diff --git a/signal_denoising.m b/signal_denoising.m
index e207ba6..2b960a4 100644
--- a/signal_denoising.m
+++ b/signal_denoising.m
@@ -1,3 +1,8 @@
+%-----------------------------%%-----------------------------%%
+%  Authors: Alessandra Galli, Claudio Narduzzi, Giada Giorgi. %
+%        Instrumentation and Measurement Research Group       %
+%                    University of Padova                     %
+%-----------------------------%%-----------------------------%%
 function [ xr_1,xr_2 ] = signal_denoising(ppg1,ppg2,accx,accy,accz)
  %% Construction of Hankel matrices and SVD
     H1=Hk(ppg1);