diff --git a/mapping.m b/mapping.m
index f8266c7..dc38618 100644
--- a/mapping.m
+++ b/mapping.m
@@ -1,3 +1,10 @@
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% Code file provided from ECE 257B SP2018                                 %
+% Instructor:  Dinesh Bharadia, Manu Seth                                 %
+%              Department of Electrical and Computer Engineering,         %
+%              University in San Diego, California, USA                   %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
 function [map_out]=mapping(data,mode,scale)
 
 % mode : Modulation order in power of 2 (1/2/4/6 = BSPK/QPSK/16-QAM/64-QAM)
@@ -31,5 +38,4 @@ for i=1:(ceil(length(input_seq)/mode))
         end
     end
     map_out(i)=b(temp+1);
-end
-
+end
\ No newline at end of file