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MILCOM 97 MILCOM 97 Proceedings最新文献

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Wideband multi-carrier transmission for military HF communication 军用高频通信的宽带多载波传输
MILCOM 97 MILCOM 97 Proceedings Pub Date : 1997-11-02 DOI: 10.1109/MILCOM.1997.646776
J. Nilsson, T. Giles
{"title":"Wideband multi-carrier transmission for military HF communication","authors":"J. Nilsson, T. Giles","doi":"10.1109/MILCOM.1997.646776","DOIUrl":"https://doi.org/10.1109/MILCOM.1997.646776","url":null,"abstract":"The potential of multi-carrier, or orthogonal frequency division multiplexing (OFDM), for military HF communication is explored. In commercial OFDM systems a guard-time (or cyclic extension) is used to remove intersymbol interference (ISI). Furthermore, OFDM is normally used to support fairly high data rates. However, a robust stealth system is proposed. That is, the system has no guard-time and a high spreading factor (low data rate). A guard-time would simplify hostile detection of the transmitted signal. Finally, a Gaussian scrambler is tested.","PeriodicalId":351392,"journal":{"name":"MILCOM 97 MILCOM 97 Proceedings","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129838409","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: 36
A cryptographically secure EW database with selective random access 具有选择性随机访问的加密安全电子战数据库
MILCOM 97 MILCOM 97 Proceedings Pub Date : 1997-11-02 DOI: 10.1109/MILCOM.1997.644999
N. Ikram, S. Shepherd
{"title":"A cryptographically secure EW database with selective random access","authors":"N. Ikram, S. Shepherd","doi":"10.1109/MILCOM.1997.644999","DOIUrl":"https://doi.org/10.1109/MILCOM.1997.644999","url":null,"abstract":"This paper describes the design and implementation of a high security electronic warfare (EW) database based on building up a hierarchical information system employing multilevel security classifications. Users' activities in each classification are authorised via personal identification numbers (PINs). The information is encrypted using the software optimised encryption algorithm (SEAL) which enables random access to and decryption of records in the database as well as guaranteeing the integrity of the retrieved records. Only the required record is decrypted; the database as stored on the permanent media remains fully encrypted at all times providing a very high degree of database confidentiality and integrity. The application has been particularly targeted towards electronic warfare libraries and tests conducted to determine its utility in real-time systems.","PeriodicalId":351392,"journal":{"name":"MILCOM 97 MILCOM 97 Proceedings","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129982342","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
Matrix amplifier and routing system (MARS) analysis program 矩阵放大器和路由系统(MARS)分析程序
MILCOM 97 MILCOM 97 Proceedings Pub Date : 1997-11-02 DOI: 10.1109/MILCOM.1997.646715
X. Vuong
{"title":"Matrix amplifier and routing system (MARS) analysis program","authors":"X. Vuong","doi":"10.1109/MILCOM.1997.646715","DOIUrl":"https://doi.org/10.1109/MILCOM.1997.646715","url":null,"abstract":"Matrix amplifier and routing system (MARS) is a satellite payload technology that can be applied to both commercial and military communication satellites to increase capacity and flexibility. MARS enables the available RF power of satellite high power amplifiers (HPAs) to be automatically shared among channels (transponders or downlink beams). MARS also allows the routing of signals from each uplink beam or channel to one or more of downlink beams without using any switches or multiplexers placed after the HPA outputs. While the MARS concept is simple and straightforward, the MARS operating performance analysis is complex and tedious (in comparison to that of a conventional payload). This paper describes a general-purpose computer program called MARSAP that can be used to analyze the performance of a MARS. The emphasis is placed on the mathematical modeling of the MARS components and the algorithms used in the program. General nonlinear/intermod MARS performance results simulated from the program are also presented along with recommendations for future enhancement to the program.","PeriodicalId":351392,"journal":{"name":"MILCOM 97 MILCOM 97 Proceedings","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130261409","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
Application of the system engineering process in developing joint system architectures 系统工程过程在开发联合系统架构中的应用
MILCOM 97 MILCOM 97 Proceedings Pub Date : 1997-11-02 DOI: 10.1109/MILCOM.1997.644986
K. Kovach, J.H. Siliato, F.T. Beale
{"title":"Application of the system engineering process in developing joint system architectures","authors":"K. Kovach, J.H. Siliato, F.T. Beale","doi":"10.1109/MILCOM.1997.644986","DOIUrl":"https://doi.org/10.1109/MILCOM.1997.644986","url":null,"abstract":"The Department of Defense has defined C4I architectures in terms of operational, system, and technical architectures. The definition, implementation, and successful fielding of systems which are compliant with the architectural framework depends on the successful determination and refinement of first, the operational architecture and second the articulation of the system architecture. System architecture is an amalgamation of both the technical requirements as determined by the technical architecture and the operational requirements as defined in the operational architecture. The US Army CECOM RDEC under the auspices of the Combined Arms Command and Control (CAC2) Advanced Technology Demonstration (ATD) has developed and refined a process by which the operational users can articulate their operational architecture in terms which are useful to the material development community and then ultimately provide feedback to the technical solutions provided by a disciplined system engineering process. The CECOM RDEC has pioneered efforts relating to the use of various modeling tools and laboratory assets to provide analysis of current and emerging tactical communications infrastructures. The paper explains the CECOM system architecture process and how it can be adapted to the joint arena. A key to understanding this process is an explanation of the process by which designers of communications architectures can identify and define the joint operational C4I requirements for military operations.","PeriodicalId":351392,"journal":{"name":"MILCOM 97 MILCOM 97 Proceedings","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125460976","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
Metrics for characterizing radio links in a frequency-hop packet radio network 表征频率跳分组无线网络中无线电链路的度量
MILCOM 97 MILCOM 97 Proceedings Pub Date : 1997-11-02 DOI: 10.1109/MILCOM.1997.648732
M. Pursley, H. Russell, J. Wysocarski
{"title":"Metrics for characterizing radio links in a frequency-hop packet radio network","authors":"M. Pursley, H. Russell, J. Wysocarski","doi":"10.1109/MILCOM.1997.648732","DOIUrl":"https://doi.org/10.1109/MILCOM.1997.648732","url":null,"abstract":"For efficient and reliable routing in a store-and-forward mobile packet radio network that supports multimedia traffic, the routing protocols must account for the suitability of each link to handle each type of traffic. The approach presented is based on a family of link metrics, one metric for each type of traffic. The metric for a particular traffic type is designed to measure the ability of a link to meet the service requirements for that traffic type. The family of metrics is applied to each link in the network to provide a family of link resistances. For each type of traffic the resistance values for the links in a route between a source-destination pair are combined to determine the resistance of that route, and a distance-vector routing algorithm is employed to find the routes of least resistance through the network. Two topics investigated in this paper are the sensitivity of the throughput performance to the number of frame erasures that are permitted in voice transmissions and the use of a reservation-based channel-access method.","PeriodicalId":351392,"journal":{"name":"MILCOM 97 MILCOM 97 Proceedings","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125807924","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
Use of commercial products for configuration management of military networks 商用产品用于军事网络的配置管理
MILCOM 97 MILCOM 97 Proceedings Pub Date : 1997-11-02 DOI: 10.1109/MILCOM.1997.644987
A.G. Fonzo, M. Bradley, J.S. Garhart
{"title":"Use of commercial products for configuration management of military networks","authors":"A.G. Fonzo, M. Bradley, J.S. Garhart","doi":"10.1109/MILCOM.1997.644987","DOIUrl":"https://doi.org/10.1109/MILCOM.1997.644987","url":null,"abstract":"There is a need for an automated architecture engineering tool to support advanced communication networking efforts. Agencies, such as the US Army's Communications-Electronics Command (CECOM) and Program Executive Office Command, Control, and Communications Systems (PEO-C3S) have the requirement for a suite of applications to provide detailed diagramming, definition and analysis. Many COTS and GOTS products are available to perform some of the tasks required in analyzing, designing, developing, and implementing a network. Many tools which are graphically oriented for use in designing a network, do not provide the capability of automated analysis. While many other network analysis tools are not graphical or user-friendly, they lack the ability to store relevant \"user\" data. Some of the information to populate the network architectures exists in inventory databases but the data is not easily accessible and does not contain all the information required.","PeriodicalId":351392,"journal":{"name":"MILCOM 97 MILCOM 97 Proceedings","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125942109","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
DSSS/MCM system performance in a Doppler spread channel DSSS/MCM系统在多普勒扩频信道中的性能
MILCOM 97 MILCOM 97 Proceedings Pub Date : 1997-11-02 DOI: 10.1109/MILCOM.1997.646689
T.B. Welch, R. Ziemer
{"title":"DSSS/MCM system performance in a Doppler spread channel","authors":"T.B. Welch, R. Ziemer","doi":"10.1109/MILCOM.1997.646689","DOIUrl":"https://doi.org/10.1109/MILCOM.1997.646689","url":null,"abstract":"There has been a great deal of interest in the use of direct sequence spread spectrum (DS-SS) in combination with multicarrier modulation (MCM). Although the proposed system implementations in the literature vary, all of these systems share the functionality of DS-SS, MCM, and some form of a branch combiner at the receiver. We investigate the performance of such a system transmitting through a Doppler spread channel. In Doppler spread fading, the proposed system performance exhibits an irreducible bit error probability (BEP) even for the single user case. Dramatic performance improvements can be realized with the use of an ideal maximal ratio combiner (MRC). A system utilizing an equal gain combiner (EGC) is analyzed. Finally, we compare the analytic results with the results from several computer simulations.","PeriodicalId":351392,"journal":{"name":"MILCOM 97 MILCOM 97 Proceedings","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126404593","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
Asymptotic performances of nonrepetitive and repetitive turbo codes 非重复和重复turbo码的渐近性能
MILCOM 97 MILCOM 97 Proceedings Pub Date : 1997-11-02 DOI: 10.1109/MILCOM.1997.648663
C.C. Wang
{"title":"Asymptotic performances of nonrepetitive and repetitive turbo codes","authors":"C.C. Wang","doi":"10.1109/MILCOM.1997.648663","DOIUrl":"https://doi.org/10.1109/MILCOM.1997.648663","url":null,"abstract":"The analytically calculated asymptotic BER performance of turbo codes using a transfer function bound technique is presented. Good code structures for constraints lengths 3, 4, and 5 are listed. The repetitive turbo code is introduced with two types of decoding algorithms. Its asymptotic BER performance is presented. Good repetitive turbo codes are also listed. It is shown that the BER performance can be improved using the repetitive turbo code.","PeriodicalId":351392,"journal":{"name":"MILCOM 97 MILCOM 97 Proceedings","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121247237","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
Source enumeration using a signal-selective information theoretic criterion 使用信号选择信息论准则的源枚举
MILCOM 97 MILCOM 97 Proceedings Pub Date : 1997-11-02 DOI: 10.1109/MILCOM.1997.644868
Thomas Shrimpton, S. V. Schell
{"title":"Source enumeration using a signal-selective information theoretic criterion","authors":"Thomas Shrimpton, S. V. Schell","doi":"10.1109/MILCOM.1997.644868","DOIUrl":"https://doi.org/10.1109/MILCOM.1997.644868","url":null,"abstract":"We propose a novel signal-selective approach to enumerating the signals of interest (SOIs) impinging upon an array of antennas. This new signal selective information theoretic criterion (SSITC) is derived by formulating the likelihood function for parameters of second-order cyclostationary signals in unknown stationary interference plus noise, and then applying Rissanen's MDL principle. We demonstrate through computer simulations that SSITC is able to perform correctly when there are more signals than sensors, the angular separations among the interferers and the signals of interest are arbitrarily small, and directional (spatially colored) noise is present. Thus, SSITC is an appropriate source enumerator to use in conjunction with cyclostationarity-exploiting direction-finding algorithms, such as cyclic MUSIC, and cyclostationarity-exploiting blind adaptive spatial filtering algorithms, such as SCORE and PCCA.","PeriodicalId":351392,"journal":{"name":"MILCOM 97 MILCOM 97 Proceedings","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125765435","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
Internetworking ATM with DAMA-controlled satcom 具有dama控制的卫星通信的联网ATM机
MILCOM 97 MILCOM 97 Proceedings Pub Date : 1997-11-02 DOI: 10.1109/MILCOM.1997.646710
G. Bivens, C. Hammond, M. Katz
{"title":"Internetworking ATM with DAMA-controlled satcom","authors":"G. Bivens, C. Hammond, M. Katz","doi":"10.1109/MILCOM.1997.646710","DOIUrl":"https://doi.org/10.1109/MILCOM.1997.646710","url":null,"abstract":"Rome Laboratory funded a program entitled \"DAWS\" to investigate the internetworking of demand assigned multiple access (DAMA)-controlled satellite communication, asynchronous transfer mode (ATM) and commercial and military wireless land mobile (WLM) networks (Study). This paper presents the analysis of the ATM to DAMA interface. The network configurations developed will evolve into an integrated communications architecture to support the US Air Force Air Combat Command and Air Mobility Command communication requirements and focus on emerging technologies, military and commercial open-system standards, and networking concepts as they apply to deployed mobile and airborne communications systems.","PeriodicalId":351392,"journal":{"name":"MILCOM 97 MILCOM 97 Proceedings","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126579901","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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