为实现混响室中威布尔分布杂波的有效模拟,营造逼真的雷达电磁环境,基于广义平稳非相关散射电磁环境下混响室信道衰落特性,通过控制幅度调制信号对衰落系数进行补偿,提出一种基于时域波形设计的混响室地杂波模拟方法.通过调节输入信号序列中大、小幅度脉冲比例,改变混响室传统输入信号的零均值幅度特性,以实测地杂波统计特性为参考,最终得到与实测数据统计特性参数一致的混响室杂波电磁环境.用最大似然估计和KS检验法对实验数据作参数估计和假设检验,实测地杂波数据拟合于标准威布尔模型,混响室实验数据拟合于实测地杂波幅度统计模型,从而实现了实测地杂波起伏特性的混响室有效模拟.

In order to achieve an effective simulation for Weibull distribution clutter and create a realistic radar environment,a simulation method for ground clutter in a reverberation chamber based on time-domain waveform design is proposed.This method is based on the fading characteristics of a reverberation chamber channel under generalized stationary uncorrelated scattering and controls the amplitude modulated signal to compensate for the attenuation coefficients.By adjusting the ratio of large and small pulse amplitudes in the input signal sequence,the zero mean amplitude characteristics of the conventional input signal of the reverberation chamber can be changed.Then,by using the measured statistical characteristics of ground clutter as a reference,the obtained electromagnetic environment of the ground clutter in the reverberation chamber is consistent with the statistical parameters of the experimental data.Maximum likelihood estimation and KS-test methods are adopted for the parameter estimation and hypothesis verification.Moreover,the measured data of ground clutter fits the standard Weibull model and the experimental data from the reverberation chamber fit the statistical model of measured ground clutter amplitude.It is proven to be possible to achieve an effective simulation of the actual measurements of ground clutter fluctuation characteristics using a reverberation chamber.