Hi Ramendra;
There is absolutely no problem between PB's UTF-16 encoding and SA's UTF-8 encoding as one is a two byte system vs 4 byte encoding system. The DB client drivers will automatically convert back & forth between the two scheme's since PB v10.x.
The big issue resolves around Unicode extended character set where you need to use the NChar or NVarChar data types in your DB table's column data type to house these special characters. Once the proper data type is set in the DB schema, PB & its DW objects will align their SQL character support accordingly.
HTH
Regards ... Chris