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Military Communications Conference, 1995. MILCOM '95, Conference Record, IEEE

5-8 Nov. 1995

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  • Conference Author Index

    Publication Year: 1995
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  • Time delay spread measurements at two frequencies in a small city

    Publication Year: 1995, Page(s):942 - 946 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    Time delay spread and signal level measurements were made in the streets of a small city at 850 MHz and 1.9 GHz. The results are compared to earlier measurements made in the same city at 850 MHz. The root mean square (rms) time delay spread was statistically the same at the two frequencies. The maximum rms time delay spread observed was 920 nanoseconds (ns). However, this dropped to under 476 ns f... View full abstract»

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  • Performance of reverse link CDMA in a multi-cell environment with moving cells

    Publication Year: 1995, Page(s):937 - 941 vol.3
    Cited by:  Papers (4)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    We present the bit error performance and capacity of the reverse link of a DS-CDMA cellular system, taking into account the effect of power-controlled interfering users from other cells. A convolutionally encoded, BPSK modulated, waveform is considered. The channel is assumed to undergo flat Rayleigh fading, which is typical of narrowband CDMA systems. All the mobile users are power-controlled by ... View full abstract»

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  • An efficient group addressing scheme for DQDB

    Publication Year: 1995, Page(s):1150 - 1154 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (516 KB)

    Group addressing distributed queue dual bus (GA DQDB) is a new scheme for improving throughput of services on existing DQDB network. The GA DQDB is an extension and generalization of the basic distributed queue protocol defined in the IEEE 802.6 DQDB MAN standard and supports slot reuse. The grouping principle allows for dividing the nodes in network into multiple groups, each with distinct group-... View full abstract»

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  • Rapid fading effects on airborne satellite communication receivers employing Granlund pre-detection diversity combiners

    Publication Year: 1995, Page(s):1013 - 1020 vol.3
    Cited by:  Papers (2)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (600 KB)

    A two ray fading model is used to illustrate the effects of over water flight on satellite communications when a Granlund (1956) pre-detection diversity combiner is used to extend the receive antenna coverage. An airplane with multiple antennas covering non-overlapping arrival angles is investigated. A linearized model developed for the combiner is applied to the task of estimating phase tracking ... View full abstract»

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  • Proposed rating factor for operational C4I assessment

    Publication Year: 1995, Page(s):1115 - 1119 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (452 KB)

    The critical importance of command, control, communications, computer and intelligence (C4I) dominance of the battle space and possible effects of command and control warfare, and information based warfare (IW) creates the need for a concept that aides senior decision makers, battle staff and planners in quickly assessing the C4I sufficiency of force deployment options. Such a rating system must p... View full abstract»

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  • Channel estimation and blind equalization using minimum state per-survivor processing

    Publication Year: 1995, Page(s):993 - 997 vol.3
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB)

    Per-survivor processing (PSP) is an adaptive form of sequence estimation which jointly estimates the data and the unknown parameters of a signal affected by memory such as a communications waveform corrupted by intersymbol interference (ISI). PSP maintains a corresponding channel estimate for each data sequence it retains and the Viterbi algorithm is used to select candidate sequences through the ... View full abstract»

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  • Multiamplitude and multidimensional signalling over fading multipath channels

    Publication Year: 1995, Page(s):1031 - 1035 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    This paper examines the performance of a multi amplitude and multidimensional schemes for high speed digital radio systems over bandlimited channels in the presence of additive white Gaussian noise (AWGN), intersymbol interference (ISI) and multipath fading. The penalty in SNR is reduced by means of efficient modulation/coding and demodulation/decoding techniques. In particular, we demonstrated a ... View full abstract»

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  • Suppression of strong narrowband interference using an eigen-structure-based algorithm

    Publication Year: 1995, Page(s):1205 - 1208 vol.3
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (204 KB)

    This paper describes an eigen-structure-based (ESB) filtering algorithm for suppressing a strong tone interference source in direct sequence spread spectrum (DSSS) communication systems. The effectiveness of the proposed algorithm is illustrated by comparing its bit error rate (BER) performance with a LSM-based algorithm through computer simulated experiments View full abstract»

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  • Orthogonal CDMA for wireless PBX and cordless telephony applications

    Publication Year: 1995
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (32 KB)

    Summary form only given. Presents a patented orthogonal CDMA waveform for wireless PBX and cordless telephony applications in the unlicensed PCS and ISM bands. This waveform offers significant capacity advantages over TDMA and conventional CDMA in a multi-cell environment. Because navigation capability is built into the communication waveform, it can also provide user location to authorized public... View full abstract»

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  • Photonics at Sandia National Laboratories: applying device technology to communication systems

    Publication Year: 1995, Page(s):1274 - 1278 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (524 KB)

    Photonic device activities at Sandia National Laboratories are founded on an extensive materials research program that has expanded to include device development, and an applications focus that heavily emphasizes communications and interconnects. The resulting program spans a full range of photonics research, development, and applications projects, from materials synthesis and device fabrication t... View full abstract»

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  • Analysis of least-time and minimum-hop routing for clustered temporal networks

    Publication Year: 1995, Page(s):1144 - 1149 vol.3
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (492 KB)

    Networks of low-altitude multiple satellites (LAMS) have been envisioned to provide such diverse tasks as global positioning, paging, weather tracking, surveillance, and environmental observation and disaster assessment. One theoretical model for such dynamically reconfiguring networks, allowing the investigation of packet routing, is the clustered temporal network (CTN). The store-and-forward rou... View full abstract»

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  • End-to-end security for commercial PCS networks

    Publication Year: 1995, Page(s):1253 - 1257 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    The emergence of second and third generation commercial mobile telecommunications networks poses numerous technical challenges to maintain connectivity of existing COMSEC services, in particular STU-III (U.S. Government third generation secure terminal unit) services, for cellular and PCS users. This paper highlights the progress being made in the North American wireless standards forums to define... View full abstract»

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  • DMS service management

    Publication Year: 1995, Page(s):967 - 971 vol.3
    Cited by:  Patents (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    The Department of Defense's transition from AUTODIN store and forward messaging and baseline individual electronic mail (email) systems to the Defense Message System (DMS) will involve fielding a messaging infrastructure to support a million plus users. The DMS service management capability needs to be able to handle operational issues such as end-to-end performance, message monitoring and trackin... View full abstract»

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  • Higher-order differential modulation techniques

    Publication Year: 1995, Page(s):1008 - 1012 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (412 KB)

    We consider differential phase modulation techniques to be used over channels in which frequency uncertainties are the major impairment to performance rather than additive white Gaussian noise (AWGN). For example, in low Earth orbiting (LEO) satellite communication systems, both Doppler and Doppler rate terms contribute to a phase process difference between the received signal and the receiver's l... View full abstract»

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  • An overview on interoperability of M&S with C4I systems

    Publication Year: 1995, Page(s):1108 - 1114 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (776 KB)

    The Persian Gulf conflict has led top level military decision makers to conclude that increased joint C4I interoperability is necessary to improve the decision making process, to process the increased amounts of information, and to synchronize combat capabilities. This paper discusses the reasons for making modeling and simulation (M&S) interoperable with C4I systems. It discusses the various ... View full abstract»

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  • Polynomial matrix whitening and application to the multichannel blind deconvolution problem

    Publication Year: 1995, Page(s):988 - 992 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (340 KB)

    A method for whitening a polynomial matrix is described, including the calculation of the eigenvalue polynomials and eigenvector polynomials of an FIR polynomial matrix. The multichannel blind deconvolution problem is briefly described and FIR polynomial matrix whitening is applied to the problem. Benefits of the whitening technique are demonstrated through simulation. Data prewhitening or the use... View full abstract»

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  • Deployment of the Defense Message System in the tactical environment

    Publication Year: 1995, Page(s):977 - 981 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    Command, control, communications, computers, and intelligence for the warrior (C4IFTW) architectures are being designed to provide an information infrastructure that is transparent to the warriors, but accessible by them anywhere they are deployed. This paper discusses the planning, engineering and implementation activities for deploying the Defense Message System (DMS) into the battlespace for th... View full abstract»

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  • Analysis of a simple protocol for short message data service in an integrated voice/data CDMA system

    Publication Year: 1995, Page(s):1160 - 1164 vol.3
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    In a mobile cellular CDMA system, the transmissions of the users are power controlled such that their received energies at the base station are approximately equal. This is done with a desire to maximize the capacity of such systems, and further, stability is maintained by limiting the arrival rates of users into the system. This paper analyzes a simple protocol for transmission of short data mess... View full abstract»

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  • Differentially amplitude and phase encoded QAM on Rayleigh fading channels

    Publication Year: 1995, Page(s):1026 - 1030 vol.3
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (484 KB)

    Quadrature amplitude modulation (QAM) is an effective technique to achieve a high bit-rate transmission without increasing the transmission bandwidth. Due to the limitation on available spectrum, research in digital mobile data communications have considered employing QAM as the fundamental modulation format. This paper evaluates the bit error probability (BEP) of differentially amplitude encoded ... View full abstract»

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  • Linking C4I and modeling and simulation systems

    Publication Year: 1995, Page(s):1126 - 1128 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    Traditionally, command, control, communications, computer and intelligence (C4I) systems have existed in environments separate from simulation systems. Simulation systems are in wide use throughout the Department of Defense (DoD). Most existing simulations are distinguished by a focus on a particular functional area, without regard for the utility of interneting the simulation with other systems. ... View full abstract»

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  • An active squelch technique for HF communication systems

    Publication Year: 1995, Page(s):1071 - 1075 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    A reliable squelch feature has long been a difficult goal in the low signal to noise ratio and high interference environments typical of HF links. Many passive techniques have been attempted and implemented. These passive techniques range from simple power measurement to elaborate neural network based speech detection systems. All of these approaches suffer from a decrease in reliability as channe... View full abstract»

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  • Advanced adaptive null steering concepts for GPS

    Publication Year: 1995, Page(s):1214 - 1218 vol.3
    Cited by:  Papers (28)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    The problem of protecting the GPS signal from interference is addressed. A number of null steering techniques for use in conjunction with antenna arrays are compared and contrasted in terms of efficient use of available degrees of freedom and computational complexity. The techniques investigated range from the simple well known power minimization approach to a subspace constrained power minimizati... View full abstract»

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  • Haiti: projecting tactical network and systems management

    Publication Year: 1995, Page(s):906 - 910 vol.3
    Cited by:  Patents (29)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (476 KB)

    The nature of recent military operations has been one of maximizing readiness (e.g., quick deployments) while minimizing in-theater personnel and equipment. Projecting technical expertise from the Continental United States (CONUS) to the deployed area of operations is critical to ensuring the success of the warfighter. Operation UPHOLD DEMOCRACY is the first of many opportunities to project tactic... View full abstract»

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  • Synchronization and detection of spread spectrum signals in multipath channels using antenna arrays

    Publication Year: 1995, Page(s):1170 - 1174 vol.3
    Cited by:  Papers (15)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    This paper deals with the synchronization of spread spectrum signals in a CDMA communication system, while carrier lock is assumed to have been achieved. For satisfactory performance, the error in code timing must be less than a chip-length because of the sharp autocorrelation function that most codes possess. This task is further complicated because of the typical multipath channels that users in... View full abstract»

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