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5.1.1 信号取样及离散与连续信号快速变换雷达信号数字处理已十分普遍.模/数转换器、集成电路技术的进展,及快速付里叶算法的出现,已使产生数字信号并对其进行滤波变成实时数字处理,其优点具有更高的稳定性、重复性和灵活性.以一种适当速率对某种信号取样,并根据取样方式,信号能随时还原.若信号带宽限为B赫,则可以每秒2B取样率便不会丢失信息,根据信号取样计算频谱,导致离散付里叶变换.
5.1.1 SIGNAL SAMPLING AND DIFFERENTIAL AND DIFFERENTIAL AND CONTINUOUS SIGNAL DIGITAL TRANSFORMATION Digital processing of radar signals has become commonplace. Advances in A / D converters, integrated circuit technology, and the advent of fast Fourier algorithms have resulted in the generation and processing of digital signals Filter into real-time digital processing, the advantages of higher stability, repeatability and flexibility.Samples a signal at an appropriate rate, and according to the sampling method, the signal can be restored at any time.If the signal bandwidth is limited to B He , 2B samples per second can be no loss of information, according to the signal sampling frequency spectrum calculation, resulting in discrete Fourier transform.