Channel estimation method, apparatus, and device

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By quantizing ICI power and signal-to-interference-plus-noise ratio to correct channel estimates, the channel estimation bias caused by filter overlap interference in the FBMC/OQAM system is resolved, achieving high-precision and high-reliability channel estimation and improving the system's transmission performance.

CN122348877APending Publication Date: 2026-07-07XIAN UNIV OF POSTS & TELECOMM

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner: XIAN UNIV OF POSTS & TELECOMM
Filing Date: 2026-06-08
Publication Date: 2026-07-07

AI Technical Summary

Technical Problem

Existing channel estimation methods for FBMC/OQAM systems fail to effectively consider the inherent pure imaginary interference caused by filter overlap, resulting in large deviations between the estimation results and the actual channel transmission characteristics, weak anti-interference capabilities, and existing improvement schemes usually require increased computational complexity or changes to the system architecture.

Method used

By quantizing ICI power and calculating subcarrier-level signal-to-interference-plus-noise ratio (SINR), the initial channel estimate is corrected. The inherent pure imaginary interference caused by filter overlap is incorporated. IAM-R type preamble and least squares algorithm are used, combined with SINR threshold and iterative correction, to improve the accuracy and reliability of channel estimation.

Benefits of technology

Without changing the existing system architecture and computational complexity, the accuracy and reliability of channel estimation results are significantly improved, thereby significantly enhancing the transmission reliability of the FBMC/OQAM system.

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Abstract

The application provides a channel estimation method, device and equipment, and relates to the technical field of communication. The method comprises the following steps: determining initial channel estimation values corresponding to each subcarrier according to an IAM-R type preamble and a least square algorithm; determining signal-to-interference-and-noise ratios of each subcarrier according to ICI power corresponding to each subcarrier and noise power; and correcting the initial channel estimation values corresponding to each subcarrier according to the signal-to-interference-and-noise ratios of each subcarrier and a preset threshold to obtain target channel estimation values. The method provided in the application embodiment effectively solves the problems of large IAM-LS channel estimation deviation and weak anti-interference capability of a traditional method, and significantly improves channel estimation precision and transmission reliability of an FBMC / OQAM system.

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