Efficient Spectrum Utilization via Pulse Shape Design for Fixed Transmission Networks

Orthogonal pulse shape design via semidefinite programming

In digital communications, orthogonal pulse shapes are often used to represent message symbols for transmission through a channel. The design of such pulse shapes is formulated as a convex semidefinite programming problem, from which a globally optimal pulse shape can be efficiently found using interior point methods. The formulation is used to design filters which achieve the minimal bandwidth...

Spectrum Efficiency Scheme Efficient Fixed Mesh Networks

Spectrum Trading for Efficient Spectrum Utilization

The conventional command and control based spectrum management has led to substantial underutilization of some spectrum bands while severely crowding others due to the uneven and dynamic needs that vary over time and at different locations. Spectrum trading has emerged as a promising management approach to substantially improve spectrum utilization and user experience in wireless communications...

Efficient Utilization of Spectrum in Cognitive Networks by Using Femtocell

In communication networks, cognitive network is a new type of data network that makes use of cutting edge technology from several research areas to solve some problems current networks are faced with. Cognitive MACs are becoming a reality for efficiently utilizing the constrained spectral resources. The spectrum opportunities are volatile and often difficult to predict. In this paper we propose...

Efficient Utilization of Spectrum in Cognitive Radio Networks

-The main function of the cognitive Radio (CR) is to use spectrum efficiently and accurately. In this paper, the main aim is to use the spectrum efficiently, which has been allocated to different organizations or companies by centralizing the spectrum. This centralization spectrum can also be taken from the companies which are not utilizing the spectrum presently.