ABSTRACT
Cognitive Radio (CR) is an adjusting of quick, ready intelligence radio and network technology that can automatically discover ready narrow ways in a radio band and change sending parameters making able to more making connections to run taking place together and also get well radio operating behaviour. CR uses a number of technologies including adjusting radio and software formed radio (SDR) where old and wise hardware parts including mixers, modulators and makes greater have been put in place of quick, ready intelligence software. Wi-Fi based wireless terminal structure block that can be used to design cognitive radio network (CRN). In this paper the design procedure of cognitive radio network using IEEE 802.11 wireless standards is given. Also new reactive routing protocol namely Improved Ad-hoc On-demand Multipath Distance Vector (IMAOMDV) which is extension of Adhoc On-demand Multipath Distance Vector (AOMDV) is designed. The performance of Wi-Fi based CRN is evaluated by its performance parameterslike average throughput, average end to end delay and packet delivery ratio. Finally designed routing protocol’s performance is compared with various reactive and proactive routing protocols.
