Pub Date : 2010-11-01DOI: 10.1109/ISABEL.2010.5702881
M. Radványi, K. Karacs
In this paper we present an algorithm that help blind and visually impaired people to navigate through urban environments by detecting pedestrian crosswalks. In addition to detecting the presence of a crosswalk, its orientation and position respected to the camera is also determined to help the approach of intersections and traversing them.
{"title":"Navigation through crosswalks with the Bionic Eyeglass","authors":"M. Radványi, K. Karacs","doi":"10.1109/ISABEL.2010.5702881","DOIUrl":"https://doi.org/10.1109/ISABEL.2010.5702881","url":null,"abstract":"In this paper we present an algorithm that help blind and visually impaired people to navigate through urban environments by detecting pedestrian crosswalks. In addition to detecting the presence of a crosswalk, its orientation and position respected to the camera is also determined to help the approach of intersections and traversing them.","PeriodicalId":165367,"journal":{"name":"2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115203004","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 : 2010-11-01DOI: 10.1109/ISABEL.2010.5702768
Hanwen Cao, Souhir Daoud, A. Wilzeck, T. Kaiser
Multi-carrier techniques such as OFDM are widely adopted in the physical layer of nowadays radio communication and broadcasting systems. Therefore in cognitive radio, a robust spectrum sensing techniques for such signals is highly desired. Comparing with traditional Cyclic Prefix (CP) based method, newly reported Time-Domain Symbol Cross-correlation based spectrum sensing (TDSC) method [1][2] shows both advantages in sensing accuracy and robustness against shortness of and channel time spread pollution to CP. This sensing method is able to sense all multi-carrier signals with repeated pilot patterns. In this paper, further validations of TDSC-NP (Neyman-Pearson) and TDSC-MRC (Maximal Ratio Combining) methods are presented with practical issues taken into account, e.g. noise uncertainty, oscillator imperfection and computational complexity. The feasibility of applying TDSC for sensing Filter Bank Multi-Carrier (FBMC) signal is validated via simulation. Both simulated signal and captured DVB-T signal with real-world multi-path channel fading are analyzed and the sensing performance of captured signal agrees with that of simulated signal very well.
在当今无线电通信和广播系统的物理层中，广泛采用了OFDM等多载波技术。因此，在认知无线电中，迫切需要一种针对此类信号的鲁棒频谱感知技术。与传统的基于循环前缀(CP)的方法相比，新报道的基于时域符号相互关联的频谱感知(TDSC)方法[1][2]在感知精度和抗CP短污染和信道时间扩散污染的鲁棒性方面都具有优势，该感知方法能够感知所有具有重复导频模式的多载波信号。在本文中，进一步验证了TDSC-NP (Neyman-Pearson)和TDSC-MRC (maximum Ratio combined)方法，并考虑了噪声不确定性、振荡器缺陷和计算复杂性等实际问题。通过仿真验证了TDSC应用于滤波组多载波(FBMC)信号检测的可行性。对仿真信号和捕获的真实多径信道衰落的DVB-T信号进行了分析，捕获信号的感知性能与模拟信号的感知性能吻合良好。
{"title":"Practical issues in spectrum sensing for multi-carrier system employing pilot tones","authors":"Hanwen Cao, Souhir Daoud, A. Wilzeck, T. Kaiser","doi":"10.1109/ISABEL.2010.5702768","DOIUrl":"https://doi.org/10.1109/ISABEL.2010.5702768","url":null,"abstract":"Multi-carrier techniques such as OFDM are widely adopted in the physical layer of nowadays radio communication and broadcasting systems. Therefore in cognitive radio, a robust spectrum sensing techniques for such signals is highly desired. Comparing with traditional Cyclic Prefix (CP) based method, newly reported Time-Domain Symbol Cross-correlation based spectrum sensing (TDSC) method [1][2] shows both advantages in sensing accuracy and robustness against shortness of and channel time spread pollution to CP. This sensing method is able to sense all multi-carrier signals with repeated pilot patterns. In this paper, further validations of TDSC-NP (Neyman-Pearson) and TDSC-MRC (Maximal Ratio Combining) methods are presented with practical issues taken into account, e.g. noise uncertainty, oscillator imperfection and computational complexity. The feasibility of applying TDSC for sensing Filter Bank Multi-Carrier (FBMC) signal is validated via simulation. Both simulated signal and captured DVB-T signal with real-world multi-path channel fading are analyzed and the sensing performance of captured signal agrees with that of simulated signal very well.","PeriodicalId":165367,"journal":{"name":"2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124362196","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 : 2010-11-01DOI: 10.1109/ISABEL.2010.5702784
Jingjing Shi, Jianqing Wang
This paper aims at the feasibility study of a wireless link for capsule endoscope by using of low-band ultra wideband (UWB) signals. The UWB technique has a potential to provide real-time image transmission from the inside to outside of the body, but it suffers from the large attenuation in the human tissue. We employ the finite difference time domain (FDTD) numerical technique together with an anatomical human body model to derive the channel characteristics such as the path loss and shadow fading. We also investigate the feasibility to use a space diversity technique to improve the communication performance. The results have shown a possibility to use the low-band UWB technique to realize a data rate as high as 80 Mbps for the capsule endoscope application.
{"title":"Channel characterization and diversity feasibility for in-body to on-body communication using low-band UWB signals","authors":"Jingjing Shi, Jianqing Wang","doi":"10.1109/ISABEL.2010.5702784","DOIUrl":"https://doi.org/10.1109/ISABEL.2010.5702784","url":null,"abstract":"This paper aims at the feasibility study of a wireless link for capsule endoscope by using of low-band ultra wideband (UWB) signals. The UWB technique has a potential to provide real-time image transmission from the inside to outside of the body, but it suffers from the large attenuation in the human tissue. We employ the finite difference time domain (FDTD) numerical technique together with an anatomical human body model to derive the channel characteristics such as the path loss and shadow fading. We also investigate the feasibility to use a space diversity technique to improve the communication performance. The results have shown a possibility to use the low-band UWB technique to realize a data rate as high as 80 Mbps for the capsule endoscope application.","PeriodicalId":165367,"journal":{"name":"2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122307624","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 : 2010-11-01DOI: 10.1109/ISABEL.2010.5702857
Jerald Yoo
This paper introduces two emerging wearable technologies: Planar-Fabric Circuit Board (P-FCB) and Silicon-on-Clothes (SoC). P-FCB enables fabric itself to become a circuit board and it maximizes wearer's comfort and safety. Discrete components and dry fabric electrodes made out of P-FCB is discussed and their electrical characteristics are shown. SoC directly integrates silicon chip onto P-FCB to form a system. With these technologies, an example patch sensor is also presented.
{"title":"Planar-Fabric Circuit Board and Silicon-on-Clothes for wearable healthcare applications","authors":"Jerald Yoo","doi":"10.1109/ISABEL.2010.5702857","DOIUrl":"https://doi.org/10.1109/ISABEL.2010.5702857","url":null,"abstract":"This paper introduces two emerging wearable technologies: Planar-Fabric Circuit Board (P-FCB) and Silicon-on-Clothes (SoC). P-FCB enables fabric itself to become a circuit board and it maximizes wearer's comfort and safety. Discrete components and dry fabric electrodes made out of P-FCB is discussed and their electrical characteristics are shown. SoC directly integrates silicon chip onto P-FCB to form a system. With these technologies, an example patch sensor is also presented.","PeriodicalId":165367,"journal":{"name":"2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128965408","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 : 2010-11-01DOI: 10.1504/IJAACS.2014.067241
O. Ognenoski, B. Jankuloska, V. Atanasovski, L. Gavrilovska
This paper investigates a simple opportunistic resource sharing scheme enhanced with a borrowing concept from a traffic viewpoint. Resources (such as spectrum, channels etc.) are shared between primary and secondary users through a centralized scheme deployed at a base station. The primary users have the preemptive channel access, whereas the secondary ones opportunistically use the available channels. The borrowing concept is introduced to increase the resource availability at the base station level. Evaluations are carried via service retainability, service completions and cumulative effect analysis as relevant secondary users's metrics. The results provide guidelines for designing effective borrowing schemes in terms of quantity of the borrowed resources and the borrowing time duration.
{"title":"Performance of resource sharing and borrowing in opportunistic access systems","authors":"O. Ognenoski, B. Jankuloska, V. Atanasovski, L. Gavrilovska","doi":"10.1504/IJAACS.2014.067241","DOIUrl":"https://doi.org/10.1504/IJAACS.2014.067241","url":null,"abstract":"This paper investigates a simple opportunistic resource sharing scheme enhanced with a borrowing concept from a traffic viewpoint. Resources (such as spectrum, channels etc.) are shared between primary and secondary users through a centralized scheme deployed at a base station. The primary users have the preemptive channel access, whereas the secondary ones opportunistically use the available channels. The borrowing concept is introduced to increase the resource availability at the base station level. Evaluations are carried via service retainability, service completions and cumulative effect analysis as relevant secondary users's metrics. The results provide guidelines for designing effective borrowing schemes in terms of quantity of the borrowed resources and the borrowing time duration.","PeriodicalId":165367,"journal":{"name":"2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128519307","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 : 2010-11-01DOI: 10.1109/ISABEL.2010.5702835
C. Kocks, A. Vießmann, Andrey Skrebtsov, G. Bruck, P. Jung
The recent years showed an increasing demand for higher data rates in communication systems in general. To keep up with the reduced time-to-market in this area, an elaborate prototyping concept is inevitable. The authors propose a prototyping platform which combines the advantages of the flexibility of a digital signal processor with the efficient parallelization capabilities of a field-programmable gate array. The primary purpose of this platform is to allow a real-time capable implementation of current as well as next generation communication standards. The focus has been put on the integration of the full communication chain from the antenna to the decoded bit stream. Since the ever increasing computational complexity complicates the dimensioning of such platforms, scalability was a crucial design constraint for the presented concept. Interconnecting multiple platforms can be used to establish even complex multi-antenna systems.
{"title":"eFalcon — A scalable prototyping platform for next generation communication systems","authors":"C. Kocks, A. Vießmann, Andrey Skrebtsov, G. Bruck, P. Jung","doi":"10.1109/ISABEL.2010.5702835","DOIUrl":"https://doi.org/10.1109/ISABEL.2010.5702835","url":null,"abstract":"The recent years showed an increasing demand for higher data rates in communication systems in general. To keep up with the reduced time-to-market in this area, an elaborate prototyping concept is inevitable. The authors propose a prototyping platform which combines the advantages of the flexibility of a digital signal processor with the efficient parallelization capabilities of a field-programmable gate array. The primary purpose of this platform is to allow a real-time capable implementation of current as well as next generation communication standards. The focus has been put on the integration of the full communication chain from the antenna to the decoded bit stream. Since the ever increasing computational complexity complicates the dimensioning of such platforms, scalability was a crucial design constraint for the presented concept. Interconnecting multiple platforms can be used to establish even complex multi-antenna systems.","PeriodicalId":165367,"journal":{"name":"2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010)","volume":"566 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123114707","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 : 2010-11-01DOI: 10.1109/ISABEL.2010.5702911
M. Strackx, E. D'Agostino, G. Vandenbosch, P. Reynaert, P. Leroux
A model for simulating reflections of ultrawideband (UWB) pulses in multilayered tissue structures, has been implemented and verified using commercially available software. The permittivity of the different layers was altered sequentially and the corresponding reflections have been analyzed. Building on these experiments, the use of pulsed UWB is envisaged for the in-vivo measurement of complex tissue permittivity, in a non invasive way. Eventually, we will apply this technique to radiotherapy, trying to correlate the changes in permittivity with the absorbed radiation dose. A measurement setup using Time-Domain Reflectometry (TDR) is proposed.
{"title":"Measuring material/tissue permittivity by UWB Time-domain Reflectometry techniques","authors":"M. Strackx, E. D'Agostino, G. Vandenbosch, P. Reynaert, P. Leroux","doi":"10.1109/ISABEL.2010.5702911","DOIUrl":"https://doi.org/10.1109/ISABEL.2010.5702911","url":null,"abstract":"A model for simulating reflections of ultrawideband (UWB) pulses in multilayered tissue structures, has been implemented and verified using commercially available software. The permittivity of the different layers was altered sequentially and the corresponding reflections have been analyzed. Building on these experiments, the use of pulsed UWB is envisaged for the in-vivo measurement of complex tissue permittivity, in a non invasive way. Eventually, we will apply this technique to radiotherapy, trying to correlate the changes in permittivity with the absorbed radiation dose. A measurement setup using Time-Domain Reflectometry (TDR) is proposed.","PeriodicalId":165367,"journal":{"name":"2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126254553","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 : 2010-11-01DOI: 10.1109/ISABEL.2010.5702882
F. Mesiti, M. Delgado, M. Mondin, F. Daneshgaran
This paper deals with the use of sparse-graph codes (and in particular, Low density Parity Check — LDPC — codes) for information reconciliation and pre-data sifting in Quantum Key Distribution (QKD). We model the overall channel used in QKD as the parallel of the quantum channel, where the actual quantum key is transmitted, and a public Additive White Gaussian Noise (AWGN) channel, where the parity check bits are transmitted. The metrics derived from the two channels are jointly processed at the receiver by properly combining the metrics derived from the two channels and exploiting capacity achieving soft-metric based iteratively decoded sparse-graph codes. The information derived from the iterative decoder are used to (1) perform error correction of the received q-bits; (2) detect the possible presence of unauthorized eavesdroppers; (3) perform pre-data sifting. The performance of the proposed mixed-soft-metric algorithms are studied via simulations as a function of the system parameters. The core ideas of the paper are: a) employing FEC coding as opposed to two-way communication for information reconciliation, minimizing the interactions between transmitter and receiver; b) exploiting all the available information for data processing at the receiver including information available from the quantum channel; c) using convergence properties of the code to estimate QBER and presence of an eavesdropper.1
{"title":"Sparse-graph codes for information reconciliation in QKD applications","authors":"F. Mesiti, M. Delgado, M. Mondin, F. Daneshgaran","doi":"10.1109/ISABEL.2010.5702882","DOIUrl":"https://doi.org/10.1109/ISABEL.2010.5702882","url":null,"abstract":"This paper deals with the use of sparse-graph codes (and in particular, Low density Parity Check — LDPC — codes) for information reconciliation and pre-data sifting in Quantum Key Distribution (QKD). We model the overall channel used in QKD as the parallel of the quantum channel, where the actual quantum key is transmitted, and a public Additive White Gaussian Noise (AWGN) channel, where the parity check bits are transmitted. The metrics derived from the two channels are jointly processed at the receiver by properly combining the metrics derived from the two channels and exploiting capacity achieving soft-metric based iteratively decoded sparse-graph codes. The information derived from the iterative decoder are used to (1) perform error correction of the received q-bits; (2) detect the possible presence of unauthorized eavesdroppers; (3) perform pre-data sifting. The performance of the proposed mixed-soft-metric algorithms are studied via simulations as a function of the system parameters. The core ideas of the paper are: a) employing FEC coding as opposed to two-way communication for information reconciliation, minimizing the interactions between transmitter and receiver; b) exploiting all the available information for data processing at the receiver including information available from the quantum channel; c) using convergence properties of the code to estimate QBER and presence of an eavesdropper.1","PeriodicalId":165367,"journal":{"name":"2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122691584","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 : 2010-11-01DOI: 10.1109/ISABEL.2010.5702847
Yuan Tian, Xia Lei, Yue Xiao, Shaoqian Li
In multi-user multi-input multi-output (MIMO) systems, multiple timing and frequency offsets may occur in the procedure of synchronization. Conventional MIMO synchronization methods deal with timing and frequency offsets separately. In fact, these methods can not achieve the best performances because the unknown parameters will interfere with each other. In this paper, we propose a joint timing-frequency offsets and channel estimation method in multi-user MIMO systems. Based on a maximum-likelihood (ML) estimation model, an iterative space-alternating generalized expectation-maximization (SAGE) estimator is adopted to solve the multi-dimensional extreme-value problem. Simulations show that the performances of the proposed scheme are better than the conventional method.
{"title":"An iterative synchronization scheme for multi-user MIMO systems","authors":"Yuan Tian, Xia Lei, Yue Xiao, Shaoqian Li","doi":"10.1109/ISABEL.2010.5702847","DOIUrl":"https://doi.org/10.1109/ISABEL.2010.5702847","url":null,"abstract":"In multi-user multi-input multi-output (MIMO) systems, multiple timing and frequency offsets may occur in the procedure of synchronization. Conventional MIMO synchronization methods deal with timing and frequency offsets separately. In fact, these methods can not achieve the best performances because the unknown parameters will interfere with each other. In this paper, we propose a joint timing-frequency offsets and channel estimation method in multi-user MIMO systems. Based on a maximum-likelihood (ML) estimation model, an iterative space-alternating generalized expectation-maximization (SAGE) estimator is adopted to solve the multi-dimensional extreme-value problem. Simulations show that the performances of the proposed scheme are better than the conventional method.","PeriodicalId":165367,"journal":{"name":"2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127954174","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 : 2010-11-01DOI: 10.1109/ISABEL.2010.5702855
A. Lanatà, G. Valenza, E. Scilingo
In this paper we implement an automatic procedure that is to be embedded in a wearable system in order to discriminate five arrhythmic classes of QRS complexes from normal ones. Due to the limited hardware resources offered by the wearable system, several requirements such as low computational cost, memory usage, reliability and real-time have to be addressed. In order to better comply with these requirements, the classification process is performed using features that can easily be extracted from the signals, i.e. magnitude and phase of the Fourier Transform (FT) applied to the QRS complexes. The ECG signals, from which QRS complexes are extracted, are gathered from the MIT-Arrhythmias Database. More specifically, three datasets of features are created: the first (alpha) is obtained from the magnitude, the second (beta) from the phase, and the third (gamma) from the union of the two. According to the results of the Royston Multivariate Normality Test, which verifies the gaussianity of the distribution of the three sets of features, a parametric, Nearest Mean Classifier (NMC), or non-parametric, MultiLayer Perceptron (MLP) classifier is used. The comparative performance evaluation is showed in terms of a confusion matrix obtained from twenty steps of cross validation. The matrices report the percentage of successful recognition of the six classes.
{"title":"The contribution of the phase spectrum in automatic multiple cardiac arrhythmias recognition in wearable systems","authors":"A. Lanatà, G. Valenza, E. Scilingo","doi":"10.1109/ISABEL.2010.5702855","DOIUrl":"https://doi.org/10.1109/ISABEL.2010.5702855","url":null,"abstract":"In this paper we implement an automatic procedure that is to be embedded in a wearable system in order to discriminate five arrhythmic classes of QRS complexes from normal ones. Due to the limited hardware resources offered by the wearable system, several requirements such as low computational cost, memory usage, reliability and real-time have to be addressed. In order to better comply with these requirements, the classification process is performed using features that can easily be extracted from the signals, i.e. magnitude and phase of the Fourier Transform (FT) applied to the QRS complexes. The ECG signals, from which QRS complexes are extracted, are gathered from the MIT-Arrhythmias Database. More specifically, three datasets of features are created: the first (alpha) is obtained from the magnitude, the second (beta) from the phase, and the third (gamma) from the union of the two. According to the results of the Royston Multivariate Normality Test, which verifies the gaussianity of the distribution of the three sets of features, a parametric, Nearest Mean Classifier (NMC), or non-parametric, MultiLayer Perceptron (MLP) classifier is used. The comparative performance evaluation is showed in terms of a confusion matrix obtained from twenty steps of cross validation. The matrices report the percentage of successful recognition of the six classes.","PeriodicalId":165367,"journal":{"name":"2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010)","volume":"138 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116408302","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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