186 results about "Modulation demodulation" patented technology

The invention relates to a laser automatic frequency locking control system and method based on cold atom feedback and a matched spectrum, the system comprises a laser module, a spectrum module, a photoelectric detector, a modulation-demodulation module, a digital PID controller and a data acquisition and operation platform, and the output end of the laser is connected with the spectrum module; the detection light output by the spectrum module enters the modulation-demodulation module after passing through the photoelectric detector; an output signal of the modulation-demodulation module enters a digital PID controller, and the digital PID controller is connected with a laser for frequency scanning control and is in two-way communication with a data acquisition and operation platform through a data interface; the data acquisition and operation platform comprises a cross-correlation algorithm processing module, a frequency control logic module, a cold atom feedback processing module and an abnormity management module, and is used for calculating, feeding back, controlling and monitoring the system operation state in real time and completing the automatic frequency locking process. According to the invention, the accuracy of frequency locking point identification and the frequency locking efficiency are improved; and automatic relocking can be achieved, and long-term stable frequency locking operation is guaranteed.

The invention relates to the field of mining laser gas detection, in particular to a modulation and demodulation method and system for carrier noise suppression, and the modulation and demodulation method comprises the following steps: S1, generating a driving current sequence through a laser gas sensor; s2, collecting a light intensity sequence to carry out data reconstruction; s3, extracting a harmonic signal, sending the reconstructed sequence into a lock-in amplifier, and respectively extracting a second harmonic signal and a first harmonic signal; and S4, detecting the gas concentration through the ratio by using the mapping relation between the gas concentration and the ratio of the second harmonic signal to the first harmonic signal. According to the method, a continuous data discrete reconstruction technology is introduced into a modulation and demodulation process, and a reference time sequence is generated by utilizing the characteristics of a laser output signal, so that self-matching and dynamic adjustment of modulation frequency are realized, external signal interference is effectively avoided, and the harmonic extraction stability is improved; meanwhile, the hardware structure is simplified, and the adaptability of the system to different gas absorption spectral lines is enhanced.

The invention discloses a gas leakage detection imaging device and method based on a single photon detection technology, and belongs to the technical field of gas detection and imaging. Aiming at the limitation problems of the existing gas leakage detection technology in the aspects of sensitivity, response speed, space imaging capability and anti-interference capability, nanosecond modulation control and synchronous photon counting are realized by utilizing an FPGA (Field Programmable Gate Array) through a visual gas detection imaging device combining an SPAD (Single Program Amplifier) array detector and a WMS modulation-demodulation mechanism; and the second harmonic of the absorption signal is further extracted by combining digital phase-locked amplification, so that gas leakage three-dimensional imaging with high spatial resolution, ppb-level sensitivity, strong background suppression capability and high time response is realized. The system has the advantages of high detection sensitivity, real-time imaging capability with high spatial resolution, high background light interference resistance and high signal-to-noise ratio, the demodulation method is novel, and the modular design has multi-gas compatibility and system expansibility.

A spatial adaptive multi-user service modulation and demodulation method suitable for various channel environments is characterized in that an uplink channel is configured with multiple paths of general carriers and multiple paths of helicopter special carriers in a frequency division mode, and the general carriers support uplink adaptive information transmission of terminals of various types and sizes in an MF-TDMA (Multimedia Frequency-Time Division Multiple Access) system; the on-satellite demodulator obtains a modulation coding mode of a burst data segment by identifying mode word information in a physical layer frame header, and demodulates a corresponding mode; the carrier special for the helicopter uses a continuous carrier mode, and multi-rate channel error correction coding and decoding under rotor wing shielding are supported in a channel interleaving mode. Downlink transmission is carried out in a fixed time slot and free time slot time division mode, and downlink information transmission for universal multi-type terminals and helicopter terminals can be supported at the same time. Compared with a common spatial modulation and demodulation method, the modulation and demodulation scheme provided by the invention can support adaptive transmission of general services of multiple types of terminals and helicopter service information on both an uplink and a downlink by using one satellite-borne modem.

The invention provides a power converter and a control circuit and method thereof, and the method comprises the steps: carrying out the modulation processing of the obtained switching frequency information and / or current reference information at a secondary side of the power converter, generating a reference pulse signal, and transmitting the pulse signal to a primary side through a digital isolator, therefore, a primary side control signal can be obtained after corresponding demodulation processing is carried out on the reference pulse signal on the primary side, and control over the on-off state of a primary side power tube is achieved. According to the scheme of the invention, through special modulation and demodulation setting, various kinds of information can be transmitted between the secondary side and the primary side only through a single channel, the use number of isolation devices between the primary side and the secondary side is reduced, the system structure is simplified, and the system cost is reduced.

The invention discloses a dynamic reconfigurable signal processing platform based on a ZYNQ architecture, and belongs to the technical field of digital signal processing, and the dynamic reconfigurable signal processing platform comprises a channel preprocessing unit, a high-speed AD sampling unit, a ZYNQ-PL logic unit and a ZYNQ-PS algorithm processing unit. A radio frequency signal is fed in from an antenna end and then enters the channel preprocessing unit, a balun circuit and a filter bank are adopted to carry out preselection filtering, amplification and conditioning on the radio frequency signal, and the signal is extracted and sent to the high-speed AD sampling unit; the high-speed AD acquisition unit converts a received analog signal into a digital signal and transmits the digital signal to the ZYNQ-PL logic unit, and the ZYNQ-PL logic unit is connected with the ZYNQ-PS algorithm processing unit through an AXI bus; wherein the ZYNQ-PL logic unit is composed of a static region and three dynamic regions, and is mainly used for realizing a logic part of a functional waveform and completing reconstruction and loading of the functional waveform; and the ZYNQ-PS algorithm processing unit completes algorithm processing, realizes modulation and demodulation of a functional waveform and realizes a functional algorithm.

A power and communication transmission arrangement includes an electronic accessory having a first modulator / demodulator. A motor vehicle includes a charging system to provide a power signal to the electronic accessory. At least one electrical conductor carries the power signal from the charging system to the electronic accessory. An infotainment system bi-directionally communicates with the electronic accessory. A second modulator / demodulator modulates the power signal based upon first signals received from the infotainment system to form first modulated power signals such that the first modulator / demodulator demodulates the first modulated power signals to extract the first signals for use in the electronic accessory. The first modulator / demodulator modulates the power signal based upon second signals from the electronic accessory to form second modulated power signals such that the second modulator / demodulator demodulates the second modulated power signals to extract the second signals for use in the infotainment system.

The invention provides a dynamic monitoring system and method for a submarine optical cable array reservoir, which is applied to the technical field of marine geophysical prospecting, and comprises a wet-end subsystem positioned underwater and a dry-end subsystem positioned on a base bank, the dry end subsystem comprises a light source module used for generating an optical signal; the modulation transmitting module is used for modulating the optical signal to obtain modulated pulse light; the underwater wet end subsystem comprises an optical cable transmission module used for transmitting modulation pulse light; the optical fiber four-component node module is used for dynamically and continuously monitoring the reservoir for a long time, and modulating the acquired sound pressure signal and the triaxial vibration signal onto the modulated pulse light in response to the received modulated pulse light to form a return light signal; the dry end subsystem further comprises a modulation-demodulation module used for receiving the return optical signal and demodulating the return optical signal to obtain four-component monitoring data. According to the invention, sound pressure and three-axis vibration response can be integrated on the same node, and passive four-component synchronous acquisition is realized.

The invention provides a commercial satellite-oriented intelligent measurement and control responder and a multi-frequency-band measurement and control method thereof in order to solve the problems that a current measurement and control responder can only support a measurement and control task of a corresponding frequency band, so that frequency band selection flexibility is poor, and flexible measurement and control requirements cannot be met, and belongs to the technical field of spaceflight measurement and control. According to the invention, the architecture of the basic function module, the multi-band radio frequency front-end module and the multi-band measurement and control antenna is adopted, and the basic function module is integrated into a sharing platform with core functions of baseband processing, modulation and demodulation, intermediate frequency conversion and the like, so that an independent complete transceiving channel is prevented from being repeatedly designed for each band. Meanwhile, radio frequency front ends and antennas of multiple frequency bands such as KA, S and X are integrated, and the limitation that a traditional responder can only work in a single frequency band is broken through. An independent S frequency band measurement and control mode, an S + KA frequency band measurement and control mode, an S + X frequency band measurement and control mode and a KA + X frequency band measurement and control mode can be realized. The method is suitable for design of the measurement and control responder in aerospace constellation networking.

The application discloses a kind of time division multiplexing three-axis wide spectrum light source resonant type fiber-optic gyroscope detection systems and methods, belong to gyroscope optical system design field.System is constituted by optical system and signal detection system, and optical system includes a wide spectrum light source, a push-pull Y waveguide, a circulator, three mutually orthogonal transmission type fiber ring resonant cavity, two sections of delay optical fiber and a photoelectric detector;Signal detection system includes modulation and demodulation module, time division decoupling module and low-pass filter module.Three transmission type fiber ring resonant cavities are sequentially connected, and the time of optical signal reaching three fiber ring resonant cavities is different by being set delay optical fiber between adjacent two transmission type fiber ring resonant cavities.The application ingeniously designs three fiber ring resonant cavities to form three-axis integrated structure.In this way, the time difference of three-axis signals is utilized, and multiplexing in time domain can be realized without adding additional devices.

Disclosed is a fiber-wireless hybrid sensor network deployment method based on an annealing algorithm. In the method, a plurality of fiber sensing tips, a plurality of modulation and demodulation nodes, and a wireless gateway construct a fiber-wireless hybrid sensor network architecture. The fiber sensing tips are directly connected to the modulation and demodulation nodes by overhead optical fibers. The modulation and demodulation nodes modulate and demodulate the optical signals in the plurality of fiber sensing tips connected thereto to convert the optical signals collected by the fiber sensing tips into electrical signals, and transmit the processed electrical signals to the wireless gateway by wireless means. The number of enumerated modulation and demodulation nodes is N S Next, the deployment scheme of the modulation and demodulation nodes is optimized to obtain the optimal deployment scheme of the modulation and demodulation nodes by taking the minimum value of the scheme cost function as the target by using the simulated annealing algorithm, and the fiber-wireless hybrid sensor network architecture is deployed.

The invention discloses a no-cable communication system based on a photon integrated phased array, and the system comprises a plurality of symmetrical double-end receiving and transmitting communication systems, a modulation and demodulation module in a local end emits a modulation optical signal, and the modulation optical signal passes through a light transmitting antenna of the local end for multi-beam transmission; the optical receiving antenna at the opposite end receives an optical signal transmitted by the local end; the corresponding optical fiber beam splitter performs energy splitting on the received optical signal, one part of light is used for bidirectional closed-loop tracking control, and the rest of light enters the corresponding modulation and demodulation module; the modulation-demodulation module at the opposite end emits a modulated optical signal, and the modulated optical signal passes through the optical emission antenna at the opposite end to perform multi-beam emission; and the optical receiving antenna of the home terminal receives the optical signal transmitted by the opposite terminal so as to establish a bidirectional full-duplex communication link. According to the invention, rapid and agile beam control and simultaneous multi-beam transceiving are realized, and the application requirements of near-field cableless multi-link parallel communication are met.

The invention relates to the technical field of sensors, and particularly discloses a pre-embedded sensor based on electric field and magnetic field decoupling energy and signal simultaneous transmission and a corresponding energy and signal simultaneous transmission system. The sensor is provided with a secondary side coupler with a specific hierarchical structure, the secondary side coupler comprises a first ferrite layer, a 2 * 2 array metal pole plate layer, a second ferrite layer and a coil layer, the secondary side coupler is matched with a primary side symmetrical coupler, and an independent power transmission and bidirectional signal transmission channel is constructed by utilizing the near-field electromagnetic decoupling characteristic. According to the system, the resonance compensation network and the modulation-demodulation and crosstalk suppression circuit are integrated, so that effective decoupling between energy and signals and between uplink and downlink signals is realized, and the transmission efficiency and the communication reliability are remarkably improved. Experiments show that the system can realize high-efficiency energy transmission and stable bidirectional full-duplex communication, is excellent in performance in large data volume transmission, and provides a high-reliability integrated power supply and data transmission solution for pre-embedded scenes such as concrete structures.

The invention discloses a power transformer fault automatic identification and grade determination method, and relates to the technical field of power system equipment state monitoring and fault diagnosis, and the method comprises the following steps: 1, carrying out the cross-domain fusion of multi-modal signal collection, including sensor type selection and layout, time-space synchronous triggering and signal transmission; 2, constructing a transfer learning framework for cross-field coupling feature mining, wherein the transfer learning framework comprises digital twin model construction, transfer learning algorithm optimization and coupling feature modulation and demodulation; according to the invention, through cross-domain fusion of multi-modal signal acquisition, cross-field coupling information is comprehensively reserved; coupling features are accurately mined based on a digital twin model and transfer learning optimization; the hidden fault recognition accuracy and the grade judgment adaptability are improved through an attention enhancement framework; the limitation of traditional single physical field analysis is broken through on the whole, the cost is reduced, meanwhile, early warning and full-life-cycle accurate management and control of various hidden faults are achieved, and support is provided for power grid safety.

The invention relates to the technical field of oil-gas exploration logging, provides a logging work data real-time transmission system and method based on an embedded structure, and aims to solve the problems that in the prior art, data transmission is insufficient in real-time performance, a logging system is difficult to troubleshoot, and the data transmission efficiency is low. And the technical problem that the ground decoding board only supports cable communication of a single modulation mode is solved. Comprising a downhole instrument used for collecting original logging electric signals; the mode transformer is used for performing impedance matching processing on the original logging electric signal to obtain a preprocessed logging signal; the amplifier module is used for performing method processing on the preprocessed logging signal to obtain an amplified logging signal; the A / D conversion module is used for converting the amplified logging signal into a digital signal from an analog signal to obtain a digital logging signal; the modulation-demodulation module is used for decoding the digital logging signal to obtain a decoded logging signal; and the network communication module is used for uploading the decoded logging signal to logging acquisition software of an upper computer in real time.

The present application relates to the technical field of communications. Disclosed are a communication method and apparatus, a terminal device and a network device. The network device sends first information, the first information being used for indicating modulation enabling information corresponding to data and / or a modulation mode corresponding to the data, the modulation enabling information corresponding to the data being AI-based modulation or non-AI-based modulation, and the modulation mode corresponding to the data being an AI modulation mode or a non-AI modulation mode; and correspondingly, the terminal device receives the first information. Hence, when AI technology is applied to channel, information or signal processing of wireless communication systems, the present application considers the combination of AI and modulation modes. In the combination of AI technology and modulation, the present application uses the first information to implement network indication for enabling or disabling AI-based modulation and / or network indication for AI modulation modes, and then flexibly configures modulation and demodulation of data and / or modulation modes of data on the basis of communication requirements and the like.

This invention discloses a polarization state modulation method based on regular polyhedral constellation points, comprising: selecting the order of polarization modulation and the corresponding regular polyhedral class; dividing the original binary bitstream into a conventional modulation bitstream and a polarization state modulation bitstream, wherein the conventional modulation bitstream is used to generate conventional modulation symbols, and the polarization state modulation bitstream is used for polarization state mapping; obtaining the corresponding polarization state description parameters using the polarization state modulation bitstream and the order of polarization modulation, determining the polarization weighting factor and performing polarization weighted fusion to obtain dual-channel high-dimensional modulation symbols to be transmitted; transmitting the symbols through an orthogonal dual-polarization antenna after preprocessing; performing RF front-end processing on the received horizontal and vertical polarization components of the RF signal at the receiving end to obtain the Jones vector representation of the baseband received signal; recovering the polarization state information by combining the Stokes parameters, and recovering the original binary bitstream by combining the conventional modulation and demodulation results.

The application relates to a low-complexity OCDM modulation and demodulation implementation method based on FPGA, and belongs to the technical field of electronic communication. The DFnT or IDFnT is split into twice rotation factor multiplication, FFT or IFFT transformation, phase and amplitude adjustment steps to realize OCDM modulation and demodulation. The IQ data module is used to input IQ data to be subjected to DFnT or IDFnT transformation; the first rotation factor multiplication module is used to multiply the first rotation factor after phase rotation with the input data; the FFT or IFFT module is used to perform FFT or IFFT transformation on the output result of the first rotation factor multiplication; then, the data is subjected to second rotation factor multiplication; finally, the phase and amplitude are adjusted to complete OCDM modulation or demodulation. The application provides an OCDM modulation and demodulation scheme based on FPGA, and the storage capacity is reduced under the condition of invariable complexity.

The application provides a modulation method and a communication device, the modulation method uses a first constellation including L constellation points, L=2 Qm , positions of the L constellation points are related to a first set, the first set includes M values, M=2 m , m is a positive number less than Q m , the first value to the T1th value in the first set are an arithmetic sequence with a common difference d1, the T1th value to the T2th value in the first set are an arithmetic sequence with a common difference d2, T1 is greater than 1, T2 is greater than T1 and less than or equal to M, d1 and d2 are different and are positive numbers. Through the modulation method, the overall channel capacity can be improved, and the corresponding modulation and demodulation complexity can be reduced.

The invention provides multifunctional multi-channel satellite measurement and control comprehensive test equipment capable of being dynamically loaded. The multifunctional multi-channel satellite measurement and control comprehensive test equipment comprises a multi-channel signal processing hardware subsystem used for modulation, demodulation and high-speed data processing of multi-channel signals; comprising a high-performance control unit and a multi-channel channel and signal processing unit, the dynamically-loadable firmware subsystem is used for dynamically loading firmware and processing signals and comprises a signal processing firmware module and an interface information interaction firmware module; the multi-mode application software subsystem is used for dynamic switching and service logic processing of multiple measurement and control modes; and the state monitoring and health management subsystem is used for monitoring hardware, firmware and software states of the equipment. According to the invention, an intensive design idea is adopted, channel conditioning and data processing are integrated into a 6U transversely-inserted VPX board card by using a high-performance VPX architecture, functions of original four devices are integrated into one device, and the size is reduced by 75%.

Transfer learning (TL)-based systems, methods, and devices are provided for neural network and / or neuromorphic network transmitters / receivers with a set of desired modulation orders. In one aspect, a source system trains a full neural net modulation / demodulation model, from which one or more upper / output layers are removed, and the remaining base layers are transferred into a target system. A set of one or more upper / output layers are generated for the set of desired modulation orders, then transferred into, and trained in, the target system. The target system may store the transferred base layers and the trained set of one or more upper / output layers for the set of desired modulation orders, and use them to modulate / demodulate any transmission having one of the set of desired modulation orders.

The application discloses a kind of triaxial SERF atom magnetometer quadrature double frequency modulation system and method, the system utilizes signal generation module to generate frequency f m The sine quadrature modulation signal of cosine is respectively driven SERF atom magnetometer X and Y axis magnetic field generating coil, and 2nf m Frequency sine signal of driving Z axis coil, through the integral filter of 3 groups of integral period integration, the open-loop magnetic field signal of X axis, Y axis and Z axis magnetic field component is obtained, and through control module, the driving current of three-axis magnetic field coil is controlled to generate compensation magnetic field, so that the open-loop magnetic field signal of X axis, Y axis and Z axis magnetic field component is zero, at this time, the magnetic field intensity of atom chamber is zero, and the compensation current output by control module is the X, Y and Z axis magnetic field intensity signal measured by triaxial SERF atom magnetometer.The system can directly extract triaxial magnetic field calculation signal from a laser signal, and eliminate the cross-coupling effect when triaxial magnetic field is calculated, improve the measurement range and quadrature of SERF atom magnetometer, with very high engineering application value.

The invention discloses an underwater mooring system unmooring device based on wireless simultaneous transmission of energy and information, and the device takes an anchor chain as a power supply lead and a signal carrier, and achieves mechanical connection through a butt joint locking device; and meanwhile, an energy and information simultaneous transmission module (comprising a transmitting / receiving coil and a modulation-demodulation circuit) is embedded in the locking device, and cross-interface energy and information synchronous transmission is completed by utilizing a shared channel. According to the structure, the sealing problem of traditional wet plugging is avoided, the robustness of a system under dynamic loads and complex media is remarkably improved by decoupling mechanical connection and electrical connection, and key technical support is provided for long-term autonomous operation of underwater equipment.

The application discloses an enhanced twisted copper line transmission system and an implementation method thereof, which comprises an FPGA and an analog front end matched with the FPGA, the FPGA is configured to comprise a framing / de-framing unit, which is connected with network equipment at a public network or a local area network end through an interface unit; a digital front end unit connected with the analog front end, used for realizing PAM and CAP modulation and demodulation; a SOC subsystem connected with the framing / de-framing unit and the digital front end unit respectively, used for completing link building and state management; and the SOC subsystem adopts an embedded kernel, and a UART serial port of the embedded kernel is a management channel under SDSL technology and SHDSL technology. The application provides an enhanced twisted copper line transmission system and an implementation method thereof, adopts a channel compatibility and algorithm function module multiplexing method, supports two transmission technologies of SDSL and SHDSL, adopts a spread spectrum method, breaks through the limitation of an ITU-G.991.2 SHDSL standard, makes the highest transmission rate not less than 20480 kbit / s, and meets the application requirements of low-speed long-distance and short-distance high-bandwidth of users.

This invention discloses an in-situ online detection method for the curing process parameters of grout filling material in stone artifacts. A fiber optic temperature sensor, fiber optic strain sensor, and fiber optic humidity sensor are fabricated using fiber Bragg gratings and integrated into a single package to obtain a grout curing process parameter detection device. Multiple of these devices are vertically placed at different heights within the stone artifact's cracks. Each device is connected to a corresponding signal input terminal of a modem. When the grout is injected into the cracks, the modem collects and demodulates the drift data of the center wavelength corresponding to each sensor in each device. The demodulated data is then transmitted to a computer, which calculates the grout curing process parameters at different heights within the cracks.

The invention discloses a high-speed modulation and demodulation method for a dynamic underwater acoustic network, and the method also employs an orthogonal sequence multiplexing modulation and demodulation technology based on a Zadoff-Chu (ZC) sequence, and combines the setting of a cyclic displacement interval to construct a plurality of sub-channels, thereby achieving the multi-path separation, and reducing the average transmitting power of a system at the same time. In the aspect of multi-user access, interference among multiple users is regarded as additive white noise by using quasi-orthogonal characteristics among different ZC root sequences, so that uncoordinated random concurrent access is supported; differential modulation between sub-channels in a symbol is adopted, and the requirement for phase tracking is lowered; and a receiving end converts multipath amplitude information into soft decision information through cyclic correlation spectrum calculation and multipath diversity technologies, so that the calculation complexity is reduced, and the throughput of the time-varying underwater acoustic system is improved while the multi-user access efficiency is improved.

The application discloses a kind of energy collection GFSK modulation and demodulation wireless transceiver, it is characterized in that, including GFSK demodulator, GFSK modulator, power supply management module, internal control module, radio frequency energy collection module;The GFSK demodulator is connected with transceiving antenna by low-noise amplifier, the GFSK modulator is connected with transceiving antenna by radio frequency power amplifier;The internal control module is connected with GFSK demodulator, GFSK modulator, the GFSK demodulator is used to demodulate received wireless signal, the GFSK modulator is used to modulate the wireless signal that emits;Wherein, the radio frequency energy collection module connects power supply management module, the radio frequency energy collection module is converted into electric energy by energy collection antenna and collects radio frequency energy, and the power supply management module is used to manage the electric energy that radio frequency energy collection module exports and is powered for wireless transceiver.

The application discloses a low-orbit satellite communication timing advance estimation method based on an affine frequency division multiplexing waveform. The affine frequency division multiplexing waveform is applied to a preamble modulation and demodulation process of random access, a new preamble structure is proposed, and a corresponding timing advance estimation method is researched. Firstly, the affine frequency division multiplexing modulation eliminates the frequency offset of the preamble sequence. Then, aiming at the demand of low-orbit satellite communication, the length of correlation operation is reduced, and the detection complexity of the preamble is also reduced. In addition, the timing advance estimation method can distinguish the main path peak value, and the estimation accuracy is improved. Finally, in a double selection channel, compared with the existing preamble, the preamble based on the affine frequency division multiplexing designed without frequency offset compensation has obvious performance gain, and higher correct probability of timing advance estimation is realized.

The invention discloses a dual-beam millimeter wave satellite communication phased-array antenna device and a communication system. The device comprises a dual-beam transmitting module, a dual-beam receiving module, a frequency conversion module, a positioning and attitude determining module, an antenna control module and a structural assembly. The system comprises a dual-mode satellite modulation and demodulation module, a baseband processing and routing module and a user terminal interface module. According to the phased-array antenna, an electronic scanning system is adopted, the problem that a traditional mechanical phased-array antenna is low in tracking speed is solved, and the reliability of the phased-array antenna is greatly improved; meanwhile, the dual-beam design is adopted, two satellite networks can be accessed at the same time, real-time switching between the two satellite networks is achieved, uninterrupted satellite communication is achieved, and the communication reliability is greatly improved.