Wireless signal transmitting and receiving device and wireless signal processing method
By designing a wireless signal transceiver device and filtering the channel state information using frequency domain signal processing technology, the problem of degradation of accuracy caused by unnecessary information in wireless signal transmission is solved, and more efficient channel state information processing and judgment is achieved.
Patent Information
- Application Number
- CN202311336782.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-10-16
- Publication Date
- 2025-04-18
AI Technical Summary
During the transmission process, due to the influence of human bodies or objects in the environment, the channel status information contains too much unnecessary information, resulting in a decrease in accuracy.
A wireless signal transceiver and receiving device is designed, including a receiving unit, a conversion module, an estimation module, a processing unit and a storage unit. By converting the wireless signal into a frequency domain signal, estimating and filtering the channel state information is performed to obtain the second channel state information, reducing the reception of unnecessary information.
By filtering out channel state sub-information outside the time interval, the unnecessary amount of information in the wireless signal is reduced, and the accuracy and judgment efficiency of channel state information are improved.
Smart Images
Figure CN119853751A_ABST
Abstract
Description
Technical Field
[0001] This case is related to the field of wireless communication, especially a wireless signal transceiver and a wireless signal processing method based on physiological state detection. Background Art
[0002] In the process of sending and receiving wireless signals, human bodies or objects in the environment will cause reflection, penetration, scattering and other effects on wireless signals, causing wireless signals to be transmitted to the receiving end through multiple paths. After receiving the wireless signal, the receiving end will perform channel estimation and obtain channel state information (CSI). Based on the channel state information, the system can estimate the path and state that the wireless signal has experienced during the transmission process.
[0003] Generally speaking, the receiving end will completely receive each wireless signal coming from different paths, causing the channel state information in the wireless signal to carry too much unnecessary information, making it easy to extract erroneous channel state information in the subsequent application of the channel state information, resulting in a decrease in accuracy. Summary of the invention
[0004] In view of the above, a wireless signal transceiver is provided. In one embodiment, the wireless signal transceiver includes a receiving unit, a conversion module, an estimation module, a processing unit and a storage unit. The receiving unit is used to receive a wireless signal. The conversion module is electrically connected to the receiving unit, and the conversion module is used to convert the wireless signal into a frequency domain signal. The estimation module is electrically connected to the conversion module, and the estimation module is used to estimate the frequency domain signal to obtain a first channel state information, and the first channel state information includes a plurality of channel state sub-information. The processing unit is electrically connected to the estimation module, and the processing unit is used to filter the first channel state information to obtain a second channel state information. The storage unit is electrically connected to the processing unit, and the storage unit is used to store the second channel state information.
[0005] In one embodiment, the processing unit filters out the channel status sub-information outside a time interval from the first channel status information to obtain the second channel status information.
[0006] In one embodiment, the processing unit obtains equivalent frequency domain information according to the time interval, and then uses the equivalent frequency domain information to filter out the channel state sub-information outside the time interval from the first channel state information.
[0007] A wireless signal processing method based on physiological state detection is also provided. In one embodiment, the wireless signal processing method is executed by a processing circuit, including converting a wireless signal received by a receiving unit into a frequency domain signal. The frequency domain signal is estimated to obtain a first channel state information, and the first channel state information includes a plurality of channel state sub-information. The first channel state information is filtered to obtain a second channel state information.
[0008] The detailed features and advantages of the present invention are described in detail in the following implementation mode, and the content is sufficient to enable any technical personnel in this field to understand the technical content of the present invention and implement it accordingly. Moreover, according to the content disclosed in this specification, the claims and the drawings, any technical personnel in this field can easily understand the relevant purposes and advantages of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 FIG. 4 is a schematic diagram showing the connection of various components in the wireless signal transceiver device of the present invention in some embodiments.
[0010] Figure 2 A flow chart of the wireless signal processing method of the present invention is shown in some embodiments.
[0011] Figure 3 A schematic diagram of filtering out channel status sub-information in some embodiments is shown.
[0012] Figure 4 A schematic diagram illustrating how a processing unit obtains equivalent frequency domain information using time domain information of a time interval in some embodiments. DETAILED DESCRIPTION
[0013] See also Figure 1 As shown, the present invention relates to a wireless signal transceiver device, which includes a receiving unit 10, a conversion module 20, an estimation module 30, a processing unit 40 and a storage unit 50. The implementation of the above-mentioned components is introduced below.
[0014] See also Figure 1 and Figure 2 As shown, the receiving unit 10 is used to receive a wireless signal. In some embodiments, the receiving unit 10 is a wifi signal receiver, and the wireless signal is a wifi signal.
[0015] See also Figure 1 ,and Figure 2 As shown, the conversion module 20 is electrically connected to the receiving unit 10, and the conversion module 20 is used to convert the wireless signal into a frequency domain signal (i.e., step S01). In some embodiments, the conversion module 20 converts the wireless signal into a frequency domain signal by Fourier transform. In some embodiments, the conversion module 20 is specifically a processor.
[0016] See also Figure 1 , Figure 2 and Figure 3 (a) to Figure 3 As shown in (c), the estimation module 30 is electrically connected to the conversion module 20. The estimation module 30 is used to estimate the frequency domain signal to obtain a first channel state information (CSI), and the first channel state information includes a plurality of channel state sub-information 60 (ie, step S02). Figure 3 (a) is an equivalent schematic diagram of presenting the first channel state information in the frequency domain with frequency and channel frequency response. In some embodiments, the estimation module 30 performs channel estimation on the frequency domain signal using the least square method (LS) or channel smoothing. In some embodiments, the channel state sub-information 60 is the channel state information of the wireless signal received by the receiving unit 10 through different paths. In some embodiments, the estimation module 30 is specifically a processor.
[0017] See also Figure 1 , Figure 2 and Figure 3 (a) to Figure 3 As shown in (c), the processing unit 40 is electrically connected to the estimation module 30. The processing unit 40 is used to filter the first channel state information to filter out unnecessary channel state sub-information 60 to obtain a second channel state information (ie, step S03). In some embodiments, the processing unit 40 is specifically a processor.
[0018] See also Figure 1 As shown, the storage unit 50 is electrically connected to the processing unit 40, and the processing unit 40 stores the second channel status information in the storage unit 50 after obtaining it. In some embodiments, the storage unit is a buffer. In some embodiments, the second channel status information stored in the storage unit 50 is used to determine the human body state, such as fall detection, breathing monitoring, motion recognition, user recognition, and positioning.
[0019] See also Figure 1 As shown, in some embodiments, the wireless signal transceiver device includes a demodulation module 80. After obtaining the first channel state information, the estimation module 30 can transmit the first channel state information to the demodulation module 80 and the processing unit 40 respectively, so that the demodulation module 80 demodulates the first channel state information to obtain detailed channel state information.
[0020] When channel status information is used to judge environmental changes, such as fall detection, breathing monitoring, motion recognition, user recognition, positioning, etc., according to different application scenarios, the signal reception and transmission only needs to have information about the detection target within a limited range, so the channel information at the end of the channel pulse response (i.e., the channel status sub-information 60B outside a time interval in the first channel status information) can be ignored, and environmental changes can be judged only based on the channel pulse response within the time interval (i.e., the second channel status information). Therefore, in this case, by filtering out part of the channel status sub-information 60B without passing through the time domain-frequency domain, the second channel status information can be used to reduce the reception of unnecessary information and improve the judgment efficiency when it is used to judge environmental changes.
[0021] See also Figure 3 (b) Figure 3 As shown in (c), Figure 3 (b) is a schematic diagram assuming that the first channel state information is additionally converted from the frequency domain to the time domain through IFFT. The channel state sub-information 60B outside the time interval is regarded as external interference, such as wireless signals from other signal transmitters, or wireless signals are affected by multiple environments (such as reflections) during transmission. Therefore, the remaining channel state sub-information 60A after filtering it out is used as the second channel state information (such as Figure 3 (c)), and then convert between the time domain and the frequency domain to improve the efficiency of other components in analyzing the second channel state information. However, the disadvantage of this method is that the channel state information needs to be converted from the frequency domain to the time domain during the process, and then converted from the time domain to the frequency domain after deleting the external interference information. In this case, the unnecessary channel state sub-information 60B can be deleted without the first channel state information passing through the time domain-frequency domain. The obtained second channel state information can be equivalent to Figure 3 (c) shows the second channel state information after time domain-frequency domain conversion.
[0022] See also Figure 4 (a) Figure 4 As shown in (b), in some embodiments, the first channel information state is filtered out of the channel state sub-information 60B outside the time interval, and the processing unit 40 uses the time domain information f(t) of the time interval to obtain the equivalent frequency domain information f(w), and then processes the first channel state information with the equivalent frequency domain information f(w) to filter out interference. This method is equivalent to the first channel information state in the time domain (such as Figure 3 (b)), the channel status sub-information 60B outside the time interval is filtered out and the channel status sub-information 60A is retained, thereby obtaining the second channel status information (such as Figure 3 (c)), where Figure 3(c) presents the second channel state information in the time domain. In this way, the first channel state information does not need to be converted from the frequency domain state to the time domain state to filter out the channel state sub-information 60B outside the time interval and then converted back to the frequency domain state. The above method can be used to directly filter out the channel state sub-information 60B outside the time interval in the frequency domain state, thereby improving the overall processing efficiency while achieving the same interference elimination effect.
[0023] In some embodiments, the equivalent frequency domain information f(w) is used to obtain the equivalent frequency domain information f(t) to filter out the channel state sub-information 60B outside the time interval of the first channel state information, by multiplying the equivalent frequency domain information f(w) by the first channel state information. In some embodiments, the length of the time interval is related to the parameters of the filter (such as a smoothing filter) selected for the first channel state information, or the length of the time interval is determined according to the spatial range of the detection location.
[0024] In some embodiments, physiological state detection can be applied to any two wireless network devices, wherein the signal receiving end is a receiving unit 10, and a wireless network signal is sent through another wireless device, and the human body is located between the sending unit and the receiving unit 10, so that the wireless signal will produce a change in channel state information when passing through the human body, so that the user can obtain the channel information reported by the wireless network device and then perform the detection application by himself, so as to judge the physiological state of the human body according to the channel state information, and obtain a physiological state information. For example, when a human body lies horizontally between the sending unit and the receiving unit 10, when the sending unit sends a wireless signal and passes through the human body, the channel state information of the wireless signal will be affected by the rise and fall of the chest when the human body breathes. After the processing unit 40 eliminates interference with the original channel information, it reports the channel information to the user end, and the user judges the breathing state of the human body by analyzing the channel state information. In some embodiments, the sending unit is specifically a wifi signal transmitter.
[0025] Through the above detailed description, it can be fully demonstrated that the purpose and efficacy of some embodiments of this creation are progressive and have great industrial utilization value, which fully meets the patent requirements, so an application is filed in accordance with the law. However, the above is only a preferred embodiment of this creation, and it should not be used to limit the scope of implementation of this creation. That is, all equivalent changes and modifications made according to the claims of this creation should fall within the scope of the patent coverage of some embodiments of this creation. I would like to ask the review committee to understand and approve it. This is my prayer.
[0026]
Explanation of symbols
[0027] 10: Receiving unit
[0028] 20:Conversion module
[0029] 30: Estimation module
[0030] 40: Processing unit
[0031] 50: Storage unit
[0032] 60: Channel status sub-information
[0033] 60A: Channel status sub-information
[0034] 60B: Channel status sub-information
[0035] 80: Demodulation module
[0036] f(t): time domain information
[0037] f(w): equivalent frequency domain information
[0038] S01~S03: steps.
Claims
1. A wireless signal transceiver, comprising: a receiving unit, configured to receive a wireless signal; a conversion module, electrically connected to the receiving unit, and configured to convert the wireless signal into a frequency domain signal; an estimation module, electrically connected to the conversion module, and configured to estimate the frequency domain signal to obtain first channel state information, wherein the first channel state information includes a plurality of channel state sub-information; a processing unit, electrically connected to the estimation module, and configured to filter the first channel state information to obtain a second channel state information; and A storage unit is electrically connected to the processing unit and is used to store the second channel status information.
2. The wireless signal transceiver according to claim 1, wherein: The processing unit filters out the channel status sub-information outside a time interval from the first channel status information to obtain the second channel status information.
3. The wireless signal transceiver according to claim 2, wherein: The processing unit obtains equivalent frequency domain information from time domain information of the time interval, and then uses the equivalent frequency domain information to filter out the channel state sub-information outside the time interval from the first channel state information.
4. A wireless signal processing method, performed by a processing circuit, comprising: Converting a wireless signal received by a receiving unit into a frequency domain signal; estimating the frequency domain signal to obtain first channel state information, where the first channel state information includes a plurality of channel state sub-information; and The first channel status information is filtered to obtain second channel status information.
5. The wireless signal processing method according to claim 4, wherein: In the step of obtaining the second channel status information, the channel status sub-information outside a time interval is filtered out from the first channel status information to obtain the second channel status information.
6. The wireless signal processing method according to claim 5, wherein: In the step of obtaining the second channel status information, an equivalent frequency domain information is obtained by using the time domain information of the time interval, and then the equivalent frequency domain information is used to filter out the channel status sub-information outside the time interval from the first channel status information.