Page 18/62
Rev. A
2017-12-04
SCANTER 1002 Radar System
User’s Manual
1255194-HO
Fig. 3.3 Pulse compression principle
3.6
Power sector transmission
In order to avoid interference from strong echoes from large stationary targets like
buildings, mountains or ship superstructure and to reduce the risk of interfering with
other Ku-band systems, a power sector mode is available. This feature allows defi-
nition of up to 16 individual user defined sectors where the transmitted power can
be controlled. Each sector is defined as either:
The sectors are aligned relative to north.
Prohibit sectors take precedence over transmit sectors.
For the transmit sectors the power may be attenuated by up to 16 dB in each sec-
tor, thus providing a mode with low RF emission.
3.7
Environment adaptation
A false alarm is an erroneous radar target detection caused by clutter, noise or oth-
er interfering signals exceeding the detection threshold. In general, it is an indica-
tion of the presence of a radar target when there is no valid target.
Land suppressor adjusts the sensitivity to the stationary surroundings. Scan inte-
gration of SCD - Sea Clutter Discrimination - increases the suppression of clutter
and detection of slow-moving targets.
CFAR – Constant False Alarm Rate – and other adaptation techniques provide
automatic adjustments such as false alarm rate. CFAR provides a flat noise floor -
also based on proprietary algorithms.
Antenna
Transmitter
Receiver /
Processing
Power
Power
Antenna
Transmitter
Receiver /
Processing
Power
Power
Power
Power
A
B
A
B
Echo
Chirp with
frequency sweep
Equivalent
compressed power
•
Prohibit sector
•
Transmit sector
•
Reduced power sector
