Signal synchronization detection method, device, equipment and system
A signal synchronization and detection method technology, applied in the direction of synchronization device, transmission system, multi-frequency code system, etc., can solve the problems of poor reliability and achieve high reliability
Active Publication Date: 2019-03-15
COMBA TELECOM SYST CHINA LTD
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Problems solved by technology
[0004] During the implementation process, the inventor found at least the following problems in the traditional technology: within the coverage of the NB-IoT base station system, the terminal system must complete the cell search and access process in order to connect to the base station. During the cell search process, the cell downlink synchronization signal The detection and synchronization of the
However, the current signal synchronization and detection steps have the problem of poor reliability
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[0053] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.
[0054]The signal synchronization detection method provided in the present application can be applied in the signal detection synchronization process of various communication devices. Specifically, it can be applied in the cell search access process when the terminal is connected to the base station, and can also be applied in the cell search access process in which the base station is connected to another base station. Furthermore, it can be widely used in wireless communication systems of narrowband NB-IoT systems. The signal synchronization detection method provided by ...
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The invention relates to a signal synchronization detection method, device, equipment and system. The method comprises the following steps: performing time domain related processing on a received airinterface signal to obtain a time domain related sequence; acquiring various power values of the time domain related sequence and screening out sequences points with the power values greater than thepreset related threshold, and obtaining a related peak sequence according to the screened sequence point; processing the related peak sequence according to a preset screening rule to obtain various combined peak sequences, wherein the preset screening rule comprises taking preset symbol length as the screening interval and the NPSS cyclic transmission frequency as the screening amount; if the number of the non-zero peak in the combined peak sequence is greater than the peak number threshold value, confirming the combined peak sequence as the effective combined peak sequence; acquiring the maximum matching power of the effective combined peak sequence; comparing various maximum matching power to obtain the maximum combined peak power value; and determining a signal synchronization detectionlocation point and acquiring timing error when confirming that the synchronization signal is detected in the air interface signal according to the maximum combined peak power value.
Description
technical field [0001] The present application relates to the technical field of mobile broadband communication, in particular to a signal synchronization detection method, device, equipment and system. Background technique [0002] The Internet of Things is an important part of the new generation of information technology, which is characterized by collaborative connections between things. Communication between things is a necessary condition for realizing collaborative connection between things. Existing 2G (2-Generation wirelesstelephone technology, second-generation mobile phone communication technical specifications) / 3G (3rd-Generation, third-generation mobile communication technology) / 4G (the 4th Generation mobile communication technology, fourth-generation mobile communication technology) Communication protocols cannot meet the requirements of low power, low cost, wide coverage and large capacity. Some other low-power standard protocols such as Lora (Long Range, long...
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IPC IPC(8): H04W56/00H04B17/327H04L27/26
CPCH04L27/2614H04W56/0055H04B17/327Y02D30/70
Inventor 付杰尉孙文鹏
Owner COMBA TELECOM SYST CHINA LTD