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Method and device for estimating terminal moving speed

A moving speed and terminal technology, applied in electrical components, wireless communication, etc., can solve the problems of large noise impact and inaccurate estimation results, and achieve the effect of improving accuracy, wide application range, and reducing the impact of noise.

Inactive Publication Date: 2018-07-24
POTEVIO INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention provides a method and device for estimating the mobile speed of a terminal to solve the technical problems in the prior art that are greatly affected by noise and the estimation result is not accurate enough

Method used

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  • Method and device for estimating terminal moving speed
  • Method and device for estimating terminal moving speed
  • Method and device for estimating terminal moving speed

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Experimental program
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Embodiment 1

[0079] Taking the speed estimation of the mobile speed of the terminal in the uplink OFDM system as an example, the specific implementation process of an embodiment of the present invention will be described in detail, see figure 2 :

[0080] Step 201: Select two qualified frequency-domain channels within a 0.5 ms sampling interval obtained by estimating the position of the frequency-domain demodulation reference signal, calculate the estimated noise value, and proceed to step 202 and step 206 .

[0081] In this step, it is first judged whether the target user in the current subframe has resource allocation, and if so, the signal received on the first receiving antenna at the base station is selected, and the frequency domain channel obtained by DMRS position estimation in the subframe is extracted. Such as image 3 As shown, what Embodiment 1 of the present invention uses is the DMRS pilot channel information on the Physical Uplink Shared Channel (PUSCH) in the uplink OFDM ...

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Abstract

The invention provides a terminal movement speed estimation method and a device thereof. The terminal movement speed estimation method comprises the steps of selecting a frequency domain channel which is obtained through estimating the positions of two frequency domain demodulation reference signals that accord with a condition in a sampling interval, calculating an estimated noise value; introducing a correction factor, and calculating an autocorrelation function value of the frequency domain channel in a corresponding sampling interval in combination with the estimated noise value; introducing a restriction factor, determining whether the module of the autocorrelation function value is smaller than the restriction factor, if yes, utilizing the autocorrelation function value as effective data, performing interactive averaging on all originally acquired autocorrelation function values in a same sampling interval, calculating the terminal movement speed; and if no, following the terminal movement speed which is calculated by the autocorrelation function value that is acquired in a last period. The terminal movement speed estimation method and the device have wide application range and can estimate the terminal movement speed more stably and more accurately.

Description

technical field [0001] The present invention relates to the field of wireless communication technology, in particular to a method and device for estimating a moving speed of a terminal. Background technique [0002] Long Term Evolution (LTE) wireless communication technology is based on Orthogonal Frequency Division Multiplexing (OFDM) technology. According to the OFDM standard, data is transmitted through many mutually orthogonal subcarriers, and there is a guard interval to effectively overcome the problem of multipath interference. In the communication system, the fast movement of the terminal will produce a large Doppler frequency shift, especially in the multipath environment, it will cause the rapid fading and the rapid change of the signal amplitude, and then destroy the regularity between the subcarriers of the received signal. The traffic characteristics greatly affect the system performance. [0003] The LTE system adopts Multiple-Input Multiple-Output (MIMO) tec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W24/00H04W64/00
Inventor 宋磊彭木根王明敏吕伯轩
Owner POTEVIO INFORMATION TECH CO LTD
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