UWB CHIRP信号的多径时延频域提取方法

线性调频（Chirp）脉冲具有高处理增益、低功耗、抗多径干扰、抗多普勒频移等优点。提出了一种基于Chirp信号的多径信号分辨和时延估计技术,该算法把时域信号转换到频域处理,有效地避免了时域自相关后sinc函数的旁瓣所带来的影响。该算法具有与对Chirp信号做自相关处理相同的精度,但却具有更简单的实现结构。该算法可运用于移动定位系统。

Extraction of Multipath Timedelay in Frequency Domain to UWB Chirp Signal

Chirp signal has the advantage of high processing gain,low power-consumption,anti-multipath interference,resistance to Doppler frequency shift,and so on.A technology to distinguish and estimate the multipath timedelay is proposed in this paper,which utilizes the UWB chirp signal and could be applied in the mobile location system.The algorithm changes the signal from time domain to frequency domain for processing,thus could effectively avoid the influence resulted from the sidelobe of sinc function in the traditional autocorrelation processing of chirp signal.The analysis indicates that the algorithm has the same accuracy with the autocorrelation algorithm,but is of an much easier implementation structure.