| 摘要 |
PURPOSE:To easily, surely and economically realize, the AFC following up a base station in a mobile communication terminal. CONSTITUTION:Two types of pilot signals with the frequency F1 and F2 sent as ¦F1-F2¦ = channel interval frequency X N from the base station are received by the mobile communication terminal. A PLL synthesizer reference signal generation section 2-4 obtains the difference frequency ¦F1-F2¦ by the frequency conversion from the pilot signal separated and extracted in the respective frequency F1 and F2. By frequency dividing by N, the frequency corresponding to the channel interval frequency can be easily, surely, and economically obtained as the reference signal to a PLL synthesizer 2-5. |
