Pub Date : 2000-02-15DOI: 10.1109/IZSBC.2000.829268
E. Jugl, H. Boche
The phenomenon that the probability density function (PDF) of the velocity of the boundary-crossing subscribers is different from that of all other subscribers has already been known for a long time (called biased sampling). This paper investigates the implication of this phenomenon with regard to the channel holding time and thus to the signaling traffic. A significant impact on analytical performance evaluations of mobile communication systems can be observed.
{"title":"Influence of biased sampling on mobile communication systems","authors":"E. Jugl, H. Boche","doi":"10.1109/IZSBC.2000.829268","DOIUrl":"https://doi.org/10.1109/IZSBC.2000.829268","url":null,"abstract":"The phenomenon that the probability density function (PDF) of the velocity of the boundary-crossing subscribers is different from that of all other subscribers has already been known for a long time (called biased sampling). This paper investigates the implication of this phenomenon with regard to the channel holding time and thus to the signaling traffic. A significant impact on analytical performance evaluations of mobile communication systems can be observed.","PeriodicalId":409898,"journal":{"name":"2000 International Zurich Seminar on Broadband Communications. Accessing, Transmission, Networking. Proceedings (Cat. No.00TH8475)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128153953","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 : 2000-02-15DOI: 10.1109/IZSBC.2000.829248
T. Bostoen, O. van de Wiel
The low-voltage power distribution network is characterized in the frequency band from 0.5 MHz to 30 MHz for broadband powerline communications (PLC). Therefore the different cables that constitute the network are modelled by their per-unit-length parameters. These cable models are combined with the network topology to derive the PLC channel transfer function.
{"title":"Modelling the low-voltage power distribution network in the frequency band from 0.5 MHz to 30 MHz for broadband powerline communications (PLC)","authors":"T. Bostoen, O. van de Wiel","doi":"10.1109/IZSBC.2000.829248","DOIUrl":"https://doi.org/10.1109/IZSBC.2000.829248","url":null,"abstract":"The low-voltage power distribution network is characterized in the frequency band from 0.5 MHz to 30 MHz for broadband powerline communications (PLC). Therefore the different cables that constitute the network are modelled by their per-unit-length parameters. These cable models are combined with the network topology to derive the PLC channel transfer function.","PeriodicalId":409898,"journal":{"name":"2000 International Zurich Seminar on Broadband Communications. Accessing, Transmission, Networking. Proceedings (Cat. No.00TH8475)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131938295","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 : 2000-02-15DOI: 10.1109/IZSBC.2000.829237
S. Perreau, L. White
In this paper, we present a method for jointly estimating time varying channels and detecting the sequence of information bits for space-time codes. This work is motivated by the fact that the bandwidth and power efficiency of space-time codes can be significantly degraded in the presence of channel estimation errors due to mobility and multipath. Our method does not require the use of a training sequence or any statistical assumptions on the channel characteristics. We explicitly use the knowledge of the space-time codes and therefore, fully exploit their property of space/time diversity. We present in this draft simulation examples which show the ability of the algorithm to track variations of the channels.
{"title":"Channel estimation and symbol detection for space-time codes in mobility conditions","authors":"S. Perreau, L. White","doi":"10.1109/IZSBC.2000.829237","DOIUrl":"https://doi.org/10.1109/IZSBC.2000.829237","url":null,"abstract":"In this paper, we present a method for jointly estimating time varying channels and detecting the sequence of information bits for space-time codes. This work is motivated by the fact that the bandwidth and power efficiency of space-time codes can be significantly degraded in the presence of channel estimation errors due to mobility and multipath. Our method does not require the use of a training sequence or any statistical assumptions on the channel characteristics. We explicitly use the knowledge of the space-time codes and therefore, fully exploit their property of space/time diversity. We present in this draft simulation examples which show the ability of the algorithm to track variations of the channels.","PeriodicalId":409898,"journal":{"name":"2000 International Zurich Seminar on Broadband Communications. Accessing, Transmission, Networking. Proceedings (Cat. No.00TH8475)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132786228","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 : 2000-02-15DOI: 10.1109/IZSBC.2000.829262
P.J. Schreier, D. Costello
Block codes for use in turbo coding schemes provide an alternative to punctured convolutional codes when high rate component codes are needed. Since block codes have large, time-varying trellis diagrams, full maximum a posteriori (MAP) soft-in soft-out decoders are very complex. It is shown how to modify the MAP algorithm to utilize a sectionalized trellis diagram of the dual code for decoding, which minimizes computational complexity for high rate component codes. This paper also gives simulation results for some high rate block turbo codes.
{"title":"MAP decoding of linear block codes based on a sectionalized trellis of the dual code","authors":"P.J. Schreier, D. Costello","doi":"10.1109/IZSBC.2000.829262","DOIUrl":"https://doi.org/10.1109/IZSBC.2000.829262","url":null,"abstract":"Block codes for use in turbo coding schemes provide an alternative to punctured convolutional codes when high rate component codes are needed. Since block codes have large, time-varying trellis diagrams, full maximum a posteriori (MAP) soft-in soft-out decoders are very complex. It is shown how to modify the MAP algorithm to utilize a sectionalized trellis diagram of the dual code for decoding, which minimizes computational complexity for high rate component codes. This paper also gives simulation results for some high rate block turbo codes.","PeriodicalId":409898,"journal":{"name":"2000 International Zurich Seminar on Broadband Communications. Accessing, Transmission, Networking. Proceedings (Cat. No.00TH8475)","volume":"201 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116506825","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 : 2000-02-15DOI: 10.1109/IZSBC.2000.829227
C. Sankaran, A. Ephremides
In this paper, we develop several multicast routing algorithms for wireless networks and compare their performance. Using a CDMA framework, we demonstrate how capacity results for multiuser detectors can be used to develop link power metrics for the routing problem.
{"title":"Multicasting with multiuser detection in ad-hoc wireless networks","authors":"C. Sankaran, A. Ephremides","doi":"10.1109/IZSBC.2000.829227","DOIUrl":"https://doi.org/10.1109/IZSBC.2000.829227","url":null,"abstract":"In this paper, we develop several multicast routing algorithms for wireless networks and compare their performance. Using a CDMA framework, we demonstrate how capacity results for multiuser detectors can be used to develop link power metrics for the routing problem.","PeriodicalId":409898,"journal":{"name":"2000 International Zurich Seminar on Broadband Communications. Accessing, Transmission, Networking. Proceedings (Cat. No.00TH8475)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129258820","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 : 2000-02-15DOI: 10.1109/IZSBC.2000.829265
D. Vali, L. Merakos
The basic concepts of the MAC (medium access control) protocol and the underlying traffic scheduling algorithm developed within the ACTS (Advanced Communications Technologies and Services) project Magic WAND (Wireless ATM Network Demonstrator) are outlined. A novel multiple access technique for the radio interface of WAND is proposed. Simulation results, showing that the proposed technique significantly improves system performance, are also presented.
{"title":"An efficient multiple access technique for wireless ATM networks with QoS guarantees","authors":"D. Vali, L. Merakos","doi":"10.1109/IZSBC.2000.829265","DOIUrl":"https://doi.org/10.1109/IZSBC.2000.829265","url":null,"abstract":"The basic concepts of the MAC (medium access control) protocol and the underlying traffic scheduling algorithm developed within the ACTS (Advanced Communications Technologies and Services) project Magic WAND (Wireless ATM Network Demonstrator) are outlined. A novel multiple access technique for the radio interface of WAND is proposed. Simulation results, showing that the proposed technique significantly improves system performance, are also presented.","PeriodicalId":409898,"journal":{"name":"2000 International Zurich Seminar on Broadband Communications. Accessing, Transmission, Networking. Proceedings (Cat. No.00TH8475)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128029169","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 : 2000-02-15DOI: 10.1109/IZSBC.2000.829245
O. Kunert
Field buses have been developed to fulfil real-time requirements of applications related to factory automation. However, they can only cover geographical areas such as factory halls or buildings which causes the occurrence of many small segments in larger environments unable to communicate among each other. In order to reduce this drawback a possible solution is to connect those field bus segments using interworking devices and a backbone network. A suitable backbone could be an ATM network. An interworking concept based on PROFIBUS/ATM bridges is presented in this paper. Simulations of an example PROFIBUS system were performed in order to study overall system behavior, to evaluate the feasibility of the presented concept and to show its limitations concerning the range of PROFIBUS applications it is suited for.
{"title":"Interworking between independent PROFIBUSes through ATM networks","authors":"O. Kunert","doi":"10.1109/IZSBC.2000.829245","DOIUrl":"https://doi.org/10.1109/IZSBC.2000.829245","url":null,"abstract":"Field buses have been developed to fulfil real-time requirements of applications related to factory automation. However, they can only cover geographical areas such as factory halls or buildings which causes the occurrence of many small segments in larger environments unable to communicate among each other. In order to reduce this drawback a possible solution is to connect those field bus segments using interworking devices and a backbone network. A suitable backbone could be an ATM network. An interworking concept based on PROFIBUS/ATM bridges is presented in this paper. Simulations of an example PROFIBUS system were performed in order to study overall system behavior, to evaluate the feasibility of the presented concept and to show its limitations concerning the range of PROFIBUS applications it is suited for.","PeriodicalId":409898,"journal":{"name":"2000 International Zurich Seminar on Broadband Communications. Accessing, Transmission, Networking. Proceedings (Cat. No.00TH8475)","volume":"85 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132690400","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 : 2000-02-15DOI: 10.1109/IZSBC.2000.829233
C. Weinert
We investigate the effects of combined interference noise and Gaussian noise on the BER evaluation. For the case of one interference source and additional Gaussian noise we propose a method to identify the interference noise and to evaluate the correct BER by the method of modified Chernoff bounds.
{"title":"BER evaluation for optical signals with combined EDFA and interference noise","authors":"C. Weinert","doi":"10.1109/IZSBC.2000.829233","DOIUrl":"https://doi.org/10.1109/IZSBC.2000.829233","url":null,"abstract":"We investigate the effects of combined interference noise and Gaussian noise on the BER evaluation. For the case of one interference source and additional Gaussian noise we propose a method to identify the interference noise and to evaluate the correct BER by the method of modified Chernoff bounds.","PeriodicalId":409898,"journal":{"name":"2000 International Zurich Seminar on Broadband Communications. Accessing, Transmission, Networking. Proceedings (Cat. No.00TH8475)","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132877080","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 : 2000-02-15DOI: 10.1109/IZSBC.2000.829230
C. Hong, Chih-Yu Huang
Sequential rotation has the advantage of getting wider circular polarization (CP) bandwidth while each element is of CP design. The proposed structure consists of two cylindrical dielectric resonator (DR) antennas place on a cross-slot in the ground plane of a microstrip line. The measured return loss patterns are presented. For the proposed design, a large CP bandwidth, determined from the 3-dB axial ratio, as high as 5.15%, is obtained. Details of the proposed antenna designs are described, and experimental results of the CP performance are presented and discussed.
{"title":"Circularly polarized dielectric resonator antennas","authors":"C. Hong, Chih-Yu Huang","doi":"10.1109/IZSBC.2000.829230","DOIUrl":"https://doi.org/10.1109/IZSBC.2000.829230","url":null,"abstract":"Sequential rotation has the advantage of getting wider circular polarization (CP) bandwidth while each element is of CP design. The proposed structure consists of two cylindrical dielectric resonator (DR) antennas place on a cross-slot in the ground plane of a microstrip line. The measured return loss patterns are presented. For the proposed design, a large CP bandwidth, determined from the 3-dB axial ratio, as high as 5.15%, is obtained. Details of the proposed antenna designs are described, and experimental results of the CP performance are presented and discussed.","PeriodicalId":409898,"journal":{"name":"2000 International Zurich Seminar on Broadband Communications. Accessing, Transmission, Networking. Proceedings (Cat. No.00TH8475)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130311255","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 : 2000-02-15DOI: 10.1109/IZSBC.2000.829250
Weilin Liu, H. Widmer, J. Aldis, T. Kaltenschnee, Ascom Systec
Data communications with a data rate of several megabits per second over the most popular low-voltage electrical distribution network have been receiving tremendous interest for the last 2 or 3 years. This paper discusses the characteristics of the power line medium, which are relevant for broadband power line communications (PLC) systems. As an example, the concept of the Ascom PLC system, which was tested in a German power-line network for 6 months (March-September, 1999), and measurement results are presented.
{"title":"Nature of power line medium and design aspects for broadband PLC system","authors":"Weilin Liu, H. Widmer, J. Aldis, T. Kaltenschnee, Ascom Systec","doi":"10.1109/IZSBC.2000.829250","DOIUrl":"https://doi.org/10.1109/IZSBC.2000.829250","url":null,"abstract":"Data communications with a data rate of several megabits per second over the most popular low-voltage electrical distribution network have been receiving tremendous interest for the last 2 or 3 years. This paper discusses the characteristics of the power line medium, which are relevant for broadband power line communications (PLC) systems. As an example, the concept of the Ascom PLC system, which was tested in a German power-line network for 6 months (March-September, 1999), and measurement results are presented.","PeriodicalId":409898,"journal":{"name":"2000 International Zurich Seminar on Broadband Communications. Accessing, Transmission, Networking. Proceedings (Cat. No.00TH8475)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130317724","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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