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MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341)最新文献

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Modelling the performance of an all-informed net which incorporates distributed dynamic channel assignment 建立了包含分布式动态信道分配的全信息网络的性能模型
MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341) Pub Date : 1999-10-31 DOI: 10.1109/MILCOM.1999.821355
D. Grace, T. Tozer, A. Burr
{"title":"Modelling the performance of an all-informed net which incorporates distributed dynamic channel assignment","authors":"D. Grace, T. Tozer, A. Burr","doi":"10.1109/MILCOM.1999.821355","DOIUrl":"https://doi.org/10.1109/MILCOM.1999.821355","url":null,"abstract":"The performance of an all-informed net communications architecture which employs a distributed channel assignment scheme is considered using both analysis and simulation for a terrestrial radio environment. Simulation is carried out using a commercial protocol modelling tool and a novel technique is developed which reduces simulation times significantly. It is found that the call blocking performance of the architecture is determined largely by lognormal shadowing, if the number of nodes per net is large and it is required that all nodes can simultaneously receive voice calls. However, the call dropping performance is largely invariant to the number of nodes per net, providing there are at least 20 users per net.","PeriodicalId":334957,"journal":{"name":"MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126610504","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
An analysis of the Viterbi decoder error statistics for ATM and TCP/IP over satellite communication 卫星通信中ATM和TCP/IP的维特比解码器误差统计分析
MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341) Pub Date : 1999-10-31 DOI: 10.1109/MILCOM.1999.822704
J.R. Heissler, Y. Barsoum, R. Condello
{"title":"An analysis of the Viterbi decoder error statistics for ATM and TCP/IP over satellite communication","authors":"J.R. Heissler, Y. Barsoum, R. Condello","doi":"10.1109/MILCOM.1999.822704","DOIUrl":"https://doi.org/10.1109/MILCOM.1999.822704","url":null,"abstract":"Convolutional encoding and Viterbi decoding are error correction techniques widely used to improve the bit error rate (BER) performance over satellite communications (SATCOM) systems. The error statistics generated with these techniques are not random, but instead bursty. In today's communications infrastructure, SATCOM terminals are used to provide the range extension for tactical communication systems. These tactical communications systems employ either asynchronous transfer mode (ATM) switching and/or Internet protocol IP) technology. Both ATM and IP require high quality channels with BERs on the order of 10/sup -8/ or better. Traditional SATCOM channels only provide BER performance on the order of 10/sup -5/. Concatenated codes are one solution for improving the quality of SATCOM links. But the burstness of the Viterbi decoding limits the effectiveness of the concatenated codes. Performance can be improved by including an interleaver to disperse the Viterbi error bursts. We present the Viterbi decoder's error burst statistics (i.e. burst size and the interarrival times) as a function of the signal to noise ratio. Given these statistics, the performance of two different tactical communications systems are assessed: (1) an ATM based switching system and (2) an IP based system.","PeriodicalId":334957,"journal":{"name":"MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126883859","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
Micro-electro-mechanical systems (MEMS) for WDM optical-crossconnect networks WDM光交叉连接网络的微机电系统(MEMS)
MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341) Pub Date : 1999-10-31 DOI: 10.1109/MILCOM.1999.821344
L.Y. Lin, E. Goldstein
{"title":"Micro-electro-mechanical systems (MEMS) for WDM optical-crossconnect networks","authors":"L.Y. Lin, E. Goldstein","doi":"10.1109/MILCOM.1999.821344","DOIUrl":"https://doi.org/10.1109/MILCOM.1999.821344","url":null,"abstract":"MEMS (micro-electro-mechanical systems) have shown promise for optical crossconnects in WDM networks. We describe various MEMS optical-switching technologies, their successes in implementing important optical-networking functionalities, and future perspectives.","PeriodicalId":334957,"journal":{"name":"MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127659211","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: 15
The on-orbit antenna pointing calibration of Milstar satellite gimbaled parabolic antennas 军星卫星框架抛物面天线在轨指向标定
MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341) Pub Date : 1999-10-31 DOI: 10.1109/MILCOM.1999.822755
H.G. Kistosturian
{"title":"The on-orbit antenna pointing calibration of Milstar satellite gimbaled parabolic antennas","authors":"H.G. Kistosturian","doi":"10.1109/MILCOM.1999.822755","DOIUrl":"https://doi.org/10.1109/MILCOM.1999.822755","url":null,"abstract":"To minimize enemy jamming impacts and to maximize communications coverage of friendly forces, the modern military satellite communications systems require accurate determination of the antenna Earth coverage areas. Also, an accurate antenna pointing system is required to satisfy the link budget requirements on the edge of antenna coverage. The antenna pointing accuracy can be improved considerably by on-orbit calibration of the diurnal satellite antenna pointing misalignment error which arises from the combination of several error sources, such as structural thermal deformations, the attitude determination system, the antenna ground alignment procedure, and the antenna gimbal system. This paper describes how an approximately tenfold reduction in pointing error can be achieved from on-orbit antenna pointing calibration of the gimbaled antenna of the Milstar satellite. In addition, the paper describes the process that was implemented to achieve these results.","PeriodicalId":334957,"journal":{"name":"MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129037155","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: 4
Recursive semi-blind channel identification for wideband CDMA communications 宽带CDMA通信的递归半盲信道识别
MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341) Pub Date : 1999-10-31 DOI: 10.1109/MILCOM.1999.822718
T. Hong Li, M. Zoltowski
{"title":"Recursive semi-blind channel identification for wideband CDMA communications","authors":"T. Hong Li, M. Zoltowski","doi":"10.1109/MILCOM.1999.822718","DOIUrl":"https://doi.org/10.1109/MILCOM.1999.822718","url":null,"abstract":"A recursive semi-blind channel identification method is proposed for wideband CDMA communication systems based upon the cross-relation of Xu, Liu, Tong, and Kailath (1995), as well as the pilot symbols, in order to reduce the need for pilot symbols in coherent detection. After an equivalent time-invariant single-input multi-output channel model is created for the de-spreaded signals through employing multiple antennas at receiver site, both the cross-relation and the pilot symbols are applied to the equivalent linear time-invariant single-input multi-output channel model to derive a recursive semi-blind channel identification solution. Simulations are performed to evaluate the recursive semi-blind channel identification method's applicability to the third-generation wideband CDMA communication systems.","PeriodicalId":334957,"journal":{"name":"MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129056216","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
Iterative demodulation and decoding of trellis coded CPM 网格编码CPM的迭代解调与译码
MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341) Pub Date : 1999-10-31 DOI: 10.1109/MILCOM.1999.821414
K. Narayanan
{"title":"Iterative demodulation and decoding of trellis coded CPM","authors":"K. Narayanan","doi":"10.1109/MILCOM.1999.821414","DOIUrl":"https://doi.org/10.1109/MILCOM.1999.821414","url":null,"abstract":"Interleaved trellis coded systems with continuous phase modulation (TCCPM) are considered. It is shown that the combination of a trellis code, interleaver and the CPM modulator results in a significantly enhanced distance spectrum for the transmitted signals. Upper bounds on the bit error rate are derived by considering the combination of the trellis code, interleaver and the CPM modulator as serially concatenated code. Finally, iterative coherent and non-coherent receivers are proposed and their performance is evaluated through computer simulations.","PeriodicalId":334957,"journal":{"name":"MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341)","volume":"2009 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127324320","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
Tracking parameter selection for MIL-STD-188-181B multi-h continuous phase modulation MIL-STD-188-181B多小时连续调相跟踪参数选择
MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341) Pub Date : 1999-10-31 DOI: 10.1109/MILCOM.1999.821422
K. Kreitzer
{"title":"Tracking parameter selection for MIL-STD-188-181B multi-h continuous phase modulation","authors":"K. Kreitzer","doi":"10.1109/MILCOM.1999.821422","DOIUrl":"https://doi.org/10.1109/MILCOM.1999.821422","url":null,"abstract":"With the adoption of MIL-STD-188-181B on 20 March 1999, multi-h continuous phase modulation (CPM) became a mandatory requirement of U.S. military UHF SATCOM terminals. A tracking mode bit-error rate simulation was developed to assist in the selection of various design parameters of a multi-h CPM demodulation tracking loop. Simulation results are given for these design parameters enabling a multi-h CPM modem designer to achieve the desired bit-error rate performance.","PeriodicalId":334957,"journal":{"name":"MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127361636","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
Adaptive optimization of receiver chip waveform for DS/SSMA with random spreading sequences 随机扩频DS/SSMA接收机芯片波形的自适应优化
MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341) Pub Date : 1999-10-31 DOI: 10.1109/MILCOM.1999.821362
Joon Ho Cho, J. Lehnert
{"title":"Adaptive optimization of receiver chip waveform for DS/SSMA with random spreading sequences","authors":"Joon Ho Cho, J. Lehnert","doi":"10.1109/MILCOM.1999.821362","DOIUrl":"https://doi.org/10.1109/MILCOM.1999.821362","url":null,"abstract":"We consider the receiver optimization problem in asynchronous direct-sequence spread-spectrum multiple-access (DS/SSMA) communications with random spreading sequences. It is shown that the minimum average bit error rate of a correlation receiver is achieved by adaptively optimizing the receiver chip waveform depending on the energy and delay profiles of interfering users. Instead of directly solving an integral equation which gives the optimum chip waveform, we discretize the receiver chip waveform and develop a simple adaptive algorithm to find an approximate solution. Analytical predictions, as well as numerical results, show that the proposed receiver achieves a significant performance improvement over the conventional correlation receiver by effectively suppressing the multiple-access interference.","PeriodicalId":334957,"journal":{"name":"MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341)","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133674104","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
Multicast transmission with nonuniform phase-shift-key modulation and convolutional coding over Rayleigh fading channels 非均匀移相键调制和卷积编码在瑞利衰落信道上的多播传输
MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341) Pub Date : 1999-10-31 DOI: 10.1109/MILCOM.1999.822693
M. Pursley, John M. Shea
{"title":"Multicast transmission with nonuniform phase-shift-key modulation and convolutional coding over Rayleigh fading channels","authors":"M. Pursley, John M. Shea","doi":"10.1109/MILCOM.1999.822693","DOIUrl":"https://doi.org/10.1109/MILCOM.1999.822693","url":null,"abstract":"In this paper we present simple closed-form expressions for the probability of error for M-ary phase-shift key (M-PSK) signaling over a channel with additive white Gaussian noise and nonselective Rayleigh fading. These expressions can be used to analyze the performance of standard uniform M-PSK constellations and nonuniform M-PSK constellations. Nonuniform M-PSK has previously been shown to be useful for multimedia communication, multicast transmission, and adaptive signaling. We analyze several systems that employ nonuniform M-PSK for multicast transmission over Rayleigh fading channels, and we determine the performance of nonuniform, M-PSK with convolutional coding.","PeriodicalId":334957,"journal":{"name":"MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116939146","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: 4
Optimal packet size via marginal utility image compression and expansion delay minimization for theater of war and theater missile defense: congestion controlled combination protocol 战区和战区导弹防御中基于边际效用的图像压缩和扩展延迟最小化的最优数据包大小:拥塞控制组合协议
MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341) Pub Date : 1999-10-31 DOI: 10.1109/MILCOM.1999.822685
C. Niznik
{"title":"Optimal packet size via marginal utility image compression and expansion delay minimization for theater of war and theater missile defense: congestion controlled combination protocol","authors":"C. Niznik","doi":"10.1109/MILCOM.1999.822685","DOIUrl":"https://doi.org/10.1109/MILCOM.1999.822685","url":null,"abstract":"The CCC (congestion controlled combination) protocol, realizing the simulation characteristics of the theater missile defense SDIO (BMDO) packet ground to satellite communication protocols and the theater of war SG/ATM/DSI or SG/ATM/Internet PDU communication, requires the specialized optimal packet length delay minimization. The MMCR protocol will provide these parameters to the TOW protocol, by the linkage of the MMCR protocol to the UIS protocol in the TMD protocol. The minimized packet delay developed for optimal, specialized PDU sizes for war games in the MMCR protocol contains the theatre of war image compression and expansion function in the Lagrange multiplier, contained within the UIS protocol gateway characteristics. The MMCR protocol enables optimal SG/ATM/DSI or SG/ATM/INTERNET access during STOW (synthetic theatre of war) games. This optimal PDU size obtained from the Lagrange multiplier i.e. marginal utility in game theory, optimization for minimizing delay, imaging reduction and expansion factor, enables representation of the object oriented code implementation imaging criteria for various sections of the CCC protocol geometric software structure planes.","PeriodicalId":334957,"journal":{"name":"MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341)","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128160630","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: 4
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