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ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384)最新文献

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Uplink-downlink imbalance in TDMA personal communication systems TDMA个人通信系统的上行链路和下行链路不平衡
ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384) Pub Date : 1998-10-05 DOI: 10.1109/ICUPC.1998.732820
A. Lozano, Donald Co, Cox, Terry R Bourk
{"title":"Uplink-downlink imbalance in TDMA personal communication systems","authors":"A. Lozano, Donald Co, Cox, Terry R Bourk","doi":"10.1109/ICUPC.1998.732820","DOIUrl":"https://doi.org/10.1109/ICUPC.1998.732820","url":null,"abstract":"An important aspect of any channel assignment algorithm should be balancing the performance of uplink and downlink. Differences in receiver performance, diversity and transmit power used at mobiles and base stations are potential sources of imbalance. In addition, there is a fundamental asymmetry between uplink and downlink interference caused by the locations of mobiles and base stations. We investigate the nature of this asymmetry and prove that the uplink frequently has worse interference. Furthermore, this difference shows little dependence on the degree of mobility and is basically associated with the location of mobiles rather than their speed.","PeriodicalId":341069,"journal":{"name":"ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130175822","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: 27
A communicating scheme for adaptive resource allocation in wireless networks 一种无线网络中自适应资源分配的通信方案
ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384) Pub Date : 1998-10-05 DOI: 10.1109/ICUPC.1998.732807
K. Al Agha, D. Zeghlache
{"title":"A communicating scheme for adaptive resource allocation in wireless networks","authors":"K. Al Agha, D. Zeghlache","doi":"10.1109/ICUPC.1998.732807","DOIUrl":"https://doi.org/10.1109/ICUPC.1998.732807","url":null,"abstract":"To achieve the best possible bandwidth utilization in wireless networks adaptive resource assignment is a requirement. Distributed or centralized resource allocation schemes can be used to reach such an objective. However, the means to actually implement these resource adaptive features represent a major implementation challenge. In addition, the schemes should be self adaptive and eventually self learning since large scale traffic variations on an hourly and a daily basis exhibit patterns with low expected variance. At a much finer scale, in micro and pico cellular environments variations due to user mobility are unpredictable and only dynamic channel allocation methods can adequately adapt to the rather large traffic variations. This contribution relates to the larger scale traffic variations and proposes an adaptive resource assignment approach based on the multi-agent technique which relies on self learning. The adaptive resource allocation scheme \"channel segregation (CS)\" containing inherently the self learning attribute was selected to test and validate the concept of using intelligent agents in base stations. Using the multi-agent platform DIMA (development and implementation of multi agent system), CS has been integrated and implemented in a simulation model of base stations to introduce the self learning feature in the network. The obtained simulation results validate the intelligent agent implementation and illustrate the feasibility of using such agents in base stations to introduce the self adaptive feature in mobile networks.","PeriodicalId":341069,"journal":{"name":"ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384)","volume":"123 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114225621","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
Power division multiple access 分路多址
ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384) Pub Date : 1998-10-05 DOI: 10.1109/ICUPC.1998.733033
G. Mazzini
{"title":"Power division multiple access","authors":"G. Mazzini","doi":"10.1109/ICUPC.1998.733033","DOIUrl":"https://doi.org/10.1109/ICUPC.1998.733033","url":null,"abstract":"This paper presents and analyzes a new multiple access scheme, which is power diversity based, for an asynchronous environment. The key idea is to have different received power for each user in order to permit successive reception based on cochannel interference cancellation. No other kinds of diversity are considered in order to keep the system complexity low and to focus the attention on the power division access theory. Furthermore, all users access the same band at the same time without a code signature.","PeriodicalId":341069,"journal":{"name":"ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384)","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114855925","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: 15
COMETS experiments for Ka-band and millimeter-wave advanced mobile satellite communications 用于ka波段和毫米波先进移动卫星通信的COMETS实验
ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384) Pub Date : 1998-10-05 DOI: 10.1109/ICUPC.1998.733047
H. Wakana, H. Saito, S. Yamamoto, Huan-Bang Li, M. Tanaka
{"title":"COMETS experiments for Ka-band and millimeter-wave advanced mobile satellite communications","authors":"H. Wakana, H. Saito, S. Yamamoto, Huan-Bang Li, M. Tanaka","doi":"10.1109/ICUPC.1998.733047","DOIUrl":"https://doi.org/10.1109/ICUPC.1998.733047","url":null,"abstract":"We present the Communications and Broadcasting Engineering Test Satellite (COMETS) payload configuration and experimental systems for the Ka-band and millimeter-wave mobile satellite communications as well as the developed ground terminals. The COMETS carries multibeam antennas, an SCPC/TDM regenerative transponder, and LF filter matrices for direct mobile-to-mobile communications and interconnection between multibeams. For mobile terminals, several antennas such as an active phased array antenna, a torus-reflector antenna, and a waveguide slot array antenna were developed. For personal satellite communications, a Ka-band portable terminal, which can achieve direct user-to-user communications using the on-board regenerative transponder, was developed.","PeriodicalId":341069,"journal":{"name":"ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129403952","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
Site selection transmission power control in DS-CDMA cellular downlink DS-CDMA蜂窝下行链路的选址传输功率控制
ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384) Pub Date : 1998-10-05 DOI: 10.1109/ICUPC.1998.733654
H. Furukawa
{"title":"Site selection transmission power control in DS-CDMA cellular downlink","authors":"H. Furukawa","doi":"10.1109/ICUPC.1998.733654","DOIUrl":"https://doi.org/10.1109/ICUPC.1998.733654","url":null,"abstract":"This paper proposes a new closed loop form of downlink transmission power control (TPC) which can resolve the interference increase problem due to multiple site transmission during soft hand-over (SHO). In the proposed method, base stations (BSs) connecting to a mobile station (MS) with non-minimum path loss reduce their power gradually to reach a minimum level. A BS with a minimum path loss in the active set, on the other hand, controls its own power to keep the signal quality received in the MS at a constant level. The BS selection is carried out using the TPC signal derived as a fine combination of power-up/power-down signal and a primary BS identification number. The capacity of the proposed TPC is compared with other TPC methods including a conventional one in which the power of BSs in the same active set is equally controlled. The simulations indicate that the capacity of the proposed TPC is higher than that of the conventional TPC and it is comparable with that of an ideal instantaneous hard hand-over system.","PeriodicalId":341069,"journal":{"name":"ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129380466","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
A block-error simulator for mobile channels based on non-linear chaos equations 基于非线性混沌方程的移动信道块误差模拟器
ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384) Pub Date : 1998-10-05 DOI: 10.1109/ICUPC.1998.732831
E. Costamagna, L. Favalli, P. Gamba, P. Savazzi
{"title":"A block-error simulator for mobile channels based on non-linear chaos equations","authors":"E. Costamagna, L. Favalli, P. Gamba, P. Savazzi","doi":"10.1109/ICUPC.1998.732831","DOIUrl":"https://doi.org/10.1109/ICUPC.1998.732831","url":null,"abstract":"This work introduces a novel approach to model mobile channels (in particular, DECT ones) by means of non-linear equations based on the chaos theory. A simple procedure to extract meaningful statistics, well matched with those obtained by a standard generative model is presented. The proposed \"chaotic\" approach seems to be sufficiently powerful to let one model by means of quasi-deterministic equations the apparently random behavior of block errors in digital transmission over mobile channels. Two numerical experiments supporting the idea are shown and discussed.","PeriodicalId":341069,"journal":{"name":"ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130214900","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
Design and implementation of data-link control protocol for CBR traffic in wireless ATM networks 无线ATM网络中CBR业务数据链路控制协议的设计与实现
ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384) Pub Date : 1998-10-05 DOI: 10.1109/ICUPC.1998.733630
S. K. Biswas, H.C. Kim, P. Narasimhan, R. Siracusa, C. Johnston
{"title":"Design and implementation of data-link control protocol for CBR traffic in wireless ATM networks","authors":"S. K. Biswas, H.C. Kim, P. Narasimhan, R. Siracusa, C. Johnston","doi":"10.1109/ICUPC.1998.733630","DOIUrl":"https://doi.org/10.1109/ICUPC.1998.733630","url":null,"abstract":"This paper presents a data link control (DLC) framework for transporting constant bit rate (CBR) traffic over wireless ATM links. The purpose of DLC in wireless is to provide error-free services to the higher layers by recovering corrupted cells. A selective reject (SREJ) automatic repeat request (ARQ) based DLC protocol is used for CBR error recovery. For an ARQ based scheme, higher recovery rates can be achieved with larger cell transfer delay, caused by cell retransmissions. Since cell transfer delay and DLC recovery rate both can translate to user-perceivable quality of service (QoS), it is important for the DLC to strike a balance between these two, depending on the application's requirements. To achieve this in our protocol, the retransmission procedure for a CBR cell is constrained to complete within a recovery time interval which is specified by the application at call-setup time. Also, a novel jitter removal algorithm, which reduces the cell delay variation caused by cell loss and retransmissions, is incorporated as a part of the DLC protocol. The proposed protocol is implemented on NEC's WATMnet prototype system. The implementation and its experimental results are reported for illustrating the performance and feasibility of the presented CBR DLC protocol. The experimental results show that the DLC protocol can be successfully applied for error recovery of CBR traffic on a per-connection basis. These also indicate that the DLC can be programmed to attain a desirable tradeoff between cell transfer delay and cell recovery rate.","PeriodicalId":341069,"journal":{"name":"ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128792832","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
Performance of multi-carrier CDMA with iterative detection 基于迭代检测的多载波CDMA性能研究
ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384) Pub Date : 1998-10-05 DOI: 10.1109/ICUPC.1998.732817
M. Akther, J. Asenstorfer, P. Alexander, M. Reed
{"title":"Performance of multi-carrier CDMA with iterative detection","authors":"M. Akther, J. Asenstorfer, P. Alexander, M. Reed","doi":"10.1109/ICUPC.1998.732817","DOIUrl":"https://doi.org/10.1109/ICUPC.1998.732817","url":null,"abstract":"We consider a matrix algebraic approach to describe the multi-carrier CDMA (MC-CDMA) system with forward error control coding. We consider the uplink of a mobile communications system and derive the frequency selective channel model and show its similarity with the DS-CDMA channel. We therefore take advantage of a previously published technique that combines iterative decoding and interference cancellation to reduce the multiuser interference (MUI) present in the system and show that the performance approaches single user performance even for moderate signal to noise ratios.","PeriodicalId":341069,"journal":{"name":"ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128877481","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: 18
Efficient DFE initialization for high speed wireless LAN 高效的DFE初始化高速无线局域网
ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384) Pub Date : 1998-10-05 DOI: 10.1109/ICUPC.1998.733060
D. Raphaeli
{"title":"Efficient DFE initialization for high speed wireless LAN","authors":"D. Raphaeli","doi":"10.1109/ICUPC.1998.733060","DOIUrl":"https://doi.org/10.1109/ICUPC.1998.733060","url":null,"abstract":"A very efficient procedure is introduced for computing the DFE coefficients for wireless packet type modems. The technique is especially suited for hardware VLSI implementation. After the channel impulse response is estimated using a short preamble, the Gauss-Siedel iterative algorithm is efficiently used to compute the DFE coefficients. The algorithm is derived and results are shown for both for QPSK and for GMSK modulations on indoor multipath channels.","PeriodicalId":341069,"journal":{"name":"ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127826302","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
A controlled distributed antenna system for increasing capacity in the DS-CDMA system 一种用于增加DS-CDMA系统容量的可控分布式天线系统
ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384) Pub Date : 1998-10-05 DOI: 10.1109/ICUPC.1998.733002
J.H. Lee, J. Roh, J. Kwun, C. Kang
{"title":"A controlled distributed antenna system for increasing capacity in the DS-CDMA system","authors":"J.H. Lee, J. Roh, J. Kwun, C. Kang","doi":"10.1109/ICUPC.1998.733002","DOIUrl":"https://doi.org/10.1109/ICUPC.1998.733002","url":null,"abstract":"We consider the simulcasting system using distributed antennas in the DS-CDMA system. The simulcasting system in which the same signal is broadcast simultaneously by distributed antenna ports in a cell can reduce both the blocking probability of a call in a shadowing region and the handoff attempt rate. We propose a controlled distributed antenna system to improve the Eb/Io in both links of the DS-CDMA simulcasting system. It is shown by simulation that improvement in the forward link Eb/Io can be achieved if the ERPs of those ports located far from the considered mobile are reduced to eliminate unwanted interference to other mobiles. It is also shown that the reverse link Eb/Io can be improved by selection diversity combining.","PeriodicalId":341069,"journal":{"name":"ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130501565","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
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