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An Improved Method for Reflectivity Estimation in Frequency-Sharing Weather Radar System

Dong-Woo Lim 1, Chang-Jae Chun 2,3, Hyung-Myung Kim 2,3, Jae-Han Lim 2,3, and Myung-Sun Song 2,3
1. School of Electrical Engineering, KAIST, Daejeon, Republic of Korea
2. School of Electrical Engineering, KAIST, Daejeon, Republic of Korea
3. Broadcasting & Media Research Laboratory, ETRI, Daejeon, Republic of Korea
Abstract—In frequency-sharing weather radar system where multiple radars reside in the same frequency channel, the reflectivity estimation error is dominated by the noise and the interference signals. Prior to the reflectivity estimation process, the CLEAN algorithm iteratively estimates the reflection channel, and therefore the stopping criterion of the CLEAN algorithm determines the reflectivity estimation performance. We propose the noise and interference power estimation scheme from the received signal in the presence of target, interference, and noise signals. The estimated noise pulse interference power is taken to the threshold in the stopping criterion of the CLEAN algorithm. Simulation results show that the proposed scheme outperforms the conventional scheme in terms of the reflectivity estimation performance. 
 
Index Terms—frequency-sharing weather radar, CLEAN algorithm, reflectivity estimation
 
Cite: Dong-Woo Lim, Chang-Jae Chun, Hyung-Myung Kim, Jae-Han Lim, and Myung-Sun Song, "An Improved Method for Reflectivity Estimation in Frequency-Sharing Weather Radar System," International Journal of Signal Processing Systems, Vol. 5, No. 2, pp. 60-64, June 2017. doi: 10.18178/ijsps.5.2.60-64
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