MILCOM 2009 - 2009 IEEE Military Communications Conference最新文献_第10页

Estimating the number of frequency hopping interferers using spectral sensing with time and frequency offset measurements 利用时间和频率偏移测量的频谱传感估计跳频干扰的数量

MILCOM 2009 - 2009 IEEE Military Communications Conference Pub Date : 2009-10-18 DOI: 10.1109/MILCOM.2009.5379924

A. Gok, S. Joshi, J. Villasenor, D. Cabric

引用次数: 7

Concept for an all-digital satellite communications earth terminal 全数字卫星通信地球终端的概念

MILCOM 2009 - 2009 IEEE Military Communications Conference Pub Date : 2009-10-18 DOI: 10.1109/MILCOM.2009.5379774

Herald Beljour, R. Hoffmann, G. Michael, J. Shields, Imrul Sumit, C. Swenson, A. Willson

引用次数: 3

Quantifying the interference levels due to antenna pointing errors in satellite communications 卫星通信中天线指向误差引起的干扰水平的量化

MILCOM 2009 - 2009 IEEE Military Communications Conference Pub Date : 2009-10-18 DOI: 10.1109/MILCOM.2009.5380026

V. Weerackody, E. Cuevas

引用次数: 2

Dynamic Resource Allocation DAMA Alternatives Study for satellite communications systems 卫星通信系统动态资源分配DAMA方案研究

MILCOM 2009 - 2009 IEEE Military Communications Conference Pub Date : 2009-10-18 DOI: 10.1109/MILCOM.2009.5379941

H. Yao, Jeffrey W. McLamb, M. Mustafa, A. Narula-Tam, N. Yazdani

引用次数: 13

On the design of a modern broadband communications waveform for tactical air-to-ground links 战术空对地链路的现代宽带通信波形设计

MILCOM 2009 - 2009 IEEE Military Communications Conference Pub Date : 2009-10-18 DOI: 10.1109/MILCOM.2009.5380098

T. Halford, Mark Johnson, Sungill Kim, C. Kose

引用次数: 5

MUOS group and Common Channel power control MUOS组和公共通道功率控制

MILCOM 2009 - 2009 IEEE Military Communications Conference Pub Date : 2009-10-18 DOI: 10.1109/MILCOM.2009.5379746

Paul P. N. Yang, N. Butts, D. Bossler, C. Provance

引用次数: 0

Secure cooperative spectrum sensing for Cognitive Radio networks 认知无线电网络的安全协同频谱感知

MILCOM 2009 - 2009 IEEE Military Communications Conference Pub Date : 2009-10-18 DOI: 10.1109/MILCOM.2009.5379961

F. Hu, Shu Wang, Zhuo Cheng

引用次数: 14

EVM measurement techniques for MUOS MUOS的EVM测量技术

MILCOM 2009 - 2009 IEEE Military Communications Conference Pub Date : 2009-10-18 DOI: 10.1109/MILCOM.2009.5379776

A. Wang, Andrew M. McAllister

{"title":"EVM measurement techniques for MUOS","authors":"A. Wang, Andrew M. McAllister","doi":"10.1109/MILCOM.2009.5379776","DOIUrl":"https://doi.org/10.1109/MILCOM.2009.5379776","url":null,"abstract":"Physical layer simulations and analysis techniques were used to develop the Error Vector Magnitude (EVM) metric specifying transmitter signal quality. These tools also proved to be very useful in specifying lower level hardware unit performance and predicting Mobile User Objective System (MUOS) satellite 8-PSK transmitter performance before the hardware was built. However, the verification of EVM compliance at Ka frequencies posed challenges. Initial measurements showed unacceptably high levels of EVM which exceeded specification. Attempts to remove the contribution of the test equipment distortion and isolate the device-under-test distortion using commercial oscilloscope VSA software were unsuccessful. In this paper, we describe methods used to develop an accurate EVM measurement. The transmitted modulated signal was first recorded using a digitizing scope. In-house system identification, equalization, demodulation and analysis algorithms were then used to remove signal distortion due to the test equipment. Results from EVM measurements on MUOS single-channel hardware are given and performance is shown to be consistent with estimates made three years earlier. The results reduce technical risk and verify transmitter design by demonstrating signal quality.","PeriodicalId":338641,"journal":{"name":"MILCOM 2009 - 2009 IEEE Military Communications Conference","volume":"131 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124255098","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

Noncoherent physical-layer network coding using binary CPFSK modulation 使用二进制CPFSK调制的非相干物理层网络编码

MILCOM 2009 - 2009 IEEE Military Communications Conference Pub Date : 2009-10-18 DOI: 10.1109/MILCOM.2009.5380101

M. Valenti, D. Torrieri, Terry Ferrett

{"title":"Noncoherent physical-layer network coding using binary CPFSK modulation","authors":"M. Valenti, D. Torrieri, Terry Ferrett","doi":"10.1109/MILCOM.2009.5380101","DOIUrl":"https://doi.org/10.1109/MILCOM.2009.5380101","url":null,"abstract":"Physical-layer network coding is a high-throughput technique for communicating over the two-way relay channel, which consists of two terminals that communicate exclusively via an intermediate relay. An exchange of messages begins with both terminals transmitting binary data sequences simultaneously to the relay. The relay determines the modulo-2 sum of the sequences, which it modulates and broadcasts to the terminals. Since each terminal knows the information it transmitted, it can determine the information transmitted by the other terminal by subtracting its own information from the broadcast signal. Prior work on the topic of physical-layer network coding has assumed that the signals transmitted by the two terminals arrive at the relay with perfectly aligned phases, permitting coherent reception. In this paper, we relax the assumption of aligned phases and consider noncoherent reception of binary continuous-phase frequency-shift keying signals. A derivation of the relay receiver is given for varying amounts of channel state information, and results are provided showing the error performance of the proposed system without an outer error-correcting code and with an outer turbo code.","PeriodicalId":338641,"journal":{"name":"MILCOM 2009 - 2009 IEEE Military Communications Conference","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126623082","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: 26

Dircast: Flooding-reduced routing in MANETs without destination coordinates 定向:在没有目的地坐标的manet中减少泛洪路由

MILCOM 2009 - 2009 IEEE Military Communications Conference Pub Date : 2009-10-18 DOI: 10.1109/MILCOM.2009.5379953

Yali Wang, J. Garcia-Luna-Aceves

{"title":"Dircast: Flooding-reduced routing in MANETs without destination coordinates","authors":"Yali Wang, J. Garcia-Luna-Aceves","doi":"10.1109/MILCOM.2009.5379953","DOIUrl":"https://doi.org/10.1109/MILCOM.2009.5379953","url":null,"abstract":"The majority of the routing protocols designed and implemented to date for mobile ad hoc networks (MANET) rely on flooding of route requests for the establishment of routes on demand, flooding of topology information, or the hop-by-hop dissemination of distances or paths for each destination. The signaling overhead incurred with these strategies consumes excessive amounts of the scarce bandwidth available in a MANET as the number of nodes and the number of information flows increase. We introduce Dircast as an alternative for routing in MANETs. Dircast assumes that each node knows its own geographical coordinates and the geometry of the terrain in which the network is deployed. To find the route to a destination, a node selects a limited number of relays to forward a route request mesage based on their coordinates and the boundary vertices of the terrain if the prior location of the destinartion is unknown, or based on the prior location of the destination if it is known. If the destination is reached, a route reply is sent back to the source containing its coordinates. We compare Dircast with OLSR and AODV, which are representatives of traditional proactive and on-demand routing approaches in MANETs, and show that Dircast attains much lower routing overhead, which also leads to better delivery rates and shorter end-to-end delays.","PeriodicalId":338641,"journal":{"name":"MILCOM 2009 - 2009 IEEE Military Communications Conference","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126118977","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