| 摘要 |
PURPOSE: A device for acquiring a code of a CDMA system is provided to simultaneously use a noncoherent accumulation value and an accumulation adaptive threshold value, and to perform a code acquisition process, thereby increasing a probability of acquiring PN code synchronization. CONSTITUTION: A receiver(100) receives an RF signal, and generates an I signal and a Q signal of a baseband. A noncoherent accumulation correlation value calculator(200) receives the I and the Q signals, and outputs a noncoherent accumulation correlation value of a PN(Pseudo Noise) code. An accumulation adaptive threshold value calculator(300) receives the I and the Q signals, and calculates an accumulation adaptive threshold value. A comparator(400) compares the accumulation correlation value with the accumulation threshold value, and decides whether to acquire a code. |
