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2004 Vol. 26, No. 10
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2004, 26(10): 1513-1520.
Abstract:
This paper presents two effective bandwidth estimation methods for connection admission control in satellite ATM networks with Adaptive FEC (AFEC). Due to the dynamic code rate of AFEC, its effect would be taken into account in estimating the effecti...
This paper presents two effective bandwidth estimation methods for connection admission control in satellite ATM networks with Adaptive FEC (AFEC). Due to the dynamic code rate of AFEC, its effect would be taken into account in estimating the effecti...
2004, 26(10): 1521-1526.
Abstract:
This paper focuses on the mobility management in hierarchical multi-hop mobile wireless networks. A mobility management solution is proposed which combines macro mobility management using Logical Home Agent (LHA) and micro mobility management integra...
This paper focuses on the mobility management in hierarchical multi-hop mobile wireless networks. A mobility management solution is proposed which combines macro mobility management using Logical Home Agent (LHA) and micro mobility management integra...
2004, 26(10): 1527-1533.
Abstract:
The MAC layer of the IEEE 802.11 standard adopts an exponential backoff scheme to access media. This paper provides an enhanced backoff scheme, which changes Contending Windows(CW) adaptively by estimating the number of active stations in network to ...
The MAC layer of the IEEE 802.11 standard adopts an exponential backoff scheme to access media. This paper provides an enhanced backoff scheme, which changes Contending Windows(CW) adaptively by estimating the number of active stations in network to ...
2004, 26(10): 1534-1539.
Abstract:
In the Optical Burst Switching (OBS) network, the data channel scheduling is one of key issues. Bandwidth efficiency and QoS support are the two concerned focuses. However, the existing algorithms pay more attentions to bandwidth efficiency. In this ...
In the Optical Burst Switching (OBS) network, the data channel scheduling is one of key issues. Bandwidth efficiency and QoS support are the two concerned focuses. However, the existing algorithms pay more attentions to bandwidth efficiency. In this ...
2004, 26(10): 1540-1547.
Abstract:
This paper presents a novel round robin based fully distributed fair queuing algorithm for IEEE 802.11 WLANs. The proposed algorithm in this paper achieves fair scheduling in a distributed environment by doing a small modification to the distributed ...
This paper presents a novel round robin based fully distributed fair queuing algorithm for IEEE 802.11 WLANs. The proposed algorithm in this paper achieves fair scheduling in a distributed environment by doing a small modification to the distributed ...
2004, 26(10): 1548-1554.
Abstract:
The OFDM transmitter diversity has gotten more attention in recent years. However, OFDM systems are very sensitive to frequency-offset. Therefore, it is necessary to estimate effectively and to compensate frequency-offset in the systems. This paper p...
The OFDM transmitter diversity has gotten more attention in recent years. However, OFDM systems are very sensitive to frequency-offset. Therefore, it is necessary to estimate effectively and to compensate frequency-offset in the systems. This paper p...
2004, 26(10): 1555-1561.
Abstract:
In this paper a novel dynamic channel allocation algorithm based on network optimization in CDMA network is presented. It establishes an integer programming model for CBR services, which does not allocate channel at each time slot but at some time sl...
In this paper a novel dynamic channel allocation algorithm based on network optimization in CDMA network is presented. It establishes an integer programming model for CBR services, which does not allocate channel at each time slot but at some time sl...
2004, 26(10): 1562-1568.
Abstract:
This paper focuses on the anti-interference technique to restrain the interfer-ence of co-channel users while simply introducing the concept of space-time block coding. Anti-interference technique uses the relationship among signals to remove the int...
This paper focuses on the anti-interference technique to restrain the interfer-ence of co-channel users while simply introducing the concept of space-time block coding. Anti-interference technique uses the relationship among signals to remove the int...
2004, 26(10): 1569-1574.
Abstract:
In this paper, a carrier frequency offset estimation and tracking scheme for OFDM is presented. Pilot-Symbol-Aided (PSA) estimation is used to estimate carrier frequency offset in OFDM system, and the carrier frequency tracking applies the cyclic pre...
In this paper, a carrier frequency offset estimation and tracking scheme for OFDM is presented. Pilot-Symbol-Aided (PSA) estimation is used to estimate carrier frequency offset in OFDM system, and the carrier frequency tracking applies the cyclic pre...
2004, 26(10): 1575-1579.
Abstract:
This paper proposed a fast, simple, robust and precise scheme of frequency offset estimation within a great range with lower SNR in the context of the Synchronized Multi-Carrier CDMA plus (SMCC+) system, which is one of the candidate standard of digi...
This paper proposed a fast, simple, robust and precise scheme of frequency offset estimation within a great range with lower SNR in the context of the Synchronized Multi-Carrier CDMA plus (SMCC+) system, which is one of the candidate standard of digi...
2004, 26(10): 1580-1586.
Abstract:
In this paper, the performance of the LDPC coded MIMO system scheme is evaluated through numerical simulations, and according to the belief propagation decoding algorithm of LDPC codes, a combined iterative detection/decoding MAP algorithm based on t...
In this paper, the performance of the LDPC coded MIMO system scheme is evaluated through numerical simulations, and according to the belief propagation decoding algorithm of LDPC codes, a combined iterative detection/decoding MAP algorithm based on t...
2004, 26(10): 1587-1593.
Abstract:
This paper deals with frame detection of OFDM signal with multiple-periodic preambles transmitted over frequency-selective channels and with existence of carrier fre-quency offset. Involving effect of AGC (Automatic Gain Control), frame detection can...
This paper deals with frame detection of OFDM signal with multiple-periodic preambles transmitted over frequency-selective channels and with existence of carrier fre-quency offset. Involving effect of AGC (Automatic Gain Control), frame detection can...
2004, 26(10): 1594-1600.
Abstract:
A new optimum algorithm is proposed for frequency estimation from a train of coherent pulses in additive Gaussian noise, named it as multi-stages frequency estimation algorithm. It is shown to be a optimum algorithm with small computation and high co...
A new optimum algorithm is proposed for frequency estimation from a train of coherent pulses in additive Gaussian noise, named it as multi-stages frequency estimation algorithm. It is shown to be a optimum algorithm with small computation and high co...
2004, 26(10): 1601-1606.
Abstract:
In this paper Parallel Hidden Markov Model (PHMM) made up of several par-allel Markov chains is proposed to fit in with speaker-independent speech recognition. The performance is improved because of the fusion of different models from classification ...
In this paper Parallel Hidden Markov Model (PHMM) made up of several par-allel Markov chains is proposed to fit in with speaker-independent speech recognition. The performance is improved because of the fusion of different models from classification ...
2004, 26(10): 1607-1612.
Abstract:
In this paper, a speaker identification system is proposed based on classify Fea-ture Sub-space Gaussian Mixture Model and Neural Net fusion (FS-GMM/NN) . With clus-tering analysis of the feature vectors, the speakers training feature vectors can be ...
In this paper, a speaker identification system is proposed based on classify Fea-ture Sub-space Gaussian Mixture Model and Neural Net fusion (FS-GMM/NN) . With clus-tering analysis of the feature vectors, the speakers training feature vectors can be ...
2004, 26(10): 1613-1619.
Abstract:
A novel MultiColor Voronoi Classifier (MCVC) is proposed, which can be ap-plied to linear and nonlinear classification problems. MCVC has sound ability to expend classification plane between samples. With increment of samples, it can be shown that th...
A novel MultiColor Voronoi Classifier (MCVC) is proposed, which can be ap-plied to linear and nonlinear classification problems. MCVC has sound ability to expend classification plane between samples. With increment of samples, it can be shown that th...
2004, 26(10): 1620-1625.
Abstract:
In this paper, a new digital watermarking algorithm based on LU decomposition of matrix is proposed. In order to apply LU decomposition, the corresponding nonnegative matrix of the image is transformed into G-diagonally dominant matrix. In the course...
In this paper, a new digital watermarking algorithm based on LU decomposition of matrix is proposed. In order to apply LU decomposition, the corresponding nonnegative matrix of the image is transformed into G-diagonally dominant matrix. In the course...
2004, 26(10): 1626-1630.
Abstract:
An Improved Iterative Reprojection Reconstruction (IIRR) from a view of in-tegral equation for incomplete image reconstruction is presented in this paper. IIRR is convergence under L~2 norm. The convergent velocity and the error of the reconstructed ...
An Improved Iterative Reprojection Reconstruction (IIRR) from a view of in-tegral equation for incomplete image reconstruction is presented in this paper. IIRR is convergence under L~2 norm. The convergent velocity and the error of the reconstructed ...
2004, 26(10): 1631-1637.
Abstract:
A problem in an algorithm to estimate frequency and orientation of each arrival signal with uniform circular-shaped antenna array is introduced, and a resolvent of this problem is put forward in the paper. The algorithm quoted in this paper includes ...
A problem in an algorithm to estimate frequency and orientation of each arrival signal with uniform circular-shaped antenna array is introduced, and a resolvent of this problem is put forward in the paper. The algorithm quoted in this paper includes ...
2004, 26(10): 1638-1644.
Abstract:
Based on the theory of integral multiwavelet transformation, the representation of 1/f signal (not near-1/f signal) is explored by inverse integral multiwavelet transforma-tion, and the conditions of representing 1/f signal are acquired. The statisti...
Based on the theory of integral multiwavelet transformation, the representation of 1/f signal (not near-1/f signal) is explored by inverse integral multiwavelet transforma-tion, and the conditions of representing 1/f signal are acquired. The statisti...
2004, 26(10): 1645-1649.
Abstract:
This paper presents a fast SA(Synthetic Aperture) algorithm based on the high SNR of the subsurface Subsurface Penetrating Radars (SPRs) reflecting signal and the SA algorithm of microwave holographic imaging. With this fast algorithm,the target azim...
This paper presents a fast SA(Synthetic Aperture) algorithm based on the high SNR of the subsurface Subsurface Penetrating Radars (SPRs) reflecting signal and the SA algorithm of microwave holographic imaging. With this fast algorithm,the target azim...
2004, 26(10): 1650-1655.
Abstract:
A new method of pulse compression, match Fourier pulse compression technol-ogy is proposed in this paper. The method can achieve pulse compression to multi-targets echoes in match Fourier domain, and the peak position of each compressed echo changes ...
A new method of pulse compression, match Fourier pulse compression technol-ogy is proposed in this paper. The method can achieve pulse compression to multi-targets echoes in match Fourier domain, and the peak position of each compressed echo changes ...
2004, 26(10): 1656-1660.
Abstract:
A novel fast phase compensation approach based on two-dimensional minimal image entropy is presented in this paper for Inverse Synthetic Aperture Radar(ISAR) imaging. Compared with the other methods, the proposed approach has better effect of autofoc...
A novel fast phase compensation approach based on two-dimensional minimal image entropy is presented in this paper for Inverse Synthetic Aperture Radar(ISAR) imaging. Compared with the other methods, the proposed approach has better effect of autofoc...
2004, 26(10): 1661-1667.
Abstract:
Based on the phase correlativity between pluses of Synthetic Aperture Radar (SAR), a new observation method is presented. By the method the SARs location information can be obtained from the characteristics of the observed azimuth chirp signals of SA...
Based on the phase correlativity between pluses of Synthetic Aperture Radar (SAR), a new observation method is presented. By the method the SARs location information can be obtained from the characteristics of the observed azimuth chirp signals of SA...
2004, 26(10): 1668-1674.
Abstract:
Attack simulation plays a key role in testing Intrusion Detection System(IDS). Prom the viewpoint of attack testing, an attack simulation platform is put forward for testing IDS based on virtual machine technology. First of all, the testing aims and ...
Attack simulation plays a key role in testing Intrusion Detection System(IDS). Prom the viewpoint of attack testing, an attack simulation platform is put forward for testing IDS based on virtual machine technology. First of all, the testing aims and ...
2004, 26(10): 1675-1680.
Abstract:
In this paper, author wants to present a new software verification method based on native-compiling technology for embedded system. The method verifies the target system from behavior level, after creating RTOS based software simulator, together with...
In this paper, author wants to present a new software verification method based on native-compiling technology for embedded system. The method verifies the target system from behavior level, after creating RTOS based software simulator, together with...
