surrounding the 60 GHz carrier frequency has the ability to accommodate high-throughput wireless communications. While the size and availability of this free spectrum make it very attractive for wireless applications, 60 GHz implementations must overcome many challenges. For example, the high attenuation and directional nature of the 60 GHz wireless channel as well as limited gain amplifiers an...

This paper Investigates the performance of cellular networks employing multi-user MIMO transmission using dirty paper and block-diagonalization precoding. Considers the downlink of an OFDM-based LTE compliant multi-carrier system in which the users provide channel state information (CSI) to the base station via limited capacity feedback links. With limited feedback, residual interference betwee...

A new wireless communication system denoted as Multi-Code Multi-Carrier CDMA (MC-MC CDMA), which is the combination of Multi-Code CDMA and Multi-Carrier CDMA, is analyzed in this paper. This system can satisfy multi-rate services using multi-code schemes and muti-carrier services used for high rate transmission. The system is evaluated using Traveling Wave Tube Amplifier (TWTA). This type of am...

Communications networks are changing dramatically as lines blur between traditional telecom, wireless, and cable networks. The value of bundling communication services is accelerating carrier investment in triple-play (voice, video, and data) networks. Managing these services on a common IP network leads to a dramatic reduction in operational expenses. In addition, this migration to IP networks...

In this paper, we consider the improvement of packet error rate on wireless multi-hop networks. One of the important and interesting techniques for wireless multihop networks is multi-path routing. By using multipath routing, multiple routes can be established from a source node to a destination node. In this paper, we propose the error correcting scheme in which the coded different packets are...

Title of dissertation: Fast Scalable Peer-to-Peer Lookup Services for Multi-Hop Wireless Networks Min-Ho Shin Doctor of Philosophy, 2007 Dissertation directed by: Professor William A. Arbaugh Department of Computer Science Distribution Date (version) : Jan. 15, 2008 Recent years have seen growing popularity of multi-hop wireless networks such as wireless mesh networks and sensor networks. Such ...

Single-path routing protocols cannot satisfy the need of Wireless multimedia Sensor networks, and Multi-path routing protocols have many advantages in wireless multimedia sensor networks. Recent years, some researchers have proposed many multi-path routing protocols. The paper introduces and outlines the different multi-path routing protocols in WMSNs and classifies them according to their char...

Frequency division multiplexing (FDM) is a technology that transmits multiple signals simultaneously over a single transmission path, such as a cable or wireless system. Each signal travels within its own unique frequency range (carrier), which is modulated by the data (text, voice, video, etc.). For multimedia implementations, consider the more efficient and robust OFDM (orthogonal frequency d...

Fog computing (FC) models the cloud paradigm expedient by bridging breach between centralized data servers and diverse terrestrially distributed applications. It wields various wireless sensor networks (WSNs) that sprawl in core of any IoT Consequently, operation fog network turns on efficiency WSNs operation, while all-inclusive energy consumption depends both FC operation. This paper addresse...

wireless sensor networks (wsns) have many applications in the areas of commercial, military and environmental requirements. regarding the deployment of low cost sensor nodes with restricted energy resources, these networks face a lot of security challenges. a basic approach for preparing a secure wireless communication in wsns, is to propose an efficient cryptographic key management protocol be...