航空航天港

 找回密码
 注册会员

QQ登录

只需一步,快速开始

返回列表
查看: 4977|回复: 4
收起左侧

[单篇] [pdf]机载双基雷达的信号处理

[复制链接]
Lsquirrel 发表于 2011-2-8 14:44 | 显示全部楼层 |阅读模式
名称:Signal Processing for Airborne Bistatic Radar
作者:Kian Pin Ong
A thesis submitted for the degree of Doctor of Philosophy.
The University of Edinburgh.
- June 2003 -

简介:
The major problem encountered by an airborne bistatic radar is the suppression of bistatic
clutter. Unlike clutter echoes for a sidelooking airborne monostatic radar, bistatic clutter echoes
are range dependent. Using training data from nearby range gates will result in widening of the
clutter notch of STAP (space-time adaptive processing) processor. This will cause target returns
from slow relative velocity aircraft to be suppressed or even go undetected. Some means of
Doppler compensation for mitigating the clutter range dependency must be carried out.
This thesis investigates the nature of the clutter echoes with different radar configurations. A
novel Doppler compensation method using Doppler interpolation in the angle-Doppler domain
and power correction for a JDL (joint domain localized) processor is proposed. Performing
Doppler compensation in the Doppler domain, allows several different Doppler compensations
to be carried out at the same time, using separate Doppler bins compensation. When using
a JDL processor, a 2-D Fourier transformation is required to transform space-time domain
training data into angular-Doppler domain. Performing Doppler compensation in the spacetime
domain requires Fourier transformations of the Doppler compensated training data to be
carried out for every training range gate. The whole process is then repeated for every range
gate under test. On the other hand, Fourier transformations of the training data are required
only once for all range gates under test, when using Doppler interpolation. Before carrying out
any Doppler compensation, the peak clutter Doppler frequency difference between the training
range gate and the range gate under test, needs to be determined. A novel way of calculating the
Doppler frequency difference that is robust to error in pre-known parameters is also proposed.
Reducing the computational cost of the STAP processor has always been the desire of any
reduced dimension processors such as the JDL processor. Two methods of further reducing
the computational cost of the JDL processor are proposed. A tuned DFT algorithm allow the
size of the clutter sample covariance matrix of the JDL processor to be reduced by a factor
proportional to the number of array elements, without losses in processor performance. Using
alternate Doppler bins selection allows computational cost reduction, but with performance
loss outside the clutter notch region. Different systems parameters are also used to evaluate the
performance of the Doppler interpolation process and the JDL processor. Both clutter range
and Doppler ambiguity exist in radar systems operating in medium pulse repetitive frequency
mode. When suppressing range ambiguous clutter echoes, performing Doppler compensation
for the clutter echoes arriving from the nearest ambiguous range alone, appear to be sufficient.
Clutter sample covariance matrix is estimated using training data from the range or time or
both dimension. Investigations on the number of range and time training data required for the
estimation process in both space-time and angular-Doppler domain are carried out. Due to
error in the Doppler compensation process, a method of using the minimum amount of range
training data is proposed. The number of training data required for different clutter sample
covariance matrix sizes is also evaluated. For Doppler interpolation and power correction JDL
processor, the number of Doppler bins used can be increased, to reduce the amount of training
data required, while maintaining certain desirable processor performance characteristics.

I hereby declare that the research recorded in this thesis and the thesis itself was composed and
originated entirely by myself in the School of Engineering and Electronics at the University of
Edinburgh, except Figure 1.5 and Figure 4.17.


说明:
一篇爱丁堡大学的博士论文,正文125页,多基雷达理论方面应该有些参考价值吧

本帖子中包含更多资源

您需要 登录 才可以下载或查看,没有帐号?注册会员

x

评分

参与人数 1积分 +5 火箭 +2 收起 理由
祖国之翼 + 5 + 2 奖励

查看全部评分

罗严塔尔 发表于 2011-2-8 16:09 | 显示全部楼层
多谢了

手头上的资料都是地面双/多基雷达的

机载的和舰载的没有一篇
lhb0078 发表于 2011-2-8 17:11 | 显示全部楼层
好东西,可惜没有飞币了,下载不了
tigeroptics 发表于 2011-10-23 14:09 | 显示全部楼层
谢谢,先下载学习了
jiafeimao99 发表于 2012-7-21 08:32 | 显示全部楼层
谢谢分享
您需要登录后才可以回帖 登录 | 注册会员

本版积分规则

QQ|申请友链|旗下论坛|小黑屋|手机版|航空航天港 ( 豫ICP备12024513号 )

GMT+8, 2017-11-20 13:49 , Processed in 0.330671 second(s), 35 queries , Gzip On.

Powered by Discuz! X3.2

© 2001-2013 Comsenz Inc.

快速回复 返回顶部 返回列表