最新刊期
卷 36 ， 期 9 ， 2008
- 摘要：The best image fusion system in real world is human vision.If we can know the biological machine and build its mathematic model,it will be very useful in application.In this paper,we describe the biological knowledge of human eyes,such as receptive field.And a new image fusion algorithm based on human vision model is presented.This method is suitable to fuse two images with different gray levels from different sensors.While all useful information in original images can be observed in fused images,the differences of two images are enhanced.The enhancement helps the observer to recognize the objects correctly and quickly.Additionally,this algorithm reduces the noise in original images and has low calculation cost.It can satisfies the real time requirement.关键词：image fusion;receptive field;human vision2|1390|1更新时间：2025-07-16
- 摘要：We propose a robust phase unwrapping method to coregistration error for multibaseline InSAR systems.In the method,the optimal joint data vector is determined by the direction of the coregistration,the true steering vector with large coregistration error is computed according to the data vector,and then the beamforming technique with the steering vector is used to unwrapping the InSAR interferometric phase.The method can carry out image coregistration,interferometric phase noise filtering and phase unwrapping simultaneously.Computer simulation results show that the method can provide accurate estimate of the absolutely interferometric phase even when the coregistration error reaches one pixel.关键词：interferometry synthetic aperture radar (InSAR);coregistration error;multibaseline;phase unwrapping;optimal joint data vector;true steering vector2|816|4更新时间：2025-07-16
- 摘要：Phase correction may seriously affect the ultimate focusing and imaging quality of inverse synthetic aperture radar(ISAR).Due to the explicit algorithm principle and moderate computation amount,Doppler centroid tracking(DCT)method is a well-used phase correction method of ISAR.However,the performance of DCT is normally unsatisfactory when the target has strong scatterers.Based on the analysis and comparison of existing methods,the image-domain balancing is proposed to modify DCT method in this paper.By using the simple operators of balancing and feedback,the proposed method may dramatically reduce the effect of strong scatterers and improve the robustness and the ultimate imaging quality.Finally,the performance analysis and imaging results of several kinds of real target are also provided to demonstrate the effectiveness of the proposed method.关键词：inverse synthetic aperture radar(ISAR);phase correction;doppler centroid tracking;image-domain balancing2|1251|1更新时间：2025-07-16
- 摘要：Channel balance is the prime problem for target parameters estimation and location.We focus on channel mismatch and target signal contamination which preclude the performance described in much of the theoretical space-time adaptive processing (STAP) literature.Exploring phase relation among along-track Doppler beam sharpening (DBS) images,a channel calibration algorithm based on second order moments of phase vector is presented.The effectiveness for channel mismatch and the robustness for target signal contamination are confirmed by performance analysis and experimental data.关键词：ground moving target indication;DBS;STAP;channel balance2|722|4更新时间：2025-07-16
- 摘要：Scene heterogeneity,is a SAR image feature which reflects the textural information variation.Three heterogeneity measurements based on coefficient of variation,the ratio of the Arithmetic to the Geometric Mean and information theory respectively were theoretically investigated,and the detailed methods were provided. Finally,the performance comparison among the heterogenity was represented through the experiment simulation,and the samples of application in image segmentation were presented. The conclusion is that scene heterogeneity measurement can describe the degree of complexity for SAR imagery,which helps to post-processing of SAR image such as image segmentation.关键词：heterogeneity measurements;coefficient of variation;information theory;image segmentation4|634|3更新时间：2025-07-16
- 摘要：According to the characteristic of bistatic SAR(Synthetic Aperture Radar).The effect of phase errors due to random motion errors on the resolution of airborne bistatic SAR is analyzed.For zero mean random motion errors,an analytical result of rms (root mean square) resolution is derived.Based on the derived model,in the bistatic SAR system with random motion errors,Gaussian function is found to be the optimum weighting function on azimuth processing and the best achievable rms resolution is obtained in closed form.Simulation results show the availability of the proposed solution.关键词：bistatic SAR;random motion errers;root mean square resolution.2|677|0更新时间：2025-07-16
- 摘要：This paper considered the problem of direction of arrival(DOA)estimation with electromagnetic vector sensor arrays,and proposed the dual mode MUSIC(DM-MUSIC)algorithm based on the tensor model.Decoupling of direction and polarization parameters is also addressed,based on which a lower dimensional DM-MUSIC algorithm is proposed.(Lower dimensional)DM-MUSIC exploits the dual mode orthogonality of tensor signal subspace and two noise subspaces,and accomplishes DOA estimation by two consecutive projections.The simulation results exhibit the superiority of(lower dimensional)DM-MUSIC to the conventional MUSIC.关键词：DOA estimation;array signal processing;polarization;electromagnetic vector-sensor2|609|4更新时间：2025-07-16
- 摘要：A method is presented for improving the detection performance of the spacebased Synthetic Aperture Radar (SAR) system,in which the information is acquired by several SARs in a constellation observing the same area from different angles simultaneously,and then processed by the parallel distributed detection method.After studying the statistical characteristics of the ambiguity signal,with the impact of factors such as clutter,system noise and backscattering status considered,the individual spacebased SAR detection model is established,which shows that the detection performance depends on the observation angle.Based on the distributed detection theory,the Spacebased SAR Cooperation Detection (SSARCD) model is established,and the relationship between the detection performance and the parameters of the orbit,the platform and the SAR system is also determined,which benefits the design and realization of the cooperation detection system.Results from the contrast analysis prove that the detection performance of the SSARCD system is better than that of the individual spacebased SAR.关键词：synthetic aperture radar;cooperation detection;distributed detection;ambiguity signal3|626|2更新时间：2025-07-16
- 摘要：A Toeplitz decorrelation method using the eigenvector corresponding to the maximum eigenvalue (simplified as the maximum eigenvector) is proposed for the DOAs estimation of coherent sources.This method uses the largest eigenvector to construct a new Toeplitz matrix to estimate DOAs of coherent sources.Compared with the conventional decorrelation methods,it has better estimation performance,especially at low SNR scenarios,and it can estimate more coherent sources.Theoretical analyses and simulation results both show that the presented method is effective.关键词：eigenvector;DOA;Toeplitz;decorrelation2|513|5更新时间：2025-07-16
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A Multi-Objective Imaging Scheduling Approach of Earth Observation Satellite for Emergent Conditions
摘要：After analyzing the properties of the imaging scheduling problem of emergent condition of CBERS series EOSs (Earth Observing Satellites),we propose an approach of emergent imaging scheduling.We formulate the problem as path search of acyclic directed graph.On this basis,firstly we propose the conception of delay non-dominant path,then propose the multi-objective imaging scheduling algorithm basing on label correcting,which improve the efficiency of path search by forbidding the delay dominated path.And we also prove that the algorithm can find all the multi-objective optimization solutions.We also analyze the complexity of the algorithm simply.At last,the approach is tested on different emergent imaging scheduling problems of CBERS EOS series.Theoretical Analysis and experimental results shows that the proposed approach is successful in solving the emergent imaging scheduling problem of EOS.关键词：multi-objective imaging scheduling;acyclic directed graph model;delay non-dominant;path search;label correcting2|1034|9更新时间：2025-07-16 - 摘要：The definition of the fractional power spectrum and the fractional correlation for random signals are proposed,and the expression of the fractional power spectral density in terms of the fractional correlation function is described.Then,the fractional power spectral relations for the fractional Fourier filter are derived.Finally,the theory obtained is verified by simulations,and indicate the potential applications in chirp signals detection and fractional system identification.关键词：fractional Fourier transform;filtering in fractional Fourier domain;fractional power spectral density2|1284|2更新时间：2025-07-16
- 摘要：A new look-up-table memory predistorter for power amplifier with memory effects is proposed.The cascade extension of the memoryless predistorter and the structure of finite-impulse-response filter significantly reduce the complexity compared to memory polynomial methods,whereas they can get the close performance.Two improved methods,linear insertion and iteration with weights’ windows,are also discussed to solve quantization distortions and convergence speed problems respectively,which are introduced intrinsically by look-up-table method.Under power amplifier’s memory polynomial model,simulation results of multi-carriers WCDMA wideband signal and OFDM wideband signal show excellent performance of the look-up-table memory predistorter and the efficiency of the two improved methods.关键词：amplifier linearization;predistorter;look-up-table;power amplifier with memory effects2|1238|3更新时间：2025-07-16
- 摘要：This paper improves the regional term of the region-based geometric active contour model initially proposed by J.S.Suri.Thanks to the new region based regularity term,the improved algorithm not only solves the underlying problem on the stability of the primary algorithm,but also effectively improves the speed of segmentation.Along with the more accurate segmentation performances,the algorithm is also able to segment various cerebral tissues such as the white matter,gray matter and cerebrospinal fluid.The random multi-seed initialization is used to further minimize the sensitivity of the algorithm to the initial condition while disusing the manual intervention.The experiments on simulative and real MR images demonstrate the feasibility and the effectiveness of the improvement on the regional term.The comparison and analysis of the segmentation results under the noisy conditions also indicates the robustness of the proposed algorithm.关键词：image processing;FCM;level set;cerebral MRI;segmentation2|1745|16更新时间：2025-07-16
- 摘要：A new method to estimate 2-D DOA of multiple LFM signals is proposed.Based on a fact that the LFM signal has the energy-concentrated performance in the fractional Fourier transform domain (FRFD),a novel array data model in FRFD is constructed,MUSIC algorithm is then applied on correlation matrix in FRFD to obtain the 2-D DOA estimation of multiple LFM sources.The simulation results verified the efficiency of the new method.关键词：fractional Fourier transform;LFM signal;2-D DOA estimation2|817|15更新时间：2025-07-16
- 摘要：Whatever traditional wavelet edge detection technique was adopted,threshold was needed to filter candidate edge points for edge detection.However,threshold was obtained through experience presently,the best result was received after "cut and trial method" had been used repeatly,in addition,single-threshold calculation method can not accomplish accurate edge detection by now.These shortcomings restrict application of wavelet edge detection technique in practice.Aim at this problem,an algorithm of self-adaptive calculating double thresholds based on method of minimum interclass variance was proposed,and any parameter was not needing artificial setting .Fuzzy algorithm was adopted to link edge pixels,Theory and experiments showed that the algorithm was of validate and correct.关键词：Self-adaptive calculate double thresholds;minimum interclass variance;wavelet;edge-detection4|1380|6更新时间：2025-07-16
- 摘要：In order to improve the retrieval accuracy of content-based image retrieval systems and reducing the 'semantic gap’ between the visual features and the richness of human semantics.We proposed an user multimedia data management model.The user multimedia data management model includes user semantic model、user interest model and user intention model.Experiments show that user multimedia data management model can be successfully used in individuation image retrieval and individuation recommendation service.关键词：individuation image retrieval;user semantic model;user interest model;user intention model2|1140|1更新时间：2025-07-16
- 摘要：Through analyzing the characteristic of antenna near-fields calculation with the aperture integration (AI) theory and the plane wave spectrum (PWS) theory,a hybrid algorithm of antenna near-fields is obtained.By combining it with the surface integration (SI) technique,the aperture integration /spectrum area integration-surface integration (AI/SAI-SI) method is presented,to simulate the electromagnetic performance of three-dimension antenna-radome system.The method united advantages of the AI and the PWS theory is more practical and precise for the analysis of antenna near-fields.By taking a missile radome as simulation example,the results indicate that the proposed method is more agreeable to the experimental data than the AI-SI method and the PWS-SI method.关键词：radome;AI/SAI-SI;AI;PWS;SI2|1135|2更新时间：2025-07-16
- 摘要：An image magnification method with GVF-based anisotropic diffusion model is proposed.An image is magnified by bilinear interpolation at first.Then,an iterative restoration with a GVF based mean curvature flow diffusion and a Gaussian moving average LR constraint is applied to the magnified image.Since GVF is a rotational field,as an external force field to descript the edges of an image,the vector flow will become streamline near the jagged edges.Therefore,the GVF based anisotropic diffusion will be helpful to remove the jagged effects as well as keep the texture structures.Meanwhile,the Gaussian moving average LR model provides a data fidelity constraint which makes the results more close to the ideal HR images.Experiments results show that the proposed method can improve the quality of magnified image in terms of both the objective and subjective.关键词：image magnification;gradient-vector flow;anisotropic diffusion;super resolution3|1146|1更新时间：2025-07-16
- 摘要：This paper proposed an novel method for detecting echo signals.The wavelet function is used as the transmitted signal and the echo signal is detected with the corresponding completely same wavelet base.So the best match can be arrived.The advantage and implementation of new method was described.The simulation of the ultrasonic detection indicates the validity of the new way.The numerical results show good detection even for SNR of -17dB.Comparing with traditional method,the new method can increase the ability of signal detection.关键词：ultrasonic testing;matched wavelet;filter banks;signal detection2|610|4更新时间：2025-07-16
- 摘要：The 2-D decomposition arithmetic of local wave analysis (LWA) is studied deeply,and the 2-dimension decomposition method of HHT is developed and applied.The new method not only can adaptively extract details of a digital image,but also can get better results in eliminating image noise by comparing with the Wavelet Transform.关键词：2-D local wave analysis;digital image denoising;wavelet transform2|961|0更新时间：2025-07-16
- 摘要：To aim at the difficulty of the implementaion in computers for finite-difference time-domain (FDTD) algorithm,the concepts of time and space fault-tolerance are presented here.Furthermore,the fault-tolerance characteristic of FDTD algorithm is analyzed in detail,and some key factors are discussed which influence the running performance and computation precision in the fault-tolerant FDTD algorithm.With the implementaion of the fault-tolerance,the perfectly matched layer (PML) absorbing boundary is ignored,and the data arrays of electromagnetic field are gained by using memory-mapped technique,which is applied to time and space fault-tolerance for FDTD algorithm successfully.The computed examples are given,and various comparisons are made to prove the feasibility of this approach.The results show that the proposed method is effective.关键词：finite-difference time-domain (FDTD) algorithm;fault-tolerance;absorbing boundary;memory-mapped array2|650|1更新时间：2025-07-16
- 摘要：Based on the second-order composite surface and stochastic multi-scale models,an ocean surface backscattering model was proposed,including both the large-/intermediate-/small- scale scattering and the second-order Bragg scattering.Within this frame,we derived a second-order Bragg scattering expression,and developed an analytic solution of hydrodynamic modulation function according to weak hydrodynamic interaction theory.In addition,tilt modulation was simulated through the observation angle transform between nominal and local coordinate systems.The result shows that reasonable agreement between measured and simulated data is obtained,and this model is better than the two models mentioned above.关键词：ocean surface;radar backscattering;second-order scattering;hydrodynamic modulation;tilt modulation2|932|7更新时间：2025-07-16
- 摘要：To obtain an extremely high accurate surface precision and the electromagnetic performances,the large space parabolic antennas with truss structures should have special characteristics.A mechatronic optimization design model of space antenna structures is developed for the improvement of the electromagnetic performances,which adopts the axial gain of antenna and power consumption of actuators as the objective functions,and the material strength of bars and actuator’s mechanical capability as constraint conditions.The two applications of optimization model to truss antenna structures demonstrate the potential for the significant improvement of antenna performances.The analysis results indicate the benefit of including the electrical performance in optimization model for necessary effort for shape control of large space antenna reflectors.关键词：reflector antenna;space truss structure;coupling analysis;optimization model2|661|9更新时间：2025-07-16
- 摘要：Channel estimation for orthogonal frequency division multiplexing (OFDM) systems is very important when it is used in mobile communication field.Analyzed a linear minimum mean-squared error (LMMSE) algorithm using frequency correlation,provided approximate estimation for some key parameters as channel maximum time delay,noise power based on theoretic model assumption.Derived a practical MMSE channel estimation method,and analyzed its complexity and the way to further simplify the algorithm.Presented the performance simulation to this improved MMSE algorithm in different channel conditions,and then analyzed the simulation results.关键词：OFDM;channel estimation;LMMSE;Channel maximum time delay2|724|7更新时间：2025-07-16
- 摘要：A MDS clustering algorithm using for extraction of digital TV user feature is proposed,and solved the problem that the classic clustering algorithm can not be used because of the TV program sample having no distance measurement.The program feature model and the program difference model expressed by time,channel,main category and subcategory are founded.The detail process of MDS clustering algorithm using to pick up TV user feature is presented.The calculated feature based on real user watching record conforms real user action well with 70% precision.2|642|1更新时间：2025-07-16
- 摘要：The Curvelet is more suitable for image processing than the wavelet and able to represent smooth and edge parts of image with sparsity.Based on the advantages of curvelet,we present a novel method for image restoration and decomposition via curvelet shrinkage.The new model can be seen as generalizations of Daubechies-Teschke’s model.By writing the problem in a curvelet framework,we obtain elegant curvelet shrinkage schemes.Various numerical results on denoising,deblurring and decomposition of images are presented and they show that the model is valid.关键词：the second generation of curvelet;negative Hilbert-Sobolev space;image decomposition;image restoration;image deblurring2|1114|1更新时间：2025-07-16
- 摘要：Ensemble Monte Carlo method is used to simulate the time-resolved transmission characteristic of Semi-Insulting GaAs (SI-GaAs) photoconductive switches based on "Auston" equivalent circuit model.According to the dynamic performance of photo-generated carriers in the semiconductor,we study the transmission characteristics,dielectric relaxation properties,energy storage specialty and work modes of photoconductive switches triggered by femto-second laser pulses and analyze the physical mechanism that the nonlinear photoconductive switches have the threshold of optical energy and electric bias field.关键词：photoconductive switches;Ensemble-Monte Carlo method;inter-valley scatter;negative resistance effect2|1138|0更新时间：2025-07-16
- 摘要：Limited by the number of sensors and multi-path propagation,the performance of the array with small number sensors might be degraded severely when it is combined with beamforming to separate signals.A new method is proposed by combing adaptive canceling with beamforming technology,in which the adaptive canceling is cascased with null beamforming.Under the assumption that the direction of the signal is known,the performance of array signal processing can be greatly enhanced.The validity of the method is also verified by the simulations.关键词：small number of sensors;beam-forming;adaptive canceling;signal separation;multi-path2|587|0更新时间：2025-07-16
- 摘要：A multiple-input multiple-output (MIMO) radar uses multiple antennas to simultaneously transmit independent signals to illuminate the targets,while uses multiple antennas to receive the reflected signals.In this proposal,the robustness of the parameter estimation in MIMO radar systems is considered.With the azimuth estimated by maximum likelihood method,the estimate of the fading vector is obtained by applying the amplitude and phase estimation (APES) technique.Motivated by the development of robust Capon beamformer (RCB),a robust APES estimator of the fading vector is derived as well by considering the inaccuracy estimation of the azimuth.The simulation results show that both APES estimators behave rather similar.And hence,the APES algorithm is robust in the parameter estimation of MIMO radars.关键词：multiple-input multiple-output(MIMO) radars;parameter estimation;robustness;amplitude and phase estimation(APES)3|1425|6更新时间：2025-07-16
- 摘要：A 2-D compression of ECG signals is proposed based on context models.R waves are recognized by max absolute value detection and repeated matching.An ECG image is constructed automatically and coding data map is created based on the information of cardiac cycles.Then,1-D discrete wavelet transform and uniform scalar dead zone quantizer are applied to ECG images.Quantized coefficients are decomposed into significance map,sign stream,position of the most significant bit stream and residual bit stream.Based on the coding data map,an adaptive arithmetic coder with different context models is employed for entropy coding of these streams.Two datasets from MIT-BIH arrhythmia database are compressed.With the compression ratio of 20,the percent root mean square difference of 2.93% and 4.31% are achieved,in contrast to 3.26% and 4.8% by JPEG2000 scheme.Results indicate that our method outperforms other compression schemes.关键词：R wave recognizing;coding data map;context model;2-D compression2|1162|1更新时间：2025-07-16
- 摘要：The construction of a kind of piecewise linear chaotic system is investigated based on the heteroclinic shilnikov theorem.These systems have at least two equilibriums and at each equilibrium they have the same Jacobian matrix.According to the amount of the equilibriums and the relative positions of the separating planes,some different chaotic systems of this kind can be obtained.Furthermore,the proposed method is extended to the construction of the higher dimensional systems,and some 4-D chaotic systems are also obtained.Finally,the circuit implementation of the system is given.关键词：chaotic system;piecewise linear;Shilnikov theorem;heteroclinic orbit2|1505|4更新时间：2025-07-16
- 摘要：Group delay is an important parameter describing network transfer delay and distortion characteristics.Traditional definition and measurement formula of group delay is based on derivative,which has some inherent faults: the inconsistency of resolution and accuracy,incapacity to describe the global phase character of signal bandwidth and difficulty to describe phase distortion quantificationally.To resolve these problems,a new group delay definition and measurement formula has been put forward based on Taylor series expansion,which has been used in the GPS timing receiver RF cable group delay measurement.The experiment shows that the accuracy of the new group delay measurement is better than 0.01ns and consistent with the GPS signal delay.The maxim difference between the signal delay measured by GPS timing receiver and the zero order group delay measured by the new group delay measurement method is less than 0.3ns.关键词：group delay;time synchronization;pseudo-rang;GPS time transfer receiver;Taylor series expansion3|5629|14更新时间：2025-07-16
- 摘要：In low signal-to-clutter ratio,in order to solve the problem of the terminal threshold setting and poor capability in tracking with the moving target based on dynamic programming (DP) algorithm,the characteristic with two-steps detection thresholds in radar track-before-detect(TBD)is analysed.In the background of Rayleigh clutter,signals after optimizing are confidence tested and trajectory calibrated.This algorithm makes terminal threshold setting easy and improves the track probability. Simulations testify the validity of the new algorithm.关键词：track-before-detect;threshold;dynamic programming;confidence test;low signal-to-clutter ratio3|2471|13更新时间：2025-07-16
- 摘要：Artificially triggered lightning experiment was conducted in Shandong Province in the summer of 2005,10 return strokes current waveforms in microsecond time resolution have been obtained in the channel bottom.Based on the Diendorfer and Uman(DU) model,the current waveforms characteristics along the channel are simulated and discussed.It is found that the simulated current waveforms along the lightning channel are in agreement with the optical measurements when the two different discharge time constants are properly chosen;compared with other return stroke models,the DU model is more physically reasonable and more preferable.关键词：Artificially triggered lightning;Lightning discharge current;Simulation2|552|3更新时间：2025-07-16
- 摘要：We propose small-scale-hint-character-list (SSHCL) features for location and organization names under the conditional random fields framework.As experiments show,SSHCL features provide significant gains in precision,especially for organization names,showing complementary property to part-of-speech.It also lowers construction and training cost greatly that a common large scale feature set demands.The overall proper nouns F1 measurement of integrated system on simple Chinese 863 program 2004 NER corpora reaches 88.76%,gaining 8.63% improvement over the best system in the evaluation.The performance on SIGHAN 2006 is also remarkable.关键词：Chinese named entity recognition;small-scale-tail-hint-character-list feature;conditional random fields;natural language processing;machine learning2|3014|17更新时间：2025-07-16
- 摘要：According to the principle of unity of opposite on natural tree growing and wilting,a competition model is developed.Then,a competition algorithm of simulated growing natural tree is presented.To verify the algorithm,it is applied to the curves fitting.Compared with the standard genetic algorithm,it runs faster with less memory and has higher precision;compared with the classical least square method,it requires less memory with noiseproof feature.This algorithm may provide a novel solution to the design and calculation of optimization.关键词：natural tree;growth;competition;optimization;curve fitting2|1144|2更新时间：2025-07-16
- 摘要：A new method is introduced to model the complex structure object by using the higher order bases on the large patches and the low order bases on the small patches in this paper.This method will utilize the order of the different bases and the number of unknowns reasonably.Furthermore,this method will get the accurate results but not increase the burden in solution and keep the merit of the two kinds of bases.关键词：higher order hierarchical bases;electromagnetic modeling;numerical method2|1144|0更新时间：2025-07-16
- 摘要：A position method,based on time-of-arrival(TOA)in the line-of-sight environment,is proposed by using coordinate shift method.The rough result of the mobile station(MS)position can be calculated through the first step of coordinate shift by using the base station(BS)and MS geographical position relationship.This paper also proposed the error vector covariance by analyzing the character of the error vector,and the WLS method is used to get the second step estimation of the MS position.The simulation results verify the performance of this method.关键词：coordinate shift invariance;wireless location;time-of-arrival estimation;location algorithm2|1199|3更新时间：2025-07-16
- 摘要：Under condition of low SNR and short duration of measured frequency,to increase precision of frequency estimation and be suitable for multi-section signals with the same length and known frequency-ratio,a frequency-division equilong fusion algorithm is proposed.For unequal measured frequencies of different sections,generate the parameter matrix for frequency-domain analysis to carry out frequency normalization treatment.For phase discontinuity among different sections even after frequency normalization,design phase-difference compensating factor matrix to obtain frequency spectrum as well as phase-continuous signal.Generate search frequency array and obtain frequency spectrum amplitude matrix with certain form.To prove validity of the algorithm,detailed mathematical justification is provided.Simulated experiments show that the algorithm is true of any type of multi-section signals with the same length and known frequency-ratio.It has good noise immunity and its precision of frequency estimation is much higher than that of existing methods.关键词：frequency estimation;multi-section signals with the same length and known frequency-ratio;Information fusion2|610|8更新时间：2025-07-16
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