882 results about "Phase noise" patented technology

The invention relates to the technical field of semiconductors, and discloses a full-temperature-zone polynomial digital temperature compensation method and system based on an SOI chip, and the method comprises the steps: obtaining the temperature frequency data of a preset temperature zone of a target SOI chip, fitting a full-temperature-zone curve, extracting a critical point of the temperature zone, dividing a segmented compensation interval according to the critical point, and obtaining the temperature frequency data of the preset temperature zone of the target SOI chip; the method comprises the following steps: calculating frequency drift amounts under different voltages to construct a full-automatic test framework, acquiring an environment temperature parameter and an instantaneous temperature value by using the framework, analyzing a temperature compensation vector of a segmented compensation interval, further monitoring a signal frequency interval output by a chip, extracting a phase noise parameter, calculating a frequency offset error amount with a preset value, and calculating the frequency offset error amount. And analyzing an error source, optimizing a polynomial compensation order, and collecting temperature drift suppression data to generate a full temperature region compensation report. According to the invention, the performance stability of the chip in a complex environment can be improved.

The invention provides a broadband tunable low-phase-noise photo-generated microwave signal source and device, and relates to the technical field of photo-generated microwaves. According to the invention, a low-frequency optical pulse and a high-frequency microwave signal are respectively input into the electro-optical sampling phase-locked loop; and the electro-optical sampling phase-locked loop determines the synchronization error of the optical pulse and the microwave signal based on the phase difference between the optical pulse center point and the microwave signal zero crossing point. And taking the synchronization error as a feedback signal, and continuously adjusting the frequency and the phase of the microwave signal by the voltage-controlled oscillation module until the frequency and the phase are synchronized with the Nth harmonic of the optical pulse. By setting different initial frequencies of the voltage-controlled oscillation module, microwave signals with different integral multiple optical pulse frequencies can be obtained, and broadband tuning of photo-generated microwave signals is realized. Furthermore, the repetition frequency of the frequency comb is locked through beat frequency of two beams of reference laser and two adjacent comb teeth, the stability of the reference laser is transmitted to the optical pulse, and the stability of the reference laser is further transmitted to the microwave signal through synchronization of the optical pulse and the microwave signal, so that the phase noise of the photo-generated microwave signal source is reduced.

The invention discloses a low-phase noise ring voltage-controlled oscillator based on multiphase injection locking, relates to the technical field of integrated circuits, and is used for solving the technical problems that an existing injection locking oscillator limits the frequency tuning range and cannot effectively suppress noise. The invention discloses a low-phase noise ring voltage-controlled oscillator based on multiphase injection locking. The low-phase noise ring voltage-controlled oscillator comprises a first ring oscillator unit and a second ring oscillator unit, the n first ring oscillator units are connected in series to form a chain structure; the second ring oscillator unit is provided with a cross coupling inverter complementary injection unit and a tail current source injection unit; a first output end of the chain structure is connected with a second input end of the second ring oscillator unit, and a second output end of the chain structure is connected with a first input end of the second ring oscillator unit; a first signal is injected into a cross-coupling inverter complementary injection unit and a tail current source injection unit, and a second ring oscillator unit receives a second signal output by a chain structure and then outputs a third signal.

A PTRS sending method and receiving method and a communication apparatus. The method includes: a terminal device sends first information to a network device, receives first indication information from the network device, and sends a DFT-s-OFDM symbol to which a PTRS is mapped to the network device. In the method, a rule for mapping the PTRS to a plurality of layers of the DFT-s-OFDM symbol is specified, to ensure phase noise estimation performance and improve a demodulation capability.

The invention relates to the technical field of communication, and discloses a network communication chip signal interference suppression processing method. The method comprises the following steps: acquiring a local oscillator phase jitter sequence in real time through an on-chip phase noise monitoring unit; estimating Doppler frequency shift and channel coherence time based on the sequence; dynamically adjusting the closed-loop bandwidth of the phase-locked loop; and generating a phase compensation signal, and performing time-varying channel minimum mean square error equalization in combination with a received baseband signal to eliminate inter-symbol interference. The system integrates a phase noise monitoring function module, a channel parameter estimation function module, a phase-locked loop bandwidth regulation function module, a phase compensation generation function module and an interference joint elimination function module. By means of dynamic bandwidth reconstruction and high-precision phase compensation, the bit error rate under high-speed movement is remarkably reduced, the 5G millimeter wave communication standard requirement is met, and the method has the advantages of being achieved on a whole chip, low in delay and high in robustness.

A dual path PLL provides excellent output phase stability over PVT variations, without implementing a high accuracy TDC. A digital integral path employs a binary phase detector, comparing the reference and feedback signals, and an integrator to generate an oscillator control input to lock the long-term output phase to the reference signal. An analog proportional path employs a linear (e.g., edge triggered) phase detector and a charge pump and filter to generate an oscillator control input to mitigate phase noise in the output signal. The feedback signal to the proportional path is delayed, which has the effect of increasing the width of phase error pulses, and moving the charge pump operating point away from the zero point where it generates both positive and negative currents, which are difficult to match. A second linear phase detector in the proportional path compensates for the increased phase error pulse width by comparing the delayed and non-delayed feedback signals, and generating pulses in the opposite direction.

The invention relates to the technical field of optical communication, and discloses a multi-dimensional and multi-phase-based 50G PON signal noise compensation method, which comprises the following steps: S1, generating a mixed signal, including superposing a multi-phase orthogonal pilot signal into a data signal time domain at a transmitting end according to a preset proportion lower than the power of a data signal; and S2, transmitting the mixed signal in a polarization multiplexing mode, wherein the polarization multiplexing adopts double-channel parallel transmission of an X polarization state and a Y polarization state. Multi-phase orthogonal pilot signals are superposed to a data signal time domain in a low-power proportion at a transmitting end, polarization multiplexing dual-channel transmission is adopted, a narrow-band filter is utilized at a receiving end to separate pilots and calculate channel damage parameters, and a finite impulse response filter is configured to perform linear equalization compensation. And the simplified Kalman filtering algorithm is combined to estimate the phase noise and correct the phase, so that collaborative suppression of the linear channel damage and the phase noise in the 50G PON signal is facilitated.

The invention discloses a cloud wireless access network millimeter wave signal optimization method based on machine learning, which adopts a double-ring OEO to replace a traditional radio frequency signal source, improves phase noise and improves signal stability. Meanwhile, the gain behavior of the millimeter wave signal is modeled by using a BiLSTM network, and high-precision power prediction is realized by combining the DML chirp effect and the influence of optical fiber dispersion. Besides, the BiLSTM model is optimized through the ACO algorithm, the optimization weight can be flexibly adjusted according to different communication scene requirements, and millimeter wave signals meeting the requirements are generated.

The invention discloses a vibration phase bit coding test method and device based on a graphene parameter resonator, and relates to the technical field of resonators. The method comprises the following steps: applying an initial bias voltage and a parameter excitation signal, and setting the driving frequency of the parameter excitation signal to be twice of the resonant frequency corresponding to the initial bias voltage; continuously increasing the parameter excitation signal until the resonator enters a parameter vibration state; applying a direct driving signal, and setting the driving frequency of the direct driving signal as the resonant frequency corresponding to the initial bias voltage; selecting bias voltage values on two sides of the initial bias voltage, and scanning from low to high and from high to low to obtain vibration phase change; and obtaining the vibration phase bit code of the to-be-measured graphene parameter resonator according to the vibration phase change. Information is stored through mechanical vibration of the graphene parameter resonator instead of utilizing charge or electron spinning, electromagnetic interference and phase noise are effectively avoided, and the graphene parameter resonator is more stable at high temperature and suitable for a high electromagnetic noise environment.

The embodiment of the invention provides a communication method and a related device. The communication method and the related device can be applied to communication integrated application scenes such as low-altitude security, smart traffic, smart home, social governance and smart medical treatment. In the method, a transmitting side indicates a multiplexing relationship between a demodulation reference signal (DMRS) port and a sensing port through first information, and a first resource unit corresponding to the DMRS port and a second resource unit corresponding to the sensing port are overlapped on a frequency domain resource. And transmitting second information containing a first phase noise tracking signal (PTRS) and a sensing signal, the first PTRS being on an overlapping resource unit. Therefore, the multiplexing of the PTRS and the sensing signal is realized, namely, the sensing function is met while the phase noise estimation of the communication link is realized.

The invention belongs to the technical field of satellite communication, and provides a phase noise prediction and compensation method and device for a high-order satellite communication system, and the method comprises the steps: obtaining a receiving signal corresponding to an original signal transmitted by a transmitting end; wherein a known pilot symbol is inserted into the original signal; determining a theoretical fine compensation phase and a Doppler forecast value of the first two received symbols in the received signal, constructing a feature vector, and performing phase coarse compensation on the received signal according to the feature vector to obtain a first compensation signal; wherein the receiving symbols comprise pilot frequency symbols and non-pilot frequency symbols; determining a historical phase value and an environment key parameter, and inputting the historical phase value and the environment key parameter into a pre-constructed phase noise prediction model to obtain a fine compensation phase value; and performing phase fine compensation on the first compensation signal according to the fine compensation phase value to obtain a second compensation signal. According to the scheme provided by the invention, phase noise interference can be effectively suppressed, and the stability and reliability of a high-order satellite communication system are improved.

The invention belongs to the technical field of distributed optical fiber sensing, and relates to a coding difference phase noise and distortion cooperative suppression optical frequency domain reflection method, which comprises the following steps: acquiring upper and lower frequency sweeping and beat frequency signals; separating the upper and lower sweep-frequency beat-frequency signals to obtain an upper sweep-frequency beat-frequency signal and a lower sweep-frequency beat-frequency signal; acquiring an upper sweep frequency beat frequency electric signal and a lower sweep frequency beat frequency electric signal; and the upper frequency-sweeping beat-frequency electric signal is delayed by one spatial resolution and then is mixed with the lower frequency-sweeping beat-frequency electric signal, or the lower frequency-sweeping beat-frequency electric signal is delayed by one spatial resolution and then is mixed with the upper frequency-sweeping beat-frequency electric signal, a frequency-mixing signal after phase frequency noise and frequency domain distortion suppression is obtained, and the Fourier frequency domain spectrum of the frequency-mixing signal is analyzed. The invention also provides a coding difference phase noise and distortion cooperative suppression optical frequency domain reflection system. The system comprises a positive and negative double-sideband sweep frequency light acquisition device, an optical splitter, a spectrum spreading device, an interference device, a beat frequency signal acquisition device and an electric delay unit. According to the invention, phase noise and frequency domain distortion noise can be effectively suppressed.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) with phase noise (PN) suppression capabilities may indicate, to a network node, a quantity of subcarriers corresponding to an assumed PN bandwidth (for example, a portion of a frequency spectrum in which the UE can estimate and cancel PN) and a residual error associated with the assumed PN bandwidth. In some aspects, the network node may then configure a phase tracking reference signal (PTRS) size (for example, a quantity and location of PTRS pilots) according to current the PN suppression capability of the UE. Furthermore, in cases where the UE changes the current PN suppression capability, the UE may indicate the updated PN suppression capability to the network node such that the PTRS size be appropriately updated for subsequent downlink transmissions.

An electronic device may include wireless circuitry having an oscillator. The oscillator can include a first transistor having a source-drain terminal coupled to a tail node, a second transistor having a source-drain terminal coupled to the tail node, a first coil having a first terminal coupled to the tail node and having a second terminal coupled to a power supply line, and a second coil inductively coupled to the first coil. The first and second coils can be part of a balun. The balun can be coupled to a tunable capacitance. The tunable capacitance can include multiple differential switchable capacitor circuits. The balun and the tunable capacitance can form a balun phase noise filter configured to reduce a phase noise associated with the oscillator.

The invention provides a physical frame structure design method suitable for satellite-ground high-order high-bit-rate wireless communication, which comprises the following steps of: slicing service data according to a preset length, and generating a baseband frame based on the obtained data slices; performing scrambling processing on the baseband frame to obtain a scrambled baseband frame; sequentially executing preset error correction coding processing on the scrambled baseband frames to obtain coded frames; performing internal interleaving processing on the coding frame to obtain internal interleaving data, and forming a first physical frame; performing external interleaving processing on the first physical frame to obtain external interleaving data; mapping the outer interleaved data into a symbol stream; performing physical frame framing based on the symbol stream to obtain a second physical frame; and performing scrambling processing on the to-be-scrambled symbols except the physical frame header in the second physical frame to obtain a scrambled physical frame, and performing modulation based on the scrambled physical frame to perform data transmission, thereby improving phase noise resistance and channel distortion resistance, enhancing Doppler frequency shift resistance, and optimizing transmission efficiency and reliability.

The invention discloses a phi-OTDR vibration demodulation method based on double-segment average phase difference, belongs to the technical field of optical fiber sensing vibration demodulation, and solves the problems that in the prior art, phase demodulation is greatly influenced by phase noise such as laser frequency drift, the phase extraction precision and the signal-to-noise ratio are low due to random fluctuation of a phase curve, and the signal-to-noise ratio is low. And phase solving errors are easily caused by interference fading points. According to the method, through band-pass filtering, moving differential positioning, I / Q demodulation after reference point selection, unwinding, mean value removal and calculation of the average phase difference of two segments, the phase variation corresponding to vibration is extracted, and the demodulation precision is improved. Through the two-segment average phase difference method, the influence of phase noise and interference fading is suppressed, and the signal-to-noise ratio and stability of phase demodulation are improved; the frequency modulation pulse is replaced to break through restrictions of spatial resolution and sensing distance, high sidelobe suppression can be realized without windowing the NLFM pulse, the signal-to-noise ratio is not damaged, and the vibration detection positioning accuracy is improved.

The invention relates to the technical field of microwave photonics, and discloses a full-band noise microwave source system and a microwave signal generation method. An optical reference unit is used for generating an optical reference signal; the photoelectric phase detection unit is connected with the optical reference unit and is used for receiving the optical reference signal and a feedback signal sent by the microwave oscillation unit and outputting a beat frequency electric signal for reflecting a phase error; the servo control unit is connected with the photoelectric phase detection unit and the microwave oscillation unit and is used for separating the beat frequency electric signal into a low-frequency control signal and a high-frequency control signal; the microwave oscillation unit is connected with the servo control unit and outputs a target microwave signal in response to the low-frequency control signal and the high-frequency control signal. A beat frequency electric signal is separated into a low-frequency path and a high-frequency path by using the servo control unit, so that targeted suppression of phase noise of different frequency bands in a single signal source is realized.

The invention relates to the technical field of radio frequency integrated circuits, and discloses a low-noise voltage-controlled oscillator circuit which comprises a source electrode following low-noise bias circuit with digital calibration, a source electrode following low-noise bias circuit with digital calibration, a source electrode following low-noise bias circuit with digital calibration and a source electrode following low-noise bias circuit with digital calibration, the cross-coupled amplifier array is composed of a plurality of units, and the source electrode of the cross-coupled amplifier array suppresses low-frequency noise through a resistance-capacitance feedback network and receives a digital amplitude calibration signal so as to dynamically adjust the number of working units and stabilize the output amplitude; the amplitude self-calibration loop consists of digital logic and a peak detector; the switched capacitor unit array is provided with stable direct-current bias; and a wide linear variable capacitor array driven by the stepped bias voltage. Through deep fusion of digital and analog technologies, the phase noise is remarkably reduced, the linear tuning range is widened, the amplitude stability is ensured, the power consumption is reduced, and the method is particularly suitable for a high-performance radio frequency communication chip of the Internet of Things.

The invention belongs to the technical field of distributed optical fiber sensing, and relates to a phase-frequency noise suppression optical frequency domain reflection measurement method and system without an auxiliary interferometer. The measurement method comprises the following steps: acquiring positive and negative double-sideband sweep-frequency light with the same sweep-frequency range and opposite sweep-frequency directions; dividing the positive and negative double-sideband sweep frequency light into double-sideband detection light and double-sideband local oscillation light according to a preset proportion; configuring a pseudo-random noise code, and modulating the pseudo-random noise code to the double-sideband probe light to obtain spread spectrum double-sideband probe light; the spread spectrum double-sideband detection light enters the sensing optical fiber and is reflected back to the backward Rayleigh scattering light, and the backward Rayleigh scattering light and the spread spectrum double-sideband local oscillation light interfere with each other to output up-down sweep frequency beat frequency signals; separating the upper and lower sweep-frequency beat-frequency signals to obtain an upper sweep-frequency beat-frequency signal and a lower sweep-frequency beat-frequency signal; and after the upper sweep frequency beat frequency signal and the lower sweep frequency beat frequency signal are respectively decoded, a beat frequency signal is separated through band-pass filtering, the beat frequency signal is subjected to frequency mixing processing to obtain a frequency mixing signal after phase frequency noise suppression, and the frequency spectrum of the frequency mixing signal is analyzed.

Phase noise reduction is described for symmetric bistatic radar. In one example, a first beat signal is generated of a second signal received at a first antenna and a third beat signal is generated at a second antenna of a first linear antenna array. A second beat signal is generated of a first signal received at a first antenna of a second linear antenna array. The first beat signal and the third beat signal are multiplied with the complex conjugate of the second beat signal to generate products that are combined to generate a phase estimation correction term that is applied to first and second sets of radar return signals.

Aspects of the present application provide methods and devices for a phase tracking reference (PT-RS) scheme for use by a single carrier Offset QAM (SC-OQAM) transmitter and receiver to estimate, and correct, phase errors that occur over the communication link between the SC-OQAM transmitter and receiver. A transmitter may set the sign (positive or negative) of PT-RS symbols dynamically allowing the transmitter to better utilize IQ interference caused by data symbols and other PT-RS symbols. Another aspect of the present disclosure provides a receiver that can estimate phase error due to phase noise without knowing the sign of PT-RS symbol or the sign of IQ interference. This type of phase error estimation improves the phase noise estimation performance, and thus may improve the overall block error rate (BLER) performance at the receiver.

Embodiments of the present invention relate to a system and method for monitoring optical communication channel during data transmission using a quantum measurement. Embodiments in accordance with the present invention is capable of estimating channel loss and added phase noise based on the quantum properties of faint light. All measurements utilizing system and method in accordance with embodiments of the present invention are local to the receiver, and additional information (or physical states) exchange between transmitter and receiver is not required.

The invention relates to the technical field of terahertz signal receiving, in particular to a photo-generated local oscillator multi-band tuning millimeter wave mixing receiver device. The device comprises an antenna, a photo-generated local oscillator circuit, a broadband coherent frequency mixing circuit, a baseband signal processing platform, a PC control end and a time division multi-frequency tuning module. By introducing a photo-generated local oscillator technology, a millimeter wave local oscillator signal with high frequency, stability and low phase noise is obtained, and the adaptability of the system to multi-band and cross-band signals is improved. By adopting the broadband coherent odd harmonic mixer with the fin line structure, high-efficiency mixing of a radio frequency signal and a local oscillator signal is realized, and the broadband coherent odd harmonic mixer has the advantages of broadband, high-efficiency odd mixing, low loss, compact integration and the like. On the basis, a time division multi-frequency tuning technology is adopted, and dynamic tuning and switching of multi-frequency-band signals are achieved in a single receiving framework. According to the invention, the problems of frequency band switching bottleneck and multiplexing loss in a traditional multi-frequency receiving system are solved. The antenna has the advantages of being compact in structure, capable of covering multiple frequency bands, suitable for multi-frequency-band observation requirements in a high-sensitivity radiometer system and the like.

The invention provides a spread spectrum fractional frequency division control circuit, a fractional frequency division phase-locked loop and a chip, the spread spectrum fractional frequency division control circuit comprises a spread spectrum circuit, a signal modulator and a frequency division control signal output circuit, and the spread spectrum circuit correspondingly processes a superposition result according to a corresponding spread spectrum mode. According to the technical scheme of the invention, the method comprises the following steps of: adding a first frequency division control signal to a frequency division circuit to obtain a corresponding first frequency division control signal, and processing the superposition result in a non-spread-spectrum mode and different spread-spectrum modes (including a central spread-spectrum mode and a downward spread-spectrum mode) by the spread-spectrum circuit is different, so that the non-spread-spectrum mode and the different spread-spectrum modes can be supported by the technical scheme of the invention; and an effective spectrum spreading function can be kept when the fractional frequency division ratio is close to 0 or 1, so that a good phase noise suppression effect is achieved while high frequency and high resolution are completed, and relatively high flexible configuration capability is provided.

The invention provides a phase-sensitive optical time domain reflectometer system and method, and the system comprises a first polarization-maintaining coupler which is used for dividing laser generated by a DC laser, and obtaining first laser and second laser; the optical fiber measurement front-end module is used for processing the random signal through pulse shaping and multi-carrier modulation technologies to generate an electric signal, and sequentially performing modulation, amplification, Rayleigh scattering and amplification on the first laser after the electric signal is generated to obtain amplified Rayleigh backscattered light; the second polarization-maintaining coupler is used for dividing the second laser to obtain third laser and local oscillation light; the delay optical fiber is used for processing the third laser to obtain delay light; the third polarization-maintaining coupler is used for combining the delayed light and the amplified Rayleigh backscattered light to obtain combined light; the receiver is used for processing the combined light and the local oscillation light to obtain multiple paths of target electric signals; and the oscilloscope is used for processing multiple paths of target electric signals through low-pass and high-pass filters and a phase noise compensation algorithm so as to determine power and phase distribution. The system cost can be reduced.

The invention relates to a small frequency source module with low phase noise, which is applied to the technical field of frequency sources, and comprises a dual-redundancy reference source unit, a dynamic temperature compensation unit, a frequency synthesis unit, an intelligent switching control unit and a structure protection unit, the main reference source module and the standby reference source module both adopt MEMS resonators with the Q value not smaller than 10000, the dynamic temperature compensation unit is used for dynamically adjusting the output frequency of the resonators according to the temperature, and the intelligent switching control unit is used for controlling switching between the main reference source module and the standby reference source module; through collaborative design of the high-Q-value MEMS resonator, dynamic temperature compensation and dual-redundancy intelligent switching, the problems of large size, high phase noise, large temperature drift and low reliability of a traditional frequency source module are solved, miniaturization design is realized, and strict requirements of scenes such as communication equipment and a navigation system on miniaturization can be met.

The invention discloses a four-core F23 type millimeter wave voltage-controlled oscillator based on an intra-core common mode technology. The voltage-controlled oscillator comprises a three-coil coupling four-core class-F inductor and four voltage-controlled oscillator cores. The three-coil coupling quad-core class-F inductor comprises eight differential ports, four ports are connected with a grid electrode of a core negative resistance tube of the voltage-controlled oscillator, and the other four ports are connected with a drain electrode of the core negative resistance tube of the voltage-controlled oscillator. The negative resistance tubes of the four voltage-controlled oscillator cores are formed by NMOS tubes and PMOS tubes in an alternating mode. The voltage-controlled oscillator is in an F-type working state for differential mode current so as to improve phase noise; noise filtering is performed on the common-mode current through an intra-core natural common-mode path. According to the invention, millimeter wave frequency output with low phase noise can be realized in a compact layout.

The invention relates to the field of electronic circuit design, and discloses a numerical control crystal oscillator circuit with low noise and high stability. According to the circuit, a two-stage voltage regulator is adopted to suppress power supply noise, wide-range high-precision frequency regulation is realized through thick and thin capacitor array regulation, oscillation signal quality is ensured through automatic detection feedback and external programming double-loop control, and a special oscillation starting circuit is arranged to accelerate the starting process of a crystal oscillator. Meanwhile, targeted optimization is carried out on a core circuit and layout in the loop, and noise and distortion are further reduced. The digital controlled oscillator can effectively solve the problems that an existing digital controlled oscillator scheme is narrow in frequency modulation range, large in phase noise and the like, the characteristics of low noise, high stability, rapid starting and the like are achieved, an excellent frequency reference is provided for a wireless communication and high-precision timing system, and the digital controlled oscillator has remarkable practical value.

The invention relates to a Bragg light generation system and method suitable for a Bragg atom interferometer, and the system comprises a laser device which is used for generating first laser with the frequency on a preset atomic absorption peak frequency band; the optical circulator is used for transmitting the first laser to the cascade acousto-optic modulator and receiving two beams of third laser returned by the cascade acousto-optic modulator; the cascade acousto-optic modulator is used for diffracting the first laser into two beams of second laser with opposite propagation directions through Bragg diffraction of the two acousto-optic crystals; the optical assembly is used for carrying out secondary diffraction on the two beams of second laser and reflecting the two beams of second laser which are obtained through diffraction and are perpendicular to each other to the cascade acousto-optic modulator; and the output module is used for carrying out light splitting sampling on the two beams of third laser and modulating the sampled third laser into Bragg laser of a target frequency band. According to the invention, path separation of the two Bragg laser beams is reduced through quasi-common-path, so that phase noise is reduced, and measurement precision is improved.

The embodiment of the invention provides a blade tip timing non-contact measurement method and system based on laser interference, belongs to the technical field of blade tip monitoring, and solves the problems that an existing method depends on an advanced signal processing algorithm to extract vibration characteristics, but cannot solve the problems of high-frequency signal aliasing, phase noise suppression and multi-target crosstalk. The method comprises the steps that a high-bandwidth photoelectric detector is used for responding to and obtaining an interference signal, and self-adaptive phase solution and timestamp capture are conducted on the interference signal based on a self-adaptive phase unwrapping method in combination with a dynamic signal compensation mechanism. According to the method, the interference signals are processed on the basis of the self-adaptive phase unwrapping method in combination with a dynamic signal compensation mechanism, signal phase solution information can be effectively extracted, noise is effectively suppressed, multi-blade signal crosstalk is separated, and the method is suitable for being applied to the field of multi-blade multi-modal parameter identification and analysis. And more accurate blade tip multi-modal parameters are obtained.