Joint Optimization of Spectrum and Energy Efficiency in Cognitive Radio Networks

Abstract

Cognitive Radio is a type of wireless communication in which transceiver can detect channels which are currently in use and not in use and easily move between vacant channels while avoiding used ones. For identifying which channels are in use and which are not different functionalities are required in cognitive radio networks. Cognitive engine is capable of configuring transmitter’s parameters. These parameters include "waveform, protocol, operating frequency, and networking". This unit plays as an autonomous unit in communication environment, exchanging information about the parameters with the networks it accesses and other cognitive radios (CRs).The performance and output is continuously read by CR monitor which then uses this information to determine the RF environment, channel conditions, link performance, etc. and adjusts the radio's parameter’s to deliver the required quality of service subject to an appropriate combination of user requirements, operational limitations, and regulatory constraints