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A channel estimation optimization method based on big data analysis

A technology of channel estimation and optimization method, which is applied in the direction of channel estimation, digital transmission system, baseband system components, etc., which can solve the problems of performance deterioration, inaccurate estimation, and high bit error rate of hardware communication system, so as to improve accuracy and reduce The effect of bit error rate

Active Publication Date: 2022-03-22
SHANGHAI RES CENT FOR WIRELESS TECH
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Problems solved by technology

[0006] The present invention provides a channel estimation optimization method based on big data analysis, which solves the problems in the prior art that the estimation of the maximum Doppler frequency shift value is inaccurate, resulting in a high bit error rate and serious performance deterioration of the entire hardware communication system.

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  • A channel estimation optimization method based on big data analysis
  • A channel estimation optimization method based on big data analysis
  • A channel estimation optimization method based on big data analysis

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Embodiment Construction

[0040] Below in conjunction with the drawings, preferred embodiments of the present invention are given and described in detail.

[0041] The channel estimation optimization method provided by the present invention is applied in OFDM channel estimation, such as figure 2 shown, including:

[0042] In step S1, a channel model is selected according to an actual communication scenario, and a simulation platform is built. For example, if the actual operation scenario of the wireless system is in an urban environment, the ETU channel model provided by 3GPP is used for simulation; if it is in a rural environment, the RA channel model is used for simulation.

[0043] In step S2, on the simulation platform built in step S1, the function relation f(s) of the maximum Doppler frequency shift value is obtained by curve fitting.

[0044] Step S3, using the functional relationship f(s) obtained in step S2 to calculate the real-time maximum Doppler frequency shift value

[0045] Step S4...

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Abstract

The invention relates to a channel estimation optimization method based on big data analysis, comprising: step S1, selecting a channel model, and building a simulation platform; step S2, curve fitting to obtain a functional relationship f(s) of the maximum Doppler frequency shift value ; Step S3, calculate the real-time maximum Doppler frequency shift value Step S4, channel estimation. The invention can track the change of the channel in real time, improve the accuracy of channel estimation, and reduce the bit error rate of the OFDM communication system.

Description

technical field [0001] The present invention relates to the field of wireless communication, and more particularly relates to a channel estimation optimization method based on big data analysis. Background technique [0002] OFDM is the mainstream signal modulation and transmission technology in the current wireless communication physical layer. It decomposes a physically high-speed broadband signal into multiple low-speed parallel narrowband signals. Since the bandwidth of the narrowband signal is smaller than the coherent bandwidth of the wireless channel, the duration of an OFDM symbol is shorter than the coherent time of the channel. [0003] The OFDM symbols of a whole subframe can be decomposed into a time-frequency matrix, such as figure 1 shown. Among them, the horizontal axis is the time axis of the OFDM symbol, and the length of one square represents the duration of one OFDM symbol; the vertical axis is the frequency axis of the OFDM subcarrier, and the width of ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02H04L27/26H04B17/391
CPCH04L25/024H04L27/2695H04B17/3912
Inventor 周斌翟志刚于伟陆犇
Owner SHANGHAI RES CENT FOR WIRELESS TECH