摘要
随着SAR信号处理技术的数字化,开发基带数字信号源对于满足SAR向多分辨率、多模式的发展具有重要的意义。本文提出了一种基于DDWS技术的多功能数字基带信号源的设计方案,该信号源以单片FPGA作为控制核心,具有结构简单、灵活性好、通用性强等优点,并讨论了该信号源的主要误差来源及主要参数对信号质量的影响,对信号源的工程实现提供一定的参考。基于该技术的数字基带信号源已成功应用到某高分辨率合成孔径雷达系统中。
With the digitization of SAR signal processing technique, developing a base-band digital signal source plays an important role in satisfying the development of multi-resolution and multi-mode of SAR system. This paper presents the design of one multifunctional digital base-band signal source based on DDWS technique and using one FPGA chip as the control-unit. The signal source has much advantage such as easier structure, good flexibility and adapting to many purposes. This paper discusses the error resource of this signal source and analyses the major parameters affecting the waveform. The method gives some suggestions to the engineering realization of signal sources. The digital base-band signal source based on the technique has been successfully applied in some high-resolution Synthetic Aperture Radar （SAR） system.
出处
《电子测量技术》
2008年第8期20-23,共4页
Electronic Measurement Technology
关键词
DDWS
线性调频信号
数字基带信号源
合成孔径雷达(SAR)
DDWS
linear frequency
modulated（LFM） signal
digital base-band signal source
synthetic aperture radar （SAR）
