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Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367)最新文献

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A new software radio based distributed base station architecture and its application to 3G UMTS employing signal combining techniques 一种新的基于软件无线电的分布式基站体系结构及其在3G UMTS中的应用
Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367) Pub Date : 2002-08-07 DOI: 10.1109/VTC.2002.1002700
H. Nie, P. Mathiopoulos
{"title":"A new software radio based distributed base station architecture and its application to 3G UMTS employing signal combining techniques","authors":"H. Nie, P. Mathiopoulos","doi":"10.1109/VTC.2002.1002700","DOIUrl":"https://doi.org/10.1109/VTC.2002.1002700","url":null,"abstract":"We propose a software radio based distributed base station (DBS) architecture which replaces conventional base stations with a cluster of DBS and a central processing station (CPS) which are connected by a high speed data communication network. As most signal processing is carried out in the CPS, the DBS is compact and lightweight, and requires low power for operation, so it can be deployed economically and virtually everywhere. Furthermore, since the radio signals received by different DBS are processed in one CPS, signal combining techniques (SCT) can be employed to improve the reverse link capacity of the 3G UMTS. Analytical expressions for this improvement are derived using the concept of percentage of coverage area with and without the SCT. Complementary computer simulation results for a cdma2000 system have also shown that by employing the SCT, the proposed software radio based DBS architecture can achieve significant reverse link capacity improvement.","PeriodicalId":159750,"journal":{"name":"Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367)","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122095451","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
Distance-based location update scheme with isotropic random user motion with drift 带有漂移的各向同性随机用户运动的基于距离的位置更新方案
Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367) Pub Date : 2002-08-07 DOI: 10.1109/VTC.2002.1002786
Woo-Jin Choi, S. Tekinay
{"title":"Distance-based location update scheme with isotropic random user motion with drift","authors":"Woo-Jin Choi, S. Tekinay","doi":"10.1109/VTC.2002.1002786","DOIUrl":"https://doi.org/10.1109/VTC.2002.1002786","url":null,"abstract":"Location tracking in wireless networks is essential for ubiquitous communication service. Since a user may move freely, the network has to keep track of the location of the mobile terminal to deliver messages or calls. There has been significant effort to address the problem of user mobility; however, most of the mobility models introduced in the previous work do not take the movement direction into account - the parameter called CMR (call to mobility ratio) which is commonly used in the literature is the ratio between the call arrival rate and the cell boundary crossing rate of the mobile. In this paper, we introduce Brownian motion with drift as our mobility model and discuss the effect of movement direction and call arrivals on the performance of the distance-based location update scheme in the predictive and the non predictive mode.","PeriodicalId":159750,"journal":{"name":"Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117333679","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
Investigation of the UMTS to GSM handover procedure UMTS到GSM切换程序的调查
Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367) Pub Date : 2002-08-07 DOI: 10.1109/VTC.2002.1002937
M. Benson, H. Thomas
{"title":"Investigation of the UMTS to GSM handover procedure","authors":"M. Benson, H. Thomas","doi":"10.1109/VTC.2002.1002937","DOIUrl":"https://doi.org/10.1109/VTC.2002.1002937","url":null,"abstract":"UMTS is a third generation (3G) mobile communications system, currently being standardized and developed by many mobile technology manufacturers and operators. Unlike the second generation systems such as GSM, which provide voice and low speed data services, 3G promises to provide high speed data as well as multiple-data rate services, which is opening doors to many exciting multimedia applications. The initial deployment of UMTS is expected to be in cities, providing islands of coverage. Therefore, effective handover from UMTS to GSM is imperative for mobiles when they roam out of UMTS coverage. The paper presents the results of system simulations which provide some insights into the conditions and parameters involved in inter-system handover from UMTS-FDD to GSM.","PeriodicalId":159750,"journal":{"name":"Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129760479","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
A simple approach to site sensitive modeling of indoor radio propagation 室内无线电传播场地敏感建模的一种简单方法
Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367) Pub Date : 2002-08-07 DOI: 10.1109/VTC.2002.1002732
D. Browne, J. Medbø, H. Asplund, J. Berg
{"title":"A simple approach to site sensitive modeling of indoor radio propagation","authors":"D. Browne, J. Medbø, H. Asplund, J. Berg","doi":"10.1109/VTC.2002.1002732","DOIUrl":"https://doi.org/10.1109/VTC.2002.1002732","url":null,"abstract":"The approach presented herein provides a simple and accurate propagation model for indoor environments. The model is able to generate point sources with joint angle-delay-power characteristics that are sensitive to the macrostructure of the site's floorplan geometry. This is achieved in two stages. First, the floorplan geometry is reduced to an essential set of features using an automated routine based on computational geometry. Then an algorithmic set of propagation rules founded on finite difference time domain and ray tracing simulations are applied to the reduced geometry to reconstruct propagation paths. Simulation results are presented and compared with recent data from a measurement campaign for the same scenario. The model is seen to accurately capture the macrostructure characteristics of the channel including angle spread, delay spread, temporal clustering, angular clustering, and power profile.","PeriodicalId":159750,"journal":{"name":"Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129858848","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
Design schemes of space-time block codes concatenated with turbo codes 空时分组码与turbo码串联的设计方案
Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367) Pub Date : 2002-08-07 DOI: 10.1109/VTC.2002.1002645
Junghoon Suh, M. Howlader
{"title":"Design schemes of space-time block codes concatenated with turbo codes","authors":"Junghoon Suh, M. Howlader","doi":"10.1109/VTC.2002.1002645","DOIUrl":"https://doi.org/10.1109/VTC.2002.1002645","url":null,"abstract":"Higher transmission rate and reliable communication over fading channels are major research pursuits of current wireless communications. The space-time block codes (STBC) have been introduced to improve those research goals by simple processing algorithms at the transmitter and the receiver ends. STBC designs with the help of an orthogonal design method are described. The STBC designed in a quasi-orthogonal method is focused on keeping the higher transmission rate at the cost of the diversity gain. On the other hand, STBC designed in complex orthogonal methods emphasize the high diversity gain rather than the rate. Design schemes of turbo concatenation to STBC using various methods are introduced and detailed performance analyses are provided.","PeriodicalId":159750,"journal":{"name":"Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128348700","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: 13
Channel equalisation for OFDM using scattered pilots 使用分散导频的OFDM信道均衡
Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367) Pub Date : 2002-08-07 DOI: 10.1109/VTC.2002.1002647
N. Chen, R. Heaton, Miyuki Tanaka
{"title":"Channel equalisation for OFDM using scattered pilots","authors":"N. Chen, R. Heaton, Miyuki Tanaka","doi":"10.1109/VTC.2002.1002647","DOIUrl":"https://doi.org/10.1109/VTC.2002.1002647","url":null,"abstract":"Channel impairments, such as multipath reflections, can have a profound impact on the bit error rate achievable in OFDM transmission applications. This paper presents a new channel equalisation technique that uses scattered pilots in OFDM symbols to estimate the delay parameters associated with a two-path model as an approximation of a multipath channel. It is applicable for both fixed and mobile reception. Results from simulation studies under multipath Rayleigh channel have shown that the algorithm can offer a substantial performance improvement over that obtained with a conventional linear interpolation approach, used as a benchmark. This is also confirmed by applying the algorithm to data recorded by an OFDM receiver in practical experiments that involved reception of five transmissions of OFDM symbols both 'off air' and through a channel simulator.","PeriodicalId":159750,"journal":{"name":"Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129736476","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
Very low complexity space-time decision feedback equalization of intersymbol interference on severe frequency-selective fading channels 严重频率选择性衰落信道中码间干扰的极低复杂度空时判决反馈均衡
Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367) Pub Date : 2002-08-07 DOI: 10.1109/VTC.2002.1002588
M. Kuhn, A. Wittneben
{"title":"Very low complexity space-time decision feedback equalization of intersymbol interference on severe frequency-selective fading channels","authors":"M. Kuhn, A. Wittneben","doi":"10.1109/VTC.2002.1002588","DOIUrl":"https://doi.org/10.1109/VTC.2002.1002588","url":null,"abstract":"Decision feedback equalization (DFE) and antenna diversity combining are two practical and well-known techniques for combating multipath ISI due to frequency-selective fading. We propose a scalable very low complexity combination of antenna combining and decision feedback equalization, which considers the characteristics of mobile communication channels. The performance of this new equalization method is compared to state-of-the-art equalizers by means of simulations. The complexity is evaluated by estimating the total computing expenditure. In addition a very efficient low-cost hardware structure for implementation is proposed. The algorithms are adapted for this hardware structure and the performance of this optimization is illustrated by simulation results.","PeriodicalId":159750,"journal":{"name":"Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367)","volume":"129 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124239797","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
Multiple quality control: a new framework for QoS control in forward link of 1/spl times/EV-DV systems 多重质量控制:1/ sp1次/EV-DV系统前向链路QoS控制的新框架
Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367) Pub Date : 2002-08-07 DOI: 10.1109/VTC.2002.1002797
Jeong-woo Cho, T. Kwon, Changhoi Koo, D. Park, Daegyun Kim, D. Cho
{"title":"Multiple quality control: a new framework for QoS control in forward link of 1/spl times/EV-DV systems","authors":"Jeong-woo Cho, T. Kwon, Changhoi Koo, D. Park, Daegyun Kim, D. Cho","doi":"10.1109/VTC.2002.1002797","DOIUrl":"https://doi.org/10.1109/VTC.2002.1002797","url":null,"abstract":"One of main issues in 1/spl times/EV-DV systems is how to support and satisfy various QoS requirements of data services and voice service simultaneously. Another main issue in 1/spl times/EV-DV systems is how to increase throughput of data services without sacrificing voice service QoS requirements. The main motivation for our proposed architecture, MQC (multiple quality control), is to use per-stream buffers in the physical layer and to fully utilize air resources. The problem of existing architectures is that PDUs from only one stream can be transmitted and those PDUs may not fill out the allocated time slots. In contrast to existing architectures, MQC can multiplex several streams into one PLP (physical layer packet) because MQC utilizes per-service buffers in the physical layer. We also introduce a multiplexing scheme that minimizes queueing delays of real-time traffic and maximizes cell throughputs.","PeriodicalId":159750,"journal":{"name":"Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367)","volume":"72 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123524745","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 simple iterative soft decoding algorithm for Reed-Solomon product codes Reed-Solomon产品码的简单迭代软译码算法
Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367) Pub Date : 2002-08-07 DOI: 10.1109/VTC.2002.1002878
Zongwang Li, L. Zeng, Wentao Song, Youyun Xu, Han-wen Luo
{"title":"A simple iterative soft decoding algorithm for Reed-Solomon product codes","authors":"Zongwang Li, L. Zeng, Wentao Song, Youyun Xu, Han-wen Luo","doi":"10.1109/VTC.2002.1002878","DOIUrl":"https://doi.org/10.1109/VTC.2002.1002878","url":null,"abstract":"We propose a novel iterative decoding algorithm based on partial combination of the parity check matrix for iterative soft decoding of Reed-Solomon product codes. It uses only the simple syndrome equations whose solutions are confined to parts of the columns of the parity check matrix. Compared to other algorithms, the proposed algorithm has lower complexity while offering better performance, which is demonstrated by simulations.","PeriodicalId":159750,"journal":{"name":"Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367)","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123630989","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
GSM and AMPS coexistence in the US cellular band GSM和AMPS在美国蜂窝频段共存
Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367) Pub Date : 2002-08-07 DOI: 10.1109/VTC.2002.1002969
Lichung Chu, Russel Fagg, T. Klingenbrunn, Lind Mortensen, B. Vejlgaard
{"title":"GSM and AMPS coexistence in the US cellular band","authors":"Lichung Chu, Russel Fagg, T. Klingenbrunn, Lind Mortensen, B. Vejlgaard","doi":"10.1109/VTC.2002.1002969","DOIUrl":"https://doi.org/10.1109/VTC.2002.1002969","url":null,"abstract":"When GSM at 850 MHz is deployed in the USA, it will have to coexist in the cellular band with AMPS. Previous studies have examined the coexistence of multiple standards in the US PCS band (see TR46 Telecommunications System Bulletin TSB-84A, 2001), but have not examined the coexistence between AMPS and GSM. This analysis focuses on the impact that coexistence has on radio receiver blocking and the second and third order intermodulation requirements. The paper concludes with an estimate of the outage probability in the GSM cell due to coexistence with AMPS. GSM and AMPS base station colocation and its impact on outage probability is also considered.","PeriodicalId":159750,"journal":{"name":"Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367)","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114318370","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
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