【摘要】 为了突破频谱稀疏性对压缩传感技术的限制,提出了一种基于压缩传感的频谱检测方法,在保证对主用户的干扰不超过指定门限的前提下,通过对目标频段的主用户信号和导频信号在频域进行线性运算,保留频谱空洞处的导频分量,把对非稀疏的主用户信号的恢复转化为对稀疏导频信号的恢复.该方法解决了认知无线电宽带频谱检测中,压缩传感技术在主用户信号非稀疏时的失效问题.仿真结果表明,导频检测方法可以对非稀疏频谱的频谱空洞位置进行准确检测.更多还原

【Abstract】 In order to break the limitations of spectrum sparse to compressed sensing technology,a pilot detection scheme is proposed based on compressed sensing in non-sparse wideband spectrum sensing.Under the premise of that the interference to authorized users does not exceed the specified threshold,the scheme makes linear operation at the primary user signal as well as the pilot signal of the target band,retain the pilot component at the spectrum holes and convert the recovery of non-sparse primary user signal to the recovery of the sparse pilot signal.The scheme resolves the failure of compressed sensing technology in cognitive radio wideband spectrum sensing when the primary user signal is non-sparse.Simulations indicate that the proposed pilot testing scheme can accurately detect the position of the spectrum hole on non-sparse spectrum.更多还原