A new signal processing application method of an improved CLIQUE algorithm based on Park's vector modulus spectrum for bearing fault detection is presented. The major theoretical principles of the algorithm based on spectral analysis are described. The presented approach is suited for condition monitoring of machine system under varying operating and loading conditions. The performance of this technique is investigated through study of realistic current signals. Experimental results show that the proposed method has better performance and validity in realizing bearing faults of marine motors.
{"title":"Signal processing aapplication based on an improved CLIQUE algorithm for marine motors' bearing faults detection","authors":"Xuezhengyu Fanyinhai, Jiangmingbao Shenlixin, Jiangmingbao, Shenlixin","doi":"10.1109/WCSP.2009.5371710","DOIUrl":"https://doi.org/10.1109/WCSP.2009.5371710","url":null,"abstract":"A new signal processing application method of an improved CLIQUE algorithm based on Park's vector modulus spectrum for bearing fault detection is presented. The major theoretical principles of the algorithm based on spectral analysis are described. The presented approach is suited for condition monitoring of machine system under varying operating and loading conditions. The performance of this technique is investigated through study of realistic current signals. Experimental results show that the proposed method has better performance and validity in realizing bearing faults of marine motors.","PeriodicalId":244652,"journal":{"name":"2009 International Conference on Wireless Communications & Signal Processing","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126307494","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 : 2009-12-31DOI: 10.1109/WCSP.2009.5371532
Qipeng Gong, P. Kabal
In Voice-over-IP, jitter buffers are introduced at both sides of the sender and the receiver to compensate for delay jitters. A longer buffer reduces the possibility of packet loss and packet disorder at the expense of increasing conversational delays. In this paper, we propose a novel criterion for the calling quality of conversational VoIP, including the effect of delay on interactivity of a conversation. Using this criterion, we propose a quality-based playout scheduling algorithm with improved voice quality and reduced conversational delays. The Simulation results show that the proposed algorithm can achieve the best calling quality compared with other algorithms.
{"title":"A new optimum jitter protection for conversational VoIP","authors":"Qipeng Gong, P. Kabal","doi":"10.1109/WCSP.2009.5371532","DOIUrl":"https://doi.org/10.1109/WCSP.2009.5371532","url":null,"abstract":"In Voice-over-IP, jitter buffers are introduced at both sides of the sender and the receiver to compensate for delay jitters. A longer buffer reduces the possibility of packet loss and packet disorder at the expense of increasing conversational delays. In this paper, we propose a novel criterion for the calling quality of conversational VoIP, including the effect of delay on interactivity of a conversation. Using this criterion, we propose a quality-based playout scheduling algorithm with improved voice quality and reduced conversational delays. The Simulation results show that the proposed algorithm can achieve the best calling quality compared with other algorithms.","PeriodicalId":244652,"journal":{"name":"2009 International Conference on Wireless Communications & Signal Processing","volume":"138 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114108400","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 : 2009-12-31DOI: 10.1109/WCSP.2009.5371583
Yang Ling, Xiao-fan Zhang, Yu-shan Liu
The TCP flow fairness problem in 802.11 based multihop ad hoc networks was studied in this paper. Firstly, a probability model was established to describe the TCP flow fairness, and its rationality was verified by simulation; Then, a new MAC layer scheme with low overhead cost was proposed, in which the backoff window at MAC layer was controlled by detecting the basic factors that lead to the TCP flow unfairness, and so the TCP flow fairness was improved. The proposed algorithm was simply and easy to implement, simulation results show that it can eliminate the TCP flow monopoly phenomenon, improve the TCP flow fairness validly and without significantly impairing aggregate throughput in multihop ad hoc networks.
{"title":"Analyzing and improving the TCP flow fairness in 802.11 based ad hoc networks","authors":"Yang Ling, Xiao-fan Zhang, Yu-shan Liu","doi":"10.1109/WCSP.2009.5371583","DOIUrl":"https://doi.org/10.1109/WCSP.2009.5371583","url":null,"abstract":"The TCP flow fairness problem in 802.11 based multihop ad hoc networks was studied in this paper. Firstly, a probability model was established to describe the TCP flow fairness, and its rationality was verified by simulation; Then, a new MAC layer scheme with low overhead cost was proposed, in which the backoff window at MAC layer was controlled by detecting the basic factors that lead to the TCP flow unfairness, and so the TCP flow fairness was improved. The proposed algorithm was simply and easy to implement, simulation results show that it can eliminate the TCP flow monopoly phenomenon, improve the TCP flow fairness validly and without significantly impairing aggregate throughput in multihop ad hoc networks.","PeriodicalId":244652,"journal":{"name":"2009 International Conference on Wireless Communications & Signal Processing","volume":"147 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121252835","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 : 2009-12-31DOI: 10.1109/WCSP.2009.5371659
Qiuna Niu
In mobile ad hoc networks, routing security has become an important issue. Due to limited bandwidth and batteries energy of ad hoc networks, routing protocols of ad hoc must be secure, effective and less redundancy. This makes it possible for analyzing the security performance of routing protocols via formal analysis. In this paper, we describe the formalization of routing protocols by using BAN logic, and present the formal method in detail. Further, taking example of Authenticated Routing for Ad hoc Networks (ARAN), we analyze the security of routing protocol precisely using the formal method, which proves the method is valid.
{"title":"Formal analysis of secure routing protocol for ad hoc networks","authors":"Qiuna Niu","doi":"10.1109/WCSP.2009.5371659","DOIUrl":"https://doi.org/10.1109/WCSP.2009.5371659","url":null,"abstract":"In mobile ad hoc networks, routing security has become an important issue. Due to limited bandwidth and batteries energy of ad hoc networks, routing protocols of ad hoc must be secure, effective and less redundancy. This makes it possible for analyzing the security performance of routing protocols via formal analysis. In this paper, we describe the formalization of routing protocols by using BAN logic, and present the formal method in detail. Further, taking example of Authenticated Routing for Ad hoc Networks (ARAN), we analyze the security of routing protocol precisely using the formal method, which proves the method is valid.","PeriodicalId":244652,"journal":{"name":"2009 International Conference on Wireless Communications & Signal Processing","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121238192","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 : 2009-12-31DOI: 10.1109/WCSP.2009.5371418
Yushan Yang, Ming Jiang, Xiaofu Wu
In this paper, a practical approach to the iterative soft-decision decoding algorithms based on adaptive belief propagation (ABP) is investigated for Reed-Solomon (RS) codes. The novelty is cascading a simplified Chase type decoder to the ABP scheme in each iteration, which can be viewed as an efficient termination criterion deployed in the ABP algorithm. Simulation results show that the proposed algorithm improves the FER performance and converges with fewer iterations averagely, which declares a significant complexity reduction.
{"title":"An investigation in iterative decoding of Reed-Solomon codes based on adaptive belief propagation","authors":"Yushan Yang, Ming Jiang, Xiaofu Wu","doi":"10.1109/WCSP.2009.5371418","DOIUrl":"https://doi.org/10.1109/WCSP.2009.5371418","url":null,"abstract":"In this paper, a practical approach to the iterative soft-decision decoding algorithms based on adaptive belief propagation (ABP) is investigated for Reed-Solomon (RS) codes. The novelty is cascading a simplified Chase type decoder to the ABP scheme in each iteration, which can be viewed as an efficient termination criterion deployed in the ABP algorithm. Simulation results show that the proposed algorithm improves the FER performance and converges with fewer iterations averagely, which declares a significant complexity reduction.","PeriodicalId":244652,"journal":{"name":"2009 International Conference on Wireless Communications & Signal Processing","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121823959","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 : 2009-12-31DOI: 10.1109/WCSP.2009.5371751
Yuan Liu, G. He
Multi-scale is a very important feature for people to recognize the world, which is existing in the nature everywhere. The multi-scale analysis can integrate rich information of different levels, with the perfect unit of the easy partition of coarse image and high accuracy of fine image. In this article, an algorithm is proposed which is used to refine the boundary in fine image based on the multi-scale feature. It is proved to be effective through the experiments.
{"title":"An algorithm of boundary refinement based on the multi-scale feature for high resolution remote sensing images","authors":"Yuan Liu, G. He","doi":"10.1109/WCSP.2009.5371751","DOIUrl":"https://doi.org/10.1109/WCSP.2009.5371751","url":null,"abstract":"Multi-scale is a very important feature for people to recognize the world, which is existing in the nature everywhere. The multi-scale analysis can integrate rich information of different levels, with the perfect unit of the easy partition of coarse image and high accuracy of fine image. In this article, an algorithm is proposed which is used to refine the boundary in fine image based on the multi-scale feature. It is proved to be effective through the experiments.","PeriodicalId":244652,"journal":{"name":"2009 International Conference on Wireless Communications & Signal Processing","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123850563","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 : 2009-12-31DOI: 10.1109/WCSP.2009.5371477
Huihua Cheng, Wei Zhang, Zhichao Shao, Weidong Li, Xiufen Liu
A fault diagnose expert system base on VXI is designed to proceed automatically a certain type high-tech information electronic equipment fault detection and improve its efficiency and accuracy of diagnosis. This paper mainly introduces the research on algorithm and realization of the fault diagnose expert system of the Charger I of such equipment, and example proving on the hardware platform is described as well. By use of such method, it's quicker and more convenient to locate fault on the circuit boards on this equipment. It's proved that this expert system can solve the problems of high cost and long intervals of maintenance and keep the equipment in a stable status.
{"title":"Research on fault diagnosis expert system based on VXI bus for charger I circuit board","authors":"Huihua Cheng, Wei Zhang, Zhichao Shao, Weidong Li, Xiufen Liu","doi":"10.1109/WCSP.2009.5371477","DOIUrl":"https://doi.org/10.1109/WCSP.2009.5371477","url":null,"abstract":"A fault diagnose expert system base on VXI is designed to proceed automatically a certain type high-tech information electronic equipment fault detection and improve its efficiency and accuracy of diagnosis. This paper mainly introduces the research on algorithm and realization of the fault diagnose expert system of the Charger I of such equipment, and example proving on the hardware platform is described as well. By use of such method, it's quicker and more convenient to locate fault on the circuit boards on this equipment. It's proved that this expert system can solve the problems of high cost and long intervals of maintenance and keep the equipment in a stable status.","PeriodicalId":244652,"journal":{"name":"2009 International Conference on Wireless Communications & Signal Processing","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124976994","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 : 2009-12-31DOI: 10.1109/WCSP.2009.5371478
Xiaojian Liu, Xiaojun Sun, Ming Jiang, Chunming Zhao
In this paper, we present a practical RS-CC concatenated coding scheme for half-duplex decode-and-forward (DF) relaying in the WiMAX system. In our proposed scheme, the relay firstly decodes the code from the source, then it sends the punctured information of the CC to the destination. We also proposed a soft decoding scheme for the concatenated codes. The simulation results of several models of the concatenated codes found in IEEE 802.16 technical specification are presented.
{"title":"The performance of RS-CC concatenated codes for the relay channel in WiMAX system","authors":"Xiaojian Liu, Xiaojun Sun, Ming Jiang, Chunming Zhao","doi":"10.1109/WCSP.2009.5371478","DOIUrl":"https://doi.org/10.1109/WCSP.2009.5371478","url":null,"abstract":"In this paper, we present a practical RS-CC concatenated coding scheme for half-duplex decode-and-forward (DF) relaying in the WiMAX system. In our proposed scheme, the relay firstly decodes the code from the source, then it sends the punctured information of the CC to the destination. We also proposed a soft decoding scheme for the concatenated codes. The simulation results of several models of the concatenated codes found in IEEE 802.16 technical specification are presented.","PeriodicalId":244652,"journal":{"name":"2009 International Conference on Wireless Communications & Signal Processing","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121354864","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 : 2009-12-31DOI: 10.1109/WCSP.2009.5371419
P. Tsai, Po-Hsien Hsieh
In this paper, we propose an ordered selection technique to improve the performance of the decision-directed RLS adaptive channel tracking algorithm in 2×2 spatial-multiplexing MIMO-OFDM systems under high mobility. The proposed technique uses the decision of high reliability order during MIMO signal detection and then selectively activates the RLS adaptation only when less interference and error will be generated if a wrong decision is still made. Simulation results show that the channel tracking accuracy of the proposed approach outperforms the 2D-RLS algorithm and the conventional linear interpolation algorithm. Moreover, we also show that both ordering and selection are effective and necessary to greatly suppress the error propagation and coefficient misadjustment. With the proposed technique, the system performance has obvious SNR improvements.
{"title":"An RLS channel tracking algorithm with an ordered selection technique for MIMO-OFDM systems in time-selective fading channels","authors":"P. Tsai, Po-Hsien Hsieh","doi":"10.1109/WCSP.2009.5371419","DOIUrl":"https://doi.org/10.1109/WCSP.2009.5371419","url":null,"abstract":"In this paper, we propose an ordered selection technique to improve the performance of the decision-directed RLS adaptive channel tracking algorithm in 2×2 spatial-multiplexing MIMO-OFDM systems under high mobility. The proposed technique uses the decision of high reliability order during MIMO signal detection and then selectively activates the RLS adaptation only when less interference and error will be generated if a wrong decision is still made. Simulation results show that the channel tracking accuracy of the proposed approach outperforms the 2D-RLS algorithm and the conventional linear interpolation algorithm. Moreover, we also show that both ordering and selection are effective and necessary to greatly suppress the error propagation and coefficient misadjustment. With the proposed technique, the system performance has obvious SNR improvements.","PeriodicalId":244652,"journal":{"name":"2009 International Conference on Wireless Communications & Signal Processing","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125146235","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 : 2009-12-31DOI: 10.1109/WCSP.2009.5371472
Zhenyu Zhang, F. Zeng, Guixin Xuan
Based on the interleaving technique, a general design of orthogonal sequences with alternate periodic correlation values equal to zero is proposed. The proposed sequence set can be divided into two groups. In addition to traditional orthogonal properties, the periodic auto-correlation functions (ACFs) and intra-group cross-correlation functions (CCFs) of the designed sequences take zero at any odd shift while the inter-group CCFs take zero at any even shift. As a special case of the sequences with zero correlation zone (ZCZ), the designed sequences have the fixed ZCZ widths of 1 and 2, and can achieve the theoretical bound of set size for sequence length and ZCZ width.
{"title":"A general design of orthogonal sequences with alternate periodic correlation values equal to zero","authors":"Zhenyu Zhang, F. Zeng, Guixin Xuan","doi":"10.1109/WCSP.2009.5371472","DOIUrl":"https://doi.org/10.1109/WCSP.2009.5371472","url":null,"abstract":"Based on the interleaving technique, a general design of orthogonal sequences with alternate periodic correlation values equal to zero is proposed. The proposed sequence set can be divided into two groups. In addition to traditional orthogonal properties, the periodic auto-correlation functions (ACFs) and intra-group cross-correlation functions (CCFs) of the designed sequences take zero at any odd shift while the inter-group CCFs take zero at any even shift. As a special case of the sequences with zero correlation zone (ZCZ), the designed sequences have the fixed ZCZ widths of 1 and 2, and can achieve the theoretical bound of set size for sequence length and ZCZ width.","PeriodicalId":244652,"journal":{"name":"2009 International Conference on Wireless Communications & Signal Processing","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125095444","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：