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Method and device for estimating time-frequency offset of narrowband Internet of Things, and storage medium

A narrow-band Internet of Things and partial estimation technology, applied in the field of communication, can solve the problems of large amount of calculation and long calculation time, and achieve the effect of reducing the amount of calculation, saving memory, and reducing the length of calculation

Pending Publication Date: 2022-03-01
广州粒子微电子有限公司
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Problems solved by technology

[0006] The embodiment of the present application provides a technical solution for NB-IoT time-frequency offset estimation with simple calculations, which is used to solve the technical problem in the prior art that the NB-IoT time-frequency offset estimation has a large amount of calculation and the calculation time is too long

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  • Method and device for estimating time-frequency offset of narrowband Internet of Things, and storage medium

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[0051] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0052]An embodiment of the present invention provides a method for estimating time-frequency offset of narrowband Internet of Things. Narrowband Internet of Things (NarrowBand Internet of Things) is a cellular network technology that supports cellular data connections of low-power devices over wide area networks. Narrowband IoT is based on Orthogonal...

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Abstract

The invention provides a narrowband Internet of Things time-frequency offset estimation method and device, and a storage medium. The method comprises the steps that at least one piece of preset sampling rate subframe data is acquired; performing self-correlation operation on a plurality of orthogonal frequency division multiplexing symbols in the preset sampling rate subframe data to generate a plurality of self-correlation operation values; when the plurality of self-correlation operation values meet a preset time offset estimation condition, determining a time offset value of a main synchronization signal of the narrowband Internet of Things; carrying out frequency offset value calculation on a plurality of orthogonal frequency division multiplexing symbols in the preset sampling rate subframe data by adopting a frequency offset estimation algorithm, and generating a frequency offset value of a main synchronization signal of the narrowband Internet of Things; and outputting the time offset value and the frequency offset value of the main synchronization signal of the narrowband Internet of Things. In this way, the calculation amount of the time-frequency offset of the narrowband Internet of Things is reduced, and then the calculation duration is shortened.

Description

technical field [0001] The present application relates to the field of communication technology, and in particular to a method, device and storage medium for estimating time-frequency offset of narrowband Internet of Things. Background technique [0002] The narrowband Internet of Things technology NB-IoT (Narrow Band Internet of Things) in the prior art supports the connection of low-power devices in the wide area network based on cellular data. NB-IoT technology has the characteristics of low cost, strong coverage, low power consumption, and large connections. Narrowband IoT technology is widely used in smart meters, smart parking, smart street lights, smart agriculture, white goods, remote control, health detection, industrial applications, etc. It is one of the basic connection technologies in the 5G era. Narrowband IoT technology is based on OFDM technology, and the estimation of symbol time deviation and carrier frequency deviation is its core technology, which is of ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/00H04L27/26
CPCH04L27/0014H04L27/2657H04L27/2671H04L27/2672H04L2027/0026
Inventor 刘华东
Owner 广州粒子微电子有限公司
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