一种脉冲超宽带测控信号捕获方法

发布时间：2018-05-10 12:57

本文选题：脉冲超宽带 + 测控　；参考：《电子与信息学报》2017年08期

【摘要】：脉冲超宽带测控系统作为一种航天测控新体制,可有效提高系统的隐蔽性和抗干扰性。该文针对脉冲超宽带测控信号的捕获问题,提出利用基于部分匹配滤波与快速傅里叶变换(Partial Matched Filtering and Fast Fourier Transform,PMF-FFT)的捕获方法完成对脉冲相位、伪码相位和多普勒频率的3维捕获。又针对搜索空间大、捕获时间长和多普勒频率估计精度低的问题,提出了一种改进的捕获方法。该方法采用两步捕获法对时延相位进行捕获,同时利用修正的Rife算法对多普勒频率进行进一步精细估计。仿真结果表明,该方法可有效提高捕获速度,减小捕获时间,且能显著提高多普勒频率估计精度。
[Abstract]:As a new system of space measurement and control, pulse ultra-wideband measurement and control system can effectively improve the concealment and anti-interference of the system. Aiming at the acquisition problem of pulse ultra-wideband (UWB) measurement and control signals, this paper presents a method based on partial Matched Filtering and Fast Fourier transform (partial Matched Filtering and Fast Fourier transform) and fast Fourier transform (FFT) to capture pulse phase, pseudo-code phase and Doppler frequency. Aiming at the problems of large search space, long acquisition time and low accuracy of Doppler frequency estimation, an improved acquisition method is proposed. The two-step acquisition method is used to capture the phase of the delay and the modified Rife algorithm is used to estimate the Doppler frequency. The simulation results show that the proposed method can effectively improve the acquisition speed, reduce the acquisition time, and improve the Doppler frequency estimation accuracy significantly.
【作者单位】：装备学院;
【分类号】：TN911.3

【参考文献】