Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97最新文献_第9页

Quality of service and planning sensitivity evaluation for macrocellular mobile networks 宏蜂窝移动网络的服务质量和规划灵敏度评价

Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97 Pub Date : 1997-09-01 DOI: 10.1109/PIMRC.1997.630953

V. Koshi, D. Edwards, M. Mehler, C. Constantinou

引用次数: 0

A new multi-path vector channel simulator for the performance evaluation of antenna array systems 一种用于天线阵列系统性能评估的新型多径矢量信道模拟器

Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97 Pub Date : 1997-09-01 DOI: 10.1109/PIMRC.1997.627061

A. Stephenne, B. Champagne

引用次数: 10

Experimental evaluation of an adaptive antenna for a TDMA mobile telephony system TDMA移动电话系统自适应天线的实验评价

Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97 Pub Date : 1997-09-01 DOI: 10.1109/PIMRC.1997.624367

J. Strandell, M. Wennström, A. Rydberg, T. Öberg, O. Gladh, L. Rexberg, E. Sandberg, B. Andersson, Magnus Appelgren

引用次数: 17

WLL: wireless local loop-alternative technologies 无线本地环路替代技术

Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97 Pub Date : 1997-09-01 DOI: 10.1109/PIMRC.1997.631106

A. Noerpel

引用次数: 4

A distributed multicast routing protocol for ad-hoc (flat) mobile wireless networks 一种用于自组织(平面)移动无线网络的分布式多播路由协议

Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97 Pub Date : 1997-09-01 DOI: 10.1109/PIMRC.1997.627012

R. Bhattacharya, A. Ephremides

引用次数: 10

Soft-output equalization with TCM for wireless communications 无线通信用TCM软输出均衡

Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97 Pub Date : 1997-09-01 DOI: 10.1109/PIMRC.1997.630917

Yue Chen, K. Letaief, J. Chuang

引用次数: 2

Spreading sequences for zero-forcing DS-CDMA multiuser detectors 强制零DS-CDMA多用户检测器的扩频序列

Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97 Pub Date : 1997-09-01 DOI: 10.1109/PIMRC.1997.624362

H. Elders-Boll, A. Busboom, H. Schotten

{"title":"Spreading sequences for zero-forcing DS-CDMA multiuser detectors","authors":"H. Elders-Boll, A. Busboom, H. Schotten","doi":"10.1109/PIMRC.1997.624362","DOIUrl":"https://doi.org/10.1109/PIMRC.1997.624362","url":null,"abstract":"In the past, different multiuser detectors for asynchronous code-division multiple-access communications have been proposed, many of them may be characterized as zero-forcing detectors, e.g., the decorrelation detector. We show that linear interference cancellation schemes are asymptotically zero-forcing which means that they are equivalent to the decorrelating detector if the number of stages approaches infinity. These detectors have been found to be superior to the conventional matched filter detector. However, the design of spreading sequences optimized especially for these receivers has not been considered up to now. Usually, spreading sequences are designed to have a low peak correlation parameter. Pursley (1977) has shown that the average interference parameter (AIP) is an important design parameter since it is related to the average signal-to-interference ratio of the conventional receiver. In this paper, we consider the construction of spreading sequences for zero-forcing multiuser detectors that are optimal in the sense of performance and near-far resistance. It is shown that sequences with a low AIP are near-optimal. This, again, stresses the importance of the AIP for the design of spreading sequences for CDMA systems employing any kind of receiver. Numerical examples indicate that by using optimized sequences the average signal-to-noise ratio (SNR) can be improved by about 1-2 dB for lengths of interest in applications.","PeriodicalId":362340,"journal":{"name":"Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131092136","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: 19

Acquisition performance of Gold sequence based DS-CDMA systems 基于Gold序列的DS-CDMA系统的采集性能

Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97 Pub Date : 1997-09-01 DOI: 10.1109/PIMRC.1997.630933

Yong-Hwan Lee, Seung-Jun Kim

引用次数: 3

Capacity of co-existent cellular CDMA and GSM with shadowing and imperfect sectorization, power control and notch filtering 具有阴影和不完全分割、功率控制和陷波滤波的蜂窝CDMA和GSM共存的容量

Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97 Pub Date : 1997-09-01 DOI: 10.1109/PIMRC.1997.624357

D. Moelker, R. Prasad

{"title":"Capacity of co-existent cellular CDMA and GSM with shadowing and imperfect sectorization, power control and notch filtering","authors":"D. Moelker, R. Prasad","doi":"10.1109/PIMRC.1997.624357","DOIUrl":"https://doi.org/10.1109/PIMRC.1997.624357","url":null,"abstract":"Overlay of existing narrowband mobile communication systems with future wideband systems may improve spectrum efficiency and create the possibility for high-rate data services. This paper presents a generic capacity analysis applied to a GSM-CDMA overlay. The effects of shadowing and imperfect implementation of sectorization, power control and notch filtering are modeled for both uplink and downlink. Based on maximum allowable levels of mutual interference, the total system capacity is modeled and evaluated. Under moderate shadowing and perfect implementation of sectorization, power control and notch filtering, the results match those obtained in previous analyses by other authors, i.e., a capacity gain factor between 3 and 4. However, for low GSM margins in addition to imperfect sectorization, power control and notch filtering, the capacity gain is shown to reduce significantly. Particularly under heavy shadowing conditions, the overlay does not lead to capacity gain. The propagation loss factor and notch filtering are shown to have a large influence on the results. Provided almost perfect notch filtering and power control, the downlink performs slightly better than the uplink.","PeriodicalId":362340,"journal":{"name":"Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97","volume":"10 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134393192","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

Characterisation of the satellite-to-indoor channel based on narrow-band scalar measurements 基于窄带标量测量的星-户信道特性分析

Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97 Pub Date : 1997-09-01 DOI: 10.1109/PIMRC.1997.627039

B. Molnár, I. Frigyes, Z. Bodnar, Z. Herczku, Z. Kormányos, J. Berces, I. Papp, L. Juhász

引用次数: 4