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

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Fading characterization of the mobile radio channel at the millimetre waveband 毫米波波段移动无线电信道的衰落特性
1997 IEEE 47th Vehicular Technology Conference. Technology in Motion Pub Date : 1997-05-04 DOI: 10.1109/VETEC.1997.600480
P. Vasconcelos, L. M. Correia
{"title":"Fading characterization of the mobile radio channel at the millimetre waveband","authors":"P. Vasconcelos, L. M. Correia","doi":"10.1109/VETEC.1997.600480","DOIUrl":"https://doi.org/10.1109/VETEC.1997.600480","url":null,"abstract":"This paper presents an analysis of fast fading for the mobile radio channel in the millimetre waveband (60 GHz), by comparing data coming from theory, measurements and simulations. Rice distribution is used as theoretical reference, and the Rice parameter is obtained from measurements by adjusting the experimental and the theoretical cumulative distribution functions; good agreement is obtained between the two cases. An analysis of the level crossing rate is also carried out, the agreement being less favourable than the previous one. Results from a ray-tracing tool are also compared with theory, with good results only for the cumulative distribution function. It seems that Rice distribution can in fact be used to model the fast fading behaviour of this channel, and to describe second order statistical parameters. On the other hand, simulation tools seem to be unable to describe the signal with enough accuracy to obtain good results for second order parameters at specific locations of the scenarios.","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":"121476884","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: 12
CDMA forward link capacity and coverage in a multipath fading channel 多径衰落信道中的CDMA前向链路容量和覆盖范围
1997 IEEE 47th Vehicular Technology Conference. Technology in Motion Pub Date : 1997-05-04 DOI: 10.1109/VETEC.1997.605504
L. Jalloul, K. Rohani
{"title":"CDMA forward link capacity and coverage in a multipath fading channel","authors":"L. Jalloul, K. Rohani","doi":"10.1109/VETEC.1997.605504","DOIUrl":"https://doi.org/10.1109/VETEC.1997.605504","url":null,"abstract":"This paper presents an analysis of the CDMA forward link capacity and coverage in a multipath fading channel for slow moving users. Previous analysis of CDMA capacity ignored several factors that affect the forward link performance. The analysis presented in this paper takes into account short term fading, lognormal shadowing, frame error rate (FER) requirement, outage, power allocation, soft handoff, the number of multipaths and the number of required RAKE fingers. Finally, both Rayleigh and Rician fading are considered.","PeriodicalId":389634,"journal":{"name":"1997 IEEE 47th Vehicular Technology Conference. Technology in Motion","volume":"51 28","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113957728","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
Blind equalization for short burst communications over frequency selective wireless channels 频率选择无线信道上短突发通信的盲均衡
1997 IEEE 47th Vehicular Technology Conference. Technology in Motion Pub Date : 1997-05-04 DOI: 10.1109/VETEC.1997.600386
Byoung-Jo J. Kim, D. Cox
{"title":"Blind equalization for short burst communications over frequency selective wireless channels","authors":"Byoung-Jo J. Kim, D. Cox","doi":"10.1109/VETEC.1997.600386","DOIUrl":"https://doi.org/10.1109/VETEC.1997.600386","url":null,"abstract":"We investigate a blind equalization problem for short burst communications. Blind equalization becomes important for short burst communications, since training overhead can be significant when only a small number of bits are transmitted at a time. However, blind equalization has not been studied for cases where only a few bits are available in a burst for converging an adaptive blind equalizer. Several important points in applying blind equalization using constant modulus algorithm (CMA) to a short burst wireless communication have been identified. They include problems associated with convergence speed, ill convergence, short burst implications, dual mode operation, a fractionally spaced CMA equalizer and its initialization. Solutions to these problems are presented and incorporated in the algorithm. Simulations are performed using more than 4500 frequency-selectively fading channels. The results support the feasibility of the proposed algorithm.","PeriodicalId":389634,"journal":{"name":"1997 IEEE 47th Vehicular Technology Conference. Technology in Motion","volume":"21 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":"127645385","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 new passive traffic detector 一种新型被动交通检测器
1997 IEEE 47th Vehicular Technology Conference. Technology in Motion Pub Date : 1997-05-04 DOI: 10.1109/VETEC.1997.596329
E. Boch, P. Gee, T. Nasu
{"title":"A new passive traffic detector","authors":"E. Boch, P. Gee, T. Nasu","doi":"10.1109/VETEC.1997.596329","DOIUrl":"https://doi.org/10.1109/VETEC.1997.596329","url":null,"abstract":"There has been an increasing need to improve traffic flow within urban centres without increasing the required roadway infrastructure. As a result of this requirement, automated traffic control systems have been evolving at a steady pace. Central to the operation of any automated traffic control system is the need to reliably detect vehicular traffic flow. Currently, this detection function was primarily carried out through the use of buried inductive loop sensors. Buried inductive loops have been in service for many years. Inductive loops typically require stopping or re-routing traffic during installation and are prone to breakage as a result of weather-related effects or construction. A variety of sensors have been developed for the replacement of buried loops. Of the technologies being employed in these sensors, those normally associated with all-weather day/night capability are radiating (active). Active sensors pose a certain degree of public health concern and are hence not a favoured solution. This paper describes the design and performance of a new, overhead vehicle sensor which relies on naturally occurring radio emissions. The sensor, mounted in an overhead or sidefire position, is intended to provide all-weather, day/night vehicle detection without any potential for public health safety impacts. Prototype test results are presented from a number of trial sites in varying weather conditions.","PeriodicalId":389634,"journal":{"name":"1997 IEEE 47th Vehicular Technology Conference. Technology in Motion","volume":"17 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":"126302968","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
Soft handoff modeling in CDMA cellular systems CDMA蜂窝系统的软切换建模
1997 IEEE 47th Vehicular Technology Conference. Technology in Motion Pub Date : 1997-05-04 DOI: 10.1109/VETEC.1997.605651
J. Kwon, D. Sung
{"title":"Soft handoff modeling in CDMA cellular systems","authors":"J. Kwon, D. Sung","doi":"10.1109/VETEC.1997.605651","DOIUrl":"https://doi.org/10.1109/VETEC.1997.605651","url":null,"abstract":"We propose a new analytical soft handoff model in a rectangular cell configuration and obtain the probability distribution of the sojourn time in the soft handoff region. The movements of a mobile user are categorized into several transition cases for calculating the probability distribution. We obtain the probability distribution for each transition case and the resulting probability distribution by unconditioning the transition cases. We can derive various probability distributions by varying model parameters and observe the effects of parameters. These distributions can be utilized in characterizing various traffic characteristics such as soft handoff traffic and mean handoff rate.","PeriodicalId":389634,"journal":{"name":"1997 IEEE 47th Vehicular Technology Conference. Technology in Motion","volume":"38 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":"125465459","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: 21
Low power frequeney-to-time conversion for cellular systems using predictive zero-crossing 基于预测过零的蜂窝系统低功率频率-时间转换
1997 IEEE 47th Vehicular Technology Conference. Technology in Motion Pub Date : 1997-05-04 DOI: 10.1109/VETEC.1997.600495
A. Dutta, S. Kiaei, S. Talwalkar
{"title":"Low power frequeney-to-time conversion for cellular systems using predictive zero-crossing","authors":"A. Dutta, S. Kiaei, S. Talwalkar","doi":"10.1109/VETEC.1997.600495","DOIUrl":"https://doi.org/10.1109/VETEC.1997.600495","url":null,"abstract":"This paper discusses one of the zero crossing based FM demodulator architectures and its application in demodulating /spl pi//4-QPSK and MSK transmitted signals. Special attention has been paid to reduce the power consumption in the demodulator using the statistics of spacing between zero crossings.","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":"127950612","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
Application of the PR principle to combat intercellular interference in cellular CTDMA PR原理在蜂窝CTDMA中抗细胞间干扰的应用
1997 IEEE 47th Vehicular Technology Conference. Technology in Motion Pub Date : 1997-05-04 DOI: 10.1109/VETEC.1997.605874
C. Schlegel, J. Ruprechts
{"title":"Application of the PR principle to combat intercellular interference in cellular CTDMA","authors":"C. Schlegel, J. Ruprechts","doi":"10.1109/VETEC.1997.605874","DOIUrl":"https://doi.org/10.1109/VETEC.1997.605874","url":null,"abstract":"Code time division multiple access (CTDMA) was shown earlier to be a CDMA type air interface suitable for future personal communication systems (PCS). It outperforms other proposals due to its low-complexity receiver implementation that avoids intracell interuser interference. This paper investigates the performance of an enhanced medium complexity receiver structure based on the projection receiver (PR) principle in order to reduce the intercell interference.","PeriodicalId":389634,"journal":{"name":"1997 IEEE 47th Vehicular Technology Conference. Technology in Motion","volume":"31 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":"131930663","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
Blind adaptation algorithms for direct-sequence spread-spectrum CDMA single-user detection 直接序列扩频CDMA单用户检测的盲自适应算法
1997 IEEE 47th Vehicular Technology Conference. Technology in Motion Pub Date : 1997-05-04 DOI: 10.1109/VETEC.1997.605987
N. Zečević, J. Reed
{"title":"Blind adaptation algorithms for direct-sequence spread-spectrum CDMA single-user detection","authors":"N. Zečević, J. Reed","doi":"10.1109/VETEC.1997.605987","DOIUrl":"https://doi.org/10.1109/VETEC.1997.605987","url":null,"abstract":"Single-user detection techniques mitigate multiple access interference and the near-far problem in direct-sequence spread-spectrum CDMA systems. Trained adaptation algorithms are commonly used to adapt the receivers. Two blind adaptation algorithms, the Griffths' (1989) algorithm and the linearly constrained constant modulus algorithm (LCCMA), are proposed for this application. Simulation results show a performance greatly superior to that of the conventional receiver and close to the case of trained adaptive receivers. Blind adaptation allows for a much more flexible network design by eliminating the need for a training sequence.","PeriodicalId":389634,"journal":{"name":"1997 IEEE 47th Vehicular Technology Conference. Technology in Motion","volume":"22 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":"130082422","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: 36
Most recent interaction area and speed-based intelligent paging in PCS 最新的基于交互区域和速度的pc智能分页技术
1997 IEEE 47th Vehicular Technology Conference. Technology in Motion Pub Date : 1997-05-04 DOI: 10.1109/VETEC.1997.600378
S. Mishra, O. Tonguz
{"title":"Most recent interaction area and speed-based intelligent paging in PCS","authors":"S. Mishra, O. Tonguz","doi":"10.1109/VETEC.1997.600378","DOIUrl":"https://doi.org/10.1109/VETEC.1997.600378","url":null,"abstract":"Due to the anticipated increase in user demand and limited radio resources, efficient location management techniques are desired in future personal communication systems (PCS). The key elements of location management are paging and location registration/updating. This work shows that if intelligence is added to the sequential paging scheme in the form of speed and the most recent interaction area of a portable station (PS), then the cost of location management can be reduced substantially. It is shown that if the PS receives a call within a certain time after reporting its speed to the system, this simple intelligent scheme, which simply classifies subscribers as pedestrians and cars, is indeed better than simultaneous and sequential paging schemes. The schemes are also analysed under a two paging area constraint.","PeriodicalId":389634,"journal":{"name":"1997 IEEE 47th Vehicular Technology Conference. Technology in Motion","volume":"39 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":"134433919","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: 24
The design of specifications for satellite PCN handheld antennas 卫星PCN手持天线的设计规范
1997 IEEE 47th Vehicular Technology Conference. Technology in Motion Pub Date : 1997-05-04 DOI: 10.1109/VETEC.1997.596314
A. Agius, S. Saunders, B. Evans
{"title":"The design of specifications for satellite PCN handheld antennas","authors":"A. Agius, S. Saunders, B. Evans","doi":"10.1109/VETEC.1997.596314","DOIUrl":"https://doi.org/10.1109/VETEC.1997.596314","url":null,"abstract":"The relation between the pattern shape and the performance of an SPCN handheld antenna is examined based on the relation between the environment and the noise received by the antenna. Typical quadrifilar helix antenna patterns in different environments were used to calculate the received noise and to evaluate the performance of these antennas for the ICO satellite system.","PeriodicalId":389634,"journal":{"name":"1997 IEEE 47th Vehicular Technology Conference. Technology in Motion","volume":"29 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":"134525619","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
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