Title :
Interference-aware power allocation in soft decision fusion (SDF) based cooperative spectrum sensing
Author :
Das, D. ; Das, S.
Author_Institution :
Dept. of Electr. Eng., Nat. Inst. of Technol., Rourkela, India
Abstract :
Spectrum sensing is very crucial in cognitive radio networks (CRNs) for ensuring reliable data transmission. Additionally, it helps in providing sufficient protection to the licensed user against the interference. In CRNs, throughput maximization is becoming a key challenge in the presence of interference or collision to the primary user (PU). This directly affects the spectrum efficiency, and hence spectrum access opportunities get reduced. In this paper, we model an adaptive interference aware framework in soft decision fusion (SDF) based cooperative spectrum sensing (CSS) with power and sensing time optimization which jointly maximizes the system throughput under the constraint of interference power results from imperfect spectrum sensing. In this study, status of the PU during the data transmission period is considered as an exponential transition probability, and accordingly we formulate the interference constraint throughput maximization model. Simulation results validate the proposed adaptive algorithm framework for maximizing the system throughput by jointly optimizing the sensing time and transmitted power allocation to the CR users.
Keywords :
cognitive radio; cooperative communication; data communication; optimisation; probability; radio networks; radio spectrum management; radiofrequency interference; sensor fusion; signal detection; software radio; telecommunication network reliability; CRN; PU; SDF based cooperative spectrum sensing; adaptive interference aware framework; cognitive radio network; data transmission period; data transmission reliability; exponential transition probability; interference-aware power allocation; power allocation transmission; primary user; soft decision fusion; throughput maximization model; Adaptive algorithms; Cascading style sheets; Data communication; Interference; Resource management; Sensors; Throughput; SDF; cognitive radio networks; power allocation; sensing time; spectrum sensing; system throughput;
Conference_Titel :
India Conference (INDICON), 2014 Annual IEEE
Conference_Location :
Pune
Print_ISBN :
978-1-4799-5362-2
DOI :
10.1109/INDICON.2014.7030618