Wireless channel estimation method

A technology of wireless channel and wireless communication, which is applied in the field of channel estimation and wireless communication, can solve the problem of unbalanced calculation complexity and estimation accuracy, and achieve effective and easy-to-use, good mean square error performance and bit error rate performance, and improve The effect of precision

Active Publication Date: 2019-10-01
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

[0005] Aiming at the problem of unbalanced calculation complexity and estimation accuracy in the prior art, the present invention provides a wireless channel estimation method, which utilizes an optimization algorithm to optimize the extreme learning machine neural network, thereby obtaining good mean square error performance and error in channel estimation. Bit rate performance

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Embodiment

[0053] This embodiment provides a wireless channel estimation method based on an optimized extreme learning machine ELM, figure 2 Shown is a schematic flow chart of the wireless channel estimation method based on optimized ELM described in this specific embodiment. like figure 2 As shown, the wireless channel estimation method includes the following steps:

[0054] Step S11 , inserting the pilot and recording the position index, and obtaining the channel frequency response of the position of the wireless communication pilot according to the pilot signals at the transmitting and receiving ends of the wireless communication.

[0055] Further, in the step S11, the channel frequency response estimation formula of the pilot position is:

[0056]

[0057] and Y p Indicates the pilot information of the receiving end, X p Indicates pilot symbol information.

[0058] Step S12, designing a fitness function.

[0059] In this step, the fitness function is designed to train the ...

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Abstract

The invention provides a wireless channel estimation method which is used for solving the problem that in the prior art, the calculation complexity and estimation precision are not balanced. In the wireless channel estimation method, according to pilot signals at the two receiving and transmitting ends in wireless communication, obtaining a channel frequency response of a wireless communication pilot frequency position, and training a neural network of an ELM according to the channel frequency response and a position index, obtaining a training error of CSI, optimizing the number of hidden layer neurons of the ELM by using an optimization algorithm, obtaining an optimal number, and obtaining the CSI by using the trained ELM. According to the channel estimation method, the extreme learningmachine and the optimization algorithm are combined, the optimal hidden layer neuron number of the extreme learning machine is obtained, good mean square error performance and bit error rate performance are obtained in channel estimation, the channel estimation precision is improved, and the channel estimation method is effective and easy to use.

Description

technical field [0001] The invention belongs to the field of wireless communication, specifically relates to the field of channel estimation, in particular to a wireless channel estimation method. Background technique [0002] Communication, as one of the three pillars of human life, is more and more applied to various fields of life and production. The number of users and data volume are increasing exponentially. The new generation of mobile communication technology requires High transmission rate and rich spectrum resources, while ensuring communication quality. [0003] The communication quality of wireless communication largely depends on the accuracy of channel estimation. Channel estimation is the process of estimating the model parameters of an assumed channel model from the received data. To improve the accuracy of channel estimation, an estimation algorithm that minimizes the estimation error is needed. In order to accurately restore the transmitted signal at the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02
CPCH04L25/022H04L25/0224H04L25/0254
Inventor 陈月云苗杰买智源
Owner UNIV OF SCI & TECH BEIJING
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