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MILCOM 92 Conference Record最新文献

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Non-coherent detection for DS spread-spectrum acquisition 扩频采集的非相干检测
MILCOM 92 Conference Record Pub Date : 1992-10-11 DOI: 10.1109/MILCOM.1992.244042
Vladan M. Jovanovic, E. Sousa
{"title":"Non-coherent detection for DS spread-spectrum acquisition","authors":"Vladan M. Jovanovic, E. Sousa","doi":"10.1109/MILCOM.1992.244042","DOIUrl":"https://doi.org/10.1109/MILCOM.1992.244042","url":null,"abstract":"Noncoherent detectors for initial code synchronization (acquisition) of binary- and quarternary-phase-shift-keying (BPSK and QPSK) direct-sequence (DS) spread-spectrum signals are analyzed. In addition to the thermal noise, in many applications such detectors are faced with self-noise due to imperfect correlations. Assuming random spreading code sequences, it is shown that the Gaussian approximation to the code partial autocorrelation distribution is very well justified. Based on the theory of circularly symmetric random variables, exact results for the detection performance of BPSK and QPSK schemes are obtained, and handy approximations are devised.<<ETX>>","PeriodicalId":394587,"journal":{"name":"MILCOM 92 Conference Record","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116165388","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
Whither tactical communications 去向战术通信
MILCOM 92 Conference Record Pub Date : 1992-10-11 DOI: 10.1109/MILCOM.1992.244146
L. L. Taylor
{"title":"Whither tactical communications","authors":"L. L. Taylor","doi":"10.1109/MILCOM.1992.244146","DOIUrl":"https://doi.org/10.1109/MILCOM.1992.244146","url":null,"abstract":"The author presents an appeal to those concerned with military communications to work together to put an end to fractionated military communication systems, and provide well-designed, integrated, flexible, and survivable (but less expensive) voice and data communications for the soldier and commander of the future. It is suggested that MILCOM start the process by forming a civilian/military/government communication planning, coordination, and consulting committee dedicated to focusing standards, specifications, research, development, and engineering on coordinated integrated communications for military use.<<ETX>>","PeriodicalId":394587,"journal":{"name":"MILCOM 92 Conference Record","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120899901","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
A value-based protocol for message scheduling in a C/sup 3/ workstation 一种在C/sup /工作站中用于消息调度的基于值的协议
MILCOM 92 Conference Record Pub Date : 1992-10-11 DOI: 10.1109/MILCOM.1992.243969
J. E. Baker, L. Clare, J. Agre, W. Heyman
{"title":"A value-based protocol for message scheduling in a C/sup 3/ workstation","authors":"J. E. Baker, L. Clare, J. Agre, W. Heyman","doi":"10.1109/MILCOM.1992.243969","DOIUrl":"https://doi.org/10.1109/MILCOM.1992.243969","url":null,"abstract":"The authors investigate the use of a command, control, and communications workstation (C3WS) to automate the processing and display of incoming messages, status information, and outgoing orders. A protocol has been developed for the scheduling of incoming messages which, by considering their relative importance and criticality, displays them for processing by the commander. Improved decision-making is achieved by presenting the list of pending (unread) messages to the commander in an optimal order, thereby reducing decision cycle times. This aspect is referred to as value-based scheduling of information. To test the concept of value-based message scheduling, a software prototype of a C/sup 3/ workstation has been developed. The functional components of the C3WS software are described, and test trials that have been made are discussed.<<ETX>>","PeriodicalId":394587,"journal":{"name":"MILCOM 92 Conference Record","volume":" 41","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120935417","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
Nonlinear filtering methods for harmonic retrieval 谐波恢复的非线性滤波方法
MILCOM 92 Conference Record Pub Date : 1992-10-11 DOI: 10.1109/MILCOM.1992.244119
T.W. Hilands, S. Thomopoulos
{"title":"Nonlinear filtering methods for harmonic retrieval","authors":"T.W. Hilands, S. Thomopoulos","doi":"10.1109/MILCOM.1992.244119","DOIUrl":"https://doi.org/10.1109/MILCOM.1992.244119","url":null,"abstract":"The authors address the problem of high-resolution parameter estimation of superimposed sinusoids using nonlinear filtering techniques. Six separate nonlinear filters are evaluated for the estimation of the parameters of sinusoids in white and colored Gaussian noise. Experimental evaluation demonstrates that the nonlinear filters perform very satisfactorily (close to the Cramer-Rao bound) for reasonable values of the initial estimation error. A major advantage of using nonlinear filtering methods for harmonic retrieval is that the filters can be applied to time-varying process models as well.<<ETX>>","PeriodicalId":394587,"journal":{"name":"MILCOM 92 Conference Record","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122269080","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 and simulation of FHSS systems for UHF aeromobile channels 超高频航空信道FHSS系统的设计与仿真
MILCOM 92 Conference Record Pub Date : 1992-10-11 DOI: 10.1109/MILCOM.1992.244036
M. Darnell, B. Honary, H. M. Yung, G. Charbit, R. M. Harris
{"title":"Design and simulation of FHSS systems for UHF aeromobile channels","authors":"M. Darnell, B. Honary, H. M. Yung, G. Charbit, R. M. Harris","doi":"10.1109/MILCOM.1992.244036","DOIUrl":"https://doi.org/10.1109/MILCOM.1992.244036","url":null,"abstract":"The authors describe a program of research currently in progress to enhance the design of aeromobile frequency-hopping spread-spectrum (FHSS) radio systems operating in the 255-440 MHz band. The main elements of the program described are: new hop-set sequence designs for multiple-access and antijamming (AJ) purposes: synchronization acquisition techniques; appropriate error control methods; and development of propagation models for aeromobile paths, based on experimental data.<<ETX>>","PeriodicalId":394587,"journal":{"name":"MILCOM 92 Conference Record","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126669740","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 time varying transform domain excision filter for interference rejection in direct-sequence spread-spectrum 一种用于直接序列扩频干扰抑制的时变变换域去除滤波器
MILCOM 92 Conference Record Pub Date : 1992-10-11 DOI: 10.1109/MILCOM.1992.243975
D. B. Ruth, M. Wickert
{"title":"A time varying transform domain excision filter for interference rejection in direct-sequence spread-spectrum","authors":"D. B. Ruth, M. Wickert","doi":"10.1109/MILCOM.1992.243975","DOIUrl":"https://doi.org/10.1109/MILCOM.1992.243975","url":null,"abstract":"The performance of a direct-sequence spread-spectrum (DSSS) receiver with a transform domain prefilter is presented. The ability of a time-varying transform domain filter to reject narrowband interference is studied for different parameters as a function of noise power and jammer power. Digital processing design trade-off issues such as the transform domain excision filter bandwidth and window functions are explored. Extensive Monte Carlo simulations are performed to characterize system performance and parameter sensitivities. Receiver eye patterns are used to investigate the intersymbol interference (ISI) introduced by the time-varying interference rejection filter. Methods of reducing ISI are discussed. Hardware implementation issues are also considered.<<ETX>>","PeriodicalId":394587,"journal":{"name":"MILCOM 92 Conference Record","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125978667","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
Goal architecture and transition strategy for the Defense Information System Network 国防信息系统网络的目标体系结构与过渡策略
MILCOM 92 Conference Record Pub Date : 1992-10-11 DOI: 10.1109/MILCOM.1992.243949
W. F. Vogelzang, R. Hodge
{"title":"Goal architecture and transition strategy for the Defense Information System Network","authors":"W. F. Vogelzang, R. Hodge","doi":"10.1109/MILCOM.1992.243949","DOIUrl":"https://doi.org/10.1109/MILCOM.1992.243949","url":null,"abstract":"The goal-integrated communications architecture for the Defense Information System Network (DISN) is based on open systems principles and will support multimedia workstations and multilevel security applications. Broadband integrated services digital network (BISDN) standards and services form the basic infrastructure of the goal architecture. The authors provide a framework for an economical and efficient transition from today's communications architecture to the goal architecture in a phased approach. The trend is towards information sharing, consolidation, and integrated services (e.g., voice, data, video, leads and imagery) while capitalizing on commercial off-the-shelf services and equipment. The path to the future environment is characterized as a controlled evolutionary transition strategy based on anticipated changes in user requirements, advances in technology, and the pace of standards implementation.<<ETX>>","PeriodicalId":394587,"journal":{"name":"MILCOM 92 Conference Record","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124127311","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
Artificial intelligence for data reduction in key management applications 在密钥管理应用中用于数据减少的人工智能
MILCOM 92 Conference Record Pub Date : 1992-10-11 DOI: 10.1109/MILCOM.1992.244113
J. Pinsky, J. Lynn
{"title":"Artificial intelligence for data reduction in key management applications","authors":"J. Pinsky, J. Lynn","doi":"10.1109/MILCOM.1992.244113","DOIUrl":"https://doi.org/10.1109/MILCOM.1992.244113","url":null,"abstract":"The authors provide an insight into the trade-off necessary to bring the US Army Key Management information under a common control. The Army has initiated the development of an operator workstation to provide an integrated software package for processing of COMSEC information, signal operating instructions, electronic counter measures, and network communications planning. This workstation is the core element of the Army Key Management System (AKMS). The AKMS workstation uses an approach to take advantage of the systems while allowing an improved system response and operator interface.<<ETX>>","PeriodicalId":394587,"journal":{"name":"MILCOM 92 Conference Record","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128815038","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
Variable rate voice coding system 可变速率语音编码系统
MILCOM 92 Conference Record Pub Date : 1992-10-11 DOI: 10.1109/MILCOM.1992.244056
S. Sasaki, M. Miyake
{"title":"Variable rate voice coding system","authors":"S. Sasaki, M. Miyake","doi":"10.1109/MILCOM.1992.244056","DOIUrl":"https://doi.org/10.1109/MILCOM.1992.244056","url":null,"abstract":"The authors discussed a variable bit rate voice coding system in digital communications networks. A novel voice compression method which provides significant improvement in transmission efficiency and flexibility for communications systems is described. The basic scheme used for the investigations involves the use of split vector quantized (SVQ) transform coding (TC) in conjunction with pitch prediction (PP) to achieve excellent voice quality at rates of 4.8 kb/s and below. The authors describe of the algorithm and its implementation for a variable bit rate voice coding system from 4.8 kb/s to 2.4 kb/s.<<ETX>>","PeriodicalId":394587,"journal":{"name":"MILCOM 92 Conference Record","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130511992","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
Hiding traffic flow in communication networks 隐藏通信网络中的流量
MILCOM 92 Conference Record Pub Date : 1992-10-11 DOI: 10.1109/MILCOM.1992.244116
B. Radosavljevic, B. Hajek
{"title":"Hiding traffic flow in communication networks","authors":"B. Radosavljevic, B. Hajek","doi":"10.1109/MILCOM.1992.244116","DOIUrl":"https://doi.org/10.1109/MILCOM.1992.244116","url":null,"abstract":"The authors consider hiding traffic flow on a communication network from an outside eavesdropper. It is assumed that the eavesdropper can detect transmissions, but cannot understand the encrypted messages being sent. The solution proposed for the network is to choose a transmitter activation schedule independent of the traffic demand, and to use this schedule for all data transfers. For the spread spectrum broadcast model, the authors analyze the cost of using this scheme, as reflected in a possible reduction of throughput.<<ETX>>","PeriodicalId":394587,"journal":{"name":"MILCOM 92 Conference Record","volume":"158 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130805153","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: 39
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