Patent ID: 7995553
Filing Date: 2011-08-09
Classification: H04L,H04W

Abstract:
1. A method of transmitting ACK/NACK signals, the method comprising: repeating each of the ACK/NACK signals by N times, wherein N is a predetermined natural number greater than 1; multiplexing i-th bits, each of the i-th bits being from the repeated ACK/NACK signals respectively, within an i-th time-frequency domain by a Code Division Multiple Access (CDMA) scheme, wherein i=1, 2, . . . , N, and the i-th time-frequency domains, each of which is for i=1, 2, . . . , N, respectively, are different from each other; and transmitting the multiplexed ACK/NACK signals, wherein the ACK/NACK signals are discriminated by orthogonal or pseudo-orthogonal codes used for multiplexing of each of the ACK/NACK signals.