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The drawbacks of high peak to average power ratio (PAPR) can outweigh all the potential benefits of Orthogonal Frequency Division Multiplexing (OFDM) signals. In this Paper, a sophisticated PAPR reduction technique, named Iterative Clipping and filtering (ICF) with DCT/IDCT transformation, is proposed for OFDM system. By considering the example of OFDM,(More)
A Wireless Local Area Network (WLAN) is a type of Local Area Network (LAN) that uses high frequency radio waves rather than wires to communicate and transmit data [1]. It is a flexible data communication system implemented as an extension to or as an alternative for, a wired LAN. It provides large companies the option to connect the current wired networks(More)
Orthogonal Frequency Division Multiplexing (OFDM) is an efficient method of data transmission for high speed communication systems. However, the main drawback of OFDM systems is that, it exhibits high Peak to Average Power Ratio (PAPR) of the transmitted signals which causes inefficient use of the High Power Amplifier (HPA) and could limit transmission(More)
In order to solve the existing security problem of the distributed network cloud disk, such as transmission, storage security problems, etc, a network cloud disk safety storage scheme based on Hadoop is proposed. Based on the different confidential level of user data, it gives selective encryption scheme, which gives full consideration to the following(More)
Secure communication is very important in computer networks and authentication is one of the most eminent preconditions. This paper proposes Session-key derivation, decentralize key management for wireless sensor networks covering the aspects of key deployment, key refreshment, and key establishment to achieve a high-level security for WSNs.
Real-time operating system (RTOS) as well as simplify the process of the design of embedded software, heterogeneous multi-core architecture becomes its an important research and application areas. TOPPERS/ASP is an open source implementation for micro ITRON 4. 0. Our study focus on the porting of TOPPERS/ASP to the omap3530 processor, which have an arm and(More)
It is with no doubt that recent trends indicate that cellular networks based on the 3G standards and wireless Local Area Networks (WLANs) coexist to offer multimedia services to end users. However, while users roam throughout this heterogeneous network, they should be automatically and transparently switched from one access technology to another such as(More)
Auto cruise control system (CCS) is a typical case of embedded real-time systems (RTES). Model-based design method describes both system software and hardware structure by the effective modeling language in RTES. That satisfies RTES real-time capability and reliability, and enhances productivity and saves cost expenses. This paper models CCS using the(More)
—The existence DNA computing models can solve most hard NP problems in theory. The graph isomorphism problem is a classical NP-hard problem. In this paper we proposed a DNA-based sticker algorithm, which uses the concept of incidence degree sequence to solve the graph isomorphism problem. The proposed algorithm is simplicity of operation and only O(2 n) DNA(More)
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