973 results about "High transmission" patented technology

The invention provides a wireless sensing platform with an edge computing function, and relates to the technical field of wireless sensors. In order to solve the problems that in the prior art, a wireless sensor is large in data redundancy, high in transmission delay and weak in emergency recognition and response capacity in a complex scene, a joint processing mechanism combining a causal event recognition assembly, a causal data fusion assembly, an event separation assembly and a data distribution assembly is adopted. By detecting a causal change event in an environment and dynamically extracting and fusing sensor data with a strong causal relationship, redundant data transmission caused by emergencies is reduced, transmission delay is reduced, the robustness of causal data fusion in a concurrent event scene is improved, and the reliability of data fusion is improved. According to the invention, efficient and accurate sensing and response to emergencies in a complex environment are realized.

The invention provides a dynamic adaptive encryption protocol selection mechanism. The mechanism comprises a network condition monitoring module, a data sensitivity evaluation module, an encryption protocol dynamic selection module and a performance feedback adjustment module. Indexes such as network bandwidth and delay are monitored in real time, and the network condition is evaluated; evaluating a sensitivity level of the data to be transmitted; dynamically selecting the most suitable encryption protocol from the encryption protocol library according to the network condition and the data sensitivity; encrypting and transmitting data by using the selected encryption protocol; and monitoring the transmission performance, and adjusting an encryption protocol selection strategy according to feedback. The method can automatically judge network and data conditions, dynamically select an encryption protocol, optimize network performance and resource utilization efficiency on the premise of ensuring data security, improve transmission efficiency and reduce calculation overhead, and has the advantages of automation, security, performance optimization, efficient resource utilization and the like; the method is suitable for the field of network communication with high requirements for safety and performance.

The invention provides an all-dielectric film system structure with visible near-infrared low transmission vegetation simulation, intermediate infrared high reflection and microwave high transmission. The device sequentially comprises, from top to bottom, a visible near-infrared simulated vegetation layer which is composed of first to fourth dielectric layers and is configured to simulate vegetation reflection spectrum characteristics in a wave band of 380-2500 nm and has a low transmission characteristic; the intermediate infrared high-reflection layer is formed by alternately stacking a first dielectric layer and a third dielectric layer, and is configured to form high reflection in a wave band of 3-14 microns; and a substrate layer; the thickness of the whole film layer is far smaller than the microwave wavelength, so that the film system keeps high transmission in the microwave band. According to the invention, the amorphous InSb material with high loss characteristic in visible near-infrared light is introduced, so that the average transmissivity of 1500-2500 nm is reduced to 0.095 while high-precision simulation of the vegetation reflectivity spectrum is realized, thereby realizing simulation of low transmissivity of the wave band vegetation.

The invention provides an efficient transmission algorithm for HPLC carrier communication data, which belongs to the technical field of carrier communication, and comprises the following steps of: step 1, double-link separation processing: respectively processing frame control data and load data by adopting two separated links; 2, a frame control data processing flow: carrying out improved Turbo coding on the frame control data; step 3, a load data processing flow: firstly, carrying out adaptive scrambling on load data, and adopting Turbo coding with different parameter configuration from frame control data; step 4, OFDM symbol generation and transmission: adopting an optimized fast algorithm to reduce the operand and the processing time; and step 5, receiving end processing flow: respectively adjusting frame control and load data by adopting AGC (Automatic Gain Control) and time synchronization. The algorithm is high in anti-interference capability, remarkably reduces the bit error rate, is high in transmission efficiency, can adapt to different power line channel environments and data transmission requirements, and has good universality and stability.

The invention discloses a lightweight transmission and loading optimization method for cloud rendering of a high-precision three-dimensional model, belongs to the technical field of network transmission, and aims to solve the problems of large data volume, high transmission delay and slow loading of cloud rendering of the high-precision three-dimensional model. Carrying out importance evaluation on the rendering primitives, constructing a feature matrix and a weight vector, and determining important data points through matrix multiplication; important data points are subjected to lightweight coding and preferential transmission, and non-important data points are subjected to high-strength compression or delayed transmission. At the client side, client importance re-evaluation is carried out on received rendering data blocks, a client feature matrix and a weight vector are constructed, high-priority loading data are determined through matrix multiplication, and decoding, loading and rendering are preferentially carried out. According to the invention, lightweight transmission and rapid loading of the high-precision three-dimensional model are realized, and the user experience and the resource utilization efficiency are remarkably improved.

The invention discloses a communication network bandwidth control method, and particularly relates to the technical field of network bandwidth control. Flow monitoring equipment is arranged in a communication network, flow is monitored in real time, flow data of different users and applications are collected, and on the basis of historical flow data and a real-time change trend, a burst flow prediction model is constructed, and flow peak fluctuation and sudden increase characteristics are analyzed, so that the real-time response capability of a bandwidth allocation strategy is evaluated in advance, and the real-time response capability of the bandwidth allocation strategy is evaluated in advance. When the response capability is insufficient, bandwidth allocation is dynamically adjusted according to a priority strategy, bandwidth requirements of high-transmission-priority applications are preferentially guaranteed, bandwidth occupation of low-priority applications is limited so as to ensure the continuity of key services, and after bandwidth adjustment, the allocation strategy is further refined through real-time flow feedback, so that the bandwidth allocation efficiency is improved. The efficient utilization of resources and the stability of network service quality are guaranteed, so that the problem of bandwidth allocation lag in emergencies is solved, and flexible resource optimization management is realized.

The invention relates to a flash evaporation material with a high transmission-reflection ratio, which is characterized in that the raw material of the flash evaporation material comprises polyethylene; the Frazier air permeability of the flash evaporation material is 0.45-0.85 m < 3 > / (min.m < 2 >); the transflective ratio of the flash evaporation material is 2-7m < 3 > / (min.m < 2 >. Mm), and the transflective ratio is equal to (Frazier air permeability. Reflectivity) / thickness. Through comprehensive regulation and control and balance of four groups of core parameters including the solvent ratio, the spinning parameters, the web forming speed and the hot rolling process, part of performance pain points in the prior art are solved, and the design requirement for the proper transflective ratio is met.

User equipment may include a transmitter coupled to an antenna to enable the user equipment to transmit data with a communication node and / or a non-terrestrial network. The user equipment may transmit using high power over a period of time such that the transmission power of the user equipment is below an emission threshold. For example, the user equipment may adjust a buffer status report to reduce uplink allocation frequency. In another example, the user equipment may determine a duty cycle and transmit the data using high power based on the duty cycle. In another example, the user equipment may determine a priority of uplink symbols and transmit certain uplink symbols using high power. In this way, the user equipment may transmit using high power and may improve transmission range to the non-terrestrial network and / or a likelihood that transmissions may be received by the network while remaining within the emission threshold.

The invention discloses a low-delay lossless digital audio transmission method, a low-delay lossless digital audio transmission system and a storage medium, which relate to the technical field of digital audio transmission and are used for monitoring network environment data in real time and dynamically adjusting audio transmission parameters according to changes of network bandwidth Bw, network delay Dr, packet loss rate Pd and network jitter Wd. Comprising an audio transmission rate Rsv, a data packet size Spd and a redundancy coding ratio Rbf. The adaptive adjustment can ensure that the data transmission quantity is reduced and the packet loss probability is reduced when the network condition is poor, and meanwhile, the transmission efficiency is improved and the audio quality is optimized when the bandwidth condition is good. Compared with a traditional fixed transmission parameter method, lossless audio transmission can be achieved under different network conditions, and meanwhile unnecessary delay is reduced. According to the invention, intelligent compression of the audio data is realized, the data volume is reduced under the condition that the bandwidth is limited, the network burden is reduced, and the stability and integrity of audio transmission in a low-bandwidth environment are ensured.

The invention relates to the technical field of cables, in particular to an ultrahigh-frequency low-loss longitudinal-hole PTFE insulated coaxial cable which comprises a composite conductive bar, a silver-plated copper flat belt, a PTFE insulating layer, a corrugated aluminum belt shielding layer and a sheath layer which are sequentially connected in a sleeved mode from inside to outside. Four identical longitudinal holes are formed in the PTFE insulating layer, and each longitudinal hole penetrates through the PTFE insulating layer along the extension direction of the PTFE insulating layer; each longitudinal hole is in a crescent shape; the longitudinal holes are distributed at equal intervals in the circumferential direction of the PTFE insulating layer; and each longitudinal hole is formed in the edge area, close to the outer ring, of the PTFE insulating layer. According to the cable, the transmission efficiency is improved by reducing signal attenuation, the service life is prolonged by improving the temperature resistance level, the inner conductor and the outer conductor are structurally adjusted to ensure that the cable has certain flexibility, and energy conservation and environmental protection are achieved by reducing the use amount of rare metal.

The invention discloses a high-transmission-rate optical cable with a low attenuation characteristic and a preparation method thereof, belongs to the technical field of optical cable communication, and is used for solving the technical problem that the transmission performance and the mechanical performance of an optical cable in the prior art need to be further improved. According to the optical cable, the polytetrafluoroethylene is filled with the modified graphene and the molybdenum disulfide, so that the mechanical property and the environmental adaptability of the optical cable are effectively improved, and the transmission speed of the optical cable is also effectively improved.

The invention discloses a lithium battery high-speed circulating lifter which comprises lifting frames, a corridor, conveyors, synchronous belt wheel sets, a bracket and a deflector rod, the lifting frames are erected in pairs, the corridor is erected at the top ends of the lifting frames, the conveyors opposite in direction are arranged on the corridor in a layered mode, and the two synchronous belt wheel sets driven by a gear motor are longitudinally arranged in each lifting frame. A plurality of brackets distributed at equal intervals are hung on the synchronous belt wheel sets, and the synchronous belt wheel sets are connected with the conveyors in a one-to-one correspondence mode through shifting rods. By means of the mode, according to the high-speed circulating elevator for the lithium batteries, the continuously-distributed brackets are hung on the synchronous belt wheel set, so that a plurality of lithium battery trays are loaded in the single lifting stroke, and loading and releasing of materials are completed before the upper end and the lower end of the synchronous belt wheel set are overturned and steered; therefore, high-span rapid transmission of the lithium batteries is achieved, seamless connection of production lines is achieved, and meanwhile the transmission efficiency is greatly improved.

A wireless device may communicate with a base station by using overlapping transmissions. Information such as a channel state information (CSI) report may be multiplexed in a repetition of a transmission such as a physical uplink shared channel (PUSCH) transmission. A rule may be applied to indicate / determine which repetition, of a plurality of repetitions, comprises the multiplexed information. The rule may comprise including the multiplexed information in a transmission associated with at least one of: a lowest (or highest) frequency or range of frequencies, a lowest (or highest) starting (or ending) resource block, a lowest (or highest) transmission configuration indicator (TCI) state, a lowest (or highest) TCI state index, a lowest (or highest) panel or panel index, and / or any other parameter / indicator that may differentiate a transmission (including the multiplexed information) from other transmission(s).

According to the precise displacement platform, due to the fact that the objective table is placed on the wedge-shaped table, and the length direction of the hinge shaft is in the second horizontal direction, the objective table slides on the wedge-shaped table when the linear driving mechanism drives the adjusting assembly to horizontally move in the first horizontal direction, and therefore the lifting function is achieved, due to the fact that the wedge-shaped table is hinged to the adjusting assembly through the hinge shaft, the inclination of the wedge-shaped table relative to the adjusting assembly can be changed, switching between a high transmission speed mode and a high precision mode can be achieved according to the inclination, and the high transmission speed mode and the high precision mode can be achieved through the device. The precise displacement platform is simpler in structure and convenient to operate.

There is provided an adjustable dumbbell including a dumbbell body, dumbbell plates, and a dumbbell base for placing the dumbbell body and dumbbell plates. The dumbbell implements transmission in a mode of meshing internal gear rings with gear sets and meshing the gear sets with teeth on telescopic sleeves, such that a high transmission efficiency is achieved, a torque of a handle can be more efficiently converted and transmitted to the telescopic sleeves, the telescopic sleeves can make a faster response, and a weight adjustment speed of the dumbbell is increased. A structure used in the transmission mode has greater load-bearing capacity, has higher wear resistance than a structure in a nut and lead screw mode, and there will be no situation where the dumbbell cannot be used due to thread wear after long-term use.

The invention discloses a micro-robot joint driving mechanism and a multi-joint micro-robot, and relates to the technical field of micro-robots. According to the joint driving mechanism, through the axial integrated arrangement of the shell, the brushless outer rotor motor, the multi-stage meshing transmission assembly, the power output connecting piece and the circuit board and the integrated design of a stator of the brushless outer rotor motor and the circuit board, a compact micro structure is achieved; and a closed-loop position detection system formed by a magnetic encoder and a magnetic ring is matched, so that high torque output and high transmission efficiency are realized under the condition of miniaturized volume, and meanwhile, part redundancy is reduced so as to reduce the cost. The mechanism solves the problem that miniaturization, high torque and low cost are difficult to consider in the prior art, and can be widely applied to miniature multi-joint robots.

The present disclosure relates to the technical field of communications, and provides a leaky-wave antenna and an antenna system. The leaky-wave antenna comprises: a first dielectric substrate, a first metal layer, a dielectric functional layer, a second metal layer, and a second dielectric substrate. The first metal layer comprises a first transmission line and first radiation units; multiple first notches distributed at intervals are provided on a side edge, parallel to a length direction, on a first plasmon section of the first transmission line; and the multiple first radiation units and the first notches are located on the same side of the first transmission line. In the embodiments of the present disclosure, on the basis of the first plasmon section comprised in the first transmission line, the confinement capability of electromagnetic signals can be enhanced, and the radiation of the electromagnetic signals can be reduced, thereby ensuring the transmission efficiency of the electromagnetic signals, and achieving compact design of leaky-wave antennas. In addition, by radiating antenna signals outward from the first radiation units, high gain of the antenna signals can be ensured while maintaining high transmission efficiency in the first transmission line.

The invention relates to a closed type double-point multi-connecting-rod servo press which comprises a press body, a transmission box, a lead screw, a lower bearing, a lower supporting sleeve, a nut and a driving sliding block. A servo motor is arranged at the upper end of the transmission box; the upper end of the screw rod is connected with the servo motor through a cylindrical pin; an upper lubricating end cover is arranged at the upper end of the driving sliding block, a lower lubricating end cover is arranged at the lower end of the driving sliding block, sealing felt is arranged at the upper end of the upper lubricating end cover, and the driving sliding block, the upper lubricating end cover and the sealing felt are matched to form an upper lubricating cavity. The lower lubricating end cover is connected with a telescopic sleeve arranged on the bottom plate, the driving sliding block, the lower lubricating end cover, the telescopic sleeve and the bottom plate are matched to form a lower lubricating cavity, a circulating oil way is arranged between the upper lubricating cavity and the lower lubricating cavity, lubricating oil in the lower lubricating cavity is conveyed into the upper lubricating cavity through the circulating oil way, and the circulating oil way passes through the lower bearing and is communicated with the lower lubricating cavity. Lubricating oil in the circulating oil way lubricates the lower bearing. The invention has the advantages of reasonable structural design, closed lubrication, good lubrication effect, high transmission precision and the like.

The embodiment of the invention discloses a data transmission method, which comprises the steps of determining first data from to-be-sent data and sending the first data to second equipment based on a first data volume of the to-be-sent data and a first transmission parameter of a transmission channel between the first equipment and the second equipment, and then determining the first data from the to-be-sent data and sending the first data to the second equipment based on the first transmission parameter and a target size of a target cache region, the method comprises the following steps: processing to-be-processed data except first data to obtain processed data, storing the processed data in a target cache region, then determining a transmission priority of the to-be-transmitted data based on a target parameter representing a category of the to-be-transmitted data, and sending the to-be-transmitted data to a second device based on a first transmission parameter and the transmission priority, the problem of relatively high transmission delay in the transmission process of the video frame in the prior art is solved. The embodiment of the invention further discloses a data transmission device and equipment, a computer storage medium and a computer program product.

The invention relates to a hollow-core anti-resonance optical fiber based on a runway type nested structure and a design method, belongs to the technical field of optical fibers, and solves the problems of high transmission loss, limited bandwidth and high manufacturing difficulty of an anti-resonance optical fiber in the prior art. The invention provides a hollow-core anti-resonance optical fiber based on a runway type nested structure, which is of a cylindrical structure and sequentially comprises a fiber core (1) located in the center, an optical fiber layer (2) located in the center and an optical fiber layer (3) located in the center from inside to outside in the radial direction, the micro-structure cladding (2) surrounds the fiber core (1) and comprises a plurality of groups of paired cladding tubes (21) and runway type nested tubes (22), the plurality of groups of paired cladding tubes (21) and runway type nested tubes (22) are uniformly arranged around the fiber core (1), and consistent gaps are formed between adjacent cladding tubes (21); and the cylindrical outer cladding (3) surrounds the microstructure cladding (2).

According to the near memory DMA asynchronous controller, the data transmission method of the AI computing system, the medium and the product, a buffer does not need to be configured, the area of the near memory DMA asynchronous controller is reduced, the data carrying path is shortened, and the power consumption overhead in the data carrying process is reduced. Bus bit width address alignment is carried out in the near memory DMA asynchronous controller and then transmission is carried out, so that the utilization rate of the bus bandwidth is improved, and the current requirements of the AI chip are adapted with low logic overhead, low power consumption and high transmission efficiency; the asynchronous control mode can enable the calculation process and the data transmission process of the AI chip in the operation of the network model to be higher in parallel degree and higher in coupling degree.

Systems and methods are disclosed for phase calibration between clock and data lanes at a data link receiver. In calibration mode, matching signals are transmitted over the clock and data lanes, and a phase offset is measured at the receiver. A phase shifter in one signal path is adjusted to a first phase to obtain a desired phase offset. For operation mode, the phase shifter is set based on the first phase. Embodiments measure phase offset using an XOR gate and use a phase interpolator as the phase shifter. Embodiments with multiple data lanes apply coarse calibration to a shared clock lane relative to a first data lane, and similar fine calibration to other data lanes. Calibration provides optimum signal-to-noise ratio or timing margin, enabling high transmission speeds at relatively low power. Variations are disclosed.

The invention relates to a broadband bending-resistant multimode optical fiber and a preparation method thereof, the refractive index profile of a core layer is in a gradually-changed parabola shape, the distribution index alpha is 1.95-2.65, the radius R1 of the core layer is 12-35 microns, the delta 1max is 0.9%-1.4%, the relative refractive index difference delta 1min at the R1 position of the edge of the core layer is-0.16%--0.06%, cladding layers comprise an inner cladding layer, a first sunken cladding layer, a second sunken cladding layer and an outer cladding layer from inside to outside in sequence, the inner cladding layer is sequentially provided with a first inner cladding layer and a second inner cladding layer from inside to outside, the single-side width (R4-R3) of the first sunken cladding layer is 1.5-9.0 [mu] m, delta 4 is-1.1%--0.60%, the single-side width (R5-R4) of the second sunken cladding layer is 1.0-3.0 [mu] m, delta 5 is-1.0%--0.55%, the radius R6 of the outer cladding layer is 60-65 [mu] m, and delta 6 is-0.12-0.12%. The core cladding is reasonable in structural design, has the excellent characteristics of high bandwidth, strong bending resistance and low attenuation, and is high in transmission efficiency and excellent in long-term stability and reliability.

The invention provides a hollow-core anti-resonance optical fiber and application and a manufacturing method thereof. The hollow-core anti-resonance optical fiber comprises a supporting tube; the multiple first cladding tubes are attached to the inner surface of the supporting tube at intervals in the circumferential direction of the supporting tube, and the first cladding tubes are configured to be of an anti-resonance structure; the middle plate is arranged in the supporting pipe and is configured to be of a resonant structure or an anti-resonant structure; wherein the middle plate and the plurality of first cladding tubes divide the internal space of the supporting tube into two basically symmetrical air fiber core areas. When the intermediate plate is configured to be of a resonant structure, the hollow-core anti-resonant optical fiber can support an LP11 transmission mode and has the characteristic of low limiting loss; when the intermediate plate is configured as an anti-resonance structure, the hollow-core anti-resonance optical fiber can support x polarization odd mode, x polarization even mode, y polarization odd mode and y polarization even mode transmission modes, has the characteristic of high transmission capacity, and can be applied to a polarization beam splitter.

The present disclosure relates to a CAN controller module. The CAN controller module is configured to detect transmission errors during transmissions of bits of a CAN frame via a CAN but and to handle these transmission errors robustly such that a high transmission rate is possible even if the transmission errors occur. The present disclosure also relates to a method for the CAN controller module.

The invention relates to a large-size wide-spectrum infrared color separation film with controllable surface precision and a manufacturing method thereof, the color separation film takes a silicon plain film as a substrate, a color separation film is designed on a light incident surface of the silicon substrate, germanium and zinc sulfide are used as high and low refractive index materials of a reflecting film stack, ytterbium fluoride is added in a matching layer, the film thickness ratio is regulated and controlled, and a thin film deposition process is optimized. The surface type change caused by the film layer is reduced; a thickness compensation film layer is added when the antireflection film is designed on the light transmission surface of the silicon substrate, so that the stress of the antireflection film and the stress of the color separation film are mutually counteracted, and the surface type is controlled. Appropriate substrate temperature, deposition rate and local film layer ion auxiliary deposition are adopted in the preparation of the color separation film, and the environmental reliability is good. The prepared large-size color separation sheet is controllable in surface type, the surface type precision RMS of the color separation surface is 0.028 lambda, the surface type precision RMS of the anti-reflection surface is 0.042 lambda, the large-size color separation sheet can highly reflect a broadband of 2-3.95 microns and highly transmit a broadband of 4.2-5.1 microns, and the large-size color separation sheet can be used for spectrum color separation of a large-view-field infrared optical system.

A side throwing type fertilizer distributor belongs to the technical field of fertilizer distributors and comprises a vehicle body, a throwing assembly, wheels, an upper spiral shaft, a lower spiral shaft, a rear flange, a swing frame, a gate, a connecting rod, a push-pull plate, an oil cylinder, a material throwing wheel, a lower large chain wheel, a lower small chain wheel, a driving wheel, an input shaft, an upper chain wheel, an upper large transmission wheel, an upper small transmission wheel, a lower large transmission wheel, a lower small transmission wheel, an upper transmission shaft and a lower transmission shaft. The wheels are connected to the swing frame, the swing frame is hinged to the lower end of the vehicle body, the gate is arranged in the rail groove, the connecting rod is hinged to the gate and the push-and-pull plate, the push-and-pull plate is hinged to the vehicle body, the oil cylinder is hinged to the push-and-pull plate and the vehicle body, the scattering assembly is arranged at the discharging port, and the upper spiral shaft and the lower spiral shaft are connected into the vehicle body through a bearing and a rear flange. The input shaft is arranged on the front lower portion of a transmission box of the vehicle body, and all rotating components are in transmission in the transmission box through chain wheels and chains. The vehicle body is good in sealing performance and high in transmission efficiency, and fertilizer can be thrown to the side of the vehicle body.

The invention discloses an intelligent design method for a dual-frequency wide-angle high-transmission metasurface, which comprises the following steps of: performing layered sampling on geometric structure parameters of a metasurface unit, performing equal-interval sampling on incident angles, performing full-wave electromagnetic simulation on a parameter sample group to obtain transmission electromagnetic response data, and constructing a database; a multi-layer perceptron neural network is used for learning a nonlinear mapping relation among geometric structure parameters, incident angles, frequencies and transmission coefficient amplitude values, and an independent test sample is used for evaluating the prediction precision and generalization ability of the trained multi-layer perceptron neural network under wide angles and dual frequency bands. A substitution model is constructed based on the trained multi-layer perceptron neural network, the substitution model is embedded into a global optimization process, structural parameters are iteratively optimized in combination with a heuristic search algorithm, an optimal design meeting a dual-band high-transmittance index is obtained, the precision and efficiency of metasurface design are remarkably improved, and the performance of the metasurface design is improved. While the wide-angle double-frequency high transmission performance is ensured, the design period is greatly shortened.

Waveguides and waveguide displays having a layer for blocking non-image light (i.e. haze) that could otherwise reduce contrast and degrade color gamut and uniformity, while providing high transmission to external light are provided. Many waveguides and displays incorporate at least one light control layer applied to at least one external surface of said waveguide and overlapping at least a portion of said at least one grating, to divert or block scattered light from said set of gratings that might otherwise enter said eyebox.

The embodiment of the present application provides a laser communication modulation method and system thereof, which can solve the technical problem of poor sensitivity of free-space laser communication under extremely low signal-to-noise ratio conditions. The method includes performing polarization-selective modulation on a coding sequence to obtain multiple groups of linearly polarized light pulses. Each group of linearly polarized light pulses is sent to different photon detectors through different channels to obtain a first photon count and a second photon count. According to the first photon count and the second photon count of all groups of linearly polarized light pulses, a log-likelihood ratio is obtained through soft decision. Then, the original information prediction value is obtained through channel decoding. In this way, polarization-selective pulse position modulation and its corresponding demodulation method can obtain better communication sensitivity and stronger resistance to background noise compared to PPM‑PC. In addition, optical signals in different polarization states carry different data respectively, and are then transmitted in sequence, with a high transmission rate.