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Frequency offset estimation method and system, electronic equipment and storage medium

A frequency offset estimation and frequency offset estimation technology, which is applied in the communication field, can solve the problems of rigid post-processing mechanism and difficulty in setting standard parameters of all scenarios, and achieve the effect of improving confidence

Active Publication Date: 2020-03-27
UNISOC CHONGQING TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art in the frequency offset estimation process, especially in weak signal scenarios, that the post-processing mechanism for estimation results is rigid and it is difficult to set standard parameters common to all scenarios, Provide a frequency offset estimation method, system, electronic equipment and storage medium

Method used

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  • Frequency offset estimation method and system, electronic equipment and storage medium
  • Frequency offset estimation method and system, electronic equipment and storage medium
  • Frequency offset estimation method and system, electronic equipment and storage medium

Examples

Experimental program
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Effect test

Embodiment 1

[0056] figure 1 A frequency offset estimation method is shown. The frequency offset estimation method is suitable for estimating the frequency difference between a receiver and a transmitter in various communication systems, and is especially suitable for estimating the frequency difference when the signal quality is poor. The frequency offset estimation method includes the following steps:

[0057] Step 11: Receive subframe samples of downlink physical channels.

[0058] Step 12: Calculate signal power information and interference power information based on the subframe samples.

[0059] Step 13: Calculate an estimated frequency offset value based on the signal power information and the interference sound power information.

[0060] The traditional frequency offset estimation method usually only considers the signal factor, but does not consider the influence of the noise factor on the frequency offset estimation. The frequency offset estimation method of this embodiment ...

Embodiment 2

[0062] This embodiment is a further description on Embodiment 1. The frequency offset estimation method in this embodiment provides a specific process of calculating signal power information and interference power information, as figure 2 As shown, step 12 specifically includes:

[0063] Step 121: Perform time-frequency conversion on the time-domain received data in the subframe samples to obtain frequency-domain received physical signals corresponding to each OFDM symbol carrying physical signals in the subframe samples.

[0064] Step 122: Reconstruct the local physical signal corresponding to the OFDM.

[0065] Step 123: Calculate the frequency-domain channel impulse response corresponding to the OFDM according to the received physical signal in the frequency domain and the local physical signal.

[0066] Step 124: Calculate channel phase difference information and interference sound power information according to the frequency domain channel impulse response.

[0067] S...

Embodiment 3

[0106] Figure 4 A frequency offset estimation system of this embodiment is shown. The frequency offset estimating system is suitable for estimating the frequency difference between the receiver and the transmitter in various communication systems, and is especially suitable for estimating the frequency difference when the signal quality is poor. The frequency offset estimation system includes: a sample receiving module 21 , an information calculation module 22 and a frequency offset estimation module 23 .

[0107] The sample receiving module 21 is configured to receive subframe samples of downlink physical channels;

[0108] The information calculation module 22 is configured to calculate signal power information and interference power information based on the subframe samples;

[0109] The frequency offset estimation module 23 is configured to calculate an estimated frequency offset value based on the signal power information and the interference sound power information. ...

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Abstract

The invention discloses a frequency offset estimation method and system, electronic equipment and a storage medium. The frequency offset estimation method comprises the following steps: receiving a subframe sample of a downlink physical channel; calculating signal power information and disturbing sound power information based on the sub-frame sample; and calculating an estimated frequency offset value based on the signal power information and the disturbing sound power information. In the calculation process of weighting the disturbing sound factor to the estimated frequency offset value, theestimated result is output in a self-adaptive weighting mode through the weight relation between the signal and the disturbing sound, the confidence degree of the output result is improved, meanwhile,other post-processing does not need to be conducted on the estimated value, and the method can be flexibly suitable for various scenes.

Description

technical field [0001] The invention belongs to the communication field, and in particular relates to a frequency offset estimation method, system, electronic equipment and storage medium. Background technique [0002] With the increasingly obvious differentiation of consumer application requirements, the differentiation of mobile terminal application scenarios is also increasing. It is difficult to have a technical model that can represent the optimal compromise between capability and efficiency in various application scenarios. Therefore, according to the requirements of different application scenarios, mobile communication has evolved into three categories of scenarios and their application technologies: enhanced mobile broadband (eMBB), massive machine-type communication (mMTC) and ultra-reliable low-latency (uRLLC). Among them, mMTC, eMTC (super-connected Internet of Things), and NBIOT (narrowband Internet of Things) are the application scenarios of the Internet of Thin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
CPCH04L27/2657
Inventor 杨恩浩谭舒林登彪陈美燕杨柳飞
Owner UNISOC CHONGQING TECH CO LTD
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