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LTE downlink channel estimation method suitable for complex environment

A channel estimation and complex environment technology, which is applied in the direction of transmission path sub-channel allocation, pilot signal allocation, transmission path separation device, etc., can solve the problems of complex calculation, error equalization effect, slow channel estimation and tracking speed, etc., and achieve improvement The effect of signal-to-noise ratio, improved estimation speed, and small amount of calculation

Active Publication Date: 2019-04-23
成都唯创华盛科技有限公司
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Problems solved by technology

[0006] The channel change speed is related to the channel environment between the base station and the mobile phone. For example, when the mobile phone is moving at a high speed, the channel change speed is fast. If the channel change is not tracked, the channel estimation result may lead to a wrong equalization effect.
[0007] (2) Noise factor
The advantage of this method is that the estimation is accurate, but the calculation is complicated, and the channel estimation and tracking speed is slow

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  • LTE downlink channel estimation method suitable for complex environment
  • LTE downlink channel estimation method suitable for complex environment
  • LTE downlink channel estimation method suitable for complex environment

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[0049] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0050] The LTE downlink channel estimation method suitable for complex environments described in the present invention solves the problem of accuracy and high efficiency of LTE downlink channel estimation in complex environments, and adopts LS fast estimation, small-scale smooth estimation and linear two-dimensional The interpolation algorithm achieves a good estimation effect, effectively reduces the noise, and ensures high efficiency at the same time.

[0051]Specifically, a method for estimating an LTE downlink channel suitable for complex environments includes the following steps:

[0052] A. Preliminary estimation of the pilot channel;

[0053] Using the known CRS signal of the LTE cell, the LS (Least Square) algorithm is used to obtain a preliminary estimate of the pilot channel;

[0054] The preliminary estimation of the pilot channel includes ...

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Abstract

The invention discloses an LTE downlink channel estimation method suitable for a complex environment, which can solve the problems of accuracy and efficiency of LTE downlink channel estimation in thecomplex environment. The LTE downlink channel estimation method suitable for the complex environment comprises the steps of A, preliminary estimation of a pilot channel; B, small-range smoothing of pilot frequency estimation; and C, two-dimensional linear interpolation. By adopting the LTE downlink channel estimation method suitable for the complex environment, accurate channel estimation and noise suppression can be realized; and efficient estimation can be achieved, and fast channel change conditions can be adapted.

Description

technical field [0001] The invention relates to the technical field of wireless signal communication, in particular to an LTE downlink channel estimation method suitable for complex environments. Background technique [0002] Known: LTE (Long Term Evolutionng technology has rapidly improved the wireless transmission rate of mobile communication, and has played a major role in the development of various fields. LTE has a transmission rate of 100Msps, occupies a bandwidth within the range of 1.4M to 20M, and adopts OFDM (Orthogonal Frequency Division Multiplexing) multiple access technology. Due to the wide frequency band sent, the data after OFDM demodulation needs to be equalized, so channel estimation must be performed. The efficiency and accuracy of channel estimation algorithms and adaptability to various complex radio The ability of the environment to propagate waves is critical. [0003] In the present invention, the content of channel estimation mainly refers to estim...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04L25/02H04L5/00
CPCH04L5/0008H04L5/0048H04L25/0256H04L27/2695
Inventor 王巍王远建杨波谢瑞雯杨世铖
Owner 成都唯创华盛科技有限公司
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