From 2018 to 2021, the Japan's Ministry of Internal Affairs and Communications (MIC) conducted R&D for the weather radar signal processing to improve the efficiency of spectrum utilization. Toshiba participated in this program and developed the advanced interference suppression technique, which utilized the pulse information of interfering radars to accurately detect and suppress interference. In this work, the effectiveness of the proposed interference suppression method will be shown based on the result of the demonstration experiment using the MP-PAWR and X band parabolic weather radar.
Figure 1 shows the correlation coefficient calculated from the data acquired in the demonstration experiment in which the parabolic weather radar observed weather echoes and interference from the MP-PAWR. Compared with the correlation coefficient of weather echoes (b) and that by proposed method (d), it is confirmed that the proposed method can be suppressed interference appropriately. Next, focusing on the boxplots (e), the estimation result by the proposed method is similar to those of weather echoes without interference. For example, comparing by median values, the value of the conventional method (c) is 7.3% lower than that of weather echoes (b), however the differential rate between the proposed method(d) and (b) is only less than 1%.
Figure1:https://drive.google.com/drive/folders/1nvwoosUJo9dkgdIrhU5_QGS_zC2WL77I

