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11th IEEE International Symposium on Personal Indoor and Mobile Radio Communications. PIMRC 2000. Proceedings (Cat. No.00TH8525)最新文献

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Voice-over-IP-over-wireless Voice-over-IP-over-wireless
11th IEEE International Symposium on Personal Indoor and Mobile Radio Communications. PIMRC 2000. Proceedings (Cat. No.00TH8525) Pub Date : 2000-09-18 DOI: 10.1109/PIMRC.2000.881384
K. Svanbro, J. Wiorek, B. Olin
{"title":"Voice-over-IP-over-wireless","authors":"K. Svanbro, J. Wiorek, B. Olin","doi":"10.1109/PIMRC.2000.881384","DOIUrl":"https://doi.org/10.1109/PIMRC.2000.881384","url":null,"abstract":"The IP-technology is gaining momentum and it seems inevitable that future wireless telephony services will be based on IP-technology. However, in order for this to become reality a number of issues must be solved. In this paper we present solutions-header compression and traffic classification-and figures indicating that for WCDMA, voice over IP can be competitive with traditional circuit switched speech services.","PeriodicalId":301441,"journal":{"name":"11th IEEE International Symposium on Personal Indoor and Mobile Radio Communications. PIMRC 2000. Proceedings (Cat. No.00TH8525)","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124520907","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}
引用次数: 8
Enhanced fast power control for WCDMA systems 增强WCDMA系统的快速功率控制
11th IEEE International Symposium on Personal Indoor and Mobile Radio Communications. PIMRC 2000. Proceedings (Cat. No.00TH8525) Pub Date : 2000-09-18 DOI: 10.1109/PIMRC.2000.881655
I. Virtej, Matti Rintamäki, H. Koivo
{"title":"Enhanced fast power control for WCDMA systems","authors":"I. Virtej, Matti Rintamäki, H. Koivo","doi":"10.1109/PIMRC.2000.881655","DOIUrl":"https://doi.org/10.1109/PIMRC.2000.881655","url":null,"abstract":"The continuous increase of cellular phones shapes up the appearance of new communication systems and new technologies. In real life the radio signals are subjected to Rayleigh fading (fast fading) and interference. These result in large variations in signal strength. Power control (PC) is needed to compensate for these effects. Power control is one of the critical radio resource control functions in a WCDMA-based system. This paper describes a contribution of applying an adaptive (self-tuning) controller in the fast power control loop of WCDMA systems. Replacing the conventional controller with a controller that decides the PC command based on the history of the PC commands and errors improves the quality of the transmission significantly.","PeriodicalId":301441,"journal":{"name":"11th IEEE International Symposium on Personal Indoor and Mobile Radio Communications. PIMRC 2000. Proceedings (Cat. No.00TH8525)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117198316","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}
引用次数: 10
Transient behavior of the linear adaptive combined space-time receiver for DS-CDMA systems DS-CDMA系统线性自适应组合空时接收机的瞬态特性
11th IEEE International Symposium on Personal Indoor and Mobile Radio Communications. PIMRC 2000. Proceedings (Cat. No.00TH8525) Pub Date : 2000-09-18 DOI: 10.1109/PIMRC.2000.881476
A. Legnain, D. Falconer
{"title":"Transient behavior of the linear adaptive combined space-time receiver for DS-CDMA systems","authors":"A. Legnain, D. Falconer","doi":"10.1109/PIMRC.2000.881476","DOIUrl":"https://doi.org/10.1109/PIMRC.2000.881476","url":null,"abstract":"A new adaptive combined space-time receiver for direct sequence code division multiple access (DS-CDMA) has been proposed previously to combat co-channel interference and enhance the capacity for cellular CDMA systems. It has been shown that this structure improves the cancellation capability of the CDMA systems compared to the conventional CDMA receiver and the adaptive multiuser structure. This structure combines the function of adaptive antenna array, adaptive multiuser detector and the RAKE receiver in one single structure. In this paper we study the transient behavior of the linear space-time receiver using the standard LMS algorithm. Results show that using the linear space-time receiver the training period could be reduced significantly, and the adaptation time is slightly affected by adding more interferers.","PeriodicalId":301441,"journal":{"name":"11th IEEE International Symposium on Personal Indoor and Mobile Radio Communications. PIMRC 2000. Proceedings (Cat. No.00TH8525)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127380114","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}
引用次数: 0
A path restricted sequence estimator using codeword characteristics 利用码字特征的路径受限序列估计器
11th IEEE International Symposium on Personal Indoor and Mobile Radio Communications. PIMRC 2000. Proceedings (Cat. No.00TH8525) Pub Date : 2000-09-18 DOI: 10.1109/PIMRC.2000.881630
Y. Kakura
{"title":"A path restricted sequence estimator using codeword characteristics","authors":"Y. Kakura","doi":"10.1109/PIMRC.2000.881630","DOIUrl":"https://doi.org/10.1109/PIMRC.2000.881630","url":null,"abstract":"This paper proposes a new approach for a sequence estimator to utilize redundancy of transmitted data more effectively. The main concept of the proposed estimator is that it compares only the path metrics of transition paths which agree with the coding rules of modulation in the sequence estimation process. The concept has been found to be effective even for a sequence estimator with decision feedback loops such as a DDFSE, for error propagation can be suppressed. Simulation results, using CCK as a codeword, show that the proposed estimator's packet error rate performance is superior to that of a DDFSE with a codeword correlator, with a 19% improvement in multipath tolerance and 3.5 dB improvement in noise tolerance.","PeriodicalId":301441,"journal":{"name":"11th IEEE International Symposium on Personal Indoor and Mobile Radio Communications. PIMRC 2000. Proceedings (Cat. No.00TH8525)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114958978","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}
引用次数: 3
Performance of the combination of interleaving and wavelet noise cancellation in mobile image transmission system 移动图像传输系统中交织与小波消噪相结合的性能
11th IEEE International Symposium on Personal Indoor and Mobile Radio Communications. PIMRC 2000. Proceedings (Cat. No.00TH8525) Pub Date : 2000-09-18 DOI: 10.1109/PIMRC.2000.881425
Li-Fang Peng, D. Yuan, Zhu-Wei Li, Dai-Fei Guo
{"title":"Performance of the combination of interleaving and wavelet noise cancellation in mobile image transmission system","authors":"Li-Fang Peng, D. Yuan, Zhu-Wei Li, Dai-Fei Guo","doi":"10.1109/PIMRC.2000.881425","DOIUrl":"https://doi.org/10.1109/PIMRC.2000.881425","url":null,"abstract":"This paper employs the four-state Markov models as the long-bursting error probability models over mobile fast-fading channels. The (2,1,7) convolutional codes with Viterbi (1971) decoding and the wavelet noise cancellation are combined as a new error-correcting scheme, whose performance in image communication system over mobile fast-fading channels is researched.","PeriodicalId":301441,"journal":{"name":"11th IEEE International Symposium on Personal Indoor and Mobile Radio Communications. PIMRC 2000. Proceedings (Cat. No.00TH8525)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122579454","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}
引用次数: 1
A generic radio channel emulator to evaluate higher layer protocols in a CDMA system 一种通用的无线电信道仿真器，用于评估CDMA系统中的高层协议
11th IEEE International Symposium on Personal Indoor and Mobile Radio Communications. PIMRC 2000. Proceedings (Cat. No.00TH8525) Pub Date : 2000-09-18 DOI: 10.1109/PIMRC.2000.881456
A. Umbert, P. Díaz
{"title":"A generic radio channel emulator to evaluate higher layer protocols in a CDMA system","authors":"A. Umbert, P. Díaz","doi":"10.1109/PIMRC.2000.881456","DOIUrl":"https://doi.org/10.1109/PIMRC.2000.881456","url":null,"abstract":"Currently, we are involved in the standardisation process to specify the next mobile system generation. A wideband code division multiple access (WCDMA) system is considered in most of the region versions. It would be very useful to count on a radio channel emulator which allows one to evaluate higher layers protocols within this context. This paper presents a radio channel emulator developed for a code division multiple access (CDMA) based system. Its versatility and low complexity have been exposed, and the validation process to check the model accuracy has also been shown for this system as an example.","PeriodicalId":301441,"journal":{"name":"11th IEEE International Symposium on Personal Indoor and Mobile Radio Communications. PIMRC 2000. Proceedings (Cat. No.00TH8525)","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122627012","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}
引用次数: 7
Adaptive filtering for fading channel estimation in WCDMA downlink WCDMA下行信道衰落估计的自适应滤波
11th IEEE International Symposium on Personal Indoor and Mobile Radio Communications. PIMRC 2000. Proceedings (Cat. No.00TH8525) Pub Date : 2000-09-18 DOI: 10.1109/PIMRC.2000.881484
P. Komulainen, V. Haikola
{"title":"Adaptive filtering for fading channel estimation in WCDMA downlink","authors":"P. Komulainen, V. Haikola","doi":"10.1109/PIMRC.2000.881484","DOIUrl":"https://doi.org/10.1109/PIMRC.2000.881484","url":null,"abstract":"In order to perform coherent demodulation in fading channel conditions, channel phase and amplitude estimation is necessary. In a WCDMA downlink, the common pilot code channel is used for channel estimation in order to facilitate multipath diversity combining. The quality of the channel estimates may be improved by averaging or filtering over several pilot symbols. However, the optimal form and bandwidth of the estimation filter depend on the channel fading statistics and signal-to-interference ratio. In this paper, we investigate pilot aided channel estimation through adaptive filtering. Thus, near optimum channel estimates are obtained with different fading channel speeds and frequency offsets.","PeriodicalId":301441,"journal":{"name":"11th IEEE International Symposium on Personal Indoor and Mobile Radio Communications. PIMRC 2000. Proceedings (Cat. No.00TH8525)","volume":"186 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114382972","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}
引用次数: 4
Call control scenarios in the "all-IP" UMTS core network “全ip”UMTS核心网呼叫控制场景
11th IEEE International Symposium on Personal Indoor and Mobile Radio Communications. PIMRC 2000. Proceedings (Cat. No.00TH8525) Pub Date : 2000-09-18 DOI: 10.1109/PIMRC.2000.881441
Delphine Plasse
{"title":"Call control scenarios in the \"all-IP\" UMTS core network","authors":"Delphine Plasse","doi":"10.1109/PIMRC.2000.881441","DOIUrl":"https://doi.org/10.1109/PIMRC.2000.881441","url":null,"abstract":"This paper gives an overview of the 3GPP \"all IP\" architecture for the core network of UMTS. It presents some call control and network resource allocation scenarios using SIP for multimedia call management in a packet-switched network, UMTS/GPRS network and multimedia IP-based networks.","PeriodicalId":301441,"journal":{"name":"11th IEEE International Symposium on Personal Indoor and Mobile Radio Communications. PIMRC 2000. Proceedings (Cat. No.00TH8525)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122099978","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}
引用次数: 5
Iterative blind and non-blind channel estimation in GSM receivers GSM接收机的迭代盲和非盲信道估计
11th IEEE International Symposium on Personal Indoor and Mobile Radio Communications. PIMRC 2000. Proceedings (Cat. No.00TH8525) Pub Date : 2000-09-18 DOI: 10.1109/PIMRC.2000.881485
T. Petermann, V. Kühn, K. Kammeyer
{"title":"Iterative blind and non-blind channel estimation in GSM receivers","authors":"T. Petermann, V. Kühn, K. Kammeyer","doi":"10.1109/PIMRC.2000.881485","DOIUrl":"https://doi.org/10.1109/PIMRC.2000.881485","url":null,"abstract":"Channel estimation plays a leading role in wireless communication systems such as GSM (Global System for Mobile communications). Putting the main emphasis on investigating the application of non-blind and blind channel estimation approaches to the identification of a full rate data Traffic CHannel (TCH/F9.6), we present a new idea of an iterative channel estimation based upon the capabilities of channel coding. We show that this method leads to a significantly improved performance especially for high speed propagations with Doppler frequencies up to 500 Hz. Giving the bit error rates (BERs) before and after channel decoding in terms of the E~/sub b//N/sub 0/ ratio, we show, furthermore, that blind channel estimation schemes could be as efficient as non-blind methods.","PeriodicalId":301441,"journal":{"name":"11th IEEE International Symposium on Personal Indoor and Mobile Radio Communications. PIMRC 2000. Proceedings (Cat. No.00TH8525)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117016284","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}
引用次数: 9
A framework for the evaluation of IP mobility protocols 一个评估IP移动协议的框架
11th IEEE International Symposium on Personal Indoor and Mobile Radio Communications. PIMRC 2000. Proceedings (Cat. No.00TH8525) Pub Date : 2000-09-18 DOI: 10.1109/PIMRC.2000.881465
P. Eardley, A. Mihailovic, T. Suihko
{"title":"A framework for the evaluation of IP mobility protocols","authors":"P. Eardley, A. Mihailovic, T. Suihko","doi":"10.1109/PIMRC.2000.881465","DOIUrl":"https://doi.org/10.1109/PIMRC.2000.881465","url":null,"abstract":"In this paper we suggest a classification scheme for IP mobility protocols and propose a framework for comparing them. We then use the framework to provide an initial comparison of previous proposals for supporting micro-mobility. The authors are part of project BRAIN (Broadband Radio Access for IP based Networks)-a European collaborative project under the IST (Information Societies Technology) programme. One aim of the project is to propose an open architecture for wireless broadband Internet access, concentrating on issues in the access network.","PeriodicalId":301441,"journal":{"name":"11th IEEE International Symposium on Personal Indoor and Mobile Radio Communications. PIMRC 2000. Proceedings (Cat. No.00TH8525)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128320483","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}
引用次数: 31
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