Parameter estimation method and system for cross-field ultrahigh frequency wireless channel

By constructing a single-input multiple-output (SIMO) cross-field model and combining it with the Bayesian information criterion, the deviation problem of ultra-high frequency terahertz channel parameter estimation methods in near-field and far-field coexistence environments is solved, and the accurate differentiation and parameter estimation of multipath components are achieved, thereby improving the reliability of the channel model and the accuracy of parameter estimation.

CN121841906APending Publication Date: 2026-04-10SHANDONG UNIV
0 Cites 0 Cited by

Patent Information

Application Number
CN202610060966.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-16
Publication Date
2026-04-10

AI Technical Summary

Technical Problem

Existing UHF terahertz channel parameter estimation methods cannot adapt to cross-field propagation environments where near-field and far-field coexist, resulting in excessive parameter estimation deviations or failures, making it difficult to meet the reliable operation requirements of UHF terahertz communication systems.

Method used

By capturing channel response data and eliminating equipment interference, a single-input multiple-output (SIMO) cross-field model is constructed. The channel transfer function (CTF) is decomposed into the superposition of near-field and far-field multipath components. Initial parameters are extracted using the maximum likelihood criterion and the narrowband far-field assumption. The multipath component category is determined by the Bayesian information criterion. Finally, the parameter estimation is performed using an adaptive model.

Benefits of technology

It achieves accurate differentiation and parameter calculation of multipath components across fields, significantly reduces estimation bias, improves the reliability of channel models, and provides key support for the stable operation of ultra-high frequency terahertz communication systems.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention provides a parameter estimation method and system for a cross-field ultrahigh-frequency wireless channel, and belongs to the field of wireless communication, and the method comprises the steps: constructing an ultrahigh-frequency terahertz channel measurement system, and obtaining a channel transmission function; establishing a cross-field domain channel signal model; executing a cross-field domain parameter estimation and optimization process by adopting a parameter estimation algorithm based on a maximum likelihood criterion; and carrying out channel characterization and analysis based on the estimation parameters. According to the method, near-field and far-field multipath components are intelligently distinguished by introducing the Bayesian information criterion, parameter estimation is performed by adopting the spherical wavefront model and the plane wavefront model respectively, and the problem of estimation deviation caused by neglecting a near-field effect and spatial non-stationarity in a traditional algorithm is effectively solved by combining iterative optimization and visible region modeling. According to the method, the nonlinear phase change, the multipath birth and death phenomenon and the frequency domain characteristic in the ultrahigh-frequency multi-antenna channel can be accurately captured, the parameter estimation precision and the residual performance are remarkably improved, and a key technical support and an experimental basis are provided for channel modeling, large-scale antenna array design and perception communication integration of a 6G ultrahigh-frequency terahertz communication system.
Need to check novelty before this filing date? Find Prior Art