software defined radar project intro

1. VHF Pulse Compression Radar
Goals of the project:
Development of an experimental radar transceiver with asociated signal and data
processing for detecting unexpected occured, low-height operated, small reflectable,
flying targets, -using the existing antenna mechanics of type P-18 VHF radar.
Technical objectives:
Design and implementation of a state of the art equipment with sub-pulse modulated
transmitter, matched filter pulse compression receiver, full semiconductor based,
computer controlled, remote operable, ready for system integration.
60
Impulse Compression
0.5
Channel
64us pulse with 1us symbol
rate subpulse modulation is
transmitted, in the receiver it is
compressed back to 1us to
provide the required
resolution.
80
1
Pulse compression:
0
-0.5
-1
0
0.5
1
Time
40
20
0
-20
0
1.5
0.5
1
Time
x 10 -3
1.5
Installed type P-18 “Spoon Rest” VHF radar
x 1 0- 3
Implementation: using advanced software radio technology
Analog RF signal processing
High-speed domain conversion
Operating environment of the device:
Digital signal processing algorithms
Construction: 12U height 19” rack
PA’s power supply
PA
LNA
Booster
T/R switch
P-18
antenna
shelter
P-18
shelter
Rotation
control
Rotation signal
N U D
Rotation
interface
Direction
RS-232
Antenna connection
Transceiver
subsystem
RHP/ASOC
Signal and
data proc.
RS-232
IP
Display
subsystem
Signal- and data processing software:
Isolation transformer Platform
computer
PP indicator software:
Low-level signal
connections
IF and trigger
connections
Special thanks to:
Az eddig megvalósított
legteljesebb
radar fejlesztési projekt
www.sagax .
www.sagax.hu
Sagax, Ltd.
Sagax, Ltd.
Haller u. 11-13.
1096 Budapest, HUNGARY