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Detection method and system for LTE downlink PSS (Primary Synchronization signal)

A technology of master synchronization signal and detection method, applied in the field of communication, can solve problems such as large amount of calculation

Active Publication Date: 2016-05-11
LEADCORE TECH
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Problems solved by technology

[0007] The purpose of the present invention is to provide a detection method and a detection system for an LTE downlink primary synchronization signal, so as to solve the problem that the calculation amount of the method for detecting the LTE downlink primary synchronization signal is too large by using the global optimization search algorithm in the prior art. question

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  • Detection method and system for LTE downlink PSS (Primary Synchronization signal)
  • Detection method and system for LTE downlink PSS (Primary Synchronization signal)
  • Detection method and system for LTE downlink PSS (Primary Synchronization signal)

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[0037]The method and system for detecting the LTE downlink primary synchronization signal proposed by the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that all the drawings are in a very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

[0038] Please refer to image 3 , 24' in the figure is PSS (Primary Synchronization Signal), and 23' is SSS (Secondary Synchronization Signal). Since the accurate and fast detection and estimation of PSS24' directly affects the detection and estimation of SSS23', it generally affects the performance of downlink synchronization. Next, the detection and estimation of PSS24' will be described in detail.

[0039] Please re...

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Abstract

The invention provides a detection method and system for LTE downlink PSS. The CP type and initial time deviation of OFDM symbols are estimated via the least square error criterion; and according to the estimation result, local optimized search of a small sliding window is carried out every an OFDM symbol length till subframe. A global optimized search algorithm in which PSS detection and calculation are carried out each time a time-domain sample value is received in subframe time in the prior art is decomposed into multiple local optimized search, the calculation amount of PSS detection is greatly reduced, the PSS can be detected rapidly and accurately, and the performance of LTE downlink synchronization is improved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method for detecting an LTE downlink primary synchronization signal and a detection system thereof. Background technique [0002] The LTE (Long Term Evolution, long-term evolution) project is an evolution of 3G (3rd Generation, third-generation mobile communication), and its proposal began at the 3GPP Toronto conference in 2004. LTE adopts Orthrogonal Frequency Division Multiplexing (OFDM) technology and Multiple Input Multiple Output (Multiple Input Multiple Output, MIMO) technology as the physical layer wireless air interface standard. LTE can provide a peak rate of 326Mbit / s downlink and 86Mbit / s uplink under the 20MHz spectrum bandwidth. [0003] Please refer to figure 1 , LTE downlink synchronization is realized through PSS (Primary Synchronization Signal) 24 and SSS (Secondary Synchronization Signal) 23 of SCH (Synchronization Channel). Among them, the a...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
Inventor 莫建林
Owner LEADCORE TECH
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