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1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest最新文献

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Aperture jitter in IF sampling CDMA receivers 中频采样CDMA接收机的孔径抖动
1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest Pub Date : 1997-02-23 DOI: 10.1109/MTTTWA.1997.595114
S. Mollenkopf
{"title":"Aperture jitter in IF sampling CDMA receivers","authors":"S. Mollenkopf","doi":"10.1109/MTTTWA.1997.595114","DOIUrl":"https://doi.org/10.1109/MTTTWA.1997.595114","url":null,"abstract":"A method is described for quantifying the signal-to-noise ratio degradation due to aperture jitter in IF sampling receivers given the statistics of the input signal. In the absence of such an analysis, aperture jitter is often incorrectly specified. The emphasis is placed on CDMA receivers using automatic gain control, but the method is also applicable to FDMA technologies. Results presented may be used to specify aperture jitter in receivers utilizing the IF sampling topology.","PeriodicalId":264044,"journal":{"name":"1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127222966","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
A detailed analysis of MMDS and LMDS 详细分析了MMDS和LMDS
1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest Pub Date : 1997-02-23 DOI: 10.1109/MTTTWA.1997.595099
H. Graves
{"title":"A detailed analysis of MMDS and LMDS","authors":"H. Graves","doi":"10.1109/MTTTWA.1997.595099","DOIUrl":"https://doi.org/10.1109/MTTTWA.1997.595099","url":null,"abstract":"The Local Multipoint Distribution System (LMDS) and Multichannel Multipoint Distribution System (MMDS) are the regulatory acronyms given to the 28 GHz and 2.5 GHz transmission bands in many jurisdictions around the world. Each of these bands have associated technical and application parameters that will have a profound affect on the quickly converging markets. This article addresses the technical issues associated with these bands and examines the application environment for these systems. The primary technical focus of equipment vendors for both of these bands has to be the network design and the way that the networks can be constructed to provide ubiquitous service to customers. As such there are a number of technical parameters that affect the design of the system including signal propagation characteristics, carrier energy levels, modulation schemes, error detection and correction mechanisms, and interference isolation requirements. The technical issues tie directly into operating issues such as coverage area, reliability, capacity, and the general feature/benefit relationship required for any successful system.","PeriodicalId":264044,"journal":{"name":"1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest","volume":"158 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116232941","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
Hinged, polarization diverse WLAN antenna 铰链式极化多样化WLAN天线
1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest Pub Date : 1997-02-23 DOI: 10.1109/MTTTWA.1997.595109
M. Russell, J. Preiss, S. Donaldson, F. Beltrán, Á. Marinilli
{"title":"Hinged, polarization diverse WLAN antenna","authors":"M. Russell, J. Preiss, S. Donaldson, F. Beltrán, Á. Marinilli","doi":"10.1109/MTTTWA.1997.595109","DOIUrl":"https://doi.org/10.1109/MTTTWA.1997.595109","url":null,"abstract":"To fully realize the system potential of wireless local area networks (WLAN), polarization diverse antennas must be employed to minimize fading and optimize performance in dynamic, complex electromagnetic environments. An antenna solution that is integral to a WLAN PCMCIA card has been developed, demonstrated and the results presented here.","PeriodicalId":264044,"journal":{"name":"1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122763747","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
Design of an active microstrip array using a microwave circuit simulator 利用微波电路模拟器设计有源微带阵列
1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest Pub Date : 1997-02-23 DOI: 10.1109/MTTTWA.1997.595121
S. Demir, C. Toker, A. Hizal
{"title":"Design of an active microstrip array using a microwave circuit simulator","authors":"S. Demir, C. Toker, A. Hizal","doi":"10.1109/MTTTWA.1997.595121","DOIUrl":"https://doi.org/10.1109/MTTTWA.1997.595121","url":null,"abstract":"An active antenna array design and simulation of this design with a microwave circuit simulator are presented. This active antenna array is a TV receive only (TVRO) antenna operating at 10 GHz. It is a 8/spl times/4 array of rectangular microstrip patch antennas. Eight low noise pHEMTs are placed in the antenna. Passive antenna characteristics are usually obtained by analytical techniques or using special softwares for this purpose. The numerical representation as well as the nonreciprocal nature of the active device necessitates the use of a circuit simulator. In this work, both the antenna and the active circuit characteristics are obtained in the same medium, using microwave circuit simulator LIBRA. The array structure is simulated with LIBRA for gain, noise temperature, radiation pattern, directivity and bandwidth.","PeriodicalId":264044,"journal":{"name":"1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133367744","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 SAW shaping filter for high data rate MSK-encoding in a broadband DS-CDMA system 宽带DS-CDMA系统中用于高数据速率msk编码的SAW整形滤波器
1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest Pub Date : 1997-02-23 DOI: 10.1109/MTTTWA.1997.595128
A. Zenzinger, F. Morhart, L. Reindl, R. Weigel
{"title":"A SAW shaping filter for high data rate MSK-encoding in a broadband DS-CDMA system","authors":"A. Zenzinger, F. Morhart, L. Reindl, R. Weigel","doi":"10.1109/MTTTWA.1997.595128","DOIUrl":"https://doi.org/10.1109/MTTTWA.1997.595128","url":null,"abstract":"We report on two surface acoustic wave (SAW) shaping filters which generate a minimum shift keying (MSK) modulated signal by converting a BPSK modulated signal. The filters are intended to be used for modulators with high data rates, as it is necessary in broadband direct sequence code division multiple access (DS-CDMA) systems. One filter has been fabricated from a lithium tantalate (LiTaO/sub 3/) substrate, and one from a quartz substrate. The filter on LiTaO/sub 3/ fulfills all requirements dealing with spectrum shaping. However, the temperature range is not as wide as with quartz substrates due to the higher temperature coefficient of LiTaO/sub 3/. The filter on quartz is very stable from the temperature coefficient point of view, but the insertion attenuation and spurious electromagnetic feedthrough are relatively high.","PeriodicalId":264044,"journal":{"name":"1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124109070","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
Broadband wireless technology employment in Canada 宽带无线技术在加拿大的就业
1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest Pub Date : 1997-02-23 DOI: 10.1109/MTTTWA.1997.595098
B. Evans
{"title":"Broadband wireless technology employment in Canada","authors":"B. Evans","doi":"10.1109/MTTTWA.1997.595098","DOIUrl":"https://doi.org/10.1109/MTTTWA.1997.595098","url":null,"abstract":"Summary form only given, as follows. Canada has been aggressive in allocating frequency bands throughout the spectrum, from 2.5 GHz to 40 GHz, for the provision of terrestrial, wireless, broadband broadcasting and telecommunications services for both urban and rural applications-to compete with the conventional telephone, cable television and satellite infrastructures. This article overviews the technology and applications associated with a portfolio of some eight different bands allocated for various services, presenting the relative performance and economics of the spectrum alternatives and underlining the technical constraints associated with the higher frequency alternatives. The focus on provision of broadband services, employment of compression techniques for video transmission is outlined-with service capacities compared between the low and high frequency ends of the spectrum. Particular attention is focused on the new Local Multipoint Communications Service alternatives, with the equipment development and economic challenges associated with LMCS being presented.","PeriodicalId":264044,"journal":{"name":"1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132910624","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
The effect of harmonic load terminations on RF power amplifier linearity for sinusoidal and /spl pi//4 DQPSK stimuli 正弦和/spl pi//4 DQPSK激励下谐波负载终止对射频功率放大器线性度的影响
1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest Pub Date : 1997-02-23 DOI: 10.1109/MTTTWA.1997.595104
J. Staudinger, G. Norris
{"title":"The effect of harmonic load terminations on RF power amplifier linearity for sinusoidal and /spl pi//4 DQPSK stimuli","authors":"J. Staudinger, G. Norris","doi":"10.1109/MTTTWA.1997.595104","DOIUrl":"https://doi.org/10.1109/MTTTWA.1997.595104","url":null,"abstract":"The effect of harmonic load terminations on the linearity of a GaAs MESFET power amplifier is examined for both sinusoidal and /spl pi//4 DQPSK stimuli. A large signal model is utilized with harmonic balance and envelope simulation methods to predict distortion performance of a GaAs MESFET based RF power amplifier targeting domestic TDMA cellular radio handset applications. The simulation techniques and large signal model are first validated by comparing load pull distortion measurements arising from both sinusoidal and digitally modulated RF stimuli to simulation. Excellent agreement between measurement and simulation is observed for a wide range of load line conductances. The effect of harmonic terminations on amplifier linearity is then investigated using simulation methods. The results suggest significant linearity improvements are possible with proper harmonic terminations.","PeriodicalId":264044,"journal":{"name":"1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127747316","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
Even-order distortion enveloping method to linearize saturated high power amplifiers 饱和大功率放大器线性化的偶阶失真包络法
1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest Pub Date : 1997-02-23 DOI: 10.1109/MTTTWA.1997.595116
K. Horikawa, H. Ogawa
{"title":"Even-order distortion enveloping method to linearize saturated high power amplifiers","authors":"K. Horikawa, H. Ogawa","doi":"10.1109/MTTTWA.1997.595116","DOIUrl":"https://doi.org/10.1109/MTTTWA.1997.595116","url":null,"abstract":"A new linearizer concept is proposed. The proposed linearizer generates even-order distortion in a frequency band different from the transmission band. This linearizer can control the distortion independently of the incident signals and compensate an almost saturated HPA. The output backoff is improved by about 1 dB which means a power efficiency improvement of about 5%.","PeriodicalId":264044,"journal":{"name":"1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest","volume":"295 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125837894","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
A low cost amplifier design technique for wireless applications 用于无线应用的低成本放大器设计技术
1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest Pub Date : 1997-02-23 DOI: 10.1109/MTTTWA.1997.595117
M. L. Edwards, R. Roddewig, Sheng Cheng
{"title":"A low cost amplifier design technique for wireless applications","authors":"M. L. Edwards, R. Roddewig, Sheng Cheng","doi":"10.1109/MTTTWA.1997.595117","DOIUrl":"https://doi.org/10.1109/MTTTWA.1997.595117","url":null,"abstract":"Conditionally stable amplifiers can be an attractive design option for wireless applications where the potential for enhanced gain can translate into reduced cost of RF parts. Such an approach is illustrated for a 2.4 GHz wireless local area network (WLAN) application where device cost is reduced an order of magnitude.","PeriodicalId":264044,"journal":{"name":"1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest","volume":"132 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127348844","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
Subscriber unit transmitter power amplifier prototype and simulation for personal access communications system (PACS) 个人接入通信系统(PACS)的用户单元发射机功率放大器原型与仿真
1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest Pub Date : 1997-02-23 DOI: 10.1109/MTTTWA.1997.595127
H. Izadpanah, R. Malkemes, R. Cordell, P. Grabbe, D. Chukurov
{"title":"Subscriber unit transmitter power amplifier prototype and simulation for personal access communications system (PACS)","authors":"H. Izadpanah, R. Malkemes, R. Cordell, P. Grabbe, D. Chukurov","doi":"10.1109/MTTTWA.1997.595127","DOIUrl":"https://doi.org/10.1109/MTTTWA.1997.595127","url":null,"abstract":"We present design and simulation results on a PACS subscriber unit prototype transmitter RF power amplifier, the effect of amplifier nonlinearity on the emission spectra, and the optimization of amplifier power added efficiency over the amplifier power control range. The amplifier gain, the P1-dB compression point, and the third order intercept point responsible for the adjacent channel spectral regrowth are investigated.","PeriodicalId":264044,"journal":{"name":"1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114658904","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
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