MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341)最新文献_第7页

Low cost HF receiver using /spl pi/-constellations, soft convolutional turbo decoder and real channel estimator 低成本高频接收机采用/spl pi/-星座，软卷积涡轮解码器和真实信道估计

MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341) Pub Date : 1999-10-31 DOI: 10.1109/MILCOM.1999.822697

F. Hamon, M. Lecomte, M. Testard

引用次数: 1

Modeling performance improvements in Milstar MDR networks with demand assigned multiple access (DAMA) 基于需求分配多址(DAMA)的Milstar MDR网络建模性能改进

MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341) Pub Date : 1999-10-31 DOI: 10.1109/MILCOM.1999.821424

D. Griffith, R. Johnson, M. Unkauf, A. Moy

{"title":"Modeling performance improvements in Milstar MDR networks with demand assigned multiple access (DAMA)","authors":"D. Griffith, R. Johnson, M. Unkauf, A. Moy","doi":"10.1109/MILCOM.1999.821424","DOIUrl":"https://doi.org/10.1109/MILCOM.1999.821424","url":null,"abstract":"Raytheon has developed a demand assignment multiple access (DAMA) algorithm that is used by the SMART-T Milstar ground terminal to dynamically allocate satellite resources to users in a mobile subscriber equipment (MSE) network on a call-by-call basis. In addition to providing range extension for MSE, the DAMA algorithm is shown to allow more efficient bandwidth usage and reduced latency times for calls by allowing Secure, Mobile, Anti-Jam Reliable Tactical Terminals (SMART-Ts) to establish direct connections independent of the network topology. An object-oriented simulation of MSE enhanced with DAMA-capable SMART-Ts using the OPNET simulation tool is described and the utility of the DAMA approach is demonstrated. Some of the features of our models of MSE/DAMA networks are discussed and it is shown that applying DAMA techniques results in better utilization of satellite resources while meeting grade of service (GoS) requirements. Using this set of models, improvements to the DAMA algorithm such as making it interoperable with asynchronous transfer mode (ATM) are also discussed.","PeriodicalId":334957,"journal":{"name":"MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341)","volume":"20 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":"117067211","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

Supplement multi-media services for ACeS 补充ACeS的多媒体服务

MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341) Pub Date : 1999-10-31 DOI: 10.1109/MILCOM.1999.821330

Youyun Xu, Wentao Song, Han-wen Luo

引用次数: 0

Connection admission control for differentiating priority traffic on public networks 用于区分公网上优先级流量的连接允许控制

MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341) Pub Date : 1999-10-31 DOI: 10.1109/MILCOM.1999.821434

C. C. Beard, V. Frost

{"title":"Connection admission control for differentiating priority traffic on public networks","authors":"C. C. Beard, V. Frost","doi":"10.1109/MILCOM.1999.821434","DOIUrl":"https://doi.org/10.1109/MILCOM.1999.821434","url":null,"abstract":"The public network has traditionally been unable to adequately deal with defense and disaster recovery communications, because overloads that occur during crises cause degraded resource access to all users, no matter how important. For public broadband networks to be effective for defense and disaster recovery multimedia communications, they must dynamically recognize some connections as having greater importance than others and allocate resources accordingly. A new approach to connection admission control is proposed that uses an upper limit policy to optimize the admission of connections based on the weighted sum of blocking across traffic classes. This optimization approach can be used for arbitrarily large networks and numbers of traffic classes and results in a very simple algorithm that could be implemented on standard network hardware. This work is also the first to demonstrate that the use of an upper limit policy is superior to traditional approaches of adding extra capacity or partitioning capacity, both in the amount of resources required and in sensitivity to load variations. An upper limit policy is also shown to be much faster to implement where a large overload occurs from a disaster event.","PeriodicalId":334957,"journal":{"name":"MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341)","volume":"45 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":"115268101","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

Doppler measurement and compensation in mobile satellite communications systems 移动卫星通信系统中的多普勒测量与补偿

MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341) Pub Date : 1999-10-31 DOI: 10.1109/MILCOM.1999.822695

Qingchong Liu

引用次数: 10

An algorithmic approach to preamble sequence optimization 前言序列优化的一种算法

MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341) Pub Date : 1999-10-31 DOI: 10.1109/MILCOM.1999.821352

R. Johnson, M. Jorgenson, B. Moreland

{"title":"An algorithmic approach to preamble sequence optimization","authors":"R. Johnson, M. Jorgenson, B. Moreland","doi":"10.1109/MILCOM.1999.821352","DOIUrl":"https://doi.org/10.1109/MILCOM.1999.821352","url":null,"abstract":"When using coherent demodulation techniques, it is often necessary to include sequences of known symbols within the transmission in order to facilitate synchronization and, when advanced equalization algorithms are employed, channel estimation. In many cases it is possible to employ well-known sequences with desirable properties for use in synchronization. In some cases, however, to remove the overt signature that the repeated use of these known sequences causes, pseudo-random sequences are required. The conventional method of choosing such pseudo-random sequences relies on an exhaustive search algorithm. However, the computational requirements for a search of moderate length sequences are immense. In practice, for sequences of moderate length, the usual procedure is to evaluate sequences generated at random against several well-defined criteria. We present a computationally efficient method for deriving PSK sequences with good properties for signal detection and channel estimation. From an initial random sequence, a gradient descent algorithm is used to iteratively improve the sequence, based on the evaluation criteria. This algorithmic approach is shown to reduce the time required to generate a set of sequences, meeting the specified performance criteria, by more than two orders of magnitude in some cases. The method is particularly applicable to the design of pseudorandom sequences for preamble and training segments in serial-tone HF waveforms. Although the technique is general in nature, examples provided focus on the design of 8PSK sequences for serial-tone HF waveforms.","PeriodicalId":334957,"journal":{"name":"MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341)","volume":"374 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":"121752942","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

Performance optimization of VLSI transceivers for low-energy communications systems 低能耗通信系统中VLSI收发器的性能优化

MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341) Pub Date : 1999-10-31 DOI: 10.1109/MILCOM.1999.821440

SystemsAndrew P. Worthen, Sangjin Hong, Riten Gupta, Wayne E. StarkDepartment

引用次数: 9

Security broker for multimedia wireless LANs: design, implementation and testbed 多媒体无线局域网的安全代理:设计、实现和试验台

MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341) Pub Date : 1999-10-31 DOI: 10.1109/MILCOM.1999.821412

A. Ganz, Se Hyun Park, Z. Ganz

{"title":"Security broker for multimedia wireless LANs: design, implementation and testbed","authors":"A. Ganz, Se Hyun Park, Z. Ganz","doi":"10.1109/MILCOM.1999.821412","DOIUrl":"https://doi.org/10.1109/MILCOM.1999.821412","url":null,"abstract":"To secure interactive multimedia applications in wireless LANs (WLANs) it is pertinent to implement a number of security services such as authentication, key exchange and real-time encryption/decryption. WLANs, though, present a complex and challenging environment for implementing such security services since these services may deplete the limited network resources and increase the burden of supporting quality of service for multimedia applications. Consequently, a broker is needed to mediate proper security considering inputs such as user security requirements, user security literacy, available network resources, and security routines performance. In this paper we introduce a security broker that we have designed to fulfil these complex mediation needs. This broker is implemented in software and tested in a wireless LAN testbed. The reported security broker design and implementation considers the wireless LAN environment as well as the multimedia applications' quality of service requirements such as delay and throughput. We also introduce an inline encryption/decryption software that encrypts/decrypts traffic on the fly. Our experiments show that in cases where relatively modern computers are used with properly chosen standard encryptors, then such computers can sustain the throughput and security requirements of interactive multimedia applications for WLANs such as telephone-quality audio, video conferencing, and MPEG video.","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":"125550638","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: 7

Emerging advanced intelligent network (AIN) for 21st century warfighters 面向21世纪作战人员的新兴先进智能网络(AIN)

MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341) Pub Date : 1999-10-31 DOI: 10.1109/MILCOM.1999.822679

W. W. Chao

引用次数: 6

Performance of a CDMA-based satellite communication system with phase noise 相位噪声下基于cdma的卫星通信系统性能研究

MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341) Pub Date : 1999-10-31 DOI: 10.1109/MILCOM.1999.822757

J. Kim

引用次数: 3