问题 大侠翻译一下急用

With the development of digital technology, wireless receiver in an increasing number of analog functions will gradually from the number of software or hardware replaced. For example, the goal of software radio is the application of digital technology as much as possible to the nearest antenna components, to achieve broadband A / D converter, thereby receiving antenna in the output of direct output of digital radio frequency (RF) signal, and then through the DSP device programming To realize all the behind the receiver functions. One of the key technical difficulties and one of the means to achieve high-speed A / D converter. As for speed, accuracy and dynamic range have special requirements, broadband A / D converter also different from the general works in digital. Based on the A / D converter the basic principles and characteristics of the broadband A / D converter technology and A / D converter, the choice of a number of exploration and study. In digital radio systems, broadband