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In split spectrum macrocell-femtocell networks, certain portion of the available spectrum resources are dedicated to each tier in order to avoid interference problems among the tiers. In such a setting, effective partitioning of the spectrum resources carries critical importance for maximizing the total capacity and satisfying quality of service (QoS) requirements of the users within each tier. This...
In this paper, due to optimum finite time and frequency support feature of discrete prolate spheroidal wave functions (DPSWF), we propose a Slepian (originally known as DPSWF) based channel interpolator for LTE uplink systems in high speed environments. The proposed channel interpolator is applied to recover the time variation of channel between training symbols within two consecutive slots in a single...
Open access is one of the access options for femtocell networks, where the mobile stations (MSs) are allowed to make hand-off to the femtocell base stations (fBSs) in their vicinity. In this paper, several performance trade-offs that are related to the deployment of open access femtocell networks are presented through computer simulations. In particular, first, impact of a capacity-based cell selection...
Unpredictable characteristics of power line communication (PLC) channels seriously affect the performance of the communication systems. Among these unpredictable characteristics, noise is considered to be the main source of errors in data transmission in PLC systems. Unlike conventional communication systems in which noise is usually modeled as additive white Gaussian noise (AWGN), its definition...
Twenty-seven fractures in 22 children (14 female, 8 male; average age: 10.5) who suffered gunshot wounds were retrospectively evaluated. Fourteen of the fractures were caused by high-velocity weapons, four by low-velocity weapons, and nine by shotguns. One of the fractures was undisplaced, two were displaced, 10 were comminuted, seven were comminuted and displaced, and seven had bony defects. Accompanying...
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