Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Frequency offset estimation method and system for narrowband physical uplink shared channel of wireless comprehensive tester

A technology of physical uplink sharing and wireless comprehensive measuring instrument, which is applied in the field of frequency offset estimation to achieve the effect of expanding the range of frequency offset estimation

Active Publication Date: 2021-07-09
深圳市极致汇仪科技有限公司
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in the receiving process due to the phase noise caused by the instability of the transmitter and receiver signal generators, or by the Doppler frequency shift f d CFO

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
  • Frequency offset estimation method and system for narrowband physical uplink shared channel of wireless comprehensive tester
  • Frequency offset estimation method and system for narrowband physical uplink shared channel of wireless comprehensive tester
  • Frequency offset estimation method and system for narrowband physical uplink shared channel of wireless comprehensive tester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0043] The preferred embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0044] This example first explains the terms: NB-IOT (Narrow Band Internet of Things) is narrowband Internet of Things, NPUSCH (Narrowband Physical Uplink Shared Channel) is narrowband physical uplink shared channel, OFDM (Orthogonal Frequency Division Multiplexing) is orthogonal frequency division Multiplexing, GSM (Global System for Mobile Communication) is the global mobile communication system, LTE (Long Term Evolution) is long-term evolution, SC-FDMA (Single-carrier Frequency-Division Multiple Access) is single-carrier frequency-division multiple access, ICI (Inter -Carrier Interference) is inter-carrier interference, DUT (Device Under Test) is the device under test or equipment under test, CFO (Carrier Frequency Offset) is the carrier frequency offset, and CP (Cyclic Prefix) is the cyclic prefix.

[0045] It is assumed that ...

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 present invention provides a frequency offset estimation method and system for a narrowband physical uplink shared channel of a wireless comprehensive tester. The frequency offset estimation method includes the following steps: step S1, using a narrowband demodulation reference signal to perform frequency offset estimation; step S2, obtaining The initial maximum frequency offset value; step S3, calculate the phase value of the time domain data of the local narrowband demodulation reference signal; step S4, carry out frequency offset compensation to the time domain signal of the received narrowband demodulation reference signal, and calculate the frequency The phase value of the time-domain data of the narrowband demodulation reference signal after offset compensation; step S5, calculate the phase difference between the received narrowband demodulation reference signal and the local narrowband demodulation reference signal; step S6, calculate the phase difference Its variance; Step S7, calculate the final estimated value of frequency offset by the minimum variance value of the variance. The invention enables the wireless comprehensive tester to greatly expand the range of frequency offset estimation on the basis of ensuring the accuracy of frequency offset estimation.

Description

technical field [0001] The present invention relates to a frequency offset estimation method, in particular to a frequency offset estimation method for a narrowband physical uplink shared channel of a wireless comprehensive tester, and to a frequency offset estimation method using the narrowband physical uplink shared channel of a wireless comprehensive tester. biased estimation system. Background technique [0002] Orthogonal Frequency Division Multiplexing (OFDM) technology has become the most competitive transmission technology in mobile communication systems due to its high spectrum utilization, strong anti-multipath fading ability and reliable transmission. The high spectrum utilization and transmission reliability of OFDM technology are based on the orthogonality of subcarrier spacing. The existence of carrier frequency offset destroys the orthogonality between subcarriers, resulting in serious subcarrier spacing interference (ICI). The signal-to-noise ratio is lost, ...

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): H04L27/26H04L25/02
CPCH04L25/0224H04L27/2657H04L27/266
Inventor 吴帅周英
Owner 深圳市极致汇仪科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com