منابع مشابه
Turbo Code Performance in Partial-band Jamming
The Johns Hopkins University/Applied Physics Laboratory Laurel, Maryland ABSTRACT Monte Carlo simulations model the eflects of partial-band jamming on turbo code performance over a slow frequency-hopped spread spectrum signal. Decoders using both hard and soft decision variables corrupted by Additive White Gaussian Noise (A WGN) are considered. Modulations include both Binary Phase Shzjl Keying...
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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 tone jamming and with data modulation 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...
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We study the properties of jammed packings of frictionless spheres over a wide range of volume fractions. There exists a crossover volume fraction which separates deeply jammed solids from marginally jammed solids. In deeply jammed solids, all the scalings presented in marginally jammed solids are replaced with remarkably different ones with potential independent exponents. Correspondingly, the...
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We investigate the existence of random close and random loose packing limits in twodimensional packings of monodisperse hard disks. A statistical mechanics approach— based on several approximations to predict the probability distribution of volumes— suggests the existence of the limiting densities of the jammed packings according to their coordination number and compactivity. This result has im...
متن کاملAdvanced differentially non-coherent code acquisition in jamming and data modulation
In this paper we consider differentially non-coherent code timing acquisition in Direct-Sequence Code-Division Multiple Access (DS-CDMA) communication system. Recently, an advanced method for differentially non-coherent acquisition, DCMUSIC, was proposed and noticed to combine the benefits of both conventional differentially non-coherent matched filter and traditional MUSIC estimator in a meani...
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ژورنال
عنوان ژورنال: M/C Journal
سال: 2006
ISSN: 1441-2616
DOI: 10.5204/mcj.2681