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An Efficient Performance of Mimo - Ofdm Based Cognitieve Radio System for Arr...
An Efficient Performance of Mimo - Ofdm Based Cognitieve Radio System for Arr...IOSR Journals
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The document presents a new pilot design method for Multi-Input Multi-Output (MIMO) based Cognitive Radio (CR) systems utilizing Orthogonal Frequency Division Multiplexing (OFDM) to enhance wireless transmission reliability and efficiency. The proposed system addresses challenges such as pilot tone selection for channel estimation in cognitive radio environments, achieving significant performance improvements over traditional approaches through optimization techniques. Simulation results demonstrate that the new method optimally utilizes activated subcarriers to maximize system capacity and minimize bit error rates.CR- Submanifoldsof a Nearly Hyperbolic Cosymplectic Manifold
CR- Submanifoldsof a Nearly Hyperbolic Cosymplectic ManifoldIOSR Journals
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This document discusses properties of CR-submanifolds of a nearly hyperbolic cosymplectic manifold. It begins with definitions of nearly hyperbolic cosymplectic manifolds and CR-submanifolds. The paper then obtains some results about the horizontal and vertical distributions on CR-submanifolds, including that the horizontal distribution is invariant by the structure tensor , while the vertical distribution is anti-invariant by . Lemmas are proved relating the covariant derivatives of on the horizontal and vertical distributions to terms involving the second fundamental form and normal connection.B017130508
B017130508IOSR Journals
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1) The document discusses providing security against distributed denial of service (DDOS) attacks in mobile ad hoc networks. It focuses on intrusion detection systems and detecting black hole and wormhole attacks.
2) Black hole attacks involve malicious nodes pretending to have valid routes to destinations in order to intercept packets. Wormhole attacks involve tunneling packets between two points in the network to attract traffic.
3) The document proposes using intrusion detection systems that use both signature-based and anomaly-based detection to identify these types of attacks without prior knowledge of signatures. It aims to provide a solution for detecting and mitigating DDOS attacks in ad hoc networks.The Evaluation of the Seismic Vulnerability of Reinforced Concrete Building i...
The Evaluation of the Seismic Vulnerability of Reinforced Concrete Building i...IOSR Journals
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The document evaluates the seismic vulnerability of reinforced concrete buildings in Morocco by analyzing maximum displacements and stability factors across three seismic zones defined by Moroccan regulations (RPS 2000). It concludes that buildings in lower seismic zones exhibit less displacement and risk, suggesting that construction design should be optimized according to the seismic characteristics of different areas. The study aims to integrate economic and technical considerations into the seismic design process to enhance safety and reduce construction costs in high-risk zones.Flyer listoErick Pinargote
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La Master Edition de Legend of Zelda incluye una estatua de la Master Sword, el juego de Legend of Zelda, un estuche Sheikah para Nintendo Switch, un soundtrack con 24 canciones, una moneda conmemorativa y una caja especial, adem叩s de un 10% de descuento en la compra.Flyer DonkeyErick Pinargote
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La Master Edition de Legend of Zelda incluye una estatua de la Master Sword, el juego de Legend of Zelda, un estuche Sheikah para Nintendo Switch, un soundtrack con 24 canciones, una moneda conmemorativa y una caja especial, adem叩s de un 10% de descuento en la compra.More Related Content
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Flyer listoErick Pinargote
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La Master Edition de Legend of Zelda incluye una estatua de la Master Sword, el juego de Legend of Zelda, un estuche Sheikah para Nintendo Switch, un soundtrack con 24 canciones, una moneda conmemorativa y una caja especial, adem叩s de un 10% de descuento en la compra.Flyer DonkeyErick Pinargote
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La Master Edition de Legend of Zelda incluye una estatua de la Master Sword, el juego de Legend of Zelda, un estuche Sheikah para Nintendo Switch, un soundtrack con 24 canciones, una moneda conmemorativa y una caja especial, adem叩s de un 10% de descuento en la compra.Carpeta dk
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