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Interference Mitigation in GNSS Receivers by a Time-Frequency Approach

机译：时频方法缓解GNSS接收机中的干扰

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摘要

Undesired interfering signals are considered to be one of the main threats to the correct behavior of new Global Navigation Satellite System (GNSS) receivers. There is a huge variety of interference that can occur in the real world, such as narrow band, wide band, impulsive, stationary, or nonstationary CWs. Processing techniques based on time-frequency (TF) distributions allow one to detect and mitigate many different types of these undesired signals. A TF mitigation technique is proposed to enable GNSS receivers to reduce the interference affecting the incoming signal. The proposed algorithm uses a synthesis technique based on the orthogonal-like Gabor expansion, in order to obtain an estimate of the interference, that is then subtracted from the input signal. In the presence of a wide class of deterministic interfering signals, the proposed mitigation strategy is effective in terms of acquisition and tracking performance and outperforms other algorithms described in the literature.
机译：不需要的干扰信号被认为是对新的全球导航卫星系统（GNSS）接收器正确行为的主要威胁之一。在现实世界中可能会发生各种各样的干扰，例如窄带，宽带，脉冲，固定或非固定CW。基于时频（TF）分布的处理技术使人们可以检测和缓解这些不希望的信号的许多不同类型。提出了一种TF缓解技术，以使GNSS接收机能够减少影响输入信号的干扰。所提出的算法使用基于类正交Gabor展开的合成技术，以获得干扰的估计，然后将其从输入信号中减去。在存在大量确定性干扰信号的情况下，建议的缓解策略在获取和跟踪性能方面是有效的，并且优于文献中描述的其他算法。

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