摘要
以基于频谱感知的认知无线电Ad Hoc网络为基础,主要研究认知无线电网络的功率控制问题。根据频谱感知结果和信道状况,考虑功率与干扰限制的需求,为最大化认知用户的信干比,提出了一种基于频谱感知的机会功率控制算法,在保证不影响主用户正常通信的条件下,有效地控制认知用户的发送功率,提高认知系统容量。仿真结果表明该算法通过对认知用户功率的有效控制,最大程度上消除了用户之间的干扰,保证了主用户的正常通信,满足了认知用户和主用户频谱共享的需求。
In order to study the power control in cognitive radio network,a cognitive radio network based on spectrum sensing was developed.Based on spectrum sensing and channel conditions,a novel opportunistic power control algorithm based on spectrum sensing is adopted to maximize cognitive user＇ SINR.The transmitted power is dynamically adapted without causing unacceptable interference to primary user.Simulation results show that through effective power control,the novel algorithm avoids interference,guarantees the primary user＇ communication and meets the requirement of spectrum sharing between cognitive user and primary user.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2010年第6期1235-1240,共6页
Chinese Journal of Scientific Instrument
基金
国家自然科学基金(60772062)
国家重点基础研究发展计划(2007CB310607)
国家863项目(2009AA01Z241)资助
关键词
频谱感知
功率控制
频谱共享
认知无线电
spectrum sensing
power control
spectrum sharing
cognitive radio
