Patent ID: 7983330

Claim:
A method for transmitting uplink acknowledgments in response to downlink transmissions, the method comprising: receiving, in a User Equipment (UE), a plurality of data blocks from a Node B, wherein each of the data blocks include an associated cyclic redundancy check (CRC); determining received status for each of the data blocks by checking the CRC of each of the data blocks; generating a response sequence which indicates the received status of all of the received plurality of data blocks; modulating the response sequence using QPSK modulation; and transmitting, from the UE, the modulated response sequence to the Node B, wherein the data blocks comprise a first transport block and a second transport block, wherein the received status is either an acknowledgment (ACK) which identifies a data block which has been received without error, or a negative acknowledgment (NACK) which identifies a data block which has been received with an error.