical sideband signal to obtain a communication polarization-interleaved optical signal.

6. The optical millimeter wave sensing fusion communication method according to claim 5 is characterized in that: The performing photoelectric conversion and power amplification on the multiple polarization interleaved optical signals to obtain multiple millimeter waves includes: The first photodetector performs photoelectric conversion on the sensed polarization interleaved optical signal, and amplifies the signal through a first power amplifier to obtain a sensed millimeter wave; The communication polarization interleaved optical signal is photoelectrically converted by a second photodetector and amplified by a second power amplifier to obtain a communication millimeter wave.

7. The optical millimeter wave sensing fusion communication method according to claim 6 is characterized in that: The step of radiating the multiple millimeter waves to a user terminal through different antennas so that the user terminal obtains the multiplexed optically-carried millimeter waves includes: The sensing millimeter wave is radiated to the user end through the first antenna, and the communication millimeter wave is radiated to the user end through the second antenna; The user end receives the multiplexed optically-carried millimeter wave composed of the sensing millimeter wave and the communication millimeter wave through a fourth antenna.

8. The optical millimeter wave sensing fusion communication method according to claim 7 is characterized in that: The method further comprises: performing branching, filtering, photoelectric conversion and power amplification on a single polarization interleaved optical signal in the multiple polarization interleaved optical signals to obtain a multiplexed optical millimeter wave, and using the multiplexed optical millimeter wave to communicate with a user end, and then comprising: The third antenna receives the perceived reflected echo of the user terminal, performs signal processing on the perceived reflected echo, and obtains the user terminal location information.

9. An optical millimeter wave sensing fusion communication system, characterized in that: include: A central unit, a distributed unit and at least one remote unit, wherein the central unit is sequentially connected to the distributed unit and the at least one remote unit via a single-mode optical fiber, wherein: The central unit is used to split and modulate the optical carrier to obtain multiple optical sideband signals; optically split the multiple optical sideband signals in sequence and then recombine them to obtain a first optical sideband signal and a second optical sideband signal; polarization interleave the first optical sideband signal and the second optical sideband signal to obtain a polarization interleaved optical signal; The distributed unit is used to perform power compensation on the polarization-interleaved optical signal and distribute and output multiple polarization-interleaved optical signals; The at least one remote unit is used to convert one polarization-interleaved optical signal among the multiple polarization-interleaved optical signals into a multiplexed optical-carrier millimeter wave for sensing communication with a user end; The central unit comprises a laser, a synaesthesia sideband generator, a two-tone local oscillator generator and a first optical coupler, wherein: The laser is used to output an optical carrier; The first optical coupler is used to split the optical carrier into a first optical signal and a second optical signal; The synaesthesia sideband generator is used to generate a communication optical sideband signal and a perception optical sideband signal after performing asymmetric single sideband modulation on the first optical signal; The dual-tone local oscillator generator is used to generate a first local oscillator optical sideband signal and a second local oscillator optical sideband signal from the second optical signal; The central unit further comprises a second optical coupler, a third optical coupler, a first multi-channel optical filter and a second multi-channel optical filter, wherein: The first multi-channel optical filter comprises a first upper output port and a first lower output port, and the first multi-channel optical filter is used to output the communication optical sideband signal and the perception optical sideband signal to the third optical coupler through the first upper output port, and output the perception optical sideband signal to the second optical coupler through the first lower output port after splitting the communication optical sideband signal and the perception optical sideband signal; The second multi-channel optical filter comprises a second upper output port and a second lower output port, and the second multi-channel optical filter is used for outputting the first local oscillation optical sideband signal to the third optical coupler through the second upper output port and outputting the second local oscillation optical sideband signal to the second optical coupler through the second lower output port after splitting the first local oscillation optical sideband signal and the second local oscillation optical sideband signal; The second optical coupler is used to combine the perceived optical sideband signal and the second local oscillator optical sideband signal to output the first optical sideband signal; The third optical coupler is used to combine the communication optical sideband signal and the first local oscillator optical sideband signal to output the second optical sideband signal.

10. The optical millimeter wave sensing fusion communication system according to claim 9, characterized in that: The central unit further includes a first polarization controller, a second polarization controller and a polarization beam combiner, wherein: The first polarization controller is used to align the polarization state of the first optical sideband signal and then input it into the first input port of the polarization beam combiner; The second polarization controller is used to align the polarization state of the second optical sideband signal and then input it into the second input port of the polarization beam combiner; The polarization beam combiner is used to perform polarization interleaving on the first optical sideband signal and the second optical sideband signal after the polarization states are aligned to obtain the polarization interleaved optical signal.

11. The optical millimeter wave sensing fusion communication system according to claim 9, characterized in that: The distributed unit includes an erbium-doped fiber amplifier and an optical splitter, wherein: The erbium-doped fiber amplifier is used to perform power compensation on the polarization-interleaved optical signal to obtain a compensated polarization-interleaved optical signal; The optical splitter is used to distribute the compensated polarization-interleaved optical signal to multiple optical resources to obtain the multiple polarization-interleaved optical signals.

12. The optical millimeter wave sensing fusion communication system according to claim 9, characterized in that: A single remote unit of the at least one remote unit comprises a fourth optical coupler, a first optical bandpass filter, and a second optical bandpass filter, wherein: The fourth optical coupler is used to split the single-path polarization-interleaved optical signal into a first polarization-interleaved optical signal and a second polarization-interleaved optical signal; The first optical bandpass filter is used to receive the first polarization-interleaved optical signal, filter the first local oscillation optical sideband signal in the first polarization-interleaved optical signal, and obtain a perceived polarization-interleaved optical signal; The second optical bandpass filter is used to receive the second polarization-interleaved optical signal, filter the second local oscillation optical sideband signal in the second polarization-interleaved optical signal, and obtain a communication polarization-interleaved optical signal.

13. The optical millimeter wave sensing fusion communication system according to claim 12, characterized in that: The single remote unit further comprises a first photodetector, a second photodetector, a first power amplifier, a second power amplifier, a first antenna, and a second antenna, wherein: The first photodetector is used to perform photoelectric conversion on the perceived polarization interleaved optical signal to obtain a perceived polarization interleaved electrical signal; The second photodetector is used to perform photoelectric conversion on the communication polarization interleaved optical signal to obtain a communication polarization interleaved electrical signal; The first power amplifier is used to amplify the power of the perceived polarization interleaved electrical signal to obtain a perceived millimeter wave; The second power amplifier is used to amplify the power of the communication polarization interleaved electrical signal to obtain a communication millimeter wave; The first antenna is used to radiate the sensing millimeter wave to the fourth antenna of the user end; The second antenna is used to radiate the communication millimeter wave to the fourth antenna of the user end, so that the user end processes the communication millimeter wave and obtains downlink communication information.

14. The optical millimeter wave sensing fusion communication system according to claim 13, characterized in that: The single remote unit also includes a third antenna, and the third antenna is used to receive the perceived reflected echo of the user end, perform signal processing on the perceived reflected echo, and obtain the user end location information.

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