Abstract
The transmission of long-wave signal in lightning is easily weakened to a very low amplitude, and affected by non-stationary time-varying strong noise, which makes the detection signal become extremely difficult, and it is difficult to achieve the extraction of useful information. As the main noise source of interference long wave signal, this paper studies the chaos detection method of lightning noise, proposes the detection method of long wave signal based on the limit threshold chaotic oscillator, combines the Euler equation, the main frequency ratio phase change discrimination algorithm and other technologies, based on the non-linear signal processing technology, completes the chaos detection of long wave weak signal by simulating the noise environment in the laboratory, its reliability is verified by theoretical experiments, which can provide an important basis for the development of long-wave reception technology.
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