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IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)最新文献

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Blind rate detection algorithm in W-CDMA mobile receiver W-CDMA移动接收机盲速率检测算法
IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.956466
I. Sohn, Seoyoung Lee
{"title":"Blind rate detection algorithm in W-CDMA mobile receiver","authors":"I. Sohn, Seoyoung Lee","doi":"10.1109/VTC.2001.956466","DOIUrl":"https://doi.org/10.1109/VTC.2001.956466","url":null,"abstract":"One of the key technologies introduced in the W-CDMA system is blind rate detection in the multi-rate service environment. One such detection scheme, the blind transport format detection (BTFD) scheme, is studied. From the performance study of FER (frame error rate) and FDR (false detection rate), it was found that the performance of BTFD without transmission rate information was almost equal to that of detection with a priori transmission rate information in W-CDMA system.","PeriodicalId":129008,"journal":{"name":"IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132635927","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
Turbo trellis-coded modulation with time varying mixed mapping 时变混合映射的Turbo栅格编码调制
IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.957181
E. Onggosanusi, A. Gatherer, A. Dabak
{"title":"Turbo trellis-coded modulation with time varying mixed mapping","authors":"E. Onggosanusi, A. Gatherer, A. Dabak","doi":"10.1109/VTC.2001.957181","DOIUrl":"https://doi.org/10.1109/VTC.2001.957181","url":null,"abstract":"We describe a technique to control the trade-off between the error floor and the waterfall performance of parallel concatenated trellis-coded. modulation (PCTCM), which is also known as turbo TCM, via the choice of coded-bits-to-signal mapping for a fixed component code. We demonstrate that different choice of mapping leads to different error floor and waterfall performance. One mapping may have the lowest error floor but result in poor waterfall performance, while another mapping may achieve the opposite. We then present the time-varying mixed mapping scheme for PCTCM systems. The proposed mixed mapping scheme enables us to generate a set of turbo trellis codes from two choices of coded-bits-to-signal mapping with various waterfall performance and error floor.","PeriodicalId":129008,"journal":{"name":"IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)","volume":"133 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130905962","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
Experimental performance of methods to estimate the location of legacy handsets in GSM GSM中遗留手机位置估计方法的实验性能
IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.957254
M. Spirito, Sami Pöykkö, O. Knuuttila
{"title":"Experimental performance of methods to estimate the location of legacy handsets in GSM","authors":"M. Spirito, Sami Pöykkö, O. Knuuttila","doi":"10.1109/VTC.2001.957254","DOIUrl":"https://doi.org/10.1109/VTC.2001.957254","url":null,"abstract":"This paper focuses on the location estimation of legacy GSM (Global System for Mobile communications) handsets. Three network-based software location methods using CI (cell identity), TA (timing advance), and RXLEV (received signal strength) information available in GSM are presented and their implementation is discussed. Experimental performance of the methods in a commercial GSM network is presented and a comparative analysis is carried out. It is shown that the location error of the most accurate method tends to scale according to the average cell size.","PeriodicalId":129008,"journal":{"name":"IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130971590","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: 42
Feedback parallel interference cancellation system using turbo code 采用turbo码的反馈并行干扰抵消系统
IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.956447
D. Takeda, T. Wakutsu, M. Serizawa
{"title":"Feedback parallel interference cancellation system using turbo code","authors":"D. Takeda, T. Wakutsu, M. Serizawa","doi":"10.1109/VTC.2001.956447","DOIUrl":"https://doi.org/10.1109/VTC.2001.956447","url":null,"abstract":"In this paper, a parallel interference cancellation system using turbo codes is proposed. In general, canceller systems suffer from errors in the initial decision and those errors cause performance degradation. We use turbo decoding in the initial decision in order to remove the errors. Moreover, we aim to improve the performance by feedback of the signal after cancellation. The proposed system has two types of feedback: iteration of the turbo decoder and feedback after cancellation. We evaluate the BER performance of the proposed system and the optimal number of both iterations and feedback. As a result of the computer simulation, the BER performance of the proposed system greatly improved and was superior to the conventional cancellation system.","PeriodicalId":129008,"journal":{"name":"IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131087760","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
Nonrearrangeable compact assignment of orthogonal variable- spreading factor codes for multi-rate traffic 多速率业务中正交可变扩频因子码的不可重排紧凑分配
IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.956911
Yang Yang, T. Yum
{"title":"Nonrearrangeable compact assignment of orthogonal variable- spreading factor codes for multi-rate traffic","authors":"Yang Yang, T. Yum","doi":"10.1109/VTC.2001.956911","DOIUrl":"https://doi.org/10.1109/VTC.2001.956911","url":null,"abstract":"In UTRA systems, orthogonal variable-spreading-factor (OVSF) codes are used to support different transmission rates for different users. In this paper, we first define an index for measuring the flexibility of an assignable code set. Based on this flexibility index, a single-code assignment scheme, namely nonrearrangeable compact assignment (NCA), is proposed for accommodating multi-rate traffic. NCA can offer maximal flexibility to the resulting assignable code set after each code assignment. As a result, it gives better blocking, throughput and fairness performance when compared to random assignment (RA) scheme.","PeriodicalId":129008,"journal":{"name":"IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)","volume":"299 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133304854","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: 28
Performance analysis of data transmission in W-CDMA system W-CDMA系统数据传输性能分析
IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.956465
Uooyeol Yoon, Seongsoo Park, P. S. Min
{"title":"Performance analysis of data transmission in W-CDMA system","authors":"Uooyeol Yoon, Seongsoo Park, P. S. Min","doi":"10.1109/VTC.2001.956465","DOIUrl":"https://doi.org/10.1109/VTC.2001.956465","url":null,"abstract":"We analyze the performance of multiple rejects (MR) ARQ for RLC (radio link control) proposed by 3GPP. The main purpose of MR ARQ is to get efficient use of radio resources at receiver by reducing number of acknowledgements. We analyze MR ARQ and compare its performance with selective repeat (SR) ARQ in the wireless fading channel environment. Based on mathematical analysis and simulation, it is shown that we need to increase the size of buffer for MR ARQ to hold data packets for the period of acknowledgement, and need to increase the size of buffer much more for MR ARQ in the noisier channel environment. It is shown that as the length of period for acknowledgement is increased, we need to increase the size of buffer much more for the saturated throughput. Increasing the size of buffer is needed for the efficient use of radio resources by reducing the number of acknowledgements. Also, the increased delay is another tradeoff.","PeriodicalId":129008,"journal":{"name":"IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132286150","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
Applying mobile IP over wireless ATM communication networks 在无线ATM通信网络上应用移动IP
IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.957214
J. Soldatos, D. Vergados, N. Protopsaltis, C. Lykou, G. Kormentzas, C. Anagnostopoulos, M. Theologou
{"title":"Applying mobile IP over wireless ATM communication networks","authors":"J. Soldatos, D. Vergados, N. Protopsaltis, C. Lykou, G. Kormentzas, C. Anagnostopoulos, M. Theologou","doi":"10.1109/VTC.2001.957214","DOIUrl":"https://doi.org/10.1109/VTC.2001.957214","url":null,"abstract":"Advances in mobile devices' and networks' technology have set a challenging pace for all new proposals in the rapidly growing domain of mobile communications. The decade of the 90's brought a revolution in mobile computing. The explosion in sales of laptop PCs as well as personal digital assistants and cellular phones has marked the beginning of a new era in the users'/consumers' needs and demands from the network providers. Users of today opt not only for voice and multimedia applications but also for mobility. It is evident that high-speed wireless networks like WATM together with the use of IP are becoming more than an in vitro area of research.","PeriodicalId":129008,"journal":{"name":"IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127398862","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
Traffic demand characterization for multimedia mobile networks 多媒体移动网络的流量需求表征
IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.956844
L. Ribeiro, L. Dasilva
{"title":"Traffic demand characterization for multimedia mobile networks","authors":"L. Ribeiro, L. Dasilva","doi":"10.1109/VTC.2001.956844","DOIUrl":"https://doi.org/10.1109/VTC.2001.956844","url":null,"abstract":"We discuss theoretical and practical aspects related to the dimensioning of hybrid traffic (voice and data) for mobile wireless networks such as the third-generation (3G) systems. The major aspect looked at is the user profile description, with characterization of the main metrics and models that describe the user's voice and data demand. The user profile leads to discussion of the asymmetric nature of the subscriber, which has direct implications on how the network links are designed in order to provide balanced spectrum distribution between downlink and uplink. Next we present a practical approach to explore the dynamics of user geographical distribution in creating multi-service, multi-class traffic layers that serve as input for network traffic simulation algorithms.","PeriodicalId":129008,"journal":{"name":"IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115406863","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 evaluation of DOA based beamforming in W-CDMA system 基于DOA的W-CDMA系统波束形成性能评价
IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.957233
S. Jeng, Chia-Yuan Huang, Chih-Yang Lai, Tswen-Jiann Huang
{"title":"Performance evaluation of DOA based beamforming in W-CDMA system","authors":"S. Jeng, Chia-Yuan Huang, Chih-Yang Lai, Tswen-Jiann Huang","doi":"10.1109/VTC.2001.957233","DOIUrl":"https://doi.org/10.1109/VTC.2001.957233","url":null,"abstract":"In wireless communications, a smart antenna system utilizes an antenna array to acquire the spatial signatures of the transmitted signals and uses the difference of the spatial signatures or the direction of arrival (DOA) of signals to correctly obtain the desired signal. This can reduce co-channel interference, mitigate the fading phenomenon caused by the multipath transmission, increase the system capacity and improve the communication quality. The purpose of this paper is to study the performance of the smart antenna DOA based beamforming algorithm applied to a wideband code division multiple access (W-CDMA) system. The simulation results show that a W-CDMA system with smart antenna, compared with that with an omnidirectional antenna, can have a lower bit error rate at the specific signal to noise ratio (SNR), allow more users to access the system at the specific bit error rate and increase the system capacity.","PeriodicalId":129008,"journal":{"name":"IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115549735","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
Novel fast fading compensator for OFDM using space diversity with space-domain interpolator 基于空间分集和空域插值的OFDM快速衰落补偿器
IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.956645
H. Takayanagi, M. Okada, Heiichi Yamamoto
{"title":"Novel fast fading compensator for OFDM using space diversity with space-domain interpolator","authors":"H. Takayanagi, M. Okada, Heiichi Yamamoto","doi":"10.1109/VTC.2001.956645","DOIUrl":"https://doi.org/10.1109/VTC.2001.956645","url":null,"abstract":"This paper proposes a novel space diversity assisted OFDM receiver with Doppler spread compensator. A linear array antenna is set up on the vehicle. The proposed compensator estimates the received signal at the point that does not move with respect to the ground during the observation period. Computer simulation results show that the proposed scheme can mitigate the performance degradation due to Doppler spread.","PeriodicalId":129008,"journal":{"name":"IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)","volume":"146 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115740316","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
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