Method for improving WiFi through-wall performance radio frequency

Abstract

The invention discloses a method for improving WiFi through-wall performance radio frequency, which comprises a main control chip and a WiFi chip electrically connected with the main control chip; an FEM chip (a front-End Module abbreviation, a radio frequency front end module), the FEM chip being in communication connection with the WiFi chip through a first matching network; the antenna is in communication connection with the FEM chip through a second matching network; and the camera is electrically connected with the main control chip. According to the application, the transmitting power and the receiving sensitivity can be improved by adding the FEM chip outside the WiFi chip, and the external FEM chip is turned on or turned off in real time through signal detection, so that the pull distance and the signal quality after wall penetration are improved, and the consumption of the electric quantity of the battery can be controlled.

Description

Technical Field

[0001] This application belongs to the field of radio frequency technology, specifically relating to a method for improving the radio frequency performance of WiFi through walls. Background Technology

[0002] When outdoor low-power cameras connect to an indoor router via WiFi, signal quality deteriorates significantly due to distance, co-channel interference, and wall penetration, leading to decreased WiFi throughput, video stream latency, and stuttering. For example, with current technology, after a camera's WiFi connection to an indoor access point (AP), it is typically installed in a fixed outdoor location. Due to varying user scenarios, the distance between the camera and the AP can differ, and wall penetration also plays a role. Existing WiFi chips have a maximum transmission power of around 20dBm, limiting their effectiveness in terms of distance and wall penetration. Generally, after passing through two walls, significant video stream latency or stuttering occurs at a certain distance outside a door. Therefore, wireless WiFi cameras experience severe signal attenuation at a certain distance from the indoor router or after penetrating walls.

[0003] The invention, disclosed in patent CN113422617A, entitled "A Portable WiFi and Antenna Power Adjustment Method," comprises a SIM card module, a router processor, a WiFi chip, a WiFi antenna, and a power supply module. It also includes an MCU module, a signal amplification module, a signal strength detection module, and a button module. The data transceiver of the router processor is connected to the data transceiver of the WiFi chip; the signal transceiver of the WiFi chip is connected to the input of the signal amplification module; and the output of the signal amplification module is connected to the WiFi antenna. The control signal output of the MCU module is connected to the control signal input of the signal amplification module; the input of the signal strength detection module is connected to the input of the WiFi antenna; and the output of the signal strength detection module is connected to the signal sampling port of the MCU module. This WiFi device automatically adjusts the WiFi antenna's transmission power based on distance when in power-saving mode, intelligently regulating power consumption. However, it does not fundamentally solve the technical problem of severe signal attenuation of the wireless WiFi camera at a certain distance from the indoor router or after passing through walls. Summary of the Invention

[0004] To address the shortcomings or deficiencies of the existing technology, this application aims to provide a method for improving the radio frequency (RF) performance of WiFi through walls. This method involves adding an external FEM chip to the WiFi chip to increase transmit power and receive sensitivity. Furthermore, by using signal detection to turn the external FEM chip on or off in real time, the transmission distance and signal quality after wall penetration are improved. It also helps control battery consumption.

[0005] To solve the above-mentioned technical problems, this application provides the following technical solution:

[0006] This application proposes a method for improving the radio frequency (RF) performance of WiFi through walls, including:

[0007] Main control chip,

[0008] The WiFi chip is electrically connected to the main control chip;

[0009] The FEM chip (short for Front-End Module) and the WiFi chip are connected via a first matching network.

[0010] The antenna is communicatively connected to the FEM chip via a second matching network;

[0011] The camera is electrically connected to the main control chip.

[0012] Further optionally, the FEM chip has three operating states:

[0013] In TXENmode, the FEM chip is only in the transmit state, the PA is working, and the transmit power is enhanced;

[0014] In RXENmode, the FEM chip is only in receive mode, and the LNA (Low Noise Amplifier) ​​is working to enhance the receive sensitivity.

[0015] In Bypass mode, the FEM chip is in pass-through mode and is not working.

[0016] Further optionally, the WiFi chip determines the signal quality by scanning the RSSI value of the AP in real time;

[0017] When the RSSI 1 value is excellent, the WiFi chip reduces its own transmission power;

[0018] When the RSSI 2 value is good, the control logic selects the FEM chip to be in Bypass mode;

[0019] When the RSSI 3 value is poor, the WiFi chip controls the FEM chip to enable, and the FEM chip can switch between TXENmode and RXENmode in real time through time-sharing operation to increase the transmission power or the receiving sensitivity, thereby improving the WiFi signal and throughput.

[0020] Further optionally, when the RSSI 1 value is excellent, the RSSI 1 value includes: greater than -50 dBm;

[0021] When the RSSI 2 value is considered good, the RSSI 2 value includes: less than -50dBm and greater than -60dBm;

[0022] When the RSSI 3 value is poor, the RSSI 3 value includes: less than -60 dBm.

[0023] Further optionally, when the RSSI 1 value is excellent, the FEM chip is in Bypass mode and the WiFi chip reduces its own transmission power.

[0024] Compared with the prior art, this application has the following technical effects:

[0025] This application can improve the transmission power and receiving sensitivity by adding an external FEM chip to the WiFi chip, and improve the signal quality after passing through walls by turning the external FEM chip on or off in real time through signal detection, and can also control the battery power consumption.

[0026] This application uses the WiFi chip to scan the AP RSSI value to determine signal quality, resulting in differences in the final output power of the WiFi. When the RSSI signal is good, the power consumption is saved by reducing the transmission power. When the RSSI value is good, the FEM chip is in bypass mode, and only the WiFi chip works normally. When the RSSI value is poor, the FEM chip enables TXEN, which increases the transmission power by 6-7dB, improves the WiFi wall penetration and range extension capabilities, increases WiFi throughput, and effectively improves video stream latency and stuttering. Attached Figure Description

[0027] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0028] Figure 1 This application includes a flowchart illustrating a method for improving the wall-penetrating performance of WiFi radio frequency according to an embodiment.

[0029] Figure 2 : An internal structure diagram of the FEM chip in one embodiment of this application;

[0030] Figure 3 This application presents a schematic diagram illustrating the working principle of a method for improving the wall-penetrating performance of WiFi.

[0031] Figure label:

[0032] 01-Main control chip;

[0033] 02-WiFi chip;

[0034] 03-First Matching Network;

[0035] 04-FEM chip;

[0036] 05-Second Matching Network;

[0037] 06-Antenna

[0038] 07-Camera. Detailed Implementation

[0039] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0040] like Figure 1 As shown, in one embodiment of this application, a method for improving the radio frequency (RF) performance of WiFi through walls includes:

[0041] Main control chip 01,

[0042] WiFi chip 02 is electrically connected to the main control chip 01;

[0043] FEM chip 04 (abbreviation for Front-End Module) is connected to WiFi chip 02 via a first matching network 03.

[0044] Antenna 06, which is communicatively connected to FEM chip 04 through second matching network 05;

[0045] Camera 07 is electrically connected to the main control chip 01.

[0046] In this embodiment, we propose a technical solution by adding an FEM chip 04 (front-end module chip) outside the WiFi chip 02 to systematically solve the performance bottleneck of traditional WiFi modules in complex environments. As a key front-end component for wireless communication, the FEM chip 04 integrates core units such as a PA (power amplifier), LNA (low-noise amplifier), and RF switches. Its core function is to simultaneously improve the communication performance of the WiFi module from both the transmission and reception dimensions through professional signal amplification and noise suppression capabilities.

[0047] From the transmitter's perspective, the PA (Power Amplifier) ​​in the FEM chip 04 effectively amplifies the RF signal power output by the WiFi chip 02. In traditional solutions, the transmit power of the WiFi chip 02 itself is often limited by chip size and power consumption design, making it difficult to meet the signal coverage requirements for long-distance transmission or environments with complex obstacles. However, the external PA unit of the FEM chip 04 can boost the transmit power to a higher level (the specific boost can be adjusted by 10dBm-20dBm through hardware parameter configuration according to the actual application scenario), significantly enhancing the signal's penetration ability and coverage range, especially in home and office environments with multiple walls, effectively reducing signal attenuation.

[0048] From the receiver's perspective, the LNA (Low Noise Amplifier) ​​integrated into the FEM chip focuses on optimizing weak signal reception performance. When the WiFi module is at the edge of signal coverage or subject to external electromagnetic interference, the received signal is often accompanied by a large amount of noise, which can easily lead to data transmission packet loss and increased latency. The LNA unit can accurately amplify weak received signals with an extremely low self-noise figure (typically controllable below 1dB), significantly improving the WiFi module's receiving sensitivity and maintaining a stable communication connection even at long distances or in scenarios with weak signals.

[0049] To further achieve a balance between performance and power consumption, this embodiment innovatively introduces a dynamic signal detection and control mechanism. The system monitors the current communication status of the WiFi module in real time, including key parameters such as signal strength, data transmission rate, and number of connected devices. When a weak signal is detected (e.g., below -80dBm), high data transmission demand (e.g., 4K video streaming), or a large number of connected devices, the system automatically activates the PA and LNA units of the external FEM chip 04 to ensure communication performance in full-power mode. This effectively improves the signal range (by 30%-50% in open environments compared to traditional solutions) and signal quality after passing through walls (by 20%-30% reduction in signal attenuation after passing through walls). Conversely, when a good signal is detected (e.g., above -60dBm), low data transmission volume (e.g., only text chat or web browsing), or no devices are connected, the system automatically shuts down the PA and LNA units of the FEM chip 04, relying solely on the basic communication capabilities of the WiFi chip 02 to maintain the connection. This minimizes unnecessary power consumption and extends the device's battery life (by 15%-25% in everyday use).

[0050] Furthermore, at the hardware design level, the connection between the external FEM chip 04 and the WiFi chip 02 adopts a high-precision RF impedance matching design, which can effectively reduce signal reflection and loss during transmission, ensuring that the amplification efficiency of the PA and the receiving performance of the LNA are fully utilized. At the same time, the overvoltage and overcurrent protection mechanisms built into the FEM chip 04 can also provide additional protection for the stable operation of the WiFi module, avoiding hardware damage caused by voltage fluctuations or abnormal current, and further improving the reliability and service life of the entire system.

[0051] Currently, after a camera's WiFi connects to an indoor access point (AP), it is installed in a fixed outdoor location. Due to varying user scenarios, the distance between the camera and the AP (router) can differ, and there is also the issue of wall penetration. Existing WiFi chips (02) have a maximum transmission power of around 20dBm, limiting their range and wall penetration capabilities. Generally, after passing through two walls, significant video stream delays or stuttering occur at a certain distance outside a door. Therefore, this embodiment adds the FEM chip (04), which has three operating states (see reference). Figure 2 As shown), they are:

[0052] In TXENmode, the FEM chip 04 is only in the transmit state, the PA is working, and the transmit power is enhanced;

[0053] In RXENmode, the FEM chip 04 is only in receiving mode, and the LNA (Low Noise Amplifier) ​​is working to enhance the receiving sensitivity.

[0054] In Bypass mode, the FEM chip 04 is in bypass mode and is not working.

[0055] Furthermore, in this embodiment, the WiFi chip 02 determines the signal quality by scanning the RSSI value of the AP in real time, thereby dynamically adjusting the transmission power;

[0056] For example, when the RSSI 1 value is excellent, the WiFi chip 02 reduces its own transmission power by xdBm; further, when the RSSI 1 value is excellent, the FEM chip 04 is in bypass mode and the WiFi chip 02 reduces its own transmission power.

[0057] When the RSSI 2 value is good, the control logic selects the FEM chip 04 to be in Bypass mode;

[0058] When the RSSI 3 value is poor, the WiFi chip 02 controls the FEM chip 04 to enable, and the FEM chip 04 can switch between TXEN mode and RXEN mode in real time through time-division multiplexing to increase the transmit power (up to 28dBm, a 40% performance increase) or the receive sensitivity (up to 3dBm), thereby improving the WiFi signal and throughput.

[0059] In one embodiment of this application, different reference values ​​can be assigned to the RSSI 1 value, RSSI 2 value, and RSSI 3 value, as follows:

[0060] When the RSSI 1 value is excellent, the RSSI 1 value includes: greater than -50 dBm;

[0061] When the RSSI 2 value is considered good, the RSSI 2 value includes: less than -50dBm and greater than -60dBm;

[0062] When the RSSI 3 value is poor, the RSSI 3 value includes: less than -60 dBm.

[0063] The RSSI 1, RSSI 2, and RSSI 3 values ​​mentioned above are for illustrative purposes only, and may be adjusted according to actual circumstances during implementation.

[0064] This application improves transmit power and receive sensitivity by adding an external FEM chip to the WiFi chip. It also improves signal quality after wall penetration by enabling or disabling the external FEM chip in real time through signal detection, and controls battery consumption. This application uses the WiFi chip to scan the AP RSSI value to determine signal quality, creating variations in the final WiFi output power. When the RSSI signal is good, the transmit power is reduced to save power. When the RSSI value is good, the FEM chip is in bypass mode, and only the WiFi chip operates normally. When the RSSI value is poor, the FEM chip activates TXEN, increasing the transmit power by 6-7dB, improving WiFi wall penetration and range, increasing WiFi throughput, and effectively reducing video stream latency and stuttering. In summary, this application has promising market application prospects.

[0065] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0066] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0067] In the description of this embodiment, the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0068] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. The preferred embodiments have been described in detail. Those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application, and all such modifications and substitutions should be covered within the scope of the claims of this application.

Claims

1. A method for improving the radio frequency (RF) performance of WiFi through walls, characterized in that, include: Main control chip, The WiFi chip is electrically connected to the main control chip; The FEM chip is connected to the WiFi chip via a first matching network. The antenna is communicatively connected to the FEM chip via a second matching network; The camera is electrically connected to the main control chip.

2. The method for improving the radio frequency performance of WiFi through walls according to claim 1, characterized in that, The FEM chip has three operating states: In TXENmode, the FEM chip is only in the transmit state, the PA is working, and the transmit power is enhanced; In RXENmode, the FEM chip is only in receiving mode, the LNA is working, and the receiving sensitivity is enhanced; In Bypass mode, the FEM chip is in pass-through mode and is not working.

3. The method for improving the radio frequency performance of WiFi through walls according to claim 1, characterized in that, The WiFi chip determines signal quality by scanning the RSSI value of the access point in real time; When the RSSI 1 value is excellent, the WiFi chip reduces its own transmission power; When the RSSI 2 value is good, the control logic selects the FEM chip to be in Bypass mode; When the RSSI 3 value is poor, the WiFi chip controls the FEM chip to enable, and the FEM chip can switch between TXENmode and RXENmode in real time through time-sharing operation to increase the transmission power or the receiving sensitivity, thereby improving the WiFi signal and throughput.

4. The method for improving the radio frequency performance of WiFi through walls according to claim 3, characterized in that, When the RSSI 1 value is excellent, the RSSI 1 value includes: greater than -50 dBm; When the RSSI 2 value is considered good, the RSSI 2 value includes: less than -50dBm and greater than -60dBm; When the RSSI 3 value is poor, the RSSI 3 value includes: less than -60 dBm.

5. The method for improving WiFi wall-penetrating performance according to claim 3 or 4, characterized in that, When the RSSI 1 value is excellent, the FEM chip is in Bypass mode and the WiFi chip reduces its own transmission power.

Images