Multipath channel profiling method based on limited bandwidth wi-fi devices

A technology with limited bandwidth and equipment, which is applied in the direction of transmission path sub-channel allocation, channel estimation, baseband system components, etc., to achieve the effects of improving time resolution, good scalability, and accurate decomposition
CN110299982BActive Publication Date: 2020-09-01SHANGHAI JIAO TONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI JIAO TONG UNIV
Publication Date
2020-09-01

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Abstract

A multipath channel side writing method of the Wi-Fi equipment based on limited bandwidth is provided, a data model matched with a multi-signal classification algorithm is designed, after CSI of a plurality of antennas is reconstructed and combined, the multi-signal classification algorithm is adopted to solve the signal arrival time according to the CSI, and energy attenuation and phase change corresponding to signal arrival time are further obtained through a least square method and a Wi-Fi channel model, thereby realizing wireless channel side writing. The method is applied to the CSI-basedarrival time estimation problem by properly modifying the traditional MUSIC algorithm, so that more accurate multi-path channel side writing is provided. CSI information provided by the Wi-Fi equipment with limited bandwidth is used for accurately describing the wireless multi-path channel in detail, so that the problem of how to obtain accurate wireless multi-path channel side writing by using the narrow bandwidth Wi-Fi equipment under condition of not increasing redundant communication burden is solved.
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Description

technical field

[0001] The invention relates to a technology in the field of wireless communication, in particular to a multi-path channel profile (WiZoom) method based on a Wi-Fi device with limited bandwidth. Background technique

[0002] Channel state information (CSI) is the main basis for Wi-Fi devices to perform channel equalization. It is essentially an estimation result of the frequency response of wireless multipath channels, so it contains important information related to channel multipath components. . Because the change of the multipath channel directly reflects the change of the propagation path caused by the spatial change, CSI is also widely used in wireless intelligent sensing and indoor positioning. Multipath channel profiling is a specific description of the multipath channel propagation path, including the arrival time, energy attenuation and phase change of each path. Among them, the arrival time is the most critical, and the energy attenuation and phase...

Claims

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