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2001 Vol. 23, No. 8
Display Method:
2001, 23(8): 729-735.
Abstract:
Wavefront curvature defocus effects can occur when Polar Formatting Algorithin(PFA)is used to reconstruct the SAR image. The traditional approach to this situation is simply to limit the size of the scene reconstructed. From the aspect of super-resol...
Wavefront curvature defocus effects can occur when Polar Formatting Algorithin(PFA)is used to reconstruct the SAR image. The traditional approach to this situation is simply to limit the size of the scene reconstructed. From the aspect of super-resol...
2001, 23(8): 736-743.
Abstract:
The image processing of spaceborne Synthetic Aperture Radar (SAR) needs to process enormous amount of data and should accomplish the processing a.s soon as possible, hi order to increase the speed of SAR image processing, the paper presents the Chirp...
The image processing of spaceborne Synthetic Aperture Radar (SAR) needs to process enormous amount of data and should accomplish the processing a.s soon as possible, hi order to increase the speed of SAR image processing, the paper presents the Chirp...
2001, 23(8): 744-750.
Abstract:
In the paper a new kind of reduced-dimension STAP (IV-STAP) is developed. At the same time its performance is compared with that of the 3B-4D-STAP, the 3DT-SAP and the full dimension STAP for there exist array errors or riot.
In the paper a new kind of reduced-dimension STAP (IV-STAP) is developed. At the same time its performance is compared with that of the 3B-4D-STAP, the 3DT-SAP and the full dimension STAP for there exist array errors or riot.
2001, 23(8): 751-757.
Abstract:
This paper discusses the problem of estimating the spatial signature of signals under the gains and phases of sensors unknown with a uniform linear array (ULA). It is utilized the redundant structure of the ULA and subspace-based ESPRIT-like algorith...
This paper discusses the problem of estimating the spatial signature of signals under the gains and phases of sensors unknown with a uniform linear array (ULA). It is utilized the redundant structure of the ULA and subspace-based ESPRIT-like algorith...
2001, 23(8): 758-763.
Abstract:
This paper, taking a view of engineering application and based on the asymp-lotics of signals, analyses practical algorithms and features and limitations in practice of three signal demodulation methods: Hilbert transform method, wavelet based multi-...
This paper, taking a view of engineering application and based on the asymp-lotics of signals, analyses practical algorithms and features and limitations in practice of three signal demodulation methods: Hilbert transform method, wavelet based multi-...
2001, 23(8): 764-771.
Abstract:
This paper proposes an adaptive early packet, discard scheme for TCP over ATM networks. Compared with general early packet discard scheme, this new scheme considerably rcduc.es the buffer size needed in the switch node for given QoS, improves the goo...
This paper proposes an adaptive early packet, discard scheme for TCP over ATM networks. Compared with general early packet discard scheme, this new scheme considerably rcduc.es the buffer size needed in the switch node for given QoS, improves the goo...
2001, 23(8): 772-777.
Abstract:
A new grouped parallel multiuser detector is proposed and the corresponding algorithm is derived in this paper. The complexity of this detector is linear to the number of users and the performance is better than the decorrelating detector. The detect...
A new grouped parallel multiuser detector is proposed and the corresponding algorithm is derived in this paper. The complexity of this detector is linear to the number of users and the performance is better than the decorrelating detector. The detect...
2001, 23(8): 778-784.
Abstract:
It is suggested by Du Huiping(1999) to construct a novel multiple-beam adaptive antenna with Fresnel zone phase-correcting focusing configuration and feeding-array. In order to discover the operating mechanism of this new adaptive antenna, under a co...
It is suggested by Du Huiping(1999) to construct a novel multiple-beam adaptive antenna with Fresnel zone phase-correcting focusing configuration and feeding-array. In order to discover the operating mechanism of this new adaptive antenna, under a co...
2001, 23(8): 785-792.
Abstract:
A micro-machined single crystal beam resonator for high accuracy pressure sensors by utilizing Micro-ElectroMechanical System (MEMS) technology has been successfully fabricated. By means of thermal excitation, the frequency response (including amplit...
A micro-machined single crystal beam resonator for high accuracy pressure sensors by utilizing Micro-ElectroMechanical System (MEMS) technology has been successfully fabricated. By means of thermal excitation, the frequency response (including amplit...
2001, 23(8): 793-801.
Abstract:
In this paper,the test property of fault subnetworks has been discussed based on the fault subnetwork equivalent current vector, and the essential condition for determinting fault subnetworks has been given. Using this method, every subnetwork may be...
In this paper,the test property of fault subnetworks has been discussed based on the fault subnetwork equivalent current vector, and the essential condition for determinting fault subnetworks has been given. Using this method, every subnetwork may be...
2001, 23(8): 809-813.
Abstract:
In this paper, the wavelet transform is used to increase the invisibility of the digital image watermark because it can exploit the temporal and spatial phenomena of human visual system. The more robustness can be achieved if watermarks are first spr...
In this paper, the wavelet transform is used to increase the invisibility of the digital image watermark because it can exploit the temporal and spatial phenomena of human visual system. The more robustness can be achieved if watermarks are first spr...
2001, 23(8): 814-818.
Abstract:
This article analyzes the different needs of RTOS in control system and signal processing system, and gets a conclusion that if reduce the requirement, a system software which gives attention to high efficiency and hardware independence simultaneousl...
This article analyzes the different needs of RTOS in control system and signal processing system, and gets a conclusion that if reduce the requirement, a system software which gives attention to high efficiency and hardware independence simultaneousl...
2001, 23(8): 819-823.
Abstract:
A new hybrid genetic algorithm (HGA) that incorporates the flexible polyhedron method into the conventional genetic algorithm is proposed. The HGA speeds up convergence before the genetic algorithm reachs the global optima, and achieves better perfor...
A new hybrid genetic algorithm (HGA) that incorporates the flexible polyhedron method into the conventional genetic algorithm is proposed. The HGA speeds up convergence before the genetic algorithm reachs the global optima, and achieves better perfor...
2001, 23(8): 824-828.
Abstract:
In this paper, a new method of synchronization using only software, which is applied to Digital Signal s Spectrum Coding (DSSC) for data transmission, is discussed. The step and the approach to achieve synchronization are presented. The advantage of ...
In this paper, a new method of synchronization using only software, which is applied to Digital Signal s Spectrum Coding (DSSC) for data transmission, is discussed. The step and the approach to achieve synchronization are presented. The advantage of ...
2001, 23(8): 829-832.
Abstract:
In this paper, a method to improve the period property of (quasi-)chaotic digital filters by inserting a nonlinear transfer function is presented. Simulation results show that the resulted chaotic sequences have siginificantly increased periods while...
In this paper, a method to improve the period property of (quasi-)chaotic digital filters by inserting a nonlinear transfer function is presented. Simulation results show that the resulted chaotic sequences have siginificantly increased periods while...
2001, 23(8): 802-808.
Abstract:
The difficulties that exist in classical electromagnetic field theory are discussed and it is pointed out that the Maxwell s equation set in classical theory is not self-consistent and only the approximate solutions can be gotten in classical electro...
The difficulties that exist in classical electromagnetic field theory are discussed and it is pointed out that the Maxwell s equation set in classical theory is not self-consistent and only the approximate solutions can be gotten in classical electro...
