Signal synchronization method and signal synchronization device
A technology of signal synchronization and synchronization sequence, applied in the field of communication, can solve the problems of large amount of computation and high computational complexity, and achieve the effect of reducing computational complexity
Active Publication Date: 2019-06-28
HUAWEI TECH CO LTD
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In this way, the mobile terminal must detect all received data points, which requires a large amount of calculation and high computational complexity.
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[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.
[0025] The mobile terminal (Mobile Terminal) in the embodiment of the present invention may be referred to as a user equipment (User Equipment, "UE" for short), a terminal (Terminal), a mobile station (Mobile Station, "MS" for short), and the like. The mobile terminal may be a mobile phone (or "cellular" phone) or a computer with a mobile terminal, such as a portable, pocket, hand-held, computer built-in or vehicle-mounted mobile device.
[0026] figure 1...
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Embodiments of the present invention provide a signal synchronization method and device, the method comprising: performing coprime sampling on a first synchronization sequence stored locally to obtain a first sampled sequence; determining, according to a second synchronization sequence included in a synchronization signal transmitted by a base station, a plurality of short sequences; performing coprime sampling respectively on the plurality of short sequences to obtain a plurality of second sampled sequences; and if a peak value in a first set of correlation values obtained from cross-correlation computation between the first sampled sequence and the plurality of second sampled sequences is greater than a first predetermined threshold, using a position of the second synchronization sequence corresponding to the peak value in the first set of correlation values as an initial position to perform synchronization with the base station. In embodiments of the present invention, cross-correlation computation is performed on sequences obtained from performing coprime sampling respectively on a local synchronization sequence and a received synchronization sequence, to determine an initial position to perform synchronization with a base station, thereby reducing computational complexity.
Description
technical field [0001] The present invention relates to the communication field, and more particularly, to a signal synchronization method and a signal synchronization device. Background technique [0002] To access the base station and communicate with the base station, the mobile terminal needs to be synchronized with the base station. Symbol timing synchronization is the first step in the mobile terminal's cell search to achieve synchronization. In a general communication system, the specific position of bit synchronization or frame synchronization can be obtained through the good autocorrelation property of the bit synchronization sequence or frame synchronization sequence. Similarly, in a long term evolution technology (Long Term Evolution, LTE) system, the position of symbol timing synchronization can also be obtained based on the autocorrelation characteristic of the synchronization sequence. [0003] In a Long Term Evolution-Machine-To-Machine (LTE-M) system, an ef...
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IPC IPC(8): H04L7/00H04W56/00
CPCH04L7/00
Inventor 王铠尧刘永俊钟怡
Owner HUAWEI TECH CO LTD