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基于DDS的高码速率遥感卫星模拟信号频综源设计与实现
引用本文:杨蕾,林波涛.基于DDS的高码速率遥感卫星模拟信号频综源设计与实现[J].电子器件,2009,32(6):1080-1083.
作者姓名:杨蕾  林波涛
作者单位:中国人民解放军,91039部队,北京102401
摘    要:研究将新型直接频率合成器DDS应用于遥感卫星模拟信号源.介绍了DDS的关键技术和DDS原理;采用新型器件设计实现了一种基于FPGA+DDS架构的高码速率卫星信号频综源,有效抑制了谐波杂散和噪声,具有48bit频率调整字(FTW),能以每步间隔不大于4 μHz合成频率;给出了信号实测波形;该系统具有频率分辨率高、码速率高、频带宽(0.01~400 MHz)、切换速度快等优点.

关 键 词:频综源

Research and Implementation of High Speed remote sensing satellites simulator Signal Source Based on FPGA and DDS Devices
YANG Lei.Research and Implementation of High Speed remote sensing satellites simulator Signal Source Based on FPGA and DDS Devices[J].Journal of Electron Devices,2009,32(6):1080-1083.
Authors:YANG Lei
Affiliation:YANG Lei*Chinese PLA 91039,Beijing 102401,China
Abstract:A new kind of direct digital synthesizer device is applied in the system of remote sensing satellites simulator signal source. Key technologies and principle of DDS are introduced; The high speed signal source based on FPGA and new DDS devices, which can restrain harmonic spurious effectively; The signal source can provide precise and wide range of frequency, which is synthesized by frequency tuning word (FTW) in step sizes no larger than 4 uHz; And finally, some actually signal waves are been shown ,which were probed on the output pins of AD9912.
Keywords:DDS  AD9912  FPGA
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