New methodologies for analytically modelling and compensation of phase noise based distortions in continuous wave radar

连续波雷达中基于相位噪声的失真分析建模和补偿的新方法

• 批准号: 440304272
• 负责人: Professor Dr.-Ing. Martin Vossiek
• 金额: --
• 依托单位: Lehrstuhl für Hochfrequenztechnik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/440304272?language=en
• 关键词: New; methodologies; analytically; modelling; compensation

Critical radar parameters such as range and the probability of correctly resolving and detecting a targets and the uncertainty of measuring range and speed are greatly impacted by phase-noise-based interference in continuous wave radar such as Doppler and FMCW radar. Highly reflective targets, like reflections at the antenna radome and direct crosstalk between transmitter and receiver in conjunction with phase noise increase the noise level across the entire baseband signal. Phase noise also reduces and blurs the spectral power density at the target beat or target Doppler frequencies. The latter effect increases with the target distance. Despite the application of CW/FMCW radar at scale in industry and transportation and despite considerable research efforts, these issues, to date, have only been poorly modelled analytically based on simplified approximations. Very few methodologies have emerged as efficient solutions to the issues either. The proposed project will focus on these two research issues. The primary project objective is the fundamental investigation of a novel radar concept proposed by the applicant for compensating phase-noise-based interference in FMCW radar and its analytical verification, by simulation, as well as its empirical verification. In this ground-breaking radar concept, two opposing frequency modulated partial radar signals are transmitted simultaneously, which, when received, are converted in the mixer to two separate coherent baseband signals with phase-noise distortion components that are reverse phased. Phase-noise-based interference can be fully compensated by balancing both baseband signals, as exploratory research has indicated. This would be a game-changer in FMCW radar technology if successfully verified both analytically and experimentally. The secondary project objective is to further supplement and refine existing analytical phase noise disturbance models and simulation methodologies – indeed, the applicant has made important contributions in this regard in the past. Interference has heretofore been mainly modeled utilizing several simplifying assumptions, such as evenly distributed / white phase-noise models and small signal approximations, which were more theoretical than practical. The intention now is to consider the real colored phase-noise characteristic curves and their range-related correlation effects in the receiver mixing process. The aim is to close gaps in current radar phase noise theory. In addition, it will be possible for the first time to precisely predict and realistically simulate the interference effects in functional interfaces, which have not heretofore been well modelled. These advances will also aid the verification of the proposed new radar concept.

连续波雷达（如多普勒和FMCW雷达）中基于相位噪声的干扰极大地影响了雷达的关键参数（如距离、正确分辨和检测目标的概率以及测量距离和速度的不确定性）。高反射目标，如天线罩处的反射和发射器与接收器之间的直接串扰以及相位噪声，会增加整个基带信号上的噪声电平。相位噪声还降低和模糊了目标拍频或目标多普勒频率处的频谱功率密度。后一种效果随着目标距离的增加而增加。尽管CW/FMCW雷达在工业和运输中大规模应用，尽管进行了大量的研究工作，但迄今为止，这些问题仅基于简化的近似值进行了很差的分析建模。也很少有方法能有效地解决这些问题。拟议的项目将侧重于这两个研究问题。主要项目目标是对申请人提出的用于补偿FMCW雷达中基于相位噪声的干扰的新雷达概念进行基本研究，并通过仿真进行分析验证，以及进行经验验证。在这一突破性的雷达概念中，同时发射两个相反的频率调制的部分雷达信号，当接收时，在混频器中将其转换为具有反相的相位噪声失真分量的两个单独的相干基带信号。探索性研究表明，通过平衡两个基带信号，可以完全补偿基于相位噪声的干扰。如果在分析和实验上都得到成功验证，这将是FMCW雷达技术的游戏规则改变者。第二个项目目标是进一步补充和完善现有的分析相位噪声干扰模型和仿真方法-实际上，申请人过去在这方面做出了重要贡献。迄今为止，干扰主要是利用几个简化的假设来建模的，例如均匀分布/白色相位噪声模型和小信号近似，这些假设更多的是理论上的而不是实际的。现在的目的是考虑接收机混频过程中的真实的彩色相位噪声特性曲线及其与距离相关的相关效应。其目的是填补目前雷达相位噪声理论的空白。此外，这将是第一次有可能精确地预测和逼真地模拟功能界面中的干扰效应，迄今为止还没有很好地模拟。这些进展还将有助于验证拟议的新雷达概念。