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1997 IEEE 47th Vehicular Technology Conference. Technology in Motion最新文献

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A novel approach to multiuser detection for CDMA systems 一种新的CDMA系统多用户检测方法
1997 IEEE 47th Vehicular Technology Conference. Technology in Motion Pub Date : 1997-05-04 DOI: 10.1109/VETEC.1997.600391
P. Djuric, Min Guo
{"title":"A novel approach to multiuser detection for CDMA systems","authors":"P. Djuric, Min Guo","doi":"10.1109/VETEC.1997.600391","DOIUrl":"https://doi.org/10.1109/VETEC.1997.600391","url":null,"abstract":"A new scheme for multiuser detection is proposed. The detector is based on the Fisher's linear discriminant function whose weights are obtained from periodically transmitted training data. The proposed detector does not require knowledge of the signatures of the remaining users in the system and no assumptions are made in its derivation regarding the noise which corrupts the signal. Also, the same detector can work in both, synchronous and asynchronous systems. The computer simulations show that the detector performs very well in a wide range of signal-to-noise ratios and has excellent performance in cases when the received signals from various users have unequal powers.","PeriodicalId":389634,"journal":{"name":"1997 IEEE 47th Vehicular Technology Conference. Technology in Motion","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127196232","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: 2
Experimental evaluation of the two-dimensional mobile propagation environment at 2 GHz 2ghz二维移动传播环境的实验评估
1997 IEEE 47th Vehicular Technology Conference. Technology in Motion Pub Date : 1997-05-04 DOI: 10.1109/VETEC.1997.605962
J. Laiho-Steffens, A. Wacker
{"title":"Experimental evaluation of the two-dimensional mobile propagation environment at 2 GHz","authors":"J. Laiho-Steffens, A. Wacker","doi":"10.1109/VETEC.1997.605962","DOIUrl":"https://doi.org/10.1109/VETEC.1997.605962","url":null,"abstract":"The paper evaluates experimentally the most important parameters of the two-dimensional (2D) propagation environment. For this purpose, measurements with both fixed and rotating base station (BS) antenna arrays were performed. With a fixed array installation, environmental parameters, such as effective side lobe level (ESL) and cross polarisation discrimination (XPD) were evaluated. With the rotating BS antenna path angular spread (PAS), total angular spread values and the two-dimensional channel impulse responses (2D-CIR) were recorded. Two BS sites were used. With the measured data a simple beam pointing algorithm was tested and the number of receiving beams needed in different measured locations for optimum reception was estimated. With the measured 2D data simple 2D-RAKE allocation routines were done related to a CDMA-SDMA application.","PeriodicalId":389634,"journal":{"name":"1997 IEEE 47th Vehicular Technology Conference. Technology in Motion","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127336258","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
Acquisition performance of blind sequence detectors using per-survivor processing 基于每幸存者处理的盲序列检测器的采集性能
1997 IEEE 47th Vehicular Technology Conference. Technology in Motion Pub Date : 1997-05-04 DOI: 10.1109/VETEC.1997.600385
K. Chugg
{"title":"Acquisition performance of blind sequence detectors using per-survivor processing","authors":"K. Chugg","doi":"10.1109/VETEC.1997.600385","DOIUrl":"https://doi.org/10.1109/VETEC.1997.600385","url":null,"abstract":"The acquisition capabilities of binary sequence detection algorithms based on per-survivor processing (PSP) is demonstrated via numerical results. The limits of these capabilities are motivated based on analytical results and verified via computer simulations. It is demonstrated that the acquisition of PSP-based data detection algorithms is very rapid and can be improved even further by carefully initialization.","PeriodicalId":389634,"journal":{"name":"1997 IEEE 47th Vehicular Technology Conference. Technology in Motion","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127367695","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
Mobile radio packet data communications in a TDMA digital cellular system TDMA数字蜂窝系统中的移动无线电分组数据通信
1997 IEEE 47th Vehicular Technology Conference. Technology in Motion Pub Date : 1997-05-04 DOI: 10.1109/VETEC.1997.600487
A. Murase, A. Maebara, I. Okajima, S. Hirata
{"title":"Mobile radio packet data communications in a TDMA digital cellular system","authors":"A. Murase, A. Maebara, I. Okajima, S. Hirata","doi":"10.1109/VETEC.1997.600487","DOIUrl":"https://doi.org/10.1109/VETEC.1997.600487","url":null,"abstract":"A packet data communication (PDC) system merged in a TDMA digital cellular network has been developed. PDC mobile packet data communication system (PDC-P) enables PDC users to send and receive packet data in the connectionless environment of multimedia mobile communications. The main features of PDC-P are high throughput of user packet data, flexibility for service demands and linkage of voice services. This paper describes the proposed functions, architecture, and signaling for the PDC-P network. Also, new techniques for radio transmission control and network routing control are discussed here.","PeriodicalId":389634,"journal":{"name":"1997 IEEE 47th Vehicular Technology Conference. Technology in Motion","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129919096","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
Simple adaptive interference canceler suitable for DS-CDMA mobile radio 适用于DS-CDMA移动无线电的简单自适应干扰消除器
1997 IEEE 47th Vehicular Technology Conference. Technology in Motion Pub Date : 1997-05-04 DOI: 10.1109/VETEC.1997.605872
E. Taecinami, H. Murata, S. Yoshida
{"title":"Simple adaptive interference canceler suitable for DS-CDMA mobile radio","authors":"E. Taecinami, H. Murata, S. Yoshida","doi":"10.1109/VETEC.1997.605872","DOIUrl":"https://doi.org/10.1109/VETEC.1997.605872","url":null,"abstract":"The blind adaptive interference canceler using the constrained minimum output power algorithm cancels co-channel interference without any prior information of other users' codes. However, it tends to cancel the desired signal due to non-orthogonality caused by frequency selective fading. In order to protect the desired signal, a large amount of computational complexity is introduced in the previous method. In this paper, we propose a simple adaptive interference canceler, which significantly reduces the computational complexity, yet achieves almost the same BER performance as the previous scheme.","PeriodicalId":389634,"journal":{"name":"1997 IEEE 47th Vehicular Technology Conference. Technology in Motion","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122364351","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
The optimization and application of the W.C.Y. Lee propagation model in the 1900 MHz frequency band 李振英1900 MHz频段传播模型的优化与应用
1997 IEEE 47th Vehicular Technology Conference. Technology in Motion Pub Date : 1997-05-04 DOI: 10.1109/VETEC.1997.596324
G. Evans, B. Joslin, L. Vinson, B. Foose
{"title":"The optimization and application of the W.C.Y. Lee propagation model in the 1900 MHz frequency band","authors":"G. Evans, B. Joslin, L. Vinson, B. Foose","doi":"10.1109/VETEC.1997.596324","DOIUrl":"https://doi.org/10.1109/VETEC.1997.596324","url":null,"abstract":"We explore the optimization and application of W.C.Y. Lee's (1986, 1989) RF propagation model at 1900 MHz. Lee's model has been used successfully throughout the cellular industry for macro-cellular propagation analysis with great success. Using Lee's model at 1900 MHz would be reasonable if the same degree of accuracy could be achieved as that of cellular frequencies. We maintain that this accuracy can be achieved, as evident by our application and optimization of the Lee model at 1900 MHz.","PeriodicalId":389634,"journal":{"name":"1997 IEEE 47th Vehicular Technology Conference. Technology in Motion","volume":"142 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123737164","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: 23
Error performance analysis of data based fast channel estimation for CDMA uplink with staggered burst pilot 码分多址上行交错突发导频下基于数据的快速信道估计误差性能分析
1997 IEEE 47th Vehicular Technology Conference. Technology in Motion Pub Date : 1997-05-04 DOI: 10.1109/VETEC.1997.606010
J. Na
{"title":"Error performance analysis of data based fast channel estimation for CDMA uplink with staggered burst pilot","authors":"J. Na","doi":"10.1109/VETEC.1997.606010","DOIUrl":"https://doi.org/10.1109/VETEC.1997.606010","url":null,"abstract":"A coherent detection scheme with data based channel estimation (DBCE) is considered to evaluate the error performance of a CDMA uplink with staggered burst pilot. As the pilot burst triggers DBCE operation periodically, DBCE operation is shown to be remarkably stable to Gaussian noise and Doppler shift with proper parameter setting until the next pilot burst arrives. In the DBCE detected data is re-coded and integrated over multiple symbols for the stable channel estimation which is again used for the coherent detection. This paper focuses the analytical modelling and evaluation of the error performance of DBCE as the integration interval and Eb/NO of received signal varies.","PeriodicalId":389634,"journal":{"name":"1997 IEEE 47th Vehicular Technology Conference. Technology in Motion","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130775836","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
STU-III secure bearer service option invocation reliability over enhanced IS-136 TDMA digital cellular ACELP IS-641 vocoder 在增强型IS-136 TDMA数字蜂窝ACELP IS-641声码器上，STU-III安全承载业务选项调用可靠性
1997 IEEE 47th Vehicular Technology Conference. Technology in Motion Pub Date : 1997-05-04 DOI: 10.1109/VETEC.1997.600410
D.J. Rahimta, R. Krebs, J. Zakar, S. Roberts
{"title":"STU-III secure bearer service option invocation reliability over enhanced IS-136 TDMA digital cellular ACELP IS-641 vocoder","authors":"D.J. Rahimta, R. Krebs, J. Zakar, S. Roberts","doi":"10.1109/VETEC.1997.600410","DOIUrl":"https://doi.org/10.1109/VETEC.1997.600410","url":null,"abstract":"The U.S. Government is working with cellular/PCS standard bodies to develop bearer service option modes that will enable secure end-to-end digital voice between cellular handsets and existing STU-III (Secure Terminal Unit, 3rd generation) phones. A requirement is that handsets be able to reliably detect brief analog \"go-secure\" signaling sent by a STU-III as it attempts to transition from plain voice to encrypted voice mode, especially under conditions of fading errors. A simulation experiment is designed and conducted, demonstrating the feasibility of detecting such a proposed bearer option request under many environmental conditions.","PeriodicalId":389634,"journal":{"name":"1997 IEEE 47th Vehicular Technology Conference. Technology in Motion","volume":"159 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132860354","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: 2
The prudence transmission method I (PTM I): a retransmission cut-off method for contention based multiple-access communication systems 谨慎传输方法I (PTM I):一种基于争用的多址通信系统的重传截止方法
1997 IEEE 47th Vehicular Technology Conference. Technology in Motion Pub Date : 1997-05-04 DOI: 10.1109/VETEC.1997.596388
J. Sarker, S. J. Halme
{"title":"The prudence transmission method I (PTM I): a retransmission cut-off method for contention based multiple-access communication systems","authors":"J. Sarker, S. J. Halme","doi":"10.1109/VETEC.1997.596388","DOIUrl":"https://doi.org/10.1109/VETEC.1997.596388","url":null,"abstract":"A transmission policy is studied for the random access slotted ALOHA channel in terms of the number of transmissions. A stable operation of slotted ALOHA can be achieved by reducing the transmission number for a specific limit of the new packet generation rate. Our results show that the control of transmission number is not needed if the new packet generation rate from all active users is less than e/sup -1/ packet per time slot. We have introduced an optimum transmission method called the \"prudence transmission method (PTM)\" which gives the maximum throughput. This can be done by adjusting the number of transmission for a given new packet generation rate, when it is greater than e/sup -1/ packet per time slot. The result shows that the number of transmissions decrease abruptly with the increase of the new packet generation rate. For the stable operation of slotted ALOHA, the maximum allowable new packet generation rate is 1 packet per time slot. The results of this study are portrayed on graphs and may be used as a guideline of a contention based multiple access scheme with and without retransmission cut-off.","PeriodicalId":389634,"journal":{"name":"1997 IEEE 47th Vehicular Technology Conference. Technology in Motion","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132898652","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: 11
Performance of simulcast systems in mobile radio environments 移动无线电环境中联播系统的性能
1997 IEEE 47th Vehicular Technology Conference. Technology in Motion Pub Date : 1997-05-04 DOI: 10.1109/VETEC.1997.600376
Dukhyun Kim, G. Stuber, N. Hightower
{"title":"Performance of simulcast systems in mobile radio environments","authors":"Dukhyun Kim, G. Stuber, N. Hightower","doi":"10.1109/VETEC.1997.600376","DOIUrl":"https://doi.org/10.1109/VETEC.1997.600376","url":null,"abstract":"Simulcast paging systems are considered, where the differential propagation delays to a receiver from different transmitters can cause severe intersymbol interference. Two simulcast paging systems are evaluated, denoted by Systems A and B. System A uses Gaussian minimum shift keying (GMSK) with a channel bandwidth of 12.5 kHz, whereas System B uses 4-level FM with a channel bandwidth of 25 kHz. With simulcast systems, it is important to identify the maximum tolerable differential delay. For this purpose, the simulcast channel is modeled as a two-ray fading channel, where each ray is independently Rayleigh faded. Performance results are obtained while varying the differential delay and power ratio between the two rays, and the Doppler spread.","PeriodicalId":389634,"journal":{"name":"1997 IEEE 47th Vehicular Technology Conference. Technology in Motion","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132035690","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
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