# US 2019/0174330 A1 · Sensing recognition method and device based on wireless communication signals

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- Number: US 2019/0174330 A1
- Document ID: US20190174330A1
- Status: Published application
- Kind: A1
- Application number: 15/847,961
- Filed: 2017-12-20
- Published: 2019-06-06
- Earliest claimed: 2017-12-06
- Assignees: Beijing University of Posts and Telecommunications
- Applicants: Beijing University of Posts & Telecommunications
- Inventors: Xiangming Wen; Lingchao Guo; Zhaoming Lu; Tao Lei; Gang Cao; Zhihong He
- Web page: https://patentgrep.com/patent/US20190174330A1

## CPC

- H04W 24/02: Arrangements for optimising operational condition
- H04B 17/21: for calibration; for correcting measurements
- H04B 17/309: Measuring or estimating channel quality parameters
- H04W 24/08: Testing, {supervising or monitoring} using real traffic
- H04W 84/12: WLAN [Wireless Local Area Networks]
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04B: TRANSMISSION

## Abstract

A sensing recognition method and device based on wireless communication signals are disclosed. The method comprises the steps of obtaining channel state information from a received wireless communication signal; extracting a channel state feature value from the channel state information; and outputting a sensing result mapped with the channel state feature value according to the channel state feature value. The disclosed method and device can improve the accuracy of sensing recognition and achieve better recognition effect.

## Claims

### Claim 1

A sensing recognition method based on wireless communication signals, comprising the steps of:
obtaining channel state information from a received wireless communication signal;
extracting a channel state feature value from the channel state information; and
outputting a sensing result mapped with the channel state feature value according to the channel state feature value.

### Claim 2 (depends on 1)

The sensing recognition method according to claim 1, wherein the wireless communication signal includes a WAPI signal or a WiFi signal transmitted by a wireless router.

### Claim 3 (depends on 1)

The sensing recognition method according to claim 1, wherein the channel state feature value comprises an amplitude feature value and a phase feature value.

### Claim 4 (depends on 3)

The sensing recognition method according to claim 3, wherein before the step of extracting a channel state feature value from the channel state information, the method further comprises the step of:
performing a signal pre-processing on amplitude and phase of the channel state information.

### Claim 5 (depends on 4)

The sensing recognition method according to claim 4, wherein the step of performing a signal preprocessing on amplitude and phase of the channel state information comprises the steps of:
performing a phase calibration on the channel state information by a linear transformation method; and
performing a filtering and amplitude-modulation processing on the channel state information by a Hampel filter and a moving average filter.

### Claim 6 (depends on 51)

The sensing recognition method according to claim 51, wherein before the step of performing a phase calibration on the channel state information by a linear transformation method, the method further comprises the step of:
performing a noise-elimination processing on the channel state information by a low-pass filter.

### Claim 7 (depends on 1)

The sensing recognition method according to claim 1, wherein the step of outputting a sensing result mapped with the channel state feature value according to the channel state feature value comprises the steps of:
inputting the channel state feature value into a preset classifier to obtain a classification label mapped with the channel state feature value; and
outputting a sensing result according to the classification label.

### Claim 8

A sensing recognition device based on wireless communication signals, comprising:
an information obtaining module, configured to obtain channel state information from a received wireless communication signal;
a feature extracting module, configured to extract a channel state feature value from the channel state information obtained by the information obtaining module; and
a sensing outputting module, configured to output a sensing result mapped with the channel state feature value according to the channel state feature value extracted by the feature extracting module.

### Claim 9 (depends on 8)

The sensing recognition device according to claim 8, wherein the sensing recognition device further comprises:
a signal pre-processing module, configured to perform a signal pre-processing on amplitude and phase of the channel state information obtained by the information obtaining module; and
a feature extracting module, configured to extract a channel state feature value from the channel state information performed by the signal preprocessing.

### Claim 10 (depends on 8)

The sensing recognition device according to claim 8, wherein the sensing outputting module comprises:
a classifying sub-module, configured to input the extracted channel state feature value into a preset classifier to obtain a classification label mapped with the channel state feature value; and
an outputting sub-module, configured to output a sensing result according to the classification label obtained by the classification sub-module.