A self-defined wi-fi data packet transceiver device based on SDR

Abstract

The application discloses a kind of based on SDR's custom Wi-Fi data packet transceiver device, the device includes custom Wi-Fi data packet module, Wi-Fi data packet and baseband signal conversion module, computer and software defined radio hardware interface module, software defined radio hardware module, antenna module of wireless signal transceiver.The sending process of the method of the device is that custom Wi-Fi data packet module is responsible for custom sending Wi-Fi data packet format;Wi-Fi data packet and baseband signal conversion module will custom Wi-Fi data packet frame be converted into Wi-Fi baseband signal data;Computer and software defined radio hardware interface module is responsible for transmitting Wi-Fi baseband signal data to software defined radio hardware module;Software defined radio hardware module converts Wi-Fi baseband signal data into radio frequency signal;Wireless signal transceiver antenna module sends radio frequency signal to air medium communication.The receiving process of the method of the device is contrary to sending process.

Description

Technical Field

[0001] This invention relates to the field of wireless communication technology, specifically to a custom Wi-Fi data packet transceiver based on SDR, for meeting the testing and application needs of various communication environments. Background Technology

[0002] In today's digital age, wireless networks have become the infrastructure for modern information transmission. Wi-Fi, with its convenience and flexibility, is widely used in homes, schools, shopping malls, office buildings, factories, and other locations. While Wi-Fi technology is ubiquitous, potential wireless security issues remain, and new technologies utilizing Wi-Fi, such as backscattering, are rapidly developing. Commercial routers only support the transmission and reception of standard Wi-Fi protocols and cannot handle the transmission and reception of custom Wi-Fi data packets, thus failing to support wireless Wi-Fi security and new Wi-Fi-based application scenarios.

[0003] Software-defined radio (SDR) is a wireless communication technology proposed by Joseph Mitola in 1991. SDR refers to the ability of radio channel modulation waveforms to be defined by software. Therefore, SDR offers the convenience of reconfiguration and can be adapted to various application scenarios as needed. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to provide a transceiver device capable of supporting custom Wi-Fi data packets. To solve the above problem, the present invention provides the following technical solution.

[0005] This invention discloses a custom Wi-Fi data packet transceiver based on SDR. The device includes a custom Wi-Fi data packet module, a Wi-Fi data packet to baseband signal conversion module, a computer-to-software-defined radio (Software-defined radio) hardware interface module, a Software-defined Radio (Software-defined Radio) hardware module, and a wireless signal transceiver antenna module. The transmission process of this device involves the custom Wi-Fi data packet module defining the format for transmitting Wi-Fi data packets; the Wi-Fi data packet to baseband signal conversion module converting the custom Wi-Fi data packet frames into Wi-Fi baseband signal data; the computer-to-software-defined radio (Software-defined Radio) hardware interface module transmitting the Wi-Fi baseband signal data to the Software-defined Radio (Software-defined Radio) hardware module; the Software-defined Radio (Software-defined Radio) hardware module converting the Wi-Fi baseband signal data into radio frequency (RF) signals; and the wireless signal transceiver antenna module transmitting the RF signals into the air for communication. The reception process of this device is the reverse of the transmission process.

[0006] The aforementioned custom Wi-Fi data packet module is characterized by the ability to arbitrarily customize the frame format of the Wi-Fi data packet MAC layer as a data frame, control frame, or management frame; to arbitrarily customize the 802.11b, 802.11a, 802.11g, 802.11n, 802.11ac, and 802.11ax of the Wi-Fi data packet PHY layer; and to customize the operating frequency and data rate of the Wi-Fi data packet.

[0007] The aforementioned Wi-Fi data packet to baseband signal conversion module is characterized in that the module is a Matlab WLANToolbox software tool that supports the conversion of any Wi-Fi data packet frame format into baseband signal data.

[0008] The aforementioned interface module for computer and software-defined radio hardware is characterized in that the module is a high-speed 10 Gigabit Ethernet interface and uses an SFP+ optical module.

[0009] The aforementioned software-defined radio hardware module is characterized in that it comprises an X310 baseband section and a UBX160 RF section. The X310 uses a high-performance Kintex 7-410T FPGA, supporting a clock frequency of 200 MHz, 406k logic units, an ADC resolution of 14 bits, a maximum ADC sampling rate of 200 MSample / s, a DAC resolution of 16 bits, a DAC sampling rate of 800 MSample / s, and a local oscillator accuracy of 2.5ppm. The UBX160 is a full-duplex transceiver with an RF tuning frequency range of 10 MHz-6 GHz, a maximum instantaneous signal processing bandwidth of 160 MHz, a receive I / Q imbalance performance of less than -30 dBc, a maximum transmit power greater than 20 dBm in the 10 MHz to 3.5 GHz range, a maximum transmit power of 13 to 18 dBm in the 4 to 5 GHz range, and a maximum transmit power of 7 to 13 dBm in the 5 to 6 GHz range.

[0010] The aforementioned wireless signal transceiver antenna module is characterized in that the module is a VERT2450 dual-band 2.4 to 2.48 GHz and 4.9 to 5.9 GHz vertical omnidirectional antenna.

[0011] The technical solution of this invention has the following beneficial effects: This invention can realize the transmission and reception of custom Wi-Fi data packets based on software-defined radio. Through this device, according to the custom Wi-Fi data packets, the Wi-Fi data packets are converted into Wi-Fi baseband signals. The Wi-Fi baseband signals are transmitted as radio frequency signals through the software-defined radio hardware platform, ultimately realizing the transmission and reception of Wi-Fi data frames, control frames, and management frames under specific Wi-Fi standards and channels.

[0012] This invention employs a custom Wi-Fi data packet transceiver based on software radio and Matlab to achieve hierarchical transmission and reception of Wi-Fi data.

[0013] This invention's device can customize Wi-Fi data packets, specifying Wi-Fi frames as data frames, control frames, or management frames; it can transmit at a center frequency of 2.4 GHz or 5 GHz; it can specify single or repeated transmission on any Wi-Fi channel; it can specify the Wi-Fi physical layer modulation as DSSS or OFDM; and it can specify the Wi-Fi symbol coding modulation as BPSK, QPSK, or QAM modes. Simultaneously, this device can also receive and parse data packets conforming to the Wi-Fi protocol specification.

[0014] Compared to commercial wireless Wi-Fi routers, this invention supports the transmission of custom Wi-Fi data packets, rather than just the forwarding of standard Wi-Fi data packets, which is beneficial for research on Wi-Fi protocol messages and related communications. Attached Figure Description

[0015] Figure 1 This invention describes the working principle of a custom Wi-Fi data packet transceiver based on SDR.

[0016] Figure 2 This describes the working principle of the custom Wi-Fi data packet module of the present invention.

[0017] Figure 3 This describes the working principle of the Wi-Fi data packet and baseband signal conversion module of the present invention.

[0018] Figure 4 This invention describes the working principle of the interface module, software-defined radio hardware module, and antenna module. Detailed Implementation

[0019] The implementation of the present invention will be described in further detail below with reference to the accompanying drawings.

[0020] like Figure 1As shown, a custom Wi-Fi data packet transceiver based on SDR is disclosed. The device includes a custom Wi-Fi data packet module, a Wi-Fi data packet to baseband signal conversion module, a computer-to-software-defined radio (Software-defined radio) hardware interface module, a Software-defined Radio (Software-defined Radio) hardware module, and a wireless signal transceiver antenna module. The transmission process of this device is as follows: the custom Wi-Fi data packet module is responsible for defining the format of the Wi-Fi data packets to be transmitted; the Wi-Fi data packet to baseband signal conversion module converts the custom Wi-Fi data packet frames into Wi-Fi baseband signal data; the computer-to-software-defined radio (Software-defined Radio) hardware interface module transmits the Wi-Fi baseband signal data to the Software-defined Radio (Software-defined Radio) hardware module; the Software-defined Radio (Software-defined Radio) hardware module converts the Wi-Fi baseband signal data into radio frequency (RF) signals; and the wireless signal transceiver antenna module transmits the RF signals into the air for communication. The reception process of this device is the reverse of the transmission process.

[0021] The aforementioned custom Wi-Fi data packet module, such as Figure 2 As shown.

[0022] Step 1: Customize the Wi-Fi packet MAC layer frame format to be a data frame, control frame, or management frame. The MAC frame content includes a MAC header, frame body, and frame check sequence (FCS). The frame header definition includes frame control, duration, address, and sequence control. This step allows you to customize each bit according to the Wi-Fi protocol specifications and the frame content to be sent.

[0023] Step 2: Customize the Wi-Fi packet physical layer format. The Wi-Fi physical layer includes the Physical Layer Convergence Procedure (PLCP) and the Physical Medium Dependent (PMD) layer. This step involves customizing the physical frame based on the physical layer parameters specified by the Wi-Fi protocol, such as modulation scheme, channel coding scheme, and conformal coding scheme.

[0024] Step 3: Customize the operating frequency and data rate of Wi-Fi data packets. This step involves customizing the operating frequency, i.e., the communication channel, according to the allowed communication channels specified by the Wi-Fi protocol.

[0025] The aforementioned Wi-Fi data packet and baseband signal conversion module, such as Figure 3 As shown.

[0026] Step 1: First, determine whether the received custom Wi-Fi data packet is a data frame, a control frame, or a management frame.

[0027] Step 2: If it is a data frame, the Wi-Fi data packet needs to be split and encapsulated into multiple MSDUs; if it is a control frame or management frame, the data packet does not need to be split.

[0028] Step 3: Encapsulate the MSDU into an MPDU based on the MAC frame header and type in the custom Wi-Fi data packet.

[0029] Step 4: Generate the Wi-Fi baseband waveform based on the PHY frame header and type in the custom Wi-Fi data packet.

[0030] The aforementioned interface module, software-defined radio hardware module, and antenna module, such as Figure 4 As shown.

[0031] Step 1: The computer interconnects with the software radio hardware device via a 10 G Ethernet interface using an SFP+ optical module.

[0032] Step 2: Transmit the Wi-Fi baseband signal data waveform to the software radio platform X310. The USRP X310 uses a high-performance FPGA Kintex 7-410T, which supports up to 200 MSample / s.

[0033] Step 3: After the baseband signal is processed by the FPGA, it is transmitted to the UBX160 RF section. The UBX160 RF supports 10MHz-6 GHz and has a maximum signal processing bandwidth of 160MHz.

[0034] Step 4: The radio frequency signal is transmitted into the air medium through the VERT2450 dual-band 2.4 to 2.48 GHz and 4.9 to 5.9 GHz vertical omnidirectional antennas.

Claims

1. This invention discloses a custom Wi-Fi data packet transceiver based on SDR. The device includes a custom Wi-Fi data packet module, a Wi-Fi data packet to baseband signal conversion module, a computer-to-software-defined radio (Software-defined radio) hardware interface module, a Software-defined Radio (Software-defined radio) hardware module, and a wireless signal transceiver antenna module. The transmission process of this device involves the custom Wi-Fi data packet module defining the format for transmitting Wi-Fi data packets; the Wi-Fi data packet to baseband signal conversion module converting the custom Wi-Fi data packet frames into Wi-Fi baseband signal data; the computer-to-software-defined radio (Software-defined radio) hardware interface module transmitting the Wi-Fi baseband signal data to the Software-defined radio (Software-defined radio) hardware module; the Software-defined radio (Software-defined radio) hardware module converting the Wi-Fi baseband signal data into radio frequency (RF) signals; and the wireless signal transceiver antenna module transmitting the RF signals into the air for communication. The reception process of this device is the reverse of the transmission process.

2. The custom Wi-Fi data packet module according to claim 1, characterized in that, The frame format of the Wi-Fi data packet MAC layer can be arbitrarily customized as a data frame, control frame, or management frame; the 802.11b, 802.11a, 802.11g, 802.11n, 802.11ac, and 802.11ax of the Wi-Fi data packet PHY layer can be arbitrarily customized; and the operating frequency and data rate of the Wi-Fi data packet can be customized.

3. The Wi-Fi data packet and baseband signal conversion module according to claim 1, characterized in that, The module is a Matlab WLAN Toolbox software tool that supports converting any Wi-Fi data packet frame format into baseband signal data.

4. The interface module between a computer and software-defined radio hardware according to claim 1, characterized in that, The module features a high-speed 10 Gigabit Ethernet interface and uses an SFP+ optical module.

5. The software-defined radio hardware module according to claim 1, characterized in that, The module comprises an X310 baseband section and a UBX160 RF section. The X310 uses a high-performance Kintex 7-410T FPGA, supporting a clock frequency of 200MHz, 406k logic units, a 14-bit ADC resolution, a maximum ADC sampling rate of 200MSample / s, a 16-bit DAC resolution, a DAC sampling rate of 800MSample / s, and a local oscillator accuracy of 2.5ppm. The UBX160 is a full-duplex transceiver with an RF tuning frequency range of 10 MHz-6 GHz, a maximum instantaneous signal processing bandwidth of 160 MHz, a receive I / Q imbalance performance of less than -30 dBc, a maximum transmit power greater than 20 dBm in the 10 MHz to 3.5 GHz range, a maximum transmit power of 13 to 18 dBm in the 4 to 5 GHz range, and a maximum transmit power of 7 to 13 dBm in the 5 to 6 GHz range.

6. The antenna module for wireless signal transceiver according to claim 1, characterized in that, The module is a VERT2450 dual-band 2.4 to 2.48 GHz and 4.9 to 5.9 GHz vertical omnidirectional antenna.

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