GPS接收机的窄带干扰消除技术研究

Study on Narrow-band Interference Elimination in GPS Receiver

随着干扰技术的发展,全球定位系统(GPS)抗干扰性能差的缺点日益突出,对于能有效用于工程应用的抗干扰方法的研究显得尤为重要。频域抑制干扰处理中的频域陷波法是一种可以有效地移除宽带GPS信号中窄带干扰的方法。通过对N-σ消除策略的理论分析,并结合工程实践对该方法进行数字仿真实验得出仿真结果,比对分析得出了该方法在抗干扰方面的优势和一些有益的结论及合理解释,并引申出在实际工程中运用该方法时需要考虑的实际问题,对该方法在实际工程中的应用提供一定的实践依据。

Along with the development of interference technology, it is obviously that GPS shows a poor performance on interference suppression, and the study on an anti-interference technique which can be efficiently used in engineering application becomes more important. The interference suppression technique employed is frequency-domain excision. In this way we transform the received signal to the frequency domain, compute signal statistics to determine art excision threshold, remove all spectral energy exceeding that threshold, and restore the remaining signal to the temporal domain.