15 results about "Space division multiplexing" patented technology

A kind of distributed multi-parameter sensing system based on multi-core optical fiber, including laser, laser light source is sent to the signal generator input trigger pulse drive respectively with the signal input end of phase-sensitive optical time domain reflectometer based on Rayleigh scattering and its demodulation device, Raman optical time domain reflectometer based on Raman scattering and its demodulation device, Brillouin optical time domain reflectometer based on Brillouin scattering and its demodulation device are connected, the signal output end of phase-sensitive optical time domain reflectometer and its demodulation device, Raman optical time domain reflectometer and its demodulation device, Brillouin optical time domain reflectometer and its demodulation device is connected with the signal input end of multi-core optical fiber through multi-core optical fiber fan-in fan-out module;The present application utilizes the principle of space division multiplexing, each fiber core in optical cable as separate sensing channel carries out measurement and signal transmission;Multi-core optical fiber fuses three kinds of distributed optical fiber sensing systems together, realizes in-situ measurement and mutual compensation decoupling of temperature, strain and vibration, improves the measurement precision of sensing system.

The application discloses a kind of based on neural network master-slave architecture's space division multiplexing transmission optical signal demodulation method, comprising:1. Adopt time window input to capture inter-symbol time correlation, construct Transformer encoder architecture, through multi-head self-attention global modeling mode-to-mode crosstalk and time dependence, fusion multimodal physical parameter feature;2. Select reference mode to train basic network, use transfer learning to quickly adapt other space division multiplexing mode, reduce training data amount;3. Structured pruning is carried out to each mode Transformer network, according to the importance of attention head and neuron, remove redundant structure, realize lightweight deployment;4. According to bit MSE allocation demodulation mode, the bit with good training effect uses lightweight network, and the rest uses Log-MAP algorithm;According to channel quality dynamic adjustment network depth and the number of attention heads in real-time demodulation, balance complexity and performance.The application can improve demodulation performance, reduce data demand, enhance channel adaptability, realize high-performance low-power real-time demodulation.

The present application provides a communication method and an apparatus, which are used for preventing mismatches between transmitter precoding and receivers from affecting the space division multiplexing performance of communication systems. The method comprises: sending a first reference signal by means of a first reference signal port, and sending a second reference signal by means of a second reference signal port; receiving first indication information, the first indication information indicating that a first reference signal port group to which the first reference signal port belongs corresponds to a first demodulation reference signal (DMRS) port group; and receiving a DMRS by means of at least one DMRS port comprised in the first DMRS port group.

A method for MMW wireless communications, comprising the steps of: at a central office, with a QD MWL source, generating at least one optical signal comprising a plurality of different frequency signals; splitting the at least one optical signal into at least one first split signal and at least one second split signal; modulating the at least one first split signal with at least one wireless data signal and generating at least one downlink optical data signal, wherein the at least one frequency signal of the first split optical signal of the QD-MWL is used as an optical local oscillator (LO) for synthesizing RF MMW wireless signals remotely by mixing with the at least one downlink optical data signal; and the at least second split signal of the QD-MWL is used as an optical LO for the receiving uplink wireless signals at the central office.

The application provides a control system, method, device and storage medium for medical implant devices, the system comprising: an extracorporeal acoustic holograph phased array and at least one implant device to be controlled wirelessly connected with the extracorporeal acoustic holograph phased array, wherein the extracorporeal acoustic holograph phased array is used to construct a special acoustic field, emit ultrasonic waves to the implant device, adjust different types of implant devices located at different positions, locate and track the position of the implant device in a moving state, perform space division multiplexing, and realize synchronous control of wireless power supply, wireless operation and wireless communication of the implant device at different positions; the implant device is used to receive the ultrasonic control signal, set a corresponding form of ultrasonic wireless signal, supply power to the device, control the trigger of the device, and execute the derived function of the device. The application has the characteristic of "space division multiplexing", can simultaneously operate the devices at different positions, and can realize different operation functions at different positions.

This invention provides a method and apparatus for compressing and encrypting snapshots of multiple 3D color objects based on spatial division multiplexing. The method includes: generating an object beam and a reference beam based on a three-primary-color laser source, and generating multiple composite three-color parallel beams based on the object beam; illuminating each 3D color object and a random phase mask connected to each 3D color object with the multiple composite three-color parallel beams, respectively, and calculating the light field distribution of each 3D color object on the corresponding random phase mask plane; encrypting the light field distribution using each random phase mask, and generating an object light field on a detector plane based on the encrypted light field distribution; and generating an encrypted color hologram of multiple 3D color objects by interfering with the reference beam on the detector plane through the object light field and the reference beam. This method can significantly reduce the crosstalk effect during decoding of different encrypted objects, greatly reduce the leakage of object information, and significantly improve security.

The application discloses a semi-dynamic scheduling method based on time-varying frequency hopping. For DL SPS and UL CG services, a base station introduces a semi-dynamic scheduling mechanism, taking a Hopping Pattern four-tuple model as the core, to jointly control time domain, frequency domain, space domain and MCS. The base station predicts CSI, beams and QoS based on an AI / ML module, autonomously decides whether to update the Hopping Pattern, and can classify UEs with weak channel correlation into the same multicast group for unified distribution, to realize space division multiplexing and free hopping of intra-group UEs in a frequency domain resource pool. The Hopping Pattern is carried by a semi-dynamic scheduling SDS dedicated MAC CE, a bitmap is used to indicate the hopping dimension on demand, and the semi-dynamic scheduling overhead is reduced. After receiving the SDS dedicated MAC CE, a UE performs multi-dimensional resource hopping from a specified period, and uses the latest valid Hopping Pattern before receiving a new indication.

The application relates to an energy data processing method and device, computer equipment, a storage medium and a computer program product. The method comprises the following steps: obtaining original energy data based on space division multiplexing transmission energy data; sequentially performing denoising processing and data quality evaluation processing on the original energy data to obtain denoised energy data and a quality evaluation result of the denoised energy data; performing denoising processing on the denoised energy data again according to the quality evaluation result to obtain target energy data; and inputting the target energy data into a trained energy scheduling processing model to obtain target scheduling information of the target energy data. The method can improve the energy data processing efficiency, utilize the target scheduling information to improve the scheduling effect of energy equipment, and realize intelligent management of the energy equipment.

The application provides a space terahertz communication network link establishment method based on multi-beam scanning, which comprises the following steps: single handshake synchronization initiated by the receiving party, adaptive multi-beam sector scanning, waiting time calculation, space division multiplexing strategy, and parallel scanning and sector allocation. The single handshake synchronization mechanism reduces the round-trip propagation delay, the adaptive multi-beam sector scanning technology improves the scanning efficiency, and the space division multiplexing strategy realizes the parallel scanning of multiple beams, so that the rapid link establishment in the space terahertz communication network is realized. The method has the advantages of rapidity, high efficiency and strong adaptability, and is suitable for the high-speed dynamic change scene of the space terahertz communication network, and provides a new solution for the development of space communication technology.

The application discloses a kind of for multicore optical fiber coupling Multi-wavelength PCSEL array manufacturing method, belong to semiconductor photoelectric technology field, by first wafer direct bonding, realize the hetero-integration of Ⅲ-V PN junction gain structure and silicon-based photonic crystal resonator, avoid the air hole morphology deterioration problem caused by traditional secondary epitaxial growth;Through second metal bonding, realize the efficient heat dissipation integration of laser array and metal heat sink;Device design is carried out using transfer matrix method combined with three-dimensional coupling wave theory, while ensuring calculation accuracy, reduce simulation resource consumption;By adjusting the center distance of double circular air holes in the same square lattice unit of photonic crystal, the wavelength of each laser unit is accurately controlled.The PCSEL array prepared by the application is spatially arranged corresponding to the core layer of multicore optical fiber, and the output fundamental mode Gaussian spot is matched with the multicore optical fiber, which can be directly and efficiently coupled, and is suitable for large-capacity, low-cost wavelength-division and space-division multiplexing optical communication system.

The application provides a multi-core optical fiber and a butt joint method thereof, relates to the technical field of optical fibers, and aims to solve the technical problem of crosstalk between an identification layer and its adjacent fiber cores during optical fiber communication. The multi-core optical fiber comprises a cladding, an identification structure and a plurality of fiber cores; the plurality of fiber cores are uniformly arranged in the cladding, and the cross section of the cladding is circular; the cladding is provided with an identification hole, the identification hole is arranged in parallel with the fiber cores, and the identification hole penetrates through the entire cladding along the extension direction of the cladding; the identification structure is arranged in the identification hole, and the identification structure is arranged in offset with the symmetry axes of any two fiber cores and the central axis of the cladding; the identification structure comprises an identification layer arranged on the inner wall of the identification hole, and the identification layer surrounds a hollow; the identification layer is configured to form a refractive index difference with the cladding, and can absorb light introduced therein. The multi-core optical fiber provided by the application is one of space division multiplexing technical means, and is suitable for optical communication.

An optical signal amplification apparatus includes a power detection module, a pump control module, and a Raman amplification module. The power detection module is configured to detect power of each of a plurality of G wavelength channels in each of a plurality of N spatial dimensions, and send power configuration information to the pump control module. The pump control module is configured to output N channels of pump light, where each channel of pump light includes M pieces of split pump light of different wavelengths, and a proportion of each piece of split pump light in pump light of a corresponding wavelength is determined based on the power configuration information. The Raman amplification module is configured to perform Raman amplification on a space division multiplexed signal in all of the N spatial dimensions by using the N channels of pump light.

The application relates to a constellation geometry shaping system and method for few-mode fiber space division multiplexing, and belongs to the technical field of optical fiber communication and digital signal processing. The system and method are based on a module designed in the system. Firstly, system parameter configuration, initial constellation construction and mode-dependent loss parameter setting are completed in the system initialization layer, and a transmission signal is generated. Then, the signal enters a few-mode fiber microchannel based on a step-by-step Fourier method to complete a signal transmission process. A full-micro digital signal processing link is established at the receiving end to process the signal. In the training track, a joint loss function is constructed based on a multi-mode generalized mutual information, and optimization is carried out in combination with a weighting mechanism. Through automatic differentiation, constellation parameter iterative updating is realized. In the verification track, the channel condition is fixed, the constellation performance is evaluated, and the optimal constellation result is selected. The application can reconfigurably realize mode-dependent loss-resistant geometry shaping of a constellation diagram without changing the existing optical communication transceiver structure.

This invention relates to the field of optical communication technology, and particularly to a multi-plane optical conversion system. The system includes a total internal reflection prism and an optical fiber assembly. The total internal reflection prism includes a first and a second parallel reflecting surface, with a phase modulation layer disposed on the first reflecting surface. The optical fiber assembly includes a first fiber component and a second fiber component. A fundamental mode beam is incident on the total internal reflection prism along the first fiber component, passes through the phase modulation layer at least once, and undergoes total internal reflection on the first reflecting surface, converting into a higher-order mode beam. By using the total internal reflection prism, the first reflecting surface can achieve reflection without additional reflective coating, and the single-reflection efficiency is higher than that of a coated multi-plane optical conversion system, effectively reducing the manufacturing cost of the multi-plane optical conversion system while avoiding significant optical power loss after multiple reflections. This invention also provides a space-division multiplexing system, which includes the aforementioned multi-plane optical conversion system.

Wavelength division multiplexers for space division multiplexing can include wavelength division multiplexing fanout devices or pump-signal combiners for multicore fibers. The disclosure can include wavelength division multiplexers for space division multiplexing (SDM-WDM devices), including wavelength division multiplexing fanout devices and pump-signal combiners for MCFs. The disclosure can include space division multiplexers (SDMs), including adapters between MCFs with different core patterns and / or add-drop multiplexers for MCFs.