Simulation of Sea Clutter at Various Frequency Bands
Simulation of Sea Clutter at Various Frequency Bands
复制标题
DOI：
10.1163/1569393053303893
复制
发表时间：
2005-01
影响因子：
1.3
通讯作者：
F. Arıkan;N. Vural
中科院分区：
文献类型：
--
作者：
F. Arıkan;N. Vural
海杂波是影响近海面目标检测与跟踪的主要因素。海面雷达回波是雷达和海面参数的复杂函数。雷达杂波的计算机模拟可以提供雷达回波的情况下，没有封闭的形式的表达式，实验结果是稀缺和昂贵的。本文将以前开发的雷达仿真程序扩展到UHF、L、S、C和X波段，得到海杂波值。仿真程序在雷达背景中实时跟踪后向散射电磁波。返回信号被单独记录沿着与他们的偏振，振幅，相位，到达时间和多普勒频移。该程序是模块化的，因此可以插入所需的雷达和海面模型，以实现各种雷达场景。该方法可以对回波信号进行单独处理，即使在实验上难以实现的情况下，也可以在时间和频率上研究杂波的特性。给出了海面后向散射归一化雷达散射截面（NRCS）随极化、海况、掠射角和频率变化的仿真结果。当模拟的NRCS值与文献中的可用数据进行比较时，观察到非常好的一致性。雷达仿真程序证明了它是一个通用的工具，可以在计算机上生成雷达场景，并获得可靠的杂波合成数据，这些数据可以用于更成功的目标检测和杂波抑制的信号处理算法。
Sea clutter is a major degrading factor in detection and tracking of targets very close to sea surface. Radar returns from the sea surface are a complex function of radar and sea surface parameters. Computer simulation of radar clutter can provide radar returns for cases where closed form expressions are not available, and experimental results are scarce and expensive. In this paper, a previously developed radar simulation program is extended to obtain sea clutter values for UHF, L, S, C and X bands. The simulation program traces the backscattered electromagnetic waves in time in the radar background. The returns are individually recorded along with their polarization, amplitude, phase, arrival time and Doppler shift. The program is modular so desired radar and sea surface models can be inserted to realize various radar scenarios. The returns can be individually processed and the characteristics of clutter can be investigated in time and frequency even for scenarios which are difficult to be realized experimentally. The simulation results for the sea surface backscatter normalized radar cross section (NRCS) are presented with respect to the variations in polarization, sea state, grazing angle and frequency. When the simulated NRCS values are compared with the available data in the literature, a very good agreement is observed. The radar simulation program proves itself to be a versatile tool to generate radar scenarios on the computer and obtain reliable synthetic data for clutter which can be used for more successful signal processing algorithms for target detection and clutter suppression.