Pub Date : 1992-11-16DOI: 10.1109/ICCS.1992.255034
Xiongyan Tang, P. Ye
This paper proposes a systematic design theory for the 'Bell scheme' (J. Lightwave Technol. vol.9, p.194 (1991)). The design requirements and procedure are discussed. Some optimal system examples are given.<>
{"title":"Design theory for long haul optical soliton communication systems with lumped amplifiers","authors":"Xiongyan Tang, P. Ye","doi":"10.1109/ICCS.1992.255034","DOIUrl":"https://doi.org/10.1109/ICCS.1992.255034","url":null,"abstract":"This paper proposes a systematic design theory for the 'Bell scheme' (J. Lightwave Technol. vol.9, p.194 (1991)). The design requirements and procedure are discussed. Some optimal system examples are given.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115821304","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 : 1992-11-16DOI: 10.1109/ICCS.1992.254923
S. Dudukovich
The aim of the paper is to establish optimality criterion for measuring-estimation system evaluation to propose the estimation filter for the rejection of rocket pressure measuring deformations, assuming that the measured signal at the output of measuring device, is nonstationary non-Gaussian signal and, to use real rocket pressure measurements to compare performance of known and proposed estimation filters.<>
{"title":"Entropy analysis of rocket pressure measuring system","authors":"S. Dudukovich","doi":"10.1109/ICCS.1992.254923","DOIUrl":"https://doi.org/10.1109/ICCS.1992.254923","url":null,"abstract":"The aim of the paper is to establish optimality criterion for measuring-estimation system evaluation to propose the estimation filter for the rejection of rocket pressure measuring deformations, assuming that the measured signal at the output of measuring device, is nonstationary non-Gaussian signal and, to use real rocket pressure measurements to compare performance of known and proposed estimation filters.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130058240","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 : 1992-11-16DOI: 10.1109/ICCS.1992.254884
T. Uyematsu, K. Kikuchi, K. Sakaniwa
The authors propose a new optical communication system called the multilevel photon communication system and clarifies the effect of combined coding and modulation. The multilevel optical communication system consists of a multilevel intensity modulator and photon counting receiver. They derive an upper bound on the error event probability for the trellis coded multilevel photon communication system. This bound shows that the distance between optical signal sequences may be considered as the Euclidean distance although the photon channel is not a Gaussian channel. The design the optical signal set for a four-level photon communication system so that the codes obtained by Ungerboeck for the additive white Gaussian noise (AWGN) channel become optimum. It is shown that coding gains of more than 4.6 dB over uncoded binary communication are attainable by using Ungerboeck's codes. They also show that multidimensional trellis coded modulation employing multidimensional signals can yield significant coding gains without increasing the complexities of the codes.<>
{"title":"Trellis coded modulation for multilevel photon communication system","authors":"T. Uyematsu, K. Kikuchi, K. Sakaniwa","doi":"10.1109/ICCS.1992.254884","DOIUrl":"https://doi.org/10.1109/ICCS.1992.254884","url":null,"abstract":"The authors propose a new optical communication system called the multilevel photon communication system and clarifies the effect of combined coding and modulation. The multilevel optical communication system consists of a multilevel intensity modulator and photon counting receiver. They derive an upper bound on the error event probability for the trellis coded multilevel photon communication system. This bound shows that the distance between optical signal sequences may be considered as the Euclidean distance although the photon channel is not a Gaussian channel. The design the optical signal set for a four-level photon communication system so that the codes obtained by Ungerboeck for the additive white Gaussian noise (AWGN) channel become optimum. It is shown that coding gains of more than 4.6 dB over uncoded binary communication are attainable by using Ungerboeck's codes. They also show that multidimensional trellis coded modulation employing multidimensional signals can yield significant coding gains without increasing the complexities of the codes.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131480393","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 : 1992-11-16DOI: 10.1109/ICCS.1992.255186
T. Saito, T. Komatsu, K. Aizawa
Some research institutes are elaborating plans to develop very high definition (VHD) visual media beyond the HDTV. Although a CCD camera with two million pixels has been developed for HDTV, the spatial resolution should be increased further to acquire VHD images. Reducing the pixel size is the most straightforward way to increase the spatial resolution, which makes a CCD imager much more sensitive to shot noise. To keep shot noise invisible on a monitor, there needs to be a limitation in the pixel size reduction. The current CCD technology has almost reached this limit. Therefore, a new approach is required to enhance the spatial resolution further beyond this limit. The authors present a new method for acquiring VHD images by processing and integrating multiple images taken simultaneously with different cameras.<>
{"title":"Very high resolution image acquisition through image reconstruction from lower resolution images taken with multiple cameras","authors":"T. Saito, T. Komatsu, K. Aizawa","doi":"10.1109/ICCS.1992.255186","DOIUrl":"https://doi.org/10.1109/ICCS.1992.255186","url":null,"abstract":"Some research institutes are elaborating plans to develop very high definition (VHD) visual media beyond the HDTV. Although a CCD camera with two million pixels has been developed for HDTV, the spatial resolution should be increased further to acquire VHD images. Reducing the pixel size is the most straightforward way to increase the spatial resolution, which makes a CCD imager much more sensitive to shot noise. To keep shot noise invisible on a monitor, there needs to be a limitation in the pixel size reduction. The current CCD technology has almost reached this limit. Therefore, a new approach is required to enhance the spatial resolution further beyond this limit. The authors present a new method for acquiring VHD images by processing and integrating multiple images taken simultaneously with different cameras.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131499462","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 : 1992-11-16DOI: 10.1109/ICCS.1992.255190
Takaaki Hasegawa, Keiichi Ohtani
The authors propose a new speech communication system to convert an oral image into voice, called image input microphone. This system synthesizes the voice from only the oral image. It provides high security and is not affected by acoustic noise. Since the voice is synthesized without recognition, this system is independent of languages. Simulations to convert oral image to voice for five Japanese vowels were carried out. A vocal tract area function is estimated from the oral image, and a PARCOR synthesis filter is obtained from the vocal tract area function. The PARCOR synthesis filter is driven by a pulse train. The performance of this system is evaluated by hearing tests of the synthesized voice. As a result, an audible voice has been synthesized and the mean recognition rate of five Japanese vowels has been 91(%).<>
{"title":"Oral image to voice converter-image input microphone","authors":"Takaaki Hasegawa, Keiichi Ohtani","doi":"10.1109/ICCS.1992.255190","DOIUrl":"https://doi.org/10.1109/ICCS.1992.255190","url":null,"abstract":"The authors propose a new speech communication system to convert an oral image into voice, called image input microphone. This system synthesizes the voice from only the oral image. It provides high security and is not affected by acoustic noise. Since the voice is synthesized without recognition, this system is independent of languages. Simulations to convert oral image to voice for five Japanese vowels were carried out. A vocal tract area function is estimated from the oral image, and a PARCOR synthesis filter is obtained from the vocal tract area function. The PARCOR synthesis filter is driven by a pulse train. The performance of this system is evaluated by hearing tests of the synthesized voice. As a result, an audible voice has been synthesized and the mean recognition rate of five Japanese vowels has been 91(%).<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"144 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131573139","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 : 1992-11-16DOI: 10.1109/ICCS.1992.254947
Jinho Choi, I. Song, S. Park, J. Yun
A new problem, estimation of the direction of arrival (DOA) without knowing (or assuming) the number of signal sources, is addressed. The authors propose a method which is related to both the multiple signal classification (MUSIC) and Capon's methods. The performance of the proposed method when the number of signal sources is unknown is shown to be almost the same as that of the MUSIC method when the number of signal sources is exactly known.<>
{"title":"Direction of arrival estimation with unknown number of signal sources","authors":"Jinho Choi, I. Song, S. Park, J. Yun","doi":"10.1109/ICCS.1992.254947","DOIUrl":"https://doi.org/10.1109/ICCS.1992.254947","url":null,"abstract":"A new problem, estimation of the direction of arrival (DOA) without knowing (or assuming) the number of signal sources, is addressed. The authors propose a method which is related to both the multiple signal classification (MUSIC) and Capon's methods. The performance of the proposed method when the number of signal sources is unknown is shown to be almost the same as that of the MUSIC method when the number of signal sources is exactly known.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133009192","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 : 1992-11-16DOI: 10.1109/ICCS.1992.254922
B. Yegnanarayana, H. Chouhan, C. Chandra Sekhar
The authors consider the problem of active sonar target classification based on the targets' material composition using a radial basis function (RBF) network. Sonar target responses were measured under controlled laboratory conditions in a laboratory tank. Spherical targets of different material composition were used. An important task in the design of RBF networks is the appropriate choice of the RBF centers. They propose a Karhunen-Loeve (KL) expansion based approach for centre selection. Results of the classification performance of the RBF network trained using the KL expansion based training procedure are provided.<>
{"title":"Sonar target recognition using radial basis function networks","authors":"B. Yegnanarayana, H. Chouhan, C. Chandra Sekhar","doi":"10.1109/ICCS.1992.254922","DOIUrl":"https://doi.org/10.1109/ICCS.1992.254922","url":null,"abstract":"The authors consider the problem of active sonar target classification based on the targets' material composition using a radial basis function (RBF) network. Sonar target responses were measured under controlled laboratory conditions in a laboratory tank. Spherical targets of different material composition were used. An important task in the design of RBF networks is the appropriate choice of the RBF centers. They propose a Karhunen-Loeve (KL) expansion based approach for centre selection. Results of the classification performance of the RBF network trained using the KL expansion based training procedure are provided.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133549969","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 : 1992-11-16DOI: 10.1109/ICCS.1992.255009
M. Kashimura, Y. Sato, S. Ozawa
The authors try to represent a image with triangular patches. The triangular patch is defined as a triangle with linearly varying gray-level within it. To represent an image with triangular patches effectively for the human visual system, and to describe these triangular patches with small amount of data, the authors have tried to get a new style image coding method at very low bit rate. At first, a modified Delaunay triangulation algorithm is applied to the feature points extracted on the boundary lines in the image. Then linear interpolation is done within every triangular region using the gray-value at these feature points. Thus the approximately represented image is described with triangular patches. Using this image description method, an image coding method with progressive build-up is proposed. By the simulation results and subjective tests, it is confirmed that this coding scheme using triangular patch structure is effective at super-low bit rate.<>
{"title":"Image description for coding using triangular patch structure","authors":"M. Kashimura, Y. Sato, S. Ozawa","doi":"10.1109/ICCS.1992.255009","DOIUrl":"https://doi.org/10.1109/ICCS.1992.255009","url":null,"abstract":"The authors try to represent a image with triangular patches. The triangular patch is defined as a triangle with linearly varying gray-level within it. To represent an image with triangular patches effectively for the human visual system, and to describe these triangular patches with small amount of data, the authors have tried to get a new style image coding method at very low bit rate. At first, a modified Delaunay triangulation algorithm is applied to the feature points extracted on the boundary lines in the image. Then linear interpolation is done within every triangular region using the gray-value at these feature points. Thus the approximately represented image is described with triangular patches. Using this image description method, an image coding method with progressive build-up is proposed. By the simulation results and subjective tests, it is confirmed that this coding scheme using triangular patch structure is effective at super-low bit rate.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"483 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132649829","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 : 1992-11-16DOI: 10.1109/ICCS.1992.254926
T. Miyajima, T. Hasegawa
Evaluates the performance of decision feedback equalizers (DFE) using multilayer neural networks under frequency selective fading channels. A novel DFE is proposed. The proposed DFE uses a neural network which carries out unsupervised learning selectively in a tracking mode. The neural network used can avoid false learning caused by incorrect teacher signals by setting the appropriate threshold to decide whether the learning should be carried out or not. The fading channel to be considered is frequency selective and its statistical characteristics are Rayleigh. Simulation results show that the performance of the DFE using the conventional neural network is superior to that of the conventional DFE and also show that the performance of the proposed DFE is superior to that of the DFE using the conventional neural network.<>
{"title":"Performances of decision feedback equalizers using neural networks under frequency selective fading channels","authors":"T. Miyajima, T. Hasegawa","doi":"10.1109/ICCS.1992.254926","DOIUrl":"https://doi.org/10.1109/ICCS.1992.254926","url":null,"abstract":"Evaluates the performance of decision feedback equalizers (DFE) using multilayer neural networks under frequency selective fading channels. A novel DFE is proposed. The proposed DFE uses a neural network which carries out unsupervised learning selectively in a tracking mode. The neural network used can avoid false learning caused by incorrect teacher signals by setting the appropriate threshold to decide whether the learning should be carried out or not. The fading channel to be considered is frequency selective and its statistical characteristics are Rayleigh. Simulation results show that the performance of the DFE using the conventional neural network is superior to that of the conventional DFE and also show that the performance of the proposed DFE is superior to that of the DFE using the conventional neural network.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133209461","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 : 1992-11-16DOI: 10.1109/ICCS.1992.255084
Q. Dai, E. Shwedyk
The sequential sequence estimator is based on a set of whitening Kalman filters. It has considerably less computational complexity with an error performance almost identical to that of the maximum likelihood sequence estimation. Due to the presence of both fading and ISI, the error probability is still poor. To improve the error performance, diversity transmission is investigated. The error performance and computational complexity are simulated by computer for two different fading channel models. Comparisons with analytical predictions show good agreement.<>
{"title":"Sequential sequence estimation of bandlimited signals over a frequency selective Rayleigh channel","authors":"Q. Dai, E. Shwedyk","doi":"10.1109/ICCS.1992.255084","DOIUrl":"https://doi.org/10.1109/ICCS.1992.255084","url":null,"abstract":"The sequential sequence estimator is based on a set of whitening Kalman filters. It has considerably less computational complexity with an error performance almost identical to that of the maximum likelihood sequence estimation. Due to the presence of both fading and ISI, the error probability is still poor. To improve the error performance, diversity transmission is investigated. The error performance and computational complexity are simulated by computer for two different fading channel models. Comparisons with analytical predictions show good agreement.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133241736","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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