微波雷达高精度跟踪环路建模与仿真技术研究

针对在微弱信号(低载噪比信号)动态环境为需求背景下某测量雷达中高精度跟踪环路设计的关键问题，重点研究了载波跟踪环路和码跟踪环路的设计及优化方法。提出以单载波作为导频的信号结构，研究了锁频环与锁相环联合工作的环路结构，通过对两种结构的建模分析和仿真验证，指出在微弱信号高动态环境下，锁频串行辅助锁相环的环路组合结构具有更好的性能。对于码跟踪环路，给出了宽、窄相关间距相结合的方案。通过建模解算得出了最小跟踪误差原则下码环的最优环路带宽。仿真验证了上述算法和参数设计的有效性和可靠性。

Research on Modeling and Simulation Technology of Microwave Radar High Precision Tracking Loop

Aiming at the key problem of high-precision tracking loop design of a measurement radar for the weak signal (low carrier to noise ratio signal) in dynamic environment, the design and optimization methods of carrier tracking loop and code tracking loop are focused on. A signal structure with a single carrier as a pilot is proposed, and the loop structure of the frequency-locked loop and the phase-locked loop working together is studied. The modeling and simulation on the two structures show that for the week signal tracking in a dynamic environment, the loop combination structure of the frequency-serial auxiliary phase-locked loop performs better. For the code tracking loop, a combination of wide and narrow correlation spacing is provided. The optimal loop bandwidth design of the code loop under the principle of minimum tracking error is obtained by modeling and calculation. Simulations verify the validity and reliability of the algorithm and parameter design.