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2009 IEEE 10th Annual Wireless and Microwave Technology Conference最新文献

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Indoor location estimation at mobile nodes based on angle-of-transmission 基于传输角的移动节点室内位置估计
2009 IEEE 10th Annual Wireless and Microwave Technology Conference Pub Date : 2009-04-20 DOI: 10.1109/WAMICON.2009.5207254
Wookwon Lee
{"title":"Indoor location estimation at mobile nodes based on angle-of-transmission","authors":"Wookwon Lee","doi":"10.1109/WAMICON.2009.5207254","DOIUrl":"https://doi.org/10.1109/WAMICON.2009.5207254","url":null,"abstract":"In this paper, a new approach to indoor positioning is introduced based on angle of transmission that can be estimated at a mobile node communicating with a fixed node equipped with an antenna array and transmitting a radiofrequency (RF) signature signal. With additional distance estimation at the mobile node based on RF signal strength of the signature signal, the proposed method is in essence the positioning of the mobile node to a point on the polar coordinate system. From computer simulation in additive white Gaussian noise and flat fading channels, the performance of the proposed approach is demonstrated.","PeriodicalId":132141,"journal":{"name":"2009 IEEE 10th Annual Wireless and Microwave Technology Conference","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121134635","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
Design of radio frequency passive polyphase filter for 2.4 GHz wireless communication applications 2.4 GHz无线通信中射频无源多相滤波器的设计
2009 IEEE 10th Annual Wireless and Microwave Technology Conference Pub Date : 2009-04-20 DOI: 10.1109/WAMICON.2009.5207298
F. Haddad, W. Rahajandraibe, L. Zaid, O. Frioui, R. Bouchakour
{"title":"Design of radio frequency passive polyphase filter for 2.4 GHz wireless communication applications","authors":"F. Haddad, W. Rahajandraibe, L. Zaid, O. Frioui, R. Bouchakour","doi":"10.1109/WAMICON.2009.5207298","DOIUrl":"https://doi.org/10.1109/WAMICON.2009.5207298","url":null,"abstract":"Polyphase filters are an efficient solution for high image rejection and great accuracy quadrature generation in radio frequency (RF) receivers. Analytical modeling of passive polyphase filter suitable for RF front-end applications operating in 2.4 GHz frequency band is dealt with. This analytical analysis has been used to calibrate the optimal values of passive components in order to obtain the maximum image rejection ratio (IRR). Component matching techniques has been taken into account during the layout process. Tunable RC polyphase network has been fabricated in 0.13-µm CMOS technology.","PeriodicalId":132141,"journal":{"name":"2009 IEEE 10th Annual Wireless and Microwave Technology Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124924697","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
A novel design procedure for tunable low noise amplifiers 一种新的可调谐低噪声放大器的设计方法
2009 IEEE 10th Annual Wireless and Microwave Technology Conference Pub Date : 2009-04-20 DOI: 10.1109/WAMICON.2009.5207313
M. B. Yelten, K. Gard
{"title":"A novel design procedure for tunable low noise amplifiers","authors":"M. B. Yelten, K. Gard","doi":"10.1109/WAMICON.2009.5207313","DOIUrl":"https://doi.org/10.1109/WAMICON.2009.5207313","url":null,"abstract":"A novel design methodology for tunable low noise amplifiers with the associated circuit topology will be presented. The procedure steps based on low noise design essentials are given as the main results of their mathematical analysis using the circuit and noise theory. After the methodology is demonstrated at narrowband by the simulation graphs, the tunability aspect of the design using the series matching at the input and output will be verified. If a tunable capacitor is inserted to the base of the heterojunction bipolar transistor (HBT) at the input, simulation outcomes reveal that for the range of 3.5– 6.5 GHz, input and output return ratios (S11 and S22) can be ensured to be below –10 dB and the difference between noise figure (NF) and minimum noise figure (NFMIN) to be below 0.5 dB.","PeriodicalId":132141,"journal":{"name":"2009 IEEE 10th Annual Wireless and Microwave Technology Conference","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116019840","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
Concurrent low cost multi-carrier compensation of amplitude and phase distortions in RF power amplifiers 射频功率放大器中幅度和相位畸变的低成本多载波同步补偿
2009 IEEE 10th Annual Wireless and Microwave Technology Conference Pub Date : 2009-04-20 DOI: 10.1109/WAMICON.2009.5207266
S. Devarakond, Shreyas Sen, A. Chaterjee
{"title":"Concurrent low cost multi-carrier compensation of amplitude and phase distortions in RF power amplifiers","authors":"S. Devarakond, Shreyas Sen, A. Chaterjee","doi":"10.1109/WAMICON.2009.5207266","DOIUrl":"https://doi.org/10.1109/WAMICON.2009.5207266","url":null,"abstract":"Distortion effects of wideband power amplifiers vary significantly with carrier frequency and need to be tested and characterized across a specified (wide) frequency range during production. In this paper, a low cost test approach is presented that allows AM-AM and AM-PM distortion effects of RF power amplifiers to be evaluated at multiple frequencies with a single multi-tone test. The response of the power amplifier is observed using a low cost envelope detector on the tester load board. The observed response is then used to determine the parameters of digital predistortion functions that allow accurate compensation of distortion effects at the relevant frequencies of interest. The predistortion functions are optimized using a twostep procedure that exhibits rapid convergence to the optimal function parameter values.","PeriodicalId":132141,"journal":{"name":"2009 IEEE 10th Annual Wireless and Microwave Technology Conference","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124758540","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
Performance analysis of persistent scheduling for VoIP in WiMAX networks WiMAX网络中VoIP持久调度的性能分析
2009 IEEE 10th Annual Wireless and Microwave Technology Conference Pub Date : 2009-04-20 DOI: 10.1109/WAMICON.2009.5207296
Shweta Shrivastava, R. Vannithamby
{"title":"Performance analysis of persistent scheduling for VoIP in WiMAX networks","authors":"Shweta Shrivastava, R. Vannithamby","doi":"10.1109/WAMICON.2009.5207296","DOIUrl":"https://doi.org/10.1109/WAMICON.2009.5207296","url":null,"abstract":"WiMAX networks based on Release 1.0 were known for efficient support of data traffic, but were considered inefficient for VoIP capacity, i.e. for supporting a large number of simultaneous VoIP users, due to large control overhead associated with VoIP. Persistent Scheduling is a mechanism that was adopted in Mobile WiMAX Release 1.5 to reduce MAP (control) overhead for VoIP traffic and improve VoIP capacity. This paper presents a performance analysis of persistent scheduling in WiMAX. Our simulation results show that persistent scheduling can increase VoIP Capacity by 15%.","PeriodicalId":132141,"journal":{"name":"2009 IEEE 10th Annual Wireless and Microwave Technology Conference","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121218507","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
A new design method for a dual-band power divider 一种新的双频功率分配器设计方法
2009 IEEE 10th Annual Wireless and Microwave Technology Conference Pub Date : 2009-04-20 DOI: 10.1109/WAMICON.2009.5207282
Kwisoo Kim, Daehoon Jang, Baatarkhuu Dorjsuren, Jongsik Lim, D. Ahn
{"title":"A new design method for a dual-band power divider","authors":"Kwisoo Kim, Daehoon Jang, Baatarkhuu Dorjsuren, Jongsik Lim, D. Ahn","doi":"10.1109/WAMICON.2009.5207282","DOIUrl":"https://doi.org/10.1109/WAMICON.2009.5207282","url":null,"abstract":"This paper presents a dual-band 2 section Wilkinson power divider. The proposed method is used that transmission lines of the divider are transformed to π-type equivalent circuits, which can be same impedance and electrical length. To validate the proposed method, we design a dual-band divider which is used for 0.9GHz cellular and 1.8GHz 3rd generation system. The specified dual-band divider which has 1:1 power division ratio at two bands is designed, fabricated and measured. The measured results show excellent performance with an insertion loss of less than 0.25dB, a return loss of less than 118.74dB, and good isolation characteristics.","PeriodicalId":132141,"journal":{"name":"2009 IEEE 10th Annual Wireless and Microwave Technology Conference","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130013179","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
Characterization of high-temperature ceramic materials at microwave frequencies for MEMS applications 用于MEMS应用的高温陶瓷材料的微波频率表征
2009 IEEE 10th Annual Wireless and Microwave Technology Conference Pub Date : 2009-04-20 DOI: 10.1109/WAMICON.2009.5207277
Xinhua Ren, T. Jiang, Yiguang Wang, L. An, X. Gong
{"title":"Characterization of high-temperature ceramic materials at microwave frequencies for MEMS applications","authors":"Xinhua Ren, T. Jiang, Yiguang Wang, L. An, X. Gong","doi":"10.1109/WAMICON.2009.5207277","DOIUrl":"https://doi.org/10.1109/WAMICON.2009.5207277","url":null,"abstract":"In this paper, the dielectric constant and loss tangent of two new high-temperature ceramic materials, SiCN and AlPO4, are characterized using a novel measurement technique at microwave frequencies with high accuracy. These ceramic materials exhibit high thermal stabilities and corrosion resistance, enabling their use for high-temperature sensing applications. The dielectric properties of these ceramic materials are critical parameters in order to develop high-temperature sensors for turbine engines. It is found that the dielectric constant and loss tangent of SiCN are 4.358 and 5.26 · 10−3, respectively. For AlPO4, the two parameters are 2.637 and 4.23 · 10−3, respectively. The standard deviation is less than 0.58% for the dielectric constant measurement and less than 5.72% for the loss tangent measurement, demonstrating excellent measurement repeatability.","PeriodicalId":132141,"journal":{"name":"2009 IEEE 10th Annual Wireless and Microwave Technology Conference","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134524407","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
Predictive traffic estimation for uplink resource allocation in satellite communications 卫星通信中上行资源分配的预测业务量估计
2009 IEEE 10th Annual Wireless and Microwave Technology Conference Pub Date : 2009-04-20 DOI: 10.1109/WAMICON.2009.5207304
B. B. Devi
{"title":"Predictive traffic estimation for uplink resource allocation in satellite communications","authors":"B. B. Devi","doi":"10.1109/WAMICON.2009.5207304","DOIUrl":"https://doi.org/10.1109/WAMICON.2009.5207304","url":null,"abstract":"In this paper, we propose a predictive traffic estimation strategy for the resource allocation to uplinks in the satellite communication. Estimating the traffic arriving during the next epoch is an important part of the Dynamic Bandwidth Resource Allocation (DBRA). Based on this estimate, the terminals request the bandwidth resources for transmission during the next epoch or next several epochs.","PeriodicalId":132141,"journal":{"name":"2009 IEEE 10th Annual Wireless and Microwave Technology Conference","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128810334","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
An analysis of uplink transmit power in WCDMA networks WCDMA网络中上行传输功率的分析
2009 IEEE 10th Annual Wireless and Microwave Technology Conference Pub Date : 2009-04-20 DOI: 10.1109/WAMICON.2009.5207283
Jeong Heon Lee, A. B. Raju, R. Buehrer
{"title":"An analysis of uplink transmit power in WCDMA networks","authors":"Jeong Heon Lee, A. B. Raju, R. Buehrer","doi":"10.1109/WAMICON.2009.5207283","DOIUrl":"https://doi.org/10.1109/WAMICON.2009.5207283","url":null,"abstract":"In this paper, we present an experimental analysis of uplink (UL) transmit power in WCDMA networks based on measurement data over a commercial UMTS network. In particular, three factors which may influence the transmit power profiles in practical mobile usage scenarios are examined: (a) handset position, (b) channel effects, and (c) network loading. First, a handset under test is placed at different positions relative to the body or nearby objects during peak and off-peak hours. Second, we study the relationship between the UL transmit power and received signal code power (RSCP) via a linear regression model. Then, the effect of network loading during three times of the day is examined for different areas and handset positions. Throughout this paper, measurement results of mean UL transmit power and RSCP along with their scatter plots are presented.","PeriodicalId":132141,"journal":{"name":"2009 IEEE 10th Annual Wireless and Microwave Technology Conference","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114620921","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
An overview of reconfigurable antennas: Design, simulation, and optimization 可重构天线概述:设计、仿真与优化
2009 IEEE 10th Annual Wireless and Microwave Technology Conference Pub Date : 2009-04-20 DOI: 10.1109/WAMICON.2009.5207264
Diego Langoni, M. Weatherspoon, E. Ogunti, S. Foo
{"title":"An overview of reconfigurable antennas: Design, simulation, and optimization","authors":"Diego Langoni, M. Weatherspoon, E. Ogunti, S. Foo","doi":"10.1109/WAMICON.2009.5207264","DOIUrl":"https://doi.org/10.1109/WAMICON.2009.5207264","url":null,"abstract":"Reconfigurable antenna implementation can be separated into three main processes: Antenna design, simulation, and optimization. The objective of this paper is to provide insight into the selections that must be made to implement a reconfigurable antenna, serving as a guideline for future reconfigurable antenna designers as to what needs to be done before a model is constructed, such as choosing a suitable antenna structure and reconfiguration technology, a proper simulation environment, and an adequate optimization algorithm that will allow smooth transitions between reconfigurable states. These selections are directly dependent on the given project requirements. Several options are presented for each case, and particular selections are made based on desired characteristics.","PeriodicalId":132141,"journal":{"name":"2009 IEEE 10th Annual Wireless and Microwave Technology Conference","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116176975","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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