关键词：分布式光纤拉曼信号；经验模态分解；信噪比
摘 要：The distributed optical fiber Raman sensor system was widely used for real-time measurement temperature,but the Anti-Stokes and Stokes scattering Raman signal is very weak.In order to improve measurement accuracy the signal must be denoised before obtaining the temperature.In this paper,a new noise cancellation of empirical mode decomposition is proposed for enhancing signal-to-noise ration of the Anti-Stokes and Stokes scattering Raman signal.The signal-to-noise ratio was enhanced by using this method and it is easy to be realized in computer.