摘要
目前多天线频谱检测主要通过对信号能量、循环平稳性等信息进行统计判决实现。针对这一问题,考虑多天线的接收环境,提出一种利用接收信号间频域相位差信息进行频谱检测的算法,并将最小二乘估计应用到实际的频谱检测过程。理论分析与仿真结果表明,在接收环境较差时,本算法依然可以保持较好的频谱检测性能。
In this paper, a multi-antenna spectrum sensing method utilizing phase diff^rence in fre- quency domain between received signals is proposed. Different from most of the other multi-antenna spectrum sensing methods which mainly refer to signal features such as signal energy and cyclosta- tionary, the method proposed attempts to use the phase differences in frequency domain between re- ceived signals resulted from the use of multi-antenna. Theoretical analysis of the proposed method as well as the practical implementation is based on the least squares estimation (LSE). Simulation re- sults suggest that the proposed method is capable of achieving a good spectrum sensing performance, even in the presence of moderately low SNR and small number of symbols.
出处
《信息工程大学学报》
2016年第3期257-260,265,共5页
Journal of Information Engineering University
基金
国家自然科学基金资助项目(61201380)
关键词
多天线频谱检测
频域相位差
最小二乘估计
线性估计
multi-antenna spectrum sensing
phase difference in frequency domain
least squares estimation (LSE)
linear estimation