Device and method for searching same-frequency neighbor cells of long term evolution (LTE) system

Abstract

The invention discloses a device and a method for searching same-frequency neighbor cells of a long term evolution (LTE) system. The method comprises the following steps of: performing primary synchronization signal (PSS) detection on a processed digital signal, and acquiring first M peak values, which are arranged from large to small, in the relevant accumulation power of the PSS, and the corresponding position and cell intra-group identity (Nid) 2 of each peak value; with a preset PSS effective peak value judgment condition, performing effectiveness judgment on the peak values after PSS detection, so that the aims of eliminating false peak values and reducing the probability in detection of false cells are fulfilled; performing SSS detection on each determined PSS effective peak value; and with a preset SSS effective peak value judgment condition, performing effectiveness judgment on the peak values after SSS detection, so that the number of cells can be quickly and accurately determined, and the problem that the neighbor cells cannot be distinguished because the position and Nid2 of the PSS are the same is effectively solved.

Description

technical field [0001] The present invention relates to the field of communication technologies, and in particular to an LTE (Long Term Evolution system, Long Term Evolution system) search device and method for same-frequency adjacent cells. Background technique [0002] At present, in the transition process from the 3G era to the 4G era in the communication technology field, the LTE system is widely regarded as a quasi-4G wireless communication system. In the LTE system, in order to support mobility, UE (User Equipment, user equipment) needs to periodically search and measure the surrounding neighboring cells. When the signal quality of the neighboring cells is higher than that of the serving cell, it is judged whether the current UE needs to be handed over to the neighborhood. Therefore, accurate and fast neighbor cell search is currently a precondition for ensuring correct handover of the UE. [0003] In the LTE system, the UE uses PSS (Primary Synchronization Signal, P...

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Problems solved by technology

[0008] In view of this, the object of the present invention is to provide a same-frequency neighbor cell search device and method of an LTE system, to overcome the lack of effective judgment of PSS and SSS detection results in the prior art, and to increase the probability of detecting false cells , resulting in the inability to quickly and accurately search for all neighbors

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