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Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194)最新文献

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Advanced silicon IC interconnect technology: present trends and RF wireless implications 先进的硅集成电路互连技术:目前的趋势和射频无线影响
Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194) Pub Date : 1998-08-09 DOI: 10.1109/RAWCON.1998.709192
R. Gutmann
{"title":"Advanced silicon IC interconnect technology: present trends and RF wireless implications","authors":"R. Gutmann","doi":"10.1109/RAWCON.1998.709192","DOIUrl":"https://doi.org/10.1109/RAWCON.1998.709192","url":null,"abstract":"Back-end-of-the-line (BEOL) trends in silicon ICs include fully planarized interconnect structures with six levels on non-local wiring, copper metallization for improved resistance and electromigration and low dielectric constant (low-k) interlevel dielectrics (ILDs) for reduced line and coupling capacitance. These technological advances, when combined with front-end silicon technology innovations, will impact technology trends in RF wireless ICs and enhance the potential for systems-on-a-chip and application specific ICs (ASICs) with embedded communications capability. Design complexity will be alleviated by use of intellectual property (IP) cores and virtual design environment (VDE) software. Si IC BEOL trends are summarized, synergistic front-end developments discussed, implications for wireless technologies presented, the impacts of a VDE with IP cores discussed, and a timetable for practical realization in wireless products projected.","PeriodicalId":226788,"journal":{"name":"Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126168936","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
An improved 3-D ray tracing method for indoor propagation prediction 一种用于室内传播预测的改进三维射线追踪方法
Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194) Pub Date : 1998-08-09 DOI: 10.1109/RAWCON.1998.709146
W. Lu, K. Chan
{"title":"An improved 3-D ray tracing method for indoor propagation prediction","authors":"W. Lu, K. Chan","doi":"10.1109/RAWCON.1998.709146","DOIUrl":"https://doi.org/10.1109/RAWCON.1998.709146","url":null,"abstract":"The 3-D brute-force ray-tracing technique has been used extensively to predict indoor/outdoor radio propagation in mobile communication in recent year. This method produces accurate, deterministic channel models for wireless system design. It is also a powerful tool for propagation prediction in complex environments. However, a reception sphere has to be introduced to determine the rays that reach the receivers and the kinematic errors unavoidably occur. This paper presents a novel shooting and reception sphere technique which provides a much improved accuracy.","PeriodicalId":226788,"journal":{"name":"Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194)","volume":"9 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125342188","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
The use of arbitrary sequences for real-time wireless channel evaluation 利用任意序列进行实时无线信道评估
Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194) Pub Date : 1998-08-09 DOI: 10.1109/RAWCON.1998.709182
A. Al-Dabbagh, M. Darnell
{"title":"The use of arbitrary sequences for real-time wireless channel evaluation","authors":"A. Al-Dabbagh, M. Darnell","doi":"10.1109/RAWCON.1998.709182","DOIUrl":"https://doi.org/10.1109/RAWCON.1998.709182","url":null,"abstract":"The need for accurate channel measurements for broadband communication systems is well known. The problem of system identification constitutes the basis for any wireless channel measurement and estimation. The classical approach to system identification employs a pseudo-random (PR) sequence as a test signal. The system response to this PR sequence is then correlated with a replica of the test signal in order to obtain an estimate of the system impulse response. The fundamental assumption upon which this technique is based is that the PR test signal has an ideally impulsive autocorrelation function (ACF). In practice, the majority of sequences of interest do not possess this idealised ACF. The consequences of employing test signals with nonimpulsive ACF results in the introduction of estimation errors. The problem is further accentuated when the classical approach to system identification is applied to channel estimation. In this paper, the problem of system identification is analysed for the case when the ACF of the test signal is non-ideal. It is shown that the system impulse response estimation error can be reduced by using a compensation filter whose response has been related to the imperfection in the test signal ACF. The applicability of this approach to broadband channel estimation is then demonstrated.","PeriodicalId":226788,"journal":{"name":"Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114312156","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
Dynamic router configuration management for wireless mobile environments 无线移动环境的动态路由器配置管理
Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194) Pub Date : 1998-08-09 DOI: 10.1109/RAWCON.1998.709129
S. Ambardar, W. Lazear
{"title":"Dynamic router configuration management for wireless mobile environments","authors":"S. Ambardar, W. Lazear","doi":"10.1109/RAWCON.1998.709129","DOIUrl":"https://doi.org/10.1109/RAWCON.1998.709129","url":null,"abstract":"Manual router configuration can be a tedious and time consuming task that requires significant networking expertise, and does not scale well within the emerging digitized battlefield. The dynamic nature of tactical networks, and the potential for rapid changes, requires that new router configuration files be generated and loaded into fielded routers, quickly and efficiently, to support task reorganizations. This paper describes a proof-of-concept, rule set based, prototype tool built to convert graphical network topology representations into Cisco(R) router configuration files. Software \"agents\" tailor the configuration files and coordinate their distribution to the target routers via wireless links. The resulting ease of generating and implementing configuration files reduces dependence on highly skilled network design personnel, increases mission planning flexibility, and offers significant operational and cost benefits.","PeriodicalId":226788,"journal":{"name":"Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130312897","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
Beamforming applied to an adaptive planar array 波束形成应用于自适应平面阵列
Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194) Pub Date : 1998-08-09 DOI: 10.1109/RAWCON.1998.709173
A.M.G. Guerreiro, A. Neto, F.A. Lisboa
{"title":"Beamforming applied to an adaptive planar array","authors":"A.M.G. Guerreiro, A. Neto, F.A. Lisboa","doi":"10.1109/RAWCON.1998.709173","DOIUrl":"https://doi.org/10.1109/RAWCON.1998.709173","url":null,"abstract":"This paper presents algorithm to an adaptive array beamforming. The adaptive process is developed through a neural linear network based on the complex least mean square (LMS) algorithm. This study is developed for a planar antenna arrays.","PeriodicalId":226788,"journal":{"name":"Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123278148","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: 8
An examination of several large signal capacitance models to predict GaAs HEMT linear power amplifier performance 几种用于预测GaAs HEMT线性功率放大器性能的大信号电容模型的检验
Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194) Pub Date : 1998-08-09 DOI: 10.1109/RAWCON.1998.709207
J. Staudinger, M. de Baca, R. Vaitkus
{"title":"An examination of several large signal capacitance models to predict GaAs HEMT linear power amplifier performance","authors":"J. Staudinger, M. de Baca, R. Vaitkus","doi":"10.1109/RAWCON.1998.709207","DOIUrl":"https://doi.org/10.1109/RAWCON.1998.709207","url":null,"abstract":"This article examines several methods of modeling the charge/capacitance characteristics of GaAs HEMT devices for use in large signal models applied to the design and simulation of linear power amplifiers. Emphasis is placed on the effect these charge/capacitance models exhibit on the accuracy of the large signal model to predict linear power amplifier characteristics including gain, output power, efficiency, and linearity. Model predictions are contrasted to on-wafer load pull measurements made using a single-tone sinusoid, two-tone sinusoid, and a /spl pi//4 DQPSK stimuli compliant to the NADC standard. The results suggest the description of the device's charge/capacitance characteristics significantly effects large signal model accuracy.","PeriodicalId":226788,"journal":{"name":"Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127404073","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
A 85 Mbps low-power DQPSK modem-LSI for advanced wireless access 85mbps低功耗DQPSK调制解调器- lsi先进的无线接入
Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194) Pub Date : 1998-08-09 DOI: 10.1109/RAWCON.1998.709153
A. Yamagishi, M. Muraguchi, T. Tsukahara
{"title":"A 85 Mbps low-power DQPSK modem-LSI for advanced wireless access","authors":"A. Yamagishi, M. Muraguchi, T. Tsukahara","doi":"10.1109/RAWCON.1998.709153","DOIUrl":"https://doi.org/10.1109/RAWCON.1998.709153","url":null,"abstract":"A new differential quadrature phase shift keying modem-LSI uses differential mapping for modulation and baseband delay detector logic for demodulation. The LSI achieves a maximum bit rate of over 85 Mbps and low power dissipation of 67 mW at 80 Mbps with a 3-V power supply. We built an intermediate-frequency (IF)-part test circuit composed of the new modem-LSI, and did a transmission test at IF return. The C/N degradation of this circuit is about 1.7 dB at 75 Mbps.","PeriodicalId":226788,"journal":{"name":"Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126148696","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 embedded resistors for high frequency wireless applications 高频无线应用的嵌入式电阻器特性
Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194) Pub Date : 1998-08-09 DOI: 10.1109/RAWCON.1998.709150
N. Na, K. Choi, Madhavan Swaminathan
{"title":"Characterization of embedded resistors for high frequency wireless applications","authors":"N. Na, K. Choi, Madhavan Swaminathan","doi":"10.1109/RAWCON.1998.709150","DOIUrl":"https://doi.org/10.1109/RAWCON.1998.709150","url":null,"abstract":"This paper analyzes frequency and time domain response of embedded resistors in a multilayered structure using LTCC (low temperature co-fired ceramic) technology and discusses their effect on high frequency operation of mixed signal circuits using them. The results have been compared to TDR (time domain reflectometry) and TDT (time domain transmission) measurements using pulse propagation. Frequency-dependent parasitics are observed to be significant in embedded resistors from measurements and simulations. The importance of accurate modeling including frequency dependence and parasitics is emphasized in this paper for prediction of the frequency behavior of embedded resistors. Macromodels for resistor structures were developed and their simulation results show a good agreement with measurements. This paper also discusses a macromodeling approach that provides good correlation with measurements.","PeriodicalId":226788,"journal":{"name":"Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115968909","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: 6
BSIM3 MOSFET model accuracy for RF circuit simulation BSIM3 MOSFET模型精度的射频电路仿真
Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194) Pub Date : 1998-08-09 DOI: 10.1109/RAWCON.1998.709209
S. Tin, A. Osman, K. Mayaram, C. Hu
{"title":"BSIM3 MOSFET model accuracy for RF circuit simulation","authors":"S. Tin, A. Osman, K. Mayaram, C. Hu","doi":"10.1109/RAWCON.1998.709209","DOIUrl":"https://doi.org/10.1109/RAWCON.1998.709209","url":null,"abstract":"The accuracy of the BSIM3 MOSFET model for small-signal RF circuit simulation has been investigated for a 0.5 /spl mu/m CMOS process. Comparisons of the small signal y and s parameters for different bias conditions and channel lengths show that BSIM3 is reasonably well suited for small-signal analyses from 100 kHz up to 10 GHz.","PeriodicalId":226788,"journal":{"name":"Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130594658","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
Ultra high speed digital processing for wireless systems using passive microwave logic 使用无源微波逻辑的无线系统的超高速数字处理
Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194) Pub Date : 1998-08-09 DOI: 10.1109/RAWCON.1998.709132
B. Krishnamachari, S. Lok, C. Gracia, S. Abraham
{"title":"Ultra high speed digital processing for wireless systems using passive microwave logic","authors":"B. Krishnamachari, S. Lok, C. Gracia, S. Abraham","doi":"10.1109/RAWCON.1998.709132","DOIUrl":"https://doi.org/10.1109/RAWCON.1998.709132","url":null,"abstract":"This paper proposes two novel high-speed digital logic families that are implemented using passive microwave circuits. The proposed logic gates can process binary information represented in two high frequency carrier modulation formats-amplitude shift keying (ASK), and binary phase shift keying (BPSK). The fundamental logic gates (NOT, OR, AND) presented for both these data representations can process extremely high speed bit streams (1-100 Gbps). The combinational circuits formed from these passive logic gates can operate much faster than traditional electronic gates because they are not limited by the finite carrier mobility that is characteristic of semiconductors. Besides their higher operating speeds, these circuits are well suited for wireless communication systems because they process digital signals in a native high frequency transmission format and it is easy to integrate them with analog RF/microwave circuits.","PeriodicalId":226788,"journal":{"name":"Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129677499","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
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