基于RMT的协作MIMO频谱感知

针对认知无线电技术中的频谱感知问题,将已经广泛应用于无线通信领域的随机矩阵理论（RMT）引入到多认知用户MIMO环境中,提出了基于随机矩阵理论的协作MIMO频谱感知算法。该算法不需要预知噪声的统计特性和噪声方差,而是利用大维随机矩阵特征值的极限分布特性进行频谱感知。新算法充分利用了协作技术及MIMO技术的优点来提高感知性能。理论分析和仿真结果均表明,新算法整体性能优于同类算法和典型的能量检测算法。

Cooperative MIMO spectrum sensing based on random matrix theory

To impro ve the effect iv eness of spect rum sensing in co gnitive radio, random mat rix theor y ( RMT) w idely used in w ir eless communicat ion netwo rks w as int roduced into mult i-cognit ive-user MIMO circumstance, and a new cooper at ive MIMO scheme for fr equency band sensing w as pr opo sed based on asymptot ic random mat rix theory . Unlike previous w ork in the field, the new scheme did not require the know ledge of the no ise statist ics o r its variance and w as related to the l imited dist ribut ion of r andom mat rices eig envalues. Bo th theoret ical analysis and the simulat ion r esult s show that the new algo rithm outperfo rms similar algo rithms and classical energ y detect ion techniques.