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提出了一种基于快速伪谱修正的四阶累积量TLS-ESPRIT算法。该算法充分运用了四阶累积量矩阵的数据信息,不但能较准确地估计Chirp扩频系统信道多径时延,而且可有效地识别和剔除虚径,进而建立在时延估计基础上的多径幅度估计就更可靠。针对关键参数在仿真设计和工程应用中的设置,列出了它们需要遵从的三个关系。最后以IEEE802.15.4a信道为传输环境,对该算法进行了仿真验证,并与四阶矩TLS-ESPRIT算法和伪谱搜索算法作了性能对比。
A fourth-order cumulant TLS-ESPRIT algorithm based on fast pseudospectral correction is proposed. The algorithm makes full use of the fourth-order cumulant matrix data information, not only can more accurately estimate Chirp system channel multipath delay, but also can effectively identify and eliminate the virtual path, and then build on the delay estimation based on more Path estimation is more reliable. For the key parameters in the simulation design and engineering settings, lists the three relationships they need to comply with. Finally, based on the IEEE802.15.4a channel as the transmission environment, the algorithm is verified by simulation and compared with the fourth-order TLS-ESPRIT algorithm and the pseudo-spectral search algorithm.