基于数字序列划分的DDFS技术研究  

Study of DDFS based on digital sequence division

作　　者：陆斌斌[1] 孙震[1] 

机构地区：[1]哈尔滨工业大学自动化测试与控制研究所,哈尔滨150001

出　　处：《电子测量与仪器学报》2009年第3期93-98,共6页Journal of Electronic Measurement and Instrumentation

摘　　要：详细介绍并分析了一种有效压缩直接数字频率合成器(DDFS)的ROM使用量的新理论——数字序列划分法。比较分析了相位序列长度为16bits时不同分割减少ROM使用量的效果。详细叙述了用数字序列划分实现DDFS所需的存储器个数及各存储器存储的数据来源。最后推导分析了数字序列划分法应用于DDFS可能引入的误差及大小,推导了误差与分割数之间的关系,并用MATLAB仿真验证了两者之间的关系。得出在一定误差范围内数字序列划分法应用于DDFS能有效减少ROM使用量的结论。The paper presented a detailed description of a new theory i. e. digital sequence division, which was a salient ROM compression technique for direct digital frequency synthesizer, and compared ROM compression of different division for 16-bit phases sequence. The paper described the number of memory and the date stored in the memory for DDFS based on digital sequence division. Also the paper analyzed the errors that might be produced by the application of digital sequence division to DDFS, and deduced the relationship between error and division, and the simulation experiments proved the relationship with MATLAB. At last, the conclusion was that the digital sequencedivision could compress ROM size saliently for DDFS in the certain range of error.

关 键 词：数字序列划分 直接数字频率合成器 ROM压缩 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]