摘要
本文介绍了采用DDS芯片产生宽带线性调频信号,以及通过正交调制将基带线性调频信号变换为单边带线性调频信号的系统设计方案。按此方案成功实现了宽带线性调频信号发生器系统。实验表明,该系统灵活、可靠,输出信号有很好的频率线性度。
The design and implementation of wideband LFM waveforms generator by DDS chip is descried in this paper. The project of transforming the base band LFM waveforms to single sideband LFM waveforms by quadrature modulated technique is also introduced. The system is flexible and reliable. It is proved that the output signal has good frequency linearity.
出处
《电子测量技术》
2006年第3期133-133,150,共2页
Electronic Measurement Technology
关键词
线性调频
直接数字合成
正交调制
LFM
direct digital synthesis
quadrature modulated
