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MILCOM 2000 Proceedings. 21st Century Military Communications. Architectures and Technologies for Information Superiority (Cat. No.00CH37155)

22-25 Oct. 2000

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  • MILCOM 2000 - 21st Century Military Communications Conference Proceedings [front matter]

    Publication Year: 2000, Page(s):i - xxvii
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    Freely Available from IEEE
  • Internetworking in the MUOS CAI and the advanced narrowband system

    Publication Year: 2000, Page(s):792 - 796
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    Next generation mobile tactical narrowband systems, embodied in the Mobile User Objective System (MUOS), must plan internetworking operations expected to serve 12 years starting in 2007. MUOS may deploy its own satellite Common Air Intetface (CAI) waveform to serve low rate, high mobility handhelds as well as larger terminals with higher capacity than predecessor UFO. The CAI media access control ... View full abstract»

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  • Interference issues associated with ITU coordination of the advanced narrowband system frequencies

    Publication Year: 2000, Page(s):797 - 800
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    First Page of the Article
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  • Author index

    Publication Year: 2000, Page(s):0_1 - 0_5
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    Freely Available from IEEE
  • Differentially coherent code acquisition in wideband jamming

    Publication Year: 2000, Page(s):1129 - 1133 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (413 KB)

    This paper considers the use of differentially coherent (DC) matched filter (MF) code acquisition in a direct-sequence (DS) spread-spectrum system. Simulation results in wideband jamming are presented. The performance of structure is compared to conventional noncoherent (NC) MF acquisition. The performance measure is the mean acquisition time, TMA. The results indicate that the differen... View full abstract»

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  • Data recovery in differentially encoded quadrature phase shift keying

    Publication Year: 2000, Page(s):718 - 721 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (236 KB)

    Information in a PSK modulation format is contained in the phase. For Gray-coded DEQPSK, this information is contained in the change in phase. With advances in DSP technology, fundamental trigonometric signal processing functions which have, in the past, been unavailable, now provide a mechanism for recovering the phase differential directly from the phase plane. This paper presents a new algorith... View full abstract»

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  • 2-dimensional signals restoration using autoregressive models

    Publication Year: 2000, Page(s):715 - 717 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (212 KB)

    This paper presents the results of experiments concerning restoration of blurred 2-dimensional images. An iterative method of interfering signal elimination is proposed. The processing is performed in the complex signal domain using the block estimation method of autoregressive (AR) models, based on the least squares (LS) method. The paper presents also simulation results versus different environm... View full abstract»

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  • Adaptive space-time signal processing and coding

    Publication Year: 2000, Page(s):710 - 714 vol.2
    Cited by:  Patents (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    This paper considers the capacities available in multi-antenna or MIMO systems through the use of techniques such as space-time coding. In particular we compare the conventional space-time coding systems so far developed which do not make use of knowledge of the channel at the transmitter, with the optimum adaptive system which adapts the transmission to the channel characteristics. We show by a s... View full abstract»

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  • Global Broadcast Service (GBS) end-to-end services: protocols and encapsulation

    Publication Year: 2000, Page(s):704 - 709 vol.2
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (452 KB)

    The Global Broadcast Service (GBS) Phase II system is designed to provide eight different end-to-end data services to its end users. These services are based on the encapsulation of assorted source data types into various protocol data formats prior to being multiplexed into one RF broadcast waveform. This paper describes the encapsulation/de-encapsulation process for each GBS service as data for ... View full abstract»

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  • LinkwayTM for 21st century military communications

    Publication Year: 2000, Page(s):619 - 623 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (452 KB)

    To achieve information superiority in the 21st century, military communications will increasingly depend on satellite systems. COMSAT Laboratories has developed a broadband VSAT networking product called LINKWAYTM that, today, provides seamless extension of terrestrial networks using industry-standard protocols. This paper describes LINKWAY's unique features, including its hubless archi... View full abstract»

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  • Tradeoffs of source coding, channel coding and spreading in CDMA systems

    Publication Year: 2000, Page(s):846 - 850 vol.2
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    We consider a CDMA system consisting of an image source coder, a convolutional channel coder, an interleaver, and a direct sequence spreading module. With different allocations of bandwidth to source coding, channel coding and spreading, the system is analyzed over a frequency selective Rayleigh fading channel. The performance of the system is evaluated using the cumulative distribution function o... View full abstract»

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  • GBS IP multicast tunneling

    Publication Year: 2000, Page(s):699 - 703 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    Internet protocol (IP) multicast over the DoD's Global Broadcast Service (GBS) provides a one-way communications path to the warfighter as part of an interactive communications system. GBS provides the capability to deliver information products of varying size, timeliness requirements, and security levels. The products share satellite resources based on CINC/JTF commanders priorities, operational ... View full abstract»

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  • Decoder-assisted frame synchronization of convolutionally encoded packet transmission

    Publication Year: 2000, Page(s):1114 - 1118 vol.2
    Cited by:  Papers (1)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB)

    This paper proposes an improved frame synchronization methodology for convolutionally encoded data packets that operates by concatenating synchronizers. A soft-decision synchronizer generates an ordered list of likely packet delays and is followed by a hard-decision synchronizer. Rather than employing a traditional header, synchronization bits are inserted in a mid-amble of the information packet.... View full abstract»

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  • Feature extraction of intra-pulse modulated signals using time-frequency analysis

    Publication Year: 2000, Page(s):737 - 741 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    Time-frequency/wavelet decompositions and pattern recognition schemes are used to extract the parameters of linear and hyperbolic chirps. The study first compares the robustness to additive noise distortions of eleven different transformations applied in connection with the Radon transform to estimate linear chirp parameters. Second, it proposes an iterative scheme to estimate hyperbolic chirp par... View full abstract»

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  • Low complexity array response vector estimation for smart antenna systems

    Publication Year: 2000, Page(s):841 - 845 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    In this paper, we propose a low complexity blind estimation algorithm for array response vector estimation in smart antenna systems. We analyze the previous algorithm to figure out the inherent estimation errors in it. Based on the analysis, we propose an unbiased estimation algorithm which yields more accurate estimates with tolerable increment of computational complexity. Compared with the singu... View full abstract»

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  • Enhancing operating system resistance to information warfare

    Publication Year: 2000, Page(s):1037 - 1041 vol.2
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    A novel approach to defensive information warfare (DIW) is suggested that exploits the availability of low-cost symmetric multiprocessing systems and readily available COTS open source software. Pentium-based systems are now available at consumer prices in which dual-processor functionality can be acquired for a few hundred dollars. Coupled with COTS Linux OS software, such systems can be extended... View full abstract»

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  • Applicability of demand assigned multiple access (DAMA) waveforms for the integrated broadcast service (IBS)

    Publication Year: 2000, Page(s):1192 - 1198 vol.2
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (696 KB)

    The Chairman Joint Chiefs of Staff Instruction CJCSI 6251.01, “Ultrahigh Frequency Satellite Communications Demand Assigned Multiple Access Requirements”, 31 July 1996, mandates that “All users of non-processed UHF MILSATCOM are required to have DAMA terminals that are interoperable in accordance with MIL-STD-188-181, MIL-STD-188-182, and MIL-STD-188-183”. The Integrated Br... View full abstract»

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  • Likelihood ratio tests for modulation classification

    Publication Year: 2000, Page(s):670 - 674 vol.2
    Cited by:  Papers (81)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB)

    We discuss modulation classification (MC) algorithms that are based on the decision theoretic approach, where the MC problem is viewed as a multiple-hypothesis testing problem. In particular, a random-phase AWGN channel is considered and possible solutions to this hypothesis testing problem are reviewed. We present two novel algorithms and we compare their performance with existing ones for a vari... View full abstract»

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  • Quality of service and new architectures for future telecommunications networks

    Publication Year: 2000, Page(s):695 - 698 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    In data networks, the most used protocol is the IP protocol and it is essentially the Web that has allowed the development of Internet and IP protocol. IP protocol provides flexibility, but today there is no tested mechanisms enabling to give a real quality of service (QoS). QoS is necessary for new applications such as voice over IP (VoIP) to enable transmission of voice through packet network. N... View full abstract»

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  • BPSK and QPSK modulation classification with unknown signal level

    Publication Year: 2000, Page(s):976 - 980 vol.2
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    Modulation classification is an intermediate step between signal detection and data demodulation. It is attempted for a variety of reasons including reconnaissance, surveillance and other intelligence gathering activities. In practice, the level of a received signal is not known and not constant because of many different reasons, such as fading. In such a case, the classifier needs to estimate the... View full abstract»

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  • Synchronization improvements in software defined radios from the use of diversity

    Publication Year: 2000, Page(s):1109 - 1113 vol.2
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB)

    This paper discusses the use of spatial diversity to enhance symbol synchronization. The software defined radio (SDR) is used as a means of providing a realizable implementation for our method. We use offset-QPSK (O-QPSK) modulation with pre-detection combining in a channel environment that includes additive white Gaussian noise (AWGN) and independent frequency nonselective slow Rayleigh-fading. I... View full abstract»

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  • A fast automatic modulation recognition algorithm and its implementation in a spectrum monitoring application

    Publication Year: 2000, Page(s):732 - 736 vol.2
    Cited by:  Papers (19)  |  Patents (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    An algorithm based on an efficient decision-tree approach for performing real-time automatic modulation recognition is presented. The algorithm is computationally efficient and can discriminate between various digital and analog signal modulation, delivering reliable decisions using very short observation times. Communications formats, such as AMPS, GSM and US digital cellular, can also be recogni... View full abstract»

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  • Propagation effects on the wideband gapfiller communication link

    Publication Year: 2000, Page(s):634 - 639 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    This paper investigates the propagation effects on the wideband gapfiller satellite communication link. The atmospheric loss and rain attenuation are estimated using the current empirical atmospheric gaseous and rain models. In addition, the contributions on system noise temperature due to rain and gaseous attenuation are also estimated. The attenuation results are presented for a range of link av... View full abstract»

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  • Satellite loading tools using spreadsheets

    Publication Year: 2000, Page(s):1209 - 1213 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (316 KB)

    A methodology is presented whereby one can easily develop a spreadsheet on a PC to perform a loading on a transponded satellite. The mathematics are given in simple terms and the techniques used in a spreadsheet are presented. One can easily develop a loading tool to cover the following cases: linear or hard limited transponder operation, jamming (either AWGN or constant envelope), calculation of ... View full abstract»

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  • A new direction finding scheme for DS/CDMA systems with array antenna

    Publication Year: 2000, Page(s):836 - 840 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    This paper proposes a new scheme for finding direction of arrival (DOA) and channel impulse response of each user's signal for third generation direct sequence code division multiple access (DS/CDMA) systems. For the third generation DS/CDMA systems, the pilot signal is simultaneously transmitted with the data signal through the pilot channel in the uplink. The proposed DOA and channel impulse res... View full abstract»

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