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Cell search method and device based on FPGA

A cell search and device technology, applied in the field of communication, can solve the problems of high resource overhead and large multiplier consumption, and achieve the effects of convenient control, real-time time synchronization and frequency synchronization, and reduced resource consumption

Inactive Publication Date: 2020-04-28
POTEVIO INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

Since DDC, FIR, correlation and other algorithms are involved in the cell search process, the multiplier consumes a lot, so parallel instantiation of four cell search modules is very expensive for FPGA resources.

Method used

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  • Cell search method and device based on FPGA
  • Cell search method and device based on FPGA
  • Cell search method and device based on FPGA

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Embodiment Construction

[0037] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and examples.

[0038] The traditional cell search process is: first perform DDC and FIR, then use 5ms data to perform primary synchronization sequence correlation, determine the 5ms synchronization position and sector ID results, and then perform rough frequency offset estimation and secondary synchronization sequence correlation. These operations can be performed in parallel After that, the frequency offset estimation module outputs the frequency offset, and the auxiliary synchronization related module confirms the 10ms synchronization position and PCI. The timing diagram of its sub-module implementation is as follows: figure 2 shown.

[0039] In order to reduce FPGA resource consumption, this application modifies the structure of the cell search module to su...

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Abstract

The invention discloses a cell search method based on an FPGA, and the method comprises the steps: the search period of a physical cell identifier PCI is changed from 10ms to 40ms, and a plurality ofcells share a cell search module; when cell search is carried out for the first time, main synchronization sequence correlation is completed within the time length of 5ms, and after auxiliary synchronization sequence correlation is completed, a timing position is determined; for cell search except for the first time, only master synchronization sequence correlation needs to be carried out, searchis carried out within the set time length near the timing position determined last time, and the timing position is updated. The invention further discloses a corresponding cell search device based onthe FPGA. Through the technical scheme disclosed by the invention, multi-cell PCI detection, real-time time synchronization and frequency synchronization can be realized in an LTE multi-cell scene, and resource configuration is optimized.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular to an FPGA-based cell search method and device applied in an LTE multi-cell scenario. Background technique [0002] At present, the instruments and equipment used for network construction, maintenance, and optimization on the market mainly include: drive testers, protocol analyzers, frequency sweepers, spectrum analyzers, base station testers, and bit error detectors. These instrumentation equipment can provide comprehensive supporting support for the radio frequency index test of the construction, operation and maintenance, network optimization departments of operators and equipment manufacturers, and the spectrum monitoring, management and interference investigation of the National Wireless Commission. Due to the simultaneous coverage of multiple operators and multiple cells in the wireless environment, the ability of instrumentation equipment to support mul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/02H04W56/00H04L27/26
CPCH04W24/02H04W56/00H04W56/0035H04L27/2657
Inventor 陶雄强胡嘉欣
Owner POTEVIO INFORMATION TECH CO LTD
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