动目标显示(MTI)技术是雷达在杂波环境中发现目标的有效手段。改善因子能较全面地反映动目标显示雷达的工作质量，因此影响系统工作质量的因素集中表现在对改善因子的限制上。基于动目标显示改善因子，综合考虑了雷达系统各主要部件工作的稳定性、杂波内部运动、天线扫描等内部因素及气象杂波等外部因素对改善因子的限制，并以接收系统的稳定性为例，对比分析了其对一次和二次对消器改善因子的影响。

MTI is an effective measure for radar to detect targets from clutter environment. The working performance of MTI radar can be comprehensively reflected by improvement factor, and the factors influencing the system are concentrated on their limitations to the improvement factor. Basing on the MTI improvement factor, the limitations of interior and exterior factors such as equipment instabilities, internal fluctuations of clutter, antenna scanning and meteorologic clutter are considered comprehensively in this paper, and the stability of receiver system is given as an example to show the influence to the improvement factors of single and double delay-line cancellers.

TN957