76 results about "Pseudorandom sequence" patented technology

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 discloses a satellite network data sending method and a satellite network data sending device in order to solve the problem that in the prior art, in an ultra-low signal-to-noise ratio mode, frame capture and data demodulation cannot be completed, and therefore the communication requirement of a small-size antenna terminal cannot be met. The frame body part is generated based on the to-be-transmitted satellite load data packet, and the frame header part comprises a pseudorandom sequence and a physical layer signaling which are sufficient in length, so that the signal-to-noise ratio of the whole data frame is improved by increasing the length of the frame header, and the communication performance of the antenna terminal is improved. Therefore, the antenna can be detected and identified by a small-size antenna terminal under the condition of a low signal-to-noise ratio.

The invention discloses an optical fiber optical frequency transmission relay system and method based on a spread spectrum technology. The relay system comprises a receiving module, a regenerative laser module and a sending module. The receiving module is used for demodulating the spread spectrum optical signal according to the second pseudo-random sequence to obtain a demodulated optical signal; the spread spectrum optical signal is a signal which is transmitted through an optical fiber link after a preceding stage performs spectrum spreading on the optical signal; the regeneration laser module is used for locking the frequency of the demodulation optical signal to generate a regeneration optical signal and splitting the regeneration optical signal to obtain a return optical signal and a transmission optical signal; the receiving module is also used for modulating the returned optical signal according to the second pseudo-random sequence and transmitting the modulated returned optical signal back to the preceding stage; and the sending module is used for demodulating the post-stage modulation return optical signal to obtain a demodulated return optical signal, carrying out noise suppression and spectrum spreading on the transmission optical signal according to the demodulated return optical signal and a third pseudo-random sequence, and then transmitting the transmission optical signal to the post-stage. By introducing the spread spectrum technology, the second-order Rayleigh scattering signals are filtered out, and the stability and reliability of the system are remarkably improved.

The invention relates to a method (200) for calibrating a conversion chain (12) of an analogue signal receiver (10), which method comprises: - generating (205) a pseudo-random sequence (S) of states used for the formation (210) of a frequency-modulated analogue calibration signal (ANA_cal,mod); - injecting (215) this calibration signal into the conversion chain (12); - forming a digital signal to be processed (NUM_BB) by demodulating (220) an intermediate digital signal (NUM_int) received in response to the modulated analogue calibration signal (ANA_cal,mod); - determining (225) a correlation function R(NUM_BB,S) between the digital signal to be processed (NUM,BB) and the pseudo-random sequence (S); - determining (230) a transfer function (H) of the conversion chain based on the correlation function R(NUM_BB,S); and - where necessary, determining (235) a parameter (Ci) of a processing step at the output based on the transfer function (H).

The invention discloses a fiber laser spectrum broadening device and method based on pseudo-random sequence phase modulation. The device comprises a single-frequency laser, a first optical fiber coupler, a phase modulator, a second optical fiber coupler, a third optical fiber coupler, a feedback module and a control module which are connected in sequence. The control module comprises a parameter setting and data writing unit, a main control unit, a pseudorandom sequence generation unit, a microwave low-pass filter, a pi phase modulation control unit and a radio frequency amplifier. The laser line spacing and the contour spectrum width can be controlled through modulation frequency, code pattern and pi phase modulation, the laser line top flatness can be controlled through modulation depth fine tuning, and discrete fiber laser spectrum planarization broadening based on pseudo-random sequence phase modulation is achieved. The narrow linewidth modulation laser source is high in adaptability, high in intelligent degree, convenient to integrate, good in engineering practicability and capable of effectively improving the stimulated Brillouin scattering threshold power of the system when the linewidth is 10 GHz magnitude.

The present disclosure relates to a 5G or 6G communication system for supporting a high data transmission rate. An apparatus and method for SRS enhancement for interference randomization in a wireless network. A method performed by a user equipment (UE) includes receiving a configuration for sounding reference signal (SRS) resources. The configuration includes information about a cyclic shift offset # imgabs0 # and a transmission comb offset [epsilon] {0, 1,..., KTC-1}. # imgabs1 # is the maximum number of cyclic shifts, and KTC is a transmission comb number. The SRS resource is associated with a plurality of antenna ports. The method further includes determining a cyclic shift offset for each of the plurality of antenna ports based on the first pseudorandom sequence; determining a transmission comb offset for each of the plurality of antenna ports based on the second pseudorandom sequence; and transmitting the SRS resource on the basis of the cyclic shift offset and the transmission comb offset.

The invention relates to the technical field of simulation testing, and discloses a pseudorandom sequence storage method, a pressure test method, a device and a system. The method comprises the following steps: acquiring memory information of a memory and an address of a reserved storage resource in the memory, wherein the memory information comprises the size of the memory resource of the memory; according to the size of the memory resource, generating pseudo-random binary sequence PRBS original data according to a pseudo-random binary sequence algorithm; processing the PRBS original data according to a preset clustering algorithm to generate expected data corresponding to the PRBS original data; and storing the PRBS original data and the expected data into reserved storage resources of a memory according to the address. According to the method, the PRBS data is generated in an external module mode, a PRBS module does not need to be arranged in an original hardware circuit, and the design complexity is reduced; meanwhile, by means of an external module mode of software, pseudo-random binary sequences of different orders are conveniently generated, the flexibility of generating the PRBS data is improved, and the requirements of different application scenes are met.

A position-determining system and a method for ascertaining a car position of an elevator car use a code tape mounted next to the elevator car in parallel with a movement direction and that includes a code-mark pattern of individual code marks, a detection apparatus mounted on the elevator car that detects the code marks, and an evaluation unit that determines the car position on the basis of the detected code marks. Here, n successive code marks of the code-mark pattern form a position mark, the position marks are unambiguously arranged in an n-digit pseudorandom sequence of various position marks, the position marks form a single-track code-mark pattern, and a discrete car position is assigned to each position mark. A detection region of the detection apparatus has a detection length in the movement direction that is shorter than a position-mark length of a position mark in the movement direction.

A method for reducing parasitic signal components in an output signal (360) of a sigma-delta modulator (110) is described in which the output signal (360) is generated by processing a digital input signal (310) in a signal processing path (111) of the sigma-delta modulator (110). In this case, a digital dither signal (300) is provided in the form of a pseudo-random sequence consisting of non-binary digital words (301). Furthermore, an intermediate signal (331) generated by processing the digital input signal (310) in a signal processing path (111) of the sigma-delta modulator (110) is combined with the digital dither signal (300) in order to produce a modified intermediate signal (340). The output signal (360) is then generated by processing the modified intermediate signal (340) in a signal processing path (111) of the sigma-delta modulator (110).

An apparatus comprising an antenna array including multiple planar slot antenna elements with integrated feedlines, wherein the positions, orientation angles, and feedline lengths of the antenna elements are mutually uncorrelated to produce spatial and temporal incoherence. The apparatus may include a substrate having irregular ridge faces supporting the antenna elements, a switching circuit configured to activate subsets of the antenna elements according to randomized or pseudo-random sequences, and a controller operatively coupled to the switching circuit.

This invention relates to a sensing-integrated waveform design method based on OFDM time-frequency domain phase coding, belonging to the field of wireless communication technology. In this method, the transmitting end generates a complementary Gray sequence and a pseudo-random sequence. These two sequences are then divided into blocks in the frequency domain according to their indices and phase-coded to generate a sensing waveform. A communication signal is generated through an OFDM system. The frame header of the sensing waveform is aligned with the start position of the SSB of the communication signal to generate a sensing-integrated waveform. The time slot of the transmitted communication signal is used; this waveform is the result of multiplying the communication waveform and the sensing waveform in the time domain; otherwise, the waveform is the sensing waveform. The receiving end shares the synchronization signal block and the sensing waveform. The SSB portion of the bandwidth signal is extracted from the received echo signal to estimate the time-frequency, and the echo signal is compensated. The sensing waveform is then separated from the compensated signal to reconstruct the communication signal. The waveform generated by this invention can effectively eliminate spurious peaks in the OFDM waveform, improving the sensing accuracy of the waveform without sacrificing communication performance.

The invention relates to an assembly line SAR ADC digital background calibration method based on pseudorandom sequence injection, and belongs to the technical field of analog integrated circuits. After a residual error signal is obtained through quantization of a first-stage SAR ADC, a pseudo-random sequence is injected into the residual error signal, a superposed signal is sampled and converted by a rear-stage ADC, a nonlinear error is finally caused in a digital output code, then correlation operation is carried out on an input sequence and the digital output code to obtain error information of non-ideal factors in a circuit, and the error information of the non-ideal factors in the circuit is calculated. And finally, an actual inter-stage gain value in the circuit is approximated through a variable-step iterative algorithm to be used for digital code reconstruction analog signals, and the calibration effect is finally achieved. According to the method, the influence of the step in the iteration process on the speed and the precision can be avoided, the method is used for calibrating inter-stage gain errors caused by capacitor mismatch and finite gain of an operational amplifier, better speed and precision are achieved in the calibration iteration process, the performance of the ADC is obviously improved, the signal-to-noise ratio is increased, and the spurious-free dynamic range is widened.

The invention discloses a dynamic unit matching enhanced current steering type digital-to-analog converter structure generated based on a pseudorandom sequence. The circuit is composed of a high-speed parallel-to-serial interface, a decoder, a shifter, a sampling drive circuit, a clock frequency divider, a band-gap reference circuit and a switch current unit. The digital-to-analog converter controls the shifter to perform random shifting through a random number generated by the pseudo-random sequence generator, and the randomness of input data is increased by alternately selecting traditional sequential shifting and cross shifting. According to the invention, by selecting the MOS tube type with small mismatch degree and the four-quadrant random walk layout mode, performing six-stage binary tree buffering on the clock of the sampling drive circuit, and alternately selecting the traditional sequence shift and cross shift, the mismatch degree and the time sequence deviation on the clock link caused by process manufacturing and real working environment are reduced, and the time sequence deviation on the clock link is reduced. And meanwhile, the randomization degree of data is improved, the dynamic unit matching degree is enhanced, and the method is suitable for various communication and measurement devices.

Methods, systems, and devices for wireless communication are described. A wireless device may generate an encoded pseudo-random using an encoder implementing error detection and / or error correction techniques. A bit sequence of information bits may be segmented into a plurality of bit groups, and each bit group may be mapped to a respective symbol to generate a plurality of ordered information symbols. A plurality of ordered information symbols may be encoded (e.g., by an encoder) to generate a plurality of codewords. Each codeword may be demapped to generate a plurality of sequences that are multiplexed to generate a pseudorandom sequence. A signal generated based on the pseudorandom sequence may be transmitted by a wireless device. In some examples, a wireless device may generate a reference signal based on an orthogonal or pseudo-orthogonal random sequence generated by applying an orthogonal cover code to a pseudo-random sequence.

A link training method and apparatus, which relate to the technical field of communications. The method comprises: starting a link training process for a link, wherein the link comprises at least one channel; receiving a first control frame, wherein the first control frame comprises a first training sequence; on the basis of the first control frame, locking a clock of the at least one channel, and sending a first logic layer management packet, wherein the first logic layer management packet indicates that the clock of the at least one channel has been successfully locked; receiving a second control frame, wherein the second control frame comprises a second training sequence, which comprises a pseudo-random sequence; on the basis of the second control frame, executing equalization training of the at least one channel, and sending a second logic layer management packet, wherein the second logic layer management packet indicates that the equalization training of the at least one channel has succeeded; receiving a third control frame, wherein the third control frame comprises a third training sequence, which comprises a pseudo-random sequence, and the second training sequence is different from the third training sequence; and on the basis of the third control frame, locking a data boundary of the at least one channel, and sending a third logic layer management packet, wherein the third logic layer management packet indicates a channel that has been successfully locked and / or a channel that has failed to be locked among the at least one channel.

The embodiments of the present application provide a communication signal processing method, system, electronic device and storage medium, which belong to the field of communications. The method includes: obtaining an initial signal to be sent and the number of antennas of a transmitting antenna; determining a target modulation format of the initial signal from a plurality of preset low-capture modulation formats; generating a corresponding pseudo-random sequence according to the target modulation format and the number of antennas, and using the pseudo-random sequence as header information, performing low-capture processing on the header information to obtain target header information; obtaining initial payload data of the initial signal, performing low-capture processing on the initial payload data, and obtaining target payload data; generating an initial demodulation signal mapped to each transmitting antenna, performing low-capture processing on the initial demodulation signal, and obtaining a target demodulation reference signal; performing framing processing according to the target header information, target payload data and target demodulation reference signal to generate a target signal for transmission.

This application relates to a passive optical network (PON) monitoring device and detection method, comprising: a light generation module for generating pulsed light with a pseudo-random sequence; a circulator that transmits the optical signal downlink to the optical fiber trunk and simultaneously sends the reflected uplink optical signal to a reflected light analysis module; a splitter that distributes the downlink optical signal to optical network units (ONUs) and simultaneously converges the uplink optical signal to the optical fiber trunk; and a reflected light analysis module for receiving the reflected light signal and analyzing the fault location based on the reflected light signal. This application generates pulsed light with a pseudo-random sequence through the light generation module. The pulsed light reaches each branch link via the circulator and splitter. Reflection points on each branch link reflect the pulsed light back to the reflected light analysis module, which then analyzes the fault location based on the reflected light signal. This invention can achieve high-precision resolution by controlling the pulsed light with a pseudo-random sequence, and can be used for fault detection in point-to-multipoint networks.

The invention discloses a railway power supply equipment on-line data processing system based on Internet of Things coding, and the system comprises an Internet of Things coding module which collects sensor data and obtains corresponding Internet of Things coding data, and carries out the coupling of pseudorandom sequence data based on the Internet of Things coding data and the sensor data, generating an enhanced coding label with a non-localized correlation characteristic; the optimal feature screening module is used for performing coding feature extraction on the enhanced coding tag, evaluating an importance index of a data type through a hierarchical structure model according to the coding feature, and obtaining an optimal data feature according to the importance index; the dynamic adaptive optimization module is used for acquiring a behavior feature sequence of the optimal data feature, and constructing a dynamic adaptive reinforcement learning model according to the behavior feature sequence; compared with a traditional reinforcement learning model which directly uses original data or simply processed features, the data source and features of the improved model are more unique and complex.

The invention discloses a vernier effect-based phase modulation continuous wave distance measurement method and system. The vernier effect is utilized to enhance the distance measurement capability of phase modulation continuous waves. The method comprises the following steps: selecting two pseudo-random sequences of which the lengths are prime numbers for phase modulation; splicing the two sequences into a modulation sequence, and modulating the laser signal; transmitting a modulation signal to a measured target and receiving an echo; and processing echo signals, respectively measuring time delay by using two sequences, calculating normalized time delay in combination with a code length, solving actual time delay by using the Chinese remainder theorem, and further determining a target distance. The system comprises a laser, a beam splitter, a phase modulator, a signal generator, an acousto-optic frequency shifter, a transmitting / receiving device, a beam combiner, a photoelectric detector and a signal processing module, and realizes high-precision distance measurement. The vernier effect is utilized, the unambiguous measurement distance is effectively increased, the measurement speed is improved, and meanwhile the system complexity is reduced. By combining a precise signal processing algorithm, the actual distance between the measured target and the measuring device can be accurately and quickly calculated, and the method is suitable for high-precision and long-distance distance measurement requirements and has wide application prospects.

The invention relates generally to the radio navigation field and may be applied to design of Global Navigation Satellite System (GNSS) Receivers, and particularly of GNSS GPS (USA), Galileo (EU), Glonass (Russia), Beidou (China), QZSS (Japan), IRNSS (India), and augmentation systems SBAS (different states). In the invention, the function of generating various PRN codes is repositioned from numerous tracking channels of multi-frequency, multi-constellation GNSS receiver to a shared PRN code generator unit, which serves in series all tracking channels. Such centralization of the PRN codes generation function enables a significant complexity reduction when the GNSS receiver includes a great number of tracking channels. A sufficient speed performance of the shared PRN code generator is achieved due to transfer of the PRN code lines from the shared PRN code generator to the receiver tracking channels via a dedicated parallel bus. Speed performance requirements to the dedicated parallel bus of the shared PRN code generator is kept moderate by a special number of symbols choice of PRN code lines thus providing uniformity of tracking channels requests to get new code lines. Use of several alternate means of PRN code lines forming: PRN Code ROM, PRN Code RAM, LFSR-based and one-shot PRN code generators - permits choosing optimal generation means for each type of GNSS signals.

A frequency change synchronization method in a self-adaptive frequency change communication system comprises the following steps: firstly, carrying out hierarchical division on available frequency points, and determining the available frequency points and cluster head frequency points through electromagnetic spectrum sensing and intelligent decision; secondly, generating two-stage pseudo-random sequences for the available frequency points, forming synchronous frames, and sending the synchronous frames on the cluster head frequency points according to specific duration and frequency; and a receiver receives and analyzes available frequency points by adopting a two-stage parallel capture mechanism, so that frequency conversion synchronization is realized. The method has the advantages of being high in synchronization speed, high in adaptability, easy to implement and the like, can effectively improve the reliability and the real-time performance of the self-adaptive frequency hopping communication system in the interference environment, and is suitable for various communication application scenes.

The present invention relates to a method for protecting a sensitive data sequence within an integrated circuit. The method comprises generating a pseudorandom sequence based on a seed sequence stored in the integrated circuit, combining the sensitive data sequence and the pseudorandom sequence to generate a protected data sequence, and storing the protected data sequence in the integrated circuit. The protected data sequence cannot be accessed from outside the integrated circuit.

The present invention relates to the field of coding, and more particularly to an improved Festel-based encryption method for EPC codes of aircraft equipment. The method comprises the following steps: S1, mapping the aircraft equipment code to the EPC code; S2, encrypting the aircraft equipment EPC code using the improved Festel network, including the following substeps: S21, segmenting the EPC code into scrambling, left, and right halves; S22, generating a pseudorandom sequence using a pseudorandom number generator; S23, obtaining a binary number as a round key based on the pseudorandom sequence; and S24, iterative encryption to obtain a final encrypted result. The present invention maps traditional aircraft equipment codes to EPC codes and encrypts them using the improved Feistel network. This method not only enhances information uniformity and traceability, but also ensures data security while preserving the standard format of the EPC code.

The invention discloses an electrosurgical tissue impedance measurement system and method based on frequency domain analysis. The system comprises a main energy generation module, a modulation signal generation module, an output superposition module, a signal acquisition module, an impedance calculation module and a feedback control module. The main energy generation module outputs a high-frequency main waveform for tissue cutting or blood coagulation; the modulation signal generation module is used for generating a modulation signal, and the modulation signal comprises one of a multi-cosine signal or a multi-frequency sweep-frequency signal and a pseudo-random sequence; the output superposition module is used for superposing the modulation signal into the main waveform; the signal acquisition module synchronously acquires tissue voltage and current signals after the modulation signal is loaded; the impedance calculation module is used for performing frequency domain analysis on the voltage and current signals acquired by the signal acquisition module, extracting frequency components corresponding to modulation signals by using fast Fourier transform (FFT), phase lock detection (PLL) or a time-frequency analysis algorithm, and performing frequency domain analysis on multi-cosine signals or frequency sweep signals; by comparing the amplitude ratio and the phase difference of the corresponding frequency components of the modulation signal output end and the response end, the impedance Z = RZ < Z of the measured tissue is inverted according to the known reference impedance, and Z is the impedance of the measured tissue; rZ is the amplitude of the measured impedance and reflects the magnitude of the impedance; < Z represents the phase difference between the voltage and the current; for a pseudo-random sequence signal, a matched filter is used for carrying out related detection on an input signal, and a pseudo-random sequence value is extracted so as to obtain a system signal and control data; a feedback control module adjusts the output power or the cutting / coagulation mode of the electrosurgical equipment in real time according to the tissue impedance obtained through calculation and the dynamic change of the tissue impedance; wherein the dynamic change is a group of dynamic sequence values of the impedance of the measured tissue from the time dimension. By means of the design, real-time accurate measurement can be achieved, the anti-interference capability is high, errors are small, and efficient and safe cutting / blood coagulation can be achieved.

The invention relates to a cable diagnosis method and chip for an industrial field bus, and the method comprises the steps: generating a pseudorandom sequence at a transmitting end, converting the pseudorandom sequence into an analog signal, and injecting the analog signal into a to-be-detected cable; providing the pseudo-random sequence as a reference sequence to a receiving end; a receiving end collects echo signals on the cable, and samples and converts the echo signals into a sampling sequence; executing a peak detection process, including: estimating a channel impulse response through an iterative correlation estimation method based on the sampling sequence and the reference sequence, the channel impulse response including a discrete coefficient vector; detecting a peak value meeting a preset condition from the channel impulse response; and determining the fault type of the cable according to the symbol and amplitude of the detected peak value, and / or calculating the fault position on the cable according to the position of the peak value in the channel impulse response. The industrial field bus cable fault diagnosis method is suitable for diagnosis of industrial field bus cable faults in a complex electromagnetic measurement environment.

The present invention relates to a target acquisition method and system for a steerable light beam in an optical wireless communication or free space optical communication system, in which the duration during which the steerable light beam of a transmitter must illuminate a light detector at a receiver for acquisition can be minimized, and may allow a slow feedback channel from a receiver to a transmitter. This can be accomplished by transmitting a pseudorandom sequence having the attribute that knowledge of a small number of bits uniquely allows determination of the beam direction in which the steerable beam of the transmitter is received by the receiver. In one example, a linear feedback shift register sequence is a suitable and very efficient choice.

The invention discloses a time jitter covert communication waveform design method, which relates to the technical field of anti-interference, and comprises the following steps: based on a first pseudo random sequence, combining effective information and pseudo information to form modulation information; selecting a corresponding Chirp signal from the baseband waveform sample memory based on the second pseudorandom sequence; modulating the Chirp signal, the baseband signal and the modulation information to generate a baseband modulation signal; and performing up-conversion processing on the baseband modulation signal, generating a transmitting signal, and transmitting the transmitting signal from a transmitting end, so as to solve the problems of weak concealment and weak anti-interception capability of the current common covert communication architecture.

The invention discloses a DNA (deoxyribonucleic acid) storage method based on data superposition pseudorandom sequence index, which comprises the following steps of: firstly, performing exclusive OR on a pseudorandom sequence and a sparse coding sequence to generate an addressable short fragment oligonucleotide sequence; then, by using the superposed pseudo-random sequence as an index, correlating the pseudo-random sequence hidden in the sequencing read with the known pseudo-random sequence at the boundary of each pseudo-random sequence by using a small sliding window to realize quick positioning of the read so as to determine the position of the read on the whole pseudo-random sequence; and finally, reconstructing a sparse coding sequence by adopting a majority voting algorithm, and realizing error-free recovery of data through sparse code decoding and iterative decoding. The method has the advantages that sequence positioning can be achieved only through correlation operation at the boundary of each pseudo-random sequence, local label sequences do not need to be added to oligonucleotide molecules, data recovery performance reduction caused by label sequence damage, sequence breakage and the like is avoided, and rapid data recovery can be achieved under low sequencing coverage.

The embodiment of the invention discloses a satellite network data sending method. Comprises: acquiring a satellite load data packet; establishing data frames corresponding to the satellite load data packet, wherein the data frames comprise a first signal-to-noise ratio data frame, a second signal-to-noise ratio data frame and a third signal-to-noise ratio data frame; sending the data frame to a receiving end, and processing the data frame to obtain a satellite load data packet; the ranges of working points of the first signal-to-noise ratio data frame, the second signal-to-noise ratio data frame and the third signal-to-noise ratio data frame are greater than or equal to-15dB and less than-10dB, greater than or equal to-10dB and less than 0dB, and greater than or equal to 0dB and less than 20dB; the first signal-to-noise ratio data frame comprises a plurality of sub-first signal-to-noise ratio data frames, and the frame length of the sub-first signal-to-noise ratio data frames is the same as the frame length of the second signal-to-noise ratio data frame and the frame length of the third signal-to-noise ratio data frame; the unique code domain of the frame header of the first signal-to-noise ratio data frame, the unique code domain of the frame header of the second signal-to-noise ratio data frame and the unique code domain of the frame header of the third signal-to-noise ratio data frame are selected from a pseudorandom sequence set.

The application relates to a microcomputer video information protection method and system based on variable sequence related interference, which specifically comprises the following steps: collecting an original video signal and calculating a video timing parameter; configuring a multiple clock source frequency according to a line frequency, generating and dynamically rearranging an initial pseudo-random sequence to obtain a variable sequence related interference signal; identifying a scanning interval, generating a digital scrambling pulse during a forward stroke and superimposing the variable sequence related interference signal to generate a time domain scrambling composite signal, and attenuating the variable sequence related interference signal to generate the time domain scrambling composite signal during a reverse stroke; generating a wideband white noise signal, mixing the wideband white noise signal with the time domain scrambling composite signal to obtain a full-band mixed interference signal; generating an envelope modulation waveform, and amplitude modulating the full-band mixed interference signal to generate a simulation video radiation interference signal; collecting a real-time radiation intensity adjustment gain and outputting a target interference emission signal; collecting a power line conduction leakage signal, and generating an inverse filtering signal to offset the power line conduction leakage signal. The application improves the security of microcomputer video information.