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1997 Vol. 19, No. 2
Display Method:
1997, 19(2): 145-151.
Abstract:
This paper proposes an adaptive identification algorithm for nonminimum phase ARMA models in additive colored Gaussian noise. The model input is assumed to be an i. i. d., non-Gaussian random process. The algorithm utilizes higher-order statistics of...
This paper proposes an adaptive identification algorithm for nonminimum phase ARMA models in additive colored Gaussian noise. The model input is assumed to be an i. i. d., non-Gaussian random process. The algorithm utilizes higher-order statistics of...
1997, 19(2): 152-157.
Abstract:
A novel blind estimate of direction of arrival (DOA) and Doppler frequency with unknown array manifold is proposed, employing Doppler frequency difference between a successive pulses as rotational parameter. The effectiveness of the new method is con...
A novel blind estimate of direction of arrival (DOA) and Doppler frequency with unknown array manifold is proposed, employing Doppler frequency difference between a successive pulses as rotational parameter. The effectiveness of the new method is con...
1997, 19(2): 158-165.
Abstract:
The group correlation properties of binary sequences is studied. And a conclusion is drawn that not only the group correlation function of a binary sequence itself is ideal, but also that of some of its subsets, when code length N is even, is ideal. ...
The group correlation properties of binary sequences is studied. And a conclusion is drawn that not only the group correlation function of a binary sequence itself is ideal, but also that of some of its subsets, when code length N is even, is ideal. ...
1997, 19(2): 166-172.
Abstract:
The least squares(LS) minimization problem constitutes the core of many real-time signal processing problems. A square root free scaled Givens rotations algorithm and its systolic architecture for the optimal RLS residual evaluation are presented in ...
The least squares(LS) minimization problem constitutes the core of many real-time signal processing problems. A square root free scaled Givens rotations algorithm and its systolic architecture for the optimal RLS residual evaluation are presented in ...
1997, 19(2): 173-176.
Abstract:
A new image edge detection algorithm which utilizes the wavelet transform theory is proposed. A symmetric scaling function corresponding to (c0,c3) = (0.05,0.05) is used to perform the dyadic wavelet transform. The authors get a multiresolution image...
A new image edge detection algorithm which utilizes the wavelet transform theory is proposed. A symmetric scaling function corresponding to (c0,c3) = (0.05,0.05) is used to perform the dyadic wavelet transform. The authors get a multiresolution image...
1997, 19(2): 177-182.
Abstract:
This paper presents a tone recognizer for Mandarin speech using a combination of wavelet transforming and hiddefi Markov modeling techniques. The evaluation of pitch periods is exactly performed by a pitch detector which is based on the singularity d...
This paper presents a tone recognizer for Mandarin speech using a combination of wavelet transforming and hiddefi Markov modeling techniques. The evaluation of pitch periods is exactly performed by a pitch detector which is based on the singularity d...
1997, 19(2): 183-189.
Abstract:
Detection of primitives in images is often needed in pattern recognition and machine vision. This paper proposes a method for the search of circles in images using a genetic algorithm, as an example of detection of primitives. The experimental result...
Detection of primitives in images is often needed in pattern recognition and machine vision. This paper proposes a method for the search of circles in images using a genetic algorithm, as an example of detection of primitives. The experimental result...
1997, 19(2): 190-194.
Abstract:
Neural network BP training algorithm based on gradient descend technique may lead to entrapment in local optimum so that the network inaccurately classifies input patterns. This paper presents a hybrid training algorithm GA-QP combined to genetic alg...
Neural network BP training algorithm based on gradient descend technique may lead to entrapment in local optimum so that the network inaccurately classifies input patterns. This paper presents a hybrid training algorithm GA-QP combined to genetic alg...
1997, 19(2): 195-201.
Abstract:
The automatic target detector for High Resolution Radar(HRR) is considered. The detection performance of HRR is very important for target recongnition and imaging. Due to the size of the target is larger than the range resolution cell of the radar, t...
The automatic target detector for High Resolution Radar(HRR) is considered. The detection performance of HRR is very important for target recongnition and imaging. Due to the size of the target is larger than the range resolution cell of the radar, t...
1997, 19(2): 202-208.
Abstract:
The chaotic secure communication method proposed by D. R. Frey (1993) is studied. The system is composed of regressive nonlinear digital filters. Several practical aspects of the communication are analyzed, such as the correlation functions, the tole...
The chaotic secure communication method proposed by D. R. Frey (1993) is studied. The system is composed of regressive nonlinear digital filters. Several practical aspects of the communication are analyzed, such as the correlation functions, the tole...
1997, 19(2): 209-213.
Abstract:
Trellis structures of block codes are discussed. L-section trellis structures of some BCH codes are presented. A fast maximum likelihood decoding algorithm for BCH codes is proposed correspondingly, Decoding porblem of q-ary images of qm-ary block co...
Trellis structures of block codes are discussed. L-section trellis structures of some BCH codes are presented. A fast maximum likelihood decoding algorithm for BCH codes is proposed correspondingly, Decoding porblem of q-ary images of qm-ary block co...
1997, 19(2): 214-216.
Abstract:
As the second part of author s serial research (1988), the cipher significant and structure properties of H-Boolean functions are investigated in further by the characteristic matrix. The best updated lower bounds are found for the enumeration of H-B...
As the second part of author s serial research (1988), the cipher significant and structure properties of H-Boolean functions are investigated in further by the characteristic matrix. The best updated lower bounds are found for the enumeration of H-B...
1997, 19(2): 217-223.
Abstract:
All digital implementation of receiver is a main topic on digital communication recently. The design of interpolation filter is one of the important problems for all digital implementation of receiver. In this paper, for full response linear modulati...
All digital implementation of receiver is a main topic on digital communication recently. The design of interpolation filter is one of the important problems for all digital implementation of receiver. In this paper, for full response linear modulati...
1997, 19(2): 224-230.
Abstract:
The problem of computing the free distance of TCM signal sequence has been discussed, a new algorithm--the matrix algorithm, is proposed, and the estimation problem of state transition number required for computing the free distance of TCM signal seq...
The problem of computing the free distance of TCM signal sequence has been discussed, a new algorithm--the matrix algorithm, is proposed, and the estimation problem of state transition number required for computing the free distance of TCM signal seq...
1997, 19(2): 231-237.
Abstract:
This paper points out that in micro-cell situation, that is the cell s radius is between 100m and 200m, the cell s basestation can transmit the bit-synchronous information, and all the mobile phones of the cell can be bit-synchronous on the up-link a...
This paper points out that in micro-cell situation, that is the cell s radius is between 100m and 200m, the cell s basestation can transmit the bit-synchronous information, and all the mobile phones of the cell can be bit-synchronous on the up-link a...
1997, 19(2): 238-244.
Abstract:
On the basis of considering downlink power flux density limit, shadowing effect, frequency reuse in different systems and adjoining spots of same system, adopting voice activity and polarization isolation techniques, the capacity of CDMA mobile satel...
On the basis of considering downlink power flux density limit, shadowing effect, frequency reuse in different systems and adjoining spots of same system, adopting voice activity and polarization isolation techniques, the capacity of CDMA mobile satel...
1997, 19(2): 245-250.
Abstract:
By analyzing the threshold-jumping of Schmitt circuits, this paper indicates that the core element realizing this function in binary TTL Schmitt circuits is the differential current switch with controllable threshold value. Based on the characteristi...
By analyzing the threshold-jumping of Schmitt circuits, this paper indicates that the core element realizing this function in binary TTL Schmitt circuits is the differential current switch with controllable threshold value. Based on the characteristi...
1997, 19(2): 251-257.
Abstract:
A methodology to synthesise continous-time current-mode filters using CMOS OTAs is presented. Second-order CMOS-OTA current fllters are systematically generated from the simulation of signal flow graph for a general biquadratic function .The non-idea...
A methodology to synthesise continous-time current-mode filters using CMOS OTAs is presented. Second-order CMOS-OTA current fllters are systematically generated from the simulation of signal flow graph for a general biquadratic function .The non-idea...
1997, 19(2): 258-262.
Abstract:
Using the fluid model and making the plasma as isotropic medium, the microwave field in a cylindrical cavity is obtained. Coupled with fluid equations for the electron and ion motion, the microwave discharge courses are calculated. The results show t...
Using the fluid model and making the plasma as isotropic medium, the microwave field in a cylindrical cavity is obtained. Coupled with fluid equations for the electron and ion motion, the microwave discharge courses are calculated. The results show t...
1997, 19(2): 263-264.
Abstract:
This paper point out that there is no n 13 Barker code concluded by Yang Guangzheng(1995) is not correct. So it is still a conjecture that there is no n 13 Barker codes.
This paper point out that there is no n 13 Barker code concluded by Yang Guangzheng(1995) is not correct. So it is still a conjecture that there is no n 13 Barker codes.
1997, 19(2): 265-268.
Abstract:
This paper presents an image segmentation approach which is based on fuzzy-neural-network hybrid system(FNNHS). This approach can use the empirical knowledge and the ability of neural networks which learn knowledge from the examples, to obtain the we...
This paper presents an image segmentation approach which is based on fuzzy-neural-network hybrid system(FNNHS). This approach can use the empirical knowledge and the ability of neural networks which learn knowledge from the examples, to obtain the we...
1997, 19(2): 269-273.
Abstract:
Multipath time delay estimation is constrained by the width of the signal correlation function when using correlation method. This paper obtains a high resolution tune delay estimation by introducing Burg and Marple algorithm of the maximum entropy p...
Multipath time delay estimation is constrained by the width of the signal correlation function when using correlation method. This paper obtains a high resolution tune delay estimation by introducing Burg and Marple algorithm of the maximum entropy p...
1997, 19(2): 274-277.
Abstract:
Prom a polynomial ideal point of view, a general algebraic method for decoding Goppa codes is presented. It is shown that such a method can correct t = [(d - 1)/2] errors, where d is the true minimum distance of the given Goppa code.
Prom a polynomial ideal point of view, a general algebraic method for decoding Goppa codes is presented. It is shown that such a method can correct t = [(d - 1)/2] errors, where d is the true minimum distance of the given Goppa code.
1997, 19(2): 278-281.
Abstract:
Based on a one-way function, this paper proposed an authentication-doubled access control scheme for information protection system. The scheme is safer than the previously proposed schemes. In the scheme, the user s secret key is used not only for co...
Based on a one-way function, this paper proposed an authentication-doubled access control scheme for information protection system. The scheme is safer than the previously proposed schemes. In the scheme, the user s secret key is used not only for co...
1997, 19(2): 282-285.
Abstract:
The constitution, technical features and working mode of the real-time onboard displaying system of Airborne SAR real-time digital imaging processor are studied systematically. And the special development of the display board under the real-time syst...
The constitution, technical features and working mode of the real-time onboard displaying system of Airborne SAR real-time digital imaging processor are studied systematically. And the special development of the display board under the real-time syst...
1997, 19(2): 286-288.
Abstract:
This paper gives the calculating and testing method for the parameters of materials of low loss and high dielectric constant in the millimeter-wave-band. The measuring principle. and the testing system are introduced. The measuring results are given....
This paper gives the calculating and testing method for the parameters of materials of low loss and high dielectric constant in the millimeter-wave-band. The measuring principle. and the testing system are introduced. The measuring results are given....
