817 results about "Spread spectrum" patented technology

The invention discloses a cable fault positioning method and system based on reflected wave decomposition and kurtosis sorting, and aims to solve the problem that a cable fault is difficult to detect under a low impedance change rate. The method comprises the steps of transmitting an incident excitation signal to a cable to obtain a first reflection signal in the cable; an improved VMD algorithm is adopted for decomposition to obtain K IMF components, and the IMF with the maximum kurtosis is selected as a second reflection signal; acquiring a time-frequency distribution curve of the second reflected signal by using short-time Fourier transform and frequency spectrum redistribution technologies; and constructing a two-dimensional energy-time curve by extracting an energy value and time under the frequency of the maximum energy amplitude point, and determining a fault position. The system is composed of an incident excitation module, a decomposition module, an STFT-RSP module and a fault positioning output module, and the positioning method is achieved. According to the method, the limitation of a traditional spread spectrum time domain reflection positioning method in cable fault detection is effectively overcome, and an efficient and accurate instructive technology is provided for cable fault positioning and detection.

The invention discloses a continuous terahertz wave imaging quantitative detection system and method for internal defects of a multilayer nonmetal structure, and belongs to the technical field of terahertz nondestructive testing. The detection system comprises a continuous wave linear frequency modulation signal source, a spread spectrum module, a terahertz transceiving probe, a focusing lens, a system control and processing computer, a four-dimensional scanning frame, a scanning frame controller, a detected test piece and a lifting platform, the detection method comprises the steps of determining detection parameters of the detection system; collecting a terahertz detection signal; performing wavelet transform on the terahertz detection signal to obtain a continuous wavelet coefficient; using empirical mode decomposition to decompose the continuous wavelet coefficient into an intrinsic mode function and a residual function; and positioning and imaging the internal defects of the non-metallic material by using the first-order intrinsic mode function as an imaging parameter. According to the method, high-resolution visual detection and accurate positioning can be effectively carried out on the internal defects of the multi-layer non-metal structure, and the method has a relatively high application value for ensuring the safe operation of a major structure.

The invention discloses a range gating anti-disturbance optical frequency domain reflection distributed measurement device and method. The device comprises a sweep frequency laser light source, a first optical coupler, a Mach-Zehnder modulator, a circulator, a detection optical fiber, a polarization controller, a second optical coupler, a balanced photoelectric detector and a data measurement unit. Wherein the Mach-Zehnder modulator is configured to perform BPSK modulation on the input probe light by using a pseudo-random spread spectrum coding technology. By means of the device and the method, the contradiction that long-distance measurement and fast frequency sweeping are difficult to achieve at the same time in a traditional OFDR is successfully solved.

The invention relates to a satellite communication encryption method resistant to channel interference. According to the method, satellite orbit parameters are dynamically mapped into a chaos spread spectrum sequence, an anti-interference pseudo-random sequence and a dynamically decoupled encryption key are synchronously generated based on the chaos sequence, a spread spectrum code and the key are completely isolated mathematically, chaos parameters and a channel state are hidden and embedded into a physical layer signal, and therefore the anti-interference pseudo-random sequence and the dynamically decoupled encryption key are obtained. According to the method, deep cooperation of anti-interference and encryption is achieved, the concealment and the anti-interception capability of signals in a complex channel are enhanced through chaos spread spectrum, the synchronization precision of a decryption end is guaranteed through real-time binding of a dynamic key and channel parameters, and finally synchronous improvement of the anti-interference capability and the information security is achieved in a satellite communication high-dynamic environment.

A data and clock recovery circuit, a receiving apparatus, a circuit system, a vehicle-mounted device, a vehicle, and a data and clock recovery method are provided. The data and clock recovery circuit includes a sampler, a phase detector, a multi-order filter, a frequency change detection circuit, and a selector. The sampler is configured to sample an input signal based on a multi-order filtered signal to generate a sampled signal. The phase detector is configured to determine a phase difference in the sampled signal based on the sampled signal. The multi-order filter is configured to generate the multi-order filtered signal based on the phase difference. The frequency change detection circuit is configured to determine a frequency change direction of a spread spectrum clock in the input signal by using the phase difference.

The invention relates to the technical field of power transmission line safety monitoring, and particularly discloses a self-adaptive calibration method for an ultrasonic wind speed sensor, which comprises the following steps of: arranging an orthogonal ultrasonic probe array at the top of a tower, and compensating probe offset caused by swinging of a tower body in real time through GNSS / IMU (Global Navigation Satellite System / Inertial Measurement Unit) fusion positioning; integrating a temperature, humidity and pressure sensor and vibration spectrum analysis to construct an environmental parameter compensation model; double-frequency ultrasonic waves are adopted to detect the ice accumulation thickness of the protective cover and correct the sound path distance; deploying a lightweight LSTM model at an edge computing unit to realize minute-level dynamic parameter adjustment; electromagnetic interference is suppressed by combining linear frequency modulation spread spectrum and beam forming technologies; and establishing a three-height-layer wind speed gradient model to generate a galloping early warning. The problem of measurement distortion caused by tower deformation, icing and parameter solidification of a traditional sensor is solved, all-working-condition operation from-40 DEG C to 60 DEG C is supported, and the monitoring reliability in a strong electromagnetic environment is remarkably improved.

The invention discloses an unmanned aerial vehicle individual countering method and system based on radio frequency identification and dynamic interference, and belongs to the technical field of unmanned aerial vehicles, and the method comprises the steps: collecting wide-band IQ data, extracting hidden features such as instantaneous frequency offset fluctuation and envelope entropy abnormity, and achieving high-dimensional embedded expression through a variational auto-encoder. Structured recognition is carried out on signals in combination with a graph neural network, the discrimination capability of frequency hopping, spread spectrum or Wi-Fi / LTE simulation signals is remarkably improved, a dynamic interference strategy is finally generated according to a recognition result, accurate recognition and intelligent suppression of illegal unmanned aerial vehicle communication are achieved, and the method is suitable for popularization and application. The technical defect that an existing system is insufficient in recognition robustness and countering effectiveness in a complex environment is effectively overcome.

The invention relates to the technical field of satellite transmission service or radio transmission service of a space station or an airborne station, in particular to a narrow-band interference elimination method based on spread spectrum communication applied to satellite transmission service, which comprises the following steps: S1, performing FFT (Fast Fourier Transform) operation on a digital baseband signal, converting the digital baseband signal into a frequency domain signal, determining a judgment threshold according to the background noise power, and judging a component greater than the threshold as an interference signal; s2, based on a sequential return-to-zero algorithm or a sequential pruning algorithm, frequency points with interference signal components in each frequency domain under the AWGN condition are cut off; s3, using windowed FFT operation, and popularizing the application under the AWGN condition in the S2 to the application under the narrowband interference condition; and S4, reducing the frequency domain signal after the interference signal component frequency points are removed into a time domain signal by adopting IFFT (Inverse Fast Fourier Transform) operation. The method has a good application prospect in the fields of manufacturing of space-based satellite systems and other spacecrafts, manufacturing of satellite antennas and other communication system equipment, satellite transmission services and the like.

The invention discloses a method capable of realizing wide-range positioning of a cable fault, a spread spectrum step frequency wave signal is obtained by performing binary phase shift keying (BPSK) and pseudorandom sequence modulation on a step frequency signal, and the method can overcome the problem that the cable fault detection range of a spread spectrum time domain reflectometry (SSTDR) is limited by code element duration. A cable fault detection device is installed at the head end of a cable, a detection signal is injected from the head end of the cable, a high-speed ADC is used for signal collection, cable fault information is obtained, and wide-range detection of cable faults is achieved.

The invention relates to the technical field of communication, in particular to a satellite communication anti-interference transmission method based on a frequency hopping and spread spectrum fusion algorithm. According to the method, interference power is collected at multiple nodes, multiple sub-carrier frequencies and multiple moments to construct an interference observation tensor, interference features are extracted through low-rank tensor decomposition, and interference of each sub-carrier frequency in a future frequency hopping time slot is predicted; calculating a signal to interference plus noise ratio and capacity according to predicted interference in combination with transmitting power and noise, constructing a utility function containing a service weight and a balance coefficient, and distributing working sub-carrier frequency to each satellite communication node under concurrency constraint to generate a frequency hopping sequence; a transmitting end performs channel coding, modulation and spectrum spreading on service data and transmits the service data according to a frequency hopping sequence, and a receiving end completes synchronization, de-spreading and decoding and performs weighting processing by utilizing predicted interference. The method improves the spectrum utilization rate and the interference suppression capability, and enhances the satellite communication reliability.

A device according to the present disclosure includes: a PLL configured to modulate and output a frequency of a clock used to synchronize communication data in accordance with a regulation signal applied thereto, and a controller configured to generate the regulation signal according to a modulation waveform which is a successive form of a plurality of modulation wave units determined by a set modulation profiled, and apply the regulation signal to the PLL. The modulation wave unit is a signal whose sum of signal values during its time length becomes zero for the first time, and at least two successive modulation wave units among the plurality of modulation wave units differ from each other in at least one of the time length and the form of the signal.

The invention discloses an encrypted communication system and method based on cognitive multi-carrier spread spectrum, and belongs to the field of covert communication. The encryption communication system comprises a transmitting device and a receiving device. The transmitting device comprises a data encryption module, a constellation encryption modulation module, a multi-carrier spread spectrum module, a frequency hopping module and a cognitive power distribution module. The receiving device comprises a band-pass filtering module, a de-hopping frequency module, a de-spreading module, a constellation decryption demodulation module, a data decryption module and a coherent combination module. The data encryption module is divided into an interleaving coding unit and a double-rule reversible cellular automaton encryption unit. The cognitive power distribution module continuously scans a wireless electromagnetic environment and carries out real-time spectrum analysis to give power spectrum density results sensed under all frequency hopping frequency sets. According to the invention, continuous detection and dynamic response to the spatial frequency spectrum state can be realized, and the communication concealment, the anti-interference performance and the resource utilization efficiency in a complex electromagnetic environment are remarkably improved by utilizing the frequency spectrum hole.

The invention discloses a weak spread spectrum signal hierarchical synchronous receiving method, which is based on a long coherent accumulation mechanism, utilizes the difference of the code lengths of different spread spectrum codes to the sensitivity of frequency offset, and realizes the efficient synchronous receiving of the signals through the hierarchical capture of code phases and the step-by-step compensation of the frequency offset. Compared with a traditional two-dimensional joint search (code phase and frequency) method, the method has the advantages that the search process is optimized into one-dimensional search, and exhaustive search of frequency dimension is avoided, so that the calculation complexity is remarkably reduced, and the processing efficiency is improved. According to the method, a strategy of capturing the code phase step by step is adopted, and a coarse estimation scheme and a fine estimation scheme of frequency offset are combined, so that relatively high capturing sensitivity and synchronization precision are ensured. Especially in a low signal-to-noise ratio environment and a complex channel condition, the receiving reliability of the spread spectrum signal can be effectively improved. The method and the system have the advantages of low calculation complexity, simplicity in hardware implementation, high adaptability and the like, and an innovative solution is provided for receiving and processing weak spread spectrum signals.

The invention belongs to the technical field of communication and sensing integration, and particularly relates to a terahertz communication and sensing integration method based on FM-SC-OFDM waveforms. According to the method, the DFT spread spectrum technology is utilized, the PAPR of an FM-OFDM instantaneous frequency OFDM sequence is reduced, the instantaneous frequency / phase sequence property is optimized, the phase demodulation error is relieved, and finally, the inherent communication and sensing performance is further enhanced under the condition that the waveform constant envelope and the frequency offset resistance property are inherited in a lossless mode, so that a complete ISAC architecture is provided. The FM-SC-OFDM is proposed by taking SC-OFDM as an instantaneous frequency sequence, the phase demodulation error effect faced by the FM-OFDM is relieved, the BER performance and the perception precision performance are broken through, and a novel integrated waveform which can avoid the power amplifier nonlinear effect and has strong frequency offset robustness is provided for a THz ISAC system.

Provided are a communication method and a communication device, the method comprising: determining a transmission waveform of a signal, the transmission waveform being related to a threshold of a first parameter, the first parameter comprising: a modulation order and a roll-off factor, the transmission waveform is an orthogonal frequency division multiplexing QAM-DFTS-OFDM waveform of discrete Fourier transform spread spectrum of orthogonal amplitude modulation or an orthogonal frequency division multiplexing OQAM-DFTS-OFDM waveform of discrete Fourier transform spread spectrum of offset orthogonal amplitude modulation, and the roll-off factor is determined based on the transmission bandwidth and the number of symbols carried by the transmission waveform. And transmitting or acquiring the signal. In the method provided by the invention, the network equipment or the terminal equipment can determine the transmission waveform of the signal according to the set threshold value of the modulation order and the threshold value of the roll-off factor, so that the output power supporting higher power amplifiers can be obtained, and a larger signal coverage range can be obtained.

The invention discloses a carrier tracking method suitable for a multi-bit spread spectrum signal, and relates to the technical field of multi-bit spread spectrum, the carrier tracking method comprises the steps of coarse frequency offset correction, multi-bit spread spectrum, average phase estimation and delay phase correction.The carrier tracking method comprises the steps that firstly, a sliding DFT algorithm is adopted to estimate frequency offset, and a coarse frequency offset available correction signal is obtained; secondly, adaptively selecting the number of available windows according to historical data corresponding to the current signal-to-noise ratio; the method comprises the following steps: firstly obtaining a window intermediate point spread spectrum period, then extracting a carrier phase estimation value of the window intermediate point spread spectrum period, finally delaying a correlation value by the spread spectrum period to realize time sequence alignment and eliminate phase deviation, and finally obtaining information bits corresponding to each spread spectrum period by extracting and correcting a real part of the correlation value, matching a local sequence number and mapping. According to the method, the phase estimation precision under the low signal-to-noise ratio can be improved, parameter self-adaption to high and low dynamic scenes of a satellite is realized, the coherent judgment performance is improved, and the hardware complexity is reduced.

The present invention discloses a hierarchical synchronous reception method for weak spread spectrum signals. Based on the long coherent accumulation mechanism, the method utilizes the difference in sensitivity of different spread spectrum code lengths to frequency deviation, and realizes efficient synchronous reception of signals by hierarchically capturing the code phase and compensating for the frequency deviation in steps. Compared with the traditional two-dimensional joint search (code phase and frequency) method, the present invention optimizes the search process into a one-dimensional search, avoiding the exhaustive search in the frequency dimension, thereby significantly reducing the computational complexity and improving the processing efficiency. The present invention adopts a strategy of capturing the code phase step by step, combined with a coarse estimation and fine estimation scheme of the frequency deviation, to ensure high capture sensitivity and synchronization accuracy. Especially in low signal-to-noise ratio environments and complex channel conditions, the present invention can effectively improve the reception reliability of spread spectrum signals. The method and system have the advantages of low computational complexity, simple hardware implementation, and strong adaptability, and provide an innovative solution for the reception and processing of weak spread spectrum signals.

The invention relates to the field of underwater sound control, in particular to a differential spread spectrum underwater sound remote control method resistant to channel interference and Doppler. The invention provides a differential spread spectrum signal processing method based on an underwater sound remote control system, and provides a set of multipath interference resisting method combining peak searching and deconvolution aiming at a multipath effect. Aiming at the influence of noise and Doppler, a differential spread spectrum signal in a code element difference mode is used as a response signal of the UUV, a double-pulse method is firstly used for Doppler coarse compensation during resolving, and then an orthogonal receiver is used for orthogonal demodulation to obtain two paths of signals; finally, coefficients containing residual Doppler and sampling errors can be offset as much as possible in a differential solution link in a differential conjugate multiplication mode. A simulation result shows that compared with a traditional method, the anti-noise and anti-multipath capability is high, and when the relative movement speed between the UUV and the water surface mother ship is small, the bit error rate is lower.

The present disclosure provides a display driving circuit, comprising: an oscillator for generating an oscillator clock; the real-time tracking circuit is connected with the oscillator and is used for performing real-time tracking control on the oscillator based on an external clock, so that the oscillator clock generated by the oscillator tracks the frequency of the external clock; the clock spread spectrum circuit is connected with the oscillator and is used for performing spread spectrum control on the oscillator, so that an oscillator clock generated by the oscillator is spread spectrum; and the display control circuit is connected with the oscillator, the real-time tracking circuit and the clock spread spectrum circuit, and is used for alternately enabling the real-time tracking circuit and the clock spread spectrum circuit by utilizing an enabling control signal and generating a display driving signal according to an oscillator clock generated by the oscillator. The invention further provides a display driving chip and electronic equipment.

The invention relates to the field of satellite communication, discloses a spread spectrum acquisition method and device, electronic equipment and a storage medium, and belongs to the technical field of spread spectrum acquisition in the field of wireless communication, and the spread spectrum acquisition method comprises the steps: carrying out the grading of a satellite moving speed range; under each gear, compensating the spread spectrum receiving signal and then performing sliding correlation, determining the gear with the maximum correlation peak value, and recording a first time offset estimation value and a first frequency offset estimation value to finish primary acquisition; after a spread spectrum receiving signal is compensated based on the first time offset estimation value and the first frequency offset estimation value, time domain acquisition is carried out to obtain a second time offset estimation value; and after compensating a spread spectrum receiving signal based on the second time offset estimation value and the first frequency offset estimation value, performing frequency domain acquisition to obtain a second frequency offset estimation value. According to the invention, the problems of precision and sensitivity in a spread spectrum signal capturing process are solved.

The invention relates to a satellite communication CDMA spread spectrum signal blind detection method and system based on deep learning. The method comprises the following steps: preprocessing data; building a deep learning model; extracting features; blind detection algorithm processing; and evaluating and optimizing the performance of the algorithm model. According to the method, effective blind detection of the CDMA spread spectrum signal is realized by aiming at the CDMA spread spectrum signal in satellite communication and utilizing the strong feature extraction and mode recognition capability of the deep learning model, the blind detection accuracy and robustness of the CDMA spread spectrum signal in satellite communication in a complex electromagnetic environment are improved, the performance and stability of a satellite communication system are improved, and the method is suitable for popularization and application. According to the method and the device, the dependence on external information is reduced, powerful support is provided for reliable operation of satellite communication, and the problem of accurately detecting the satellite communication CDMA spread spectrum signal in an actual communication scene in which a user spread spectrum code is unknown or difficult to obtain is solved.

The invention relates to a dynamic wireless key frequency hopping communication anti-interference system and a method thereof. The system comprises a transmitting end and a receiving end, the transmitting end comprises an information source scrambling module, a Turbo coding module, a spread spectrum module, a framing module, a frequency hopping pattern generation module and a forming filtering module; and the receiving end comprises a digital front-end processing module, a frequency hopping synchronization module, a signal synchronization module and a demodulation module. The frequency hopping pattern based on the chaotic system has high randomness and predictability, and tracking interference and eavesdropping are effectively resisted.

The invention discloses a manganese ore deposit exploration effect evaluation method and system based on a spread spectrum induced polarization method, and relates to the technical field of deposit exploration. The method comprises the following steps: constructing a three-dimensional geologic model of a mining area, initially arranging an exploration unit and acquiring actual exploration data, inverting the actual exploration data to generate an initial geologic profile map, performing exploration simulation in the three-dimensional geologic model and acquiring simulated exploration data, acquiring a distortion index and a spatial influence degree of the actual exploration data and constructing an exploration correction model; the exploration unit is reset, corrected exploration data are obtained, and inversion is carried out on the corrected exploration data to generate a corrected geological profile map; the effectiveness of various data obtained in the ore deposit exploration process can be improved, the distribution condition of an ore deposit can be better reflected, and then the accuracy of ore deposit exploration is enhanced.

The invention belongs to the technical field of wireless communication, and particularly discloses a high-dynamic stable tracking method for non-spread-spectrum continuous wave signals. The method comprises the following steps: obtaining a digital signal based on ADC sampling, and carrying out digital frequency conversion on all sampling points of a current symbol according to a current estimated frequency result to obtain a digital baseband signal; a digital baseband signal under 4 times of oversampling is obtained through multi-stage downsampling, matched filtering processing is carried out on the digital baseband signal under 4 times of oversampling, and an output result of a preset position in matched filtering output is determined as an optimal sampling point to serve as output of a tracking loop; and performing timing error estimation according to an output result of the matched filtering, adjusting the sampling deviation of the next section of data by using a timing error estimation result, solving a phase discrimination value according to the optimal sampling point, and adjusting the digital frequency conversion of the next section of data by using the phase discrimination value. According to the scheme, the technical problem that the non-spread-spectrum continuous wave signal cannot be continuously and stably tracked in a high-dynamic scene is solved.

The invention relates to the technical field of wireless communication, and provides a short code RM coding method and device based on a multipath channel, a medium and a program product, in the method, RM coding redundancy bits are increased in groups to resist deviation of a related maximum value and an ideal position caused by symbol offset brought by other secondary path delays; meanwhile, as the spread spectrum can expand the signal on a relatively wider frequency band and can reduce the propagation problem caused by multipath and attenuation, the spread spectrum processing is carried out on the data after the RM redundant coding is carried out, so that the sent information has very strong anti-multipath capability, and the performance of RM coding and decoding in a multipath environment is greatly improved.

The invention discloses an IGBT module detection method and device based on spread spectrum time domain reflection and a medium, and the method comprises the steps: constructing a module equivalent model corresponding to an IGBT module, and determining model parameters corresponding to the module equivalent model; generating a spread spectrum time domain reflection signal based on a spread spectrum time domain reflection signal platform; performing aging simulation on the IGBT module through a specified bonding wire in the equivalent model of the fracture module, and determining a target model parameter corresponding to the IGBT module after the aging simulation; transmitting the spread spectrum time domain reflection signal to the IGBT module after aging simulation so as to determine an incident signal and a reflection signal obtained by the IGBT module through the spread spectrum time domain reflection signal according to the target model parameter; and performing cross correlation on the incident signal and the reflected signal to obtain a cross-correlated signal amplitude, and establishing a mapping relation between the signal amplitude and the aging position so as to realize aging detection of the IGBT module based on the mapping relation.

The circuits and methods described herein provide a technical solution for technical issues for USB links. To reduce or eliminate the effects associated with the entry of a USB link into a low power mode, an initial link acquisition may be performed while disabling spread spectrum clock (SSC) modulation. After initial link acquisition, SSC modulation may be dynamically enabled at a later stage. This delayed activation of the retimer provides improved performance compared to a solution in which SSC modulation is continually activated, including reducing the complexity of the timing training process and enabling faster USB link re-establishment. This reduced link acquisition period may enable the system to enter the power saving mode more frequently and may reduce the latency involved in exiting the power saving mode. This may maintain or improve the overall USB transmission speed, and may reduce USB-related power consumption for USB-connected devices.

A measurement and control simulation device based on a measurement and control data transmission integrated system comprises an upper computer display control test module, a PC host module, a signal processing master controller module, an isolation DC / DC module, a down-conversion module, a filtering module, an isolator module and an outer end face interface module. The system has the characteristics of multiple modulation systems, a spread spectrum function, controllable output power, Doppler frequency change and the like, can be used for simulating a star chain control system link test in a ground test system, and fully improves the index assessment performance during system docking; meanwhile, the design of a down-conversion link meets the requirements for the strength and sensitivity of the received signal, the stability and accuracy of the radio-frequency signal after frequency conversion in a low-power injection state are remarkably improved, and a new scheme is provided for a high-frequency conversion mode. Besides, the display control module of the equipment has the functions of multiplexing, reconstruction, multi-data interaction and the like, so that multifunctional and multi-task full-system test coverage can be realized, the cost investment of test systems such as spacecrafts and the like is greatly reduced, and the multifunctional index test coverage efficiency is improved.

The invention relates to the field of spaceflight measurement and control, and discloses a large-scale constellation multiple access measurement and control spread spectrum signal de-spreading bit width quantization method. Signal samples are counted, a noise deterioration factor and a bit width quantification model are respectively established, the de-spreading bit width is accurately expanded, and the optimal balance of resources and performance is realized. The method solves the problem that the detection range of strong and weak signals is limited when a single receiver detects multi-satellite same-frequency signals at the same time, remarkably improves the system capacity, and has the characteristics of quantizability, large dynamic range and multi-constellation adaptation.

The invention discloses a capacity-expanding anti-interference measurement and control communication method, which comprises the following steps of: 1, generating M alternative spread spectrum sequences; step 2, the transmitting end performs parallel combined spread spectrum, including parallel transmission, spread spectrum superposition and carrier modulation; wherein during spectrum spreading, in I and Q, any one alternative spectrum spreading sequence in one path is selected as a synchronization sequence, and all the remaining alternative spectrum spreading sequences are subjected to combined spectrum spreading; step 3, blind interference signal separation at a receiving end: at the receiving end, firstly carrying out carrier demodulation on all interference signals and measurement and control signals received by the array antenna, and then carrying out blind interference signal separation on observation signals after carrier demodulation to obtain separated expansion anti-interference measurement and control signals; and finally, recovering the expanded anti-interference measurement and control signal to obtain recovered data. According to the invention, parallel combination spread spectrum and blind interference signal separation processing are organically combined, so that the anti-interference capability of the measurement and control system can be ensured while the system capacity is improved.