另一种方法是对公共载波调频或调相的方法发送并列信道的组合数字信号。

An alternative method is to transmit the combined digital signal from the parallel channels by frequency or phase modulation of common carrier.

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由于公共导频信道无功率控制，有可能在接收端接收到的公共导频信号的功率很低，使得信道估计的误差变大。

Because there is no power control in CPICH, the received common pilot signal power is possibly very low if the mobile is far from the base station, and this time the channel estimates is inaccurate.

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