Pub Date : 1996-02-19DOI: 10.1109/ICPWC.1996.494273
A. Alshamali, R. Macario
The TETRA (Trans European Trunked RAdio) is an emerging standard for digital private mobile radio, being prepared by the ETSI (European Telecommunication Standards Institute). /spl pi//4-DQPSK is considered as the modulation scheme, achieving a spectral efficiency of 1.44 bps/Hz. The BER performance of the TETRA modulation in a quasi-synchronous environment, using differential detection, is investigated. Performance degradation due to the differential delay between the received signals is studied. The effect of frequency offset and amplitude imbalances is also discussed.
{"title":"TETRA performance in a quasi-synchronous transmission environment","authors":"A. Alshamali, R. Macario","doi":"10.1109/ICPWC.1996.494273","DOIUrl":"https://doi.org/10.1109/ICPWC.1996.494273","url":null,"abstract":"The TETRA (Trans European Trunked RAdio) is an emerging standard for digital private mobile radio, being prepared by the ETSI (European Telecommunication Standards Institute). /spl pi//4-DQPSK is considered as the modulation scheme, achieving a spectral efficiency of 1.44 bps/Hz. The BER performance of the TETRA modulation in a quasi-synchronous environment, using differential detection, is investigated. Performance degradation due to the differential delay between the received signals is studied. The effect of frequency offset and amplitude imbalances is also discussed.","PeriodicalId":117877,"journal":{"name":"1996 IEEE International Conference on Personal Wireless Communications Proceedings and Exhibition. Future Access","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124442102","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 : 1996-02-19DOI: 10.1109/ICPWC.1996.494282
O. Ucan
In order to improve the bandwidth efficiency and error performance Ucan-decoders, employing a new partial response channel model for M-PSK schemes, are introduced . The Ucan-decoder is composed of k-unit precoders cascaded with a PSK modulator and (1/spl mnplus/D) PRS channel model. In this scheme only k-unit memory of the precoder defines the state number of the decoder and the author denotes k as the "effective memory unit". As an example, Ucan (k=1,2,3) decoders employing (k=1,2,3) effective memory units are investigated for (M=2,4,8) PSK modulations respectively. In an AWGN environment, analytical upper bound curves of the proposed schemes are derived. The error performance of the Ucan-decoders are better than the related systems at all signal to noise ratios. An interesting result is also obtained in a colored noise environment for a correlation coefficient less than zero. It is shown that the Ucan-decoders perform better in colored noise compared to AWGN at all signal to noise ratios.
{"title":"Ucan-decoders in partial response channels","authors":"O. Ucan","doi":"10.1109/ICPWC.1996.494282","DOIUrl":"https://doi.org/10.1109/ICPWC.1996.494282","url":null,"abstract":"In order to improve the bandwidth efficiency and error performance Ucan-decoders, employing a new partial response channel model for M-PSK schemes, are introduced . The Ucan-decoder is composed of k-unit precoders cascaded with a PSK modulator and (1/spl mnplus/D) PRS channel model. In this scheme only k-unit memory of the precoder defines the state number of the decoder and the author denotes k as the \"effective memory unit\". As an example, Ucan (k=1,2,3) decoders employing (k=1,2,3) effective memory units are investigated for (M=2,4,8) PSK modulations respectively. In an AWGN environment, analytical upper bound curves of the proposed schemes are derived. The error performance of the Ucan-decoders are better than the related systems at all signal to noise ratios. An interesting result is also obtained in a colored noise environment for a correlation coefficient less than zero. It is shown that the Ucan-decoders perform better in colored noise compared to AWGN at all signal to noise ratios.","PeriodicalId":117877,"journal":{"name":"1996 IEEE International Conference on Personal Wireless Communications Proceedings and Exhibition. Future Access","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125087102","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 : 1996-02-19DOI: 10.1109/ICPWC.1996.494258
Min-ho Song, Yanghee Choi, Chongsang Kim
Connection rerouting is an important function for handoff processing in connection-oriented mobile communication networks. Several methods have been proposed for the connection rerouting, but they are lacking in generality and flexibility. In this paper, we propose a general model of connection rerouting, based on connection information, which is provided to mobile terminals through connection recording. The generality and flexibility of the proposed method is purely from the connection information.
{"title":"Flexible connection rerouting for connection-oriented mobile communication networks","authors":"Min-ho Song, Yanghee Choi, Chongsang Kim","doi":"10.1109/ICPWC.1996.494258","DOIUrl":"https://doi.org/10.1109/ICPWC.1996.494258","url":null,"abstract":"Connection rerouting is an important function for handoff processing in connection-oriented mobile communication networks. Several methods have been proposed for the connection rerouting, but they are lacking in generality and flexibility. In this paper, we propose a general model of connection rerouting, based on connection information, which is provided to mobile terminals through connection recording. The generality and flexibility of the proposed method is purely from the connection information.","PeriodicalId":117877,"journal":{"name":"1996 IEEE International Conference on Personal Wireless Communications Proceedings and Exhibition. Future Access","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115351486","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 : 1996-02-19DOI: 10.1109/ICPWC.1996.493332
N. Duc
This paper outlines a carrier's view of personal communication services (PCS) in the Australian regulatory and competitive environment. Telstra considers PCS as covering a broad range of both wireless and wireline personal telecommunications services that can be provided using wireless and wireline network technologies. A key objective of PCS developments is to ensure that the end-users fully benefit from personal service mobility, flexibility and control, irrespective of underlying technologies. In particular, end-user service mobility can be provided beyond national boundaries by adopting appropriate mature regional and global standards and associated spectrum bands for wireless PCS.
{"title":"Personal communication services (PCS): a Telstra perspective","authors":"N. Duc","doi":"10.1109/ICPWC.1996.493332","DOIUrl":"https://doi.org/10.1109/ICPWC.1996.493332","url":null,"abstract":"This paper outlines a carrier's view of personal communication services (PCS) in the Australian regulatory and competitive environment. Telstra considers PCS as covering a broad range of both wireless and wireline personal telecommunications services that can be provided using wireless and wireline network technologies. A key objective of PCS developments is to ensure that the end-users fully benefit from personal service mobility, flexibility and control, irrespective of underlying technologies. In particular, end-user service mobility can be provided beyond national boundaries by adopting appropriate mature regional and global standards and associated spectrum bands for wireless PCS.","PeriodicalId":117877,"journal":{"name":"1996 IEEE International Conference on Personal Wireless Communications Proceedings and Exhibition. Future Access","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116171669","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 : 1996-02-19DOI: 10.1109/ICPWC.1996.494264
E. Baccarelli, R. Cusani, S. Galli
A novel adaptive nonlinear coherent receiver for the detection of M-QAM (or M-PSK) modulated data streams transmitted over randomly time-variant frequency-selective fast-fading macrocellular mobile radio channels is presented. Assuming a TDMA system, the main feature of the receiver is to combine the channel-estimation and the data-detection procedures, thus obtaining enhanced channel-tracking capabilities at nearly the same complexity of conventional adaptive receivers for land mobile data-communication.
{"title":"A novel adaptive receiver for combined channel-estimation and data-detection for digital transmission over time- and frequency-dispersive mobile radio channels","authors":"E. Baccarelli, R. Cusani, S. Galli","doi":"10.1109/ICPWC.1996.494264","DOIUrl":"https://doi.org/10.1109/ICPWC.1996.494264","url":null,"abstract":"A novel adaptive nonlinear coherent receiver for the detection of M-QAM (or M-PSK) modulated data streams transmitted over randomly time-variant frequency-selective fast-fading macrocellular mobile radio channels is presented. Assuming a TDMA system, the main feature of the receiver is to combine the channel-estimation and the data-detection procedures, thus obtaining enhanced channel-tracking capabilities at nearly the same complexity of conventional adaptive receivers for land mobile data-communication.","PeriodicalId":117877,"journal":{"name":"1996 IEEE International Conference on Personal Wireless Communications Proceedings and Exhibition. Future Access","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129824563","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 : 1996-02-19DOI: 10.1109/ICPWC.1996.493326
M. Levin, B. Epstein, F. Furcajg, D. Dilmony
In many developing countries, there is both a tremendous demand for the provision of communication services and a lack of infrastructure which may be used to connect the potential users to the network. Developing the infrastructure is extremely expensive and time consuming. The wireless local loop system is a natural solution since it provides the infrastructure in a fraction of the time at a fraction of the cost. Many of the wireless systems on the market today are based on the TDMA concept. We examine the performance of several different allocation algorithms including a semi-fixed algorithm and transfer algorithms.
{"title":"Capacity maximization in TDMA based WLL systems using multi-user units","authors":"M. Levin, B. Epstein, F. Furcajg, D. Dilmony","doi":"10.1109/ICPWC.1996.493326","DOIUrl":"https://doi.org/10.1109/ICPWC.1996.493326","url":null,"abstract":"In many developing countries, there is both a tremendous demand for the provision of communication services and a lack of infrastructure which may be used to connect the potential users to the network. Developing the infrastructure is extremely expensive and time consuming. The wireless local loop system is a natural solution since it provides the infrastructure in a fraction of the time at a fraction of the cost. Many of the wireless systems on the market today are based on the TDMA concept. We examine the performance of several different allocation algorithms including a semi-fixed algorithm and transfer algorithms.","PeriodicalId":117877,"journal":{"name":"1996 IEEE International Conference on Personal Wireless Communications Proceedings and Exhibition. Future Access","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126792833","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 : 1996-02-19DOI: 10.1109/ICPWC.1996.494291
H. Bogucka
The possibility of applying the multicarrier code division multiple access (MC-CDMA) technique in the 3rd generation mobile cellular communication system is analyzed. The key features of such a system are described and the basic problems of transmission and reception of the MC-CDMA signals are discussed. The MC-CDMA system can be regarded as the conventional DS-CDMA system in which nonbinary, complex PN sequences have been applied. All the features and the well known advantages of DS-CDMA allow one to consider this technique as a potential solution for users multiplexing and modulation in the future Universal Mobile Telecommunication System.
{"title":"Transmission and reception of the multicarrier CDMA signals in the 3rd generation mobile communication system","authors":"H. Bogucka","doi":"10.1109/ICPWC.1996.494291","DOIUrl":"https://doi.org/10.1109/ICPWC.1996.494291","url":null,"abstract":"The possibility of applying the multicarrier code division multiple access (MC-CDMA) technique in the 3rd generation mobile cellular communication system is analyzed. The key features of such a system are described and the basic problems of transmission and reception of the MC-CDMA signals are discussed. The MC-CDMA system can be regarded as the conventional DS-CDMA system in which nonbinary, complex PN sequences have been applied. All the features and the well known advantages of DS-CDMA allow one to consider this technique as a potential solution for users multiplexing and modulation in the future Universal Mobile Telecommunication System.","PeriodicalId":117877,"journal":{"name":"1996 IEEE International Conference on Personal Wireless Communications Proceedings and Exhibition. Future Access","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116297981","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 : 1996-02-19DOI: 10.1109/ICPWC.1996.494279
M. Srinivasa Rao, M. Govindarajan, R. Lal
We have developed a low-cost RF spectrum analyser for university laboratories. The analyser works at up to 50 MHz, with a resolution bandwidth of 75 kHz, a sensitivity of -123 dBm/Hz, and a dynamic range of 75 dB. The frequency range can be extended up to 500 MHz in 50 MHz sweep units.
{"title":"Low-cost RF spectrum analyser","authors":"M. Srinivasa Rao, M. Govindarajan, R. Lal","doi":"10.1109/ICPWC.1996.494279","DOIUrl":"https://doi.org/10.1109/ICPWC.1996.494279","url":null,"abstract":"We have developed a low-cost RF spectrum analyser for university laboratories. The analyser works at up to 50 MHz, with a resolution bandwidth of 75 kHz, a sensitivity of -123 dBm/Hz, and a dynamic range of 75 dB. The frequency range can be extended up to 500 MHz in 50 MHz sweep units.","PeriodicalId":117877,"journal":{"name":"1996 IEEE International Conference on Personal Wireless Communications Proceedings and Exhibition. Future Access","volume":"2012 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114800231","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 : 1996-02-19DOI: 10.1109/ICPWC.1996.493328
K. Basu, Y. Zhu, M. Lakshminarayan
Since cellular system was introduced in early 1980s, the capacity was always one of the major areas to improve, investigate and research. The application of wireless as local loop access technology increased that demand on access capacity considerably due to very high traffic rate of the local loop customers. The microcell can be used as a capacity solution for the local loop application. A microcell underlay in an exiting wireless access network is considered as a strategy to achieve a high system performance and a broad coverage. High traffic areas are covered by the underlaying microcells while the macrocells cover the low traffic areas and provide an overflow group of channels for clusters of microcells. This paper is restricted to the considerations for a fixed wireless access network with a microcell underlay. The main objective is to evaluate the system capacity gains. The issues of RF planning and modelling are not addressed. A queueing model which captured the main traffic characteristics of the network with a microcell underlay is formulated from which we give an optimization algorithm to evaluate the system capacity gains of the network due to the microcell underlay. A study of an urban network shows that the system capacity can be significantly increased by deploying the microcell underlay.
{"title":"Microcell technology solution for wireless local loop applications","authors":"K. Basu, Y. Zhu, M. Lakshminarayan","doi":"10.1109/ICPWC.1996.493328","DOIUrl":"https://doi.org/10.1109/ICPWC.1996.493328","url":null,"abstract":"Since cellular system was introduced in early 1980s, the capacity was always one of the major areas to improve, investigate and research. The application of wireless as local loop access technology increased that demand on access capacity considerably due to very high traffic rate of the local loop customers. The microcell can be used as a capacity solution for the local loop application. A microcell underlay in an exiting wireless access network is considered as a strategy to achieve a high system performance and a broad coverage. High traffic areas are covered by the underlaying microcells while the macrocells cover the low traffic areas and provide an overflow group of channels for clusters of microcells. This paper is restricted to the considerations for a fixed wireless access network with a microcell underlay. The main objective is to evaluate the system capacity gains. The issues of RF planning and modelling are not addressed. A queueing model which captured the main traffic characteristics of the network with a microcell underlay is formulated from which we give an optimization algorithm to evaluate the system capacity gains of the network due to the microcell underlay. A study of an urban network shows that the system capacity can be significantly increased by deploying the microcell underlay.","PeriodicalId":117877,"journal":{"name":"1996 IEEE International Conference on Personal Wireless Communications Proceedings and Exhibition. Future Access","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124131066","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 : 1996-02-19DOI: 10.1109/ICPWC.1996.493325
J. Henry, M. Kori
This paper examines the suitability of DECT (Digital European Cordless Telecommunication Standards) standard for local loop in rural applications. The features and significance of DECT standard and ifs applicability for local loop applications in rural areas have been highlighted. A DECT-WLL reference model by combining DECT technology with D-MARR systems to provide a cost-effective rural radio local loop solution namely Wireless Rural Radio Local Loop (WR/sup 2/L/sup 2/) is reported. The proposed model of the radio link and range estimation are explained.
本文探讨了DECT (Digital European Cordless Telecommunication Standards，数字欧洲无线通信标准)标准在农村本地环路应用中的适用性。强调了DECT标准的特点、意义及其在农村局部环路应用中的适用性。报告了一种将DECT技术与D-MARR系统相结合的DECT- wll参考模型，该模型提供了一种具有成本效益的农村无线电本地环路解决方案，即无线农村无线电本地环路(WR/sup 2/L/sup 2/)。对所提出的无线电链路模型和距离估计进行了说明。
{"title":"DECT based rural radio local loop for developing countries","authors":"J. Henry, M. Kori","doi":"10.1109/ICPWC.1996.493325","DOIUrl":"https://doi.org/10.1109/ICPWC.1996.493325","url":null,"abstract":"This paper examines the suitability of DECT (Digital European Cordless Telecommunication Standards) standard for local loop in rural applications. The features and significance of DECT standard and ifs applicability for local loop applications in rural areas have been highlighted. A DECT-WLL reference model by combining DECT technology with D-MARR systems to provide a cost-effective rural radio local loop solution namely Wireless Rural Radio Local Loop (WR/sup 2/L/sup 2/) is reported. The proposed model of the radio link and range estimation are explained.","PeriodicalId":117877,"journal":{"name":"1996 IEEE International Conference on Personal Wireless Communications Proceedings and Exhibition. Future Access","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128091355","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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