最新刊期
卷 ， 期 4 ， 1992
- 摘要：On the basis of the skew-symmetric decomposition of an orthonormal matrix, this paper proposes a linear algorithm for determining 3-D motion parameters of a rigid body in monocular case. Since the computation for rotation parameters is simplified from nine variables to three variables in the algorithm, the complexity of the computation is reduced so greatly that the reliability and the stability are improved apparently. The translation up to a positive scale factor and three independent variables of rotation can be derived uniquely through- solving a series of overdetermined linear equations. Simulation experiments show that the relative error of rotation matrix is up to 5%, while the relative error of the intermediate parameters is about 50% caused by truncation error of image data.关键词：computer vision;Motion estimation;Image sequence processing2|176|1更新时间：2025-12-08
- 摘要：The transform function for geometric transform is approximated by polynomial. As the transform act on the image plane, the computation of the polynomial can be greatly simplified. A recursive algorithm is given in the paper. When realized by systolic architecture parallely, the algorithm needs only the time of one addition for each pixel. The hardware cost is only O（N）, where N is the order of polynomial. A theoretical error analysis is proposed for the whole structure The hardware system for 2 order polynomial transform has been successfully realized. The system can work at the TV rate.关键词：Geometric transform;Systolic;Real time image processing2|67|1更新时间：2025-12-08
- 摘要：For Goppa code with the generating polynomial G（x）, let G（x） be the lowest degree perfect square which is divisible by G（x）, then the minimum distance of this Goppa code d≥deg G（x） +1. In the present paper, we generalize this result to Alternant codes.关键词：Alternant码;子域子码;最小距离;代数几何码2|25|1更新时间：2025-12-08
- 摘要：<正> TENCON’93, The Eighth Annual International Conference of IEEE Region 10, will be held in Beijing on 19th—21stOctober 1993.2|12|0更新时间：2025-12-08
- 摘要：This paper presents a new type of public key cryptosystem. The security of the system mainly depends on a NP-completeness problem （Matrix Cover problem）.关键词：Cryptogram;Matrix cover;linear transform2|28|1更新时间：2025-12-08
- 摘要：Tadao Kasami[1] proposed a decoding method for cyclic codes. This method has higher speed and simple construction. The key point of this method is to find a set of covering polynomials. For a cyclic code, it is difficult to find the set of it’s covering polynomials. We have not had a systematic method to find it. In this paper, we first classify the cyclic codes, then give a upper hound of the number of covering polynomials, and a method to find the set of the covering polynomials for the Ⅱ-type cyclic codes.关键词：error-correcting codes;cyclic codes;decoding2|17|0更新时间：2025-12-08
- 摘要：In this paper, the error-correcting performance formula of generalized M-public-key cryptosystem is presented. The discussion on the relationship between parameterst, W（Z） and the securlty, error-correcting performance of the system is made, and the parameter optimization approaches are given.关键词：information theory;cryptology;Public-key cryptosystem;M-public-key system4|52|2更新时间：2025-12-08
- 摘要：The general definition of m-quasiperfect binary array is presented and studied for the first time. New results about the spectrum, volume and balance properties are showed. Especially a few new construction methods for the （quasi） perfect binary arrays are found. By these new methods, infinite families of （quasi） perfect binary arrays can be easily formed. Open problems are also listed.关键词：information theory;Perfect binary arrays;Arrays;signal theory2|26|8更新时间：2025-12-08
- 摘要：In this paper, we propose a neural network approach for radar multitarget tracking. The simulated results show that the method is very useful for improving the accuracy of tracking.关键词：multitarget tracking;Neural network.3|106|4更新时间：2025-12-08
- 摘要：The synthesising method of a new class of polyphase pulse compression codes-NLFM codes is introduced, and the properties of such code are investigated in detail. The NLFM polyphase code, derived from sampling and quantization of non-linear FM waveforms, has attractive features such as low range sidelobe, insensitivity to Doppler effect, and etc. It is shown that the NLFM code is superior to the Frank code.关键词：Radar signal;Signal design;pulse compression.2|89|4更新时间：2025-12-08
- 摘要：According to a general multipath propagation model of land mobile radio communication, a simulation method for the mobile radio channel with the complex-valued impulse response is presented. The fading correlation is naturally contained in the simulation results. By using four adjustable parameters, the fading distribution of different sorts that may be Rayleigh, Rice or other fading modes can be discribed Some progress has been made in application of this method to the analysis of burst error rate caused by the multipath fading.关键词：mobile communication;multipath propagation;Impulse response;Radio channel simulation4|162|1更新时间：2025-12-08
- 摘要：The proposed parallel algorithm of multidimensional recursive digital filtering does not cause any additional arithmetic operations, compared with the conventional sequential filter algorithm. The condition on filter coefficients for fully parallel processing is derived. The method of diagonal processing is an important special case of the proposed method and the properties of the frequency spectrum of diagonal-sampled data are examined.The proposed parallel algorithm can be efficiently implemented by using pipelined vector processors or special-purpose hardware. In the latter case, full or partial available degree of parallelism can be used.关键词：Parallel processing;Multidimensional filter2|45|0更新时间：2025-12-08
- 摘要：After the methods of statistical linear discriminant function for pattern recognition have been reviewed and compared, a universal method, Unitive Statistical Linear Discriminant Function Algorithm, is proposed which applies the optimal Rayleigh Quotient as the criterion and applies the new procedure of Dynamic Programming with two optimal policies. It may replace any other methods and will develop and expand new statistical methods, making this kind of algorithms normative, practicable and unitive.关键词：pattern recognition;Linear discriminant function;Statistical dynamic programming approach;Superiorized Rayleigh quotient criterion;Unitive statistical algorithm2|287|1更新时间：2025-12-08
- 摘要：By using the matrix and Hamming weight, this paper gives a new method of correlation immunity research.关键词：Cryptograph;correlation immunity;Hamming weight;Matrix2|33|1更新时间：2025-12-08
- 摘要：This paper, for the first time, presents an order recursive least squares（LS） algorithm for the parameter estimation of Gaussian Markov Random Field （GMRF） model. The symmetric property of the parameters about the neighbor set is used to change the noncausal GMRF model into a causal nonsym metric half-plane （NSHP） supported model. Based on the approximate Toeplitz structure of the coefficient matrix in the normal equation, we derive an order recursive LS algorithm with the computation complexity of O（m3） + O（M2m）MADP, While the direct LS method needs the computation complexity of O（m3） + O（M2m2）, where M2 represents the size of an image and m is the total number of parameters to be estimated.关键词：Random field model;parameter estimation;Recursive algorithms2|189|2更新时间：2025-12-08
- 摘要：In this paper, two new algorithms for MA parameters estimation via higher order cumu-lants are given. when the signal can be considered as the outputs of a linear time-invariant system driven by a non-Gaussian white noise, the new algorithms are simple in computation and accurate in estimation. Finally, the performance of the new algorithms is also analyzed by simulations.关键词：Higher order cumulants;M?model;parameter estimation2|224|5更新时间：2025-12-08
- 摘要：<正> 西安电子科技大学检测与仪器系空域信号处理研究室承担的自适应天线基础技术研究与应用课题,于1991年12月16日通过了由中国电子工业总公司主持的技术鉴定。该项课题由下面的三项技术成果组成: 1.收发兼容工作用本地干扰自适应对消技术 同船、同机、同舰或相距很近时,发射机工作会对接收机的接收质量产生严重影响。传统上采用时分或频分法来解决这一难题。收发兼容工作用本2|30|0更新时间：2025-12-08
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