Patent ID: 9048992
Filing Date: 2015-06-02
Classification: H04B,H04J,H04L

Abstract:
1. A method for communicating Acknowledgement/Negative acknowledgement (ACK/NACK) information in a mobile communication system, the method comprising: spreading, by a base station, first ACK/NACK information using an orthogonal sequence with a spreading factor of 2; spreading, by the base station, second ACK/NACK information using an orthogonal sequence with the spreading factor of 2; transmitting, by the base station, the first and second spread ACK/NACK information via multiple antennas; and receiving, by a terminal, the first and second spread ACK/NACK information, wherein the first and second spread ACK/NACK information is coded on four available neighboring subcarriers of the multiple antennas in a form of Table 1 or 2: wherein antennas A and B represent two antennas in the multiple antennas, wherein antennas C and D represent two antennas in the multiple antennas, wherein a wherein the “*” symbol represents a conjugate operation.