單項(xiàng)選擇題接入信道中，導(dǎo)頻信道的開(kāi)環(huán)輸出功率為mean pilot channel output power，數(shù)據(jù)信道的開(kāi)環(huán)輸出功率為meandatachanneloutputpower，則接入信導(dǎo)前綴中的導(dǎo)頻信道輸出功率為（）

A.mean pilot channel output power-mean data channel output power
B.mean pilot channel output power+mean data channel output power
C.mean pilot channel output power-0.5*mean data channel output power
D.mean pilot channel output power+0.5*mean data channel output power


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