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MILCOM 1986 - IEEE Military Communications Conference: Communications-Computers: Teamed for the 90's最新文献

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Simulation of Adaptive Antennas in a Spread Spectrum Communications Environment 扩频通信环境下自适应天线的仿真
MILCOM 1986 - IEEE Military Communications Conference: Communications-Computers: Teamed for the 90's Pub Date : 1986-10-01 DOI: 10.1109/MILCOM.1986.4805821
Todd K. Citron, C. Light
{"title":"Simulation of Adaptive Antennas in a Spread Spectrum Communications Environment","authors":"Todd K. Citron, C. Light","doi":"10.1109/MILCOM.1986.4805821","DOIUrl":"https://doi.org/10.1109/MILCOM.1986.4805821","url":null,"abstract":"At high data rates, the advantages of spread spectrum techniques for protection against interference are reduced; however, adaptive antennas can be used to improve performance by placing nulls in the direction of the interference. Unfortunately, the design of adaptive antennas is complicated by the wide bandwidths required for spread spectrum systems. This paper describes two software tools, AAP and SYSTID, for analyzing adaptive arrays that greatly simplify the design process. AAP can be used to generate steady-state performance. The SYSTID simulation can be used to investigate transient effects including, component nonlinearities and frequency dependencies. Two simulation examples are presented to demonstrate the versatility of the software.","PeriodicalId":126184,"journal":{"name":"MILCOM 1986 - IEEE Military Communications Conference: Communications-Computers: Teamed for the 90's","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123410860","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 Dynamic Code Division Multiple Access Algorithm for Time Acquisition of FH-MFSK Satellite Communication Systems 一种用于FH-MFSK卫星通信系统时采集的动态码分多址算法
MILCOM 1986 - IEEE Military Communications Conference: Communications-Computers: Teamed for the 90's Pub Date : 1986-10-01 DOI: 10.1109/MILCOM.1986.4805700
T. Seay, M. Blanco
{"title":"A Dynamic Code Division Multiple Access Algorithm for Time Acquisition of FH-MFSK Satellite Communication Systems","authors":"T. Seay, M. Blanco","doi":"10.1109/MILCOM.1986.4805700","DOIUrl":"https://doi.org/10.1109/MILCOM.1986.4805700","url":null,"abstract":"A code division multiple-access (CDMA) algorithm is presented for uplink coarse time acquisition for satellite communication systems which use frequency-hopped M-ary FSK signalling with onboard processing. The algorithm is based on self-probing, and it allows independent acquisition by large numbers of users on a multiple access basis. This new algorithm is extremely fast under light loading conditions when compared to the typical approach. Also, it is very efficient compared to perfect preassignment over the full range of loading conditions from light to very heavy loading. The algorithm requires minimal processing by one user and no coordinated action by other users, and it is highly resistant to degradation by downlink channel errors or fading. The performance is evaluated by analysis and verified through Monte Carlo simulations.","PeriodicalId":126184,"journal":{"name":"MILCOM 1986 - IEEE Military Communications Conference: Communications-Computers: Teamed for the 90's","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126323735","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
Experimental Results on the Cross-Coupled Phase-Locked Loop Interference Canceller with Closed Loop Amplitude Control 闭环幅度控制交叉耦合锁相环干扰消除器的实验结果
MILCOM 1986 - IEEE Military Communications Conference: Communications-Computers: Teamed for the 90's Pub Date : 1986-10-01 DOI: 10.1109/MILCOM.1986.4805862
Sabit Say, F. Cassara
{"title":"Experimental Results on the Cross-Coupled Phase-Locked Loop Interference Canceller with Closed Loop Amplitude Control","authors":"Sabit Say, F. Cassara","doi":"10.1109/MILCOM.1986.4805862","DOIUrl":"https://doi.org/10.1109/MILCOM.1986.4805862","url":null,"abstract":"Experimental results demonstrating practical performance capabilities and limitations on the cross-coupled phase-locked loop (CCPLL) interference canceller with closed loop amplitude control are presented. Hardware was designed and constructed to demonstrate its potential in suppressing CW, AM. FM. AM/FM and pulsed RF interference. Practical rules of design are also advanced. In addition to the experimental study. computer aided analysis of the defining set of coupled nonlinear differential equations was also conducted to derive \"stability regions\" which reveal the range of loop parameters over which successful cancellation of the interferer and demodulation of the desired signal can be assured.","PeriodicalId":126184,"journal":{"name":"MILCOM 1986 - IEEE Military Communications Conference: Communications-Computers: Teamed for the 90's","volume":"217 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115072590","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
Perspectives on Distributed Network Protocols: A Case for Building Blocks 分布式网络协议的观点:构建模块的案例
MILCOM 1986 - IEEE Military Communications Conference: Communications-Computers: Teamed for the 90's Pub Date : 1986-10-01 DOI: 10.1109/MILCOM.1986.4805648
E. Gafni
{"title":"Perspectives on Distributed Network Protocols: A Case for Building Blocks","authors":"E. Gafni","doi":"10.1109/MILCOM.1986.4805648","DOIUrl":"https://doi.org/10.1109/MILCOM.1986.4805648","url":null,"abstract":"Although it is common practice to design large systems by decomposition, it does not seem to be the case in the design of \"small\" distributed protocols, especially when the network is assumed reliable. Many such protocols share common features, yet are designed and proved as isolated cases, which makes them difficult to understand and even more difficult to validate. In this paper, a building-block approach to the design of distributed protocols is advocated. We take a few simple and rather basic protocols proposed by various researchers, and assert that these protocols are suitable to serve as building blocks. We then go through the exercise of designing several protocols employing these building blocks. We illustrate how such a design can lead to better understanding and clarity of the protocols, and even to improvement in performance.","PeriodicalId":126184,"journal":{"name":"MILCOM 1986 - IEEE Military Communications Conference: Communications-Computers: Teamed for the 90's","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130670474","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: 27
On Multi-Hop Spread Spectrum Network Modeling 多跳扩频网络建模研究
MILCOM 1986 - IEEE Military Communications Conference: Communications-Computers: Teamed for the 90's Pub Date : 1986-10-01 DOI: 10.1109/MILCOM.1986.4805761
E. Sousa, J. Silvester
{"title":"On Multi-Hop Spread Spectrum Network Modeling","authors":"E. Sousa, J. Silvester","doi":"10.1109/MILCOM.1986.4805761","DOIUrl":"https://doi.org/10.1109/MILCOM.1986.4805761","url":null,"abstract":"This paper is concerned with the graphical modeling of multi-hop spread spectrum packet radio networks. We show various network graphs, obtained using a graphics program, that illustrate typical connectivities that may be achieved for nominal values of the processing gain. The effects of the propagation power loss function and terminal transmission probability are also displayed. We introduce the notion of a soft link where the number of links included in the network depends on a link quality parameter.","PeriodicalId":126184,"journal":{"name":"MILCOM 1986 - IEEE Military Communications Conference: Communications-Computers: Teamed for the 90's","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133308897","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
Use of High-Performance Workstations in Military Communications and ADP/Network Experiments 高性能工作站在军事通信和ADP/网络实验中的应用
MILCOM 1986 - IEEE Military Communications Conference: Communications-Computers: Teamed for the 90's Pub Date : 1986-10-01 DOI: 10.1109/MILCOM.1986.4805673
Louis C. Schreier
{"title":"Use of High-Performance Workstations in Military Communications and ADP/Network Experiments","authors":"Louis C. Schreier","doi":"10.1109/MILCOM.1986.4805673","DOIUrl":"https://doi.org/10.1109/MILCOM.1986.4805673","url":null,"abstract":"Advances in high-performance computer workstation technology make it possible to merge traditionally distinct communications and automatic data processing functions into an integrated terminal device. The ADDCOMPE program has used these state-of-the-art, high-performance workstations to support distributed command, control, and communication (C3) in an active Army Testbed. These workstations are internetworked to provide a distributed processing and communications environment that forms the foundation for enduring survivable C3 concepts; and, at the same time, are used to test experimental concepts in advanced military automatic data processing and network communications.","PeriodicalId":126184,"journal":{"name":"MILCOM 1986 - IEEE Military Communications Conference: Communications-Computers: Teamed for the 90's","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130199296","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
Networking of Large Numbers of Satellites 大量卫星组网
MILCOM 1986 - IEEE Military Communications Conference: Communications-Computers: Teamed for the 90's Pub Date : 1986-10-01 DOI: 10.1109/MILCOM.1986.4805766
K. Brayer, W. Collins, P. Crane
{"title":"Networking of Large Numbers of Satellites","authors":"K. Brayer, W. Collins, P. Crane","doi":"10.1109/MILCOM.1986.4805766","DOIUrl":"https://doi.org/10.1109/MILCOM.1986.4805766","url":null,"abstract":"There are currently a large number of technologies and system concepts being offered for use as SDI systems. All of them employ significant numbers of satellites in orbit around the earth. This introduces the task of networking a large number of satellites for the passage of command and control traffic. The purpose of this paper is not to discuss any specific SDI system, but to demonstrate that a large network of satellites is not an impediment, but rather an opportunity to promote rapid distribution of information.","PeriodicalId":126184,"journal":{"name":"MILCOM 1986 - IEEE Military Communications Conference: Communications-Computers: Teamed for the 90's","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115078970","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
Airborne Laser Communications Scintillation Measurements 机载激光通信闪烁测量
MILCOM 1986 - IEEE Military Communications Conference: Communications-Computers: Teamed for the 90's Pub Date : 1986-10-01 DOI: 10.1109/MILCOM.1986.4805855
R. Feldmann, L. B. Mercer, S. Rogers
{"title":"Airborne Laser Communications Scintillation Measurements","authors":"R. Feldmann, L. B. Mercer, S. Rogers","doi":"10.1109/MILCOM.1986.4805855","DOIUrl":"https://doi.org/10.1109/MILCOM.1986.4805855","url":null,"abstract":"As part of the HAVE LACE (Laser Airborne Communications Experiment) program, optical scintillation data was collected and is being analyzed. This data will be used to examine the effects of scintillation on air-to-air laser communication performance. The HAVE LACE terminals use direct detection of a pulsed diode laser. The random variations in received signal strength, called scintillation, are caused by the time varying index of refraction, called atmospheric turbulence. The scintillation data that was collected is compared to terrestrial scintillation data in an effort to validate atmospheric turbulence models. Valid models can then be used to aid in the design of air-to-air laser communication terminals that provide acceptable probability of error performance.","PeriodicalId":126184,"journal":{"name":"MILCOM 1986 - IEEE Military Communications Conference: Communications-Computers: Teamed for the 90's","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116284030","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
Advanced Digital Signal Processing Techniques and Hardware for Radio Direction Finding Applications 无线电测向应用的先进数字信号处理技术和硬件
MILCOM 1986 - IEEE Military Communications Conference: Communications-Computers: Teamed for the 90's Pub Date : 1986-10-01 DOI: 10.1109/MILCOM.1986.4805681
R. W. Robison
{"title":"Advanced Digital Signal Processing Techniques and Hardware for Radio Direction Finding Applications","authors":"R. W. Robison","doi":"10.1109/MILCOM.1986.4805681","DOIUrl":"https://doi.org/10.1109/MILCOM.1986.4805681","url":null,"abstract":"A dual-channel Digital Signal Processing-based IF Processor (DSPIFP) has been developed for use in radio direction finders. An undersampled mixing technique was used to allow direct digitization at 25 kHz of a 455 kHz IF signal with a bandwidth of 10 kHz or less. A 64-point FFT was used to estimate the spectrum. The DSPIFP measures amplitudes from both channels and relative phase difference between channels. These measurements are made on the strongest signal in the passband; however, this could be extended to other resolved signals in the passband. The test results have shown that DSP techniques can be used to provide IF processing functions previously implemented in analog circuitry, giving comparable performance. The DSPIFP has the additional capability of effective amplitude and phase measurement on the desired signal in the presence of co-channel interference.","PeriodicalId":126184,"journal":{"name":"MILCOM 1986 - IEEE Military Communications Conference: Communications-Computers: Teamed for the 90's","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114391092","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 New FDMA Modem for Defense Satellite Communications 用于国防卫星通信的新型FDMA调制解调器
MILCOM 1986 - IEEE Military Communications Conference: Communications-Computers: Teamed for the 90's Pub Date : 1986-10-01 DOI: 10.1109/MILCOM.1986.4805662
Steven H. Gardner, W. A. Shumate, B. Trumpis, Aladdin Wardani
{"title":"A New FDMA Modem for Defense Satellite Communications","authors":"Steven H. Gardner, W. A. Shumate, B. Trumpis, Aladdin Wardani","doi":"10.1109/MILCOM.1986.4805662","DOIUrl":"https://doi.org/10.1109/MILCOM.1986.4805662","url":null,"abstract":"A new modem for Frequency Division Multiple Access (FDMA) satellite communications is presented. The modem utilizes a number of unique implementation approaches that result in exceptional performance and flexibility with low cost and power consumption. Very close channel spacings allowed by the modem result in greater bandwidth efficiency, and integral forward error correction (FEC) coding provides low bit error rates (BER) even in systems limited in satellite power.","PeriodicalId":126184,"journal":{"name":"MILCOM 1986 - IEEE Military Communications Conference: Communications-Computers: Teamed for the 90's","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115050992","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
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