Progress in HFSWR Research at Harbin Institute of Technology
HARBIN INST OF TECH (CHINA)
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The Experimental HF Surface Over-the-Horizon Radar set up in the late 1980s has been updated by the following attributes 1 installation of multi-channel receivers with digitization at the second IF stage, 2 newly designed transmitting and receiving antennas, 3 wideband solid-state power amplifiers, 4 frequency synthesizer with low phase noise and flexible signal generator, 5 a new radar controller added to allow the automatic and manual control of the radar, 6 a newly designed signal and data processor built mainly with 16 bits AD converters and several multiprocessor boards with Share chip processors added in, and 7 an electromagnetic spectrum monitor equipped in the updated radar system to be able to automatically survey HF spectrum occupancy for providing so-called clear frequency channel suitable for radar operation. The purpose of setting up the updated radar system is to demonstrate some of the new functions of the radar system, and to prove some new techniques to be possibly used in the near future. In the paper, some of the latest developments of countering measures with radio frequency interferences are also presented.
- Active and Passive Radar Detection and Equipment