Titlebook: Advances in Communication Systems and Electrical Engineering; Xu Huang,Yuh-Shyan Chen,Sio-Iong Ao Book 2008 Springer-Verlag US 2008 OFDM.O

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Enterprise in the Information Agenstrained sensor networks, such as random key predistribution schemes, plain text key exchange schemes, and transitory master key schemes.In WSNs, hierarchical clustering provides scalability, self-organization, and energy efficient data dissemination [6]. A number of cluster formation protocols hav

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Business Networking im Internetrsonation of tags, or channel eavesdropping. These attacks are rendered more practicable because of the tags’ lack of computational and storage capacity. There are many papers investigating these issues in various ways [7, 8, 10–12, 14]. Today’s challenge is to find protocols (or deployments) which

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Business Networking in der Praxistion delegations between subjects are only carried out by authorization management users. However, in distributed systems, networks, and cooperative computing systems, the numbers of users, permissions, and resources usually are large, and the relations among them are very complicated. Thus central

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Advances in Communication Systems and Electrical Engineering978-0-387-74938-9Series ISSN 1876-1100 Series E-ISSN 1876-1119

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Rainer Alt,Elgar Fleisch,Hubert Österlerequire very high transmission capacity. In this paper, we apply multiple antennas to MB-OFDM UWB system for high performance. With an emphasis on a preamble design for multichannel separation, we address the channel estimation in MB-OFDM system with multiple antennas. By properly designing each pre

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Enterprise in the Information Ageanaged more elaborately. In many cases, it is very useful to have a middleware that takes control over the connection management, fault management, and communication management. Most current approaches concentrate on a subset of topics to be determined in this context. This chapter will take a close