TRANSMITTING APPARATUS AND RECEIVING APPARATUS AND CONTROLLING METHOD THEREOF

摘要

A transmitting apparatus is provided. The transmitting apparatus includes: a frame generator configured to generate a frame including a plurality of orthogonal frequency-division multiplexing (OFDM) symbols; and a guard interval (GI) inserter configured to insert GIs into the generated frame, wherein the plurality of OFDM symbols are divided into a bootstrap, a preamble, and a payload, and the GI inserter inserts first GIs having a size corresponding to a fast Fourier transform (FFT) size of each of OFDM symbols configuring the payload into front ends of each of the OFDM symbols, inserts second GIs having a size corresponding to a quotient obtained by dividing an extra region of the payload calculated based on the FFT size of the OFDM symbols configuring the payload, the number of OFDM symbols, and the size of the first GIs by the number of OFDM symbols into front ends of each of the first GIs, and inserts a cyclic postfix (CP) having a size corresponding to the remainder remaining after dividing the extra region of the payload by the number of OFDM symbols into a rear end of a final OFDM symbol configuring the payload.

主权项

1. A controlling method of a transmitting apparatus, the controlling method comprising:
generating a frame comprising a plurality of orthogonal frequency-division multiplexing (OFDM) symbols; and inserting one or more guard intervals (GIs) into the frame based on an extra part of the generated frame, wherein the frame comprises a bootstrap, a preamble and a payload, wherein the extra part of the frame is obtained based on a fast Fourier transform (FFT) size of each of the OFDM symbols of the payload, a number of the OFDM symbols of the payload, and a size of a first GI, and wherein the inserting comprises: inserting the first GI including a size corresponding to an FFT size of an OFDM symbol of the payload into a front end of the OFDM symbol of the payload; and inserting a second GI including a size corresponding to a quotient into a front end of the first GI, the quotient being obtained by dividing the extra part of the frame by the number of the OFDM symbols of the payload.