摘要
针对分布式多输入多输出(Multiple-Input Multiple-Output,MIMO)天波超视距雷达,采用数字射线追踪计算各收发通道相对于观测海面的入射和返回散射的方位角和俯仰角,导出任意收发通道一阶和二阶双基地海杂波归一化雷达散射截面积(Radar Cross Section,RCS)表达式;在与收发传播路径的多普勒传递函数相卷积后,结合雷达方程得到接收端的海杂波功率谱密度;最后,根据该功率谱密度仿真接收端海杂波加噪声的随机时间序列,并对其特性进行简要分析.
For each transmitter-receiver channel of distributed multiple-input multipleoutput(MIMO)sky-wave over the horizon radar,the elevation and azimuth angle of input and back scatter direction relative to the observed sea surface is calculated by means of numerical ray tracing,the formula of the first and second order sea clutter normalized raldar cross section(RCS)is derived.After convoluting with Doppler transfer function of the transmitting and receiving channel,the sea clutter power spectrum of receiver is obtained by combining with the radar equation.The random time sequences of sea clutter plus noise is simulated based on the power spectrum,of which characteristics is analyzed concisely.
出处
《电波科学学报》
EI
CSCD
北大核心
2015年第3期576-582,共7页
Chinese Journal of Radio Science
基金
国家自然科学基金(No.61179017
61201445
61002045
61302008)
"泰山学者"建设工程专项经费
