公开(公告)号：US09107158B2

公开(公告)日：2015-08-11

申请号：US14006960

申请日：2012-01-11

申请人： Xiumei Yang ,  Yong Xiong ,  Guoqing Jia ,  Lei Zhu ,  Shupei Lei ,  Zhengkun Yi

发明人： Xiumei Yang ,  Yong Xiong ,  Guoqing Jia ,  Lei Zhu ,  Shupei Lei ,  Zhengkun Yi

IPC分类号： H04W56/00 ,  H04J11/00

CPC分类号： H04W56/003 ,  H04J11/0073

摘要： A robust downlink timing synchronization method for reducing the influence of initial frequency offset and ensuring the timing synchronization in a low signal-to-noise ratio interval in an LTE system, which includes: step 1: a receiving terminal continuously storing time domain signal sequences of M PSS transmission periods; step 2: performing narrowband filtering on the time domain signal sequences of the M PSS transmission periods; step 3: performing down-sampling on data obtained after the filtering; step 4: performing sliding differential mirror correlation on the down-sampling data of an mth PSS transmission period to obtain a correlation value of an ith instant; step 5: superposing correlation results to obtain a superposition result; and step 6: determining whether the superposition result has an obvious peak interval; if yes, completing capturing the primary synchronization signal, and obtaining timing information according to a position of a maximum correlation peak; otherwise, returning to step 1.

摘要翻译： 一种用于在LTE系统中降低初始频率偏移的影响并确保低信噪比间隔的定时同步的鲁棒下行链路定时同步方法，其包括：步骤1：接收终端连续存储时域信号序列 M PSS传输周期; 步骤2：对M PSS传输周期的时域信号序列进行窄带滤波; 步骤3：对过滤后获得的数据进行下采样; 步骤4：对第m PSS发送周期的下采样数据执行滑差分镜相关，以获得第i个时刻的相关值; 步骤5：叠加相关结果以获得叠加结果; 步骤6：确定叠加结果是否具有明显的峰值间隔; 如果是，则完成捕获主同步信号，并根据最大相关峰的位置获得定时信息; 否则返回步骤1。

公开(公告)号：US20140036779A1

公开(公告)日：2014-02-06

申请号：US14006960

申请日：2012-01-11

申请人： Xiumei Yang ,  Yong Xiong ,  Guoqing Jia ,  Lei Zhu ,  Shupei Lei ,  Zhengkun Yi

发明人： Xiumei Yang ,  Yong Xiong ,  Guoqing Jia ,  Lei Zhu ,  Shupei Lei ,  Zhengkun Yi

IPC分类号： H04W56/00

CPC分类号： H04W56/003 ,  H04J11/0073

摘要： Disclosed is a robust downlink timing synchronization method in an LTE system, which includes: step 1: a receiving terminal continuously storing time domain signal sequences of M PSS transmission periods; step 2: performing narrowband filtering on the time domain signal sequences of the M PSS transmission periods; step 3: performing down-sampling on data obtained after the filtering; step 4: performing sliding differential mirror correlation on the down-sampling data of an mth PSS transmission period to obtain a correlation value of an ith instant; step 5: superposing correlation results to obtain a superposition result; and step 6: determining whether the superposition result has an obvious peak interval; if yes, completing capturing the primary synchronization signal, and obtaining timing information according to a position of a maximum correlation peak; otherwise, returning to step 1. The present invention effectively reduces the influence of initial frequency offset and ensures the timing synchronization in a low signal-to-noise ratio interval. The present invention has fine utility under the receiving conditions where the initial frequency offset is not compensated and the channel transmission environment is unknown, and has good robustness.

摘要翻译： 公开了LTE系统中的鲁棒下行链路定时同步方法，其包括：步骤1：接收终端连续存储M PSS传输周期的时域信号序列; 步骤2：对M PSS传输周期的时域信号序列进行窄带滤波; 步骤3：对过滤后获得的数据进行下采样; 步骤4：对第m PSS发送周期的下采样数据执行滑差分镜相关，以获得第i个时刻的相关值; 步骤5：叠加相关结果以获得叠加结果; 步骤6：确定叠加结果是否具有明显的峰值间隔; 如果是，则完成捕获主同步信号，并根据最大相关峰的位置获得定时信息; 本发明有效地降低了初始频率偏移的影响，并确保了低信噪比间隔的定时同步。 本发明在不补偿初始频率偏移和信道传输环境未知的接收条件下具有良好的实用性，并且具有良好的鲁棒性。