Pub Date : 1988-10-23DOI: 10.1109/MILCOM.1988.13518
K. Kim, J. Wakefield
The authors describe a cost-effective means of providing integrated services digital network (ISDN) basic access by satellite to locations which are not near the desired ISDN switch. Satellite access is provided by the ISDN satellite terminal (ISAT). The ISAT transmit and receives the ISDN basic data rate of 144 Kb/s (2B+D) plus the maintenance and service channel of 16 Kb/s (totaling 160 Kb/s) anywhere within satellite coverage, including overseas. System implementation is described.<>
{"title":"ISDN basic access for remote locations","authors":"K. Kim, J. Wakefield","doi":"10.1109/MILCOM.1988.13518","DOIUrl":"https://doi.org/10.1109/MILCOM.1988.13518","url":null,"abstract":"The authors describe a cost-effective means of providing integrated services digital network (ISDN) basic access by satellite to locations which are not near the desired ISDN switch. Satellite access is provided by the ISDN satellite terminal (ISAT). The ISAT transmit and receives the ISDN basic data rate of 144 Kb/s (2B+D) plus the maintenance and service channel of 16 Kb/s (totaling 160 Kb/s) anywhere within satellite coverage, including overseas. System implementation is described.<<ETX>>","PeriodicalId":66166,"journal":{"name":"军事通信技术","volume":"137 1","pages":"1049-1054 vol.3"},"PeriodicalIF":0.0,"publicationDate":"1988-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80091681","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}
Pub Date : 1988-10-23DOI: 10.1109/MILCOM.1988.13475
D. Matsunaga
The author conducts a brief survey of TRW very-high-speed integrated circuits (VHSIC) Phase 2 technology and then explores its potential benefits along with its limitations to an EHF modem/controller. The impact of TRW VHSIC Phase 2 SuperChips is analyzed for the overall command-post and manpack modem/controller requirements, hardware architecture, data/control flow and mechanical design. It is found that the use of TRW VHSIC Phase 2 chips results in an order-of-magnitude improvement of size, weight, power, and reliability over conventional technology. Design areas which potentially limit the impact of high levels of integration are also discussed, along with their solutions.<>
{"title":"VHSIC phase 2 technology and the EHF modem/controller","authors":"D. Matsunaga","doi":"10.1109/MILCOM.1988.13475","DOIUrl":"https://doi.org/10.1109/MILCOM.1988.13475","url":null,"abstract":"The author conducts a brief survey of TRW very-high-speed integrated circuits (VHSIC) Phase 2 technology and then explores its potential benefits along with its limitations to an EHF modem/controller. The impact of TRW VHSIC Phase 2 SuperChips is analyzed for the overall command-post and manpack modem/controller requirements, hardware architecture, data/control flow and mechanical design. It is found that the use of TRW VHSIC Phase 2 chips results in an order-of-magnitude improvement of size, weight, power, and reliability over conventional technology. Design areas which potentially limit the impact of high levels of integration are also discussed, along with their solutions.<<ETX>>","PeriodicalId":66166,"journal":{"name":"军事通信技术","volume":"2 1","pages":"749-753 vol.3"},"PeriodicalIF":0.0,"publicationDate":"1988-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78521465","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}
Pub Date : 1988-10-23DOI: 10.1109/MILCOM.1988.13419
K. Bakhru, A. Krieger
Algorithms for an adaptive antenna system are developed to estimate the direction of arrival for multiple signals to reduce spatial search. The system works in conjunction with a frequency hopping modem to minimize average acquisition time while improving the signal-to-interference-plus-noise ratio at the modem input. Simulation results indicate that an adaptive antenna can optimize acquisition time and estimate signal direction simultaneously in the presence of interference.<>
{"title":"Spatial acquisition of wideband frequency-hopping signals using adaptive array processing","authors":"K. Bakhru, A. Krieger","doi":"10.1109/MILCOM.1988.13419","DOIUrl":"https://doi.org/10.1109/MILCOM.1988.13419","url":null,"abstract":"Algorithms for an adaptive antenna system are developed to estimate the direction of arrival for multiple signals to reduce spatial search. The system works in conjunction with a frequency hopping modem to minimize average acquisition time while improving the signal-to-interference-plus-noise ratio at the modem input. Simulation results indicate that an adaptive antenna can optimize acquisition time and estimate signal direction simultaneously in the presence of interference.<<ETX>>","PeriodicalId":66166,"journal":{"name":"军事通信技术","volume":"26 1","pages":"375-380 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1988-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78818318","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}
Pub Date : 1988-10-23DOI: 10.1109/MILCOM.1988.13403
F. Abrishamkar
The author presents a trellis code coupled with a class of continuous phase modulation (CPM) signals over a multipath fading channel. Receiver structures for coherent, differentially coherent, and noncoherent detection are presented. Simulation results for the systems under consideration are shown. It is concluded that the differentially coherent system, though inferior in performance to the coherent system, offers the most feasible receiver structure for the trellis-coded CPM over a Rician fading channel.<>
{"title":"Class of compact spectrum coded signals over multipath fading channel","authors":"F. Abrishamkar","doi":"10.1109/MILCOM.1988.13403","DOIUrl":"https://doi.org/10.1109/MILCOM.1988.13403","url":null,"abstract":"The author presents a trellis code coupled with a class of continuous phase modulation (CPM) signals over a multipath fading channel. Receiver structures for coherent, differentially coherent, and noncoherent detection are presented. Simulation results for the systems under consideration are shown. It is concluded that the differentially coherent system, though inferior in performance to the coherent system, offers the most feasible receiver structure for the trellis-coded CPM over a Rician fading channel.<<ETX>>","PeriodicalId":66166,"journal":{"name":"军事通信技术","volume":"5 1","pages":"265-270 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1988-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74439725","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}
Pub Date : 1988-10-23DOI: 10.1109/MILCOM.1988.13445
W.L. Bremer
The importance of simulated far-field testing of laser intersatellite communication systems is demonstrated through experience gained with and tests performed on a prototype system. It is shown that the performance of the link can be seriously degraded if the magnitude and dynamics of the speckle in the projected far field are not limited or controlled in some manner. System performance is controlled by screening of laser diode/fiber assemblies. Other potential techniques to minimize the impact of speckle are addressed.<>
{"title":"Speckle effects on intersatellite laser communication","authors":"W.L. Bremer","doi":"10.1109/MILCOM.1988.13445","DOIUrl":"https://doi.org/10.1109/MILCOM.1988.13445","url":null,"abstract":"The importance of simulated far-field testing of laser intersatellite communication systems is demonstrated through experience gained with and tests performed on a prototype system. It is shown that the performance of the link can be seriously degraded if the magnitude and dynamics of the speckle in the projected far field are not limited or controlled in some manner. System performance is controlled by screening of laser diode/fiber assemblies. Other potential techniques to minimize the impact of speckle are addressed.<<ETX>>","PeriodicalId":66166,"journal":{"name":"军事通信技术","volume":"1 1","pages":"559-563 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1988-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77143746","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}
Pub Date : 1988-10-23DOI: 10.1109/MILCOM.1988.13412
I. Mayk, I. Rubin
Architectural concepts evolving from the general architectural principals adopted by the ISO OSI reference-modeling effort are applied to C/sup 3/ (command control, and communication) systems. The resulting C/sup 3/ reference model describes a framework for the evolution of a coordinated and detailed definition of C/sup 3/ discipline addressing complete C/sup 3/ systems, their resources, and inherent interactions. It includes generic and analog extensions to the ISO OSI reference model (RM). As such, it requires reinterpretations and generalizations that go far beyond the scope of the ISO OSI RM. The C/sup 3/ RM includes the ISO OSI RM by adapting it for the communications types of interactions. In parallel, layers of three other complementary types of isomorphic interactions also provide services to the application layer.<>
从ISO OSI参考建模工作所采用的一般体系结构原则演变而来的体系结构概念应用于C/sup 3/(命令控制和通信)系统。由此产生的C/sup 3参考模型描述了一个框架，用于协调和详细定义C/sup 3/规程的演变，处理完整的C/sup 3/系统、它们的资源和内在的相互作用。它包括ISO OSI参考模型(RM)的通用扩展和模拟扩展。因此，它需要重新解释和概括，这远远超出了ISO OSI RM的范围。C/sup 3/ RM通过调整ISO OSI RM以适应交互的通信类型，从而包含了ISO OSI RM。与此同时，其他三种互补类型的同构交互层也向应用层提供服务。
{"title":"Architectural concepts for C/sup 3/ systems","authors":"I. Mayk, I. Rubin","doi":"10.1109/MILCOM.1988.13412","DOIUrl":"https://doi.org/10.1109/MILCOM.1988.13412","url":null,"abstract":"Architectural concepts evolving from the general architectural principals adopted by the ISO OSI reference-modeling effort are applied to C/sup 3/ (command control, and communication) systems. The resulting C/sup 3/ reference model describes a framework for the evolution of a coordinated and detailed definition of C/sup 3/ discipline addressing complete C/sup 3/ systems, their resources, and inherent interactions. It includes generic and analog extensions to the ISO OSI reference model (RM). As such, it requires reinterpretations and generalizations that go far beyond the scope of the ISO OSI RM. The C/sup 3/ RM includes the ISO OSI RM by adapting it for the communications types of interactions. In parallel, layers of three other complementary types of isomorphic interactions also provide services to the application layer.<<ETX>>","PeriodicalId":66166,"journal":{"name":"军事通信技术","volume":"60 1","pages":"329-335 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1988-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85637216","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}
Pub Date : 1988-10-23DOI: 10.1109/MILCOM.1988.13507
A. Polydoros, N.B. Pronios
Two techniques for deriving the power spectral density (PSD) of digitally modulated signals are examined. Both concentrate on the autocorrelation function of modulated sequences, and one of them makes use of the discrete Fourier transform coefficients of this function. These methods provide general expression for PSDs which can be useful in a variety of situations; for example, in the case of the product pseudonoise (PN) codes with arbitrary modulating waveforms. Specific examples are given, where the dependence of the PSD on the relative shift between the two versions of a PN sequence is demonstrated. This could have implications on all systems which use the standard correlation operation (despreading) of PN codes and different pulse shapes.<>
{"title":"On the power spectral density of digitally modulated signals and applications in code despreading","authors":"A. Polydoros, N.B. Pronios","doi":"10.1109/MILCOM.1988.13507","DOIUrl":"https://doi.org/10.1109/MILCOM.1988.13507","url":null,"abstract":"Two techniques for deriving the power spectral density (PSD) of digitally modulated signals are examined. Both concentrate on the autocorrelation function of modulated sequences, and one of them makes use of the discrete Fourier transform coefficients of this function. These methods provide general expression for PSDs which can be useful in a variety of situations; for example, in the case of the product pseudonoise (PN) codes with arbitrary modulating waveforms. Specific examples are given, where the dependence of the PSD on the relative shift between the two versions of a PN sequence is demonstrated. This could have implications on all systems which use the standard correlation operation (despreading) of PN codes and different pulse shapes.<<ETX>>","PeriodicalId":66166,"journal":{"name":"军事通信技术","volume":"134 ","pages":"977-981 vol.3"},"PeriodicalIF":0.0,"publicationDate":"1988-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91463175","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}
Pub Date : 1988-10-23DOI: 10.1109/MILCOM.1988.13398
L. Riddle
It is shown that, in a severely faded channel, onboard processing provides essentially no improvement in error probability when both the uplink and downlink are Rayleigh-faded, and when there is no diversity. Dual (or higher-order) diversity not only provides an inherent diversity gain, but also regains a portion of the original on-board processing gain that was lost when the fading occurred. It is concluded that, when either the uplink or the downlink (but not both) undergoes severe fading, on-board processing provides a large processing gain, but only for the link not experiencing the fade.<>
{"title":"On-board processing of faded satellite communication signals","authors":"L. Riddle","doi":"10.1109/MILCOM.1988.13398","DOIUrl":"https://doi.org/10.1109/MILCOM.1988.13398","url":null,"abstract":"It is shown that, in a severely faded channel, onboard processing provides essentially no improvement in error probability when both the uplink and downlink are Rayleigh-faded, and when there is no diversity. Dual (or higher-order) diversity not only provides an inherent diversity gain, but also regains a portion of the original on-board processing gain that was lost when the fading occurred. It is concluded that, when either the uplink or the downlink (but not both) undergoes severe fading, on-board processing provides a large processing gain, but only for the link not experiencing the fade.<<ETX>>","PeriodicalId":66166,"journal":{"name":"军事通信技术","volume":"53 1","pages":"229-233 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1988-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90814049","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}
Pub Date : 1988-10-23DOI: 10.1109/MILCOM.1988.13417
R. Bloomfield
After establishing the need for using a functional architecture design paradigm, the author explicitly considers target MILDEP (military department) local information-transfer architectures as an important input for the design of post-1995 CONUS DCS/DSN (Defense Communications Agency/Defense Switched Network) access architectures. A synopsis of the target MILDEP local information systems indicates that the common denominator is ISDN. Representative base communication architectures are used to illustrate this, although they do not indicate the extent to which individual mission needs might force a departure from the target architectures. Access to the common user long-haul network (both private and public) is a relatively unexplored but critical area. A functional architecture approach appears necessary in order to define, standardize, and implement advanced DCS/DSN services and to develop a viable network evolution study.<>
{"title":"Architectural considerations for accessing the post-1995 CONUS DCS/DSN: target MILDEP local information transfer networks","authors":"R. Bloomfield","doi":"10.1109/MILCOM.1988.13417","DOIUrl":"https://doi.org/10.1109/MILCOM.1988.13417","url":null,"abstract":"After establishing the need for using a functional architecture design paradigm, the author explicitly considers target MILDEP (military department) local information-transfer architectures as an important input for the design of post-1995 CONUS DCS/DSN (Defense Communications Agency/Defense Switched Network) access architectures. A synopsis of the target MILDEP local information systems indicates that the common denominator is ISDN. Representative base communication architectures are used to illustrate this, although they do not indicate the extent to which individual mission needs might force a departure from the target architectures. Access to the common user long-haul network (both private and public) is a relatively unexplored but critical area. A functional architecture approach appears necessary in order to define, standardize, and implement advanced DCS/DSN services and to develop a viable network evolution study.<<ETX>>","PeriodicalId":66166,"journal":{"name":"军事通信技术","volume":"3 1","pages":"361-368 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1988-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91194305","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}
Pub Date : 1988-10-23DOI: 10.1109/MILCOM.1988.13436
S. Huffman, T. Altes, K. Chahine
Proliferation of nodes has been suggested as a means to achieve reliable communications even when a significant fraction of a network is destroyed. The authors examine issues associated with the design of proliferated, survivable networks based on a layered architecture. A concept for proliferated network operation is outlined, and measures of network performance are described. Threats to each network layer are examined, and survivable network design issues are discussed. It is concluded that proliferating network nodes, using multimedia and interconnecting networks, can enhance communication network survivability.<>
{"title":"Issues for proliferated survivable network design","authors":"S. Huffman, T. Altes, K. Chahine","doi":"10.1109/MILCOM.1988.13436","DOIUrl":"https://doi.org/10.1109/MILCOM.1988.13436","url":null,"abstract":"Proliferation of nodes has been suggested as a means to achieve reliable communications even when a significant fraction of a network is destroyed. The authors examine issues associated with the design of proliferated, survivable networks based on a layered architecture. A concept for proliferated network operation is outlined, and measures of network performance are described. Threats to each network layer are examined, and survivable network design issues are discussed. It is concluded that proliferating network nodes, using multimedia and interconnecting networks, can enhance communication network survivability.<<ETX>>","PeriodicalId":66166,"journal":{"name":"军事通信技术","volume":"26 1","pages":"489-492 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1988-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91227545","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}
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