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1.引言 一般文献在讨论如脉冲压缩、合成孔径等数字信号处理技术时,都假定系统中的振荡源是理想的,即认为它不存在相位噪声,因此不会对信号处理产生不良影响。这个假定当然与实际情况有出入,因此有必要加以研究和修正。但振荡起伏对信号处理的影响相当复杂,很多情况难以利用经典理论来解决。本文提出用蒙特卡罗计算机模拟法来估算这种影响,并以脉冲压缩为例来阐述这一思想。振荡源的相位噪声谱密度则以常用
1. INTRODUCTION In general discussions of digital signal processing techniques such as pulse compression and synthetic aperture, the general literature assumes that the source of oscillation in a system is ideal, that is, it does not have phase noise and therefore does not adversely affect signal processing. Of course, this assumption is different from the actual situation, so it is necessary to study and amend it. However, the influence of oscillation fluctuation on signal processing is quite complicated, and in many cases it is difficult to solve the problem by using classical theory. In this paper, Monte Carlo computer simulation is used to estimate this effect, and the impulse compression is used as an example to illustrate this idea. The phase noise spectral density of the oscillating source is commonly used