Design and implementation of wideband digital chirp pulse generator for fine resolution SAR image = 고해상도 합성 개구 레이다 영상을 위한 광대역 디지털 첩 펄스 발생기 설계 및 구현

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Wideband chirp pulse generation technology is the prerequisite of various imaging radars and target identification algorithms. The waveform generated by digital systems is much better repetition and coherency. Nevertheless, there still exist some difficulties to directly generate pulse signals with absolute large bandwidth by digital technology because the speed of current digital devices is limited. In this thesis, we present the simulation results of image with various bandwidth of chirp pulse and design two kind of digital chirp pulse generator called AWG and DDS technology. The bandwidth of AWG chirp pulse generator is 300MHz to 500MHz in digital chain. The linear FM waveform values also are generated for the sine look up table. Second one is DDS chirp pulse generator. We designed and implemented 300MHz wideband DDS chirp pulse generator. If we use analog technologies such as orthogonal modulator or double frequency chain circuits, the bandwidth of chirp pulse is extended 600MHz to 1000MHz. Implemented wideband digital chirp pulse generator can be used for the fine resolution imaging SAR system. It is possible to make 25cm to 50cm range resolution image.
Advisors
Lim, Jong-Taeresearcher임종태researcher
Description
한국과학기술원 : 전기및전자공학전공,
Publisher
한국과학기술원
Issue Date
2006
Identifier
255559/325007  / 020043914
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 전기및전자공학전공, 2006.2, [ vii, 47 p. ]

Keywords

Chirp Pulse; Wideband; 첩펄스; 광대역

URI
http://hdl.handle.net/10203/38390
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=255559&flag=dissertation
Appears in Collection
EE-Theses_Master(석사논문)
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