Patent ID: 8707120

Claim:
A method of transmitting an acknowledgment (ACK)/non-acknowledgement (NACK) signal in a wireless communication system, the method comprising: assigning at least one ACK channel amongst a plurality of ACK channels which share an ACK channel region for transmitting the ACK/NACK signal; and transmitting the ACK/NACK signal through one of the at least one ACK channel, wherein each of the at least one ACK channel comprises repeated tiles, wherein each of the repeated tiles is arranged with a plurality of symbols in a time domain and a plurality of subcarriers in a frequency domain, and comprises a continuous sequence of data subcarriers that does not include pilot subcarriers, wherein the ACK/NACK signal is assigned an orthogonal code having a length proportional to a number of data subcarriers in the continuous sequence of data subcarriers.