Pub Date : 1997-09-01DOI: 10.1109/PIMRC.1997.631139
A. Zahedi, K. Pahlavan
The capacity of a carrier sense multiple access (CSMA) wireless LAN with voice and data services using the TCP/IP protocol is analyzed to obtain a lower bound for the capacity of the 802.11 wireless networks with voice and data services. The voice traffic is given higher priority over the data traffic to accommodate the delay requirement for an acceptable quality of service (QoS). This is implemented by assigning the TCP protocol for the data and the UDP protocol for the voice. The relationship between the data throughput and the number of the voice users supported in this environment is analyzed. The improved multi-band excitation (IMBE) voice encoding technique, proposed for the APCO-25 and used in the INMARSAT-M and AUSSAT mobile satellite communications, is adopted to provide a low transmission rate with an acceptable quality.
{"title":"Voice and data integration on TCP/IP wireless networks","authors":"A. Zahedi, K. Pahlavan","doi":"10.1109/PIMRC.1997.631139","DOIUrl":"https://doi.org/10.1109/PIMRC.1997.631139","url":null,"abstract":"The capacity of a carrier sense multiple access (CSMA) wireless LAN with voice and data services using the TCP/IP protocol is analyzed to obtain a lower bound for the capacity of the 802.11 wireless networks with voice and data services. The voice traffic is given higher priority over the data traffic to accommodate the delay requirement for an acceptable quality of service (QoS). This is implemented by assigning the TCP protocol for the data and the UDP protocol for the voice. The relationship between the data throughput and the number of the voice users supported in this environment is analyzed. The improved multi-band excitation (IMBE) voice encoding technique, proposed for the APCO-25 and used in the INMARSAT-M and AUSSAT mobile satellite communications, is adopted to provide a low transmission rate with an acceptable quality.","PeriodicalId":362340,"journal":{"name":"Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127103387","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 : 1997-09-01DOI: 10.1109/PIMRC.1997.624376
H. Matsutani, Y. Sanada, M. Nakagawa
A new intracell orthogonalization technique for a code division multiple access (CDMA) wireless local communication system is posed. On the forward link of the system, it is necessary to achieve high bit rate transmission and to reduce the complexity of the receiving terminal. To meet these two requirements, cyclically shifted spreading sequences are utilized. However, it is necessary to orthogonalize the multiple signals since these sequences are cross-correlated. One way of achieving orthogonalization is pre-decorrelation. However, the orthogonality does not clearly appear in a multipath fading channel because of the interchip interference caused by multipath. Therefore in this paper, pre-decorrelation is combined with multicarrier modulation. The results obtained through computer simulation show that the proposed technique can achieve orthogonality in a multipath fading channel. Also the proposed technique makes efficient forward link power control possible, and reduces intercell interference.
{"title":"A forward link intracell orthogonalization technique using multicarrier pre-decorrelation for CDMA wireless local communication system","authors":"H. Matsutani, Y. Sanada, M. Nakagawa","doi":"10.1109/PIMRC.1997.624376","DOIUrl":"https://doi.org/10.1109/PIMRC.1997.624376","url":null,"abstract":"A new intracell orthogonalization technique for a code division multiple access (CDMA) wireless local communication system is posed. On the forward link of the system, it is necessary to achieve high bit rate transmission and to reduce the complexity of the receiving terminal. To meet these two requirements, cyclically shifted spreading sequences are utilized. However, it is necessary to orthogonalize the multiple signals since these sequences are cross-correlated. One way of achieving orthogonalization is pre-decorrelation. However, the orthogonality does not clearly appear in a multipath fading channel because of the interchip interference caused by multipath. Therefore in this paper, pre-decorrelation is combined with multicarrier modulation. The results obtained through computer simulation show that the proposed technique can achieve orthogonality in a multipath fading channel. Also the proposed technique makes efficient forward link power control possible, and reduces intercell interference.","PeriodicalId":362340,"journal":{"name":"Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128385339","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 : 1997-09-01DOI: 10.1109/PIMRC.1997.631101
I. Yoshii, R. Kohno
Pieter van Rooyen and Kohno proposed a combination receiver of adaptive arrays and MRC diversity, named a double spatial and temporal filter (DSTF) receiver. Each of the diversity branches consist of an array antenna. Each of the branches are separated spatially and independent. This assumption differs from the plane waves model. This paper discusses a method of combining an array antenna and a diversity antenna in plane waves model.
Pieter van Rooyen和Kohno提出了一种自适应阵列和MRC分集的组合接收机，称为双时空滤波器(double spatial and temporal filter, DSTF)接收机。每个分集分支由一个阵列天线组成。每个分支在空间上是分开的，独立的。这个假设与平面波模型不同。本文讨论了平面波模型中阵列天线与分集天线相结合的方法。
{"title":"Adaptive directional receiver with different antenna spacing for CDMA","authors":"I. Yoshii, R. Kohno","doi":"10.1109/PIMRC.1997.631101","DOIUrl":"https://doi.org/10.1109/PIMRC.1997.631101","url":null,"abstract":"Pieter van Rooyen and Kohno proposed a combination receiver of adaptive arrays and MRC diversity, named a double spatial and temporal filter (DSTF) receiver. Each of the diversity branches consist of an array antenna. Each of the branches are separated spatially and independent. This assumption differs from the plane waves model. This paper discusses a method of combining an array antenna and a diversity antenna in plane waves model.","PeriodicalId":362340,"journal":{"name":"Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134404783","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 : 1997-09-01DOI: 10.1109/PIMRC.1997.627025
R. Petrovic, A. Molisch
We analyze how multipath effects namely errors due to channel-induced intersymbol interference, can be reduced by frequency-discriminator detection for FSK. We first introduce a new mathematical technique that can be considered as generalization of FM noise-click theory, and thus allows insights into the error mechanisms. Building on those insights, we propose and verify that a nonlinear frequency discriminator can achieve zero error floor for pure binary FSK and drastically reduced the error floor for filtered FSK by clipping off the ISI-induced FM clicks. The stronger the filtering (before or after the frequency discriminator), the more the beneficial effect of the nonlinearity is reduced. Finally, we show that increasing the modulation index decreases the error floor, especially in the presence of frequency shifts. Our results suggest the design of improved receivers that are less sensitive to ISI.
{"title":"Reduction of multipath effects for FSK with frequency-discriminator detection","authors":"R. Petrovic, A. Molisch","doi":"10.1109/PIMRC.1997.627025","DOIUrl":"https://doi.org/10.1109/PIMRC.1997.627025","url":null,"abstract":"We analyze how multipath effects namely errors due to channel-induced intersymbol interference, can be reduced by frequency-discriminator detection for FSK. We first introduce a new mathematical technique that can be considered as generalization of FM noise-click theory, and thus allows insights into the error mechanisms. Building on those insights, we propose and verify that a nonlinear frequency discriminator can achieve zero error floor for pure binary FSK and drastically reduced the error floor for filtered FSK by clipping off the ISI-induced FM clicks. The stronger the filtering (before or after the frequency discriminator), the more the beneficial effect of the nonlinearity is reduced. Finally, we show that increasing the modulation index decreases the error floor, especially in the presence of frequency shifts. Our results suggest the design of improved receivers that are less sensitive to ISI.","PeriodicalId":362340,"journal":{"name":"Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134388637","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 : 1997-09-01DOI: 10.1109/PIMRC.1997.631074
J. Harmer
The ACTS On The Move project is investigating mobile multimedia applications and services for the Universal Mobile Telecommunications System (UMTS). A Mobile Application Support Environment (MASE) is being designed and implemented. This middleware enables personalised access to multimedia applications which will be available to users irrespective of the mobile hardware, user location and wireless network characteristics. A Mobile Application Programming Interface (Mobile-API) is being developed which provides access to MASE facilities. The Mobile-API is being used to develop new, mobile aware, multimedia applications. MASE functionality is being demonstrated through the implementation of a mobile aware multimedia business information system which forms the basis of a series of field trials. The project began in September 1995 and lasts for three years. This paper introduces the background and rationale behind the On The Move project. An overview of MASE functionality and the Mobile-API is given. The mobile aware business information system "Infomotion" and its evolution through the field trial programme is described.
移动中的ACTS项目正在为通用移动通信系统(UMTS)调查移动多媒体应用和服务。一个移动应用支持环境(MASE)正在被设计和实现。这种中间件使用户能够访问个性化的多媒体应用程序，而不受移动硬件、用户位置和无线网络特性的影响。一个移动应用程序编程接口(Mobile- api)正在开发中，它提供了对MASE设施的访问。mobile - api正被用于开发新的、移动感知的多媒体应用程序。MASE的功能正在通过移动感知多媒体业务信息系统的实施来展示，该系统构成了一系列实地试验的基础。该项目于1995年9月开始，为期三年。本文介绍了On the Move项目的背景和基本原理。给出了MASE功能和Mobile-API的概述。描述了移动感知商业信息系统“information”及其通过现场试验方案的演变。
{"title":"Mobile aware multimedia applications for UMTS: the ACTS On The Move project","authors":"J. Harmer","doi":"10.1109/PIMRC.1997.631074","DOIUrl":"https://doi.org/10.1109/PIMRC.1997.631074","url":null,"abstract":"The ACTS On The Move project is investigating mobile multimedia applications and services for the Universal Mobile Telecommunications System (UMTS). A Mobile Application Support Environment (MASE) is being designed and implemented. This middleware enables personalised access to multimedia applications which will be available to users irrespective of the mobile hardware, user location and wireless network characteristics. A Mobile Application Programming Interface (Mobile-API) is being developed which provides access to MASE facilities. The Mobile-API is being used to develop new, mobile aware, multimedia applications. MASE functionality is being demonstrated through the implementation of a mobile aware multimedia business information system which forms the basis of a series of field trials. The project began in September 1995 and lasts for three years. This paper introduces the background and rationale behind the On The Move project. An overview of MASE functionality and the Mobile-API is given. The mobile aware business information system \"Infomotion\" and its evolution through the field trial programme is described.","PeriodicalId":362340,"journal":{"name":"Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97","volume":"147 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134473898","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 : 1997-09-01DOI: 10.1109/PIMRC.1997.624401
M. Hashimoto, S. Sampei, N. Morinaga
This paper proposes a direct sequence/code division multiple access (DS/CDMA) cellular system using channel activation and soft power control techniques to increase both the forward and reverse link capacities. To equivalently control the received signal to interference and noise power ratio (CINR) to be constant, the proposed system employs a channel activation technique in which higher channel coding gain and small processing gain are employed with a shorter burst length during higher CINR period, and a lower channel coding gain and larger processing gain are employed with longer burst during lower CINR. Moreover, the proposed system employs a soft power control technique to enhance the advantages of the channel activation technique. Computer simulation confirms that the proposed system can achieve a higher system capacity with a smaller soft hand-off margin and a smaller average transmitter power.
{"title":"Forward and reverse link capacity enhancement of DS/CDMA cellular system using channel activation and soft power control techniques","authors":"M. Hashimoto, S. Sampei, N. Morinaga","doi":"10.1109/PIMRC.1997.624401","DOIUrl":"https://doi.org/10.1109/PIMRC.1997.624401","url":null,"abstract":"This paper proposes a direct sequence/code division multiple access (DS/CDMA) cellular system using channel activation and soft power control techniques to increase both the forward and reverse link capacities. To equivalently control the received signal to interference and noise power ratio (CINR) to be constant, the proposed system employs a channel activation technique in which higher channel coding gain and small processing gain are employed with a shorter burst length during higher CINR period, and a lower channel coding gain and larger processing gain are employed with longer burst during lower CINR. Moreover, the proposed system employs a soft power control technique to enhance the advantages of the channel activation technique. Computer simulation confirms that the proposed system can achieve a higher system capacity with a smaller soft hand-off margin and a smaller average transmitter power.","PeriodicalId":362340,"journal":{"name":"Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131701409","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 : 1997-09-01DOI: 10.1109/PIMRC.1997.631104
Detlef Mansel, Andreas Müller, C. Plenge
The DECT (Digital Enhanced Telecommunication System) is considered to be one of the prime candidates for the wireless local loop (WLL) and personal communication systems (PCS) as well. To test the DECT under real life conditions one of the new network operators, namely o.tel.o Kommunikationssysteme GmbH (former RWE Telliance GmbH), has set up a large field-trial system in Gelsenkirchen, Germany. A key issue is the spectrum needed for DECT as a WLL system, as the WLL system has to share the 20 MHz of DECT spectrum with all private systems, e.g. cordless phones and cordless private branch exchanges. A special "hot spot" test campaign within the Gelsenkirchen field-trial system is described. The public WLL and PCS systems were heavily loaded with traffic. In addition 35 private DECT telephones which generated a traffic load of approximately one Erlang each were set up in the hot spot area. The performance of the private and the public systems were measured. Test results show a very good performance of the private system and a good performance of the public system under this "hot spot" condition.
DECT(数字增强通信系统)被认为是无线本地环路(WLL)和个人通信系统(PCS)的主要候选者之一。为了在现实生活条件下测试DECT，一家新的网络运营商，即o. telo Kommunikationssysteme GmbH(原RWE Telliance GmbH)，已经在德国Gelsenkirchen建立了一个大型的现场试验系统。一个关键问题是DECT作为WLL系统所需的频谱，因为WLL系统必须与所有专用系统共享20mhz的DECT频谱，例如无绳电话和无绳专用分支交换机。描述了Gelsenkirchen田间试验系统中的一个特殊的“热点”测试活动。公共WLL和PCS系统的流量非常大。此外，在热点地区设置了35部私人DECT电话，每部电话产生大约一个Erlang的流量负荷。对私人和公共系统的表现进行了衡量。测试结果表明，在这种“热点”条件下，私有系统和公共系统的性能都很好。
{"title":"\"Hot spot\" trial for DECT as a WLL technology","authors":"Detlef Mansel, Andreas Müller, C. Plenge","doi":"10.1109/PIMRC.1997.631104","DOIUrl":"https://doi.org/10.1109/PIMRC.1997.631104","url":null,"abstract":"The DECT (Digital Enhanced Telecommunication System) is considered to be one of the prime candidates for the wireless local loop (WLL) and personal communication systems (PCS) as well. To test the DECT under real life conditions one of the new network operators, namely o.tel.o Kommunikationssysteme GmbH (former RWE Telliance GmbH), has set up a large field-trial system in Gelsenkirchen, Germany. A key issue is the spectrum needed for DECT as a WLL system, as the WLL system has to share the 20 MHz of DECT spectrum with all private systems, e.g. cordless phones and cordless private branch exchanges. A special \"hot spot\" test campaign within the Gelsenkirchen field-trial system is described. The public WLL and PCS systems were heavily loaded with traffic. In addition 35 private DECT telephones which generated a traffic load of approximately one Erlang each were set up in the hot spot area. The performance of the private and the public systems were measured. Test results show a very good performance of the private system and a good performance of the public system under this \"hot spot\" condition.","PeriodicalId":362340,"journal":{"name":"Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129004086","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 : 1997-09-01DOI: 10.1109/PIMRC.1997.627051
I. Rivas, L. Lopes
Radio-fibre microcellular networks are composed by small-size cells that make use of a fibre optic network for the conveyance of RF signals from a central controller to remote antennae at cellsite. This structure is particularly suitable to accomplish receiver and transmitter macrodiversity since the same RF channel can be transmitted and received through multiple ports, thus providing a large coverage area in which mobiles do not have to switch channels when roaming. This paper investigates the performance of multitransmitter diversity in fading channels, in noise and interference limited conditions. The problem differs from diversity reception in that signal combining is now non-coherent. Results are presented in terms of radio coverage and cochannel reuse efficiency firstly under Rayleigh fading only and secondly in a city street microcell environment. Simulcasting is an effective shadowing counteraction in noise conditions and achieves similar performance to no diversity in interference conditions.
{"title":"Transmitter macrodiversity in radio fibre microcellular networks","authors":"I. Rivas, L. Lopes","doi":"10.1109/PIMRC.1997.627051","DOIUrl":"https://doi.org/10.1109/PIMRC.1997.627051","url":null,"abstract":"Radio-fibre microcellular networks are composed by small-size cells that make use of a fibre optic network for the conveyance of RF signals from a central controller to remote antennae at cellsite. This structure is particularly suitable to accomplish receiver and transmitter macrodiversity since the same RF channel can be transmitted and received through multiple ports, thus providing a large coverage area in which mobiles do not have to switch channels when roaming. This paper investigates the performance of multitransmitter diversity in fading channels, in noise and interference limited conditions. The problem differs from diversity reception in that signal combining is now non-coherent. Results are presented in terms of radio coverage and cochannel reuse efficiency firstly under Rayleigh fading only and secondly in a city street microcell environment. Simulcasting is an effective shadowing counteraction in noise conditions and achieves similar performance to no diversity in interference conditions.","PeriodicalId":362340,"journal":{"name":"Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129371507","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 : 1997-09-01DOI: 10.1109/PIMRC.1997.627034
P. Karttunen, T. Laakso, Joseph Lilleberg
In future telecommunication systems, one of the most important ways to increase system capacity is to use adaptive antennas. They enable reception and transmission using narrow beams which drastically reduce interference for other users. The problem with the conventional adaptive tracking algorithms is that the adaptation performance is dictated by the choice of the convergence parameter or step size. We employ a multi-target tracking method and modify its tracking performance by an adaptive step size. The simulation results show that the proposed adaptive control of the convergence parameter gives fast convergence and small misadjustment errors, which cannot be combined by using fixed step size.
{"title":"Tracking of mobile users in a mobile communications system using adaptive convergence parameter","authors":"P. Karttunen, T. Laakso, Joseph Lilleberg","doi":"10.1109/PIMRC.1997.627034","DOIUrl":"https://doi.org/10.1109/PIMRC.1997.627034","url":null,"abstract":"In future telecommunication systems, one of the most important ways to increase system capacity is to use adaptive antennas. They enable reception and transmission using narrow beams which drastically reduce interference for other users. The problem with the conventional adaptive tracking algorithms is that the adaptation performance is dictated by the choice of the convergence parameter or step size. We employ a multi-target tracking method and modify its tracking performance by an adaptive step size. The simulation results show that the proposed adaptive control of the convergence parameter gives fast convergence and small misadjustment errors, which cannot be combined by using fixed step size.","PeriodicalId":362340,"journal":{"name":"Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97","volume":"1952 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129105049","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 : 1997-09-01DOI: 10.1109/PIMRC.1997.627010
J. Mayer, J. Schlee, T. Weber
In the early 1990s investigations towards an air interface for UMTS and IMT2000 were started at the Research Group for RF Communications. The result is an air interface, which uses a combination of the multiple access schemes FDMA, TDMA and CDMA, and in which signal separation in the receiver is performed by joint detection (JD). The air interface is termed JD-CDMA and adopts the philosophy of the de facto world standard GSM to an extent as large as possible. The authors investigate which extensions of the existing GSM protocols are necessary to support JD-CDMA, and how JD-CDMA protocols can be implemented.
{"title":"Protocol and signalling aspects of joint detection CDMA","authors":"J. Mayer, J. Schlee, T. Weber","doi":"10.1109/PIMRC.1997.627010","DOIUrl":"https://doi.org/10.1109/PIMRC.1997.627010","url":null,"abstract":"In the early 1990s investigations towards an air interface for UMTS and IMT2000 were started at the Research Group for RF Communications. The result is an air interface, which uses a combination of the multiple access schemes FDMA, TDMA and CDMA, and in which signal separation in the receiver is performed by joint detection (JD). The air interface is termed JD-CDMA and adopts the philosophy of the de facto world standard GSM to an extent as large as possible. The authors investigate which extensions of the existing GSM protocols are necessary to support JD-CDMA, and how JD-CDMA protocols can be implemented.","PeriodicalId":362340,"journal":{"name":"Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115833335","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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