Multipath Delay Estimation Using Signal Power Measurements from Multiple Carrier Frequencies

Global Navigation Satellite Systems (GNSS) provide users with outdoor positioning, and their applications are increasing in, e.g., navigation, autonomous driving and the Internet of Things. The main error of satellite navigation is caused by tall buildings, which reflect or block the signals. To estimate the delay of these reflections, we developed a method based on signal power measurements from multiple carrier frequencies. This article presents this new method, together with an analysis of its sensitivity to signal power measurement noise. The findings show that the novel method’s performance is better than state of the art methods, as long as the standard deviation of the measurement noise is relatively low. Thus, the method can be used to correct time of flight measurements, especially for satellite navigation systems.