WO2024051245A1 - Procédé et appareil de traitement de signaux - Google Patents

Procédé et appareil de traitement de signaux Download PDF

Info

Publication number
WO2024051245A1
WO2024051245A1 PCT/CN2023/100003 CN2023100003W WO2024051245A1 WO 2024051245 A1 WO2024051245 A1 WO 2024051245A1 CN 2023100003 W CN2023100003 W CN 2023100003W WO 2024051245 A1 WO2024051245 A1 WO 2024051245A1
Authority
WO
WIPO (PCT)
Prior art keywords
sequence
elements
chips
signal
threshold
Prior art date
Application number
PCT/CN2023/100003
Other languages
English (en)
Chinese (zh)
Inventor
刘辰辰
钱彬
杨洋
周正春
叶智钒
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2024051245A1 publication Critical patent/WO2024051245A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/7163—Spread spectrum techniques using impulse radio
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/7163—Spread spectrum techniques using impulse radio
    • H04B1/719—Interference-related aspects

Definitions

  • the present application relates to the field of communications, and more specifically, to a signal processing method and device.
  • Ultra wideband (UWB) technology is a wireless carrier communication technology that uses nanosecond-level non-sinusoidal narrow pulses to transmit data. Because UWB technology has the advantages of strong multipath resolution, low power consumption, and strong confidentiality, UWB technology has become one of the popular physical layer technologies for short-distance, high-speed wireless networks.
  • the structure of the physical protocol data unit (PPDU) of the UWB system includes a physical layer (physical, PHY) bearer (payload) field.
  • the PHY bearer field carries one or more data symbols. Each data symbol uses several pulses to carry several bits of the encoded signal. In the data symbol structure, each pulse occupies one chip (chip) time.
  • Multipath is a common phenomenon in communications, where radio waves take multiple paths from a transmitting antenna to a receiving antenna. From the time domain analysis, signals of different paths in multipath signals have different delays when they arrive at the receiving device. Signals with different delays arriving at the receiving device will also overlap in time at the receiving device, causing inter-symbol interference.
  • multipath effects also have a negative impact on communication quality.
  • some or all of the chips carried by signals on different paths will overlap.
  • the time difference between multipath signals arriving at the receiving device is an integer multiple of the chip time (that is, the time occupied by one chip), in other words, the delay between multipath signals arriving at the receiving device differs by an integer number of chip times.
  • the receiving device synthesizes multipath signals, if there are pulses in the overlapping chips, then these pulses will be completely aligned, and the pulses carried by the chips with opposite polarity will cancel out, and the packet error rate of the system will be greatly increased. increase, thereby significantly reducing communication quality.
  • This application provides a signal processing method and device, which can reduce the packet error rate of the system, improve the anti-interference performance of the system, and thereby improve the communication quality of the system.
  • a first aspect provides a signal processing method, which can be performed by a receiving device, or can also be performed by a component of the receiving device.
  • the method includes: receiving a first signal, the first signal is obtained according to a first sequence and N data symbols, the first sequence contains L elements, and the maximum periodic autocorrelation side lobe of the first sequence is less than or equal to the th A threshold value, each of the N data symbols includes L sequentially arranged chips, and the L sequentially arranged chips include pulse-carrying chips, and the pulse-carrying chips are identical to the first There is a one-to-one correspondence between elements in the sequence whose element values are specified values, and N and L are both positive integers; analyze the first signal.
  • the first signal received by the receiving device may include multiple signals transmitted through different paths, that is, multipath signals. Since the maximum periodic autocorrelation side lobe of the first sequence is less than or equal to the first threshold, the number of overlapping chip pulses on each data symbol in the multipath signal received by the receiving device will be as small as possible. Compared with signals that are not generated based on the first sequence, it can reduce the situation where the pulses carried by chips with opposite polarities among the overlapping chips will cancel out, thereby reducing the packet error rate of the system and improving the anti-interference performance of the system. Improve the communication quality of the system.
  • a second aspect provides a signal processing method, which method is performed by a transmitting device corresponding to the method of the first aspect.
  • the method can also be carried out by components of the transmitting device.
  • the method includes: generating a first signal based on a first sequence and N data symbols, the first sequence containing L elements, the maximum periodic autocorrelation side lobe of the first sequence being less than or equal to a first threshold, and the N data symbols
  • Each data symbol in contains L sequentially arranged chips, and the L sequentially arranged chips include pulse-carrying chips, and the pulse-carrying chips are identical to the elements whose values in the first sequence are specified values.
  • the elements correspond one to one, and N and L are both positive integers; send the first signal.
  • the first signal received by the receiving device may include multiple signals transmitted through different paths, that is, multipath signals. Since the maximum periodic autocorrelation side lobe of the first sequence used by the sending device to generate the first signal is less than or equal to the first threshold, the number of chips that overlap on each data symbol in the multipath signal received by the receiving device has a pulse number The number will be as small as possible. Compared with signals that are not generated based on the first sequence, it can reduce the situation where the pulses carried by chips with opposite polarities among the overlapping chips will cancel out, thereby reducing the packet error rate of the system and improving the anti-interference performance of the system. Improve the communication quality of the system.
  • a signal processing device configured to receive a first signal.
  • the first signal is obtained based on a first sequence and N data symbols.
  • the first sequence includes L elements, the maximum periodic autocorrelation side lobe of the first sequence is less than or equal to the first threshold, each of the N data symbols contains L sequentially arranged chips, and the L sequentially arranged codes
  • the chip includes a pulse-carrying chip, and the pulse-carrying chip has a one-to-one correspondence with an element whose element value is a specified value in the first sequence.
  • N and L are both positive integers; a processing unit is used to analyze the first signal.
  • a signal processing device configured to generate a first signal based on a first sequence and N data symbols.
  • the first sequence contains L elements.
  • the first sequence The maximum periodic autocorrelation side lobe is less than or equal to the first threshold, each of the N data symbols includes L sequentially arranged chips, and the L sequentially arranged chips include chips carrying pulses,
  • the pulse-carrying chips correspond one-to-one to the elements in the first sequence whose element values are specified values, and N and L are both positive integers; the processing unit is used to send the first signal.
  • the prescribed value is 1, among the L elements of the first sequence, K elements are 1, L-K elements are 0, and the A threshold is obtained based on K and L, K ⁇ L and K is a positive integer.
  • the first threshold is expresses right Rounded up.
  • the maximum periodic autocorrelation side lobe of the first sequence is less than or equal to the first threshold, including:
  • the maximum periodic autocorrelation side lobe of the first sequence is equal to or equal to or less than
  • the first sequence is obtained based on a second sequence containing L-1 elements, and the periodic autocorrelation side lobe of the second sequence is constant value.
  • the second sequence is an m-sequence or a Legendre sequence.
  • the first sequence is obtained based on a second sequence containing L-1 elements, including: the first sequence is a pair of L-1 elements.
  • the third sequence of elements is obtained by performing first processing, and the first processing includes at least one of cyclic shift, inversion, and negation; the third sequence is obtained based on the second sequence.
  • the first sequence is obtained according to a genetic algorithm.
  • the first sequence is: ⁇ 0, 0, 0, 1, 0, 1, 1, 1 ⁇ ; or, ⁇ 0, 0, 1, 0, 0, 1, 1, 1 ⁇ ; or, ⁇ 0, 0, 1, 0, 1, 0, 1, 1 ⁇ ; or, ⁇ 0, 0, 0, 1, 1 ,0,1,1 ⁇ .
  • the first sequence is: ⁇ 0, 0, 0, 0, 1, 0, 0, 1, 1, 0 ,1,0,1,1,1 ⁇ ; or, ⁇ 1,1,1,1,0,1,1,0,0,1,0,1,0,0,0 ⁇ ; or, ⁇ 0,0,0,1,0,1,1,1,1,0,0,1,1,0 ⁇ ; or, ⁇ 1,0,0,1,0,1 ,0,1,0,0,1,1,1,0,0 ⁇ .
  • the first sequence is: ⁇ 0, 0, 0, 1, 1, 0, 1, 0, 1 ,0,0,0,1,0,1,0,1,1,1,0,1,1,0,0,0,1,1,1,1 ⁇ ; or, ⁇ 0 ,0,1,0,1,0,1,0,0,1,0,0,0,0,1,0,1,0,1,1,1,0,1,1,0,0,0 , 0, 1, 1, 1, 1 ⁇ ; or, ⁇ 0, 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 1 ,0,1,1,1,0,1,1,0,0,0,1,1,1,1 ⁇ ; or, ⁇ 1,0,1,1,0,1,0,0 ,0,0,0,1,1,0,1,1,0,0,0,1,1,1,0 ⁇ .
  • a communication device which is used to perform the method in any possible implementation manner of the first aspect or the second aspect.
  • the device may include units and/or modules for performing the method in any possible implementation of the first aspect or the second aspect, such as a transceiver unit and/or a processing unit.
  • the transceiver unit may be a transceiver, or an input/output interface; the processing unit may be at least one processor, or a processing circuit.
  • the transceiver may be a transceiver circuit.
  • the input/output interface may be an input/output circuit.
  • a sixth aspect provides a communication device, characterized by including a processor and an interface circuit, the interface circuit being used to receive signals from other communication devices and transmit them to the processor or to send signals from the processor to Other communication devices, the processor is used to implement the method in any possible implementation manner of the above-mentioned first aspect or second aspect through logic circuits or execution of code instructions.
  • a communication device including a processor and a memory.
  • the processor is used to read the memory
  • the stored instructions can receive signals through the transceiver and transmit signals through the transmitter to execute the method in any possible implementation manner of the first aspect or the second aspect.
  • An eighth aspect provides a computer-readable storage medium, characterized in that a computer program or instructions are stored in the storage medium, and when the computer program or instructions are executed by a communication device, any of the first or second aspects can be realized.
  • a ninth aspect provides a computer program product containing instructions, which when the computer program product is run on a communication device, causes the communication device to execute the method in any of the possible implementations of the first aspect or the second aspect.
  • a tenth aspect provides a computer program instruction that, when run on a computer, causes the computer to execute the method in any of the possible implementations of the first aspect or the second aspect.
  • Figure 1 is a schematic diagram of two application scenarios provided by this application.
  • Figure 2 shows a schematic diagram of the structure of a physical protocol data unit of the UWB system.
  • FIG. 4 shows a schematic diagram of an example of the structure of a convolutional code encoder in a UWB system to which this application is applicable.
  • FIG. 5 shows a schematic diagram of an example of a scrambler structure applicable to the present application.
  • Figure 6 shows a schematic block diagram of two possible data symbol structures.
  • FIG. 7 shows a schematic diagram of the signal processing method 100 provided by this application.
  • FIG. 8 shows a schematic diagram of the basic structure of a linear feedback shift register applicable to this application.
  • FIG. 9 is a schematic diagram showing an example of the correspondence relationship between data symbol #1 and the first sequence.
  • Figure 10 shows a schematic block diagram of a genetic algorithm applicable to this application.
  • FIG. 11 is a schematic diagram showing an example of the correspondence relationship between data symbol #1 and the first sequence.
  • Figure 12 is a schematic block diagram of the communication device provided by this application.
  • FIG 13 is another schematic block diagram of the communication device provided by this application.
  • WPAN wireless personal area network
  • IEEE Institute of Electrical and Electronics Engineers 802.15 system.
  • WPAN can be used for communication between digital auxiliary equipment within a small range such as phones, computers, and accessory equipment. Its working range is generally within 10 meters (m).
  • technologies that can support wireless personal area networks include but are not limited to: Bluetooth, ZigBee, ultra wideband (UWB), infrared data association (IrDA) infrared connection technology, home Radio frequency (HomeRF), etc.
  • WPAN can be located at the bottom of the entire network architecture and is used for wireless connections between devices within a small range, that is, point-to-point short-distance connections, which can be regarded as short-distance wireless communication networks.
  • WPAN can be divided into high rate (HR)-WPAN and low rate (LR)-WPAN.
  • HR-WPAN can be used to support various high-rate multimedia applications, including high-speed Quality audio and video distribution, multi-megabyte music and image file transfer, and more.
  • LR-WPAN can be used for general business in daily life.
  • WPAN In WPAN, according to the communication capabilities of the device, it can be divided into full-function device (FFD) and reduced-function device (RFD).
  • RFD is mainly used for simple control applications, Such as light switches, passive infrared sensors, etc., the amount of data transmitted is small, the transmission resources and communication resources are not occupied, and the cost of RFD is low.
  • FFDs can communicate with each other, and FFDs and RFDs can also communicate with each other. Usually, RFDs do not communicate directly with each other, but communicate with FFDs, or forward data through an FFD.
  • the FFD associated with an RFD may also be called the coordinator of the RFD.
  • the coordinator may also be called a personal area network (PAN) coordinator or central control node, etc.
  • PAN personal area network
  • the PAN coordinator is the master control node of the entire network, and there is a PAN coordinator in each ad hoc network, which is mainly used for membership management, link information management, and packet forwarding functions.
  • the device in the embodiment of this application may be a device that supports multiple WPAN standards such as 802.15.4a and 802.15.4z, as well as those currently under discussion or subsequent versions.
  • the above-mentioned devices may be tags, communication servers, routers, switches, network bridges, computers or mobile phones, home smart devices, vehicle communication devices, wearable devices, etc.
  • Wearable devices also known as wearable smart devices, are a general term for applying wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing, and shoes.
  • Wearable devices are portable devices that are worn directly on the body or integrated into the user's clothing or accessories.
  • Wearable devices are not just hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-sized devices that can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, and those that only focus on a certain type of application function and need to cooperate with other devices such as smartphones.
  • the above-mentioned device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer.
  • This hardware layer includes hardware such as central processing unit (CPU), memory management unit (MMU) and memory (also called main memory).
  • the operating system can be any one or more computer operating systems that implement business processing through processes, such as Linux operating system, Unix operating system, Android operating system, iOS operating system or Windows operating system, etc.
  • This application layer includes applications such as browsers, address books, word processing software, and instant messaging software.
  • the embodiments of the present application do not specifically limit the specific structure of the execution subject of the method provided by the embodiments of the present application, as long as the program recorded in the code of the method provided by the embodiments of the present application can be executed according to the method provided by the embodiments of the present application. It suffices to communicate by method.
  • the execution subject of the method provided by the embodiment of the present application may be FFD or RFD, or a functional module in FFD or RFD that can call a program and execute the program.
  • This application is used to support IEEE 802.11ax next-generation wireless fidelity (Wi-Fi) protocols, such as 802.11be, Wi-Fi 7 or extremely high throughput (EHT), such as 802.11be next-generation , Wi-Fi 8, Wi-Fi artificial intelligence (AI) and other 802.11 series protocol wireless LAN systems can also be applied to UWB-based wireless personal area network systems and sensing systems.
  • Wi-Fi wireless fidelity
  • EHT extremely high throughput
  • 802.11be next-generation Wi-Fi 8 Wi-Fi 8 Wi-Fi artificial intelligence
  • other 802.11 series protocol wireless LAN systems can also be applied to UWB-based wireless personal area network systems and sensing systems. It should be noted that the following describes the embodiments of the present application by taking application to a UWB-based wireless personal area network system as an example.
  • the embodiments of the present application can also be applied to other communication systems, such as sixth generation (6th generation, 6G) mobile communication systems, fifth generation (5th generation, 5G) systems, long term evolution (long term evolution, LTE) system etc.
  • the embodiments of this application can also be used in future communication systems.
  • the embodiments of the present application can also be used for device-to-device (D2D) communication, vehicle-to-everything (V2X) communication, machine-to-machine (M2M) communication, machine-type communication ( machine type communication (MTC), and the Internet of things (IoT) communication system or other communication systems.
  • D2D device-to-device
  • V2X vehicle-to-everything
  • M2M machine-to-machine
  • MTC machine-type communication
  • IoT Internet of things
  • the sending device and/or the receiving device may be a station (STA) in a wireless local area network (WLAN).
  • the site can be a mobile phone that supports Wi-Fi communication function, a tablet computer that supports Wi-Fi communication function, a set-top box that supports Wi-Fi communication function, a smart TV that supports Wi-Fi communication function, or a smart TV that supports Wi-Fi communication function. Smart wearable devices, vehicle-mounted communication devices that support Wi-Fi communication functions, computers that support Wi-Fi communication functions, etc.
  • the site can support the 802.11be standard.
  • the site can also support multiple WLAN standards of the 802.11 family such as 802.11be, 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b and 802.11a.
  • the sending end device and/or the receiving end device in the embodiment of the present application can also be an access point (AP) in WLAN, and the access point can be a terminal device (such as a mobile phone) that enters the wired (or wireless) network.
  • Network access points are mainly deployed inside homes, buildings, and campuses. The typical coverage radius is tens to hundreds of meters. Of course, they can also be deployed outdoors.
  • the access point is equivalent to a bridge connecting the wired network and the wireless network. Its main function is to connect various wireless network clients together, and then connect the wireless network to the Ethernet.
  • the access point can be a terminal device (such as a mobile phone) or a network device (such as a router) with a Wi-Fi chip.
  • the access point can be a device that supports the 802.11be standard.
  • the access point can also be a device that supports multiple WLAN standards of the 802.11 family such as 802.11be, 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.
  • Access points and sites can also be devices used in the Internet of Vehicles, IoT nodes, sensors, etc. in the Internet of Things (IoT), smart cameras, smart remote controls, smart water meters and electricity meters in smart homes, and Sensors in smart cities, etc.
  • IoT Internet of Things
  • smart cameras smart remote controls
  • smart water meters and electricity meters in smart homes and Sensors in smart cities, etc.
  • Figure 1 is a schematic diagram of two application scenarios provided by this application.
  • the system 101 shown in (A) in Figure 1 is a communication system with star topology, and the system 102 shown in (B) in Figure 1 is a peer to peer topology. Communication Systems.
  • the system 101 may include multiple FFDs and multiple RFDs, and the multiple FFDs and multiple RFDs may form a star topology communication system.
  • one FFD among multiple FFDs is a PAN coordinator.
  • the PAN coordinator can transmit data with one or more other devices, that is, multiple devices can establish one-to-many or many-to-many devices.
  • One-to-one data transmission architecture One-to-one data transmission architecture.
  • the system 102 may include multiple FFDs and one RFD, and the multiple FFDs and one RFD may form a point-to-point topology communication system.
  • one FFD among multiple FFDs is a PAN coordinator.
  • a many-to-many data transmission architecture can be established between multiple different devices.
  • UWB technology can transmit data using nanosecond-level non-sinusoidal narrow pulses, which occupies a wide spectrum range. Since the pulses used by UWB technology to transmit data are narrow and the radiation spectrum density is extremely low, UWB technology has the advantages of strong multipath resolution, low power consumption, and strong confidentiality.
  • UWB technology has been written into the IEEE 802 series of wireless standards, and the WPAN standard IEEE 802.15.4a based on UWB technology has been released, as well as its evolved version IEEE 802.15.4z.
  • the next generation WPAN standard 802.15.4ab of UWB technology is being formulated. It has also been put on the agenda.
  • FIG 2 shows a schematic diagram of the structure of a physical protocol data unit (PPDU) of the UWB system.
  • PPDU includes a synchronization header (SHR), a physical header (PHR) and a physical layer (physical, PHY) payload field.
  • SHR synchronization header
  • PHR physical header
  • PHY physical layer
  • the PHY payload field can also be Understood as the physical service data unit (PSDU).
  • PSDU physical service data unit
  • the modulation method used in the PHY bearer field varies according to the mean pulse repetition frequency (pulse repetition frequency, PRF) of the sending device.
  • PRF pulse repetition frequency
  • PRF pulse repetition frequency
  • the bidirectional arrow in the figure indicates the location of the burst, each box represents a chip, and the lateral distance occupied by each box is one chip time, that is, T chip .
  • the time occupied by the data symbols shown in Figure 3 is T dsym .
  • each data symbol uses 8 pulses to carry the two bits after channel encoding.
  • 4 pulses are a group, and Figure 3 includes two groups of pulses. Each bit occupies 4 pulses, and the time occupied by each group of pulses is T burst , that is, 4 T chips .
  • Each group of pulses is followed by a guard interval of 4 T chip lengths, and no pulse is emitted during the guard interval.
  • FIG. 4 shows a schematic diagram of an example of the structure of a convolutional code encoder with a limit length of 7 in the UWB system to which the present application is applicable.
  • D represents the shift register
  • + represents binary addition.
  • the encoded output bits g 0 (n) and g 1 (n) using the convolutional code shown in Figure 4 are respectively mapped to two sets of pulses of the data symbols shown in Figure 3 according to Table 1, and then the pairs are mapped to two sets of pulses.
  • the data on the group pulse is scrambled by the scrambler shown in Figure 5.
  • the initial state of the scrambler is the first 15 bits of the binary sequence obtained by removing 0 from the ternary sequence in the SHR and setting -1 to 0.
  • a corresponding pulse signal is generated based on the scrambled result, 0 corresponds to a positive pulse, and 1 corresponds to a negative pulse.
  • FIG. 5 shows a schematic diagram of an example of a scrambler structure applicable to the present application.
  • D represents the shift register, and + represents binary addition.
  • S j to S j -15 are all scrambling code sequences, where S j is the scrambling code sequence input to the scrambler.
  • S n is the time-varying spreading code output by the scrambler.
  • FIG. 6 shows a schematic block diagram of two possible data symbol structures. As shown in (a) in Figure 6, one data symbol corresponds to two groups of pulses, and two pulses are one group. As shown in (b) in Figure 6, one data symbol corresponds to a group of pulses, and 4 pulses are a group.
  • Multipath is a common phenomenon in communications, where radio waves take multiple paths from a transmitting antenna to a receiving antenna. From the time domain analysis, signals of different paths in multipath signals have different delays when they arrive at the receiving device. Signals with different delays arriving at the receiving device may also overlap in time at the receiving device, causing inter-symbol interference.
  • the time difference between multipath signals arriving at the receiving device is an integer multiple of the chip time, in other words, when the delay between multipath signals arriving at the receiving device differs by an integer multiple, the signals in different paths Some or all of the chips will overlap completely.
  • the receiving device synthesizes multipath signals, when the polarities of the overlapping chips corresponding to signals of different paths are opposite, the pulses carried by the overlapping chips will cancel out, and the packet error rate of the system will increase significantly. Significantly reduces communication quality.
  • this application provides a signal processing method and device.
  • FIG. 7 shows a schematic diagram of the signal processing method 100 provided by this application.
  • the sending device generates a first signal based on the first sequence and N data symbols.
  • the first sequence contains L elements.
  • the maximum periodic autocorrelation side lobe of the first sequence is less than or equal to the first threshold.
  • Each of the N data symbols contains L sequentially arranged chips.
  • the L sequenced chips contain the pulse-carrying chips. The chip carrying the pulse corresponds one-to-one to the element in the first sequence whose element value is a specified value, and N and L are both positive integers.
  • the maximum periodic autocorrelation side lobe of the first sequence can be understood as the maximum value of the side lobe of the periodic autocorrelation function of the first sequence, or the peak value of the side lobe of the periodic autocorrelation function of the first sequence.
  • the first threshold can be obtained according to K and L, K ⁇ L and K is a positive integer.
  • the first threshold is expresses right Rounded up.
  • the chip carrying the pulse corresponds one-to-one to the element whose element value is 1 in the first sequence. Further, the chips that do not carry pulses correspond one-to-one to the elements whose element value is 0 in the first sequence.
  • the chip carrying the pulse in each data symbol corresponds one-to-one to the element with an element value of 1 in the first sequence. It does not limit that the pulses in each data symbol are all positive pulses or negative pulses, but It means that there is a pulse in the chip corresponding to the element value of the first sequence being 1 in each data symbol.
  • the sign of the pulse in each data symbol can be determined based on the information being sent. Alternatively, the sign of the pulse in each data symbol can be determined based on the scrambler shown in Figure 5. For details, please refer to the description of Figure 5.
  • the sending device sends a first signal to the receiving device.
  • the receiving device receives the first signal from the sending device.
  • the first signal may reach the receiving device through multiple paths during transmission, and the first signals passing through different paths may have different delays in reaching the receiving device.
  • the receiving device analyzes the first signal.
  • the receiving device when parsing the multiple received first signals, some or all of the chips carried by the multiple signals will overlap together. Especially when the time difference between multipath signals arriving at the receiving device is an integer multiple of the chip time, if there are pulses in the overlapping chips, these pulses will be perfectly aligned.
  • the sending device generates a first signal according to the first sequence and N data symbols, and determines the chip carrying the pulse in each data symbol through the first sequence. Since the maximum periodic autocorrelation side lobe of the first sequence is less than or equal to the At a threshold, the number of overlapping chip pulses on each data symbol in the multipath signal will be as small as possible. Compared with the structure of the data symbols shown in Figure 2 or Figure 5, it reduces the situation where the pulses carried by the opposite polarity chips in the overlapping chips will cancel out, thereby reducing the packet error rate of the system and improving the system's immunity. interference performance, thereby improving the communication quality of the system.
  • the first threshold can be obtained according to K and L, K ⁇ L and K is a positive integer.
  • the first threshold is the minimum value of the maximum periodic autocorrelation side lobe of the first sequence.
  • the method of determining the first threshold is explained in detail below with an example.
  • Example 1 assume that the S sequence is a sequence containing L elements, and the L elements include two elements, 1 and 0.
  • the periodic autocorrelation function A( ⁇ ) of the S sequence is defined as shown in Formula 1.
  • s represents the S sequence
  • s(k) represents the element value at the k+1th position in the S sequence. 0 ⁇ k ⁇ L-1, and k is an integer.
  • (k+ ⁇ ) mod L represents the remainder of k+ ⁇ divided by L, or it represents the remainder of k+ ⁇ to L.
  • s(k+ ⁇ ) modL represents the element value at the (k+ ⁇ ) mod L position in the S sequence, ⁇ 0 and ⁇ is an integer.
  • A( ⁇ ) is the output result after periodic autocorrelation of the S sequence. The output result is the sum of the periodic autocorrelation main lobe and periodic autocorrelation side lobes of the S sequence.
  • the periodic autocorrelation main lobe of the S sequence is the maximum value of A( ⁇ ).
  • each of the N data symbols is referred to as data symbol #1 below.
  • Formula 1 may also include the following meanings.
  • s can also represent data symbol #1 containing L chips.
  • the value of s(k) can also indicate whether there is a pulse on the k-th chip in data symbol #1 containing L chips.
  • the value of s(k+ ⁇ ) modL can also represent the (k+ ⁇ ) mod L-th chip in data symbol #2 containing L chips that coincides with the k-th chip in data symbol #1 . Whether there are pulses on the chip. Among them, data symbol #2 does not belong to the above-mentioned N data symbols. It should be understood that if the kth chip in data symbol #1 and the (k+ ⁇ ) modL chip in data symbol #2 have opposite polarities, the kth chip in data symbol #1 has the same polarity as the (k+ ⁇ ) modL chip in data symbol #2. When the (k+ ⁇ ) mod L chips in symbol #2 all have pulses, the pulses on the two chips will cancel each other out.
  • one of the pulses on the k-th chip in data symbol #1 and the pulse on the (k+ ⁇ ) mod L -th chip in data symbol #2 are positive pulses, and the other pulse is negative. In the case of pulses, the pulses on the two chips will cancel each other out.
  • data symbol #2 belongs to M data symbols, and the transmitting end generates the second signal based on the S sequence and M data symbols, where M is a positive integer.
  • M is a positive integer.
  • Each of the M data symbols contains L sequentially arranged chips.
  • the L sequenced chips contain the pulse-carrying chips.
  • the chip carrying the pulse corresponds one-to-one to the element whose element value is the specified value in the S sequence, and M is a positive integer.
  • the first signal and the second signal may be understood as signals transmitted through different paths among the multipath signals mentioned above.
  • the value of A( ⁇ ) can be understood as the number of pulses with interference on data symbol #1 when there is multipath signal interference with a delay difference of ⁇ chip time.
  • ⁇ 0 and ⁇ is an integral number.
  • the first signal and the second signal in Example 1 can be understood as signals transmitted through different paths among the multipath signals mentioned above.
  • the following description takes the example that the time difference between the delay of the first signal and the second signal reaching the receiving device is an integer multiple of the chip time.
  • the first threshold is determined as The S sequence that meets the following conditions can be the first sequence: the maximum periodic autocorrelation side lobe of the sequence is equal to or equal to or less than
  • Method 1 Generate a first sequence based on a second sequence whose periodic autocorrelation side lobes are constant values, and the second sequence includes L-1 elements.
  • the second sequence may be an m-sequence or a Legendre sequence.
  • the autocorrelation function side lobes of the second sequence provided in this application are constant values.
  • the following takes the second sequence as an m-sequence as an example to introduce the method of generating the first sequence based on the second sequence.
  • the m sequence is also called the longest linear feedback shift register sequence.
  • the m sequence is the sequence with the longest period generated by a linear feedback shift register (LFSR).
  • LFSR linear feedback shift register
  • D represents the shift register and + represents binary addition.
  • g i is the feedback coefficient, its value is 0 or 1, and it is a binary number. When it is 0, it indicates that the feedback branch does not exist, and when it is 1, it indicates that the feedback branch exists.
  • the output of LFSR depends on the current state of the shift register. When its corresponding polynomial cannot be factored, that is, when G(X) cannot be written as the product of two polynomials, starting from the non-zero initial state, LFSR can traverse all 2 m -1 non-zero states, and During this period, a binary sequence with a length of 2 m -1 is output, which is the binary m sequence.
  • the complementary sequence of the m sequence is the sequence obtained by replacing element 1 with 0 and 0 with 1 in the m sequence. Therefore, the periodic autocorrelation side lobe of the complementary sequence of the m sequence is also a constant value.
  • the second sequence used to generate the first sequence may therefore also include the complement of the m-sequence.
  • the second sequence may also include a complementary sequence of the Legendre sequence.
  • the data symbols in the UWB system generally include an even number of chips
  • the number of elements of the m-sequence and the Legendre sequence are both odd.
  • one element is inserted into the second sequence containing L-1 elements to obtain a new sequence (hereinafter referred to as the fourth sequence for convenience of explanation).
  • the fourth sequence may include multiple possible sequences.
  • the sequence with the smallest maximum periodic autocorrelation function among the fourth sequences may be the first sequence.
  • the m sequences shown in Table 2 are only examples. Specifically, the sequence shown in Table 2 is one of equivalent sequences of the same length.
  • the equivalent sequence can be understood as a sequence obtained by performing cyclic shift and/or reverse order operations on the sequence. Taking the m sequence of length 7 in Table 2 as an example, the equivalent sequence can be ⁇ 0, 1, 0, 1, 1, 1, 0 ⁇ obtained by cyclic shift, or ⁇ 1, 1, 1, 0, 1, 0, 0 ⁇ , or still So there are other equivalent sequences obtained by circular shift and reverse order operations. Other equivalent sequences of the m sequence can be obtained by performing cyclic shifts and/or reverse order operations on the sequences in Table 2.
  • the complementary sequence of the m sequence may be a sequence obtained by inverting the m sequence shown in Table 2, or may be a sequence obtained by inverting other equivalent sequences of the m sequence shown in Table 2.
  • Whether the value of the one-bit element inserted in the second sequence is 0 or 1 can be determined based on the second sequence. For example, if the second sequence is an m sequence or its equivalent sequence, the inserted element value is 0; if the complementary sequence of the m sequence is selected, the inserted element value is 1. In other words, inserting one element into the second sequence results in a sequence in which the number of elements with a value of 0 is equal to the number of elements with a value of 1.
  • Table 3 shows examples of first sequences with lengths of 8, 16, and 32 respectively generated according to Table 2.
  • the third column is the maximum periodic autocorrelation side lobe corresponding to the first sequence in the second column; the fourth column is the maximum periodic autocorrelation side lobe corresponding to the sequence length.
  • the fifth column is the first threshold corresponding to the sequence length. Specifically, three first sequences with a sequence length of 8 in Table 3 are generated based on one second sequence with a sequence length of 7 in Table 2. Two first sequences with a sequence length of 16 in Table 3 are generated based on one second sequence with a sequence length of 15 in Table 2. The three first sequences with a sequence length of 32 in Table 3 are respectively generated based on the three second sequences with a sequence length of 31 in Table 2.
  • the first sequence may also be obtained by subjecting the sequence in Table 3 (for convenience of explanation, hereafter referred to as the third sequence #1) to the first process.
  • the first processing includes at least one of circular shift, negation, and reverse order operations.
  • the first sequence may be the equivalent sequence of the third sequence #1.
  • FIG. 9 is a schematic diagram showing an example of the correspondence relationship between data symbol #1 and the first sequence.
  • the structure of data symbol #1 of the UWB system is constructed according to the first sequence.
  • Data symbol #1 contains 8 chips, and the sequence ⁇ 0, 0, 0, 1, 0, 1, 1, 1 ⁇ in Table 3 is selected as the first sequence.
  • the two-way arrow in Figure 9 indicates the location of the pulse (burst), each box represents a chip (chip), and the time occupied by each box is one chip time, that is, T chip .
  • Data symbol #1 takes up time T dsym .
  • this application does not limit the number of pulses in data symbol #1 occupied by each bit.
  • the structure of the data symbol can be similar to that shown in Figure 2, with each bit occupying 4 pulses in data symbol #1.
  • the structure of the data symbol shown in FIG. 5 may be similar, with each bit occupying 2 pulses in data symbol #1.
  • each bit may occupy 1 pulse in data symbol #1, or the number of pulses in data symbol #1 occupied by each bit may also be other values.
  • the first signal may include one or more PPDUs as shown in Figure 2, and the PHY bearer field in one PPDU can carry N data symbols as shown in Figure 9. In FIG. 9 , only one data symbol among N data symbols is used as an example for explanation.
  • Method 2 Based on the genetic algorithm and the coordinate descent algorithm, a sequence with a maximum periodic autocorrelation function side lobe less than or equal to the first threshold is searched for as the first sequence.
  • FIG 10 shows a schematic block diagram of a genetic algorithm applicable to this application.
  • each individual in the initialization population is a potential solution, or, a potential first sequence.
  • each individual is a sequence of length L or containing L elements.
  • Evaluate the fitness of individuals in the population The quality of the solution can be expressed based on fitness (that is, the function value of the fitness function).
  • the fitness function in method 2 is The smaller the function value of f(x), the better the solution; the larger the function value of f(x), the worse the solution.
  • Selection Select a better solution based on the fitness function, and give priority to pairwise reproduction.
  • Crossover Select a hybridization point and exchange chromosomes on both sides.
  • the parent sequence and the descendant sequence are merged.
  • Mutation Each position will have a small probability of mutation. For example, in method two, the parent sequence is mutated to generate a descendant sequence.
  • the coordinate descent method (coordinate descent, CD) applicable to this application is a non-gradient optimization algorithm. This algorithm performs a one-dimensional search along a coordinate direction at the current point in each iteration to find the local minimum of a function. Cycle through different coordinate directions throughout the process.
  • Initialization parameters can be understood as a specific example of the initialization population mentioned above.
  • i 1,2,L N P ⁇ .
  • step 1 can be understood as a specific example of the coordinate descent algorithm.
  • Use CD to perform a local search on the descendant sequence x k ', and obtain the set ⁇ O' (x k ',f O (k))
  • k 1,2,L N O ⁇ .
  • the set O' is the set of N O sequences with the best fitness (that is, the function value of the fitness function is the smallest) among the descendant sequences x k ', and their corresponding fitness function values.
  • step 2 can be understood as a specific example of the combination of coordinate descent algorithm, selection, crossover, and mutation.
  • i NP +1, N P +2, L N P +N RS ⁇ .
  • step 3 can be understood as a specific example of evolution.
  • Step 4 repeat step 2 until k ⁇ G max , end the program.
  • the set P obtained when the program ends is the target sequence set.
  • Table 4 shows examples of first sequences with lengths of 8, 16, and 32 respectively generated according to the above algorithm example.
  • the third column is the maximum periodic autocorrelation side lobe corresponding to the first sequence in the second column; the fourth column is the maximum periodic autocorrelation side lobe corresponding to the sequence length.
  • the fifth column is the first threshold corresponding to the sequence length.
  • the first sequence may also be obtained by performing the first processing on the sequence in Table 4 (for convenience of explanation, hereafter referred to as the third sequence #2).
  • the first processing includes at least one of circular shift, negation, and reverse order operations.
  • the first sequence may be the equivalent sequence of the third sequence #2.
  • FIG. 11 is a schematic diagram showing an example of the correspondence relationship between data symbol #1 and the first sequence. As shown in FIG. 11, the structure of data symbol #1 of the UWB system is constructed according to the first sequence. Data symbol #1 contains 8 chips, and the sequence ⁇ 0, 0, 0, 1, 1, 0, 1, 1 ⁇ in Table 4 is selected as the first sequence.
  • the two-way arrow in Figure 11 indicates the location of the pulse (burst), each box represents a chip (chip), and the time occupied by each box is one chip time, that is, T chip .
  • Data symbol #1 takes up time T dsym .
  • this application does not limit the number of pulses in data symbol #1 occupied by each bit.
  • the structure of the data symbol shown in FIG. 2 may be similar, with each bit occupying 4 pulses in data symbol #1.
  • the structure of the data symbol shown in FIG. 5 may be similar, with each bit occupying 2 pulses in data symbol #1.
  • each bit may occupy 1 pulse in data symbol #1, or the number of pulses in data symbol #1 occupied by each bit may also be other values.
  • the first signal may include one or more PPDUs as shown in Figure 2, and the PHY bearer field in one PPDU can carry N data symbols as shown in Figure 11. In Figure 11, only one data symbol among N data symbols is used as an example for explanation.
  • the first sequence may also be obtained by first processing the sequence in Table 5 (for convenience of explanation, hereafter referred to as third sequence #2).
  • the first processing includes at least one of circular shift, negation, and reverse order operations.
  • the first sequence may be the equivalent sequence of the third sequence #2.
  • the sending device and the receiving device include corresponding hardware structures and/or software modules that perform each function.
  • the units and method steps of each example described in conjunction with the embodiments disclosed in this application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software driving the hardware depends on the specific application scenarios and design constraints of the technical solution.
  • Figures 12 and 13 are schematic structural diagrams of possible communication devices provided by embodiments of the present application. These communication devices can be used to implement the functions of the sending device or the receiving device in the above method embodiments, and therefore can also achieve the beneficial effects of the above method embodiments.
  • the communication device may be a sending device or a receiving device, or may be a module (such as a chip) applied to the sending device or the receiving device.
  • the communication device 1100 includes a processing unit 1110 and a transceiver unit 1120 .
  • the communication device 1100 is used to implement the functions of the sending device or the receiving device in the method embodiments shown in FIGS. 7 to 11 .
  • the transceiving unit 1120 is used to receive the first signal, which is obtained according to the first sequence and N data symbols,
  • the first sequence includes L elements, the maximum periodic autocorrelation side lobe of the first sequence is less than or equal to the first threshold, each of the N data symbols includes L sequentially arranged chips, and the L
  • the sequentially arranged chips include pulse-carrying chips, and the pulse-carrying chips correspond one-to-one to the elements in the first sequence whose element values are specified values.
  • N and L are both positive integers; the transceiver unit 1120 also used to parse the first signal.
  • the processing unit 1110 is used to generate a first signal according to a first sequence and N data symbols, where the first sequence contains L elements , the maximum periodic autocorrelation side lobe of the first sequence is less than or equal to the first threshold, each of the N data symbols includes L sequentially arranged chips, and the L sequentially arranged chips include Chips carrying pulses are in one-to-one correspondence with elements in the first sequence whose element values are specified values, and N and L are both positive integers; the transceiver unit 1120 is used to send the first signal.
  • processing unit 1110 and the transceiver unit 1120 please refer to the relevant descriptions in the method embodiments shown in FIGS. 7 to 11 .
  • the communication device 1200 includes a processor 1210 and an interface circuit 1220 .
  • the processor 1210 and the interface circuit 1220 are coupled to each other.
  • the interface circuit 1220 may be a transceiver or an input-output interface.
  • the communication device 1200 may also include a memory 1230 for storing instructions executed by the processor 1210 or input data required for the processor 1210 to run the instructions or data generated after the processor 1210 executes the instructions.
  • the processor 1210 is used to implement the functions of the above-mentioned processing unit 1110
  • the interface circuit 1220 is used to implement the functions of the above-mentioned transceiver unit 1120.
  • the receiving device chip implements the functions of the receiving device in the above method embodiment.
  • the receiving device chip receives data from other modules in the receiving device (such as radio frequency modules or antennas). Information is sent by the sending device or to the receiving device; or the receiving device chip sends information to other modules (such as radio frequency modules or antennas) in the receiving device, and the information is sent by the receiving device to the sending device.
  • the terminal chip implements the functions of the sending device in the above method embodiment.
  • the chip of the sending device receives information from other modules (such as radio frequency modules or antennas) in the sending device, and the information is sent by the receiving device to the sending device; or, the chip of the sending device sends information to other modules (such as radio frequency modules) in the base station. or antenna) to send information, which is sent by the sending device to the receiving device.
  • the processor in the embodiment of the present application can be a central processing unit (Central Processing Unit, CPU), or other general-purpose processor, digital signal processor (Digital Signal Processor, DSP), or application specific integrated circuit. (Application Specific Integrated Circuit, ASIC), Field Programmable Gate Array (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof.
  • a general-purpose processor can be a microprocessor or any conventional processor.
  • the method steps in the embodiments of the present application can be implemented in hardware or in software instructions that can be executed by a processor.
  • Software instructions can be composed of corresponding software modules, and the software modules can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory In memory, register, hard disk, mobile hard disk, CD-ROM or any other form of storage medium well known in the art.
  • An exemplary storage medium is coupled to the processor such that the processor can read information from the storage medium and write information to the storage medium.
  • the storage medium may also be an integral part of the processor.
  • the processor and storage media may be located in an ASIC. Additionally, the ASIC can be located in the base station or terminal.
  • the processor and storage medium may also exist as discrete components in the base station or terminal.
  • the computer program product includes one or more computer programs or instructions.
  • the computer may be a general purpose computer, a special purpose computer, a computer network, a network device, a user equipment, or other programmable device.
  • the computer program or instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another.
  • the computer program or instructions may be transmitted from a website, computer, A server or data center transmits via wired or wireless means to another website site, computer, server, or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center that integrates one or more available media.
  • the available media may be magnetic media, such as floppy disks, hard disks, and tapes; optical media, such as digital video optical disks; or semiconductor media, such as solid-state hard drives.
  • the computer-readable storage medium may be volatile or nonvolatile storage media, or may include both volatile and nonvolatile types of storage media.
  • “at least one” refers to one or more, and “plurality” refers to two or more.
  • “And/or” describes the relationship between associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the related objects before and after are an “or”relationship; in the formula of this application, the character “/” indicates that the related objects before and after are a kind of “division” Relationship.
  • “Including at least one of A, B and C” can mean: Includes A; includes B; includes C; includes A and B; includes A and C; includes B and C; includes A, B, and C.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

La présente demande concerne un procédé et un appareil de traitement de signaux. Le procédé comprend les étapes suivantes : un appareil d'envoi génère un premier signal selon une première séquence et N symboles de données, la première séquence comprenant L éléments, le lobe latéral d'autocorrélation périodique maximale de la première séquence étant inférieur ou égal à une première valeur seuil, chaque symbole de données parmi les N symboles de données comprenant L puces agencées en séquence, les L puces agencées en séquence comprenant des puces prenant en charge des impulsions, les puces prenant en charge les impulsions correspondant, sur une base biunivoque, à des éléments, dont des valeurs d'élément sont des valeurs spécifiées, dans la première séquence, et N et L étant tous deux des nombres entiers positifs ; l'appareil d'envoi envoie le premier signal à un appareil de réception ; et l'appareil de réception analyse le premier signal. Au moyen du procédé et de l'appareil décrits dans la présente demande, la situation dans laquelle des impulsions prises en charge par des puces ayant des polarités opposées parmi des puces se chevauchant mutuellement sont décalées peut être amoindrie, de telle sorte que le taux d'erreur de paquet d'un système puisse être réduit, et que les performances anti-interférence du système soient améliorées, ce qui permet d'améliorer la qualité de communication du système.
PCT/CN2023/100003 2022-09-09 2023-06-13 Procédé et appareil de traitement de signaux WO2024051245A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202211102610.3A CN117728863A (zh) 2022-09-09 2022-09-09 信号处理的方法及装置
CN202211102610.3 2022-09-09

Publications (1)

Publication Number Publication Date
WO2024051245A1 true WO2024051245A1 (fr) 2024-03-14

Family

ID=90192731

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2023/100003 WO2024051245A1 (fr) 2022-09-09 2023-06-13 Procédé et appareil de traitement de signaux

Country Status (3)

Country Link
CN (1) CN117728863A (fr)
TW (1) TW202412490A (fr)
WO (1) WO2024051245A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040057501A1 (en) * 2002-09-23 2004-03-25 Krishna Balachandran Systems and methods for providing adaptive pulse position modulated code division multiple access for ultra-wideband communication links
US20040057500A1 (en) * 2002-09-23 2004-03-25 Krishna Balachandran Variable spacing pulse position modulation for ultra-wideband communication links
US20050117628A1 (en) * 2002-08-12 2005-06-02 Brethour Vernon R. Method for generating communication signal sequences having desirable correlation properties and system for using same
CN1722622A (zh) * 2004-05-17 2006-01-18 微软公司 正交脉冲极性调制
CN101083482A (zh) * 2007-07-12 2007-12-05 北京邮电大学 一种用于脉冲超宽带通信系统的信号接收方法
US20100202494A1 (en) * 2009-02-09 2010-08-12 Texas Instruments Incorporated Ultra wideband modulation for body area networks
US20190273636A1 (en) * 2018-03-05 2019-09-05 Apple Inc. Secure training sequence symbol structure

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050117628A1 (en) * 2002-08-12 2005-06-02 Brethour Vernon R. Method for generating communication signal sequences having desirable correlation properties and system for using same
US20040057501A1 (en) * 2002-09-23 2004-03-25 Krishna Balachandran Systems and methods for providing adaptive pulse position modulated code division multiple access for ultra-wideband communication links
US20040057500A1 (en) * 2002-09-23 2004-03-25 Krishna Balachandran Variable spacing pulse position modulation for ultra-wideband communication links
CN1722622A (zh) * 2004-05-17 2006-01-18 微软公司 正交脉冲极性调制
CN101083482A (zh) * 2007-07-12 2007-12-05 北京邮电大学 一种用于脉冲超宽带通信系统的信号接收方法
US20100202494A1 (en) * 2009-02-09 2010-08-12 Texas Instruments Incorporated Ultra wideband modulation for body area networks
US20190273636A1 (en) * 2018-03-05 2019-09-05 Apple Inc. Secure training sequence symbol structure

Also Published As

Publication number Publication date
CN117728863A (zh) 2024-03-19
TW202412490A (zh) 2024-03-16

Similar Documents

Publication Publication Date Title
EP3198947A1 (fr) Procédé de communication et appareil associé
JP5670450B2 (ja) 多重ピアツーピアシグナリングのための装置および方法
JP6235072B2 (ja) 高効率ワイヤレスネットワークにおける通信効率の改善のためのシステムおよび方法
WO2024051245A1 (fr) Procédé et appareil de traitement de signaux
WO2021159600A1 (fr) Procédé et appareil de transmission d'informations de commande
WO2024036949A1 (fr) Procédé et appareil de traitement de signaux
WO2024012259A1 (fr) Procédé et appareil de communication
WO2023241431A1 (fr) Procédé et appareil de transmission d'unité de données de protocole physique sur la base d'une bande ultra-large
WO2023227041A1 (fr) Procédé et appareil de communication
Sasikumar et al. Contention-based Access Protocol for Intra-Cluster Communications in Mobile Ad hoc Networks
CN117640313A (zh) 信号处理方法及装置
WO2023160314A1 (fr) Procédé et appareil de transmission d'une unité de données de protocole de couche physique
KR102131947B1 (ko) 짧은 맥 헤더를 이용한 데이터 전송 방법 및 짧은 맥 헤더를 이용한 데이터 전송 장치
WO2023083134A1 (fr) Procédé et appareil de transmission de données
WO2023185633A1 (fr) Procédé, appareil et système de communication
WO2023061311A1 (fr) Procédé et appareil de transmission d'une unité de données de protocole physique
WO2023236933A1 (fr) Procédé et appareil de communication
WO2023165454A1 (fr) Procédé et appareil de communication
WO2024099142A1 (fr) Procédé et appareil de communication
WO2023185637A1 (fr) Procédé de mesure de distance sécurisée et appareil de communication
JP5563076B2 (ja) 多重ピアツーピアシグナリングのための装置および方法
WO2024007477A1 (fr) Procédé et dispositif de télémétrie
WO2024051488A1 (fr) Procédé et appareil de transmission d'informations
WO2023072077A1 (fr) Procédé de communication et appareil associé
Kumar Collision Avoidance and Extending Range & Capacity in ZigBee

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23861948

Country of ref document: EP

Kind code of ref document: A1