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健器件。 NCO的设计采用直接数字频率合成(DDS)技术,并对DDS的相位舍位误差产生的原因进行了浅析。最后生成累加器模块和正(余)弦幅度存储器模块,实现了系统级综合和仿真。
Digital Down Conerter （DDC） is a vital device of digital receiver and Numerically Controlled Osillator（NCO） also is a key device that influences the DDC＇s function. The design NCO adopts Direct Digital Frequency Synthesis（DDS） technology ,and makes a simple analysis about deserted phase error. Finally, a mould of accumulation addition device and a mould of sin or cos range ROM are created. System synthesis and simulation are implemented.
出处
《西南科技大学学报》
CAS
2006年第1期64-66,79,共4页
Journal of Southwest University of Science and Technology
