Patent ID: 7782810
Filing Date: 2010-08-24
Classification: H04L,H04W

Abstract:
1. An apparatus for transmitting a OFDM symbol in a mobile communication system for broadcasting service, the apparatus comprising: a transmission processor for generating a modulated symbol by encoding, interleaving and modulating a physical layer packet to be transmitted, and arranging the modulated symbol in data tones of the OFDM symbol; a tone inserter for inserting guard tones and pilot tones into the OFDM symbol; a tone power allocator for setting a different pilot-to-data tone power ratio according to a position of the OFDM symbol in a slot, and allocating power according to the pilot-to-data tone power ratio; and a transmitter for transmitting the OFDM symbol; wherein the tone power allocator allocates power to the pilot tone and the data tone according to a first pilot-to-data tone power ratio if the OFDM symbol is located in an outer side of the slot, and allocates power to the pilot tone and the data tone according to a second pilot-to-data tone power ratio if the OFDM symbol is located in an inner side of the slot.