公开(公告)号：US06813262B1

公开(公告)日：2004-11-02

申请号：US09633035

申请日：2000-08-04

Applicant: Woo Jae Lee ,  Cheon Soo Yoon

Inventor： Woo Jae Lee ,  Cheon Soo Yoon

IPC: H04B716

CPC classification number: H04B1/70757 ,  H04B1/708

Abstract: A synchronization tracking device and method in a code division multiple access (CDMA) receiver including oversampling received signals corresponding to a plurality of chips at a predetermined speed and sequentially storing the oversampled signals in a received signal shift register unit; sequentially storing pseudo noise codes generated in a pseudo noise code generator in a pseudo noise code shift register unit in a chip unit; correspondingly multiplying the output data from the received signal shift register unit and the pseudo noise codes outputted from the pseudo noise code shift register unit by means of a plurality of multipliers; adding the data outputted from the plurality of multipliers and storing the added result as the phase information and energy value for one path; repeatedly performing the above procedure until the phase information and energy values for all paths are stored; and selecting the path corresponding to a largest value in the stored phase information and energy values for all paths and informing a demodulator of the selected path. Thereby, the synchronization tracking device can reduce the time necessary for the synchronization tracking and continuously correct the information for a selected path, thereby improving the performance of the receiver.

Abstract translation: 一种码分多址（CDMA）接收机中的同步跟踪装置和方法，包括以预定速度对与多个码片相对应的接收信号进行过采样，并将过采样信号顺序地存储在接收信号移位寄存器单元中; 将伪噪声码发生器中产生的伪噪声码顺序地存储在码片单元中的伪噪声码移位寄存器单元中; 通过多个乘法器相应地将来自接收信号移位寄存器单元的输出数据和从伪噪声码移位寄存器单元输出的伪噪声码相乘; 将从多个乘法器输出的数据相加并存储相加结果作为一个路径的相位信息和能量值; 重复执行上述过程直到存储所有路径的相位信息和能量值; 并且选择对应于所存储的相位信息中的最大值的路径和所有路径的能量值，并将所选择的路径通知解调器。 因此，同步跟踪装置可以减少同步跟踪所需的时间，并连续校正所选路径的信息，从而提高接收机的性能。