Pub Date : 1996-05-05DOI: 10.1109/ICCT.1996.545253
Guo Nan, H. Fuming
In this paper the concept of rate variable multidimensional DS/SS communication systems is proposed. First, a multidimensional DS/SS communication system is introduced. Then a simple method to get rate variability is presented, indicating that it is important to find a set of optimized "medium codes" and a set of optimized mappings according to the information symbols with various lengths under given conditions, where the medium codes and the mappings have great impact on the system performance. Finally, as an example a set of good mappings and numerical results are provided based on a practical efficient DS/SS scheme.
{"title":"The constructure of rate variable multidimensional DS/SS communication systems","authors":"Guo Nan, H. Fuming","doi":"10.1109/ICCT.1996.545253","DOIUrl":"https://doi.org/10.1109/ICCT.1996.545253","url":null,"abstract":"In this paper the concept of rate variable multidimensional DS/SS communication systems is proposed. First, a multidimensional DS/SS communication system is introduced. Then a simple method to get rate variability is presented, indicating that it is important to find a set of optimized \"medium codes\" and a set of optimized mappings according to the information symbols with various lengths under given conditions, where the medium codes and the mappings have great impact on the system performance. Finally, as an example a set of good mappings and numerical results are provided based on a practical efficient DS/SS scheme.","PeriodicalId":395678,"journal":{"name":"Proceedings of International Conference on Communication Technology. ICCT '96","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123044644","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 : 1996-05-05DOI: 10.1109/ICCT.1996.545251
Changoo Lee, Hyo-Joong Kim, Sungsoo Kang, M. Lee
In an optical subscriber loop that utilizes TDMA (time division multiple access) technology with a single mode fiber, the data from subscribers are in burst-mode. While transmitting the burst-mode data there are penalties in the optical link budget: timing jitter in the recovered data stream and the loss of the header in the subscribers' data stream cause poor transmission performance. In this paper, the technical issues for burst-mode data transmission in the access passive optical network (PON) are discussed, and through systematic evaluation results, it is experimentally demonstrated that transmission is effective in an access PON with a 17 dB budget and good BER performance.
{"title":"A systematic evaluation on burst-mode data transmission in passive optical access network","authors":"Changoo Lee, Hyo-Joong Kim, Sungsoo Kang, M. Lee","doi":"10.1109/ICCT.1996.545251","DOIUrl":"https://doi.org/10.1109/ICCT.1996.545251","url":null,"abstract":"In an optical subscriber loop that utilizes TDMA (time division multiple access) technology with a single mode fiber, the data from subscribers are in burst-mode. While transmitting the burst-mode data there are penalties in the optical link budget: timing jitter in the recovered data stream and the loss of the header in the subscribers' data stream cause poor transmission performance. In this paper, the technical issues for burst-mode data transmission in the access passive optical network (PON) are discussed, and through systematic evaluation results, it is experimentally demonstrated that transmission is effective in an access PON with a 17 dB budget and good BER performance.","PeriodicalId":395678,"journal":{"name":"Proceedings of International Conference on Communication Technology. ICCT '96","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124027190","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 : 1996-05-05DOI: 10.1109/ICCT.1996.545257
Hongnian Xing, P. Jarske
The combination of orthogonal frequency division multiplexing (OFDM) with direct sequence spread spectrum (DS/SS) is suitable for the design of a multiuser system robust against channel impairments. We propose a frequency domain equalization method for the OFDM-DS/SS system in mobile fading channels. It is shown that the learning constant is a key factor which is chosen depending on the channel conditions. By using the adaptive teaching constant, the average performance of the equalizer can be improved.
{"title":"Frequency domain equalization for the multicarrier spread spectrum system in multipath fading channel","authors":"Hongnian Xing, P. Jarske","doi":"10.1109/ICCT.1996.545257","DOIUrl":"https://doi.org/10.1109/ICCT.1996.545257","url":null,"abstract":"The combination of orthogonal frequency division multiplexing (OFDM) with direct sequence spread spectrum (DS/SS) is suitable for the design of a multiuser system robust against channel impairments. We propose a frequency domain equalization method for the OFDM-DS/SS system in mobile fading channels. It is shown that the learning constant is a key factor which is chosen depending on the channel conditions. By using the adaptive teaching constant, the average performance of the equalizer can be improved.","PeriodicalId":395678,"journal":{"name":"Proceedings of International Conference on Communication Technology. ICCT '96","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121437840","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 : 1996-05-05DOI: 10.1109/ICCT.1996.544998
Y. Song, Dae Jung Kim, K. Y. Han
We propose an improved Gaussian baseband filtered minimum shift keying (GMSK) quadrature modulator using a finite impulse response (FIR) filter whose coefficients are given by the difference of the phase response to remove the coefficient noise resulting from the conventional method. The modulator is designed by considering the effects resulting from the difference between the ideal analog signal and its digitized version in terms of the sampling noise, quantization noise, truncation noise, and coefficient noise. It is also confirmed by an experiment that it can be used for a digital cellular system.
{"title":"Design of improved GMSK quadrature modulator","authors":"Y. Song, Dae Jung Kim, K. Y. Han","doi":"10.1109/ICCT.1996.544998","DOIUrl":"https://doi.org/10.1109/ICCT.1996.544998","url":null,"abstract":"We propose an improved Gaussian baseband filtered minimum shift keying (GMSK) quadrature modulator using a finite impulse response (FIR) filter whose coefficients are given by the difference of the phase response to remove the coefficient noise resulting from the conventional method. The modulator is designed by considering the effects resulting from the difference between the ideal analog signal and its digitized version in terms of the sampling noise, quantization noise, truncation noise, and coefficient noise. It is also confirmed by an experiment that it can be used for a digital cellular system.","PeriodicalId":395678,"journal":{"name":"Proceedings of International Conference on Communication Technology. ICCT '96","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128474245","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 : 1996-05-05DOI: 10.1109/ICCT.1996.545206
K. Thomas
Telecommunications is an important element of a country's infrastructure. Without telecommunications, the development of a modern industrial society is almost inconceivable. We experienced this ourselves in Germany after reunification with what was then the GDR. When Deutsche Telekom took charge of the development and operation of the telecommunications networks in eastern Germany, the company immediately came under enormous pressure to modernise the completely outdated inadequate communications infrastructure in eastern Germany as quickly as possible. Business users in particular urgently wanted telephone lines and other telecommunications facilities in order to carry our their activities. The author outlines the general ideas on strategies for developing network services. Firstly, progress made in a series of key technologies has led to communications networks becoming more and more efficient. Secondly, increasing deregulation of the markets has given rise to competition, which, together with the third aspect, namely higher customer requirements, has led to network operators doing their utmost to respond to their customers' wishes as quickly and flexibly as possible.
{"title":"Advanced telecommunications networks and services, important prerequisites for the performance of modern economies","authors":"K. Thomas","doi":"10.1109/ICCT.1996.545206","DOIUrl":"https://doi.org/10.1109/ICCT.1996.545206","url":null,"abstract":"Telecommunications is an important element of a country's infrastructure. Without telecommunications, the development of a modern industrial society is almost inconceivable. We experienced this ourselves in Germany after reunification with what was then the GDR. When Deutsche Telekom took charge of the development and operation of the telecommunications networks in eastern Germany, the company immediately came under enormous pressure to modernise the completely outdated inadequate communications infrastructure in eastern Germany as quickly as possible. Business users in particular urgently wanted telephone lines and other telecommunications facilities in order to carry our their activities. The author outlines the general ideas on strategies for developing network services. Firstly, progress made in a series of key technologies has led to communications networks becoming more and more efficient. Secondly, increasing deregulation of the markets has given rise to competition, which, together with the third aspect, namely higher customer requirements, has led to network operators doing their utmost to respond to their customers' wishes as quickly and flexibly as possible.","PeriodicalId":395678,"journal":{"name":"Proceedings of International Conference on Communication Technology. ICCT '96","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129058067","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 : 1996-05-05DOI: 10.1109/ICCT.1996.545164
Eun-Hyang Lee, H. Chang, S. Jun, Ju-Hyun Cho
Real-time software tools and effective operating system supports are essential to reduce the complexity of real-time software developments such as a switching system. In this paper, we propose a new advanced cross debugging architecture based on a network transparent and connection independent client-server model. It enables more flexible interactive debugging of a program, including the design and the implementation of such toots. It also enables easy and efficient monitoring of the behaviour of target system.
{"title":"A cross debugging architecture for switching software","authors":"Eun-Hyang Lee, H. Chang, S. Jun, Ju-Hyun Cho","doi":"10.1109/ICCT.1996.545164","DOIUrl":"https://doi.org/10.1109/ICCT.1996.545164","url":null,"abstract":"Real-time software tools and effective operating system supports are essential to reduce the complexity of real-time software developments such as a switching system. In this paper, we propose a new advanced cross debugging architecture based on a network transparent and connection independent client-server model. It enables more flexible interactive debugging of a program, including the design and the implementation of such toots. It also enables easy and efficient monitoring of the behaviour of target system.","PeriodicalId":395678,"journal":{"name":"Proceedings of International Conference on Communication Technology. ICCT '96","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115873453","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 : 1996-05-05DOI: 10.1109/ICCT.1996.545180
L.S. Zhang, R. Sheriff, Y. Hu
Based on the data generated for traffic volume estimation for satellite mobile systems, and by utilising computer simulations, the general statistical characteristics of non-geostationary (non-GEO) satellite beam traffic are presented. Simulation results show that the traffic level in a non-GEO satellite beam varies dramatically and with a wide dynamic range. This is significantly different from the case of geostationary satellite and terrestrial cellular networks.
{"title":"Simulation of traffic characteristics of non-geostationary satellite systems","authors":"L.S. Zhang, R. Sheriff, Y. Hu","doi":"10.1109/ICCT.1996.545180","DOIUrl":"https://doi.org/10.1109/ICCT.1996.545180","url":null,"abstract":"Based on the data generated for traffic volume estimation for satellite mobile systems, and by utilising computer simulations, the general statistical characteristics of non-geostationary (non-GEO) satellite beam traffic are presented. Simulation results show that the traffic level in a non-GEO satellite beam varies dramatically and with a wide dynamic range. This is significantly different from the case of geostationary satellite and terrestrial cellular networks.","PeriodicalId":395678,"journal":{"name":"Proceedings of International Conference on Communication Technology. ICCT '96","volume":"129 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115890912","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 : 1996-05-05DOI: 10.1109/ICCT.1996.544988
Zhao Ming, W. Jing, X. Xibin, Yao Yann
Each wireless technology now used is optimized just for some particular applications and environments. However, the next generation wireless networks coexisting with fiber-optic based broadband communication networks will be required to operate over a wide range of cell size (from picocell to massive satellite cell) and offer multimedia services where each service may have a unique rate. A new architecture of wireless network, wireless ATM, is proposed in this paper, which consolidates various radio environments and applications under a single protocol. The wireless ATM architecture embedded into B-ISDN protocol stack can adapt a wide range of physical channels. In the last section, flow control, the key technique of multiplex and multiple access in wireless ATM, is described.
{"title":"The research on wireless ATM architecture","authors":"Zhao Ming, W. Jing, X. Xibin, Yao Yann","doi":"10.1109/ICCT.1996.544988","DOIUrl":"https://doi.org/10.1109/ICCT.1996.544988","url":null,"abstract":"Each wireless technology now used is optimized just for some particular applications and environments. However, the next generation wireless networks coexisting with fiber-optic based broadband communication networks will be required to operate over a wide range of cell size (from picocell to massive satellite cell) and offer multimedia services where each service may have a unique rate. A new architecture of wireless network, wireless ATM, is proposed in this paper, which consolidates various radio environments and applications under a single protocol. The wireless ATM architecture embedded into B-ISDN protocol stack can adapt a wide range of physical channels. In the last section, flow control, the key technique of multiplex and multiple access in wireless ATM, is described.","PeriodicalId":395678,"journal":{"name":"Proceedings of International Conference on Communication Technology. ICCT '96","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117232500","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 : 1996-05-05DOI: 10.1109/ICCT.1996.545011
C.Q. Yang
The paper introduces the Personal Access Communications System (PACS) as one of the most promising new PCS technologies available today. In particular, the features and functions of PACS-based PCS network are discussed. The PACS-based system distinguishes itself from other low tier options such as DECT and PHS by its lower delay, higher capacity, better receiver sensitivity, improved system broadcast capability, and improved mobility. It is shown that PACS could provide an attractive alternative for many wireless applications including personal mobility, neighborhood PCS, wireless local loop, and wireless Centrex/PBX.
{"title":"PACS: the core of next generation PCS","authors":"C.Q. Yang","doi":"10.1109/ICCT.1996.545011","DOIUrl":"https://doi.org/10.1109/ICCT.1996.545011","url":null,"abstract":"The paper introduces the Personal Access Communications System (PACS) as one of the most promising new PCS technologies available today. In particular, the features and functions of PACS-based PCS network are discussed. The PACS-based system distinguishes itself from other low tier options such as DECT and PHS by its lower delay, higher capacity, better receiver sensitivity, improved system broadcast capability, and improved mobility. It is shown that PACS could provide an attractive alternative for many wireless applications including personal mobility, neighborhood PCS, wireless local loop, and wireless Centrex/PBX.","PeriodicalId":395678,"journal":{"name":"Proceedings of International Conference on Communication Technology. ICCT '96","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127196593","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 : 1996-05-05DOI: 10.1109/ICCT.1996.545146
Teh-Chao C. Hsu, J. Kenevan, G. Kraft
The paper studies the potential of applying the IN/ISDN based Bellcore architecture in the personal communication services (PCS) environment. It studies the mapping between the home location registers (HLRs) to visiting location registers (VLRs) in a service control point (SCP) to ensure an efficient call delivery for the Bellcore architecture based PCS.
{"title":"Performance simulation of intelligent network based personal communication services","authors":"Teh-Chao C. Hsu, J. Kenevan, G. Kraft","doi":"10.1109/ICCT.1996.545146","DOIUrl":"https://doi.org/10.1109/ICCT.1996.545146","url":null,"abstract":"The paper studies the potential of applying the IN/ISDN based Bellcore architecture in the personal communication services (PCS) environment. It studies the mapping between the home location registers (HLRs) to visiting location registers (VLRs) in a service control point (SCP) to ensure an efficient call delivery for the Bellcore architecture based PCS.","PeriodicalId":395678,"journal":{"name":"Proceedings of International Conference on Communication Technology. ICCT '96","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127380408","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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