A transmitter and a receiver of data frames and related methods are disclosed. The transmitter includes: a frame generator configured to generate a first frame comprising data to be transmitted; and a preamble inserter configured to insert a preamble into the first frame, wherein the preamble inserter is further configured to insert, in the preamble, emergency alert service (EAS) information related to a preset emergency alert event, and set an indicator in the frame to indicate whether the EAS information is inserted in the preamble. Accordingly, only important information related to the EAS is transmitted in the form of a preamble to achieve robust transmission, and L1 information of related data is directly transmitted to reduce power consumption.