论文部分内容阅读
本文对高频脉冲讯号近似匹配滤波器的最佳通频带问题,作了一些补充、统一和简化。 对单个矩形高频脉冲的近似匹配滤波器,本文讨论了矩形高频脉冲在失谐的情况下通过矩形频率特性系统时的最佳通频带,得出了计算公式。 对于等幅矩形脉冲串的情形,本文将前人的一些结果在计算方面作了简化和统一。明确指出了有衰减但频带不受限制的延时反馈系统的最佳衰减值和具有单谐振回路特性梳齿的梳形滤波器的最佳梳齿通频带间的对应关系,并用文献上的数据作了比较。 对于非等幅矩形脉冲串的情形,本文讨论了频带有限的延时反馈系统对包迹为梯形的矩形脉冲串进行积累的情形,得出了输出端讯噪比的表示式。为了求得最佳通频带,进行了一些数字计算,作出曲线。从曲线中得到这一系统对包迹为梯形的矩形脉冲串积累时,存在有最佳通频带,它的宽度比对等幅矩形脉冲串积累时的最佳通频带为宽。
This paper makes some supplements, unification and simplification of the optimal passband of the high-frequency pulse signal to approximate the matched filter. For the approximate matched filter of a single rectangular high-frequency pulse, this paper discusses the formula of the optimal passband when the rectangular high-frequency pulse passes through the rectangular frequency characteristic system under detuning. For the case of rectangular pulse with constant amplitude, this paper simplifies and unifies some previous results in terms of calculation. The corresponding relationship between the best attenuation value of a delayed feedback system with attenuation and unrestricted band and the best comb frequency band of a comb filter with a single resonant circuit comb has been clearly pointed out. Made a comparison. In the case of non-rectangular pulse trains, this paper discusses the case of rectangular pulse trains with trapezoid envelope accumulated by the finite-delay time-delay feedback system, and gives the expression of signal-to-noise ratio at the output. In order to find the best passband, some numerical calculations were made and curves were made. When this system is derived from the curve, it accumulates as a trapezoidal rectangular pulse train, there is an optimum passband whose width is wider than the best passband when the rectangular pulse train is accumulated.