Signal Simulation of Dual-Polarization Weather Radar and Its Application in Range Ambiguity Mitigation

Atmosphere

Jianxin He¹  Maojie Xiong¹  Xuehua Li¹  Minghua Li¹  Shaojun Dai¹  Zhichao Bu²  Yajun Chen³ 

[1] College of Electronic Engineering, Chengdu University of Information Technology, Chengdu 610225, China;Meteorological Observation Center, China Meteorological Administration, Beijing 100081, China;Meteorological Observation Center, Inner Mongolia Meteorological Service, Hohhot 010051, China;

关键词: dual-polarization;    echo simulation;    range ambiguity;    batch model;    phase coding;   

DOI  :  10.3390/atmos13030432

来源: DOAJ

【 摘 要 】

In this paper, a dual-polarization weather radar echo signal simulation method is proposed for the evaluation of the performance enhancement of dual-polarization weather radar systems, the optimization of signal processing algorithms and the improvement of scanning strategies. The actual weather radar base data are used in the simulation as the reference weather scene, which avoids using a complex algorithm for weather modeling. Moreover, based on radar weather equations, the radar system parameters are added into the radar echo signal modeling to establish the relationship between the simulated echo signal and radar system. As a result, the final simulated echo signal not only shows both the time and frequency domain characteristics of the weather target, but also includes the effects of the important performance of the dual-polarization weather radar system. In addition, to evaluate the performance of range ambiguity mitigation using phase coding and batch working modes, two different simulation methods for the radar signal are established on the method above; one is for batch working mode with long-PRT (pulse repetition time) and short-PRT transmission and receiving, and the other is for phase-coded mode with phase-coded transmission and phase-uncoded receiving. Under the same weather scene, the observation of these two different methods of range ambiguity mitigation are simulated and compared. Results show that the performance of the phase coding mode for mitigating range ambiguity is better than that of the batch mode. Obviously, the simulation method can be used to directly show the observation of different algorithms for mitigation range ambiguity under the same weather process, and quickly compare and evaluate the algorithm’s performance, which is not possible for real radars.

【 授权许可】

Unknown