MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341)最新文献_第4页

Comparison of direct-sequence spread-spectrum multiple-access systems with QPSK data modulation 采用QPSK数据调制的直接序列扩频多址系统的比较

MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341) Pub Date : 1999-10-31 DOI: 10.1109/MILCOM.1999.822745

T. Macdonald, M. Pursley

引用次数: 0

An advanced middleware architecture for secure and survivable mobile C4I systems 用于安全和可生存的移动C4I系统的高级中间件体系结构

MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341) Pub Date : 1999-10-31 DOI: 10.1109/MILCOM.1999.822734

R. Browne, J. Valente, S. Hariri

引用次数: 4

The 1.2 kbps/2.4 kbps MELP speech coding suite with integrated noise pre-processing 集成噪声预处理的1.2 kbps/2.4 kbps MELP语音编码套件

MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341) Pub Date : 1999-10-31 DOI: 10.1109/MILCOM.1999.821443

J. Collura, D. F. Brandt, D. Rahikka

{"title":"The 1.2 kbps/2.4 kbps MELP speech coding suite with integrated noise pre-processing","authors":"J. Collura, D. F. Brandt, D. Rahikka","doi":"10.1109/MILCOM.1999.821443","DOIUrl":"https://doi.org/10.1109/MILCOM.1999.821443","url":null,"abstract":"Previous advances in speech enhancement and noise pre-processing algorithms have dramatically improved the quality and intelligibility of speech signals, both in the presence of acoustic noise as well as in benign environments. The use of speech enhancement in combination with voice coding algorithms and applied to governmental wireless communications systems is an area of increasing importance. In March 1996, the US government selected the 2.4 kbps MELP speech coding algorithm for applications which require high quality/intelligibility narrow band speech coding. In March of 1999, a companion 1.2 kbps MELP speech coding algorithm was unveiled. This additional MELP rate was added to satisfy disadvantaged transmission requirements such as survivable SATCOMs or high latitude HF radio links. The combined 1.2 kbps/2.4 kbps MELP algorithm incorporates an integrated speech enhancement algorithm as a front-end process to provide superior performance in harsh acoustic noise environments. This paper introduces the integrated speech enhancement 1.2 kbps/2.4 kbps MELP speech coding algorithmic suite, and presents the first available test data for the combined algorithm. Finally, a discussion of the test conditions, results and related issues are presented.","PeriodicalId":334957,"journal":{"name":"MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341)","volume":"732 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":"117173822","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: 16

Naval Space Command's top functional requirements for commercial SATCOM 海军航天司令部对商业卫星通信的最高功能要求

MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341) Pub Date : 1999-10-31 DOI: 10.1109/MILCOM.1999.821449

P. Hampton

{"title":"Naval Space Command's top functional requirements for commercial SATCOM","authors":"P. Hampton","doi":"10.1109/MILCOM.1999.821449","DOIUrl":"https://doi.org/10.1109/MILCOM.1999.821449","url":null,"abstract":"Satellite communications (SATCOM) provides the only over-the-horizon information medium capable of delivering to afloat naval forces the required voice, video, imagery and data products and applications. Existing and planned military SATCOM initiatives presently cannot fulfill these operational requirements; as a consequence, commercial alternatives are utilized as a near-term bridge and cost-effective solution. The US Navy has used CNO Special Project Challenge Athena (CA) as a proof of concept to lease commercial satellite transponders and associated commercial earth station service. This program has sought to integrate commercialized agencies/resources with DOD shore based architecture ground facilities to provide high data rate (T-1) information to large deck ships in order to alleviate the bandwidth shortfall. The Navy's philosophical tradeoff is that a \"lease methodology\" is much more operationally effective (in the near term)-than purchasing or building a satellite constellation. Nevertheless, the Navy's objective is to pursue commercial SATCOM, looking for commercial capabilities that can satisfy its unique SATCOM requirements. So, how does the Navy identify and quantify its unique requirements and match them against existing and/or emerging commercial SATCOM system's capabilities so that optimized bang for the \"premium\" buck can be obtained? Is there a fit for the Navy's requirements in the commercial SATCOM arena? This paper serves to identify the most important characteristics of those Navy unique requirements that exist for commercial SATCOM; i.e. to identify where they are needed, why they are needed, and how the fleet will use them. The intent of this paper is to provide industry with a better understanding of the hurdles the Navy faces in identifying current and future SATCOM requirements that commercial SATCOM could potentially fill.","PeriodicalId":334957,"journal":{"name":"MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341)","volume":"9 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":"117209600","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

Government use of commercial satellite systems for disaster response 政府使用商业卫星系统进行灾害响应

MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341) Pub Date : 1999-10-31 DOI: 10.1109/MILCOM.1999.822654

G. Luká

{"title":"Government use of commercial satellite systems for disaster response","authors":"G. Luká","doi":"10.1109/MILCOM.1999.822654","DOIUrl":"https://doi.org/10.1109/MILCOM.1999.822654","url":null,"abstract":"Commercial satellite communications services are undergoing major changes. Service is now available all over the world and the user terminals are becoming smaller and lighter-the capabilities offered in the terminals of the early 1980s that weighed several hundred pounds are now available in nearly pocket sized terminals that weigh approximately one pound. The new terminals also boast omni-directional antennas making them easier to use. Some new mobile satellite systems are already providing service, while many more are under development or being deployed. Advances in commercial mobile communications technology, the increasing demand for communications access from remote areas, and economic constraints have led many Federal agencies to consider commercial satellite services in lieu of private systems to satisfy some of their communications needs. Agencies must consider several factors when determining if a particular service offering is appropriate for disaster response communications. Among these are the communications requirements that can and cannot be satisfied with the service, the reliability and cost effectiveness of the service, and the congestion users are likely to experience with the service. However, for some requirements, commercial satellite communications show a great deal of promise and benefit for disaster response communications.","PeriodicalId":334957,"journal":{"name":"MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341)","volume":"41 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":"128366889","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

Modification of ETFTP for MPEG-4 wireless video transport 用于MPEG-4无线视频传输的ETFTP的修改

MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341) Pub Date : 1999-10-31 DOI: 10.1109/MILCOM.1999.821398

Kun Yu, D. Onishi, R.E. Van Dyck

引用次数: 2

Modeling and simulation of Advanced EHF efficiency enhancements 先进EHF效率增强的建模与仿真

MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341) Pub Date : 1999-10-31 DOI: 10.1109/MILCOM.1999.822703

D. Fritz, D. Moy, R. Nichols

引用次数: 7

Performance analsis of hybrid DS-SFH/MSK spread-spectrum system under multitone jamming 多音干扰下DS-SFH/MSK混合扩频系统性能分析

MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341) Pub Date : 1999-10-31 DOI: 10.1109/MILCOM.1999.822746

Zheng Hai-ou, Zhang Nai-tong

引用次数: 4

Simulation of large-scale heterogeneous communication systems 大规模异构通信系统的仿真

MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341) Pub Date : 1999-10-31 DOI: 10.1109/MILCOM.1999.821433

L. Bajaj, M. Takai, R. Ahuja, R. Bagrodia

引用次数: 39

Predicting the performance of M-ary codes in an unknown multipath environment 在未知的多路径环境下预测m码的性能

MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341) Pub Date : 1999-10-31 DOI: 10.1109/MILCOM.1999.822642

Steve Halford, Karen Halford, Mark Webster

{"title":"Predicting the performance of M-ary codes in an unknown multipath environment","authors":"Steve Halford, Karen Halford, Mark Webster","doi":"10.1109/MILCOM.1999.822642","DOIUrl":"https://doi.org/10.1109/MILCOM.1999.822642","url":null,"abstract":"Wireless communication is a critical link in our global military communication system. In scenarios ranging from the battlefield to the White House, we must be able to send information reliably without a cumbersome infrastructure. Wireless environments typically contain a large amount of multipath interference. Therefore, a waveform that is transmitted through a wireless channel must be robust to multipath. With this in mind, Harris Corporation and Lucent Corporation proposed the complementary code keying (CCK) waveform for the high data rate IEEE 802.11 WLAN standard. The CCK waveform has proven to be robust in a harsh multipath environment. Harris Corporation is implementing this waveform in their PRISMO (C) chip which will be deployed by Harris GCSD in a number of military applications including inter- and intra-ship communication and military telemedicine and telemaintenance. This paper presents a new performance measure based on the distance between M-ary codes in a multipath environment. Significantly, this measure does not depend on knowledge of the multipath environment. Consequently, this measure is well suited for evaluating codes to be used in the many scenarios envisioned for wireless LANs. In the paper, this measure is described and then used to compare a number of M-ary codes. The results of this performance measure as well as performance simulations show that the CCK waveform performs well in a variety of multipath environments.","PeriodicalId":334957,"journal":{"name":"MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341)","volume":"74 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":"130652959","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: 10