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2003 Vol. 25, No. 7
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2003, 25(7): 865-870.
Abstract:
The concept of Embedded Text-To-Speech (ETTS) system is first discussed. Then a real time realized Embedded Chinese Text-To-Speech (ECTTS) system based on DSP is introduced. Based on the DSP realization results, the VLSI design scheme of the ECTTS sy...
The concept of Embedded Text-To-Speech (ETTS) system is first discussed. Then a real time realized Embedded Chinese Text-To-Speech (ECTTS) system based on DSP is introduced. Based on the DSP realization results, the VLSI design scheme of the ECTTS sy...
2003, 25(7): 871-877.
Abstract:
As an important aspect in the study of attacks against information hiding and the development of anti-attack techniques, this paper describes a method to compare a pair of perceptibly identical digital images or audio signals in order to single out t...
As an important aspect in the study of attacks against information hiding and the development of anti-attack techniques, this paper describes a method to compare a pair of perceptibly identical digital images or audio signals in order to single out t...
2003, 25(7): 878-883.
Abstract:
The theory of detecting ridges in the modulus of the continuous wavelet transform is presented as well as reconstructing signal by using information on ridges. Application of the theory on speech signal is discussed in detail. Experimental result sho...
The theory of detecting ridges in the modulus of the continuous wavelet transform is presented as well as reconstructing signal by using information on ridges. Application of the theory on speech signal is discussed in detail. Experimental result sho...
2003, 25(7): 884-891.
Abstract:
In this paper, the cyclostationary property of output signal of the system is discussed, when a stationary(or cyclostationary) signal passes a linear period time variant(or time invariant) system. Two kinds of time variant adaptive filter are present...
In this paper, the cyclostationary property of output signal of the system is discussed, when a stationary(or cyclostationary) signal passes a linear period time variant(or time invariant) system. Two kinds of time variant adaptive filter are present...
2003, 25(7): 892-895.
Abstract:
This paper proposes a new algorithm for joint diagonalization of positive definite symmetric matrices and shows that it can be approximated by an independent component analysis problem. The good performance of the algorithm is illustrated with an exa...
This paper proposes a new algorithm for joint diagonalization of positive definite symmetric matrices and shows that it can be approximated by an independent component analysis problem. The good performance of the algorithm is illustrated with an exa...
2003, 25(7): 896-900.
Abstract:
Blind separation of sources consists of recovering a set of signals of which only-instantaneous linear mixing is observed. This paper presents a novel blind source separation method when noises are complex isotropic SaS process. SaS processes can des...
Blind separation of sources consists of recovering a set of signals of which only-instantaneous linear mixing is observed. This paper presents a novel blind source separation method when noises are complex isotropic SaS process. SaS processes can des...
2003, 25(7): 901-906.
Abstract:
A symmetrized weight enumerator of Zk-linear code is defined in this paper. By using discreate Hadamard transform, a symmetrized MacWilliams identity between Zk-linear code and its dual code is given.
A symmetrized weight enumerator of Zk-linear code is defined in this paper. By using discreate Hadamard transform, a symmetrized MacWilliams identity between Zk-linear code and its dual code is given.
2003, 25(7): 907-917.
Abstract:
In this paper, the theory of Hamilton array codes for high dimension and big Hamming distance is proposed. The model of logical topology structure for d- 2k-l,d=2k(k 3) types and the existence topology condition for general high order SM array codes ...
In this paper, the theory of Hamilton array codes for high dimension and big Hamming distance is proposed. The model of logical topology structure for d- 2k-l,d=2k(k 3) types and the existence topology condition for general high order SM array codes ...
2003, 25(7): 918-924.
Abstract:
The problem of estimating the Direction-Of-Arrival(DOA) of multiple source sig-nals far from the sensors using a novel adaptive antenna suggested by Du Huiping(1999) in the presence of spatially white Gaussian noise is addressed based on the Maximum ...
The problem of estimating the Direction-Of-Arrival(DOA) of multiple source sig-nals far from the sensors using a novel adaptive antenna suggested by Du Huiping(1999) in the presence of spatially white Gaussian noise is addressed based on the Maximum ...
2003, 25(7): 925-930.
Abstract:
With the development of communication techniques and digital signal processing techniques, the capability of the communication receiver to identify signal parameters should be improved. In this paper, a blind receiver for MDPSK signal is proposed. Un...
With the development of communication techniques and digital signal processing techniques, the capability of the communication receiver to identify signal parameters should be improved. In this paper, a blind receiver for MDPSK signal is proposed. Un...
2003, 25(7): 931-937.
Abstract:
This paper puts forward a new multilevel chaotic sequence and a multifunction circuit using three-cell CNN chaos, combining the characteristic of CNN with that of the Spread Spectrum System (SSS). It also proposes a scheme of generating the Multileve...
This paper puts forward a new multilevel chaotic sequence and a multifunction circuit using three-cell CNN chaos, combining the characteristic of CNN with that of the Spread Spectrum System (SSS). It also proposes a scheme of generating the Multileve...
2003, 25(7): 938-942.
Abstract:
In this paper, the optimization of channel capacity (equivalent to data throughput) is proposed for variable-rate service, which is solved with the Lagrangian multiplier method based on a simplified BER formula for m-QAM modulation. The closed-form s...
In this paper, the optimization of channel capacity (equivalent to data throughput) is proposed for variable-rate service, which is solved with the Lagrangian multiplier method based on a simplified BER formula for m-QAM modulation. The closed-form s...
2003, 25(7): 943-948.
Abstract:
In long-code used DS/CDMA communication systems, the convergence of perfor-mance is limited by the number of users in multi-stage Linear Soft Decision Parallel Interference Cancellation (LSD-PIC) multiuser detectors. In this paper, the precondition m...
In long-code used DS/CDMA communication systems, the convergence of perfor-mance is limited by the number of users in multi-stage Linear Soft Decision Parallel Interference Cancellation (LSD-PIC) multiuser detectors. In this paper, the precondition m...
2003, 25(7): 949-955.
Abstract:
This paper describes a novel shared memory switch architecture in order to adapt to local area and metroplitan area network s multiple transport speed structures. This new switch can provide variable port speed, variable packet switch, and port s sel...
This paper describes a novel shared memory switch architecture in order to adapt to local area and metroplitan area network s multiple transport speed structures. This new switch can provide variable port speed, variable packet switch, and port s sel...
2003, 25(7): 956-962.
Abstract:
Induction mechanism, extraction methods and classification efficiency of Jet En-gine Modulation (JEM) signatures in the aircraft returns of the conventional radar are studied in this paper. Firstly, induction mechanism of JEM signatures in the aircra...
Induction mechanism, extraction methods and classification efficiency of Jet En-gine Modulation (JEM) signatures in the aircraft returns of the conventional radar are studied in this paper. Firstly, induction mechanism of JEM signatures in the aircra...
2003, 25(7): 963-968.
Abstract:
This paper illustrates that Hopping Frequency (HF) communication and frequency agile radar have chaotic peculiarities, and are chaotic phenomena, with computing singular attractor and their correlative dimensions and Lyapunov exponents from simulatio...
This paper illustrates that Hopping Frequency (HF) communication and frequency agile radar have chaotic peculiarities, and are chaotic phenomena, with computing singular attractor and their correlative dimensions and Lyapunov exponents from simulatio...
2003, 25(7): 969-974.
Abstract:
The Method of Moment (MoM) in conjunction with Pade Approximation In Seg-ments (PAIS) is applied to predict the monostatic Radar Cross-Section (RCS) pattern of an arbitrarily shaped 2-D dielectric object. In the method, integro-differential equation ...
The Method of Moment (MoM) in conjunction with Pade Approximation In Seg-ments (PAIS) is applied to predict the monostatic Radar Cross-Section (RCS) pattern of an arbitrarily shaped 2-D dielectric object. In the method, integro-differential equation ...
2003, 25(7): 975-981.
Abstract:
The eigenvalues of compound waveguide system are solved by using the method of dyadic Greens function by matching the electric and magnetic field on a virtual boundary. As the chosen dyadic Greens function has no singularity and can be calculated by ...
The eigenvalues of compound waveguide system are solved by using the method of dyadic Greens function by matching the electric and magnetic field on a virtual boundary. As the chosen dyadic Greens function has no singularity and can be calculated by ...
2003, 25(7): 982-989.
Abstract:
A new kind of microwave cavity-strongly coupling two-gap cavities, which can be used in broadband multi-beam klystrons that work in lower frequency band, is designed in this paper. The important parameters of the cavity are calculated with ISFEL3D, a...
A new kind of microwave cavity-strongly coupling two-gap cavities, which can be used in broadband multi-beam klystrons that work in lower frequency band, is designed in this paper. The important parameters of the cavity are calculated with ISFEL3D, a...
2003, 25(7): 990-994.
Abstract:
This paper proposes a method for narrowband interference suppression in Direct Sequence Spread System(DS-SS). The distribution of the transform domain data is analysed, and it is approximated by Gaussian distribution. The variance of Gaussian distrib...
This paper proposes a method for narrowband interference suppression in Direct Sequence Spread System(DS-SS). The distribution of the transform domain data is analysed, and it is approximated by Gaussian distribution. The variance of Gaussian distrib...
2003, 25(7): 995-999.
Abstract:
The effect of mutual coupling among array elements on the performance of MUSIC algorithm is investigated. The presence of mutual coupling distorts array response vector and the eigenstructure of the covariance matrix. The Method of Moment (MoM) is us...
The effect of mutual coupling among array elements on the performance of MUSIC algorithm is investigated. The presence of mutual coupling distorts array response vector and the eigenstructure of the covariance matrix. The Method of Moment (MoM) is us...
2003, 25(7): 1000-1005.
Abstract:
In this paper the channel capacity in MIMO system is introduced, then the effects of antenna selection in the transmitter and receiver on channel capacity are analyzed. Simulation results indicate that the transmit antenna selection can increase chan...
In this paper the channel capacity in MIMO system is introduced, then the effects of antenna selection in the transmitter and receiver on channel capacity are analyzed. Simulation results indicate that the transmit antenna selection can increase chan...
