Optimized cross-correlation method for Brillouin frequency shift estimation in Brillouin scattering-based sensors.The cross-correlation method has a low computational burden and is less sensitive to noise, but the method may have a long spectra measurement time, especially for Brillouin spectra with an asymmetric frequency sweep span.  An estimation formula for the optimal sweep span is presented, and an improved cross-correlation method is proposed based on it.  The proposed method is compared with existing classic cross-correlation methods. 
cross-correlation method
Optimized cross-correlation method for Brillouin frequency shift estimation in Brillouin scattering-based sensors.The cross-correlation method has a low computational burden and is less sensitive to noise, but the method may have a long spectra measurement time, especially for Brillouin spectra with an asymmetric frequency sweep span. 
Brillouin scattering-based sensors