Patent ID: 8432862
Filing Date: 2013-04-30
Classification: H04L

Abstract:
1. A method of transmitting and receiving data in a wireless access system, the method comprising: transmitting data using a resource block constructed taking into consideration channel estimation capabilities and data transfer rate; and receiving data using the resource block, wherein the resource block has a 6×6 structure constructed with 6 OFDM symbols (symbol indices of 0 to 5) and 6 subcarriers (subcarrier indices of 0 to 5), and wherein one or more pilot symbols are allocated to prescribed OFDM symbols of a subcarrier index 1 and a subcarrier index 4 of the resource block, and first pilots and second pilots are allocated to the resource block at a predetermined allocation rate taking into consideration a number of transmit antennas, and wherein one of the first pilots is allocated at the subcarrier index 1 and an OFDM symbol index 0, and wherein one of the second pilots is allocated at the subcarrier index 4 and an OFDM symbol index 1, and wherein the first pilots and the second pilots are allocated alternately at an interval of 1 OFDM symbol on the subcarrier indices 1 and 4, wherein, for boosting power of the first pilots and the second pilots respectively, power is borrowed from at least one data symbol included in each OFDM symbol to which the first pilots and the second pilots are allocated.