最新刊期
卷 42 ， 期 11 ， 2014
- 摘要：A novel approach based on scale-invariant feature transform (SIFT) and kernel sparse representation for traffic object recognition in complex traffic scenes is proposed in this paper.First,SIFT is introduced for feature extraction from samples and test targets,respectively.The features are mapping to the kernel space,then we construct an over-complete dictionary based on kernel sparse representation,traffic objects are recognized by computing sparsity and reconstruction residuals in the dictionary.We also analyze the relationship between recognition rate and dimensionality reduction of the SIFT descriptor using random projection.Experiment results show that the proposed approach enhances the class discriminant ability using traffic features with higher recognition preciseness and robustness in complex traffic scenes compared with SVM,SRC.关键词：kernel sparse representation;scale-invariant feature transform (SIFT);traffic object recognition;compressive sensing;random projection2|2|5更新时间：2025-07-16
- 摘要：Human being daily skill can be exerted fully and bondage can be delivered efficiently in which people use ordinary equipment as an input way if pointing gesture is used for human-computer interaction(HCI).One of key problems is how to reliably recognize pointing user from HCI scene with cluttered background.A novel method has been developed based on spatio-temporal motion.According to multi-scale wavelet transform(MWT)with outstanding local characteristics both in spatial and temporal domains,it is adopted to extract foreground motion subject from cluttered scene.Some disadvantages are overcome including restrictions in environment conditions,dynamic environment variation,and a priori assumption.MWT based gradient integral graph is used to get some HOG feature vectors in pointing hand which are classified and learnt based on machine learning.Pointing user is recognized according to spatial relationship between pointing hand and its corresponding subject.Experimental results have been shown that the proposed method is efficient and viable.关键词：human-computer interaction;pattern recognition;spatio-temporal feature;object segmentation;feature extraction2|2|5更新时间：2025-07-16
- 摘要：A fault occurring in the router of Network-on-chip will certainly affect the overall network's performance.At the same time,the excessive fault-tolerant overhead brings a huge burden to the network.For these reasons,this paper proposes a low-overhead fault-tolerant router architecture which reduces the area overhead by decreasing unnecessary crossbar and rationally optimizing the number of VCs in each port.Simultaneously,a redundant channel is used to tolerate fault for the router.When a channel fault occurs in the router,by using an isolated channel detection method,the routers can simultaneously detect the fault type and transmit data.Moreover,a new buffer with a recycle pointer is designed to retransmit error packages which would save the overhead of the fault-tolerant unit.Experimental results show that,in the case of no fault existing,the proposed router has 45% lower latency in average and 28% higher throughput rate performance than a typical VC router with only 18.24% larger area.In the case of the faults existing,the proposed router is also able to achieve good fault tolerance effect.关键词：network-on-chip;router fault;fault-tolerant;fault channel isolated2|2|9更新时间：2025-07-16
- 摘要：In order to cope with the complex variation of target appearance during visual tracking,a robust tracking algorithm based on feature matching of key regions is proposed.Firstly,it initializes the target model and obtains target candidate through filter prediction.Then,it extracts the key regions of target model and target candidate using adaptive marker-based watershed algorithm and describes them with multiple features.Finally,it matches the key regions to get the mapping from target model to target candidate and calculates the final tracking results to output and update the target model.The proposed algorithm is tested on the video database containing the appearance variation of scale,occlusion,rotation,illumination,pose,background clutters,and motion blur.The experimental results demonstrate that the proposed algorithm can well cope with the complex appearance variation,especially shows the robustness to the partial occlusion,illumination and background clutters.关键词：visual tracking;region segmentation;region matching;marker-based watershed2|3|2更新时间：2025-07-16
- 摘要：Knowledge Transfer has gradually became a research hot pot in machine learning,which tries to transfer the knowledge from the historical tasks to the target task in order to speed up the convergence rate and improve the performance of algorithms.With respect to the slow convergence rate of traditional reinforcement learning algorithms,this paper proposed to transfer the value function between different similar learning tasks with the same state space and action space,which tries to reduce the needed samples in the target task and speed up the convergence rate.Based on the framework of on-policy Sarsa algorithm,combined with the value function transfer method,this paper put forward a novel fast Sarsa algorithm based on the value function transfer—VFT-Sarsa.At the beginning,the algorithm uses Bisimulation metric to measure the distance between states in target task and historical task on the condition that these tasks have the same state space and action space,transfers the value function if the distance meets some condition,and finally executes the learning algorithm.At the end,apply the proposed algorithm in Random Walk,compared with Sarsa algorithm,Q-Learning and QV algorithm,the results show that the proposed algorithm can get a better convergence rate with a good performance.关键词：reinforcement learning;VFT-Sarsa algorithm;bisimulation metric;value function transfer3|2|4更新时间：2025-07-16
- 摘要：The partial period properties of the Kerdock-code sequences derived from Zpl are studied,where p is an odd prime and l is an arbitrary positive integer.Utilizing a nontrivial upper bound for the incomplete exponential sums over Galois rings of characteristic pl,we obtain the upper bounds for the aperiodic autocorrelation and crosscorrelation of the p-ary Kerdock-code sequences derived from Zpl.Also we analyze the partial period distributions and the partial period independent r-pattern distributions of these sequences.The results show that such sequences have low aperiodic autocorrelation and crosscorrelation,and their partial period distributions and partial period independent r-pattern distributions are asymptotically uniform,which indicates that these sequences have strong potential applications in communication systems and cryptography.关键词：Kerdock-code sequence;incomplete exponential sum over Galois rings;aperiodic correlation;partial period distribution;r-pattern2|2|0更新时间：2025-07-16
- 摘要：Similar execution paths generation is one of the fundamental tasks in code analysis and detection.The current methods usually target to the program behavior or program structure,and change the value of key predicates,but these methods has a low effectiveness due to the lack of the necessary guidance information,Meanwhile,the predicates set has a large size and usually hard to solve,thus it will reduce the analyze precision as well.A technique of similar execution paths generation based on dynamic synergy bidirectional mapping is proposed in this paper.According to extend the shape of Control Flow Graph and use the backward symbolic analysis,the weakest precondition of the candidate path is generated,which can be used as the guidance information to generate pointed similar execution paths set according to the edit distance via changing the distance factor.The experimental results show that this method has the advantage of precision and anti-inference.关键词：static analysis;control flow graph;weakest precondition;similar execution path4|2|0更新时间：2025-07-16
- 摘要：Identifying key entities has many implications for software understanding and controlling and reducing maintenance costs.However the existing methods only focus on identifying key classes.Little work has been done on the identification of key entities at the other levels.Further the existing work also failed to reveal the relationships between key classes and external quality attributes.In this paper,we introduce a novel method IDEEP (IDEntifying kEy Packages using weighted PageRank algorithm) to identify the key packages.IDEEP uses a weighted and directed software network to describe packages and their dependencies,proposes a new metric PR (PackageRank) to quantify the package importance,and introduces a weighted PageRank algorithm to compute PR values.Our experiments are carried out on six Java software systems.First we analyze the correlation between PR values and other centrality metrics such as betweenness,closeness and degree.Second we use a weighted version of the susceptible-infectious-recovered model to examine the spreading influence of each node.The results show that our method is better than other six methods.Further,we reveal the relationships between key packages and their understandability and show that the key packages identified by our method are more meaningful from a software engineering perspective.关键词：key package;PageRank algorithm;software network;program comprehension4|3|5更新时间：2025-07-16
- 摘要：To solve the problem of the ambiguity of angle measurement in the existing signal processing method of POL-neuron model,the PFAC polarization information processing model based on the uneven distribution of the polarization intensity in the atmospheric polarization pattern is proposed,which has three polarization channels and one un-polarization channel.The effective angle measurement range can be increased from[-45°,45°]to[0°,360°]by judging functions and the comparison of polarization intensity in different sky regions.Detailed theoretical description of the PFAC calculation model and the analysis of the measured data are presented in this paper,the result demonstrates that this improved model can solve the ambiguity of POL-neuron model in angle measurement effectively,PFAC model provides an effective solution for angle distinction within the range of[0°,360°]in polarized skylight navigation.关键词：polarized skylight navigation;ambiguity of angle measurement;sensor;solar meridian;atmosphere polarization pattern2|2|3更新时间：2025-07-16
- 摘要：Quantum linear time property is defined,including quantum safety property,quantum invariant which their relationships and properties are studied.Together with measure-one and measure many one way quantum finite automata,two kinds of the product quantum markov chains are constructed,the checking method of quantum regular propertyis provided based on automaton technique.This method shows the satisfaction of quantum regular safety is decided by the reachable termination verification of the product quantum markov chain,and thecomputation formula of satisfaction probability is given.As an application example,the generalized quantum loop program is analyzed.It shows the termination of program is turned into the satisfaction for the verification of quantum regular safety property.关键词：quantum Markov chain;model checking;safety property;quantum finite automata;generalized quantum loop program2|3|4更新时间：2025-07-16
- 摘要：Semi-supervised learning(SSL),as a powerful tool to learn from a limited number of labeled data and a large number of unlabeled data,has been attracting increasing attention in machine learning community.Of various SSL methods,graph based approaches have attracted more extensive research due to their elegant mathematical formulation and good performance.However,there may exist several nontrivial concerns such as such as model parameters sensitiveness and insufficient discriminative information in data space,etc,in existing graph based SSL approaches.To these ends,in this paper,we propose a robust Sparse Feature Space embedding Regularization(SFSR)SSL framework.The main idea of the proposed SFSR includes three folds:(1)linearly embedding input data into its feature spaces(2)sparsely reconstructing input data using its feature space embedding projection images;and(3)preserving the same sparse representation relationship among labels of data as that among data in some label space spanned linearly by input data,thus constructing a novel sparse nearest feature space embedding regularizer,coined as SFSR.The comprehensive experimental results on several real-world benchmark databases are presented to demonstrate the significantly robust effectiveness of our proposed method.关键词：graph based semi-supervised learning;sparse representation;nearest feature space embedding;regularization.2|2|0更新时间：2025-07-16
- 摘要：The regularization method has recently been an efficient approach to make the process of image denoising well-posed,while preserving image textures and details become more intractable.This paper focused on directional texture preserving image denoising problem gives a directional texture preserving total variation regularization based model.Furthermore,we analyze and demonstrate some equivalent properties of the directional total variation,and give the majorization minimization algorithm based on iteratively constructing surrogate functionals and B-spline difference filters.Numerical experiments show that the new method can achieve better result in removing the noise,restraining staircase effect and preserving directional texture.关键词：directional total variation;texture preserving;image denoising;B-spline;staircase effect2|6|3更新时间：2025-07-16
- 摘要：The roll eccentricity signal was complex high frequency periodic signal which is mixed in a variety of random disturbance.As the method of FFT(Fast Fourier Transform) is limitations for analyzing the roll eccentricity signal,in this article a new method is presented that is the combination of Root-Multiple Signal Classification (Root-MUSIC) based on higher-order cumulans (HOC) and Prony method.Using Root-MUSIC of HOC accurately estimate the harmonic frequencies and harmonic number in the meantime the roots which were obtained by the Root-MUSIC directly estimate the harmonic amplitude and phase by using Prony method.The simulation results and experimental results showed that the method is feasibility and effectiveness.In the case of low SNR it still has high spectral resolution and estimation accuracy and can estimate eccentric harmonic frequency amplitude and phase.The advantages of this approach is outstanding than FFT in the frequency resolution and restraining noise.关键词：root-MUSIC;higher-order cumulants;Prony;the roll eccentricity signal;parameter estimation2|2|4更新时间：2025-07-16
- 摘要：A new compressed sensing model is proposed to reconstruct hyperspectral image.In the encoder side,block-dialog measurement matrix formed by permuted noiselets transform is used to randomly measure the signal of each channel independently.In the decoder side,the low rank and sparse representation models are firstly constructed to decompose hyperspectral data matrix into low rank and sparse parts,and the low rank part is further sparsely decomposed.Then,the intra-channel low rank prior and the inter-channel sparse prior are jointly utilized to reconstruct the compressed data.A numerical optimization algorithm is also proposed to solve the reconstruction model by augmented lagrange multiplier method.Every sub-problem in the iteration formula admits analytical solution after introducing auxiliary variable and linearization operation.The complexity of the numerical optimization algorithm is reduced.The experimental results verify the effectiveness of our algorithm.关键词：compressed sensing;low rank prior;sparse prior;augmented Lagrange multiplier method4|3|6更新时间：2025-07-16
- 摘要：In order to avoid the conflict between the convergence speed and stable state error for a single LMS filter,and degrade the performance of the recognition system,we used combined least mean square (CLMS) algorithm which is the parallel of fast LMS filter and slow LMS filter.Meanwhile,to further improve the performance of the CLMS algorithm,a new variable step-size convex combination of LMS (VSCLMS) algorithm was proposed by improving original VSCLMS.In the proposed algorithm,we considered the variable step-size filter on the basis of minimum mean square weight error (MMSWE) as the fast LMS filter,and a new constant step-size filter based on steady-state LMS is used as the slow filter.By analyzing theory and experimental results,the proposed algorithm,which compared with the original VSCLMS algorithm and CLMS algorithm,not only has a superior capability of tracking under the environment of noise,time-varying and unstable condition,but also can maintain a better convergence.关键词：adaptive filtering;LMS algorithm;CLMS algorithm;VSCLMS algorithm;improved VSCLMS algorithm2|2|8更新时间：2025-07-16
- 摘要：A service substitution method is proposed based on service clusters.The services in a service library are clustered and service clusters are formed.The net unit and matrix models of a service cluster are constructed.Assume that the service composition based on service clusters is established,the model of the combination service net is established by analyzing the combination processes.From the standard matrix model of a failure service and the model of the combination service net,a quick finding and substitution algorithm of services is presented.The correctness and validity of the proposed method are illustrated by an example.Also,the experiment results show that the efficiency of service substitution can be enhanced and the rubusteness of service composition can be kept based on the standard matrix model of the failure service.关键词：service cluster;service composition;net unit model;service substitution;Petri net2|2|5更新时间：2025-07-16
- 摘要：The decision maker(DM)usually is only interested in small part of Pareto optimal solutions in the actual multi-objective optimization.However,the traditional multi-objective optimization algorithms pay more attention to the entire surface of the Pareto optimal solution set which need to spend large amount of computation time on the futile solutions search and the Decision Maker is difficult to select their preferred solutions from numerous solutions(especially when the problem's object is greater than 3).Therefore,this paper proposed a preference multi-objective evolutionary algorithm which is based on the angle information of individuals.This method could priority retain these individuals which is closer to the DM's preference region by redefining the domination relation and crowding distance of individuals,then the population will be guided to the DM's preference region.关键词：multi-objective evolutionary algorithm;preference multi-objective optimization;preference point;interactive process;decision maker2|2|5更新时间：2025-07-16
- 摘要：A novel time-frequency analysis method referred to as matched Wigner transform (MWT) was defined in this paper.By matching bilinear signal kernel with Taylor extended Fourier revolving factor,MWT can produce a time-frequency distribution (TFD) with best concentration and without inner artifacts for mono-component high-order polynomial phase signal (PPS).In addition,an effective parameter and instantaneous frequency (IF) estimation algorithm was proposed based on MWT.The algorithm was validated by simulation examples.Finally,excellent sea experiment results were obtained when applying it to analyze the weak Doppler signal of underwater moving acoustic source.关键词：time-frequency distribution (TFD);polynomial phase signal (PPS);matched Wigner transform;instantaneous frequency estimate (IF);Doppler signal2|2|4更新时间：2025-07-16
- 摘要：Single-carrier frequency domain equalization (SC-FDE) is an effective technique to cope with multi-path fading.Multi-input Multi-output (MIMO) can greatly improve the spectrum utilization.The combination of these two techniques has become the uplink transmission scheme for the next generation wireless communication.Whereas,the performance of MIMO SC-FDE system would degrade a lot under fast time-varying channels because of severe subchannel interference.To solve this problem,we propose the MIMO single-carrier fractional Fourier domain equalization system (MIMO SC-FrFDE).The equalization is done in the fractional Fourier domain instead of Fourier domain.Through selecting the optimal fractional Fourier transform order,the fractional Fourier domain channel matrix can be approximately diagonalized.Simulation results show that our proposed system can improve the performance compared with the MIMO SC-FDE system in fast time-varying channels.关键词：fractional Fourier transform;MIMO single-carrier;optimal fractional Fourier transform order2|2|0更新时间：2025-07-16
- 摘要：The technique of keyword search over graph data can be applied to structured data,semi-structured data,and unstructured data.It enables ordinary users to retrieve related information from data without the needs of being familiar with any query languages and underlying data model.Keyword search over graph data is one of research hotspots of the database and information retrieval.The paper proposed a detail review of the current work of keyword search over graph data.Firstly,basic concepts were introduced.Then,some key techniques in the query processing were summarized and analyzed,including search methods,ranking strategies,query intent,and query evaluation.Finally,the existing problems in the current research work and future research issues were also discussed.关键词：keyword search;graph data;ranking;query evaluation2|2|0更新时间：2025-07-16
- 摘要：Towards the fact that it is difficult to provide privacy protection and integrity verification simultaneously in data aggregation,we propose a privacy preserving histogram aggregation(iPPHA) algorithm with integrity verification support.It constructs two aggregation trees to transmit aggregate data and redundant information separately.It lets the sink use the redundant information to verify the integrity of the aggregation result.Considering the packet loss problem in WSN,we design an ID transmission scheme flexible bit-map to ensure the reliability of privacy preserving data aggregation and integrity verification.The simulation results show that iPPHA can verify data integrity while protecting data privacy without dramatic resource consumption increase.Flexible bit-map scheme significantly reduces the ID transmission overhead by 70 percent.关键词：wireless sensor network;privacy preservation;data aggregation;integrity verification;ID transmission2|2|4更新时间：2025-07-16
- 摘要：Oblivious Transfer (OT) protocol is a fundamental building block for Secure Multiparty Computation and finds critically important applications in protecting privacy in various settings.Nevertheless,existing OT protocols do not include the procedure to conduct the statistical analysis in a cooperative environment.Here,a new OT protocol is proposed with a cooperative statistical analysis by pursuing secure multiparty computation of the sum,adopting the homomorphic encryption scheme,and using a clever coding method.Specifically,the sender can calculate the total number of each message sent privately within a given period.Theoretical analysis indicates that the new protocol allows for secure and efficient transfer of private messages in an oblivious way and shows great promise for practical applications in Electronic Commerce,Healthcare Management and other secure systems as well.关键词：cryptography;secure multiparty computation;oblivious transfer;statistical analysis4|2|3更新时间：2025-07-16
- 摘要：The performance of vehicular network management has a great effect on communication safety between automotive electronic systems.The practical working states of OSEK NM logical ring are modeled and a transition model among working states is established.The definitions of NM induced message and logical ring instable time are introduced,and the equations to evaluate NM performance are derived after the instable state is analyzed quantitatively.A scheme of building ring with second immediate successor is presented and its performance is also analyzed.Experiments show that compared to OSEK NM,the scheme in this paper can effectively improve real time of vehicular NM and reduce its bad interruption on the user message transmission.关键词：vehicular network;instable state;second immediate successor;building ring;OSEK network management4|2|0更新时间：2025-07-16
- 摘要：An efficient direct data domain STAP scheme based on a sparse reconstruction of the primary data is presented to effectively detect ground moving targets.To reduce the computational complexity,the proposed method obtains the high resolution angle-Doppler spectrum by finding the sparsest coefficients using the reduced-dimension data in element-Doppler domain.Therefore,based on the distinct image features of clutter and targets signals,a knowledge-aided moving targets detection algorithm is also introduced.The effectiveness of the proposed approach is shown by both theoretical analysis and simulation results.This scheme is computationally efficient for real-time parallel processing.关键词：space-time adaptive processing;sparse reconstruction;clutter suppression4|2|3更新时间：2025-07-16
- 摘要：This paper presents a high-speed backplane transmitter with an equalizer that can be reconfigured to baud rate finite-impulse-response(FIR)data center 2-level pulse amplitude modulated(2-PAM)and 4-level pulse amplitude modulated(4-PAM)equalizer,edge equalizer,and duobinary equalizer.Equations to optimize the equalizer design are introduced.A test chip has been designed in 90nm CMOS.Experimental results on a 40in backplane at 10 gigabits-per-second(Gbps)match the theoretical analysis.The transmitter consumes 70.3mW of power from a 1.2V supply while driving 500mV peak to peak voltage.关键词：backplane;equalizer;group delay;inter-symbol-interference(ISI);finite-impulse-response(FIR)2|2|0更新时间：2025-07-16
- 摘要：The traditional optical visibility instruments bear their respectine in observation defects.Digital photography visiometer system (DPVS) is one new type of visibility automation observation instrument,has been developed by adophing advanced digital photography technologe and imitating manual VisibiLity observation by human ege based on the definition of visibiLity visibility's theory and according to the definition of meteorological visibility.This thesis introduced the work theory of system、compose of system、structure of hardware and software flow,in the end some contrasted experiment results between DPVS and traditional optical visibility as well as manual visibility observation were given.The results show that the three ways share the same change trend with kind of differences.And in complicated weather conditions,like rainful the differences are more obvious.关键词：digital photographic technology;visibility automation observation instrument;CCD camera;control circuit;comparative experiment4|2|4更新时间：2025-07-16
- 摘要：The traditional video processing system of remote sensing camera has several drawbacks such as complex interfaces and redundant functions,which lead to disadvantage in debugging and integration.Highly-integrated video processing FPGA software design of a remote Sensing camera is introduced in this paper.This software realized all the video processing functions based on one VirtexII-3000 FPGA,including TDICCD driving,data acquisition,image compression,remote telemetry,auxiliary data coding,data transmission and imaging time calibration.This paper focuses on the multi-function integration,JPEG2000 compression algorithm realization and data rate balance between the compression module and Spacewire interface.The single board test and thermal cycling tests had proved that this software realized all appointed functions and could run stably.关键词：highly-integrated;JPEG2000 compression;Spacewire interface;data rate balance1|2|3更新时间：2025-07-16
- 摘要：With the development of multi-core processors,it becomes a key problem to transmit concurrent trace data simultaneously to on-chip buffer under bandwidth constraint.To deal with the problem,we propose a Map-based Self-regulation Location Selection (MSLS) algorithm.This algorithm locates multiple trace buffers in interconnection fabrics under the bandwidth constraint,and reduces the average distance between trace sources and trace buffers.Experimental results show our algorithm can achieve high efficiency for post-silicon debug.关键词：multi-core chip;post-silicon debug;concurrent trace;multi-buffer location selection;network-on-chip2|2|0更新时间：2025-07-16
- 摘要：To detect and defend industry virus attacks to application layer protocol data is difficult issues in study of industrial security gateway.In this paper,a data pre-processing method is presented,which can convert Modbus TCP traffic into anomaly detection model,and a PSO-SVM algorithm is designed,which optimizes parameters by advanced Particle Swarm Optimization (PSO) algorithm.The method identifies anomalies of Modbus TCP traffic according to appear frequencies of the mode short sequence of Modbus function code sequence.Finally,experimental data analysis shows that the proposed method can effectively detect abnormal of Modbus function code sequence.关键词：PSO;SVM;Modbus function code;sequence anomaly detection;industrial security gateway2|3|22更新时间：2025-07-16
- 摘要：A resonant DC link soft-switching inverter was proposed to realize an inverter which has a simple topology,an easy control strategy,high efficiency and high power density.Auxiliary resonant unit was added to DC link of conventional inverter to make DC-bus voltage decrease to zero periodically,which realized zero-voltage operation of all switching devices in inverter.Furthermore,the switching device in the auxiliary resonant unit could be turned on under zero-current and turned off under zero-voltage.In addition,because only one auxiliary switch was in the auxiliary resonant unit,control strategy was relatively simple and cost of hardware was lower.The operation principle was analyzed.The equivalent circuits at different operation modes and conditions for realization of soft-switching were presented.A 1kW laboratory prototype had been built.Experimental results were proposed to confirm validity of soft-switching inverter presented.关键词：resonant;zero voltage switching;single auxiliary switch;soft-switching;inverter2|3|6更新时间：2025-07-16
- 摘要：It is established a model for information spreading over the social network originating from the SEIR model of the dynamics of infectious diseases.Analyses are given with the model on the effect of the propagation mechanism and network parameters on the processes of information spreading,based on the users' behavior characterization dynamic evolution equations are deduced and the temporal evolution rules of the processes of information spreading are elaborated.The results of simulation experiment show that the SEIR-based model presented is capable of reflecting the tendency and describing the processes of information spreading over the SNS.关键词：social network;model for information spreading;SEIR;differential equation2|2|14更新时间：2025-07-16
- 摘要：Orthogonal waveform is the most widely used waveform in multiple input multiple output (MIMO) radar systems.The good performance in both auto-correlation and cross-correlation of transmitted orthogonal waveform is crucial for MIMO radar.In order to overcome the deficiency in auto-correlation performance of orthogonal frequency division-linear frequency modulation (OFD-LFM) signals,this paper proposes the model of orthogonal frequency division-nonlinear frequency modulation (OFD-NLFM) signals.The design method of OFD-NLFM signals for MIMO radar is also presented.Simulation results show that OFD-NLFM signals have better performance in both auto-correlation and cross-correlation compared with OFD-LFM signals.关键词：multiple input multiple output (MIMO) radar;waveform design;orthogonal frequency division linear frequency modulation (OFD-LFM);orthogonal frequency division nonlinear frequency modulation (OFD-NLFM)5|3|4更新时间：2025-07-16
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