公开(公告)号：US20140254580A1

公开(公告)日：2014-09-11

申请号：US13938846

申请日：2013-07-10

Applicant: Samsung Electronics Co., Ltd.

Inventor： Myung-Joon SHIM ,  Seung-Hwan WON ,  Sang-Won CHOI ,  Jong-Gun MOON ,  Jong-Yoon HWANG

IPC: H04W56/00

CPC classification number: H04W56/00

Abstract: A method of acquiring initial synchronization in a code division multiple access mobile communication system is provided. The method includes quantizing a received signal into a plurality of levels, calculating correlation values of the quantized received signal and a local code, calculating absolute values of the correlation values, and detecting a position of a maximum value which exceeds a threshold among the absolute values and an ID of a downlink synchronization (SYNC-DL) sequence and determining timing values of available cells and energy values corresponding to the timing values.

Abstract translation: 提供了一种在码分多址移动通信系统中获取初始同步的方法。 该方法包括将接收到的信号量化为多个电平，计算量化的接收信号和本地码的相关值，计算相关值的绝对值，以及检测绝对值中超过阈值的最大值的位置 以及下行链路同步（SYNC-DL）序列的ID，并确定与定时值相对应的可用小区和能量值的定时值。

公开(公告)号：US20140254562A1

公开(公告)日：2014-09-11

申请号：US13937430

申请日：2013-07-09

Applicant: Samsung Electronics Co. Ltd.

Inventor： Myung-Joon SHIM ,  Seung-Hwan WON ,  Sang-Won CHOI ,  Jong-Gun MOON ,  Jong-Yoon HWANG

IPC: H04W56/00

CPC classification number: H04W56/00 ,  H04B1/7073

Abstract: A method and an apparatus for acquiring downlink frame synchronization are provided. The method includes phase-rotating a mid-amble of a first Time Slot (TS) of a received sub-frame within an area and estimating a Channel Impulse Response (CIR), calculating a Maximum Likelihood (ML) between a downlink synchronization code of the received sub-frame and a downlink synchronization code generated in a terminal by using the estimated CIR, correlating downlink synchronization codes of a plurality of sub-frames and the downlink synchronization code generated and calculating ML values of the plurality of sub-frames with respect to the plurality of sub-frames corresponding to M Transmission Time Intervals (TTIs), and calculating hypothesis values of hypotheses according to a frequency interval and a phase offset of the generated downlink synchronization code based on the calculated ML values of the plurality of sub-frames and drawing a frequency offset and a hypothesis corresponding to a maximum value.

Abstract translation: 提供了一种用于获取下行链路帧同步的方法和装置。 该方法包括在区域内相位旋转接收到的子帧的第一时隙（TS）的中间码，并估计信道脉冲响应（CIR），计算下行链路同步码之间的最大似然（ML） 接收到的子帧和通过使用估计的CIR在终端中生成的下行链路同步码，将多个子帧的下行链路同步码和生成的下行链路同步码相关联，并且相对于多个子帧的ML值计算 对应于M个传输时间间隔（TTI）的多个子帧，并且基于所计算出的多个子帧的ML值，根据生成的下行链路同步码的频率间隔和相位偏移来计算假设的假设值， 并绘制频率偏移和对应于最大值的假设。