Title :
On optimal power allocation for minimizing interferene in relay assisted cognitive radio networks
Author :
Maity, Somnath ; Maji, Chinmoy
Author_Institution :
Dept. of Electron. & Commun. Eng., Coll. of Eng. & Manage. Medinipur, Kolaghat, India
Abstract :
This paper focuses on minimization of interference to primary user (PU) through an optimal strategy of power allocation algorithm for source and relay nodes in multihop cognitive radio network (CRN) under the constraints of outage probability (successful delivery) and data rate over source-destination link. This objective is also studied in the framework of enhanced lifetime of the CRN. Extensive simulations are done for both energy aware (EA) and non-energy aware (NEA) power allocation schemes. Simulation results show that NEA based power allocation offers better capacity than EA scheme at the cost of slightly increased interference to PU. Simulation results also show a three dimensional (3D) relative trade-off performance among the data transmission capacity, network lifetime and total transmission power.
Keywords :
cognitive radio; data communication; interference suppression; probability; radio links; radio networks; radiofrequency interference; relay networks (telecommunication); telecommunication network reliability; EA optimal power allocation algorithm; NEA optimal power allocation algorithm; PU; data transmission capacity; energy aware power allocation scheme; interference minimization; multihop cognitive radio network lifetime; nonenergy aware power allocation scheme; outage probability constraints; primary user; relay assisted CRN; source-destination link; total transmission power; Cognitive radio; Data communication; Interference; OFDM; Relays; Resource management; Simulation; Cognitive radio network; interference minimization; network lifetime; power allocation; relay;
Conference_Titel :
Contemporary Computing and Informatics (IC3I), 2014 International Conference on
Conference_Location :
Mysore
DOI :
10.1109/IC3I.2014.7019823
