文档介绍：国防科学技术大学
博士学位论文
多载频相位编码雷达信号设计与处理技术研究
姓名:邓斌
申请学位级别:博士
专业:信息与通信工程
指导教师:黎湘
2011-05
国防科学技术大学研究生院博士学位论文
Abstract
It is of pressing military demands and practical signality to research utilizing single
form of signal to realize new type wideband radar with multiple functions. The
dissertation focuses on the research of signal designing and processing of multi-carrier
phase coded (MCPC) radar. Three main subjects are addressed in this dissertation,
which are designing of multi-carrier radar signal, pression and target detection
as well as parameter estimation and imaging of moving target.
The derivation and category of multi-carrier radar signal is firstly addressed whose
envelope and ambiguity function (AF) are two main characteristics. Based on the
flexibility feature of MCPC, the impact of different sub-carrier weighting on signal
envelope is analyzed. And the full expression of AF is deduced to research the
relationship between auto cross function and signal parameters, which provides
theoretical basis for signal designing.
For the parameter designing and optimization of multi-carrier radar signal, based
on the rule of AF, the OFDM signal with relatively less parameters is firstly designed to
achieve very low sidelobes in ACF, which is suitable to target detection. Secondly,
considering the high sidelobes in AF of MCPC and the drawback of current designing
method, a random shifted phase-coded MCPC is proposed. Its envelope is efficiently
lowered by time-frequency clipping iteration which leads to satisfied ambiguity diagram
and envelope fluctuation at the same time. This method is able to expediently produce
waveform-diverse pulse train with ideal AF and low recurrent sidelobes in ACF. Finally
the multi-carrier radar system performance is analyzed to instruct the designing of
transmitting waveform and designing samples towards specific mission are given.
For putational efficiency and full usage of multi-