最新刊期
卷 ， 期 1 ， 1993
- 摘要：In this paper, the KL （Kullback-Leibler） discreminant information is used as a distance measure of the modified Hidden Markov Model. The analytic formulation of the distance measure is derived, and the convergence is proved. The model distance is given at different size of the training set and different numbers of the states, and the reasonablness of the distance for speech recognition is also shown in the experiments.关键词：speech recognition2|68|4更新时间：2025-12-08
- 摘要：In this paper, a new algorithm for direction of arrival （DOA） estimation is presented. Based on the unique decomposition of signal eigenvectors, we use one or more signal eigenvectors to estimate DOAs by an iterative algorithm. Compared to eigenstructure method, the paper’s algorithm is valid for any cases whether the sources are coherent or not. It also has a significant improvememt in estimate performance at low SNR and has a more flexible form for implementation. Computer simulations have shown the effectiveness of the algorithm.关键词：Array signal processing;DOA estimation;spectral estimation2|162|2更新时间：2025-12-08
- 摘要：Based on simulated annealing technique and linear programming neural network, an annealed linear programming neural network which performs the estimation of parameters of incoherent superimposed sinusoidal signals is proposed in this paper. It may obtain a real time solution by setting up an associated analogue and digital mixed circuit. Simulation results are given to illustrate the excellent performance of the neural networks for estimating and tracking the direction of arrival of plane waves.关键词：neural networks;simulated annealing;spectrum estimation;array signal processing2|43|1更新时间：2025-12-08
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Neural Global Optimization Model for the Continuous Network States with the Fast Simulated-Annealing
摘要：A neural network model with the continuous output states of neurons is proposed to solve the global optimization problems. This model has the property of the fast simulated annealing with the continuous variable states. The implementation of the algorithm and the determination of the parameters are discussed in this paper. Examples are also given.关键词：neural network;global optimization;Fast simulated-annealing;Random walk;energy function2|47|1更新时间：2025-12-08 - 摘要：In this paper, the Hopfield/Tank Model is analyzed theoretically when it is used to solve TSP. Some rules among the parameters are established.关键词：neural network;Hopfield/Tank model;Travelling salesman problem;Parameters rules2|88|2更新时间：2025-12-08
- 摘要：In this paper the performance of HF serial data transmission systems for CW interference rejection is analysed. Analytic expressions for the tap weights and the minimum mean square errors of adaptive equalizer in HF serial systems are obtained. The rate of equalizer convergence in the presence of CW interference is analysed. The analysis and simulation results indicate that the equalizer in HF serial systems can not only track the rapid variation of HF channel but also reject CW interference perfectly.关键词：HF serial data transmission systems;CW interference2|24|0更新时间：2025-12-08
- 摘要：In this paper a new family of P-cell （P is any prime number） pseudorandom sequences （named LZ sequences） is constructed. And it is proved that the new sequences constructed here have ideal periodic autocorrelation property; it is also shown through calculating that the sequences are balanced nonlinear sequences and the equivalent linear span can be very large.关键词：Sequences;Pseudorandom sequences;Multiphase sequences;Spread spectrum sequences;Periodic correlation;Linear span2|104|5更新时间：2025-12-08
- 摘要：Based on the characteristics of multipath propagation in mobile communication, the probability of the “DS/SS dead band” and the conditional distributions of the coherence crest value in the cases of the normal DS/SS and the “DS/SS dead band” are presented in this paper. Finally, the anti-interference performance is compared with probability gain.关键词：DS/SS;multipath propagation;Conrelation2|90|2更新时间：2025-12-08
- 摘要：The parallel combinatory SS communication system is a new approach for information transmission with higher efficiency. The data mapping modulation, by which the information data are mapped as the combinatorial sequence, and the security protocol method of the parallel combinatory SS communication system are presented in this paper. This protocol can be used to secure information and users.关键词：spread spectrum communication;Data modulation;Security protocol2|199|9更新时间：2025-12-08
- 摘要：For unslotted FH-CDMA system with RS-（n,k） coding, the number of interfering transmissions varies throughout the packet duration. In this paper, we present a simple model and discover the essential relationship of interference distribution within the packet interval between N>1 and N=1, where N is the number of interfering transmissions. The packet error probabilitre’s obtained for the first time by averaging in the sense of probability over the distribution of all interference states. Furthermore, the lower bound and approximation methods used presently are shown to be inaccurate by comparison.关键词：Frequency-hop;Code;Packet-error probability2|25|1更新时间：2025-12-08
- 摘要：The famous Berlekamp-Massey iteration algorithm is often used to give the solution of the synthesis problem of the sequence. In this paper, we present a more reasonable mathematical model, the linear homogeneous equations with polynomial coefficients, to describe the synthesis problem. The Grobner base theory in polynomial ring is used to present an efficient algorithm for the mathematical model. It turns out to be a generalization of Euclid’s algorithm. The new algorithm can be used to deduce an efficient decoding for a class of algebraic geometry codes constructed by Justesen.关键词：Synthesis of sequence;Homogeneous polynomial;Homogeneous ideal;Algebraic geometry code;Grobner base;Error-locator polynomial2|41|1更新时间：2025-12-08
- 摘要：Line structure is the most basic structure for a simple polyhedron. In stereo vision, the line structure extraction from a perspective view of a simple polyhedron is the key step for later corresponding problem, recognition and understanding. This paper presents a new method which is based on edge structure information to obtain a line structure of a polyhedron. Using the two-step edge following and edge mending this method finds feature vertices and their structural relations and creates two-dimensional feature description of a polyhedron. It can give a satisfactory result even under the situation of smaller image size of an object.关键词：Line structure of polyhedra;Edge following;Two-dimensional feature description;computer vision2|32|0更新时间：2025-12-08
- 摘要：This paper presents a Fourier transform pair of a stagger-lag autocorrelation function and its power spectral density （PSD）. Some fundamental properties of the stagger-period PSD are discussed. Based on four types of spectrum estimation with uniform periods （BT, LP, ML and LSR） and the stagger-period PSD, this paper describes the principles of the corresponding spectrum estimation with stagger periods, appraises their performances, and gives some application examples.关键词：Power spectrum estimation;Time series analysis;Clutter spectral properties2|126|4更新时间：2025-12-08
- 摘要：In this paper, the transient response of high-speed digital transmission lines terminated with nonlinear networks is simulated by combining the characteristics method with the iterative waveform relaxation algorithm. The advantages of this method over other techniques are simplicity and efficiency. Simulation results show that a considerable reduction of CPU time and memory has been achieved.关键词：Waveform iteration;Highspeed transmission;Digital integration2|39|4更新时间：2025-12-08
- 摘要：With the equivalent definition of binary Bent sequences [1]. a method to generate binary Bent sequences with feedforward network is presented in this short paper. To generate binary Bent sequences with our method is simpler and more rapid than the process in[2].关键词：Feedforward sequences;Bent sequences;cryptography;Spread spectrum communication.2|42|2更新时间：2025-12-08
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