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2007 International Symposium on Intelligent Signal Processing and Communication Systems最新文献

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A vision-based method to estimate passenger flow in bus 基于视觉的公交客流估计方法
2007 International Symposium on Intelligent Signal Processing and Communication Systems Pub Date : 2007-11-01 DOI: 10.1109/ISPACS.2007.4445972
Haibin Yu, Zhiwei He, Jilin Liu
{"title":"A vision-based method to estimate passenger flow in bus","authors":"Haibin Yu, Zhiwei He, Jilin Liu","doi":"10.1109/ISPACS.2007.4445972","DOIUrl":"https://doi.org/10.1109/ISPACS.2007.4445972","url":null,"abstract":"In this paper, we describe a procedure using image processing for real-time estimation of passenger crowd flow in a complicated background in a bus. The contour feature of the head is exploited to locate every passenger's position. In order to obtain the contour feature accurately, the modification of the Hough Transform and the fuzzy measure are applied. The procedure has been implemented in a DSP-based embedded system for field tests and the results show that the procedure mentioned here is effective.","PeriodicalId":220276,"journal":{"name":"2007 International Symposium on Intelligent Signal Processing and Communication Systems","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114569623","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}
引用次数: 16
Low-complexity sparse channel estimation for OFDM system based on gaic model selection 基于遗传模型选择的OFDM系统低复杂度稀疏信道估计
2007 International Symposium on Intelligent Signal Processing and Communication Systems Pub Date : 2007-11-01 DOI: 10.1109/ISPACS.2007.4446003
Qingchuan Zhang, F. Shu, Jintao Sun
{"title":"Low-complexity sparse channel estimation for OFDM system based on gaic model selection","authors":"Qingchuan Zhang, F. Shu, Jintao Sun","doi":"10.1109/ISPACS.2007.4446003","DOIUrl":"https://doi.org/10.1109/ISPACS.2007.4446003","url":null,"abstract":"We propose a low-complexity sparse channel estimation method for OFDM system. The received signal subspace of transmission through a sparse channel is spanned by a few vectors corresponding to the path delays. The matching pursuit (MP) algorithm is considered and we use the cyclic orthogonal training sequence to reduce the complexity due to the iterative searching procedure. Then, the generalized Akaike information criterion (GAIC) is used to make the decision among the candidate sets of basis vectors provided by MP. From computer simulation, the proposed method shows a much better performance than the traditional ML method by exploiting the sparse characteristic of channel.","PeriodicalId":220276,"journal":{"name":"2007 International Symposium on Intelligent Signal Processing and Communication Systems","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116147020","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}
引用次数: 0
A parameter estimation algorithm for high-speed frequency-hopping signals based on RSPWVD 基于RSPWVD的高速跳频信号参数估计算法
2007 International Symposium on Intelligent Signal Processing and Communication Systems Pub Date : 2007-11-01 DOI: 10.1109/ISPACS.2007.4445906
Yingke Lei, Zifa Zhong, Yanhua Wu
{"title":"A parameter estimation algorithm for high-speed frequency-hopping signals based on RSPWVD","authors":"Yingke Lei, Zifa Zhong, Yanhua Wu","doi":"10.1109/ISPACS.2007.4445906","DOIUrl":"https://doi.org/10.1109/ISPACS.2007.4445906","url":null,"abstract":"The key to jam frequency-hopping communication is to estimate its parameters efficiently and precisely. An algorithm for estimating the parameters of frequency hopping (FH) signals based on reassigned smoothed pseudo WVD (RSPWVD) is proposed. With the good time- frequency concentration and restraining cross-term ability of RSPWVD, this algorithm can efficiently estimate the parameters of FH signals such as hop duration, hop timing and hop frequencies. Simulation results demonstrate that the estimation algorithm is accurate and efficient.","PeriodicalId":220276,"journal":{"name":"2007 International Symposium on Intelligent Signal Processing and Communication Systems","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122015109","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}
引用次数: 4
Improvement in camera calibration based on RAC 基于RAC的摄像机标定改进
2007 International Symposium on Intelligent Signal Processing and Communication Systems Pub Date : 2007-11-01 DOI: 10.1109/ISPACS.2007.4445851
Quan Liu, Hang Su
{"title":"Improvement in camera calibration based on RAC","authors":"Quan Liu, Hang Su","doi":"10.1109/ISPACS.2007.4445851","DOIUrl":"https://doi.org/10.1109/ISPACS.2007.4445851","url":null,"abstract":"The two-stage technique proposed by Tsai has advantage in terms of accuracy, speed, and versatility over existing state of the art. But it does not calibrate the image center so that the errors in the translation and rotation are induces by choosing a wrong image center. The proposed technique only requires the camera to observe a planar pattern shown at a few (at least two) different orientations and computes the image center using Z.Zhang method. The remaining parameters are calibrated with the accurate center estimate. Finally, we can refine the above solution through maximum likelihood criterion. Real data has been used to test the proposed technique and very good results have been obtained. Compared with Tsai's method, the proposed method is more accurate and simple.","PeriodicalId":220276,"journal":{"name":"2007 International Symposium on Intelligent Signal Processing and Communication Systems","volume":"128 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128189237","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}
引用次数: 0
Modeling of varying geometrical scenarios of bistatic radar 双基地雷达不同几何情景的建模
2007 International Symposium on Intelligent Signal Processing and Communication Systems Pub Date : 2007-11-01 DOI: 10.1109/ISPACS.2007.4445857
Han Li-juan, Che Zhu-ming, Duan Rui, Jiang Chao-shu
{"title":"Modeling of varying geometrical scenarios of bistatic radar","authors":"Han Li-juan, Che Zhu-ming, Duan Rui, Jiang Chao-shu","doi":"10.1109/ISPACS.2007.4445857","DOIUrl":"https://doi.org/10.1109/ISPACS.2007.4445857","url":null,"abstract":"In this paper, a bistatic clutter geometrical model is proposed. The model can accurately describe the geometrical relationship between the bistatic radars and the clutter scatterers, and it can be applied in any bistatic geometrical scenarios. On the basis of analyzing the geometrical relationship between the bistatic radars and the clutter scatterers in varying geometrical scenarios, the paper formulates mathematical expressions to describe the geometrical relationship. The method for deducing the expressions is introduced in detail. Finally, the Doppler-azimuth trajectories are provided with to examine the model via four bistatic geometrical scenarios and compared with that of multichannel airborne radar measurements (MCARM). The results prove that the model is accurate.","PeriodicalId":220276,"journal":{"name":"2007 International Symposium on Intelligent Signal Processing and Communication Systems","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125989879","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}
引用次数: 2
An adaptive edge enhancing image denoising model based on fuzzy theory 基于模糊理论的自适应边缘增强图像去噪模型
2007 International Symposium on Intelligent Signal Processing and Communication Systems Pub Date : 2007-11-01 DOI: 10.1109/ISPACS.2007.4445862
Jiying Wu, Q. Ruan
{"title":"An adaptive edge enhancing image denoising model based on fuzzy theory","authors":"Jiying Wu, Q. Ruan","doi":"10.1109/ISPACS.2007.4445862","DOIUrl":"https://doi.org/10.1109/ISPACS.2007.4445862","url":null,"abstract":"PDE (Partial differential equation) is a widely used image denoising method. The anisotropic diffusion property of PDE is analyzed in this paper. For the different effects of forward and backward diffusion, some kinds of PDE smooth image well while some enhance edges. In this paper an adaptive image denoising model is proposed. The novel model diffuses differently based on gradient magnitude of image. The image parts which have large gradient magnitude are deemed as edges and textures, the adaptive model will enhance them. The selection of diffusion types changes gradually according to gradient magnitudes in different parts of image based on fuzzy theory. Both theoretical analysis and experiments have been used to verify that the novel adaptive image denoising model enhances edges while denoising.","PeriodicalId":220276,"journal":{"name":"2007 International Symposium on Intelligent Signal Processing and Communication Systems","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126749428","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}
引用次数: 7
A novel MAC protocol for IEEE 802.15.3C 一种新的IEEE 802.15.3C MAC协议
2007 International Symposium on Intelligent Signal Processing and Communication Systems Pub Date : 2007-11-01 DOI: 10.1109/ISPACS.2007.4445984
Kejiang Gan, P. Xu, Yingxin Zhao, G. Bi
{"title":"A novel MAC protocol for IEEE 802.15.3C","authors":"Kejiang Gan, P. Xu, Yingxin Zhao, G. Bi","doi":"10.1109/ISPACS.2007.4445984","DOIUrl":"https://doi.org/10.1109/ISPACS.2007.4445984","url":null,"abstract":"This paper analyzes and compares performances of several improved medium access control (MAC) protocols and CSMA/CA protocol when the data rate is high (at least 1 Gbps), then proposes a novel MAC protocol, called pseudo-time division backoff scheme (PTDBS). The proposed scheme can be implemented in IEEE 802.15.3c easily and it can become an improved access control method in contention access period (CAP) for existing IEEE 802.15.3 MAC. PTDBS has been validated using OPNET network simulator. The results show that PTDBS offers higher throughput, lower delay and completion rate of close to one when the traffic load is heavy compared with the CSMA/CA protocol and other improved MAC protocols.","PeriodicalId":220276,"journal":{"name":"2007 International Symposium on Intelligent Signal Processing and Communication Systems","volume":"117 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124334088","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}
引用次数: 2
Fairness investigation in Ad hoc networks Ad hoc网络中的公平性调查
2007 International Symposium on Intelligent Signal Processing and Communication Systems Pub Date : 2007-11-01 DOI: 10.1109/ISPACS.2007.4445889
A. Giovanardi, G. Mazzini
{"title":"Fairness investigation in Ad hoc networks","authors":"A. Giovanardi, G. Mazzini","doi":"10.1109/ISPACS.2007.4445889","DOIUrl":"https://doi.org/10.1109/ISPACS.2007.4445889","url":null,"abstract":"The paper proposes a mechanism to introduce fairness in ad hoc networks. This mechanism should avoid to stress the same hosts in the packet relaying. In fact, nodes used as router are often the same, especially if no mobility is present. This is because, in classic routing protocols, the cost functions do not vary (are usually equal to 1), and then, if no particular channel fluctuations or topology variations are present, routes selected to reach a given target involve the same central nodes. The proposed fairness scheme acts on the cost function of a given link, by multiplying it by an increasing weight every time the link is used; so, its further utilization is discouraged.","PeriodicalId":220276,"journal":{"name":"2007 International Symposium on Intelligent Signal Processing and Communication Systems","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123751995","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}
引用次数: 1
An improved square-based palmprint segmentation method 一种改进的基于正方形的掌纹分割方法
2007 International Symposium on Intelligent Signal Processing and Communication Systems Pub Date : 2007-11-01 DOI: 10.1109/ISPACS.2007.4445887
Yanxia Wang, Q. Ruan, Xin Pan
{"title":"An improved square-based palmprint segmentation method","authors":"Yanxia Wang, Q. Ruan, Xin Pan","doi":"10.1109/ISPACS.2007.4445887","DOIUrl":"https://doi.org/10.1109/ISPACS.2007.4445887","url":null,"abstract":"Palmprint segmentation is an important task for palmprint recognition. By the segmentation operation, an expected area of each palmprint can be extracted for the future feature extraction and matching. In the paper, an improved square-based segmentation method for palmprint alignment and extraction is presented. The approach successfully extracts three key points in a local area. The outside boundary of palm is approximated as a reference line to align palmprint images and the reference line is decided by these key points. In the aligned palmprint image, a coordinate system is set up and a central part of palmprint image is extracted. In addition, the method can automatically adjust the size of the extracted area according to the width of the palm. The experimental results demonstrate the effectiveness and accuracy of segmentation of the proposed approach.","PeriodicalId":220276,"journal":{"name":"2007 International Symposium on Intelligent Signal Processing and Communication Systems","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131475796","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}
引用次数: 11
Dwell scheduling of multifunction phased array radars based on genetic algorithm 基于遗传算法的多功能相控阵雷达驻留调度
2007 International Symposium on Intelligent Signal Processing and Communication Systems Pub Date : 2007-11-01 DOI: 10.1109/ISPACS.2007.4446020
T. Cheng, Zishu He, T. Tang
{"title":"Dwell scheduling of multifunction phased array radars based on genetic algorithm","authors":"T. Cheng, Zishu He, T. Tang","doi":"10.1109/ISPACS.2007.4446020","DOIUrl":"https://doi.org/10.1109/ISPACS.2007.4446020","url":null,"abstract":"A dwell scheduling model which takes the time and energy constraints into account is founded from the viewpoint of scheduling gain. Dwell scheduling strategy design is turned into a nonlinear programming procedure. A dwell scheduling algorithm is then given based on the genetic algorithm. Simulation results demonstrate that compared with the conventional adaptive scheduling method, the proposed algorithm not only increases the scheduling gain and the time utility of the system but also decreases the task drop rate.","PeriodicalId":220276,"journal":{"name":"2007 International Symposium on Intelligent Signal Processing and Communication Systems","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125560110","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}
引用次数: 3
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