摘要 :
High-frequency(HF) skywave over-the-horizon
radar(OTHR) looks down its targets from the ionosphere, it
has a large operating range and a large cover areas, but it
received a large-amplitude backscatterer echo form the
terrain...
展开
High-frequency(HF) skywave over-the-horizon
radar(OTHR) looks down its targets from the ionosphere, it
has a large operating range and a large cover areas, but it
received a large-amplitude backscatterer echo form the
terrain and sea, and strong interference, such as, radio
frequency interference, industrial interference, impulsive
noise, lightning impulsive, meteor trail echoes and so on.
Interference can be divided into long time interference and
transient interference, transient interference lasts a short
time, but its intensity is great. This paper first discusses the
character of transient interference, and uses eigen-
decomposition to separate the sea clutter subspace and
filter it, or filters terrestrial clutter in frequency domain and
back to time domain, then the transient interference is
detected, after that the transient interference are excised
from the original echoes, finally, the excised clutter and
target echoes are predicted by Burg linear prediction
algorithm. This processing method has been successfully
applied to the real data from China experimental OTHR.
收起
摘要 :
High-frequency(HF) skywave over-the-horizon
radar(OTHR) looks down its targets from the ionosphere, it
has a large operating range and a large cover areas, but it
received a large-amplitude backscatterer echo form the
terrain...
展开
High-frequency(HF) skywave over-the-horizon
radar(OTHR) looks down its targets from the ionosphere, it
has a large operating range and a large cover areas, but it
received a large-amplitude backscatterer echo form the
terrain and sea, and strong interference, such as, radio
frequency interference, industrial interference, impulsive
noise, lightning impulsive, meteor trail echoes and so on.
Interference can be divided into long time interference and
transient interference, transient interference lasts a short
time, but its intensity is great. This paper first discusses the
character of transient interference, and uses eigen-
decomposition to separate the sea clutter subspace and
filter it, or filters terrestrial clutter in frequency domain and
back to time domain, then the transient interference is
detected, after that the transient interference are excised
from the original echoes, finally, the excised clutter and
target echoes are predicted by Burg linear prediction
algorithm. This processing method has been successfully
applied to the real data from China experimental OTHR.
收起
摘要 :
High-frequency(HF) skywave over-the-horizon
radar(OTHR) looks down its targets from the ionosphere, it
has a large operating range and a large cover areas, but it
received a large-amplitude backscatterer echo form the
terrain...
展开
High-frequency(HF) skywave over-the-horizon
radar(OTHR) looks down its targets from the ionosphere, it
has a large operating range and a large cover areas, but it
received a large-amplitude backscatterer echo form the
terrain and sea, and strong interference, such as, radio
frequency interference, industrial interference, impulsive
noise, lightning impulsive, meteor trail echoes and so on.
Interference can be divided into long time interference and
transient interference, transient interference lasts a short
time, but its intensity is great. This paper first discusses the
character of transient interference, and uses eigen-
decomposition to separate the sea clutter subspace and
filter it, or filters terrestrial clutter in frequency domain and
back to time domain, then the transient interference is
detected, after that the transient interference are excised
from the original echoes, finally, the excised clutter and
target echoes are predicted by Burg linear prediction
algorithm. This processing method has been successfully
applied to the real data from China experimental OTHR.
收起
