可编程数字下变频器的关键技术

Key Techniques in Programmable Digital Down Converter

可靠、灵活的数字下变频技术在无线通信系统中得到越来越广泛的应用。文中指出影响数字下变频器性能的主要因素 ,并提出采用经典的 CORDIC算法来降低硬件电路的复杂性。最后 。

As the most directly embodiment of the idea of software radio,the digital down converters(DDC) have been widely used in wireless communication field.The main factors influencing DDC performance are pointed out in this paper,and the CORDIC algorithm is used to reduce the complexity of the digital circuit of DDC.Finally,the linear insertion is used to realize the fractional times conversion of bit rate form input to out.