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Improvement of signal-to-noise ratio in chaotic laser radar based on algorithm implementation
Authors:Bingjie Wang  Tong Zhao  and Huakui Wang
Institution:1College of Physics and Optoelectronic Engineering,Taiyuan University of Technology,Taiyuan 030024,China 2 College of Information Engineering,Taiyuan University of Technology,Taiyuan 030024,China
Abstract:Chaotic laser radar based on correlation detection is a high-resolution measurement tool for remotely monitoring targets or objects.However,its effective range is often limited by the side-lobe noise of correlation trace,which is always increased by the randomness of the chaotic signal itself and other transmission channel noises or interferences.The experimental result indicates that the wavelet denoising method can recover the real chaotic lidar signal in strong period noise disturbance,and a signal-to-noise ratio of about 8 dB is increased.Moreover,the correlation average discrete-component elimination algorithm significantly suppresses the side-lobe noise of the correlation trace when 20 dB of chaotic noise is embedded into the chaotic probe signal.Both methods have advantages and disadvantages.
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