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High resolution localization of narrowband radio emitters based on doppler frequency shifts

机译：基于多普勒频移的窄带无线电发射器高分辨率定位

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摘要

Direct position determination; Emitter localization; Maximum likelihood; Minimum variance distortionless response (MVDR)%The localization of stationary narrowband radio emitters using multiple moving receivers is considered. Most of the methods addressing this problem are based on two processing steps. In the first step, each receiver independently extracts signal measurements at several locations along its trajectory. Such measurements are the Doppler frequency shift or the frequency difference from a reference receiver. In the second step, these measurements are used for geolocation. On the other hand, the direct position determination method advocates using the observations from all the receivers together in order to estimate the location in a single step. This single-step method is known to outperform two-step methods when the signal to noise ratio is low. In this paper, we propose a direct-position-determination-based method for Doppler-based localization of multiple emitters that transmit unknown signals. The method can only be used for narrowband signals, namely, the signals’ bandwidth must be small compared to the inverse of the propagation time between the receivers. The method does not require knowledge of the number of emitters. It is based on minimum-variance-distortionless-response considerations to achieve a high resolution estimator that requires only a two-dimensional search for planar geometry, and a three-dimensional search for the general case.
机译：直接位置确定；发射极定位；最大似然;最小方差无失真响应（MVDR）％考虑使用多个移动接收器的固定窄带无线电发射器的定位。解决此问题的大多数方法都基于两个处理步骤。第一步，每个接收器独立地沿其轨迹在几个位置提取信号测量值。这样的测量是多普勒频移或来自参考接收机的频率差。第二步，将这些测量值用于地理位置定位。另一方面，直接位置确定方法主张一起使用所有接收器的观测值，以便在单个步骤中估计位置。当信噪比很低时，这种单步方法优于两步方法。在本文中，我们提出了一种基于直接位置确定的方法，用于对传输未知信号的多个发射器进行基于多普勒定位。该方法只能用于窄带信号，即与接收器之间的传播时间成反比，信号的带宽必须较小。该方法不需要知道发射器的数量。它基于最小方差无失真响应的考虑，以实现高分辨率估计器，该估计器仅需要二维搜索平面几何形状，而仅需要三维搜索即可。

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  • 来源
    《Signal processing》 |2017年第12期|288-298|共11页
  • 作者

    Tirer Tom; Weiss Anthony Joseph;

  • 作者单位

    The School of Electrical Engineering, Tel Aviv University, Tel Aviv 69978, Israel;

    The School of Electrical Engineering, Tel Aviv University, Tel Aviv 69978, Israel;

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