Pub Date : 2007-07-11DOI: 10.1109/ICCCAS.2007.4348245
Xiaojie Zhang, L. Min
The cellular neural/nonlinear network (CNN) has become a new tool for image and signal processing, robotic and biological visions, and higher brain functions. The robust designs for CNN templates are one of the important issues for the practical applications of the CNNs. This paper sets up two new theorems for robust designs of a kind of uncoupled CNNs. The two theorems provide parameter inequalities to determine parameter intervals for implementing prescribed image processing functions, respectively. Four examples for detecting edges and corners in images are presented in order to illustrate the effectiveness of the methodology.
{"title":"Two Theorems on the Robust Designs of a Kind of Uncoupled CNNs with Applications","authors":"Xiaojie Zhang, L. Min","doi":"10.1109/ICCCAS.2007.4348245","DOIUrl":"https://doi.org/10.1109/ICCCAS.2007.4348245","url":null,"abstract":"The cellular neural/nonlinear network (CNN) has become a new tool for image and signal processing, robotic and biological visions, and higher brain functions. The robust designs for CNN templates are one of the important issues for the practical applications of the CNNs. This paper sets up two new theorems for robust designs of a kind of uncoupled CNNs. The two theorems provide parameter inequalities to determine parameter intervals for implementing prescribed image processing functions, respectively. Four examples for detecting edges and corners in images are presented in order to illustrate the effectiveness of the methodology.","PeriodicalId":218351,"journal":{"name":"2007 International Conference on Communications, Circuits and Systems","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117256448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2007-07-11DOI: 10.1109/ICCCAS.2007.6251626
Xiong Wang, Sheng Wang, Lemin Li, Yun Chuan
As multicast applications become widely popular, supporting multicast in all-optical wavelength division multiplexing (WDM) networks becomes an important problem. In this paper, we study multicast routing in sparse splitting WDM networks, in which only a small percentage of nodes are capable of light splitting. Specifically, an efficient sparse splitting constrained multicast routing algorithm called MCNFH is proposed and evaluated by simulations. The results show that the proposed algorithm has better performance in terms of wavelength channel cost and the maximum number of wavelengths per link than existing algorithms.
{"title":"Multicast routing in WDM networks with sparse light splitting","authors":"Xiong Wang, Sheng Wang, Lemin Li, Yun Chuan","doi":"10.1109/ICCCAS.2007.6251626","DOIUrl":"https://doi.org/10.1109/ICCCAS.2007.6251626","url":null,"abstract":"As multicast applications become widely popular, supporting multicast in all-optical wavelength division multiplexing (WDM) networks becomes an important problem. In this paper, we study multicast routing in sparse splitting WDM networks, in which only a small percentage of nodes are capable of light splitting. Specifically, an efficient sparse splitting constrained multicast routing algorithm called MCNFH is proposed and evaluated by simulations. The results show that the proposed algorithm has better performance in terms of wavelength channel cost and the maximum number of wavelengths per link than existing algorithms.","PeriodicalId":218351,"journal":{"name":"2007 International Conference on Communications, Circuits and Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128991197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2007-07-11DOI: 10.1109/ICCCAS.2007.6250855
Bai Xiang, Mao Yu-ming, Sun Xiang
The IEEE 802.11e network provides different with QoS (quality of service) guarantee for different traffic streams. The Enhanced Distributed Channel Access(EDCA) in IEEE 802.11e MAC protocol is proposed to support prioritized QoS on the basis of the Distributed Coordination Function(DCF) in IEEE 802.11. We first build a new network analysis model for the EDCA. The model takes into account both the idle state that represents that there are no packets to be transmitted and differentiation based on different AIFS-value for different traffic. We can use the signal transfer function of the generalized state transition diagram to derive a probability distribution of the MAC layer service time and analyze the performance of EDCA from a non-saturated channel to a saturated medium by using M/G/l/K queuing model. The proposed model is calculated numerically and validated against simulation results, we observed a good match between the analytical model and simulation which conforms the veracity of proposed model. Simulation and theoretical results show that despite providing prioritized QoS, the EDCA still can not support strict QoS for real-time application like voice and video unless network works in the non-saturation case. On the other hand, it is inevitable that there is unfairness of channel access to prioritized traffic due to EDCA.
{"title":"Performance investigation of M/G/1/K-based IEEE802.11e EDCA under non-saturation and saturation conditions","authors":"Bai Xiang, Mao Yu-ming, Sun Xiang","doi":"10.1109/ICCCAS.2007.6250855","DOIUrl":"https://doi.org/10.1109/ICCCAS.2007.6250855","url":null,"abstract":"The IEEE 802.11e network provides different with QoS (quality of service) guarantee for different traffic streams. The Enhanced Distributed Channel Access(EDCA) in IEEE 802.11e MAC protocol is proposed to support prioritized QoS on the basis of the Distributed Coordination Function(DCF) in IEEE 802.11. We first build a new network analysis model for the EDCA. The model takes into account both the idle state that represents that there are no packets to be transmitted and differentiation based on different AIFS-value for different traffic. We can use the signal transfer function of the generalized state transition diagram to derive a probability distribution of the MAC layer service time and analyze the performance of EDCA from a non-saturated channel to a saturated medium by using M/G/l/K queuing model. The proposed model is calculated numerically and validated against simulation results, we observed a good match between the analytical model and simulation which conforms the veracity of proposed model. Simulation and theoretical results show that despite providing prioritized QoS, the EDCA still can not support strict QoS for real-time application like voice and video unless network works in the non-saturation case. On the other hand, it is inevitable that there is unfairness of channel access to prioritized traffic due to EDCA.","PeriodicalId":218351,"journal":{"name":"2007 International Conference on Communications, Circuits and Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129792277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The stochastic resonance phenomenon in a harmonic oscillator with randomizing damping coefficient by asymmetric dichotomous noise is investigated. By using the random average method and Shapiro-Loginov formula, the exact solution of the average output amplitude gain (OAG) is obtained. It is applicable to a stable under-damped, critical-damped or over-damped oscillator. Numerical results show that OAG depend non-monotonically not only on the intensity and the correlation time but also on the asymmetry of the random damping in a stable oscillator in detail, that is, stochastic resonance occurs. The maximum OAG can be achieved in the proper noise. The effect of asymmetric dichotomous noise on OAG versus frequency is similar to decreasing the damping coefficient.
{"title":"Stochastic Resonance in a Harmonic Oscillator with Randomizing Damping by Asymmetric Dichotomous Noise","authors":"Shiqi Jiangu, Feng Guo, Yu-rong Zhou, Tianxiang Gu","doi":"10.1109/ICCCAS.2007.4348225","DOIUrl":"https://doi.org/10.1109/ICCCAS.2007.4348225","url":null,"abstract":"The stochastic resonance phenomenon in a harmonic oscillator with randomizing damping coefficient by asymmetric dichotomous noise is investigated. By using the random average method and Shapiro-Loginov formula, the exact solution of the average output amplitude gain (OAG) is obtained. It is applicable to a stable under-damped, critical-damped or over-damped oscillator. Numerical results show that OAG depend non-monotonically not only on the intensity and the correlation time but also on the asymmetry of the random damping in a stable oscillator in detail, that is, stochastic resonance occurs. The maximum OAG can be achieved in the proper noise. The effect of asymmetric dichotomous noise on OAG versus frequency is similar to decreasing the damping coefficient.","PeriodicalId":218351,"journal":{"name":"2007 International Conference on Communications, Circuits and Systems","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121163768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2007-07-11DOI: 10.1109/ICCCAS.2007.4348208
Bo Liu, Zishu He, Qian He
A modified genetic algorithm (GA) is proposed to numerically design orthogonal discrete frequency-coding waveforms (DFCWs) which have good aperiodic autocorrelation and cross-correlation properties for orthogonal multiple input multiple output (MIMO) radar. Some of the designed results are presented, and their correlation properties are better than other known in the literature. The effect of Doppler frequency shift on the performance of these signals and ambiguity function are investigated. The simulation results and comparisons show that the proposed algorithm is more effective for the design of DFCWs with superior aperiodic correlation.
{"title":"Optimization of Orthogonal Discrete Frequency-Coding Waveform Based on Modified Genetic Algorithm for MIMO Radar","authors":"Bo Liu, Zishu He, Qian He","doi":"10.1109/ICCCAS.2007.4348208","DOIUrl":"https://doi.org/10.1109/ICCCAS.2007.4348208","url":null,"abstract":"A modified genetic algorithm (GA) is proposed to numerically design orthogonal discrete frequency-coding waveforms (DFCWs) which have good aperiodic autocorrelation and cross-correlation properties for orthogonal multiple input multiple output (MIMO) radar. Some of the designed results are presented, and their correlation properties are better than other known in the literature. The effect of Doppler frequency shift on the performance of these signals and ambiguity function are investigated. The simulation results and comparisons show that the proposed algorithm is more effective for the design of DFCWs with superior aperiodic correlation.","PeriodicalId":218351,"journal":{"name":"2007 International Conference on Communications, Circuits and Systems","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121199299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2007-07-11DOI: 10.1109/ICCCAS.2007.6247585
Yingxin Yu, Lin Wang, Qinfang Wei
Woven convolutional codes is a novel class error-correcting codes with high compatibility. But the coding efficiency of WCCs is lower and decoding delay is higher. The hardware realization is difficult for its encoding structure characteristic. These flaws restrict the applications of WCCs. In this paper, the puncturing technology is employed to enhance the coding efficiency and promote the application of WCCs. The puncturing technology is used to punctured outer warp and inner warp at first respectively. Over AWGN channel simulations show that the performance of punctured WCCs with outer warp is better than the non-punctured WCCs with outer warp with same rate and same number of outer encoders, and the complexity of encoding and decoding for WCCs based on puncturing is reduced greatly and the coding efficiency is improved greatly.
{"title":"Design and simulation of punctured woven convolutional codes","authors":"Yingxin Yu, Lin Wang, Qinfang Wei","doi":"10.1109/ICCCAS.2007.6247585","DOIUrl":"https://doi.org/10.1109/ICCCAS.2007.6247585","url":null,"abstract":"Woven convolutional codes is a novel class error-correcting codes with high compatibility. But the coding efficiency of WCCs is lower and decoding delay is higher. The hardware realization is difficult for its encoding structure characteristic. These flaws restrict the applications of WCCs. In this paper, the puncturing technology is employed to enhance the coding efficiency and promote the application of WCCs. The puncturing technology is used to punctured outer warp and inner warp at first respectively. Over AWGN channel simulations show that the performance of punctured WCCs with outer warp is better than the non-punctured WCCs with outer warp with same rate and same number of outer encoders, and the complexity of encoding and decoding for WCCs based on puncturing is reduced greatly and the coding efficiency is improved greatly.","PeriodicalId":218351,"journal":{"name":"2007 International Conference on Communications, Circuits and Systems","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121298629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2007-07-11DOI: 10.1109/ICCCAS.2007.6250070
Song Yunzhao, Wan Qun, Liu Gang
Common parameters for signal description can hardly meet practical requirement of radar signal sorting and recognition. Aiming at the problem of signal sorting system, DCT (discrete cosine transform) features and BT (product of bandwidth and time width) feature are introduced to form a new description vector. DCT features not only can reflect modulation mode but also are not sensitive to noise. BT feature can reflect some parameters of modulation. Both of DCT features and BT feature are easy to get. At last, results of weighted dynamic cluster show that DCT features and BT feature are effective for sorting.
{"title":"Partner choice based on beam search in wireless cooperative networks","authors":"Song Yunzhao, Wan Qun, Liu Gang","doi":"10.1109/ICCCAS.2007.6250070","DOIUrl":"https://doi.org/10.1109/ICCCAS.2007.6250070","url":null,"abstract":"Common parameters for signal description can hardly meet practical requirement of radar signal sorting and recognition. Aiming at the problem of signal sorting system, DCT (discrete cosine transform) features and BT (product of bandwidth and time width) feature are introduced to form a new description vector. DCT features not only can reflect modulation mode but also are not sensitive to noise. BT feature can reflect some parameters of modulation. Both of DCT features and BT feature are easy to get. At last, results of weighted dynamic cluster show that DCT features and BT feature are effective for sorting.","PeriodicalId":218351,"journal":{"name":"2007 International Conference on Communications, Circuits and Systems","volume":"44 14","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113974040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2007-07-11DOI: 10.1109/ICCCAS.2007.6250067
Dakui Wu, Minghua Zhao, Yong Fan, Yonghong Zhang
A new kind of planar antenna for wireless communication system is presented in this paper; the antenna is characterized with ominidirectional horizontal plane radiation pattern, compact structure and low profile. It can be used in UMTS or used as small indoor base station antenna. The simple structure of this antenna is based on the conventional small loop antenna. Four printed dipole antennas each with a microstrip via-hole balun feeding structure and two triangular mental plates are combined and fabricated on a substrate. The feeding line of the antenna is etched on the other side of it. Both simulated and measured results exhibit good performance of low un-roundness of horizontal plane omnidirectional radiation pattern.
{"title":"A 5.8-GHz omnidirectional horizontal radiation pattern antenna for wireless communication system","authors":"Dakui Wu, Minghua Zhao, Yong Fan, Yonghong Zhang","doi":"10.1109/ICCCAS.2007.6250067","DOIUrl":"https://doi.org/10.1109/ICCCAS.2007.6250067","url":null,"abstract":"A new kind of planar antenna for wireless communication system is presented in this paper; the antenna is characterized with ominidirectional horizontal plane radiation pattern, compact structure and low profile. It can be used in UMTS or used as small indoor base station antenna. The simple structure of this antenna is based on the conventional small loop antenna. Four printed dipole antennas each with a microstrip via-hole balun feeding structure and two triangular mental plates are combined and fabricated on a substrate. The feeding line of the antenna is etched on the other side of it. Both simulated and measured results exhibit good performance of low un-roundness of horizontal plane omnidirectional radiation pattern.","PeriodicalId":218351,"journal":{"name":"2007 International Conference on Communications, Circuits and Systems","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114744212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2007-07-11DOI: 10.1109/ICCCAS.2007.6250071
Wang Wei, Huang Jiyan, Wan Qun
The performance of mobile location systems is often limited by large errors primarily caused by non-line-of-sight (NLOS) propagation conditions. Nonparametric kernel-based estimators for location of mobile terminals using measurements of propagation delays have been proposed to mitigate the NLOS error. This paper proposes a novel estimation algorithm based on non-parametric density approximation of the measurements using a survey of time difference measurements. This method estimates the joint density function based on the Least Square Support Vector Machine (LS-SVM) solving linear operator equations. Utilizing kriging we interpolate the measurements to specific points that we are interested in to get more survey data. Simulation results indicate that the proposed algorithm provides better location accuracy even in severe NLOS conditions.
{"title":"A closed-loop STTD scheme using limited feedback unitary precoding for MIMO-OFDM-OSTBC system","authors":"Wang Wei, Huang Jiyan, Wan Qun","doi":"10.1109/ICCCAS.2007.6250071","DOIUrl":"https://doi.org/10.1109/ICCCAS.2007.6250071","url":null,"abstract":"The performance of mobile location systems is often limited by large errors primarily caused by non-line-of-sight (NLOS) propagation conditions. Nonparametric kernel-based estimators for location of mobile terminals using measurements of propagation delays have been proposed to mitigate the NLOS error. This paper proposes a novel estimation algorithm based on non-parametric density approximation of the measurements using a survey of time difference measurements. This method estimates the joint density function based on the Least Square Support Vector Machine (LS-SVM) solving linear operator equations. Utilizing kriging we interpolate the measurements to specific points that we are interested in to get more survey data. Simulation results indicate that the proposed algorithm provides better location accuracy even in severe NLOS conditions.","PeriodicalId":218351,"journal":{"name":"2007 International Conference on Communications, Circuits and Systems","volume":"534 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124266403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2007-07-11DOI: 10.1109/ICCCAS.2007.6251617
Ying Zhang, Wenyong Wang, Yu Xiang, D. Liao
The clustering Algorithm is a kind of key technique used to reduce energy consumption. It can increase the scalability and lifetime of the networks. Energy-efficient clustering algorithm should be designed for the characteristic of heterogeneous wireless sensor networks. We propose and evaluate a new cross-layer energy efficient clustering (CLEEC) algorithm for heterogeneous wireless sensor networks with renewable energy source. In CLEEC, the cluster heads are elected by probabilities based on cross-layer optimal estimation, considering energy replenishment. The cross-layer optimal estimation uses cross-layer information, such as energy and replenishment rate, to theoretically compute the election probabilities. Finally, the simulation results demonstrate that our clustering approach outperforms current important clustering algorithms in the efficiency of prolonging the network lifetime.
{"title":"Cross-layer energy efficient clustering for heterogeneous wireless sensor networks with renewable energy sources","authors":"Ying Zhang, Wenyong Wang, Yu Xiang, D. Liao","doi":"10.1109/ICCCAS.2007.6251617","DOIUrl":"https://doi.org/10.1109/ICCCAS.2007.6251617","url":null,"abstract":"The clustering Algorithm is a kind of key technique used to reduce energy consumption. It can increase the scalability and lifetime of the networks. Energy-efficient clustering algorithm should be designed for the characteristic of heterogeneous wireless sensor networks. We propose and evaluate a new cross-layer energy efficient clustering (CLEEC) algorithm for heterogeneous wireless sensor networks with renewable energy source. In CLEEC, the cluster heads are elected by probabilities based on cross-layer optimal estimation, considering energy replenishment. The cross-layer optimal estimation uses cross-layer information, such as energy and replenishment rate, to theoretically compute the election probabilities. Finally, the simulation results demonstrate that our clustering approach outperforms current important clustering algorithms in the efficiency of prolonging the network lifetime.","PeriodicalId":218351,"journal":{"name":"2007 International Conference on Communications, Circuits and Systems","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128183246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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