Patent ID: 8009720

Claim:
A method for transmitting a spread signal in a mobile communication system, the method comprising: spreading a first signal using a plurality of spreading codes, wherein the plurality of spreading codes have a spreading factor; multiplexing the first spread signal by code division multiplexing; transmitting the first multiplexed signal via a plurality of neighboring frequency resources of an OFDM symbol of a first antenna set; spreading a second signal using a plurality of spreading codes, wherein the plurality of spreading codes have a spreading factor; multiplexing the second spread signal by code division multiplexing; transmitting the second multiplexed signal via a plurality of neighboring frequency resources of the OFDM symbol of the first antenna set; transmitting a third multiplexed signal via a plurality of neighboring frequency resources of an OFDM symbol of a second antenna set, wherein the third multiplexed signal carries the same information as the first multiplexed signal; and transmitting a fourth multiplexed signal via a plurality of neighboring frequency resources of the OFDM symbol of the second antenna set, wherein the fourth multiplexed signal carreis the same information as the second multiplexed signal, wherein the first multiplexed signal is transmitted on frequency resources that neighbor frequency resources that the second multiplexed signal is transmitted on, and the third multiplexed signal is transmitted on frequency resources that neighbor frequency resources that the fourth multiplexed signal is transmitted on.