Channel state information-based wireless localization by signal reconstruction

IF 2.3 4区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

EURASIP Journal on Wireless Communications and Networking Pub Date : 2023-11-06 DOI:10.1186/s13638-023-02303-x

Yunbing Hu, Ao Peng, Shenghong Li, Biyu Tang, Wei Ni, Xianzhi Lu, Jianguo Tang

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Abstract

Abstract Wireless localization technology has been widely used in indoor and outdoor fields. Channel estimation based on channel state information is a hot research topic in recent years. However, due to the interference of acquisition bandwidth, noise and Doppler effect, high-resolution channel estimation is a difficult problem. In this paper, the least squares estimate the amplitude of the signal subspace projection and estimate the time delay, using wireless channel state information to delay obey exponential distribution and magnitude obey normal distribution features, and reconstruction after the signal space and sampling to the Euclidean distance between the signal space, common as gradient optimization parameters, estimate the arrival time delay of high precision. The algorithm proposed in this paper filters out the noise interference in wireless communication and improves the accuracy of channel estimation through the method of least square and gradient optimization, which provides a feasible scheme for indoor wireless localization.

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基于信道状态信息的信号重构无线定位

摘要无线定位技术已广泛应用于室内和室外领域。基于信道状态信息的信道估计是近年来的研究热点。然而，由于采集带宽、噪声和多普勒效应的干扰，高分辨率信道估计是一个难题。本文采用最小二乘估计信号的幅值投影子空间并估计时延，利用无线信道状态信息使时延服从指数分布和幅值服从正态分布的特征，并将重构后的信号空间和采样到的信号空间之间的欧氏距离，共同作为梯度优化参数，估计了高精度的到达时延。本文提出的算法通过最小二乘法和梯度优化方法滤除无线通信中的噪声干扰，提高信道估计的精度，为室内无线定位提供了一种可行的方案。

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来源期刊

EURASIP Journal on Wireless Communications and Networking 工程技术-电信学

CiteScore

7.70

自引率

3.80%

发文量

109

审稿时长

8.0 months

期刊介绍： The overall aim of the EURASIP Journal on Wireless Communications and Networking (EURASIP JWCN) is to bring together science and applications of wireless communications and networking technologies with emphasis on signal processing techniques and tools. It is directed at both practicing engineers and academic researchers. EURASIP Journal on Wireless Communications and Networking will highlight the continued growth and new challenges in wireless technology, for both application development and basic research. Articles should emphasize original results relating to the theory and/or applications of wireless communications and networking. Review articles, especially those emphasizing multidisciplinary views of communications and networking, are also welcome. EURASIP Journal on Wireless Communications and Networking employs a paperless, electronic submission and evaluation system to promote a rapid turnaround in the peer-review process. The journal is an Open Access journal since 2004.