CSI-based human body activity data detection method and apparatus and electronic device

Abstract

The embodiment of the invention discloses a CSI-based human body activity data detection method and apparatus and an electronic device. The CSI-based human body activity data detection method comprises the steps of obtaining the original CSI data of multiple paths of received signals received by a Wi-Fi signal receiving device, wherein the received signals at least comprise the reflected signals generated by the human body activities in the propagation process of the transmitted signals transmitted by a Wi-Fi signal transmitting device, and each path of received signals comprises N subcarriers; acquiring the first target CSI data of a first path of received signals and a second path of received signals based on the original CSI data of the multiple paths of received signals; preprocessingthe first target CSI data of the two paths of received signals to obtain the second target CSI data of the two paths of received signals; and based on the second-order differential phase of the secondtarget CSI data of the two paths of received signals, determining the starting time and / or the ending time of the human body activity. Therefore, a tedious calculation process is avoided, and a detection result is rapidly obtained.

Description

technical field [0001] The present disclosure relates to the field of communication technologies, and in particular to a method, device and electronic equipment for detecting human body activity data based on CSI. Background technique [0002] With the development of wireless communication technology, human body sensing has been widely used in indoor positioning, personnel intrusion detection, home medical monitoring, and new human-computer interaction interfaces. Common human body sensing methods are based on vision, sensors or Wi-Fi, etc. . Among them, the Wi-Fi-based human body sensing method is widely used because of its non-invasiveness, and the main signal features used include Received Signal Strength Indicator (RSSI) and Channel State Information (CSI) . Compared with RSSI, CSI contains richer multipath information, which provides higher accuracy and resolution for human perception. [0003] In the human body perception system, it is usually necessary to judge the...

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Problems solved by technology

The above-mentioned prior art has at least the following defects: the calculation method is complex, resulting in a long time to obtain the test results; and it is easy to misjudgment the initial small movements of the human body, resulting in low accuracy of the judgment results of the detection of the starting point and end point of human activities, and the perception effect is not high. poor

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