提出一种基于改进的正交频分复用(0FDM)循环谱检测算法,该算法检测率高,所需检测时间短,运算复杂度几乎不变.仿真结果表明,与传统循环谱算法相比,该算法在信噪比低1个数量级而检测时间不变的情况下,检测性能仍优于传统循环谱算法,增强了对微弱信号的检测能力,提高了频谱检测的性能.
A new orthogonal frequency division multiplexing (OFDM) cyclic spectrum detection scheme is presented based on intended signature. Compared with original schemes, the proposed scheme will improve the detection performance under condition of a lower signal-noise-ratio and un-increased detection duration. This scheme enhances the robust of against noise uncertainty effectively, and gets a robustly result of detecting weak signals and improves the detection performance.