2003 IEEE Topical Conference on Wireless Communication Technology最新文献_第9页

SMILE antenna arrays for wireless communication 用于无线通信的SMILE天线阵列

2003 IEEE Topical Conference on Wireless Communication Technology Pub Date : 2003-10-15 DOI: 10.1109/WCT.2003.1321572

Y. Wang, T. Itoh

引用次数: 0

Determination of a suitable macro-cell model for UMTS system in Istanbul 确定适合伊斯坦布尔UMTS系统的大细胞模型

2003 IEEE Topical Conference on Wireless Communication Technology Pub Date : 2003-10-15 DOI: 10.1109/WCT.2003.1321608

R. Ramiz, N. Buzcu

{"title":"Determination of a suitable macro-cell model for UMTS system in Istanbul","authors":"R. Ramiz, N. Buzcu","doi":"10.1109/WCT.2003.1321608","DOIUrl":"https://doi.org/10.1109/WCT.2003.1321608","url":null,"abstract":"Macro-cells are large areas with transmitter antennas well above the surrounding buildings and usually there is no direct visibility between the transmitter and the receiver (NLOS). For this purpose, in general, path loss models which consider uniform environmental characteristics are used, as well as the those that are suitable for homogenous urban environments. Istanbul has a complex geographical structure, and is established on seven hills and divided by the Bosphorus. Many old and new buildings with different height and size are located side by side, and there are various types of roads with random shapes and directions. Also, as Istanbul is not a flat area, the most commonly used macro-cell path loss models for GSM 900/1800 are not one to one applicable to UMTS systems. We define different macro-cell propagation models for each MS to MS, BS to MS, BS to BS, MS to BS communications case where the-buildings are assumed to be nearly uniform height, to ensure an efficient UMTS system. In order to improve the system performance, the most appropriate measurement procedure and measurement criteria are examined, as well as filtering intervals in association with handover mechanisms.","PeriodicalId":6305,"journal":{"name":"2003 IEEE Topical Conference on Wireless Communication Technology","volume":"12 1","pages":"469-470"},"PeriodicalIF":0.0,"publicationDate":"2003-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86595855","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 mutual coupling model for MIMO systems MIMO系统的相互耦合模型

2003 IEEE Topical Conference on Wireless Communication Technology Pub Date : 2003-10-15 DOI: 10.1109/WCT.2003.1321534

M. K. Ozdemir, H. Arslan, E. Arvas

{"title":"A mutual coupling model for MIMO systems","authors":"M. K. Ozdemir, H. Arslan, E. Arvas","doi":"10.1109/WCT.2003.1321534","DOIUrl":"https://doi.org/10.1109/WCT.2003.1321534","url":null,"abstract":"Wireless communication systems employing multielement antennas (MEAs) are affected by mutual coupling. Accurate and simple models of mutual coupling are essential for better system analysis. In a MEA, mutual coupling depends on the antenna element separation, geometry of array and antenna elements, location of antenna elements in the array, frequency, substrate thickness and constant, near-field scatterers, and direction of arrival (DOA) of the incoming wave. Except near-field scatterers and DOA, the rest of the parameters are fixed for a given MEA system. Since the feeding network for a MIMO system is fixed and most of the mutual coupling is due to surface waves, DOA dependency can be removed for a MIMO mutual coupling model. In this paper, a previously proposed model for mutual coupling is modified to be applicable to MIMO systems. The effect of near-field scatterers on the mutual coupling is specifically investigated to validate the model. Commercially available EM simulators are utilized for this purpose. Once the effect of near-field scatterers is characterized, correlation properties between antenna elements in a MEA can be obtained more accurately and correlation estimation algorithms can be developed accordingly.","PeriodicalId":6305,"journal":{"name":"2003 IEEE Topical Conference on Wireless Communication Technology","volume":"83 1","pages":"306-307"},"PeriodicalIF":0.0,"publicationDate":"2003-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88108301","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: 16

Multivalued transmission system for UWB-CDMA using modified Hermite pulse shape 基于改进埃尔米特脉冲形状的UWB-CDMA多值传输系统

2003 IEEE Topical Conference on Wireless Communication Technology Pub Date : 2003-10-15 DOI: 10.1109/WCT.2003.1321599

H. Harada, T. Sato, R. Kohno

{"title":"Multivalued transmission system for UWB-CDMA using modified Hermite pulse shape","authors":"H. Harada, T. Sato, R. Kohno","doi":"10.1109/WCT.2003.1321599","DOIUrl":"https://doi.org/10.1109/WCT.2003.1321599","url":null,"abstract":"Recently, a lot of attention has been paid to ultra wideband (UWB) wireless communications systems due to its potential to reach data rate in wireless communications. A UWB signal is defined as that whose bandwidth either surpasses 25% of its spectrum's center frequency or exceeds 1.5 GHz. The UWB communication systems is often referred to as impulse radio since such ultra wideband signal is composed of sub-nanosecond pulses. In addition to possibly enabling the implementation of high-speed wireless access with over 1 Gbit/s data-rules, UWB systems also have the potential to simplify the RF circuitry of the transceivers and lower the transmit power. Previous UWB-IR system proposals have used trains of Gaussian pulses at transmission, resulting, at the receiver. in waveforms known as the monocycle. In those schemes, a number of pulses are needed to transmit 1 bit of information. In this work, a system that transmits several bits per pulse, aimed at enhancing data rate, is studied. The pulse shape used on the UWB system is also studied. UWB pulses based on modified Hermite polynomials (MHP) have been proposed before. These pulses are orthogonal at the transmitter, but not at the receiver due to the differentiation effect of both transmit and receive antenna.","PeriodicalId":6305,"journal":{"name":"2003 IEEE Topical Conference on Wireless Communication Technology","volume":"81 1","pages":"451-452"},"PeriodicalIF":0.0,"publicationDate":"2003-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89616267","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

Research trend of millimeter-wave systems and technologies at Communication Research Laboratory 通信研究实验室毫米波系统与技术的研究趋势

2003 IEEE Topical Conference on Wireless Communication Technology Pub Date : 2003-10-15 DOI: 10.1109/WCT.2003.1321413

H. Ogawa

引用次数: 1

Turbo-coded ARQ scheme for a CDMA packet radio system CDMA分组无线电系统的turbo编码ARQ方案

2003 IEEE Topical Conference on Wireless Communication Technology Pub Date : 2003-10-15 DOI: 10.1109/WCT.2003.1321453

J. Kim

引用次数: 0

An interdisciplinary effort to develop a wireless embedded sensor system to monitor and assess corrosion in the tendons of prestressed concrete girders 一个跨学科的努力，开发无线嵌入式传感器系统，以监测和评估预应力混凝土梁的肌腱腐蚀

2003 IEEE Topical Conference on Wireless Communication Technology Pub Date : 2003-10-15 DOI: 10.1109/WCT.2003.1321506

J. Bernhard, K. Hietpas, E. George, D. Kuchima, H. Reis

引用次数: 53

Early detection of mentally retarded children by displaying face images using Bluetooth wireless technology 通过蓝牙无线技术显示面部图像，早期发现智障儿童

2003 IEEE Topical Conference on Wireless Communication Technology Pub Date : 2003-10-15 DOI: 10.1109/WCT.2003.1321493

R. Kirana, A. Sugiura

引用次数: 1

Historical review of reflector antenna systems developed by MELCO 新濠天地公司研制的反射面天线系统历史回顾

2003 IEEE Topical Conference on Wireless Communication Technology Pub Date : 2003-10-15 DOI: 10.1109/WCT.2003.1321415

S. Makino

引用次数: 2

Performance bounds and measurements for AC-coupled direct-conversion transceivers under the presence of 1/f noise 1/f噪声下交流耦合直接转换收发器的性能界限和测量

2003 IEEE Topical Conference on Wireless Communication Technology Pub Date : 2003-10-15 DOI: 10.1109/WCT.2003.1321429

A. Georgiadis, R. Point

引用次数: 1