| 摘要: |
| 针对超宽带高动态目标信号的高精度模拟问题，通过详细分析目标运动对超宽带信号的包络和频率带来的影响，提出了一种复包络重采样模拟方法。该方法根据目标时变的距离时延实时计算重采样时刻，结合任意精度内插生成目标信号的复基带序列。相较于传统的多普勒频偏模型模拟方法，该方法准确地刻画了目标信号在时间尺度上的实时伸缩特性，不仅能更好地模拟高动态目标的时变多普勒特性，还能模拟超宽带目标信号的包络变化，并且保留了目标信号的初始相位特性。通过对超宽带目标信号模拟的仿真，验证了该方法的有效性。 |
| 关键词: 信号模拟 超宽带 复包络重采样 时变多普勒 |
| DOI： |
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| 基金项目:新型微波探测技术教育部工程研究中心开放基金 |
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| An ultra-wideband target signal simulation method based on complex envelope resampling |
| LIU Qi,ZHOU Liangchen,ZHOU Shisong |
| (School of Electronic Engineering,Chengdu University of InformationTechnology,Chengdu 610225,China) |
| Abstract: |
| For the high-precision simulation of ultra-wideband(UWB) and high-dynamic target signals,a complex envelope resampling simulation method is proposed through detailed analysis of the impact of target motion on the envelope and frequency of the UWB signal.The method calculates the re-sampling time in real time according to the time-varying distance delay of the target,and generates the complex baseband sequence of the target signal with arbitrary precision interpolation.Compared with the traditional Doppler frequency offset model simulation method,this method accurately depicts the real-time expansion and contraction characteristics of the target signal on the time scale.It can not only better simulate the time-varying Doppler characteristics of high dynamic targets and the envelope change,but also retain the initial phase characteristic of the target signal.The effectiveness of the proposed method is verified through the experiment of UWB target signal simulation. |
| Key words: signal simulation ultra-wideband complex envelope re-sampler time-varying Doppler |
