Patent ID: 7307943

Claim:
In an IQ multiplexing device configured to IQ multiplex transmission data for a data channel and control data for a control channel, and to generate a complex signal, the improvement comprising: when control data for an additional control channel are added, the IQ multiplexing device is further configured to assign the control data to be added to the Q axis when a set number for the data channel is an odd number and to the I axis when the set number for the data channel is an even number, wherein the IQ multiplexing device is further configured to assign the transmission data for the data channel to the I axis and the Q axis alternately and to assign the transmission data for the data channel to the I axis at first, wherein the IQ multiplexing device includes a spread spectrum generator configured to perform a spread spectrum operation on the data of each channel prior to IQ multiplexing, and a scrambler configured to scramble the data of each channel after IQ multiplexing, wherein the scrambler comprises: a multiplier configured to multiply data for the data channel by a first amplitude coefficient; a multiplier configured to multiply control data for the control channel by a second amplitude coefficient; and a multiplier configured to multiply data for a control channel for high speed downlink packet data by a third amplitude coefficient.