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

A narrow-band Internet of Things and partial estimation technology, applied in the field of communication, can solve the problems of complex calculation of time-frequency offset estimation of narrow-band Internet of Things, achieve the effect of reducing complexity and processing delay, and improving accuracy

Active Publication Date: 2022-07-26
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 pre-computation to solve the problem of complex calculation of NB-IoT time-frequency offset estimation in the prior art

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

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[0047] In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below with reference to the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0048] Embodiments of the present invention provide a method for estimating time-frequency offset of narrowband Internet of Things. NarrowBand Internet of Things is a cellular-based network technology that supports cellular data connections for low-power devices over a wide area network. Narrowband IoT has four key points of low co...

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Abstract

The present application provides a time-frequency offset estimation method, device and storage medium for narrowband Internet of Things. The method includes: acquiring narrowband frequency domain primary synchronization signal NPSS data; conjugate multiplying the narrowband frequency domain primary synchronization signal NPSS data with local preset NPSS reference data to generate initial narrowband frequency domain primary synchronization signal NPSS data ; Carry out the first time offset algorithm processing to the subcarrier data in each orthogonal frequency division multiplexing OFDM symbol of the initial narrowband frequency domain primary synchronization signal NPSS data, and generate the final time offset estimation of the narrowband frequency domain primary synchronization signal NPSS value; perform the second frequency offset algorithm processing on the subcarrier data in each OFDM symbol of the initial narrowband frequency domain primary synchronization signal NPSS data to generate the final frequency offset of the narrowband frequency domain primary synchronization signal NPSS Estimated value; output the time offset estimated value and frequency offset estimated value of the final narrowband frequency domain primary synchronization signal NPSS.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular, to a time-frequency offset estimation method, device and storage medium for narrowband Internet of Things. Background technique [0002] In the prior art, the Narrow Band Internet of Things technology NB-IoT (Narrow Band Internet of Things) supports the connection of low-power devices in a wide area network based on cellular data. Narrowband IoT technology has four key nodes of low cost, strong coverage, low power consumption, and large connections. NB-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 orthogonal frequency division multiplexing technology, in which the estimation of symbol time deviation and carrier frequency deviatio...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/00H04L27/26
CPCH04L27/0014H04L27/2657H04L27/2671H04L27/2672H04L2027/0026
Inventor 梁智斌黄立新
Owner 广州粒子微电子有限公司