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Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573)最新文献

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An ultra low voltage 2.4GHz CMOS VCO 超低电压2.4GHz CMOS压控振荡器
Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573) Pub Date : 2002-11-07 DOI: 10.1109/RAWCON.2002.1030153
N. Troedsson, H. Sjoland
{"title":"An ultra low voltage 2.4GHz CMOS VCO","authors":"N. Troedsson, H. Sjoland","doi":"10.1109/RAWCON.2002.1030153","DOIUrl":"https://doi.org/10.1109/RAWCON.2002.1030153","url":null,"abstract":"A 2.4 GHz voltage controlled oscillator (VCO) with very low supply voltage is presented. The oscillator works at just 100 mV above the threshold voltage while fulfilling the phase noise requirements of Bluetooth. The very low supply voltage is achieved by replacing the current-source typically used with an inductor at the source node, thereby eliminating the DC-voltage drop. The oscillator measures a timing range of 13%, a current consumption of 2.8 mA, and a phase noise of -130 dBc/Hz at 3 MHz offset from the carrier frequency for a 0.7 V supply.","PeriodicalId":132092,"journal":{"name":"Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132001254","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: 21
Design of directional couplers using multilayer thick-film technology 多层厚膜定向耦合器的设计
Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573) Pub Date : 2002-11-07 DOI: 10.1109/RAWCON.2002.1030167
Z. Tian, C. Free, C. Aitchison, P. Barnwell, J. Wood
{"title":"Design of directional couplers using multilayer thick-film technology","authors":"Z. Tian, C. Free, C. Aitchison, P. Barnwell, J. Wood","doi":"10.1109/RAWCON.2002.1030167","DOIUrl":"https://doi.org/10.1109/RAWCON.2002.1030167","url":null,"abstract":"The performance of multilayer directional couplers using a range of different thick-film dielectrics has been investigated. The properties of multilayer coupled lines are examined using their coupled-mode parameters. It is found that the optimum performance of multilayer directional couplers is largely affected by the thick-film dielectric used. A practical design strategy for multilayer directional couplers is developed, which overcomes the problem of excessive computation that is normally associated with the optimization of multilayer circuit designs. The methodology has been verified through the design and measurement of wide bandwidth 2 dB and 3 dB directional couplers that were fabricated using multilayer thick-film technology.","PeriodicalId":132092,"journal":{"name":"Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573)","volume":"145 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132198569","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
An improved characterization method for the dielectric properties of RFIC encapsulating plastics 一种改进的RFIC封装塑料介电性能表征方法
Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573) Pub Date : 2002-11-07 DOI: 10.1109/RAWCON.2002.1030151
D. Jessie, L. Larson
{"title":"An improved characterization method for the dielectric properties of RFIC encapsulating plastics","authors":"D. Jessie, L. Larson","doi":"10.1109/RAWCON.2002.1030151","DOIUrl":"https://doi.org/10.1109/RAWCON.2002.1030151","url":null,"abstract":"A new method has been developed to measure the relative dielectric constant and loss tangent of encapsulating plastic typically used in RFIC package applications. Measured resonances in a rectangular cavity are electromagnetically simulated to obtain the electronic properties of a dielectric material. The advantage of this method is that expensive fixturing is not required, and the electronic properties at any resonance frequency can be obtained.","PeriodicalId":132092,"journal":{"name":"Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122059814","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
A low-complexity robust bearing estimator using reparameterization and covariance match for the distributed source 一种基于重参数化和协方差匹配的低复杂度鲁棒分布源轴承估计方法
Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573) Pub Date : 2002-11-07 DOI: 10.1109/RAWCON.2002.1030115
Shenjian Liu, Q. Wan, Yingning Peng
{"title":"A low-complexity robust bearing estimator using reparameterization and covariance match for the distributed source","authors":"Shenjian Liu, Q. Wan, Yingning Peng","doi":"10.1109/RAWCON.2002.1030115","DOIUrl":"https://doi.org/10.1109/RAWCON.2002.1030115","url":null,"abstract":"Many methods were proposed to estimate the bearing of a spatially distributed source. They usually suffer from heavy computational load and are limited to small angle spread due to model approximated error. In this paper, the two problems are considered and the main contribution is two-fold. First, the unimodal symmetric space frequency distribution is introduced to describe the source model. The exact expression of the covariance matrix can be calculated without model approximation even in the case of a large angular spread. Second, using reparameterization and covariance match criteria, a novel estimator is proposed by solving a nonlinear least-square problem in the central space frequency. It can be implemented only by a FFT or a one-dimension search. Numerical examples show its robustness for the large angular spread. A statistical analysis is also included to show the asymptotic efficiency of the bearing estimate.","PeriodicalId":132092,"journal":{"name":"Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573)","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127186125","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 strong coupled microstrip ring resonator using linearly tapered feedlines for bandpass filter applications 采用线性锥形馈线的强耦合微带环形谐振器，用于带通滤波器应用
Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573) Pub Date : 2002-11-07 DOI: 10.1109/RAWCON.2002.1030122
Sang‐Min Han, Young-Sik Kim
{"title":"A strong coupled microstrip ring resonator using linearly tapered feedlines for bandpass filter applications","authors":"Sang‐Min Han, Young-Sik Kim","doi":"10.1109/RAWCON.2002.1030122","DOIUrl":"https://doi.org/10.1109/RAWCON.2002.1030122","url":null,"abstract":"A new feedline using linearly tapered microstrip lines to a microstrip ring resonator is proposed. The circular and rectangular resonators with the new feedlines have been simulated and implemented. The results show that the optimum feedline length is about /spl lambda//sub g//2 and the feeding angle trades off between the insertion loss and the fractional bandwidth. The insertion loss of the proposed one is enhanced by more than about 7 dB compared with the conventional one. The design of the bandpass filter using the new proposed feedline is presented.","PeriodicalId":132092,"journal":{"name":"Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128851816","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 fully integrated GSM/DCS/PCS Rx VCO with fast switching auto-band selection 完全集成的GSM/DCS/PCS Rx VCO，具有快速切换自动频段选择功能
Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573) Pub Date : 2002-11-07 DOI: 10.1109/RAWCON.2002.1030154
Dawn Wang, Xudong Wang, A. Eshraghi, Danny Chang, P. Bacon
{"title":"A fully integrated GSM/DCS/PCS Rx VCO with fast switching auto-band selection","authors":"Dawn Wang, Xudong Wang, A. Eshraghi, Danny Chang, P. Bacon","doi":"10.1109/RAWCON.2002.1030154","DOIUrl":"https://doi.org/10.1109/RAWCON.2002.1030154","url":null,"abstract":"A fully integrated VCO suited for GSM/DCS/PCS tri-band direct conversion receiver is designed and fabricated in 0.5 pn IBM Si- BiCMOS technology. The VCO has achieved a phase noise of -143 dBclHz at 3MHz offset with a frequency of 3.4GHz and more than 600MHz bandwidth. The design of the fast switching auto-band selection circuit is also discussed. The total current for VCO is 10 mA with a 2.8V supply.","PeriodicalId":132092,"journal":{"name":"Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573)","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123124042","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: 22
Re-configurable multi-standard terminal for heterogeneous networks 异构网络可重构多标准终端
Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573) Pub Date : 2002-11-07 DOI: 10.1109/RAWCON.2002.1030109
J. Brakensiek, B. Oelkrug, M. Bucker, D. Uffmann, A. Droge
{"title":"Re-configurable multi-standard terminal for heterogeneous networks","authors":"J. Brakensiek, B. Oelkrug, M. Bucker, D. Uffmann, A. Droge","doi":"10.1109/RAWCON.2002.1030109","DOIUrl":"https://doi.org/10.1109/RAWCON.2002.1030109","url":null,"abstract":"The next generation of mobile communication systems will lead to an integration of existing networks and access technologies, forming a heterogeneous network. New architectures are needed to serve new requirements from these new systems. The paper highlights the requirements of a reconfigurable multi-standard terminal from the physical-layer point of view. A reconfigurable architecture consisting of algorithm domain specific accelerators, allowing autonomous complex digital signal processing without interference from a microprocessor or digital signal processor, is explained. Performance comparison numbers with the latest digital signal processors show the effectiveness of the proposed architecture.","PeriodicalId":132092,"journal":{"name":"Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128177717","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
Hairpin-shaped step-impedance slip-ring filters 发夹形阶跃阻抗滑环滤波器
Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573) Pub Date : 2002-11-07 DOI: 10.1109/RAWCON.2002.1030165
The-Nan Chang, Jin-Hau Li
{"title":"Hairpin-shaped step-impedance slip-ring filters","authors":"The-Nan Chang, Jin-Hau Li","doi":"10.1109/RAWCON.2002.1030165","DOIUrl":"https://doi.org/10.1109/RAWCON.2002.1030165","url":null,"abstract":"In this paper; compact .filters composed of hairpin-shaped step-impedance slip-ring resonators (SISRs) are presented. Two configurations were studied. One is used to implement a four-pole quasi-elliptic function band-pass .filter. Tlze other one is constructed by eliminating the cross coupling path .from the ,first one. Compared with the traditional open loop square resonator; there is a 2046 reduction in length for each side. Besides that, the spurious mode is moved to higher frequencies. .","PeriodicalId":132092,"journal":{"name":"Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114641804","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 enhanced linear amplification with non-linear component (ELINC) system 增强型线性放大非线性元件(ELINC)系统
Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573) Pub Date : 2002-11-07 DOI: 10.1109/RAWCON.2002.1030145
Jian Gu
{"title":"An enhanced linear amplification with non-linear component (ELINC) system","authors":"Jian Gu","doi":"10.1109/RAWCON.2002.1030145","DOIUrl":"https://doi.org/10.1109/RAWCON.2002.1030145","url":null,"abstract":"An enhanced linear amplification with non-linear component (ELINC) system has been presented. The ELINC system can achieve both better modulation accuracy and out-of-band spectral performances over a conventional LINC system, without physically adjusting the branches' conditions. The gain mismatch between the two amplification branches results in a \"dead circle\" centered at null. The \"dead circle\" encloses those signal points that cannot be represented by sum or the two branch signals with any possible phase difference. The mismatch also introduces some phase skew to the resulting signal. The ELINC system can remove the phase skew and have higher tolerance to the adverse effects of the \"dead circle\". Furthermore, if a third branch signal is introduced then any linear modulated signal can be represented without a \"dead circle\".","PeriodicalId":132092,"journal":{"name":"Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129654937","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
On the backhaul efficiency of 3G CDMA radio access network 3G CDMA无线接入网回程效率研究
Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573) Pub Date : 2002-11-07 DOI: 10.1109/RAWCON.2002.1030104
D.T. Chen, I. Vukovic
{"title":"On the backhaul efficiency of 3G CDMA radio access network","authors":"D.T. Chen, I. Vukovic","doi":"10.1109/RAWCON.2002.1030104","DOIUrl":"https://doi.org/10.1109/RAWCON.2002.1030104","url":null,"abstract":"The recurring operating costs of backhaul links are of key concern to cellular service providers. Backhaul are the links (or trunks) that connect base stations to the base station controller (BSC) in the central office. One of the driving forces to migrate from 2G to 3G RAN (radio access networks) is to maximize the backhaul efficiency by adopting packet-switched technology. The maximum number of calls a backhaul link can support is called the backhaul efficiency. Two major technologies, ATM (specifically, AAL2) and IP, are the main streams offered in 3G. We compare the backhaul efficiency of these two technologies with 2G circuit-switched backhaul efficiency. QoS associated with the 3G AAL2/IP backhaul is also considered.","PeriodicalId":132092,"journal":{"name":"Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128682927","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
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