The 5th Generation technology standard for cellular networks is characterized by the development of a new radio-access technology known as New Radio (NR). It exploits many of the structures and features of 4G Long Term Evolution (LTE), but a rethinking of already consolidated transmission techniques was needed to meet new requirements. This thesis studies the innovative synchronization methods for 5G. First of all, the 5G standard defines a new Synchronization Signal Block (SS-Block), i.e. a block consisting of two synchronization signals and one broadcast physical channel. To speed up the initial access process the NR is allowed to use from 8 to 64 synchronization blocks during a variable time interval (not necessarily each radio frame).