Patent ID: 9225414
Filing Date: 2015-12-29
Classification: H01Q,H04B,H04W

Abstract:
1. A transmission method for a wireless communication system, the method comprising: grouping pilot subcarriers into a first pilot subcarrier group and a second pilot subcarrier group; generating a first Orthogonal Frequency Division Multiplexing(OFDM) symbol carrying at least one pilot symbol on the first pilot subcarrier group and no pilot symbol on the second pilot subcarrier group; generating a second OFDM symbol carrying at least one pilot symbol on the second pilot subcarrier group and no pilot symbol on the first pilot subcarrier group; and transmitting the first OFDM symbol and the second OFDM symbol simultaneously via different antennas, wherein a first antenna combination used for transmitting the first and the second OFDM symbols in a first interval and a second antenna combination used for transmitting the first and the second OFDM symbols in a second interval are different than each other, wherein the number of antennas is greater than the number of pilot subcarrier groups, wherein the first pilot subcarrier group and the second pilot subcarrier group are mapped to the different antennas which are selected among transmission antennas for each interval, wherein the second antenna combination in the second interval includes at least one antenna which is selected from the first antenna combination and at least one antenna which is not selected from the first antenna combination, and wherein the second antenna combination in the second interval includes at least one antenna by which an OFDM symbol is not transmitted in the first interval.