基于DDS的谐波被抑制的直接数字调频信号失真分析
nalysis of distortion of direct digital frequency modulated signal with harmonic restrained based DDS
推导了基于DDS的谐波被抑制的直接数字调频（DDFM）信号的频谱解析式，以理想FM信号为参照，定义了DDFM信号的新失真指标：通带内失真总功率(TDI)， TDI仅与调制指数β正相关，与调制信号每周期抽样数Rsf反相关。得到的拟合多项式揭示了TDI与Rsf、β的定量关系。
nalytical expression of direct digital frequency modulated（DDFM）signal with harmonic restrained based DDS is obtained, set ideal FM signal as reference, define new measurement of distortion of DDFM signal: total distortion power in pass band(TDI), TDI is only in positive correlation with modulated index βand negative with sampling num Rsf in a period of modulating signal. A fitting polynomial is obtained to reveal the quantitative dependence of TDI on β and Rsf .
楼培德、王雨
电子技术概论无线电、电信测量技术及仪器电子电路
直接数字调频S频谱失真
direct digital frequency modulated DDS frequency spectrum distortion
楼培德,王雨.基于DDS的谐波被抑制的直接数字调频信号失真分析[EB/OL].(2007-12-10)[2025-08-03].http://www.paper.edu.cn/releasepaper/content/200712-107.点此复制
评论