基于VSLMS-Rake模型的高阶多径BOC信号捕获方法*

针对高阶多径BOC信号捕获存在模糊性的问题,提出了一种基于VSLMS-Rake模型的捕获方法。该方法首先将接收的多径BOC信号经过VSLMS-Rake模型,然后再对处理后的信号进行功率谱估计。通过二者结合,不仅可以抑制多径干扰增强信号能量,还可以减小估计误差提高捕获概率,最终实现对高阶多径BOC信号的精确捕获。理论和仿真表明,在较低信噪比下,该方法优于现有其它捕获算法。

Acquisition Method of High Order Multipath BOC Signals Based on VSLMS-Rake model

For the problem of ambiguous acquisition of high order multipath BOC signals, an acquisition method is proposed based on VSLMS-Rake model. Firstly, put the received signals through the VSLMS-Rake model, and then estimate the power spectrum of the processed signal. By the combination of that two steps, the method does not only can restrain multipath interference and enhance the signal energy, but also can reduce estimation error and improve the probability of capture, to accurately capture high order multipath BOC signals. Theoretical and simulation results show that, under the low SNR, the method is superior to other algorithms.