摘要
提出了基于灵活检测准则(FDC)的认知无线电宽带频谱感知算法。传统的基于信息论准则的宽带频谱感知算法在估计主用户占用的子带个数时,往往出现低估的情况。针对此情况,利用FDC改进基于Gerschgorin似然估计的认知无线电宽带频谱感知算法。相较于传统的基于信息论准则的能量检测方案,该方案不仅不依赖于噪声功率先验信息,而且可以通过改变灵活系数满足感知系统的不同要求。
Flexible detection criterion（FDC） based wideband spectrum sensing algorithm was proposed for cognitive radio in this pa- per. Based on the conventional information theory criterion, the number of the primary user occupied subbands was usually underes- timated. In order to solve this drawback, the Gerschgorin likelihood estimate method was improved by employing the FDC in wide- band sensing. Compared with conventional energy detection scheme, the proposed scheme requires no a priori knowledge of the noise power and the PU signal. Also, the proposed scheme can adjust the flexible parameter to meet the requirements in various sensing scenarios.
出处
《电子技术应用》
北大核心
2015年第11期93-96,100,共5页
Application of Electronic Technique
基金
国家自然科学基金项目(61201205
61379159)
重庆市自然科学基金项目(CSTC2012JJA40043)
