Narrowband Internet-of-Things timing synchronization method based on compressed sensing

A narrow-band Internet of Things and timing synchronization technology, which is applied in the direction of synchronization devices, digital transmission systems, electrical components, etc., to achieve the effect of improving service life, improving accuracy, and reducing initial access time and accuracy

Pending Publication Date: 2021-06-01
INSPUR COMM TECH CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

[0007] Although NB-IoT has many advantages, how to achieve timing synchronization by accurately and quickly reconstructing the synchronization sequence with less data information, and then constructing a green IoT wireless communication network is a challenging problem

Method used

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  • Narrowband Internet-of-Things timing synchronization method based on compressed sensing
  • Narrowband Internet-of-Things timing synchronization method based on compressed sensing
  • Narrowband Internet-of-Things timing synchronization method based on compressed sensing

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Embodiment 1

[0088] as attached figure 1 As shown, the compressed sensing-based narrowband Internet of Things timing synchronization method of the present invention, the method is specifically as follows:

[0089] (1) Obtain time-domain data from the front-end interface of the base station;

[0090] (2) Sliding window operation is performed according to the window length of 1 ms, and synchronization sequence reconstruction and correlation calculation are performed point by point;

[0091] (3) Determine the cut-off position of the sliding window:

[0092] ①. If you continue to slide the window, skip to step (2);

[0093] ②. If the sliding window is closed, then perform step (4);

[0094] (4) Synchronous position calculation.

[0095] In the present embodiment, in step (2), the synchronization sequence reconstruction adopts the orthogonal matching tracking algorithm; as attached Figure 5 As shown, the orthogonal matching tracking algorithm is as follows:

[0096] ①. Initialize the rec...

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Abstract

The invention discloses a narrowband Internet-of-Things timing synchronization method based on compressed sensing, belongs to the field of narrowband Internet-of-Things communication, and aims to solve the technical problem of how to accurately and quickly reconstruct a synchronization sequence through less data information to realize timing synchronization and further construct a green Internet-of-Things wireless communication network. According to the technical scheme, the method specifically comprises the following steps of: (1) acquiring time domain data from a front-end interface of a base station; (2) performing window sliding operation according to the window length of 1ms, and performing synchronous sequence reconstruction and relevancy calculation point by point; and (3) judging the cut-off position of the sliding window: (1) if the sliding window is continued, skipping to the step (2); (2) if the sliding window is cut off, executing the step (4); and (4) performing synchronous position calculation.

Description

technical field [0001] The invention relates to the communication field of the narrowband Internet of Things, in particular to a timing synchronization method of the narrowband Internet of Things based on compressed sensing. Background technique [0002] The Internet of Things (IoT, Internet of Things) plays a key role in smart cities, industry, agriculture and other fields. According to a survey by the International Energy Agency, by 2020, there will be more than 14 billion IoT devices. Narrowband Internet of Things (NB-IoT) is complementary to Long Term Evolution (LTE). NB-IoT not only has low energy consumption, but can also be directly deployed in GSM, Universal Mobile Telecommunications System (UMTS) and LTE. NB-IoT has four main features: [0003] (1) In the same frequency band, NB-IoT obtains 20dB minimum coupling loss (MCL) than traditional LTE, so the coverage is theoretically expanded by 100 times; [0004] (2) Large-scale connection capacity allows one NB IoT ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W56/00H04L27/26
CPCH04L27/2657H04L27/2675H04L27/2691H04W56/0055
Inventor 常越刘鹏军田炜
Owner INSPUR COMM TECH CO LTD
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