Patent ID: 7493135

Claim:
A transmission method for a downlink control signal in a MIMO communication system where multiple transmit antennas and multiple receive antennas are used, the method comprising: transmitting from each of the multiple transmit antennas with a different control signal through one downlink control signal transmit channel, wherein the control signal comprises information regarding a modulation method or the number of channel codes of each transmit antenna, the channel codes having an orthogonal characteristic, wherein the downlink control signal transmit channel is divided into sectors, each sector comprising a field to which bits for a modulation method of each transmit antenna are allocated and a field to which bits for a channel code are allocated, wherein if the number of the modulation methods is X, the number of bits corresponding to a minimum value among integers greater than or egual to a value of log 2 X is allocated as the control signal, and bits denoting a starting point and an ending point of a channel code tree to which a channel code is allocated are allocated as the bits for the channel code.