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SAR数据处理 Perspectives on SAR Processing
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2013-01-23
22:41:40
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讲述了合成孔径雷达信号处理的细节和处理模式,给出了详细的举例。I Cumming是国际著名雷达信号处理专家,对雷达信号处理特别是高分辨率雷达信号处理有深入的研究。该PPT是合成孔径雷达入门的重要参考资料。
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Perspectives on SAR
Processing
Ian Cumming
Ian Cumming
Professor Emeritus
Professor Emeritus
Radar Remote Sensing Group
Radar Remote Sensing Group
Dept. of Electrical and Computer Engineering
Dept. of Electrical and Computer Engineering
University of British Columbia
University of British Columbia
Perspectives on SAR
Processing
1.
1.
Some SAR processing history
Some SAR processing history
2.
2.
Review of current SAR proc. algorithms
Review of current SAR proc. algorithms
3.
3.
Which algorithms are used today?
Which algorithms are used today?
4.
4.
Some image examples
Some image examples
5.
5.
Summary and final thoughts
Summary and final thoughts
Sept. 11, 2007
Sept. 11, 2007
2
2
Cumming – ASAR 2007
Cumming – ASAR 2007
Some Processing History
In 1976, SAR data were processed by coherent optics
In 1976, SAR data were processed by coherent optics
only one book available
only one book available
very hard to understand for a DSP engineer
very hard to understand for a DSP engineer
used laser beams and lenses to focus image
used laser beams and lenses to focus image
fast, but limited dynamic range
fast, but limited dynamic range
must be a better way – digital processing!
must be a better way – digital processing!
Challenge of digital processing
Challenge of digital processing
modest computing resources (memory & speed)
modest computing resources (memory & speed)
processing algorithms not known
processing algorithms not known
received signal model was needed (geometry)
received signal model was needed (geometry)
limited satellite orbit knowledge
limited satellite orbit knowledge
Sept. 11, 2007
Sept. 11, 2007
3
3
Cumming – ASAR 2007
Cumming – ASAR 2007
Early Airborne Processing
In 1970’s, CCRS obtained an airborne SAR from ERIM
In 1970’s, CCRS obtained an airborne SAR from ERIM
Installed on a Convair-580
Installed on a Convair-580
Previous processor was optical
Previous processor was optical
MDA contracted to built an on-board real-time processor
MDA contracted to built an on-board real-time processor
First RTP delivered in 1979 (additional units in 1985)
First RTP delivered in 1979 (additional units in 1985)
Sept. 11, 2007
Sept. 11, 2007
4
4
Cumming – ASAR 2007
Cumming – ASAR 2007
Early Airborne Processing
Processor characteristics
Processor characteristics
time-domain correlation
time-domain correlation
X-band, no RCMC needed
X-band, no RCMC needed
built from discrete
built from discrete
components
components
multiplier-accumulator
multiplier-accumulator
chips, small memory
chips, small memory
chips
chips
4 giga ops per second in
4 giga ops per second in
one chassis
one chassis
performed azimuth
performed azimuth
compression first, then
compression first, then
range compression
range compression
real-time waterfall display
real-time waterfall display
on-board
on-board
Sept. 11, 2007
Sept. 11, 2007
5
5
Cumming – ASAR 2007
Cumming – ASAR 2007
On-board real-time processor
On-board real-time processor
on CCRS Convair-580
on CCRS Convair-580
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- jsyzgycj2014-05-21没有什么实质性的东西,不值这个分数
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