Time Domain Signal Simulation of Weather Clutter for an Airborne Radar Based on Measured Data

Abstract

An airborne radar simulator for an X-band radar echo signal was implemented and numerically verified. The simulator can consider weather conditions over a large area and can use measured S-band data as input. A scheme is presented for the conversion of the S-band data to the X-band one. The amplitude and time delay due to weather particles can be theoretically calculated on the basis of reflectivity. The dynamics of the platform and clutter particles were modeled using the Doppler frequency shift in the echo signal. As the simulated weather area was very large, an efficient approximation method was designed for use in calculating the attenuation and time delay, which was also numerically verified. Finally, a scheme for extracting the reflectivity from the echo signal was formulated and was verified by comparing it with the input data.

Characteristics of Land Clutter Signals and Their Synthesis Methods

“…클러터 모델을 생성하기 위해서는 다양한 표면과 볼륨 으로부터 반사된 클러터 신호들의 통계적인 분포를 이해 하는 것은 필수적이다. 일반적으로 클러터 신호는 지면, 해상, 볼륨 클러터와 같은 운용모드로 나눌 수 있고 [9] , 바 람의 세기와 지표면의 상태와 같은 다양한 환경 변수, 레 이다의 성능 변수에 따라서도 다양하게 영향을 받는다.…”

Shooting and bouncing rays for sparse particles (SBR-SP) applied for multiple magnetodielectric circular cylinders

“…using the reflectivity estimation [3] of echo signals at the X-band range. In addition to [1]- [3], a lot of statistical and probabilistic studies [4], [5] have been conducted to accurately model rain attenuation and signal variation in diverse rainy conditions.…”

“…using the reflectivity estimation [3] of echo signals at the X-band range. In addition to [1]- [3], a lot of statistical and probabilistic studies [4], [5] have been conducted to accurately model rain attenuation and signal variation in diverse rainy conditions. The Mie scattering theory for spherical raindrops as presented in [4], [5] is judiciously combined with probability distributions, and scattered electromagnetic fields by random media are used to represent rain attenuation through variously distributed scatterers.…”

Airborne Monopulse Radar Echo Signal Generation from Surface Clutter Including Weather Clutter Effect

“…그리고   는 두 편파(H와 V 편파)에 대한 z-parameter이고, 은 레이다와 작은 박스 중점 사이의 거 리이다. 크기 계산 후 기상 클러터 내부의 신호 전파길이 에 따른 신호의 감쇠/지연을 고려하여 신호의 크기와 임 펄스의 시간 위치를 변화시킨다 [13] . 한 레인지 빈(range bin)의 신호는 같은 거리 해상도에 속한 작은 박스의 반사 신호를 모두 합하여 생성한다.…”