公开(公告)号：US10187243B2

公开(公告)日：2019-01-22

申请号：US15165583

申请日：2016-05-26

Applicant: Huawei Technologies Co., Ltd.

Inventor： Wei Zhu ,  Yunbao Zeng ,  Hui Zhao ,  Long Zhao

IPC: G01R31/08 ,  H04L27/26 ,  H04B3/54 ,  H04L5/22

Abstract: The present invention discloses a preamble sequence generating method and device, which are used to avoid a problem, caused by damages to a preamble sequence resulting from interference in an NB-PLC system, that it is difficult for a receive end to correctly perform timing synchronization. The method includes: determining a quantity m of orthogonal frequency division multiplexing OFDM symbols that constitute a single pattern in a preamble sequence, where m is not less than 2; and generating a preamble sequence according to m, so that every m OFDM symbols that are in the generated preamble sequence and consecutive in a time domain constitute a single pattern, and the generated preamble sequence includes at least two patterns, where the patterns are different from each other. Embodiments of the present invention further provide a timing synchronization method and device.

公开(公告)号：US20160277230A1

公开(公告)日：2016-09-22

申请号：US15165583

申请日：2016-05-26

Applicant: Huawei Technologies Co., Ltd.

Inventor： Wei Zhu ,  Yunbao Zeng ,  Liangchuan Kang ,  Hui Zhao ,  Long Zhao

IPC: H04L27/26 ,  H04B3/54 ,  H04L5/22

CPC classification number: H04L27/2692 ,  H04B3/54 ,  H04L5/22 ,  H04L27/2613 ,  H04L27/2662 ,  H04L27/2688

Abstract: The present invention discloses a preamble sequence generating method and device, which are used to avoid a problem, caused by damages to a preamble sequence resulting from interference in an NB-PLC system, that it is difficult for a receive end to correctly perform timing synchronization. The method includes: determining a quantity m of orthogonal frequency division multiplexing OFDM symbols that constitute a single pattern in a preamble sequence, where m is not less than 2; and generating a preamble sequence according to m, so that every m OFDM symbols that are in the generated preamble sequence and consecutive in a time domain constitute a single pattern, and the generated preamble sequence includes at least two patterns, where the patterns are different from each other. Embodiments of the present invention further provide a timing synchronization method and device.

Abstract translation: 本发明公开了一种前导序列生成方法和装置，其用于避免由于NB-PLC系统中的干扰而导致的前导序列的损坏而导致的问题，接收端难以正确地执行定时同步 。 该方法包括：确定在前导码序列中构成单个模式的正交频分复用OFDM符号的数量m，其中m不小于2; 并根据m产生前同步码序列，使得在所生成的前导码序列中并且在时域中连续的每m个OFDM符号构成单个模式，并且所生成的前导序列包括至少两个模式，其中模式不同于 彼此。 本发明的实施例还提供一种定时同步方法和装置。