公开(公告)号：US6081226A

公开(公告)日：2000-06-27

申请号：US113210

申请日：1998-07-10

申请人： Stephen P. Caldwell ,  Francis W. Hopwood ,  Thomas K. Lisle, Jr. ,  Wayne Weigle

发明人： Stephen P. Caldwell ,  Francis W. Hopwood ,  Thomas K. Lisle, Jr. ,  Wayne Weigle

IPC分类号： G01S7/282 ,  G01S7/288 ,  G01S13/02 ,  G01S13/10

CPC分类号： G01S13/106 ,  G01S7/282 ,  G01S7/288 ,  G01S2013/0272

摘要： A radar exciter including a direct digital synthesis (DDS) wideband waveform generator which performs the frequency synthesis function heretofore performed by a direct analog synthesizer. This is achieved by deriving the DDS frequencies, the exciter RF frequencies, the radar synchronizer clock frequency and receiver analog/digital (A/D) converter clock frequency from a common signal source generating a master frequency. The present invention eliminates the direct analog synthesizer and relies solely on the digital generation of waveforms by a DDS wideband waveform generator which performs a discrete sampling process so as to provide coherent frequency and timing relationships.

摘要翻译： 包括直接数字合成（DDS）宽带波形发生器的雷达激励器，其执行由直接模拟合成器执行的频率合成功能。 这是通过从产生主频率的公共信号源导出DDS频率，激励器RF频率，雷达同步器时钟频率和接收器模拟/数字（A / D）转换器时钟频率来实现的。 本发明消除了直接模拟合成器，并且仅依赖于执行离散采样处理以提供相干频率和时序关系的DDS宽带波形发生器的数字生成波形。