336 results about "Coded modulation" patented technology

The invention discloses an HPLCamp (High Performance Liquid Chromatography) based on deep learning. The invention discloses an HRF dual-mode communication adaptive coding modulation and anti-noise method. The method comprises the following steps: acquiring an optical radio frequency signal amplitude-phase change rate and synchronously sampling and normalizing; calculating a node amplitude-phase residual error to generate a nonlinear mapping coefficient; monitoring coherent change to solve a drift trend, adjusting a modulation coding optimization scheme, compensating distortion and outputting an anti-noise result. According to the method, the instantaneous amplitude and phase of the optical radio frequency dual-mode signal are extracted, a multi-dimensional amplitude-phase characteristic matrix is formed in combination with time domain synchronization and a normalization template, differential residual modeling and nonlinear mapping coefficient calculation are carried out between impedance nodes, and dynamic compensation of amplitude-phase mismatch and envelope offset is achieved. A drift trend quantity is generated based on coherent offset parameter differentiation, feedback is provided for modulation format and coding strategy optimization, amplitude equalization and phase correction are completed, the signal synchronization degree and amplitude-phase consistency are improved, and the steady-state response and anti-disturbance performance of a transmission link are enhanced.

The invention relates to a computing power resource dynamic scheduling method, device and equipment based on deep reinforcement learning and a medium thereof, and the method comprises the steps: constructing a joint state vector through real-time fusion of a network layer channel state and computing layer node load data, and driving a strategy network to generate transmission parameters and resource allocation actions of cooperative control; the code modulation parameters of the wireless transmission module and the computing resource proportion of the target node are synchronously configured in the execution layer, and dynamic task scheduling in the channel decay environment is achieved; a multi-target reward mechanism is designed to couple transmission bit error rate penalty, resource utilization efficiency and task timeliness evaluation indexes, and a reinforcement learning agent is guided to balance communication stability and computing power demand conflicts; according to the method, strategy network parameters are optimized through time difference errors, closed-loop feedback is formed in combination with channel state prediction and node load updating, the problems of network and calculation layer splitting decision, insufficient dynamic adaptability and multi-target optimization imbalance in the prior art are effectively solved, and the task scheduling success rate in the time-varying wireless environment is improved.

The invention discloses an LEO satellite power distribution and association method and system based on a cellular-free architecture in the technical field of wireless communication, and the method comprises the steps: carrying out the maximum ratio transmission precoding of all satellite access points, and generating a coding modulation signal; after the target users receive the coded modulation signals, receiving signals are formed at a receiving end, and the signal-to-interference ratio and the downlink transmission rate of each target user are calculated through the receiving signals; accumulating downlink transmission rates of all target users through a central satellite, and calculating system energy efficiency in combination with total power consumption of all satellite access points; and constructing an objective function with maximization of the system energy efficiency, solving the objective function through an iterative optimization algorithm under the constraint condition of a satellite transmitting power upper limit and a user-satellite coverage relationship, and determining an optimal power allocation and user-satellite association scheme. The method can adapt to the high-speed motion characteristic of the LEO satellite, and the system energy efficiency and the resource utilization rate are remarkably improved.

The invention discloses a hydroelectric power station state monitoring communication method, system and device and a medium, and the method comprises the steps: carrying out the channel attenuation prediction through employing an integrated learning algorithm, and obtaining a channel attenuation prediction result; based on a channel attenuation prediction result, communication parameter optimization is carried out through a control optimization algorithm, and the optimal transmitting power and coding modulation scheme are obtained; analyzing through a deep learning framework to obtain a communication traffic prediction result; dynamically adjusting resource allocation of each service flow through a bandwidth allocation strategy based on a communication flow prediction result to obtain optimized bandwidth resource allocation; through the configuration instruction, the communication parameter setting is dynamically adjusted, and the fine management of the communication system is realized. The satellite communication system of the hydropower station is more reliable and efficient, and better support is provided for operation management of the hydropower station.

The invention discloses a peak code modulation circuit based on a dynamic memristor, which comprises the dynamic memristor and a signal conversion module, and is characterized in that the signal conversion module comprises a signal isolation module, a feature extraction module and a pulse conversion module which are connected in sequence. The dynamic memristor generates a voltage signal with a slow-rising and steep-falling characteristic under constant current input. The signal isolation module comprises a high-impedance input buffer circuit; the feature extraction module comprises an asymmetric time constant signal processing circuit used for performing enhanced extraction on the steep drop feature of the memristor output signal; and the pulse conversion module comprises a dual-threshold positive feedback hysteresis comparison circuit and is used for converting the output signal of the feature extraction module into a rectangular digital pulse. The circuit is specially designed according to the characteristics of the memristor, is simple in structure, is easy to integrate, can achieve the efficient conversion from an analog signal to a standard digital pulse, and is suitable for the fields of neuromorphic calculation and low-power-consumption signal processing.

The present invention provides a digital full-bandwidth direct-forwarding radar transponder system and its working method, which proposes a brand-new radar transponder system architecture and a corresponding new Morse code recognition scheme. The system of the present invention adopts a direct-forwarding system architecture, which combines digital broadband DRFM real-time forwarding technology and a line-replacing-by-point coding response architecture. The transmitting and receiving antennas are independent and work simultaneously, directly and indiscriminately encoding and forwarding all radar interrogation signals within the working frequency band, achieving Morse coding of the response information while retaining the complete waveform information. The system of the present invention can be equivalent to a target with special target characteristics. When the radar signals within the working frequency band irradiate this target, echo signals with specified Morse code modulation characteristics will be generated.

The invention discloses a self-adaptive coding modulation method and system for relieving sun-borne interference in an ultra-dense low-orbit satellite network, and aims to improve the reliability and the spectrum utilization rate of satellite network communication. The method specifically comprises the following steps: modeling satellite-ground and inter-satellite communication links of the ultra-dense low-orbit satellite network, and modeling and calculating time generated by the sun and interference to the low-orbit satellite network; the ground station estimates and predicts the satellite-ground channel state, and returns the predicted SNR to the satellite; and according to the SNR returned by the ground station and the SNR generated by the sun, a deep reinforcement learning method is adopted to select a coding modulation scheme to perform downlink data transmission, and whether a lower satellite is selected to perform data unloading and then transmit the data to the ground station is determined. Simulation results show that the bit error rate of the ultra-dense low-orbit satellite network can be effectively reduced, the spectrum utilization rate can be remarkably improved, real-time response and efficient resistance to sun interference can be achieved, the satellite calculation load can be reduced, the comprehensive performance of the system can be improved, and the method has high practical application value.

The invention belongs to the technical field of commercial inventory management, and discloses a store inventory commodity management and search system based on RFID induction, and the system comprises the steps: collecting a phase change time sequence of candidate RFID tags at high frequency when a user executes a moving operation; before matching, analyzing actual motion characteristics of a user according to instantaneous frequency of a sequence, and performing dynamic normalization processing on a time axis; and when a plurality of targets exist in a matching result, further performing coded modulation on the transmitting power of the reader and analyzing the relevance of echo response to finish the final uniqueness arbitration. A traditional mode of probabilistic judgment depending on signal instantaneous quantity is converted into a deterministic inventory management process based on dynamic process feature confirmation, so that the problem of uncertainty of inventory searching and checking caused by commodity density and signal instability in a commercial environment is solved.

The invention discloses a multipath effect suppression method for 2.4 GHz radio frequency identification. The multipath effect suppression method comprises a transmitting end processing flow and a receiving end processing flow. A transmitting end carries out pulse code modulation on an analog signal to obtain a digital signal, blocks the digital signal after channel coding, and distributes the digital signal to subcarriers through quadrature amplitude modulation; and generating a time domain OFDM symbol through IFFT (Inverse Fast Fourier Transform), adding a cyclic prefix and a synchronization head, converting into an analog baseband signal, and performing up-conversion, filtering, amplification and radiation. The receiving end amplifies the signal, down-converts the signal to a baseband, filters the signal and converts the signal into a digital signal; the method comprises the following steps of: synchronizing header frame alignment, recovering a coding bit stream through FFT (Fast Fourier Transform) and QAM (Quadrature Amplitude Modulation) demodulation, carrying out CRC (Cyclic Redundancy Check) after decoding and merging, returning ACK (Acknowledgement Character) if According to the method, the multipath effect can be effectively inhibited, and the integrity of received data is improved.

The invention provides a coding modulation method and a related device, and the method comprises the steps: carrying out the coding of N input bit sequences through employing code rates corresponding to the N input bit sequences, and obtaining N coded bit sequences corresponding to the N input bit sequences; the length of each input bit sequence is determined according to at least one of a code rate, a modulation order or the number of resource elements (RE) used for data transmission corresponding to the input bit sequence; the N coded bit sequences are mapped to the same constellation diagram, the constellation diagram comprises M constellation points, each constellation point comprises N segmented bits, and the N segmented bits correspond to the N coded bit sequences respectively. According to the process, the transmission efficiency is guaranteed, the coding complexity of the sending end is reduced, in addition, the protocol modification degree is also reduced, and the coding implementation cost is further reduced.

The invention discloses a multi-frame reconstruction multispectral imaging system based on dynamic space-time joint coding. The system comprises a filtering window module used for limiting the spectral range of imaging; the spatial code modulation module is used for providing spectral codes in a spatial dimension; the time coding modulation module is used for carrying out inter-frame modulation on the spectrum codes provided by the space coding modulation module; the optical imaging module is used for imaging the light field modulated by the time coding modulation module on the color acquisition module; the color acquisition module is used for carrying out further spectral coding on the light field to obtain a measurement image; a calculation reconstruction module; the method is used for recovering a high-dimensional multispectral image data cube by using a measurement image. The method has the advantages of being light in weight, low in cost, high in underqualitative relieving capacity, efficient and stable in reconstruction method, high in adaptability and practicability and the like.

A UE that includes one or more non-transitory computer-readable media storing one or more computer-executable instructions for determining the number of coded modulation symbols for Uplink Control Information (UCI) in a Physical Uplink Shared Channel (PUSCH) transmission and at least one processor coupled to the non-transitory computer-readable media is provided. The processor is configured to execute the one or more instructions to cause the UE to determine that an Orthogonal Cover Code (OCC) is applied to the PUSCH transmission based on an indication received from a base station (BS) and determine the number of coded modulation symbols for the UCI based on the determination that the OCC is applied to the PUSCH transmission and a parameter received from the BS.

Disclosed are a transceiver decoding method and system based on protograph differential chaos shift keying (DCSK), the method including acquiring an information bit sequence, performing a coded modulation on the information bit sequence via a protograph DCSK transmitter, and outputting a plurality of modulated symbols; inputting each modulated symbol into a wireless channel for channel interference, and outputting a received symbol corresponding to each modulated symbol; using a target extrinsic information-aided network to determine a target a-posteriori probability vector corresponding to each received symbol; inputting each target a-posteriori probability vector into an a-priori calculation decoder for decoding, and outputting an initial decoded bit sequence; and determining a target decoded bit sequence according to the initial decoded bit sequence and a preset check matrix. The technical problem of lower decoding accuracy caused by the existing transceiver decoding methods designed for a DCSK system is solved.

The invention discloses a self-adaptive link control method for a multi-dimensional identification system, and belongs to the technical field of link control. The method comprises the following steps: embedding an environment sensing module in a multi-dimensional identification system to obtain network state information; introducing a reinforcement learning algorithm to carry out adaptive coding; the self-adaptive waveform is realized through discrete Fourier transform (DFT) and inverse discrete Fourier transform (IDFT); a self-adaptive waveform is realized through discrete Fourier transform (DFT) and inverse discrete Fourier transform (IDFT); and establishing a link layer frame format of the multi-dimensional identification system to realize communication link management. According to the invention, through combination of a multi-dimensional identification system and an environment perception technology, a network state and channel characteristics can be perceived in real time, and a link control strategy is dynamically adjusted; the data transmission efficiency can be dynamically optimized according to the network state and the channel condition by introducing the adaptive coding modulation and adaptive waveform technology; the data transmission time delay is obviously reduced, and the data packet disorder and packet loss rate are reduced, so that the user experience is improved.

A method of video encoding includes performing context modeling to determine a context model for each of a number of bins of syntax elements corresponding to residues of a region of a transform skipped block in a current picture. The number of the bins of syntax elements being context coded does not exceed a maximum number of context coded bins set for the region. The method further includes encoding, according to Block Differential Pulse Code Modulation (BDPCM), the syntax elements based on the determined context models. When the maximum number of context coded bins is reached, remaining bins of syntax elements are encoded based on a bypass model.

The invention discloses a single-channel received RIS direction of arrival estimation method, and relates to the technical field of wireless sensing, and the method comprises the steps: mapping a space-time coding matrix into a control signal, and loading the control signal to periodically arranged electromagnetic units of an RIS, thereby carrying out the space-time coding modulation of an incident signal, and forming a reflection signal comprising angle information; receiving the reflected signal by a single-channel receiving end and converting the reflected signal into baseband data, performing Fourier transform on the baseband data to obtain a frequency domain component, and constructing a plurality of virtual receiving channels; and constructing a covariance matrix based on the signal of the virtual receiving channel, performing eigenvalue decomposition on the covariance matrix, constructing a spatial spectrum function, and performing peak search on the spatial spectrum function to obtain the direction of arrival of the incident signal. The invention further discloses a single-channel receiving RIS direction of arrival estimation system, high-precision direction of arrival estimation under the single-channel receiving condition is achieved, and the system has the advantages of being simple in system structure, low in hardware cost, high in algorithm resolution and high in anti-noise capacity.

The invention discloses a sweep frequency interference modeling and interference optimization method for a remote control data link of an unmanned aerial vehicle. The invention provides: 1) a transmitter-receiver adaptive modeling system based on unmanned aerial vehicle signal priori parameters; 2) an interference source generation system which comprises four modulation types of single-tone interference, random binary code modulation interference, PN code MSK interference and pulse interference and integrates two modes of stepping frequency sweeping and frequency hopping frequency sweeping; and 3) an interference strategy intelligent optimization system based on a particle swarm optimization algorithm. Performing similarity verification through DTW, and establishing a high-fidelity communication link model; connecting an interference source to a communication system by adopting a front door coupling mechanism, and constructing a bit error rate-oriented black box optimization model; and finally, carrying out mechanism analysis on an optimization result through a multi-dimensional interference effectiveness evaluation system. According to the method, an efficient interference parameter optimization scheme is provided for the unmanned aerial vehicle countering defense system, the optimization convergence speed is remarkably improved while the interference efficiency is guaranteed, and the method has important application value in the field of low-altitude security and protection.

The invention discloses a programmable metasurface fault rapid diagnosis method based on orthogonal coding space-time modulation. The method comprises the following steps: step 1, applying independent orthogonal coding space-time modulation to each metasurface unit on a programmable metasurface to be diagnosed by adopting a time-varying signal based on orthogonal coding; 2, irradiating the programmable metasurface to be diagnosed by using a single-frequency plane wave; 3, receiving a reflection signal of the programmable metasurface to be diagnosed, and recovering each orthogonal coding channel energy from the reflection signal; step 4, according to the magnitude of the recovered orthogonal coding channel energy, determining a malfunctioning metasurface unit; when a certain unit breaks down, preset orthogonal coding modulation cannot be normally executed, so that a corresponding coding channel in a transmitting signal is lost, and therefore whether the unit corresponding to each coding channel breaks down or not can be judged by recovering energy distribution of each coding channel in a receiving signal, and accurate and efficient fault diagnosis is achieved.

Disclosed is a method comprising, by a transmitter apparatus, partitioning (901) an input data stream to obtain a bit stream X1 and a bit stream X2; subjecting (902) the bit stream X2 to encoding by LDPC encoders, to obtain X2 parity bits, and X2 information bits; applying (903) SPC encoding to the X2 parity bits, together with the bit stream X1, to obtain sign bits, wherein the bit stream X1 is used as padding bits; subjecting (904) the sign bits, the padding bits, and the X2 information bits, to an interleaver operation to obtain an interleaver output; subjecting (905) the interleaver output to Gray mapping to form multiple consecutive quadratic amplitude modulation, QAM, symbols; modulating (905) the QAM symbols by quadratic amplitude modulation to obtain a modulated data stream; and transmitting (906) the modulated data stream via a radio access network or optical fibre communication network.

The invention relates to the technical field of optical fiber sensing and signal processing, and discloses an optical fiber positioning and common-mode noise suppression integrated device based on time-frequency joint coding, which comprises a time-frequency coding modulation module, a common-mode noise suppression module is mounted at the bottom of the time-frequency coding modulation module, and a common-mode noise suppression module is mounted at the bottom of the common-mode noise suppression module. An optical fiber sensing link is installed in the common-mode noise suppression module. According to the optical fiber positioning and common-mode noise suppression integrated device based on time-frequency joint coding, the time-frequency coding modulation module deeply fuses frequency hopping spread spectrum coding and a heterodyne detection technology, and the encoder encodes a positioning signal and a noise suppression signal into a composite waveform, so that the probability of being interfered is reduced, and the positioning precision is improved. Positioning signal transmission and common-mode noise suppression can be achieved through the same optical fiber, the common-mode noise suppression module can dynamically adjust the noise suppression ratio and the accurate positioning precision according to the environment, a learning-adjustment-optimization closed loop is achieved, and the reliability of the system in complex environments such as traffic, outdoor and mine environments is improved.

The present application provides a signal transmission method based on random unitary coding modulation and cross-domain iterative detection, including random unitary coding modulation at a signal transmitting end and cross-domain iterative detection at a receiving end. The random unitary coding modulation includes random unitary modulation or random unitary precoding, utilizing random unitary transformations to ensure that an equivalent channel matrix satisfies the correct right unitary invariance assumption. The cross-domain iterative detection includes using a cross-domain iterative receiver to receive a signal obtained after the random unitary coding modulation. The random unitary coding modulation ensures that general OAMP / VAMP, UAMP, and MAMP-type receivers achieve Bayesian optimal performance. The cross-domain iterative detection allows, through cross-domain detection, the receiver to utilize ultra-sparse time-domain channels, including low-complexity MAMP, OAMP / VAMP, and UAMP-type receivers.

The utility model provides an automatic code modulation difunctional test strip which comprises a substrate, the substrate is provided with a first coding area and a second coding area, the first coding area is provided with a plurality of first coding electrodes, and the first coding area generates a first digital coding signal for a detection instrument to carry out code modulation on detection of a first index; the second coding area is provided with a plurality of second coding electrodes, and the second coding area generates a second digital coding signal so that the detection instrument can carry out code modulation on detection of a second index. The detection instrument can automatically identify the first digital coding signal generated by the first coding area and the second digital coding signal generated by the second coding area, so that the purpose of automatically carrying out code modulation on detection of the first index and the second index of the detection instrument is achieved, manual code number input is avoided, and the code modulation accuracy and convenience are improved.

The invention provides a continuous wave mud pulse code modulation method, device and equipment and a storage medium, and belongs to the technical field of oil and gas drilling. The method comprises the following steps: encoding detected target acquisition information into a multi-system code element; two code elements are taken as a group to form a code element group, and the code element group controls the rotating speed of a rotor together to form a modulated pressure wave signal for determining a phase delay degree and a phase switching position corresponding to the phase delay degree; wherein the phase switching position is a time period when the corresponding phase delay degree occurs in a modulation period of the code element group to the pressure wave signal. According to the invention, on the premise of not additionally occupying frequency band resources, the transmission information amount is doubled, so that the signal transmission rate based on the continuous wave mud pulse is doubled, and the defect of low transmission rate in the traditional code modulation mode for the continuous wave mud pulse is overcome.

The invention discloses a voltage measurement method based on pulse coding and related equipment, relates to the technical field of voltage measurement, and solves the problem of low voltage measurement precision. The method comprises the following steps: generating a pseudo-random coding sequence with sparse time domain, and modulating a pilot frequency reference signal based on the pseudo-random coding sequence to obtain a low-frequency pulse modulation wave; performing pulse power amplification on the low-frequency pulse modulation wave, and migrating a signal frequency band to a high-frequency range to obtain a high-frequency pulse train; and after the high-frequency pulse train is injected into the measured line, acquiring a coupling signal, and extracting a characteristic component corresponding to the pseudo-random coding sequence from the coupling signal so as to invert the voltage value of the measured line. According to the invention, the pilot frequency reference signal based on pulse code modulation is adopted to replace a continuous sine wave, so that the power consumption of signal injection can be reduced; and the corresponding characteristic component in the coupling signal is identified through the pseudo-random coding sequence, so that interference of a strong electromagnetic signal can be avoided, and the voltage measurement precision is improved.

An electronic device comprising circuitry configured to generate a coded modulation signal (54; 60) for modulating illumination light (16; 55) transmitted by a time of flight camera (3).

The invention discloses a method for detecting a frequency hopping signal under a low signal-to-noise ratio based on an FPGA (Field Programmable Gate Array), which comprises the following steps of: at a transmitting end, adding a synchronous sequence with low side lobe, high anti-interference performance and self-adaptive adjustment of sequence length under different channel conditions to a frame header and a frame tail of a data frame, and after coding modulation and up-conversion at the transmitting end, carrying out frequency hopping on the frequency hopping signal under the low signal-to-noise ratio; the frequency hopping signals are converted into a group of frequency hopping signals with m hops; and at a receiving end, counting over-threshold frequency hopping signals, jointly judging whether the packet of data is valid data, and dynamically adjusting a correlation peak threshold according to a channel condition. According to the invention, the synchronization accuracy is improved.

The invention discloses a low-orbit satellite Internet of Things terminal baseband communication system, and relates to the technical field of Internet of Things communication. The system comprises a data frame construction unit, a channel regulation and control unit, a bandwidth tracking unit and a decoding correction unit, wherein the data frame construction unit generates an initial frame according to an Internet of Things protocol and dynamically adjusts a frame structure in combination with channel characteristic parameters to complete data packing; and the channel regulation and control unit judges a coding modulation mode according to real-time channel quality and satellite motion parameters, processes a transmitting link, dynamically adjusts the transmitting power of the high-frequency analog signal based on path loss estimation, and finally transmits the high-frequency analog signal through an antenna. At a receiving end, a bandwidth tracking unit adaptively adjusts the loop bandwidth according to the switching characteristic parameter, and dynamically filters the received signal; and the decoding correction unit performs adaptive early stop correction of iterative decoding according to the decoding convergence rate, and finally completes data analysis.

The invention discloses a wireless charging circuit for detecting foreign matters. The wireless charging circuit comprises a transmitting end and a receiving end. The transmitting end generates an alternating magnetic field through a high-frequency full-bridge inversion module, and performs coded modulation based on a unique preset device number. The receiving end senses the magnetic field through coupling and samples and decodes the magnetic field to realize three-stage verification with the transmitting end, and the three-stage verification comprises wireless communication verification, encryption key verification and equipment identity verification. The control module determines whether to start charging or output a metal foreign matter alarm signal according to the verification result. According to the scheme, the hierarchical safety verification process is completed before charging, so that the safety of wireless energy transmission and the accurate recognition capability of the system on the foreign matter are ensured, the stability and reliability of the wireless charging system are improved, the abnormal problem of fire catching caused by heating of the foreign matter in the charging process is avoided, and the charging safety is improved. Meanwhile, the method is suitable for wireless power supply application scenes supporting a security authentication mechanism.

Methods, systems, and devices for wireless communications are described. In some examples, a device may compute the coding rate associated with each coding level of coded modulation scheme based on one or more channel conditions of a wireless channel. The device may allocate multiple information bits among multiple coding schemes associated with a multi-level coding scheme. The quantity of information bits allocated to each coding scheme may be based on the coding rates associated with one or more coding levels corresponding to the coding scheme. The device may encode an information payload using the multiple coding schemes in accordance with the allocation of the multiple information bits. The device may transmit the encoded information payload via the wireless channel. The receiving device may compute the coding rate associated with each coding level of the multi-level coding scheme and allocate the information bits accordingly. The receiving device may decode the payload.

The invention provides an acoustic-magnetic coupling backflow cable nondestructive testing and long-distance transmission integrated method and system, and relates to the technical field of backflow cable transmission detection, accurate fault identification and positioning are realized by sending acoustic-magnetic dual excitation signals to a backflow cable, collecting responses, extracting multi-source features and then performing fusion model analysis, and the detection accuracy is improved. The problem that a traditional method is low in detection precision is solved. After being coded and modulated, a detection result is stably transmitted to a receiving end through a long-distance transmission link, so that the integration of nondestructive detection and long-distance transmission of the acoustic-magnetic coupling backflow cable is realized, and the defect of instability of long-distance transmission is overcome. And a self-adaptive power amplification and frequency hopping anti-interference mechanism is adopted in the transmission process, so that the anti-interference performance, the stability and the environmental adaptability of signal transmission are improved, and the actual requirements of backflow cable detection and long-distance transmission in a strong electromagnetic interference environment and a complex working condition are met. By introducing a self-adaptive calibration mechanism and comparing with a reference signal, excitation and acquisition parameters are corrected in real time, and the detection precision and the long-term reliability are further improved.