Pub Date : 2000-09-24DOI: 10.1109/VETECF.2000.886866
D. Molkdar, T. Quirke
In this paper various techniques, hereafter referred to as deployment techniques, to provide capacity and coverage inside buildings for GSM cellular mobile telephony system are described. The techniques described are dedicated or undedicated, indicating a system specifically designed for in-building coverage or coverage is achieved by using the macro- or micro-layers, respectively. In addition, the criteria that should be considered in the selection process of a particular deployment technique are described. Finally, the deployment techniques described are graded based on the criteria defined so that a deployment technique that satisfies a specific set of criteria can be selected.
{"title":"Techniques to provide coverage and capacity in GSM picocellular environments","authors":"D. Molkdar, T. Quirke","doi":"10.1109/VETECF.2000.886866","DOIUrl":"https://doi.org/10.1109/VETECF.2000.886866","url":null,"abstract":"In this paper various techniques, hereafter referred to as deployment techniques, to provide capacity and coverage inside buildings for GSM cellular mobile telephony system are described. The techniques described are dedicated or undedicated, indicating a system specifically designed for in-building coverage or coverage is achieved by using the macro- or micro-layers, respectively. In addition, the criteria that should be considered in the selection process of a particular deployment technique are described. Finally, the deployment techniques described are graded based on the criteria defined so that a deployment technique that satisfies a specific set of criteria can be selected.","PeriodicalId":186198,"journal":{"name":"Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128181904","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 : 2000-09-24DOI: 10.1109/VETECF.2000.886276
F. Graziosi, F. Santucci, V. Di Claudio, F. Mecella
We report on investigations of indoor cellular networks for wireless access in a corporate environment. The work is an evolution of that reported by Di Claudio, Graziosi, Luciani, Mecella and Santucci(see Proc. of IEEE VTC2000 Spring, Tokyo, p.1742-46, 2000), where the reference scenario of an integrated private/public environment was presented and preliminary performance results were obtained for a single floor building with simulcast coverage. While retaining the assumption of spectrum sharing between the outdoor cellular and the indoor system, in this paper the more general scenario of a multi-floor building is considered. In this context frequency reuse is required to achieve adequate capacities in large buildings and our investigation aims at evaluating the impact of an unwise choice of the carriers to be allocated to the indoor system. Performance results are reported in terms of performance degradation in the outdoor system due to the presence of the indoor coverage.
我们报告了在企业环境中用于无线接入的室内蜂窝网络的调查。这项工作是Di Claudio, Graziosi, Luciani, Mecella和Santucci的报告的发展(参见IEEE VTC2000 Spring, Tokyo, p.1742-46, 2000)，其中提出了综合私人/公共环境的参考场景，并获得了具有同步广播覆盖的单层建筑的初步性能结果。在保留室外蜂窝系统和室内系统频谱共享假设的同时，本文考虑了多层建筑的更一般场景。在这种情况下，为了在大型建筑物中获得足够的容量，需要频率重复使用，我们的调查旨在评估分配给室内系统的载波的不明智选择的影响。由于室内覆盖的存在，性能结果报告了室外系统的性能下降。
{"title":"Radio link performance and traffic capacity of indoor wireless systems integrated with outdoor cellular","authors":"F. Graziosi, F. Santucci, V. Di Claudio, F. Mecella","doi":"10.1109/VETECF.2000.886276","DOIUrl":"https://doi.org/10.1109/VETECF.2000.886276","url":null,"abstract":"We report on investigations of indoor cellular networks for wireless access in a corporate environment. The work is an evolution of that reported by Di Claudio, Graziosi, Luciani, Mecella and Santucci(see Proc. of IEEE VTC2000 Spring, Tokyo, p.1742-46, 2000), where the reference scenario of an integrated private/public environment was presented and preliminary performance results were obtained for a single floor building with simulcast coverage. While retaining the assumption of spectrum sharing between the outdoor cellular and the indoor system, in this paper the more general scenario of a multi-floor building is considered. In this context frequency reuse is required to achieve adequate capacities in large buildings and our investigation aims at evaluating the impact of an unwise choice of the carriers to be allocated to the indoor system. Performance results are reported in terms of performance degradation in the outdoor system due to the presence of the indoor coverage.","PeriodicalId":186198,"journal":{"name":"Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128182284","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 : 2000-09-24DOI: 10.1109/VETECF.2000.886646
K. Cho, Y. Takatori, K. Nishimori, T. Hori
Space-division-multiple-access (SDMA) is a promising candidate for improving the channel capacity in future wireless communication systems. Since the discrimination performance of the user in the spatial domain depends on the array arrangement, an optimum element arrangement for SDMA should be defined. This paper proposes a formula to determine the optimum element arrangement of smart antennas for SDMA systems. The formula is based on spatial correlation. The dependency of the output SINR performance on element arrangements is also evaluated by computer simulation.
{"title":"Optimum element arrangement of adaptive base station antennas for SDMA in circular cell","authors":"K. Cho, Y. Takatori, K. Nishimori, T. Hori","doi":"10.1109/VETECF.2000.886646","DOIUrl":"https://doi.org/10.1109/VETECF.2000.886646","url":null,"abstract":"Space-division-multiple-access (SDMA) is a promising candidate for improving the channel capacity in future wireless communication systems. Since the discrimination performance of the user in the spatial domain depends on the array arrangement, an optimum element arrangement for SDMA should be defined. This paper proposes a formula to determine the optimum element arrangement of smart antennas for SDMA systems. The formula is based on spatial correlation. The dependency of the output SINR performance on element arrangements is also evaluated by computer simulation.","PeriodicalId":186198,"journal":{"name":"Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121610553","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 : 2000-09-24DOI: 10.1109/VETECF.2000.887078
M. Mahmoudi, E. Sousa
A CDMA cellular scheme that dynamically adapts the cells to the spatial load distribution is proposed. The scheme maximizes the network capacity for a given number of base stations, for any distribution of the mobile users. It combines power control, base station assignment and adaptive sectorization efficiently, and can be easily integrated into the already deployed CDMA systems. Simulation results show that our relatively low complexity approach, achieves a performance quite close to that of an optimal beamforming scheme under uniform and non-uniform load scenarios.
{"title":"Joint power control, base station assignment and sectorization for CDMA cellular systems","authors":"M. Mahmoudi, E. Sousa","doi":"10.1109/VETECF.2000.887078","DOIUrl":"https://doi.org/10.1109/VETECF.2000.887078","url":null,"abstract":"A CDMA cellular scheme that dynamically adapts the cells to the spatial load distribution is proposed. The scheme maximizes the network capacity for a given number of base stations, for any distribution of the mobile users. It combines power control, base station assignment and adaptive sectorization efficiently, and can be easily integrated into the already deployed CDMA systems. Simulation results show that our relatively low complexity approach, achieves a performance quite close to that of an optimal beamforming scheme under uniform and non-uniform load scenarios.","PeriodicalId":186198,"journal":{"name":"Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115973347","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 : 2000-09-24DOI: 10.1109/VETECF.2000.886313
D.E. Fague, S. Nandipaku, N. Nørholm, M. Westergaard
The performance of a novel direct conversion radio for GSM tri-band and GPRS applications is evaluated. An overview of the architecture is presented along with the results of an analysis of the radio performance. The advantages of the architecture are discussed, particularly with respect to the frequency plan and DC offset reduction. Measured receiver performance is presented for sensitivity in GSM and DCS1800 bands, blocking, AM detection, and adjacent and co-channel interference performance. Measured performance of the novel transmitter is also presented. Measured performance of a fractional-N synthesizer is presented for phase noise and lock time, demonstrating that it is suitable for GPRS applications.
{"title":"Performance evaluation of a direct conversion radio for tri-band GSM and GPRS applications","authors":"D.E. Fague, S. Nandipaku, N. Nørholm, M. Westergaard","doi":"10.1109/VETECF.2000.886313","DOIUrl":"https://doi.org/10.1109/VETECF.2000.886313","url":null,"abstract":"The performance of a novel direct conversion radio for GSM tri-band and GPRS applications is evaluated. An overview of the architecture is presented along with the results of an analysis of the radio performance. The advantages of the architecture are discussed, particularly with respect to the frequency plan and DC offset reduction. Measured receiver performance is presented for sensitivity in GSM and DCS1800 bands, blocking, AM detection, and adjacent and co-channel interference performance. Measured performance of the novel transmitter is also presented. Measured performance of a fractional-N synthesizer is presented for phase noise and lock time, demonstrating that it is suitable for GPRS applications.","PeriodicalId":186198,"journal":{"name":"Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132042224","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 : 2000-09-24DOI: 10.1109/VETECF.2000.886806
D. Molkdar, W. Featherstone
This paper provides-under a simulation environment-the downlink system level performance of EGPRS Phase I in GSM interference limited macro-cellular environments. Various scenarios are investigated by considering the throughput and delay statistics at the system level and user level. An interference limited macro-cellular environment; populated with mobiles operating with perfect receiver under the Tu50-NoFH radio condition and receiving e-mail, is considered for two cell re-use pattern scenarios; 4/spl times/3 and 1/spl times/3 (frequency hopping). The main input parameters varied to evaluate the performance under the above scenarios include operating BLER and the number of time slots allocated to EGPRS on a GSM carrier. The results represent the perfect link adaptation (LA) case with no incremental redundancy (IR).
{"title":"System level performance evaluation of EGPRS in GSM macro-cell environments","authors":"D. Molkdar, W. Featherstone","doi":"10.1109/VETECF.2000.886806","DOIUrl":"https://doi.org/10.1109/VETECF.2000.886806","url":null,"abstract":"This paper provides-under a simulation environment-the downlink system level performance of EGPRS Phase I in GSM interference limited macro-cellular environments. Various scenarios are investigated by considering the throughput and delay statistics at the system level and user level. An interference limited macro-cellular environment; populated with mobiles operating with perfect receiver under the Tu50-NoFH radio condition and receiving e-mail, is considered for two cell re-use pattern scenarios; 4/spl times/3 and 1/spl times/3 (frequency hopping). The main input parameters varied to evaluate the performance under the above scenarios include operating BLER and the number of time slots allocated to EGPRS on a GSM carrier. The results represent the perfect link adaptation (LA) case with no incremental redundancy (IR).","PeriodicalId":186198,"journal":{"name":"Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134402620","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 : 2000-09-24DOI: 10.1109/VETECF.2000.886305
A. Elezabi, A. Duel-Hallen
Among the advantages of subtractive interference cancellation (IC), or multistage detectors for CDMA (code-division multiple-access) systems is that they facilitate feedback between the multiuser detection and decoding stages in a CDMA receiver. We propose modified branch metrics for the single-user Viterbi decoders used in conjunction with two-stage detectors for CDMA systems with long (random) spreading sequences. The modifications are based on modeling the residual multiple-access interference (RMAI) as conditionally Gaussian with time-dependent variance where the conditioning is on the time-varying user cross-correlations. A novel estimate of the variance of the total RMAI is presented, and put to use in the modified branch metrics. Significant performance gains are demonstrated over the Euclidean branch metric of the standard Viterbi decoder, and further improvements are discussed.
{"title":"Improved single-user decoder metrics for two-stage detectors in DS-CDMA","authors":"A. Elezabi, A. Duel-Hallen","doi":"10.1109/VETECF.2000.886305","DOIUrl":"https://doi.org/10.1109/VETECF.2000.886305","url":null,"abstract":"Among the advantages of subtractive interference cancellation (IC), or multistage detectors for CDMA (code-division multiple-access) systems is that they facilitate feedback between the multiuser detection and decoding stages in a CDMA receiver. We propose modified branch metrics for the single-user Viterbi decoders used in conjunction with two-stage detectors for CDMA systems with long (random) spreading sequences. The modifications are based on modeling the residual multiple-access interference (RMAI) as conditionally Gaussian with time-dependent variance where the conditioning is on the time-varying user cross-correlations. A novel estimate of the variance of the total RMAI is presented, and put to use in the modified branch metrics. Significant performance gains are demonstrated over the Euclidean branch metric of the standard Viterbi decoder, and further improvements are discussed.","PeriodicalId":186198,"journal":{"name":"Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133272629","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 : 2000-09-24DOI: 10.1109/VETECF.2000.887097
I. Cuiñas, M. S. Varela, M. Sanchez
Wide-band indoor radio channel measurements have been performed at 5.8 GHz, in order to be used as basis in the deploying of BRAN (broadband radio access networks), and results are given. Both narrow- and wide-band ray-tracing simulations were carried out, comparing their results with the measured ones. Building material characterization at 5.8 GHz was performed by the free-space measurement system, and results are given and used to compute the simulations.
{"title":"Wide band indoor radio channel measurements at 5.8 GHz","authors":"I. Cuiñas, M. S. Varela, M. Sanchez","doi":"10.1109/VETECF.2000.887097","DOIUrl":"https://doi.org/10.1109/VETECF.2000.887097","url":null,"abstract":"Wide-band indoor radio channel measurements have been performed at 5.8 GHz, in order to be used as basis in the deploying of BRAN (broadband radio access networks), and results are given. Both narrow- and wide-band ray-tracing simulations were carried out, comparing their results with the measured ones. Building material characterization at 5.8 GHz was performed by the free-space measurement system, and results are given and used to compute the simulations.","PeriodicalId":186198,"journal":{"name":"Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132258977","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 : 2000-09-24DOI: 10.1109/VETECF.2000.886793
C. Yuen, K. Tsang
A novel high channel efficiency transceiver based on a fast acquisition frequency synthesizer has been designed. The direct access frequency synthesis technique is applied and a simple memory look-up table is incorporated to expedite channel acquisition. The technique simplifies the frequency control process in the transceiver and thus reduces the channel switching time. As a result, the channel efficiency is improved. The proposed transceiver is ideal for frequency hopping mobile communication applications.
{"title":"A high channel efficiency transceiver based on direct access frequency synthesis technique","authors":"C. Yuen, K. Tsang","doi":"10.1109/VETECF.2000.886793","DOIUrl":"https://doi.org/10.1109/VETECF.2000.886793","url":null,"abstract":"A novel high channel efficiency transceiver based on a fast acquisition frequency synthesizer has been designed. The direct access frequency synthesis technique is applied and a simple memory look-up table is incorporated to expedite channel acquisition. The technique simplifies the frequency control process in the transceiver and thus reduces the channel switching time. As a result, the channel efficiency is improved. The proposed transceiver is ideal for frequency hopping mobile communication applications.","PeriodicalId":186198,"journal":{"name":"Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128871982","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 : 2000-09-24DOI: 10.1109/VETECF.2000.886800
H. Bento Pinto, J. R. Gaspar da Silva, A. Rodrigues
This document presents the most significant uplink results obtained by a system level (SL) simulator based upon the specifications presented in the ETSI (UMTS 30.03-v320) publication and on the link level results from ETSI, "The ETSI UMTS Terrestrial Radio Access ITU-R RTT Candidate Submission". After describing the basis in which the simulator was built the modelling of several items associated to a SL simulator of UMTS (Universal Mobile Telecommunication System) W-CDMA systems operating in the FDD (frequency division duplex) mode is introduced. For single services the simulator results can be compared to those presented in the second publication, but service mix results are also presented and for those there are no results available for comparison.
{"title":"Uplink capacity of the WCDMA FDD mode in UMTS networks for mixed services","authors":"H. Bento Pinto, J. R. Gaspar da Silva, A. Rodrigues","doi":"10.1109/VETECF.2000.886800","DOIUrl":"https://doi.org/10.1109/VETECF.2000.886800","url":null,"abstract":"This document presents the most significant uplink results obtained by a system level (SL) simulator based upon the specifications presented in the ETSI (UMTS 30.03-v320) publication and on the link level results from ETSI, \"The ETSI UMTS Terrestrial Radio Access ITU-R RTT Candidate Submission\". After describing the basis in which the simulator was built the modelling of several items associated to a SL simulator of UMTS (Universal Mobile Telecommunication System) W-CDMA systems operating in the FDD (frequency division duplex) mode is introduced. For single services the simulator results can be compared to those presented in the second publication, but service mix results are also presented and for those there are no results available for comparison.","PeriodicalId":186198,"journal":{"name":"Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134467171","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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