Military Communications Conference, 1996. MILCOM '96, Conference Proceedings, IEEE

24-24 Oct. 1996

Go

Filter Results

Displaying Results 1 - 25 of 80
  • IEEE Military Communications Conference - Milcom 96 [front matter]

    Publication Year: 1996, Page(s):i - xxiv
    Request permission for commercial reuse | |PDF file iconPDF (843 KB)
    Freely Available from IEEE
  • A near optimum diversity combining method adapted to slow frequency hopping DPSK transmission

    Publication Year: 1996, Page(s):984 - 987 vol.3
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (370 KB)

    Frequency hopping (FH) is used in communication systems to mitigate interference such as jamming. For low data rate, fast FH and MFSK are often used in combination with diversity, which consists in transmitting every symbol on several hops. It brings additional protection. Several robust diversity combining methods have been developed previously for fast FH. Much attention has been previously focu... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Conference Author Index

    Publication Year: 1996, Page(s):1084 - 1086
    Request permission for commercial reuse | |PDF file iconPDF (143 KB)
    Freely Available from IEEE
  • Beamforming design with adaptive variable redundancy arrays

    Publication Year: 1996, Page(s):863 - 867 vol.3
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (476 KB)

    This paper proposes a beamforming design method for interference cancellation using a special thinned array structure, termed variable redundancy array (VRA). VRA is analyzed with adaptive beamforming design techniques over a set of likely interference scenarios. The design criterion is determined by a compromise between complexity and performance levels, taking into account both the array geometr... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Diversity reception in alpha-stable impulsive interference

    Publication Year: 1996, Page(s):828 - 832 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (404 KB)

    We evaluate the performance of asymptotically optimum multichannel structures for incoherent detection of amplitude-fluctuating bandpass signals in impulsive interference modeled as a bivariate, isotropic, symmetric, alpha-stable process. We derive a test statistic that takes into account the infinite variance in the noise model and approaches the performance of the strictly optimum algorithm for ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A transmission convergence sublayer for wireless ATM with code division multiple access (CDMA)

    Publication Year: 1996, Page(s):760 - 768 vol.3
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (728 KB)

    Asynchronous transfer mode (ATM) is rapidly emerging as a key transport mechanism of future multimedia networks, and wireless networks are being widely deployed to provide personal communication services. Thus future ATM networks are expected to comprise wireline as well as wireless subnetworks and the interoperability of wireless and wireline ATM networks becomes increasingly important. To facili... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Efficient lattice filtering algorithms and architectures

    Publication Year: 1996, Page(s):859 - 862 vol.3
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (312 KB)

    Simplified Gaussian driven nonlinear lattice filters are derived. Like the linear whitener, the Gaussian nonlinear whitener requires O(N) computations and still achieves a completely orthogonal basis. Simplification is afforded by exploiting the zero odd moment property of Gaussian signals and the knowledge of the eigenvalue spread contributing inputs View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Asymptotic throughput of the FED-STD-1052 data link protocol

    Publication Year: 1996, Page(s):700 - 705 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (484 KB)

    There has been a rapid evolution of data communication technologies specially adapted to the challenges of HF skywave channels. The 1980s saw the development of advanced HF modems that achieve significant processing gains through adaptive equalization and advanced coding. The standardized HF data link link protocol of FED-STD-1052 and MIL-STD-187-721C effectively uses the capabilities of these new... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Performance measures for adaptive antenna systems

    Publication Year: 1996, Page(s):1050 - 1054 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (404 KB)

    As the desire for jamming-resistant satellite communication grows, adaptive antennas will soon enter service on satellite platforms. These antennas cancel received interference to a low level while preserving as much user coverage as possible. The specification of adaptive antenna performance has considerable subtlety. Such antennas need measures of quiescent and steady-state adapted performance, ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A method for detecting a fine frequency deviation

    Publication Year: 1996, Page(s):824 - 827 vol.3
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (376 KB)

    The paper considers the effect of a fine frequency deviation generated in a transmission channel on the performance of an adaptive equalizer. We describe a channel model with a frequency deviation and investigate how the equalizer is adapted to the channel. The test results show that even a small amount of frequency deviations can severely deteriorate the adaptation performance. The paper also pro... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Diversity combining for M-ary fast frequency hopping multiple-access Rayleigh fading channel

    Publication Year: 1996, Page(s):893 - 897 vol.3
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (416 KB)

    This paper investigates four diversity combining techniques for a fast frequency hopped spread-spectrum multiple-access (FFH/SSMA) communications system. A single cell system is considered with multiple-access interference, additive white Gaussian noise and Rayleigh fading. The modulation is M-ary frequency shift keying with non-coherent detection at the receiver. The system performance is evaluat... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Fast converging methods for multichannel blind equalization or separation of multipath mixtures

    Publication Year: 1996, Page(s):854 - 858 vol.3
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (356 KB)

    Algorithms for adapting FIR filters can also be applied to adaptation of FIR separation matrices (with multipath) for source separation. Fast converging algorithms robust to eigenvalue disparity are of interest, such as the exact least squares methods from the area of adaptive filters. Time domain adaptive multichannel blind recursive least squares (MBRLS) is presented. Three frequency domain algo... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Antenna downtilt performance in urban environments

    Publication Year: 1996, Page(s):739 - 744 vol.3
    Cited by:  Papers (3)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (688 KB)

    This paper discusses antenna downtilt concepts and performance in an actual operating cellular system, the relationship between antenna height, downtilt angle, and coverage radius is also discussed. Theoretical calculation and actual operating data collected from the cellular system are compared. We draw the two following conclusions. In modern urban propagation environments, the coverage area con... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Useful new results on the time to lose lock for a simple Markov tracking scheme

    Publication Year: 1996, Page(s):806 - 810 vol.3
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (412 KB)

    We study the time to lose lock of a simple and popular Markov tracking scheme wherein a signal or status indicator is monitored every T seconds. Loss of tracking is declared if the signal is not detected for s consecutive time units; otherwise, tracking is maintained. To date, there exists a closed form expression for the mean time to lose lock E[TLL] and also an expression involving a matrix inve... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The case for multiply-detected macrodiversity scheme in mobile systems

    Publication Year: 1996, Page(s):928 - 932 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (376 KB)

    The multiply-detected macrodiversity (MDM) is based on post-detection combining; i.e., it is a macrodiversity scheme with a number of received signals being detected and a decision algorithm being employed to maximize the probability of correct decision. We compare the performance of the MDM scheme with the traditional S/I-diversity and show the achievable improvement. As a rule of thumb, improvem... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Error correction in high frequency automatic link establishment radios with and without link protection

    Publication Year: 1996, Page(s):696 - 699 vol.3
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (220 KB)

    Error correcting techniques used by high frequency automatic link establishment (HF ALE) radios, including those with link protection, transform a basic 24-bit ALE word into 147 bits to be transmitted and received. This paper examines the effect random errors in the 147 received bits have on the received 24-bit ALE word View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Interference suppression using cosine-modulated filter banks

    Publication Year: 1996, Page(s):1045 - 1049 vol.3
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (456 KB)

    In order to mitigate narrow-band interference in spread spectrum communications systems, novel communications receivers incorporating transform domain filtering techniques are designed. In this paper, lapped transforms are used to transform the received data signal to the transform domain wherein adaptive excision is performed. Transform domain detection algorithms, which yield bit decisions based... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A nine-tile algorithm for LPI signal detection using QMF filter bank trees

    Publication Year: 1996, Page(s):974 - 978 vol.3
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (304 KB)

    This paper describes a novel spread spectrum intercept receiver which uses orthogonal wavelet techniques and a quadrature mirror filter (QMF) bank tree to decompose a waveform into components representing the energy in rectangular “tiles” in the time-frequency plane. Specifically, a nine-tile algorithm is presented and discussed. By simultaneously examining multiple layers of the tree,... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Loss of phase coherence in Granlund pre-detection diversity combiners

    Publication Year: 1996, Page(s):791 - 795 vol.3
    Cited by:  Papers (2)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (464 KB)

    The Granlund (1956) pre-detection diversity combiner is an effective implementation of a maximal ratio pre-detection diversity combiner. The Granlund combiner phase corrects and weights an arbitrary number of input signals before adding them at a common summing junction. The Granlund technique uses a tone developed by cross correlation of an input signal with the combined output as a local oscilla... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • ATM multimedia switching

    Publication Year: 1996, Page(s):774 - 778 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (920 KB)

    Shared situation awareness requirements indicate the balance of battlefield information will shift from a predominately voice infrastructure to a truly multimedia environment. As long as the battlefield communication systems remain mobile assets, bandwidth will always be a limited commodity, regardless of improvements in the radio transmission capabilities. As such, efficiency in managing the band... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Frequency offset compensator for land mobile zero-crossing digital FM receiver

    Publication Year: 1996, Page(s):745 - 749 vol.3
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (448 KB)

    A base-band demodulator called zero-intermediate frequency zero-crossing demodulator (ZIFZCD) was developed. The ZIFZCD is mostly implemented in digital hardware which offers low power consumption, small size and ease of manufacture. The frequency offset effect on the performance of the ZIFZCD has been studied and a significant bit error rate (BER) degradation has been observed. Two frequency offs... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • FDMA system performance with synchronization errors

    Publication Year: 1996, Page(s):811 - 818 vol.3
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (568 KB)

    The effect of time and frequency synchronization errors on the performance of an FDMA communication system using symmetric differential phase shift keying (SDPSK) is considered. Power and bandwidth efficiency of the system versus channel frequency spacing and adjacent channel power imbalance are investigated for the ordinary SDPSK, guard time demodulated SDPSK, and square root raised-cosine pulse ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Fast self-healing for node failures in ATM networks

    Publication Year: 1996, Page(s):750 - 754 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (480 KB)

    Network restoration becomes an essential function for a high speed network since service disruption due to network failures can cause a huge tangible and intangible loss for customers and service providers. We propose a VP-based distributed self-healing to rapidly restore the disrupted VPs from node failures. The developed scheme can provide a priority restoration based on the survivability requir... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Fading phenomena in the tactical radio environment

    Publication Year: 1996, Page(s):728 - 732 vol.3
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (648 KB)

    Most of the recent propagation research that has been sponsored in the 1 to 3 GHz frequency spectrum has centered on propagation phenomena in urban settings to support military operations in urban terrain (MOUT) and the development of personal communication systems. There is a dearth of empirical propagation data in this region of the frequency spectrum that is applicable to tactical military oper... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The simulation of adaptive antennas

    Publication Year: 1996, Page(s):887 - 892 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (556 KB)

    This paper describes how a simulation of an adaptive satellite antenna may be designed in order to combine modeling fidelity and flexibility, using experience gained in constructing just such a simulation. It discusses the broadband modeling of user and jammer signals, and their propagation through the hardware components, as well as the modeling of the system's adaptive response to them. The moni... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.