2001 MILCOM Proceedings Communications for Network-Centric Operations: Creating the Information Force (Cat. No.01CH37277)最新文献

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Performance analysis of maximum likelihood blind spreading factor detection using FOSSIL 基于FOSSIL的最大似然盲扩展因子检测性能分析
L. Tsaur, D.C. Lee
{"title":"Performance analysis of maximum likelihood blind spreading factor detection using FOSSIL","authors":"L. Tsaur, D.C. Lee","doi":"10.1109/MILCOM.2001.986104","DOIUrl":"https://doi.org/10.1109/MILCOM.2001.986104","url":null,"abstract":"We describe and propose the usage of a new codeword set to achieve the symbol rate (or spreading factor) adaptation in a CDMA communication network. Then we analyze the performance of a symbol-by-symbol, non-coherent, maximum-likelihood, blind spreading factor detector. The probability of false detection, which is also referred as the detection error rate (DER) in other studies, is analyzed for a multi-rate CDMA communication link with AWGN. The analysis shows that when the SNR is greater than 17 dB, the probability of false detection is around 10/sup -6/.","PeriodicalId":136537,"journal":{"name":"2001 MILCOM Proceedings Communications for Network-Centric Operations: Creating the Information Force (Cat. No.01CH37277)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116462808","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
The waveform description language: moving from implementation to specification 波形描述语言:从实现到规范
E. Willink, E. Willink
{"title":"The waveform description language: moving from implementation to specification","authors":"E. Willink, E. Willink","doi":"10.1109/MILCOM.2001.985791","DOIUrl":"https://doi.org/10.1109/MILCOM.2001.985791","url":null,"abstract":"Many current research and development activities make significant contributions to the quality of some particular implementation approach. We describe the waveform description language, in which the best characteristics of a variety of distinct programming approaches are exploited so that standard implementation domain practices can be applied in the specification domain. A single WDL specification may be refined to support semi-automated conversion to a variety of implementations. A WDL specification avoids the ambiguities and contradictions characteristic of many conventional specifications with an underlying formality that remains accessible and familiar to programmers.","PeriodicalId":136537,"journal":{"name":"2001 MILCOM Proceedings Communications for Network-Centric Operations: Creating the Information Force (Cat. No.01CH37277)","volume":"509 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122757859","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: 18
Multi-band integrated satellite terminal (MIST) - a key to future SOTM for the Army 多波段综合卫星终端(MIST)——陆军未来SOTM的关键
G. Comparetto, B. Hall
{"title":"Multi-band integrated satellite terminal (MIST) - a key to future SOTM for the Army","authors":"G. Comparetto, B. Hall","doi":"10.1109/MILCOM.2001.985809","DOIUrl":"https://doi.org/10.1109/MILCOM.2001.985809","url":null,"abstract":"The US Army's communications capability must keep pace with the evolution of a globally deployable joint task force (JTF) and force projection army, while supporting forced entry and contingency operations. The warfighter must have the freedom and flexibility to move quickly on the battlefield using a communications terminal that is tactically responsive, mobile and interoperable and provides SATCOM-on-the-move (SOTM) and SATCOM-on-the-pause (SOTP) capability. PM MILSATCOM is helping to define this next generation army SATCOM terminal that is referred to as the multi-band integrated satellite terminal (MIST) and is currently scheduled to be fielded in several phases out to 2014. In so doing, PM MILSATCOM initiated several studies to define the MIST program better, help formulate the acquisition strategy, validate the MIST funding schedule and initiate Government cost estimates for the MIST program. The purpose of this paper is to summarize the key findings of the study performed by the MITRE Corporation in support of PM MILSATCOM. Our focus here is to summarize the notional terminal architecture design options postulated in that study and to identify the key technology areas that need to be advanced in order to ensure successful operation of the MIST terminal.","PeriodicalId":136537,"journal":{"name":"2001 MILCOM Proceedings Communications for Network-Centric Operations: Creating the Information Force (Cat. No.01CH37277)","volume":"191 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122484454","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
Low power TDMA in large wireless sensor networks 大型无线传感器网络中的低功耗TDMA
G. Pei, C. Chien, Rockwell
{"title":"Low power TDMA in large wireless sensor networks","authors":"G. Pei, C. Chien, Rockwell","doi":"10.1109/MILCOM.2001.985817","DOIUrl":"https://doi.org/10.1109/MILCOM.2001.985817","url":null,"abstract":"In this paper we present a novel TDMA scheme for a large population of sensors interconnected by a wireless multihop network. Applications of this wireless sensor network include battlefield surveillance, space exploration and condition based monitoring. Key characteristics of this system are the large number of sensor nodes and the need to rely on battery operation for a long period of time. Since communication is a major consumer of energy, low power communication protocols play a critical role in wireless sensor networks and have significant impact on the overall energy dissipation of these networked systems. This paper focuses on an energy efficient TDMA protocol, power aware clustered TDMA (PACT), that adapts the duly cycle to the user traffic. In other words, the radio is powered off if the network is inactive. Moreover, we apply passive clustering to take advantage of the redundant dense topology and prolong the lifetime of the entire network even further. At a given time, only a subset of network nodes (i.e., cluster heads and gateways) participates in the communication. The role of cluster heads and gateways is rotated according to their energy levels. The clustering requires no explicit control messages and therefore incurs negligible energy overhead. Using the proposed protocol, simulation and analytical results show significant improvement in energy saving and network lifetime.","PeriodicalId":136537,"journal":{"name":"2001 MILCOM Proceedings Communications for Network-Centric Operations: Creating the Information Force (Cat. No.01CH37277)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122202651","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: 205
A de-correlated delay locked loop for direct sequence spread spectrum systems in a multi-user environment 多用户环境下直接序列扩频系统的去相关延时锁环
W. Wong
{"title":"A de-correlated delay locked loop for direct sequence spread spectrum systems in a multi-user environment","authors":"W. Wong","doi":"10.1109/MILCOM.2001.986082","DOIUrl":"https://doi.org/10.1109/MILCOM.2001.986082","url":null,"abstract":"Traditional delay locked loops are well-proven techniques for tracking the pseudo noise sequence for a single user condition. However, serious degradations may occur in a multi-user environment. For example, the loop may become unstable under conditions of large multiple access interference. A novel de-correlated delay locked loop is presented for synchronous direct sequence spread spectrum systems. It de-correlates the MAI caused by interfering users at the zero timing offset instant and achieves a better S curve. Computer simulations based on Gold code sequences are used to verify the results.","PeriodicalId":136537,"journal":{"name":"2001 MILCOM Proceedings Communications for Network-Centric Operations: Creating the Information Force (Cat. No.01CH37277)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129632020","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
LPI, full-duplex voice communication using adaptive rate delta modulation LPI,使用自适应速率增量调制的全双工语音通信
B. Harvey
{"title":"LPI, full-duplex voice communication using adaptive rate delta modulation","authors":"B. Harvey","doi":"10.1109/MILCOM.2001.986035","DOIUrl":"https://doi.org/10.1109/MILCOM.2001.986035","url":null,"abstract":"This paper proposes a novel modulation concept for robust, low-probability-of-intercept (LPI), full-duplex, wireless, digital voice communication system. The adaptive rate delta modulation (AR-DM) uses a tri-level threshold to produce delta-modulated pulses only when the magnitude change exceeds a predetermined threshold. This technique significantly reduces the average pulse rate required and lowers the noise generated by delta modulation under zero input conditions. The receiver is reduced to a simple pulse detector and a counter to recreate the original signal. This system does not require headers, packets or other synchronizing schemes. The reduced pulse rate and input-dependent nature of the adaptive rate implementation allows multiple users to use the same channel concurrently for full-duplex voice communication. The pauses and amplitude variations of natural conversation provide gaps in pulse transmission through which other user pulses can be received with acceptable loss due to pulse collisions. Simultaneous reception from multiple transmitters gives a result resembling natural group conversation. AR-DM can be combined with spread-spectrum techniques and/or transmission in the millimeter wave (MMW) 60 GHz oxygen absorption band to provide reliable LPI communication for forward operating platoons or other small groups. A reliable and compact communication system can be deployed to each soldier. This paper presents the essentials of AR-DM and characterizes a voice communication system using spread spectrum and/or 60 GHz transmission band for LPI.","PeriodicalId":136537,"journal":{"name":"2001 MILCOM Proceedings Communications for Network-Centric Operations: Creating the Information Force (Cat. No.01CH37277)","volume":"186 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124751952","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
ROADMAP: a robust ACK-driven media access protocol for mobile ad hoc networks 路线图:用于移动自组织网络的健壮的ack驱动媒体访问协议
Dongkyun Kim, C. Toh, Yanghee Choi
{"title":"ROADMAP: a robust ACK-driven media access protocol for mobile ad hoc networks","authors":"Dongkyun Kim, C. Toh, Yanghee Choi","doi":"10.1109/MILCOM.2001.985986","DOIUrl":"https://doi.org/10.1109/MILCOM.2001.985986","url":null,"abstract":"A new and reliable MAC protocol is proposed to reduce the number of control handshake messages, such as RTS (Request-To-Send) and CTS (Clear-To-Send), incurred prior to data transmission in ad hoc wireless networks. Such a handshake is currently being used in the IEEE 802.11 DFWMAC (Distributed Foundation Wireless MAC) protocol. Our protocol is power efficient since fewer control messages are being used. By overhearing the ACK message sent by the upstream node, a node can gain advance knowledge that data would be arriving and hence need only to initiate a CTS later on. In addition to this, we introduce reliability into the protocol using an acknowledgment message to indicate that the data transmitted has been reliably received. Issues related to collision of control messages are also addressed in this paper. The communication performance of our protocol is evaluated via simulation and we also compare it with the IEEE 802.11 DFWMAC. Results show that our protocol outperforms DFWMAC with fewer control overheads incurred and smaller end-to-end delay.","PeriodicalId":136537,"journal":{"name":"2001 MILCOM Proceedings Communications for Network-Centric Operations: Creating the Information Force (Cat. No.01CH37277)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130615467","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
Performance of the 16QAM modem in the satellite communication environment 卫星通信环境下16QAM调制解调器的性能
H. Hwang, J.M. Charroux, L. Cooper, T.M. Nguyen, G. Goo
{"title":"Performance of the 16QAM modem in the satellite communication environment","authors":"H. Hwang, J.M. Charroux, L. Cooper, T.M. Nguyen, G. Goo","doi":"10.1109/MILCOM.2001.985916","DOIUrl":"https://doi.org/10.1109/MILCOM.2001.985916","url":null,"abstract":"This paper presents computer simulation results of the 16QAM modem in the satellite communication environment. An end-to-end communications system including a 16QAM modulator, klystron, satellite transponder, 16QAM demodulator, timing recovery loop, phase recovery loop, and channel filters are modeled by using SPW. Satellite transponder components modeled in SPW include up/down converters, channelizer and TWTA. Laboratory measured data are used to model the transmitter klystron and transponder TWTA. Simulation results show that the bit error rate (BER) performance is severely degraded by nonlinear amplifiers. Techniques to minimize the BER performance degradation using \"high power amplifier back-off\" and \"predistortion of the transmitter symbols\" are discussed.","PeriodicalId":136537,"journal":{"name":"2001 MILCOM Proceedings Communications for Network-Centric Operations: Creating the Information Force (Cat. No.01CH37277)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121507907","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
A new transmission/reception scheme for "blind" suppression of co-channel interference in FH-CDMA peer-to-peer mobile communications FH-CDMA点对点移动通信中“盲”抑制同信道干扰的一种新的收发方案
K.T. Wong
{"title":"A new transmission/reception scheme for \"blind\" suppression of co-channel interference in FH-CDMA peer-to-peer mobile communications","authors":"K.T. Wong","doi":"10.1109/MILCOM.2001.986047","DOIUrl":"https://doi.org/10.1109/MILCOM.2001.986047","url":null,"abstract":"A new frequency hopping scheme is herein proposed for blind space-time suppression of co-channel interference in FH-CDMA peer-to-peer wireless communications. The proposed blind adaptive \"smart antennas\" signal processing scheme maximizes the signal-to-interference-and-noise ratio (SINR) without prior knowledge of (1) the (possibly overlapping) hop sequences of the multi-user interferers, (2) the fading channel's (possibly spatially and temporally decorrelated) space-time impulse response, and (3) the mobile receiver antenna's nominal or actual gain/phase responses. The proposed scheme can reject \"spectral splatter\". This scheme may be implemented with only one receiving antenna, or as a space-time version for any number of antennas (as few as two), thereby exploiting any spatially decorrelated fading across the receiving antennas. All the above are made possible in the present scheme by substituting by a dedicated \"dump\" frequency for the desired signal's signature hop-sequence bins on a regular and rotating basis a priori known to the mobile receiver, thereby allowing adaptive estimation of the interference and noise affecting the desired signal.","PeriodicalId":136537,"journal":{"name":"2001 MILCOM Proceedings Communications for Network-Centric Operations: Creating the Information Force (Cat. No.01CH37277)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121672335","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
Application of foresight's technology to implement a waveform development environment 应用预见技术实现波形开发环境
B. Logan, D. Wilson
{"title":"Application of foresight's technology to implement a waveform development environment","authors":"B. Logan, D. Wilson","doi":"10.1109/MILCOM.2001.985793","DOIUrl":"https://doi.org/10.1109/MILCOM.2001.985793","url":null,"abstract":"To achieve interconnection of disparate waveforms and radio architectures, a mechanism must be available to efficiently develop and test waveforms, to prototype new software definable radio (SDR,) architectures, and to download waveforms in the field. At present, such SDR applications are developed using disparate traditional SW and HW tools that do not support a HW/SW co-design process for a total system synthesis. Foresight Systems, Inc. has developed several tools that address a methodology for this waveform development environment, how to model functions and architectures for the environment, mapping functions to architectures, simulation and performance calculations, and automatic code generation for systems in an integrated development environment (IDE). In the SDR field, waveform and control domain libraries must exist as well as architecture libraries with a rich variety of multi-processor models, operating systems (OS), protocols, and I/O drivers. Such libraries are necessary in order for the designer to perform HW/SW co-design and system trade-offs to construct various instantiations of communication waveforms dynamically downloadable to a software mobile radio. The application of Foresight Systems' technology to the development of a waveform development environment for software definable radios is currently under active discussion between Foresight Systems and commercial firms.","PeriodicalId":136537,"journal":{"name":"2001 MILCOM Proceedings Communications for Network-Centric Operations: Creating the Information Force (Cat. No.01CH37277)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124502324","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
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