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2005 Vol. 27, No. 8
Display Method:
2005, 27(8): 1177-1181.
Abstract:
A new algorithm named optimal matching based on spatial relationship in local regions for content-based image retrieval is proposed in this paper. The algorithm first employs the symbol mapping model to reduce a symbolic image to a l-D representation...
A new algorithm named optimal matching based on spatial relationship in local regions for content-based image retrieval is proposed in this paper. The algorithm first employs the symbol mapping model to reduce a symbolic image to a l-D representation...
2005, 27(8): 1182-1186.
Abstract:
The framework for image singularity analysis based on multifractal theory is presented in this paper. The measure is defined which gives the local distribution of the gradient of the image. The exponential formalism between the projection of fast dec...
The framework for image singularity analysis based on multifractal theory is presented in this paper. The measure is defined which gives the local distribution of the gradient of the image. The exponential formalism between the projection of fast dec...
2005, 27(8): 1187-1192.
Abstract:
A novel watermarking scheme to ensure the credibility of audio is proposed in this paper. Psychoacoustic model controls the wavelet packet decomposition as well as the watermark insertion in the wavelet packet domain, which enhances both the transpar...
A novel watermarking scheme to ensure the credibility of audio is proposed in this paper. Psychoacoustic model controls the wavelet packet decomposition as well as the watermark insertion in the wavelet packet domain, which enhances both the transpar...
2005, 27(8): 1193-1196.
Abstract:
Discrete Ambiguity Function （DAF） is used to estimate parameters of LFM signal after improving SNR based on recomposing sequences. This method does not add the number of the sampling data and ensures real-time processing, but can improve the precisio...
Discrete Ambiguity Function （DAF） is used to estimate parameters of LFM signal after improving SNR based on recomposing sequences. This method does not add the number of the sampling data and ensures real-time processing, but can improve the precisio...
2005, 27(8): 1197-1200.
Abstract:
A new method for signal subspace fitting is presented. Firstly, a novel criterion of signal subspace fitting is derived. It is shown that the correct knowledge of the number of signals is unnecessary since the columns of the signal subspace can be mu...
A new method for signal subspace fitting is presented. Firstly, a novel criterion of signal subspace fitting is derived. It is shown that the correct knowledge of the number of signals is unnecessary since the columns of the signal subspace can be mu...
2005, 27(8): 1201-1204.
Abstract:
According to the theory of the fractional lower order statistical signal processing and the characteristics of ship radiated noises, this paper proposes a new noise model of underwater acoustic signals. The reasons of performance degenerate are analy...
According to the theory of the fractional lower order statistical signal processing and the characteristics of ship radiated noises, this paper proposes a new noise model of underwater acoustic signals. The reasons of performance degenerate are analy...
2005, 27(8): 1205-1207.
Abstract:
The iterative form of the Super-Exponential （SE） algorithm has good convergence capability, but its complexity increases with the square of the equalizer length, which makes it unsuitable for hardware implementation. According to the properties of sp...
The iterative form of the Super-Exponential （SE） algorithm has good convergence capability, but its complexity increases with the square of the equalizer length, which makes it unsuitable for hardware implementation. According to the properties of sp...
2005, 27(8): 1208-1212.
Abstract:
The digital phase-locked loops design is a key technology for carrier and bit synchronization in coherent demodulation digital receiver. Large frequency offset and low SNR add more difficulties of the loop design from two different ways. Based on thi...
The digital phase-locked loops design is a key technology for carrier and bit synchronization in coherent demodulation digital receiver. Large frequency offset and low SNR add more difficulties of the loop design from two different ways. Based on thi...
2005, 27(8): 1213-1216.
Abstract:
Estimation of Doppler central frequency has an important effect to accuracy of fixed position in the fixing approach with no reference points for ocean SAR. The effect of Signal-Noise-Ration （SNR） to the estimation of Doppler central frequency has be...
Estimation of Doppler central frequency has an important effect to accuracy of fixed position in the fixing approach with no reference points for ocean SAR. The effect of Signal-Noise-Ration （SNR） to the estimation of Doppler central frequency has be...
2005, 27(8): 1217-1221.
Abstract:
It is a challenge for Space Time Adaptive Processing （STAP） in non-homogeneous environment. Thus, a new maximum likelihood method to moving target detection for phased Airborne Early Warning （AEW） radar is presented in this paper. This new method has...
It is a challenge for Space Time Adaptive Processing （STAP） in non-homogeneous environment. Thus, a new maximum likelihood method to moving target detection for phased Airborne Early Warning （AEW） radar is presented in this paper. This new method has...
2005, 27(8): 1222-1225.
Abstract:
This paper, based on the physical model of optically phased array, analyzes the relationship between the number of subarray and the sidelobe level and mainlobe deviation. It gives the realization process of the algorithm based on the combining the si...
This paper, based on the physical model of optically phased array, analyzes the relationship between the number of subarray and the sidelobe level and mainlobe deviation. It gives the realization process of the algorithm based on the combining the si...
The Structure and Implementation of the Two-Frame Corner Turn Memory（CTM）in Real Time Imaging of SAR
2005, 27(8): 1226-1228.
Abstract:
The Corner Turn Memory（CTM） for real time imaging of the Synthetic Aperture Radar（SAR）is presented in this paper. Two types of structure of CTM： the three-frame and the two-frame are discussed, of which the merits and flaws are compared. The represen...
The Corner Turn Memory（CTM） for real time imaging of the Synthetic Aperture Radar（SAR）is presented in this paper. Two types of structure of CTM： the three-frame and the two-frame are discussed, of which the merits and flaws are compared. The represen...
2005, 27(8): 1229-1232.
Abstract:
A new and powerful method for detecting moving targets in a synthetic aperture radar（SAR） image is presented. Phase errors induced by many moving targets are largely quadratic, which provides a basis, by way of a change in the Doppler rate, for estim...
A new and powerful method for detecting moving targets in a synthetic aperture radar（SAR） image is presented. Phase errors induced by many moving targets are largely quadratic, which provides a basis, by way of a change in the Doppler rate, for estim...
2005, 27(8): 1233-1236.
Abstract:
In this paper, the factors that affect the Block Adaptive Vector Quantization （BAVQ） compression performance are analyzed, which are the Signal to compression Noise Ratio （SNR） of Block Adaptive Quantization （BAQ）, the encoding algorithm computation ...
In this paper, the factors that affect the Block Adaptive Vector Quantization （BAVQ） compression performance are analyzed, which are the Signal to compression Noise Ratio （SNR） of Block Adaptive Quantization （BAQ）, the encoding algorithm computation ...
2005, 27(8): 1237-1239.
Abstract:
Firstly, the principle of pseudo-random code modulation based on double-balance modulator is analyzed. On this basis, a new combined modulated fuze-pseudo-random code phase-modulation and sine AM combined modulated fuze is advanced. And the principle...
Firstly, the principle of pseudo-random code modulation based on double-balance modulator is analyzed. On this basis, a new combined modulated fuze-pseudo-random code phase-modulation and sine AM combined modulated fuze is advanced. And the principle...
2005, 27(8): 1240-1243.
Abstract:
In waveform storage LFM generator design, quantization precision, clock jitter, D/A converter linear error and output performance distortion cause rise of side label in pulse compression result. The paper analyses these effects and gives quantized re...
In waveform storage LFM generator design, quantization precision, clock jitter, D/A converter linear error and output performance distortion cause rise of side label in pulse compression result. The paper analyses these effects and gives quantized re...
2005, 27(8): 1244-1248.
Abstract:
Multispectral imaging has been widely used in the field of remote sensing. The storage and transmission of large volumes of multispectral data have become significant concerns. Therefore efficient compression is required for storage and transmission....
Multispectral imaging has been widely used in the field of remote sensing. The storage and transmission of large volumes of multispectral data have become significant concerns. Therefore efficient compression is required for storage and transmission....
2005, 27(8): 1249-1253.
Abstract:
More and more attention has been paid to the study of moving object segmentation in MPEG compressed domain these years, which has already developed into a practical technology. In this paper, an algorithm by using motion vectors and DCT coefficients ...
More and more attention has been paid to the study of moving object segmentation in MPEG compressed domain these years, which has already developed into a practical technology. In this paper, an algorithm by using motion vectors and DCT coefficients ...
2005, 27(8): 1258-1263.
Abstract:
The uplink of a space-time block coded MC-CDMA system equipped with a uniform linear array at the base station of macrocellular is studied. A blind estimation algorithm is proposed to provide the closed-form solutions of both the transmitted symbol s...
The uplink of a space-time block coded MC-CDMA system equipped with a uniform linear array at the base station of macrocellular is studied. A blind estimation algorithm is proposed to provide the closed-form solutions of both the transmitted symbol s...
2005, 27(8): 1264-1268.
Abstract:
A solution of Ultra-Wide Band（UWB） communication systems based on Cyclic Prefix and Pulse Modulations （UWB-CP/PM） and its corresponding signal processing algorithms are presented for short-range wireless networks in this paper. Borrowing the basic id...
A solution of Ultra-Wide Band（UWB） communication systems based on Cyclic Prefix and Pulse Modulations （UWB-CP/PM） and its corresponding signal processing algorithms are presented for short-range wireless networks in this paper. Borrowing the basic id...
2005, 27(8): 1269-1273.
Abstract:
This paper gives a serial acquisition method which can be easily implemented in time hopping ultra-wide band system. Based on this method, the acquisition performance in the multiuser environment is analyzed, and the relationships between the detecti...
This paper gives a serial acquisition method which can be easily implemented in time hopping ultra-wide band system. Based on this method, the acquisition performance in the multiuser environment is analyzed, and the relationships between the detecti...
2005, 27(8): 1274-1277.
Abstract:
A novel differential detection method, called Frequency Domain Spread Spectrum Chip-Level Differential Detection （FD-SS-CLDD） is proposed in frequency domain spread spectrum system. The Moment Generating Function （MGF） of decision variable and a sadd...
A novel differential detection method, called Frequency Domain Spread Spectrum Chip-Level Differential Detection （FD-SS-CLDD） is proposed in frequency domain spread spectrum system. The Moment Generating Function （MGF） of decision variable and a sadd...
2005, 27(8): 1278-1281.
Abstract:
In this paper adaptive modulation in Frequency Division Duplexing(FDD)communications over a fading channel is studied and packet structure and structure of adaptive modulation are proposed. Further, influence of multiplication of Doppler frequency an...
In this paper adaptive modulation in Frequency Division Duplexing(FDD)communications over a fading channel is studied and packet structure and structure of adaptive modulation are proposed. Further, influence of multiplication of Doppler frequency an...
2005, 27(8): 1282-1286.
Abstract:
In this paper the error-correcting performance of frequency transition function for Differential Frequency Hopping （DFH） communication system is analyzed first. Then a Viterbi algorithm is proposed and applied to frequency sequence decoding of DFH re...
In this paper the error-correcting performance of frequency transition function for Differential Frequency Hopping （DFH） communication system is analyzed first. Then a Viterbi algorithm is proposed and applied to frequency sequence decoding of DFH re...
2005, 27(8): 1290-1294.
Abstract:
A concept of weighted reliability index normalized by the total capacity called index of macroscopic reliability is introduced in this paper to evaluate reliability of broadband network comprehensively and objectively. This index combines communicati...
A concept of weighted reliability index normalized by the total capacity called index of macroscopic reliability is introduced in this paper to evaluate reliability of broadband network comprehensively and objectively. This index combines communicati...
2005, 27(8): 1295-1298.
Abstract:
Fiber links, because of sharing some common physical resources （such as fiber cable, conduit, right of way, etc.）, have certain failure-dependent. The term Shared Risk Link Groups （SRLG） is introduced to describe the relationship between links with s...
Fiber links, because of sharing some common physical resources （such as fiber cable, conduit, right of way, etc.）, have certain failure-dependent. The term Shared Risk Link Groups （SRLG） is introduced to describe the relationship between links with s...
2005, 27(8): 1299-1303.
Abstract:
Considering both the survivability and traffic grooming, a differentiated shared protection algorithm using wavelength layered-graph called PSPTG, which means Partial Shared-path Protection algorithm supporting Traffic Grooming, is proposed. In this ...
Considering both the survivability and traffic grooming, a differentiated shared protection algorithm using wavelength layered-graph called PSPTG, which means Partial Shared-path Protection algorithm supporting Traffic Grooming, is proposed. In this ...
2005, 27(8): 1304-1309.
Abstract:
This paper presents a method of information hiding based on the digital-position information, bringing forward an augmented identity matrix and a definite arithmetic upon it. In this method, if the single digital-position information is used, embeddi...
This paper presents a method of information hiding based on the digital-position information, bringing forward an augmented identity matrix and a definite arithmetic upon it. In this method, if the single digital-position information is used, embeddi...
2005, 27(8): 1310-1314.
Abstract:
As emergence of several access methods, many LANs use access of dynamic IP address. Virtual Private Network（VPN）of static configuration is not applicable. Thus, how to exchange information, construct VPN in dynamic network is indicated as new questio...
As emergence of several access methods, many LANs use access of dynamic IP address. Virtual Private Network（VPN）of static configuration is not applicable. Thus, how to exchange information, construct VPN in dynamic network is indicated as new questio...
2005, 27(8): 1315-1319.
Abstract:
A Priority BackoffAIgorithm （PBA） for IEEE 802.11 DCF is presented in this paper. The basic idea of PBA is each station should collect statistical data of other stations＇ transmission while sensing the channel, and maintaining a sent data table for a...
A Priority BackoffAIgorithm （PBA） for IEEE 802.11 DCF is presented in this paper. The basic idea of PBA is each station should collect statistical data of other stations＇ transmission while sensing the channel, and maintaining a sent data table for a...
2005, 27(8): 1320-1323.
Abstract:
This paper firstly presents a novel estimation technology EWMA （double Exponential Weighted Moving Average）, which employs two EWMA filters to measure data, overcomes the defect that traditional EWMA estimation technology does not achieve fine agilit...
This paper firstly presents a novel estimation technology EWMA （double Exponential Weighted Moving Average）, which employs two EWMA filters to measure data, overcomes the defect that traditional EWMA estimation technology does not achieve fine agilit...
2005, 27(8): 1324-1327.
Abstract:
A Traffic Engineering Algorithm Supporting QoS in MPLS Networks
A Traffic Engineering Algorithm Supporting QoS in MPLS Networks
2005, 27(8): 1335-1337.
Abstract:
In this paper, the construction of complementary sequence pairs are studied, and a new constructional method is found, with which it can get a complementary sequence pairs of length MN by a complementary sequence pairs of length M and a complementary...
In this paper, the construction of complementary sequence pairs are studied, and a new constructional method is found, with which it can get a complementary sequence pairs of length MN by a complementary sequence pairs of length M and a complementary...
2005, 27(8): 1338-1341.
Abstract:
A noncoherent Reduced State Differential Sequence Detection （RSDSD） for Continuous Phase Modulation （CPM） is proposed in this paper, The algorithm makes use of the reduced state trellis based on Reduced State Sequence Detection （RSSD） and performs on...
A noncoherent Reduced State Differential Sequence Detection （RSDSD） for Continuous Phase Modulation （CPM） is proposed in this paper, The algorithm makes use of the reduced state trellis based on Reduced State Sequence Detection （RSSD） and performs on...
2005, 27(8): 1342-1344.
Abstract:
The longitudinal slot array of rectangular waveguide's wider side is analyzed and designed according to the equivalent magnetic current. The parameters of the array are obtained with the method of quasi-Newton, and the inner and external coupling coe...
The longitudinal slot array of rectangular waveguide's wider side is analyzed and designed according to the equivalent magnetic current. The parameters of the array are obtained with the method of quasi-Newton, and the inner and external coupling coe...
2005, 27(8): 1254-1257.
Abstract:
A novel DWPM （Discrete Wavelet Packet Modulation） system with blind channel identification based on Maximum Likelihood （ML） algorithm is studied for multipath fading channel. The Channel State Information （CSI） is obtained with blind channel identifi...
A novel DWPM （Discrete Wavelet Packet Modulation） system with blind channel identification based on Maximum Likelihood （ML） algorithm is studied for multipath fading channel. The Channel State Information （CSI） is obtained with blind channel identifi...
2005, 27(8): 1287-1289.
Abstract:
A new kind of algorithm is proposed which can produce random error vector without looking up the syndrome-error table. An error vector with larger Hamming weight can be produced by mixing a part of the original error vector with the plaintext. A modi...
A new kind of algorithm is proposed which can produce random error vector without looking up the syndrome-error table. An error vector with larger Hamming weight can be produced by mixing a part of the original error vector with the plaintext. A modi...
2005, 27(8): 1328-1334.
Abstract:
Radar High Range Resolution Profiles （HRRP） provide potentially discriminative information on the geometry of target, which has been shown to be promising signatures for radar Automatic Target Recognition （ATR） application. In this paper, we review t...
Radar High Range Resolution Profiles （HRRP） provide potentially discriminative information on the geometry of target, which has been shown to be promising signatures for radar Automatic Target Recognition （ATR） application. In this paper, we review t...
