数模变换器 meaning in English

d/a converter

Then on the basis of those , a model of software radio receiver is given . operations are determined using hardware whose configuration is under software control . finally , the circuits are realized with simulation in order to prove the discussed schemes
然后建立了软件无线电接收机的数学模型，尽可能的简化射频模拟前端，将模数数模变换器尽量靠近天线，在对信号充分数字化的基础上依靠软件来定义无线电的各项功能。