Efficient Power Allocation for Multiuser Cognitive Radio Networks |
| |
| Authors: | Dong Li |
| |
| Affiliation: | (1) High Performance Networking Research Center, State Key Lab of Power Transmission Equipment and System Security, College of Computer Science, Chongqing University, Chongqing, 400044, People’s Republic of China;(2) Department of Manufacturing Engineering and Engineering Management, City University of Hong Kong, Kowloon, Hong Kong |
| |
| Abstract: | Cognitive radio has been recently considered as a flexible spectrum usage model to improve the spectrum efficiency. In this
paper, we develop a new power allocation approach by geometric programming (GP) to realize the coexistence of a primary user
(PU) and multiple cognitive users (CUs) in the same frequency band. The objective is to minimize the total power consumption
of CUs while guaranteeing the not only protection of PU but also the quality of service (QoS) of multiple CUs, which is different
from previous works. In order to facilitate the centralized computation, a distributed algorithm is developed to adaptively
adjust the transmit power of each CU. Numerical results are provided to show the effectiveness of the proposed algorithm in
power saving. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
