Supercharge Your Innovation With Domain-Expert AI Agents!

A high-precision detection method for random access channel of narrowband Internet of Things

A random access channel and narrowband Internet of Things technology, applied in the field of mobile communication, can solve the problems of random access signal delay and frequency offset estimation error, low detection probability, etc., to achieve the effect of improving estimation accuracy and detection probability

Active Publication Date: 2022-07-05
成都爱瑞无线科技有限公司
View PDF17 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) The time delay and frequency offset estimation error of the random access signal is relatively large;
[0006] (2) Low detection probability

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A high-precision detection method for random access channel of narrowband Internet of Things
  • A high-precision detection method for random access channel of narrowband Internet of Things
  • A high-precision detection method for random access channel of narrowband Internet of Things

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings:

[0021] A signal detection method used in a communication system, comprising the steps of:

[0022] Obtain baseband time-domain signals;

[0023] The cyclic prefix is ​​removed from the time domain signal, and Fourier transform is performed to obtain the frequency domain signal of the received signal;

[0024] Perform channel estimation on the received frequency domain signal and the local reference signal, and obtain the LS channel estimation value of the reference signal;

[0025] The iterative method is used to perform frequency offset estimation and frequency offset compensation, time offset estimation and time offset compensation, and obtain the combined final frequency offset estimation and final time offset estimation value;

[0026] Use the combined final frequency offset estimate and the combined final time offset estimate to compensate the LS channel estimat...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a signal detection method used in a communication system, comprising the steps of: obtaining a baseband time domain signal; obtaining a frequency domain signal of a received signal; obtaining an LS channel estimation value of a reference signal; and using an iterative method to estimate frequency offset and frequency offset compensation, time offset estimation and time offset compensation to obtain the combined final frequency offset estimate and final time offset estimate; combine the channel estimates; calculate and obtain the estimated signal-to-noise ratio; random access signal detection. The invention can improve the estimation accuracy of frequency offset and time offset, and improve the detection probability of random access channel.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, and in particular relates to a high-precision detection method for a random access channel of the narrowband Internet of Things, which adopts an iterative method to improve the estimation accuracy of frequency offset and time offset. Background technique [0002] With the development of Narrow Band Internet of Things (NB-IoT) communication technology, a wide variety of services such as low cost, low power consumption, wide coverage, long distance, and low bandwidth have been born. [0003] as attached figure 1 The structure of a typical narrowband IoT random access signal is shown in Figure 1. A complete random access signal transmission is defined as a random access signal cycle, and a random access signal cycle consists of several preambles. A preamble signal consists of several symbol groups (Symbol Group), a symbol group consists of a cyclic prefix (CP) and several identical sym...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L25/02H04W74/08
CPCH04L27/266H04L25/0228H04W74/0833Y02D30/70
Inventor 罗旬张骞肖航孟贤琴
Owner 成都爱瑞无线科技有限公司
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com