First, based on the characteristics of FCCH in GSM, analyzing the frequency spectrum and the correlation of SCH training sequence are two ways introduced to capture FCCH.
侦察的方法包括：对频率校正信道的侦察采用了直接频谱分析法和通过同步信道训练序列的相关计算方法；
First, based on the characteristics of FCCH in GSM, analyzing the frequency spectrum and the correlation of SCH training sequence are two ways introduced to capture FCCH.
侦察的方法包括：对频率校正信道的侦察采用了直接频谱分析法和通过同步信道训练序列的相关计算方法；
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