Utilizing Adaptive Techniques to Supress Noise In High Frequency Ground Wave Radar

Reducing noise disturbances in the frequency segment of high frequency (HF) ground wave radar and restraining the sidelobes of strong targets that interfere with the detection of weak targets are the interesting Topic. A new method based on an adaptive techniques that solves these problems is proposed. By changing the working time of the frequency spectrum monitor (FSM), we have shown not only that radar can run in the frequency segments with lower noise disturbances, but also that the noise data produced by FSM can be exploited effectively. There is no correlation between the noise and the useful echo signal, though the correlation between noises over very short time periods is strong, . Exploiting the phenomena, we can adjust system parameters in real-time by adaptive methods to solve the two problems, namely sidelobe disturbance of strong targets and noise distrubance in the frequency segment.