Apparatus and method for supporting time-quadrature amplitude modulation in a wireless communication system

An apparatus for a transmit end in a wireless communication system, the apparatus comprising:

• a modem configured to generate a transmission symbol identified by a combination of a Quadrature Amplitude Modulation (QAM) symbol and a position of a time resource to which the QAM symbol is mapped, shift at least one QAM symbol among QAM symbols contained in the transmission symbols with respect to a time axis, and readjust a constellation point of the QAM symbol on the basis of a shifting quantity;
• and
• a Radio Frequency (RF) transmission unit configured to transmitting the transmission symbol.

An apparatus for a receive end in a wireless communication system, the apparatus comprising:

• a reception unit configured to receive a reception symbol identified by a combination of a Quadrature Amplitude Modulation (QAM) symbol and a position of a time resource to which the QAM symbol is mapped;
• and
• a modem configured to restore at least one QAM symbol shifted in a transmit end for uniformizing of the time-axis distribution of QAM symbols contained in the reception symbols, generating decoding metrics for the reception symbol, and performing decoding the reception symbol using the decoding metric.