基于最大熵谱估计的频谱感知方法的研究

Study on Spectrum Sensing Based on Maximum Entropy Spectral Estimation

频谱感知是认知无线电系统的关键技术环节,为了减少系统间的相互干扰,要求频谱感知具有短时性、分辨率高等特点。为此,提出了基于最大熵谱估计的频谱感知方法,理论分析与仿真结果表明,基于最大熵谱估计的频谱感知方法具有感知时间短、频谱分辨率高、系统复杂度低等突出优势,可以作为认知无线通信系统设计的选择方案。

pectrum sensing is the key technology of cognitive radio systems.It must have the short-term nature and the high frequency resolution to reduce the mutual interference between systems.A method of spectrum sensing based on Maximum entropy spectral estimation（MESE） is proposed.Theoretical analysis and simulation results show that the proposed method has the advantage of short-time sensing,high frequency resolution,and low system complexity,which can be used as an optional scheme for the cognitive wireless communications system.