2075results about "Electromagnetic transmission optical aspects" patented technology

The invention discloses a three-dimensional signal secure transmission method and device based on index modulation. The method comprises the following steps: generating four-dimensional chaotic sequences X, Y, Z and U from a key initial value through a chaotic model; performing XOR operation on the original data by using an encrypted sequence generated by X and U in the four-dimensional chaotic sequence to obtain encrypted data; performing binary conversion on the key initial value to obtain a binary key initial value consisting of N four bits; dividing the encrypted data into N groups, each group having 15 subcarriers, determining a to-be-inserted silent position of each group of subcarriers according to a binary key initial value, performing three-dimensional mapping after the silent subcarriers are inserted, and setting the silent subcarriers at an original point position to obtain a three-dimensional constellation diagram; performing constellation masking on the three-dimensional constellation diagram by using Y and Z in the four-dimensional chaos sequence; carrying out IFFT (Inverse Fast Fourier Transform) on the three-dimensional constellation diagram after constellation masking, adding a suffix, and carrying out parallel-serial conversion to obtain transmission data; and transmitting the transmission data to a receiving end through an optical fiber channel.

The invention provides a cross-medium remote control communication method, device and equipment and a storage medium, which are applied to a cross-medium remote control system comprising a transmitting end and a receiving end. The method comprises the following steps that: a transmitting end responds to a key operation of a user, generates a key signal, codes the key signal, and generates a modulation electric signal containing a synchronous head signal and an instruction frequency signal; environment parameter information is collected, dynamic parameter adjustment is carried out on the modulation electric signal according to the environment parameter information, and the adjusted modulation electric signal is converted into a modulation light signal through an LED; a receiving end receives the cross-medium transmission optical signal, carries out amplification and digital processing, and extracts frequency characteristic information through spectrum analysis; and analyzing a control instruction according to the frequency characteristic information and executing corresponding equipment control operation. Through the specific time-frequency signal structure design and the multi-stage signal processing technology, the stability problem of water-air interface signal transmission is effectively solved, and low-delay and high-success-rate cross-medium remote control communication is achieved.

The invention belongs to the technical field of optical wireless communication and deep reinforcement learning, and discloses a water-air cross-medium laser communication beam alignment method based on deep reinforcement learning, which comprises the following steps of: analyzing four parts of emission, propagation loss, cross-interface and receiving, and establishing a mathematical model of a water-air cross-medium laser channel; establishing a deep reinforcement learning model based on the water-air cross-medium laser channel model in S1; based on a deep reinforcement learning model, training an intelligent agent to achieve a beam alignment scheme with the strongest channel gain; and based on the beam alignment scheme with the strongest channel gain, completing the test of the intelligent agent. According to the water-air cross-medium laser communication beam alignment method based on deep reinforcement learning, channel change caused by factors such as sea waves is predicted through reinforcement learning, beam alignment is realized to maintain channel gain, and the problem of stability of a wireless optical channel in a special cross-medium communication environment is solved.

The invention discloses a multi-mode optical signal transmission method and device, electronic equipment and a storage medium, and relates to the technical field of computers.The transmitted data stream is divided into a control signal and a data signal, the control signal is a visible light wave band, the data signal is an infrared wave band, and the control signal and the data signal are combined to a single multi-core optical fiber through a combiner; the optical network controller allocates subcarrier resources as required according to the change of network flow in a spectrum dynamic allocation mode to perform data transmission, so that the subcarrier resource allocation adapted to the change of network flow improves the dynamic adaptability, and the allocation of the subcarrier resources as required improves the equipment cooperation efficiency, and in the data transmission process, the data transmission efficiency is improved. Clock synchronization and signal encryption are realized through a quantum key distribution mode, and the security is improved.

A communication apparatus for performing underwater visible light communication with a target communication apparatus includes a visible light communicator that transmits and receives a visible light signal including communication data, a sound wave communicator that receives a sound wave signal including information used to control establishment of visible light communication connection, the sound wave signal having been transmitted from the target communication apparatus or another communication apparatus, and a controller that performs control to establish the visible light communication connection with the target communication apparatus, based on the information included in the received sound wave signal.

The invention discloses an optical fiber communication power supply control method and an optical fiber communication power supply control system, and relates to the technical field of power control and power supply. The problems of high power supply interruption risk, insufficient energy consumption management, lack of real-time fault early warning and the like are solved; using a distributed sensor to collect node voltage related data and load current related data, calculating a path stability index Lwd and evaluating, dividing a power supply interruption risk level, and starting a standby power supply or isolating a high risk node when a high risk is detected; a load balance coefficient Lhp is calculated through the load distribution regulation and control module, the power transmission proportion is dynamically adjusted, and energy utilization is optimized; and meanwhile, a fault coupling influence factor Efi is calculated and dynamically evaluated through a fault early warning analysis module, and finally, the stability and reliability of the optical fiber communication power supply system are effectively improved by adjusting a power distribution strategy and a standby power supply mode.

Provided is a device, including: an analog optical interconnect; an input array coupled to the analog optical interconnect; and an analog or mixed signal processor or a memory array coupled to the input array via the analog optical interconnect.

Techniques for powering a multi-unit optical network terminal (MU-ONT) located outside of a multi-unit building include obtaining reverse power from Power-over-Ethernet (PoE) lines connecting the MU-ONT to terminal units (TUs) or customer premises equipments (CPEs) disposed inside the building. Reverse power may be injected into the PoE lines at the TUs, for example. Via an MU-ONT reverse powering device, the reverse power may be separated from services data provided via the PoE lines, and the services data may be delivered between the TUs and a Passive Optical Network (PON) via the MU-ONT. The reverse power obtained from the PoE lines may be aggregated to provide the MU-ONT with power commensurate with its power load. In some embodiments, the MU-ONT power load may be shared or distributed across PoE lines in a passive or actively controlled manner based on variations in the MU-ONT load and / or respective characteristics of the PoE lines.

A fiber sensing control device (FSCD) is provided for protecting a network infrastructure in an optical fiber network against intrusive fiber sensing. The FSCD resides on an optical fiber cable at a boundary between the first network segment containing the network infrastructure that is to be protected and a neighboring network segment. The FSCD comprises at least one blocking element that can block sensing of backscattered light on at least one optical fiber of the optical fiber cable.

The invention provides a downlink data transmission method, device and system for laser fiber power supply application, and the method comprises the steps: carrying out the differential coding of downlink data to be transmitted through a transmitting end, and obtaining a data bit sequence; mapping the data bit sequence into a modulation symbol sequence by adopting a single-carrier phase modulation mode; performing digital-to-analog conversion on the modulation symbol sequence to obtain an analog signal; and outputting downlink energy and downlink data through an energy optical fiber according to the analog signal. According to the invention, the signal frequency spectrum is moved to be far away from the direct current frequency through differential coding and single carrier phase modulation, so that the interference of direct current laser energy on signal detection is minimized, the signal-to-noise ratio is improved, the inter-symbol interference is reduced, and a receiving end is ensured to have enough signal-to-noise ratio to reliably detect data.

The present disclosure relates to a quantum communication system. Particularly, the present disclosure relates to a device and a method for performing two-step quantum secure direct communication (QSDC) with a reduced complexity without measuring a quantum memory and a bell state of a receiver in a quantum communication system.

The invention belongs to the technical field of electric power and communication engineering, and particularly relates to an intelligent line patrol instrument based on multi-band electromagnetic induction and TDR fusion, and the intelligent line patrol instrument comprises a signal transmitting end which comprises a main control unit, a multi-band electromagnetic signal generator, a TDR pulse module and a self-adaptive coupling circuit. And the signal receiving end comprises a three-axis magnetic field sensor, an ADC module, an FPGA processing unit, a DSP processing unit and a touch display screen. The invention relates to an intelligent line patrol instrument combining multi-band electromagnetic induction and time domain reflection (TDR) technologies, which is used for path tracking, depth measurement and high-precision fault positioning of underground cables and optical cables, and is particularly suitable for underground pipeline maintenance and construction scenes under complex electromagnetic environments (such as transformer substations and dense pipeline areas).

The invention discloses an independent double-single-side-band direct detection system based on geometric shaping and digital chaotic encryption, and belongs to the field of terahertz communication. According to the detection system, an external cavity laser ECL of a sending end generates continuous optical carriers, the continuous optical carriers are input into an I / Q modulator, a TX-DSP module generates two independent vector radio frequency signals of GS-QPSK and GS-NQAM through geometric shaping and a three-dimensional multi-vortex chaos system technology, the I / Q modulator is driven to modulate the input optical carriers, and the optical carriers are transmitted to a receiver. After being amplified, the terahertz signals are input into a one-way carrier photoelectric detector for frequency beating to obtain independent double-sideband terahertz signals, the independent double-sideband terahertz signals are input into a frequency mixer of a receiving end for frequency mixing with generated local oscillation signals, down-conversion of the signals is achieved, and fundamental frequency signals are obtained; and then the data are input to an RX-DSP module, normalization, down-sampling, signal separation, de-mapping, symbol-level and bit-level decryption and other operations are carried out, and finally two paths of original data are obtained to solve the bit error rate. According to the invention, the system communication capacity is improved, and the security of independent double-sideband signal transmission is improved.

The invention relates to a laser wireless energy and signal synchronous transmission system, in particular to a laser wireless energy and signal synchronous transmission system for a rotary motion mechanism, which is used for solving the defect that the existing SLWPIT technology still has more limitations in the application of a rotary mechanism although the existing SLWPIT technology meets the requirement of long-distance transmission to a certain extent. The laser wireless energy and signal synchronous transmission system for the rotary motion mechanism comprises a stator part and a rotor part, and considers that an all-optical link realizes laser wireless energy and signal synchronous transmission in a rotary state from the system level, so that stable energy transmission efficiency can be kept in the rotary state; the system has good anti-electromagnetic interference capability and strong environmental adaptability.

The invention discloses a quantum noise stream signal transmission method and device based on odd-order constellation forming in the technical field of optical transmission communication. The method comprises the following steps: generating four-dimensional chaotic sequences X, Y, Z and W by utilizing a 4D hyperchaotic model according to an initial key; performing serial-to-parallel conversion and up-sampling on the initial key, introducing error bits into a key matrix by utilizing W, and dividing the key matrix into a first state basis matrix and a second state basis matrix; performing specificity comparison or processing on the original data by using the X to obtain first data; dividing the first data into a data matrix and an index bit matrix, and performing joint index modulation to obtain a 9QAM signal; scrambling a subcarrier and a symbol point of the 9QAM signal by using the Y and the Z to obtain a 9QAM scrambled signal; and performing quasi-quantum noise stream encryption processing on the 9QAM scrambling signal by using the first state basis matrix and the second state basis matrix to obtain a 576QAM encrypted signal, performing OFDM modulation, and transmitting the 576QAM encrypted signal in an optical fiber channel.

One embodiment provides a computer system. The computer system includes a plurality of processing units, a plurality of memory channels, and an arrayed waveguide grating router (AWGR). A respective processing unit is coupled to an array of tunable optical transceivers. A respective memory channel is coupled to a plurality of memory banks. Each memory bank is associated with a unique optical wavelength and can be accessed via the corresponding wavelength. Each memory channel is coupled to an individual output port of the AWGR, and the tunable optical transceivers of each processing unit are respectively coupled to different input ports of the AWGR, thereby allowing each processing unit to communicate with any memory bank associated with any memory channel using an appropriate tunable optical transceiver tuned to the corresponding optical wavelength associated with the memory bank.

The invention discloses a noise suppression parameter self-adjusting optical fiber optical frequency transfer relay system, which comprises multiple stages of relay stations which are cascaded in sequence, each stage of relay station comprises a receiving end, an optical amplification end and a transmitting end which are connected in sequence, and the transmitting end of the previous stage of relay station is connected to the receiving end of the next stage of relay station, the receiving end is used for receiving an optical frequency signal from an upper-level relay station; the optical amplification end is used for carrying out coherent amplification on a received optical frequency signal, and the sending end is used for transmitting the optical frequency signal after coherent amplification to a next-stage relay station and measuring and eliminating additional phase noise in a signal transmission link. According to the optical fiber optical frequency transfer relay system, self-adjustment of noise suppression parameters can be effectively achieved, and therefore effective suppression of additional phase noise is achieved.

The invention discloses a transmit-receive isolation device and a laser communication transmit-receive isolation system, and relates to the technical field of inter-satellite laser communication, the transmit-receive isolation device comprises a transmit-receive module, a communication detection module, a filtering module, a detection module and a control module, the transmit-receive module is used for receiving remote light and outputting the remote light as a remote light signal; the communication detection module is used for receiving a remote optical signal; the filtering module is connected between the communication detection module and the transceiving module, the filtering wavelength of the filtering module can be adjusted, and the filtering module is used for selectively transmitting optical signals with specific wavelengths; the detection module is used for detecting the wavelength of the remote optical signal; the control module is respectively connected with the filtering module and the detection module; the control module is used for controlling the filtering wavelength of the filtering module to be equal to the wavelength of the remote optical signal according to the detection result of the detection module, so that the filtering module selectively filters the remote optical signal; according to the technical scheme, the compatibility of the laser communication transceiving isolation system can be improved.

The invention provides a highway cloud toll collection system data transmission method, and relates to the technical field of data transmission. The highway cloud toll collection system data transmission method specifically comprises the following steps: S1, data acquisition; s2, data preprocessing; s3, transmitting visible light communication data; s4, road side unit data receiving and processing; s5, encrypting the data and transmitting the data to an edge computing node; s6, edge computing node data processing; s7, uploading the data to a cloud platform; and S8, carrying out deep analysis on the cloud platform data. The invention provides an expressway cloud toll collection system data transmission method which has the advantages of efficient data transmission, high safety, high reliability, intelligent data processing, high expansibility, cost effectiveness and the like. The overall performance and the user experience of the highway toll collection system can be obviously improved.

The invention relates to the technical field of power system safety monitoring, in particular to a power transmission line online safety monitoring method, system and device based on quantum communication and a storage medium. The multi-modal fusion sensor synchronously collects multi-parameter electric signal data such as current, voltage and temperature of the power transmission line, and performs quantum encryption instantaneous recording on the data; based on quantum encryption instantaneous record extraction data, a deep learning adaptive Kalman filtering algorithm is combined with a neural network to predict the operation state of the power transmission line; generating a new Manchester code according to the multi-parameter electric signal data and the operation state predicted value, and encrypting by adopting quantum key distribution to generate a ciphertext; and transmitting the ciphertext to a client based on a terahertz communication channel, decrypting and recovering the data through the quantum key, and carrying out safety early warning. Theoretically uncracked data security assurance is realized by using the unclonable characteristic of the quantum state, high-rate data transmission is realized by terahertz communication, and the transformation from passive monitoring to active early warning is realized by a prediction algorithm.

The invention discloses an on-chip optical interconnection and switching chip and an application system thereof. Wherein the on-chip optical interconnection and exchange chip is integrated by a power divider, a bidirectional optical transceiver unit and an optical switch unit; the application system of the on-chip optical interconnection and switching chip comprises a multi-wavelength light source used for generating multi-wavelength optical carrier signals, a transceiving unit control and clock module used for bidirectional transceiving unit feedback / amplifier control and clock synchronization, and an optical switching control module used for switching an optical switching unit switching link. The chips and the modules are used for realizing optical interconnection and optical switching of the special electrical computing chip ASIC. According to the invention, bidirectional optical interconnection and exchange of special computing electric chips such as a CPU, a GPU, a DPU and the like can be realized by utilizing an on-chip optical interconnection and exchange technology, the interconnection rate is high, the exchange switching time is short, computing power cluster networking oriented to artificial intelligence application can be supported, and the application prospect is good.

The invention discloses a light flux-inductance-energy integrated system, which comprises a flux-inductance signal generating device for generating flux-inductance integrated digital signals, and is characterized in that the output of the flux-inductance signal generating device is connected with a digital-to-analog converter so as to convert the flux-inductance integrated digital signals into analog electric signals; an analog electric signal output by the digital-to-analog converter is connected with the transmitter through the driving circuit, and the analog electric signal is converted into an optical signal through the transmitter; an optical signal output by the emitter generates two light beams through the spectroscope; one light beam is connected with an information decoding module and a sensing processing module; and the other light beam is connected with the energy collection module for energy collection. The optical flux and inductance integrated system provided by the invention is simple to implement and easy to integrate with existing facilities, and can provide integrated gains such as shared hardware resources and reduced mutual interference.

The present disclosure relates to a quantum communication system, and specifically to a method and a device for the method, wherein the method comprises the steps of: acquiring configuration information about a quantum signal used for quantum communication; receiving, through a quantum channel, a first block sequence which includes a plurality of first single photons that correspond to the quantum signal, and generating a plurality of second single photons on the basis of the configuration information; inputting, to a beam splitter (BS), the first and second single photons which correspond to each other; and determining whether there is an error in the quantum channel on the basis of the number of detection paths of photons output from the beam splitter.

The invention discloses a hierarchical coordinate flipping coding method, device and system based on constellation joint shaping, and the method comprises the steps: carrying out the probability shaping of an original pseudo-random binary sequence, and generating a binary sequence with non-uniform probability distribution; performing serial-parallel conversion on the binary sequence with non-uniform probability distribution, and mapping the binary sequence to a pre-generated three-dimensional constellation; the method comprises the following steps: generating four different chaotic sequences by using a secret key and a four-dimensional multiphase hyperchaotic system, encrypting subcarriers and symbols by using two of the chaotic sequences, combining the other two of the chaotic sequences into a new chaotic sequence, and performing coordinate flipping on constellation points on a three-dimensional constellation by using the new chaotic sequence to obtain a three-dimensional constellation. And completing constellation point encryption. According to the invention, the security of the communication system can be ensured, and the damage to the transmission performance can be effectively reduced.

A solution is disclosed for providing fault-managed power systems using hybrid connectivity that includes both conductive and optical elements. The fault-managed power systems are able to provide safe and efficient power delivery utilizing optical fiber links to improve signal integrity, security, and reach of the system.

The invention belongs to the technical field of wireless optical communication, and discloses a cross-domain relay type radio frequency-laser communication module and a communication method, and the cross-domain relay type radio frequency-laser communication module is provided with a node construction module, a relay module, a synchronous control module, a modulation-demodulation module and a situation awareness module. According to the invention, a large-scale MIMO technology, DMD structure light modulation and AWI signal modulation and demodulation technology are utilized to autonomously design a large-bandwidth and high-secrecy radio-light transmission conversion module; a high-precision synchronous control module is designed by using a GD32 chip, and low-delay and low-error-code relay type cross-domain information interconnection is ensured. Meanwhile, a high-sensitivity area array CCD detector is combined to sense the position of a light spot, an underwater speckle recognition alignment algorithm is developed based on YoLoV8, azimuth information is output to assist semi-active alignment, and then low-cost, low-time-delay, high-speed, long-distance and large-capacity all-weather cross-domain communication in complex water areas is achieved.

A distributed data processing system includes a first data processing system and a second data processing system. The first data processing system includes a first housing, a first data processor, and a first optical module that is configured to convert output electrical signals from the first data processor to output optical signals that are provided to a first optical fiber cable. The second data processing system includes a second housing, a second data processor, and a second optical module that is configured to convert output electrical signals from the second data processor to output optical signals that are provided to a second optical fiber cable. An optical power supply includes at least one laser that is configured to provide a first light source to the first optical module through a first optical link and to provide a second light source to the second optical module through a second optical link.

The invention relates to an underwater laser communication device and method, in particular to an underwater large-range searching and tracking duplex laser communication device and method, and solves the technical problem that rapid orientation and establishment of an optical communication link between underwater random motion platforms are difficult. The two-dimensional turntable is matched with the photoelectric detector and the image detector to respectively perform primary large-range scanning and secondary fine tracking scanning, so that a large scanning range is ensured, the method has the characteristics of high speed and high precision, and aiming at an underwater non-cooperative target scene, an uncertain area can be quickly reduced, initial pointing can be completed, and the accuracy of the underwater non-cooperative target scene is improved. The underwater random motion platform is found and captured, an optical communication link can be quickly established, meanwhile, the communication distance and the communication rate are effectively improved, the overall layout of equipment is compact and miniaturized, and engineering application is easy.

Provided is a high-speed optical transmission-reception apparatus including a digital-signal processing circuit and optical modulation and optical reception modules, in which a flexible printed circuit is used as a high-frequency interface for the optical modulation and optical reception modules, a mechanism for connecting the high-frequency line pattern to the flexible printed circuit is provided on a package substrate of the digital-signal processing circuit, and the package substrate and the optical modulation and optical reception modules are connected by the flexible printed circuit.