A Centralized Cooperative Power Control Algorithm for Cognitive Radio Networks
محل انتشار: بیستمین کنفرانس مهندسی برق ایران
سال انتشار: 1391
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 1,986
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شناسه ملی سند علمی:
ICEE20_482
تاریخ نمایه سازی: 14 مرداد 1391
چکیده مقاله:
In cognitive radio networks, coexistence of primary users (licensed users) and secondary users needs a power control algorithm employed by secondary users to avoid harmfulinterference and guarantee acceptable minimum signal-tointerference- plus-noise ratio (SINR) to the primary users. In thispaper we present a centralized cooperative power control algorithm for cognitive radio networks in which a Central Base Station (CBS) collects secondary users’ side-information andfinds maximum number of secondary users who can achieve their target-SINRs while their total interference caused to primaryusers is kept bellow a given threshold. In our proposed algorithm each secondary user upon detecting a primary receiver estimatesits location (distance and direction) with respect to the detected primary receivers and sends this side-information to the CBS.Assuming that, CBS knows locations of secondary users; CBS employ our proposed power control algorithm to find as many as possible secondary users who can coexist with primary users.Our simulation results show that complexity of our proposed algorithm is very low as compared to the exhaustive-search and itresults in maximum number of supported secondary users (those who can reach their target-SINRs) keeping their total interference to primary users bellow a given threshold
کلیدواژه ها:
نویسندگان
Amir Allahyari
Shiraz University of Technology (SUTech
Mahmoud Rashidpour
Shiraz University of Technology (SUTech
Mehdi Rasti
Amirkabir University of Technology