摘要
数字下变频器(DDC)是数字接收机的重要部件,而数字振荡器(NCO)又是影响数字下变频性能的关键器件。利用EDA的方法设计NCO,这种NCO的设计采用直接数字频率合成(DDS)技术,生成累加器模块和正(余)弦幅度存储器模块,最后实现了系统级综合和仿真。
Digital down eonverter （DDC） is a vital device of digital receiver and numerically controlled oscillator （NCO） also is a key device that influences the DDC＇ s function. NCO is designed with EDA method that adopts direct digital frequency synthesis （DDS） technology, which creates a module of accumulation addition device and a module of sin or cos range ROM in this paper. Finally, the paper implements the system synthesis and simulation.
出处
《山西电子技术》
2006年第2期36-37,共2页
Shanxi Electronic Technology
