| 摘要 |
PROBLEM TO BE SOLVED: To provide the transmission power control method for a CDMA signal where an excess input to an orthogonal modulation section is prevented to eliminate distortion in a radio signal, thereby obtaining an excellent characteristic, and no interference is caused even in the case of multiplex transmission of plurality of codes by applying transfer power control to each code. SOLUTION: In the transmission power controller, I phase spread and Q phase spread signals in transmission data for each channel are synthesized, a total power detection section 12 detects total power from the synthesized I phase and Q phase spread signals, a transmission power control section 11 updates a weight coefficient α based on the detected total power, multiplies a ratio T/α of a transmission power control variable received from a pre-stage to the weight coefficient α with the spread signals at their synthesis as a gain adjustment value that is a new transmission power control variable, the respective synthesized spread signals including the result of multiplication are orthogonally modulated, the signal that is orthogonally modulated is amplified at a gain proportional to the weight coefficient αand the amplified signal is transmitted. |
