UHF波段海杂波时间相关性的海浪状态影响分析  

Influence of sea condition on the temporal correlation properties of UHF band sea clutter

作　　者：许心瑜[1] 张玉石[1] 黎鑫[1] 李善斌[1] 李慧明[1] 

机构地区：[1]中国电波传播研究所电波环境特性及模化技术重点实验室,山东青岛266107

出　　处：《系统工程与电子技术》2017年第6期1203-1207,共5页Systems Engineering and Electronics

摘　　要：为了改善杂波建模效果和提升雷达目标检测算法的海洋环境适应性,基于超高频波段实测数据,分析不同海浪状态下海杂波时间相关性的时域及频域特性规律和差异。重点研究了不同海情和浪向下的去相关时间、频移及谱宽变化趋势,给出多种海洋参数组合下的参考值,并对比浪高及其他海洋参数的影响程度。结果表明,随着海情的升高,去相关时间缩短,谱宽和频移增加,特别在中高海情下随浪高变化趋势更为明显。逆浪向谱展宽程度大于侧浪向,且频移呈现随擦地角减小而增大的趋势。Based on sea clutter data collected at ultra high frequency band, temporal correlation properties under different sea conditions are analyzed in both time domain and frequency domain to improve clutter modeling performance and environmental suitability of maritime surveillance radar target detection. The decorrelation time, frequency shift, and spectral width of sea clutter are calculated separately in different sea states and sea directions, and the reference values are listed. The influence of wave height and other sea parameters is com- pared in detail. The results clearly demonstrate that with increasing sea states, the decorrelation time gets shorter, while the spectral width and frequency shift get larger, especially in the moderate and high sea states. The spectral width in the up-swell direction is larger than which in the cross-swell direction, and the frequency shift trends to be larger along with the gazing angle dcreases.

关 键 词：海杂波 超高频波段 时间相关 谱宽 频移 

分 类 号：TN957.51[电子电信—信号与信息处理]