CAJ | 학술논문

探讨了雷达数字化接收系统前端放大链与数字A/D模块级联后,接收系统的噪声系数、灵敏度和瞬时动态范围等参数的变化;研究了在工程上接收系统为获得最佳性能,前端放大链与数字A/D模块性能指标的折衷问题,推导了相应的设计公式并给出了实验验证.最后总结了在接收系统前端和A/D性能允许范围内,获得设计师希望得到的接收系统灵敏度和动态范围的方法及设计参考曲线.
탐토료뢰체수자화접수계통전단방대련여수자A/D모괴급련후,접수계통적조성계수、령민도화순시동태범위등삼수적변화;연구료재공정상접수계통위획득최가성능,전단방대련여수자A/D모괴성능지표적절충문제,추도료상응적설계공식병급출료실험험증.최후총결료재접수계통전단화A/D성능윤허범위내,획득설계사희망득도적접수계통령민도화동태범위적방법급설계삼고곡선.
The problem of matching between a receiving front-end amplifier chain and a digital A/D converter module is explored in details. Then the limit performances of a receiving system sensitivity and dynamic range are analyzed when the front-end amplifier chain and the digital A/D converter module are interconnected. An experimental test results is presented to demonstrate and compare with our deduction values in theory. Several compromising suggestions on choosing the right gain of an amplifier chain and a proper AD converter are given. Some aspects and referential curves on receiving system design are summarized which is used to obtain the required sensitivity and dynamic range within the available performances of the front-end and the digital A/D converter modules.