Pub Date : 1988-10-23DOI: 10.1109/MILCOM.1988.13492
L. Feldkhun, J. Erickson
An approach to solve the management problem presented by heterogeneous network environments is proposed which is based on the integrated network management system (INMS) model. The operator accesses the INMS through a unified network management interface (UNMI) that provides a generic, vendor-independent view of the network. Each of the various native network management systems interacts with the INMS through a network management gateway. Each gateway maps the native management protocol into a common management protocol that is based on the evolving ISO standards. The key to the UNMI and the common management protocol is the development of a generic network description language that describes the anatomy, behavior, and control of disparate networks.<>
{"title":"Towards an integrated management system for heterogeneous network environments","authors":"L. Feldkhun, J. Erickson","doi":"10.1109/MILCOM.1988.13492","DOIUrl":"https://doi.org/10.1109/MILCOM.1988.13492","url":null,"abstract":"An approach to solve the management problem presented by heterogeneous network environments is proposed which is based on the integrated network management system (INMS) model. The operator accesses the INMS through a unified network management interface (UNMI) that provides a generic, vendor-independent view of the network. Each of the various native network management systems interacts with the INMS through a network management gateway. Each gateway maps the native management protocol into a common management protocol that is based on the evolving ISO standards. The key to the UNMI and the common management protocol is the development of a generic network description language that describes the anatomy, behavior, and control of disparate networks.<<ETX>>","PeriodicalId":66166,"journal":{"name":"军事通信技术","volume":"178 1","pages":"867-876 vol.3"},"PeriodicalIF":0.0,"publicationDate":"1988-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74594288","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.1988.13363
I. Koffman, P. Herczfeld, A. Daryoush, B. Even-or, R. Markowitz
The use of optical fibers as the delay line elements in high-frequency memory loops provides light-weight and small-size devices with long time delays. The authors present a performance analysis and experimental results on a 2-6 GHz fiber-optic recirculating delay line. It is shown that microseconds delays can be achieved using the fiber-optic memory loop (FOML) in the 2 to 6 GHz band. The main advantages of the FOML devices are long delay times, in excess of 100 mu s, a reduction in weight and size by an order of magnitude or more, and immunity to interference (electromagnetic interference and electromagnetic pulse).<>
{"title":"A fiber optic recirculating memory loop operating at microwave frequencies","authors":"I. Koffman, P. Herczfeld, A. Daryoush, B. Even-or, R. Markowitz","doi":"10.1109/MILCOM.1988.13363","DOIUrl":"https://doi.org/10.1109/MILCOM.1988.13363","url":null,"abstract":"The use of optical fibers as the delay line elements in high-frequency memory loops provides light-weight and small-size devices with long time delays. The authors present a performance analysis and experimental results on a 2-6 GHz fiber-optic recirculating delay line. It is shown that microseconds delays can be achieved using the fiber-optic memory loop (FOML) in the 2 to 6 GHz band. The main advantages of the FOML devices are long delay times, in excess of 100 mu s, a reduction in weight and size by an order of magnitude or more, and immunity to interference (electromagnetic interference and electromagnetic pulse).<<ETX>>","PeriodicalId":66166,"journal":{"name":"军事通信技术","volume":"35 1","pages":"31-34 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1988-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78755621","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.1988.13476
D. T. Hayes
Refractive superconducting materials such as niobium (T/sub c/=9 K) and niobium nitride (T/sub c/=16 K) are used in the development of electronic devices for use at millimeter and submillimeter wavelengths. The author describes this program, and discusses the inherent advantages of superconductive electronics and the potential of the high-temperature materials for communication systems. The work concentrates on three areas: (1) the development of the components of a phased-array receiver operating in the 0.1-to-0.3 THz frequency regime; (2) research into NbN Josephson junction (JJ) technology and JJ arrays to provide the basic building blocks for a similar development in the THz regime; and (3) the development of analog and digital signal processing devices using superconducting technology.<>
{"title":"The potential of superconductive electronics for EHF SATCOM terminal technologies","authors":"D. T. Hayes","doi":"10.1109/MILCOM.1988.13476","DOIUrl":"https://doi.org/10.1109/MILCOM.1988.13476","url":null,"abstract":"Refractive superconducting materials such as niobium (T/sub c/=9 K) and niobium nitride (T/sub c/=16 K) are used in the development of electronic devices for use at millimeter and submillimeter wavelengths. The author describes this program, and discusses the inherent advantages of superconductive electronics and the potential of the high-temperature materials for communication systems. The work concentrates on three areas: (1) the development of the components of a phased-array receiver operating in the 0.1-to-0.3 THz frequency regime; (2) research into NbN Josephson junction (JJ) technology and JJ arrays to provide the basic building blocks for a similar development in the THz regime; and (3) the development of analog and digital signal processing devices using superconducting technology.<<ETX>>","PeriodicalId":66166,"journal":{"name":"军事通信技术","volume":"107 1","pages":"755-759 vol.3"},"PeriodicalIF":0.0,"publicationDate":"1988-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79780121","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.1988.13428
D. Reed, M. Wickert
Spread spectrum signals are considered which use spreading codes chosen to give a low probability of chip rate detection. Pulse shaping and pseudorandom amplitude weighting are used to defeat the interceptor who uses a nonlinear circuit to generate a tone at the chip rate. It is shown that a combination of these techniques can, ideally, defeat any such circuit. The use of quantized multilevel symbols is shown to give performance approaching that of Gaussian symbols. A four-level symbol set is shown to be able to defeat quadratic and fourth-power circuits.<>
{"title":"Spread spectrum signals with low probability of chip rate detection","authors":"D. Reed, M. Wickert","doi":"10.1109/MILCOM.1988.13428","DOIUrl":"https://doi.org/10.1109/MILCOM.1988.13428","url":null,"abstract":"Spread spectrum signals are considered which use spreading codes chosen to give a low probability of chip rate detection. Pulse shaping and pseudorandom amplitude weighting are used to defeat the interceptor who uses a nonlinear circuit to generate a tone at the chip rate. It is shown that a combination of these techniques can, ideally, defeat any such circuit. The use of quantized multilevel symbols is shown to give performance approaching that of Gaussian symbols. A four-level symbol set is shown to be able to defeat quadratic and fourth-power circuits.<<ETX>>","PeriodicalId":66166,"journal":{"name":"军事通信技术","volume":"25 1","pages":"437-441 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1988-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81515223","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.1988.13452
W. Lindsey, S. An, R. Vacek
It is shown that the antijamming (AJ) performance of binary FH-DPSK systems is, for all practical purposes, equivalent to (4-ary) FH-DQPSK and that an 8-ary FH-DPSK system has approximately 1.5-dB worse performance relative to binary FH-DPSK. In addition, it is shown that an optimized partial-band multitone jammer (PBMJ) and a partial-band noise jammer (PBNJ) yield essentially equivalent AJ performance in the absence of thermal noise. The present results diverge from those of M.K. Simon et al. (1982, 1985) who concluded that the PBMTJ is 4.4 dB more effective than PBNJ. It is concluded that the differences between the present results and those of Simon et al. are attributable to the fact that they did not use the entropy of a frequency-hopping carrier as a design parameter to be optimized.<>
{"title":"Performance of M-ary FH-DPSK systems in the presence of jamming","authors":"W. Lindsey, S. An, R. Vacek","doi":"10.1109/MILCOM.1988.13452","DOIUrl":"https://doi.org/10.1109/MILCOM.1988.13452","url":null,"abstract":"It is shown that the antijamming (AJ) performance of binary FH-DPSK systems is, for all practical purposes, equivalent to (4-ary) FH-DQPSK and that an 8-ary FH-DPSK system has approximately 1.5-dB worse performance relative to binary FH-DPSK. In addition, it is shown that an optimized partial-band multitone jammer (PBMJ) and a partial-band noise jammer (PBNJ) yield essentially equivalent AJ performance in the absence of thermal noise. The present results diverge from those of M.K. Simon et al. (1982, 1985) who concluded that the PBMTJ is 4.4 dB more effective than PBNJ. It is concluded that the differences between the present results and those of Simon et al. are attributable to the fact that they did not use the entropy of a frequency-hopping carrier as a design parameter to be optimized.<<ETX>>","PeriodicalId":66166,"journal":{"name":"军事通信技术","volume":"24 1","pages":"605-609 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1988-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80316152","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.1988.13416
E. Sousa
A spreading code protocol for a spread spectrum packet radio network that involves the transmission of a synchronization sequence by the transmitter and the transmission of an echo by the receiver back to the transmitter during a link setup process is introduced. Due to the added complexity, the protocol is appropriate for networks with a relatively small number of terminals. As a result of the overhead incurred by the setup minipacket, the protocol will have high efficiency for a system with low data-rate transmitters and a large ratio of the packet transmission time to the propagation delay. Throughput results are given for two spreading code protocols.<>
{"title":"A spreading code protocol utilizing an echo from the receiver","authors":"E. Sousa","doi":"10.1109/MILCOM.1988.13416","DOIUrl":"https://doi.org/10.1109/MILCOM.1988.13416","url":null,"abstract":"A spreading code protocol for a spread spectrum packet radio network that involves the transmission of a synchronization sequence by the transmitter and the transmission of an echo by the receiver back to the transmitter during a link setup process is introduced. Due to the added complexity, the protocol is appropriate for networks with a relatively small number of terminals. As a result of the overhead incurred by the setup minipacket, the protocol will have high efficiency for a system with low data-rate transmitters and a large ratio of the packet transmission time to the propagation delay. Throughput results are given for two spreading code protocols.<<ETX>>","PeriodicalId":66166,"journal":{"name":"军事通信技术","volume":"15 1","pages":"355-359 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1988-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87771750","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.1988.13496
T. Blake, W. T. Etter, F. Goldstein
The author focuses on the issues and problems associated with expanding a distributed operating system's (DOS) clusters across a wide area network (WAN). This area is investigated to determine the feasibility of developing DOS and WAN coordination for improved system load balancing. Information and controls of interest to both the DOS and WAN are investigated. An initial discrete-event simulation of the DOS/WAN interaction potential is described. Ideas for further developing DOS/WAN interaction are discussed in the context of potential Air Force applications and anticipated developments within both the DOS and WAN technologies.<>
{"title":"The potential for integrated distributed operating system/communications network management design","authors":"T. Blake, W. T. Etter, F. Goldstein","doi":"10.1109/MILCOM.1988.13496","DOIUrl":"https://doi.org/10.1109/MILCOM.1988.13496","url":null,"abstract":"The author focuses on the issues and problems associated with expanding a distributed operating system's (DOS) clusters across a wide area network (WAN). This area is investigated to determine the feasibility of developing DOS and WAN coordination for improved system load balancing. Information and controls of interest to both the DOS and WAN are investigated. An initial discrete-event simulation of the DOS/WAN interaction potential is described. Ideas for further developing DOS/WAN interaction are discussed in the context of potential Air Force applications and anticipated developments within both the DOS and WAN technologies.<<ETX>>","PeriodicalId":66166,"journal":{"name":"军事通信技术","volume":"14 1","pages":"897-901 vol.3"},"PeriodicalIF":0.0,"publicationDate":"1988-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88070839","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.1988.13502
C. F. Bradshaw, G.S. Herman
The authors discuss the results of an investigation into improved error correction coding for satellite channels experiencing adjacent and cochannel interference, which constitute a nonstationary, non-Gaussian noise environment. The codes under study are those achieved by concatenation of a convolutional code and a Reed-Solomon code. Test results in the Gaussian channel showed geometrical error-length probability mass functions from a convolutional decoder. In the interference channel, test results showed a bimodal error-length mass function. It is shown that the amount of burst errors in either the geometrical or bimodal functions is proportional to the ratio of noise power density in the receiver and the receiver's phase-lock loop, respectively.<>
{"title":"An error coding for satellite channels with interference","authors":"C. F. Bradshaw, G.S. Herman","doi":"10.1109/MILCOM.1988.13502","DOIUrl":"https://doi.org/10.1109/MILCOM.1988.13502","url":null,"abstract":"The authors discuss the results of an investigation into improved error correction coding for satellite channels experiencing adjacent and cochannel interference, which constitute a nonstationary, non-Gaussian noise environment. The codes under study are those achieved by concatenation of a convolutional code and a Reed-Solomon code. Test results in the Gaussian channel showed geometrical error-length probability mass functions from a convolutional decoder. In the interference channel, test results showed a bimodal error-length mass function. It is shown that the amount of burst errors in either the geometrical or bimodal functions is proportional to the ratio of noise power density in the receiver and the receiver's phase-lock loop, respectively.<<ETX>>","PeriodicalId":66166,"journal":{"name":"军事通信技术","volume":"33 1","pages":"939-945 vol.3"},"PeriodicalIF":0.0,"publicationDate":"1988-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88314227","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.1988.13484
Yu-Teh Su
Several antijam (AJ) receivers for fast FH/MFSK (frequency-hopped M-ary frequency-shift-keyed signaling) have been proposed and analyzed. Most of these require side information such as noise power and signal energy so that the proper combination of signals from various diversity branches can be made. The author examines the behavior of a class of nonlinear diversity-combining receivers in the presence of worst-case band multitone jamming. This class of receivers does not require knowledge of signal or jammer and thus is not susceptible to measurement errors of the side information. A performance analysis is presented, and numerical results are discussed.<>
{"title":"Fast FH/MESK communications in band multitone jamming: performance of a class of self-normalizing receivers","authors":"Yu-Teh Su","doi":"10.1109/MILCOM.1988.13484","DOIUrl":"https://doi.org/10.1109/MILCOM.1988.13484","url":null,"abstract":"Several antijam (AJ) receivers for fast FH/MFSK (frequency-hopped M-ary frequency-shift-keyed signaling) have been proposed and analyzed. Most of these require side information such as noise power and signal energy so that the proper combination of signals from various diversity branches can be made. The author examines the behavior of a class of nonlinear diversity-combining receivers in the presence of worst-case band multitone jamming. This class of receivers does not require knowledge of signal or jammer and thus is not susceptible to measurement errors of the side information. A performance analysis is presented, and numerical results are discussed.<<ETX>>","PeriodicalId":66166,"journal":{"name":"军事通信技术","volume":"20 1","pages":"809-813 vol.3"},"PeriodicalIF":0.0,"publicationDate":"1988-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86319336","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.1988.13435
M. Haspel
The author addresses the problem of generating large sets of balanced preferred periodic binary sequences (-1, 1) of arbitrary length N with good correlation properties. The PRHL (phase randomization/hard limiting) algorithm for the generation of such sequences is described and compared to the coin-tossing approach. The PRHL algorithm is shown to yield considerable gain in efficiency in generation of sequences with the required properties. In addition, the sequences found have special average energy properties.<>
{"title":"A novel algorithm for efficient generation of large sets of good periodic binary sequences of arbitrary length","authors":"M. Haspel","doi":"10.1109/MILCOM.1988.13435","DOIUrl":"https://doi.org/10.1109/MILCOM.1988.13435","url":null,"abstract":"The author addresses the problem of generating large sets of balanced preferred periodic binary sequences (-1, 1) of arbitrary length N with good correlation properties. The PRHL (phase randomization/hard limiting) algorithm for the generation of such sequences is described and compared to the coin-tossing approach. The PRHL algorithm is shown to yield considerable gain in efficiency in generation of sequences with the required properties. In addition, the sequences found have special average energy properties.<<ETX>>","PeriodicalId":66166,"journal":{"name":"军事通信技术","volume":"34 ","pages":"483-487 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1988-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91552073","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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