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The major goal of research in Mobile Ad hoc Networks (MANET) is the efficient utilization of scarce available resources while improving network throughput and network lifetime. Energy consumption is one precious component of these resources as multimedia applications consumes enormous amount of energy during communication. To achieve the goal of optimal energy conservation of a MANET, an optimal power...
This paper describes fast, efficient and global optimization method called wind driven optimization (WDO) algorithm for nulling pattern synthesis of uniformly spaced linear array having maximum side lobe level (SLL) suppression, restricted dynamic range ratio (DRR), beam width and null control by controlling the array elements amplitude-only. A broad null is placed in the direction of maximum interference...
TCP- Transmission Control Protocol is a connection oriented and reliable transport layer protocol. TCP was initially used for process-to-process communication in wired networks. When TCP is used with wireless networks, especially with the wireless mobile adhoc networks, a significant amount of performance degradation can be noticed. The main reasons are route failures, channel losses and channel contention...
Electrocardiogram (ECG) is the graphical representation of heart functionality. The ECG finds its importance in the detection of cardiac abnormalities. The electrocardiographic signals are often contaminated by noise from diverse sources. It is essential to reduce these disturbances and improve the accuracy as well as reliability. The noises that commonly disturb the basic electrocardiogram are power...
Orthogonal frequency division multiplexing has a high tolerance to multipath signals and is spectrally efficient making it good candidate high data rate systems. It is a very promising technology using adaptive rate algorithm serves well to improve performance. It appears to be a good modulation technique for high performance systems but still it has drawback such as high peak to average power ratio...
Regenerating codes are a class of recently developed codes for distributed storage that, like Reed-Solomon codes, permit data recovery from any arbitrary of nodes. However regenerating codes possess in addition, the ability to repair a failed node by connecting to any arbitrary nodes and downloading an amount of data that is typically far less than the size of the data file. This amount of...
The International Telecommunication Union (ITU) established new requirements for the next generation of wireless communications. To meet those requirements, the concept of femtocells emerged as a solution, aiming at increasing capacity and offloading the macrocell network. In a co-channel deployment between macrocells and femtocells, the interference is a serious problem and that needs to be addressed...
We consider the problem of minimizing the bandwidth required to repair a failed node when data is stored across n nodes in a distributed manner, so as to facilitate reconstruction of the entire data by connecting to any k out of the n nodes. We provide explicit and optimal constructions which permit exact replication of a failed systematic node.
In this paper, we outline an approach to the task of designing network codes in a non-multicast setting. Our approach makes use of the concept of interference alignment. As an example, we consider the distributed storage problem where the data is stored across the network in n nodes and where a data collector can recover the data by connecting to any k of the n nodes and where furthermore, upon failure...
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