Wireless communication method and communication device

Abstract

Provided are a wireless communication method and a communication device. The method comprises: a first device sending a first PPDU, wherein a data field of the first PPDU is carried by means of a plurality of frequency domain portions, the plurality of frequency domain portions comprise repeated data, and the repeated data is mapped to the plurality of frequency domain portions via phase rotation. In the present application, repeated data is mapped to a plurality of frequency domain portions via phase rotation. The phase rotation can reduce the PAPR caused by periodicity resulting from frequency domain duplication.

Description

Wireless communication method and communication device TECHNICAL FIELD

[0001] The present application relates to the technical field of communication, and more particularly, to a wireless communication method and a communication device. BACKGROUND

[0002] Some communication technologies (for example, enhanced long range (ELR)) can perform frequency domain replication on a data field. The present application inventors have found that when a data field is replicated in the frequency domain, the peak-to-average power ratio (PAPR) of its time domain signal increases, causing the signal to enter the nonlinear region of the power amplifier, which leads to nonlinear distortion of the signal and affects the performance of the transmitted signal.

[0003] SUMMARY

[0004] The present application provides a wireless communication method and a communication device. The various aspects of the present application are described below.

[0005] In a first aspect, a wireless communication method is provided. The method includes: a first device sending a first physical layer protocol data unit (PPDU); wherein a data field of the first PPDU is carried by multiple frequency domain parts, the multiple frequency domain parts including repeated data, and the repeated data being mapped to the multiple frequency domain parts after phase rotation.

[0006] In a second aspect, a wireless communication method is provided. The method includes: a second device receiving a first PPDU; wherein a data field of the first PPDU is carried by multiple frequency domain parts, the multiple frequency domain parts including repeated data, and the repeated data being mapped to the multiple frequency domain parts after phase rotation.

[0007] In a third aspect, a communication device is provided. The communication device is a first device, and the communication device includes: a sending unit configured to send a first PPDU; wherein a data field of the first PPDU is carried by multiple frequency domain parts, the multiple frequency domain parts including repeated data, and the repeated data being mapped to the multiple frequency domain parts after phase rotation.

[0008] In a fourth aspect, a communication device is provided. The communication device is a second device, and the communication device includes: a receiving unit configured to receive a first PPDU; wherein a data field of the first PPDU is carried by multiple frequency domain parts, the multiple frequency domain parts including repeated data, and the repeated data being mapped to the multiple frequency domain parts after phase rotation.

[0009] In a fifth aspect, a communication device is provided, which includes a processor and a memory. The memory is configured to store one or more computer programs. The processor is configured to invoke the computer programs in the memory to cause the communication device to perform some or all of the steps in the methods of the various aspects described above.

[0010] In a sixth aspect, a communication system is provided, which includes the communication device described above. In another possible design, the system can further include other devices interacting with the communication device in the solutions provided by the embodiments.

[0011] In a seventh aspect, a computer-readable storage medium is provided, which stores a computer program. The computer program causes a communication device to perform some or all of the steps in the methods of the various aspects described above.

[0012] In an eighth aspect, a computer program product is provided, which includes a non-transitory computer-readable storage medium storing a computer program. The computer program is operable to cause a communication device to perform some or all of the steps in the methods of the various aspects described above. In some implementations, the computer program product can be a software installation package.

[0013] In a ninth aspect, a chip is provided, which includes a memory and a processor. The processor can invoke and run a computer program from the memory to implement some or all of the steps described in the methods of the various aspects described above.

[0014] In the present application, the repeated data is mapped to multiple frequency domain parts through phase rotation. Through phase rotation, the PAPR caused by periodicity due to frequency domain replication can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] FIG. 1 is a schematic diagram of a wireless communication system to which embodiments of the present application are applied.

[0016] FIG. 2 is an example diagram of a format of an ELR PPDU.

[0017] FIG. 3 is a schematic flowchart of a wireless communication method provided by an embodiment of the present application.

[0018] FIG. 4A is an example diagram of a first PPDU provided by embodiment 1.1 of the present application.

[0019] FIG. 4B is an example diagram of a first PPDU provided by embodiment 1.2 of the present application.

[0020] FIG. 5A is an example diagram of a first PPDU provided by embodiment 2.1 of the present application.

[0021] FIG. 5B is an example diagram of a first PPDU provided by Embodiment 2.2 of the present application.

[0022] FIG. 6A is an example diagram of a first PPDU provided by Embodiment 3.1 of the present application.

[0023] FIG. 6B is an example diagram of a first PPDU provided by Embodiment 3.2 of the present application.

[0024] FIG. 7A is an example diagram of a first PPDU provided by Embodiment of the present application.

[0025] FIG. 7B is an example diagram of another first PPDU provided by Embodiment of the present application.

[0026] FIG. 8A is a diagram of a simulation result provided by the present application.

[0027] FIG. 8B is a diagram of another simulation result provided by the present application.

[0028] FIG. 8C is a diagram of another simulation result provided by the present application.

[0029] FIG. 9 is a diagram of a schematic structure of a communication device provided by Embodiment of the present application.

[0030] FIG. 10 is a diagram of a schematic structure of another communication device provided by Embodiment of the present application.

[0031] FIG. 11 is a diagram of a schematic structure of an apparatus for communication provided by Embodiment of the present application. DETAILED DESCRIPTION

[0032] The technical solutions in the present application will be described below with reference to the accompanying drawings.

[0033] Communication system

[0034] The technical solutions of the embodiments of the present application can be applied to various communication systems, for example, a wireless local area network (WLAN), a wireless fidelity (WiFi), a high performance radio local area network (HIPELAN), a wide area network (WAN), a cellular network or other communication systems, and the like. For another example, the technical solutions provided by the embodiments of the present application can be applied to a communication system using an 802.11 standard. Exemplarily, the 802.11 standard includes but is not limited to: an 802.11ax standard, an 802.11be standard, an 802.11bn standard, a post 802.11bn standard, and the like.

[0035] FIG. 1 shows a schematic diagram of a communication system to which the embodiments of the present application are applicable. Referring to FIG. 1, communication devices in a communication system 100 can include an access point (AP) 111, an AP 112, a station (STA) 121 and a STA 122, wherein the STA 121 can access a network through the AP 111, and the STA 122 can access the network through the AP 112.

[0036] In some implementations, a STA can establish an association relationship with one or more APs, and then the STA and the APs having the association relationship can communicate with each other. Referring to FIG. 1, the AP 111 and the STA 121 can communicate with each other after establishing an association relationship, and the AP 112 and the STA 122 can communicate with each other after establishing an association relationship.

[0037] In some implementations, the communication in the communication system 100 can be communication between an AP and a non-AP STA, or communication between non-AP STAs, or communication between a STA and a peer STA, wherein the peer STA can refer to a device communicating with the STA, for example, the peer STA can be an AP or a non-AP STA.

[0038] It should be understood that FIG. 1 exemplarily shows two AP STAs and two non-AP STAs, and the communication system 100 can include a larger number of AP STAs, or the communication system 100 can include a larger number of non-AP STAs, which are not limited by the embodiments of the present application.

[0039] In addition, the communication system can be applied to a multi-device cooperation scenario, such as a multi-AP (multiple access points, multi-AP) cooperation scenario or a multi-site cooperation scenario.

[0040] In the embodiments of the present application, the names of the AP and / or the STA are not limited. In some scenarios, the AP can also be referred to as an AP STA, that is, in a certain sense, the AP is also a kind of STA. In other scenarios, the STA can also be referred to as a non-AP STA (non-AP STA).

[0041] In some scenarios, the communication device described above can also be a multi-link device (MLD), that is, a device that can communicate through multiple communication links, where the multiple communication links can include communication links of different frequency bands, for example, can include millimeter wave frequency bands and / or low frequency frequency bands. Generally, if the multi-link device is an AP, the AP can also be referred to as an AP MLD. If the multi-link device is a non-AP STA, the non-AP STA can also be referred to as a non-AP MLD.

[0042] In the embodiments of the present application, the AP can be a device in a wireless network. The AP can be a communication server, a router, a switch, a bridge, or the like, or the AP can include various forms of macro base stations, micro base stations, relay stations, and the like, and of course the AP can also be a chip or a circuit or a processing system in these various forms of devices, thereby implementing the methods and functions of the embodiments of the present application. The AP can be applied to various scenarios, such as a sensor node in a smart city (such as a smart water meter, a smart electricity meter, a smart air detection node), a smart device in a smart home (such as a smart camera, a projector, a display screen, a television, a sound system, a refrigerator, a washing machine, etc.), a node in the Internet of Things, an entertainment terminal (such as an AR, a VR, and the like wearable device), a smart device in a smart office (such as a printer, a projector, etc.), a vehicle networking device in vehicle networking, some infrastructure in daily life (such as a vending machine, a self-service navigation station in a supermarket, a self-service checkout device, a self-service ordering machine), and the like.

[0043] In some implementations, the role of the STA in the communication system is not absolute, and in some scenarios, the STA can act as an AP. For example, in the scenario of a mobile phone connecting a router, the mobile phone can be a non-AP STA, and in the case of the mobile phone acting as a hotspot for other mobile phones, the mobile phone acts as an AP.

[0044] In the embodiments of the present application, the STA in the embodiments of the present application can be a device with wireless transceiving function, for example, can support 802.11 series protocols, and can communicate with an AP or other STAs. For example, the STA is any user communication device that allows a user to communicate with an AP and then communicate with a WLAN. The STA is, for example, a user equipment (UE), a mobile station (MS), a mobile terminal (MT), an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile terminal, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user equipment, etc.

[0045] The STA in the embodiments of the present application can also be a device providing voice / data / image connectivity to a user, for example, a handheld device, a vehicle-mounted device, a home device, a household appliance, a game device, etc. with wireless connection function or equipped with a wireless communication module. For example, a mobile phone, a tablet computer, a notebook computer, a palm computer, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self driving, a drone or a flight photography device, a wireless terminal in remote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a 5G network or a terminal device in a future evolved public land mobile network (PLMN), etc. with wireless connection function, and can also be a television, a refrigerator, a washing machine, a kitchen appliance, a door lock, a fish tank, a sweeping robot, a game machine, a camera / camcorder, etc. with wireless connection function, and the embodiments of the present application are not limited thereto.

[0046] By way of example and not limitation, in the embodiments of the present application, the STA can also be a wearable device. The wearable device can also be referred to as a wearable smart device, which is a general term for devices that are designed and developed by applying wearable technology to daily wear, such as glasses, gloves, watches, clothing, and shoes. For example, a smart watch or smart glasses, etc., and only focus on a certain type of application function, need to be used with other devices such as a smart phone, such as various types of smart wristbands, smart jewelry, etc. for monitoring vital signs.

[0047] In addition, in the embodiments of the present application, the STA can also be a terminal device in an internet of things (IoT) system. The IoT is an important part of future information technology development, and its main technical feature is to connect objects through communication technology and network, so as to realize the intelligent network of man-machine interconnection and object-object interconnection. In the embodiments of the present application, the IoT technology can achieve massive connection, deep coverage and terminal power saving through, for example, narrow band (NB) technology.

[0048] In addition, in the embodiments of the present application, the STA can be a device in a vehicle-to-everything (V2X) system. The communication mode in the V2X system is collectively referred to as V2X (X represents anything). For example, the V2X communication includes vehicle-to-vehicle (V2V) communication, vehicle-to-infrastructure (V2I) communication, vehicle-to-pedestrian (V2P) communication or vehicle-to-network (V2N) communication, etc.

[0049] In addition, in the embodiments of the present application, the STA can also include a smart printer, a train detector, a gas station sensor, and the like, and the main functions include collecting data (part of the terminal device), receiving control information and downlink data of the AP, and transmitting electromagnetic waves to transmit data to the AP.

[0050] In addition, the AP in the embodiments of the present application can be a device for communicating with the STA. The AP can be a network device in a wireless local area network, and the AP can be used for communicating with the STA through the wireless local area network.

[0051] From the perspective of the communication mode supported by the AP, in some implementation manners, the AP can be a device supporting the 802.11be mode. The AP can also be a device supporting multiple current and future WLAN modes of the 802.11 family, such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b and 802.11a.

[0052] From the perspective of the communication mode supported by the STA, in some implementation manners, the non-AP STA can support the 802.11be mode. The non-AP STA can also support multiple current and future WLAN modes of the 802.11 family, such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b and 802.11a.

[0053] In the embodiments of the present application, the frequency bands supported by the WLAN technology are not limited. In some implementations, the frequency bands supported by the WLAN technology can include, but are not limited to, low frequency bands (such as 2.4 GHz, 5 GHz, 6 GHz), high frequency bands (such as 45 GHz, 60 GHz).

[0054] It should be understood that the specific forms of the STA and the AP in the embodiments of the present application are not specially limited, and are only exemplary described herein.

[0055] Construction of data field of PPDU

[0056] For ease of understanding, the steps of data field construction are described below taking an extremely high throughput (EHT) PPDU as an example. It can be understood that some or all of the steps of data field construction described below can also be applied in other types of PPDU, such as an ultra-high reliability (UHR) PPDU, an ELP PPDU.

[0057] The data word of the EHT PPDU can pass through the following functional blocks (or corresponding steps).

[0058] 1) SERVICE field construction.

[0059] 2) Pre-FEC padding, additional pre-FEC padding bits.

[0060] 3) Scrambler, scrambling pre-FEC padded data.

[0061] 4) Encoder, using BCC or LDPC encoding.

[0062] 5) Post-FEC padding, additional post-FEC padding bits and packet extension (PE) field.

[0063] 6) Stream parser, rearranging the output of the encoder into blocks.

[0064] 7) Segment parser, which divides each spatial stream output from the stream parser into multiple frequency subblocks.

[0065] 8) BCC interleaver, which interleaves if BCC is used by the user.

[0066] 9) Constellation mapper, which maps to BPSK, BPSK-DCM, QPSK, 16-QAM, 64-QAM, 256-QAM, 1024-QAM, or 4096-QAM constellation points.

[0067] 10) LDPC tone mapper, which LDPC tone maps all LDPC encoded streams if LDPC is used by the user.

[0068] 11) Segment deparser, which merges multiple 80 MHz frequency subblocks into one frequency segment.

[0069] 12) Frequency domain duplication, which performs frequency domain duplication for EHT SU transmissions using EHT-MCS14. In other cases, this step can be bypassed.

[0070] 13) Pilot insertion, which inserts pilots.

[0071] 14) CSD, which applies CSD to each spatial stream.

[0072] 15) Spatial mapping, which applies the Q matrix. Signals from all users in each RU are merged into this block.

[0073] 16) Inverse discrete Fourier transform (IDFT), which computes the inverse discrete Fourier transform.

[0074] 17) Insert GI and apply windowing, append the GI determined by the TXVECTOR parameter GI_TYPE and apply windowing.

[0075] 18) Analog and radio frequency (RF), upconvert the resulting complex baseband waveform with each transmit chain to an RF signal according to the center frequency of the desired channel and transmit.

[0076] ELR

[0077] APs usually have higher transmission power than non-AP STAs, which results in a large difference in downlink (DL) and uplink (UL) link budget. The DL link can refer to the link from the AP to the non-AP STA, and the UL link can refer to the link from the non-AP STA to the AP. In some cases, the difference in DL and UL link budget can reach 6 dB. Some communication standards (e.g., UHR) propose the need to improve the transmission range to address the uplink and downlink budget imbalance problem.

[0078] To address the above problems or needs, some communication technologies propose ELR technology. ELR technology can be used not only for UL but also for DL.

[0079] The data rate of ELR can be about 1.5 Mbps or about 3 Mbps.

[0080] FIG. 2 is an example diagram of the format of an ELR PPDU. As shown in FIG. 2, the ELR PPDU can include three parts: a legacy preamble, an ELR preamble, and an ELR data field.

[0081] In some implementations, the ELR PPDU bandwidth is preferably 20 MHz. The ELR PPDU can multiplex the MCS defined by the related technology.

[0082] For an ELR PPDU, a frequency domain repetition scheme for a data field is proposed in the related art to meet the requirements of transmission distance / range / signal to noise ratio (SNR). For example, for an ELR PPDU, frequency domain repetition can be performed on the data field in the 12) frequency domain repetition stage described above. The related art also compares the packet error rate (PER) performance of the data field of the ELR PPDU after performing frequency domain repetition and the conventional preamble.

[0083] As can be seen from the above, some communication technologies (such as ELR) can perform frequency domain repetition on a data field. The present inventors have found that when a data field is repeated in the frequency domain, the PAPR of its time domain signal increases, causing the signal to enter the nonlinear region of the power amplifier, resulting in nonlinear distortion of the signal and affecting the performance of the transmitted signal.

[0084] FIG. 3 is a schematic flowchart of a wireless communication method provided by an embodiment of the present application to solve the above problems.

[0085] The method shown in FIG. 3 can be performed by a first device and a second device. Both the first device and the second device can be the communication device described above. For example, the first device can be a non-AP STA, and the second device can be an AP. The first device can transmit a signal to the second device for uplink transmission. For another example, the first device can be an AP, and the second device can be a non-AP STA. The first device can transmit a signal to the second device for downlink transmission. For another example, both the first device and the second device can be non-AP STAs, i.e., the first device and the second device can be peer STAs.

[0086] The method shown in FIG. 3 can include step S310.

[0087] In step S310, the first device transmits a first PPDU to the second device.

[0088] The data field of the first PPDU can be carried by a plurality of frequency domain parts. The plurality of frequency domain parts include, for example, a first frequency domain part and a second frequency domain part. When the number of the plurality of frequency domain parts is more than 2, the plurality of frequency domain parts can further include a third frequency domain part, etc. For example, when the number of the plurality of frequency domain parts is 8, the plurality of frequency domain parts include, for example, a first frequency domain part, a second frequency domain part, a third frequency domain part, a fourth frequency domain part, a fifth frequency domain part, a sixth frequency domain part, a seventh frequency domain part, and an eighth frequency domain part.

[0089] The plurality of frequency domain parts include repeated data. That is, the data carried by each frequency domain part can be repeated. Alternatively, the data field can be repeated in the frequency domain with the frequency domain part as the granularity.

[0090] For example, in the process of constructing the data field of the first PPDU, the data field can be encoded, modulated and constellation mapped according to a certain MCS in the first frequency domain part, and then the data of the first frequency domain part is copied to the second frequency domain part.

[0091] The data field is copied in the frequency domain with the frequency domain part as the granularity, which can improve the SNR gain and thus increase the transmission range / distance.

[0092] It should be noted that in the present application, the data field and the data are different concepts. The data is the content or effective information that needs to be transmitted by the first PPDU. The data field is the field in the first PPDU that carries the data. In the present application, the data field is the field that carries the repeated data. That is, the data transmitted by the first PPDU can be repeated multiple times, and the repeated multiple times of data can be carried in the data field of the first PPDU.

[0093] In some embodiments, the first PPDU can be an ELR PPDU. That is, the present application can be applied in the case of ELR PPDU data field frequency domain replication. By the phase rotation of the multiple frequency domain parts proposed in the present application, the PAPR caused by the periodicity of the ELR PPDU due to the frequency domain replication can be reduced.

[0094] The bandwidth of the first PPDU can be a first bandwidth. The present application does not limit the size of the first bandwidth. For example, the first bandwidth is 20MHz or 40MHz.

[0095] In some embodiments, the bandwidth of the first PPDU is 20MHz, and the number of the multiple frequency domain parts can be 2, 4 or 8. That is, in the case of a 20MHz PPDU, the frequency domain replication scheme can be repeated 8 times, 4 times or 2 times. It can be understood that the more the frequency domain replication times, the more the SNR gain, but the lower the data rate, and the spectrum utilization is also reduced. In the case of a 20MHz first PPDU, the repetition times of the frequency domain replication are 8 times, 4 times or 2 times, which can balance the data rate and the frequency domain replication gain.

[0096] In some embodiments, the bandwidth of the first PPDU is 40MHz, and the number of the multiple frequency domain parts can be 2, 4, 8 or 16. That is, in the case of a 40MHz first PPDU, the frequency domain replication scheme can be repeated 16 times, 8 times, 4 times or 2 times. The repetition times described above can balance the data rate and the frequency domain replication gain of the 40MHz first PPDU.

[0097] The present application proposes the following two ways to divide the frequency domain resources occupied by the multiple frequency domain parts. The following will be described respectively.

[0098] In a first mode, the frequency domain resources occupied by the plurality of frequency domain parts are obtained by equally dividing the first bandwidth

[0099] In the second mode, the first bandwidth can be A MHz, and the number of the plurality of frequency domain parts can be B, and each of the plurality of frequency domain parts occupies A / B MHz. A and B are both positive integers.

[0100] For example, taking 20 MHz as the first bandwidth, in the case where the number of the plurality of frequency domain parts carrying the data field is 2, the frequency domain resources occupied by the plurality of frequency domain parts are 10 MHz respectively. Exemplarily, the plurality of frequency domain parts are a first frequency domain part and a second frequency domain part. The first frequency domain part can be 10 MHz of lower frequency, and the second frequency domain part can be 10 MHz of higher frequency. Alternatively, the first frequency domain part can be 10 MHz of higher frequency, and the second frequency domain part can be 10 MHz of lower frequency.

[0101] For another example, taking 20 MHz as the first bandwidth, in the case where the number of the plurality of frequency domain parts carrying the data field is 4, the frequency domain resources occupied by the plurality of frequency domain parts are 5 MHz respectively. Exemplarily, the plurality of frequency domain parts are a first frequency domain part to a fourth frequency domain part. The first frequency domain part to the fourth frequency domain part can be 5 MHz of frequency from low to high respectively. Alternatively, the first frequency domain part to the fourth frequency domain part can be 5 MHz of frequency from high to low respectively.

[0102] For another example, taking 20 MHz as the first bandwidth, in the case where the number of the plurality of frequency domain parts carrying the data field is 8, the frequency domain resources occupied by the plurality of frequency domain parts are 2.5 MHz respectively. Exemplarily, the plurality of frequency domain parts are a first frequency domain part to an eighth frequency domain part. The first frequency domain part to the eighth frequency domain part can be 2.5 MHz of frequency from low to high respectively. Alternatively, the first frequency domain part to the eighth frequency domain part can be 2.5 MHz of frequency from high to low respectively.

[0103] For another example, taking 40 MHz as the first bandwidth, in the case where the number of the plurality of frequency domain parts carrying the data field is 4, the frequency domain resources occupied by the plurality of frequency domain parts are 10 MHz respectively. Exemplarily, the plurality of frequency domain parts are a first frequency domain part to a fourth frequency domain part. The first frequency domain part to the fourth frequency domain part can be 10 MHz of frequency from low to high respectively. Alternatively, the first frequency domain part to the fourth frequency domain part can be 10 MHz of frequency from high to low respectively.

[0104] For example, in the case that the first PPDU has a bandwidth of 40MHz and the number of the plurality of frequency domain parts is 8, the frequency domain resources occupied by the plurality of frequency domain parts are 5MHz respectively. For example, the plurality of frequency domain parts are the first frequency domain part to the eighth frequency domain part. The first frequency domain part to the eighth frequency domain part can be 5MHz respectively from low to high frequency. Alternatively, the first frequency domain part to the eighth frequency domain part can be 5MHz respectively from high to low frequency.

[0105] It can be understood that the first mode is simpler and easier to calculate.

[0106] In the second mode, the frequency domain resources occupied by the plurality of frequency domain parts are indicated by one or more RUs.

[0107] In the second mode, the frequency domain resources occupied by the frequency domain parts can be indicated by the index of the RU.

[0108] In the second mode, the RU can be an RRU.

[0109] For example, in the case that the first PPDU has a bandwidth of 20MHz and the number of the plurality of frequency domain parts is 2, the frequency domain resources occupied by the plurality of frequency domain parts are indicated by 106-tone RUs or 52+26-tone MRUs. For example, the first frequency domain part and the second frequency domain part can be 106-tone RRU 1 and 106-tone RRU 2 respectively. Alternatively, the first frequency domain part and the second frequency domain part can be 106-tone RRU 2 and 106-tone RRU 1 respectively. For example, the first frequency domain part and the second frequency domain part are 52+26-tone RMRU 1 and 52+26-tone RMRU 2 respectively. Alternatively, the first frequency domain part and the second frequency domain part are 52+26-tone RMRU 2 and 52+26-tone RMRU 1 respectively.

[0110] For example, in the case that the first PPDU has a bandwidth of 20MHz and the number of the plurality of frequency domain parts is 4, the frequency domain resources occupied by the plurality of frequency domain parts are indicated by 52-tone RUs. For example, any one of the first frequency domain part to the fourth frequency domain part can be 52-tone RRU 1, 52-tone RRU 2, 52-tone RRU 3 or 52-tone RRU 4, and the first frequency domain part to the fourth frequency domain part are not the same. As a possible implementation, the first frequency domain part to the fourth frequency domain part can be 52-tone RRU 1, 52-tone RRU 2, 52-tone RRU 3 and 52-tone RRU 4 respectively.

[0111] For example, in the case that the bandwidth of the first PPDU is 20MHz and the number of the plurality of frequency domain parts is 8, the frequency domain resources occupied by the plurality of frequency domain parts are all represented by 26-tone RUs. For example, any one of the first frequency domain part to the eighth frequency domain part can be any one of 26-tone RRU 1, 26-tone RRU 2, 26-tone RRU 3, and 26-tone RRU 4, 26-tone RRU 6, 26-tone RRU 7, 26-tone RRU 8, and 26-tone RRU 9, and the first frequency domain part to the eighth frequency domain part are all different. As a possible implementation, the first frequency domain part to the eighth frequency domain part can be 26-tone RRU 1, 26-tone RRU 2, 26-tone RRU 3, and 26-tone RRU 4, 26-tone RRU 6, 26-tone RRU 7, 26-tone RRU 8, 26-tone RRU 9, respectively.

[0112] In some embodiments, the copying operation of the repeated data can be performed based on the output after the steps of one or more of 1) to 11) of the constructing data field described above.

[0113] For example, the copying operation of the repeated data is performed based on the output after one or more of the following steps: encoding, modulation, constellation mapping, segment de-parsing.

[0114] For example, the data field of the first PPDU is encoded, modulated, and constellation mapped according to a certain MCS on the first frequency domain part, and then the data of the first frequency domain part is copied to other frequency domain parts. For example, in the case of 8 frequency domain parts (copying 8 times), the data of the first frequency domain part is copied to the second frequency domain part, the third frequency domain part, the fourth frequency domain part, the fifth frequency domain part, the sixth frequency domain part, the seventh frequency domain part, and the eighth frequency domain part, respectively. For example, in the case of 4 frequency domain parts (copying 4 times), the data of the first frequency domain part is copied to the second frequency domain part, the third frequency domain part, and the fourth frequency domain part, respectively. For example, in the case of 2 frequency domain parts (copying 2 times), the data of the first frequency domain part is copied to the second frequency domain part. Then, a certain phase rotation is applied to the data field of each frequency domain part copied in the frequency domain.

[0115] The present application does not limit the modulation method used by the encoding and / or modulation. In the case of different copying times, the following modulation methods are proposed in the present application, which can meet the data rate requirement of the first PPDU, for example, the data rate requirement of 1.5 Mbps.

[0116] For example, in the case that the number of the plurality of frequency domain portions is 2 (i.e., repetition 2 times), the data field is encoded and / or modulated according to a first MCS, which can include: BPSK-DCM modulation, 1 / 2 code rate, and / or, BPSK modulation, 1 / 2 code rate.

[0117] For example, in the case that the number of the plurality of frequency domain portions is 4 (i.e., repetition 4 times), the data field is encoded and / or modulated according to a second MCS, which can include BPSK modulation, 1 / 2 code rate.

[0118] For example, in the case that the number of the plurality of frequency domain portions is 8 (i.e., repetition 8 times), the data field is encoded and / or modulated according to a third MCS, which can include: QPSK modulation, 1 / 2 code rate, and / or, QPSK modulation, 3 / 4 code rate.

[0119] In the present application, the repeated data is mapped to the plurality of frequency domain portions by phase rotation. By phase rotation, the PAPR caused by periodicity due to frequency domain replication can be reduced.

[0120] In some embodiments, the phase rotation can be determined by multiplying a phase rotation coefficient. That is, the repeated data can be mapped to the plurality of frequency domain portions after multiplying the phase rotation coefficient. For example, the subcarriers contained in the frequency domain portions can be multiplied by the phase rotation coefficient. The phase rotation coefficient may, for example, include 1 or -1.

[0121] Exemplarily, one frequency domain portion can correspond to one phase rotation coefficient. The subcarriers contained in the frequency domain portion can be multiplied by the corresponding phase rotation coefficient.

[0122] Examples 1.1 and 1.2 below take the cases of repetition 8 times and 4 times as examples to respectively illustrate how to implement phase rotation based on phase rotation coefficients.

[0123] Example 1.1, repetition 8 times

[0124] In Example 1.1, the number of the plurality of frequency domain portions carrying the first PPDU data field can be 8. The 8 frequency domain portions are the first frequency domain portion to the eighth frequency domain portion.

[0125] The phase rotation coefficients corresponding to the 8 frequency domain portions can be a0 to a7. Applying a certain phase rotation to the data field of each frequency domain portion of the frequency domain replication can be implemented by the following 8 equations.

[0126] wherein d k，m，n，r，u may represent the output of the first frequency domain part from the de-parsing of the segmentation. may represent the output of the first frequency domain part to the eighth frequency domain part after the frequency domain copying and the phase rotation.

[0127] The following descriptions of various parameters can be applied in any embodiment contained in the present application, and the following descriptions are not repeated.

[0128] k can satisfy: k = 0, 1, …, N SD,u m can satisfy: m = 1, 2, …, N SS,r,u n can satisfy: n = 0, 1, …, N SYM r can satisfy: r = 0, 1, …, N RU u can satisfy: u = 0, 1, …, N user,r wherein N SD,u may represent the effective number of data tones carrying unique data of the user u. N SS,r,u may represent the number of spatial streams of the user u on the rth RU / MRU, u = 0, 1, …, N user,r N SYM may represent the number of OFDM symbols. N RU may represent the number of RUs / MRUs occupied in the transmission; or represent the number of frequency domain parts occupied in the transmission. N user,r may represent the total number of users on the rth RU / MRU occupied in the transmission.

[0129] Example 1.2, repeated 4 times

[0130] In example 1.2, the number of frequency domain parts carrying the first PPDU data field can be 4. The 4 frequency domain parts are the first frequency domain part to the fourth frequency domain part.

[0131] The phase rotation coefficients corresponding to the 4 frequency domain parts are b0 to b3. Applying a certain phase rotation to the data field of each frequency domain part of the frequency domain copying can be implemented by the following 4 equations.

[0132] d k,m,n,r,u may represent the output of the first frequency domain part from the de-parsing of the segmentation. ​​The output of the first to fourth frequency domain parts after copying and phase rotation can be represented.

[0133] In some embodiments, the same phase rotation coefficient can be multiplied to the subcarriers included in the same frequency domain part. For example, the subcarriers included in the first frequency domain part can be multiplied by the first phase rotation coefficient. As in Example 1.1, the subcarriers of the first frequency domain part are multiplied by a0; the subcarriers of the second frequency domain part are multiplied by a1; the subcarriers of the third frequency domain part are multiplied by a2; the subcarriers of the fourth frequency domain part are multiplied by a3; the subcarriers of the fifth frequency domain part are multiplied by a4; the subcarriers of the sixth frequency domain part are multiplied by a5; the subcarriers of the seventh frequency domain part are multiplied by a6; and the subcarriers of the eighth frequency domain part are multiplied by a7. As in Example 1.2, the subcarriers of the first frequency domain part are multiplied by b0; the subcarriers of the second frequency domain part are multiplied by b1; the subcarriers of the third frequency domain part are multiplied by b2; and the subcarriers of the fourth frequency domain part are multiplied by b3.

[0134] Optionally, different phase rotations can be applied to different frequency domain parts. For example, for the plurality of frequency domain parts included in the first PPDU, the phase rotation coefficients of at least 2 of the frequency domain parts are different. For example, the subcarriers included in the first frequency domain part can be multiplied by the first phase rotation coefficient, and the subcarriers included in the second frequency domain part can be multiplied by the second phase rotation coefficient. The first phase rotation coefficient and the second phase rotation coefficient can be different. For example, the first phase rotation coefficient is 1, and the second phase rotation coefficient is -1.

[0135] Taking Example 1.1 as an example, a0 to a7 are not all the same. For example, at least one of a0 to a7 takes the first phase rotation coefficient, and at least one of a0 to a7 takes the second phase rotation coefficient. The first phase rotation coefficient and the second phase rotation coefficient are different. For example, the first phase rotation coefficient is 1, and the second phase rotation coefficient is -1. Or, the first phase rotation coefficient is -1, and the second phase rotation coefficient is 1.

[0136] Taking Example 1.2 as an example, b0 to b3 are not all the same. For example, at least one of b0 to b3 takes the first phase rotation coefficient, and at least one of b0 to b3 takes the second phase rotation coefficient. The first phase rotation coefficient and the second phase rotation coefficient are described as above.

[0137] In some embodiments, a frequency domain part can include a plurality of subcarrier groups. That is, one frequency domain part can be divided into a plurality of subcarrier groups. For example, one frequency domain part can be divided into 2 subcarrier groups. A subcarrier group can include one or more subcarriers. The number of subcarriers in the plurality of subcarrier groups included in one frequency domain part can be the same.

[0138] In some embodiments, phase rotation can be applied for subcarrier groups. One subcarrier group can correspond to one phase rotation coefficient, and the subcarriers included in the subcarrier group can be multiplied by the corresponding phase rotation coefficient. In this case, one frequency domain part can correspond to multiple phase rotation coefficients. Which phase rotation coefficient a subcarrier in a frequency domain part is multiplied by can depend on which subcarrier group the subcarrier belongs to corresponds to which phase rotation coefficient.

[0139] For ease of understanding, example 1.3 is repeated twice, and example 1.4 is repeated four times to illustrate subcarrier groups and corresponding phase rotation coefficients.

[0140] Example 1.3, repeated twice

[0141] In example 1.3, the number of frequency domain parts carrying the first PPDU data field can be 2, i.e., repeated twice. One frequency domain part includes 2 subcarrier groups. The 4 subcarrier groups included in the 2 frequency domain parts correspond to phase rotation coefficients c0 to c3, respectively.

[0142] Considering that for each RU / MRU or frequency domain part, N SD,u The value N SD,u with DCM (when applicable) is half of the value without DCM, for each RU or MRU size, therefore, the present application provides corresponding implementations for DCM and non-DCM.

[0143] For the case of DCM, applying a certain phase rotation to the data field of each frequency domain part of the frequency domain copy can be achieved by the following two equations.

[0144] For the case of non-DCM, applying a certain phase rotation to the data field of each frequency domain part of the frequency domain copy can be achieved by the following two equations.

[0145] d k,m,n,r,u , can represent the output of the first frequency domain part from the de-parsing of the segment. and can represent the output of the first frequency domain part and the second frequency domain part after copying and phase rotation.

[0146] Example 1.4

[0147] In Example 1.4, the number of frequency domain parts carrying the first PPDU data field can be 4, i.e., repeated 4 times. The frequency domain part includes 2 subcarrier groups. The 4 frequency domain parts contain 8 subcarrier groups corresponding to phase rotation coefficients a0 to a7, respectively.

[0148] For the case of DCM (e.g., the MCS of the data field is BPSK-DCM), applying certain phase rotation to the data field of each frequency domain part of the frequency domain replication can be implemented by the following 4 equations.

[0149] For the case of non-DCM, applying certain phase rotation to the data field of each frequency domain part of the frequency domain replication can be implemented by the following 4 equations.

[0150] d k,m,n,r,u , can represent the output of the first frequency domain part from the de-parsing of the segmentation. , can represent the output of the first frequency domain part to the fourth frequency domain part after the replication and phase rotation.

[0151] Optionally, for different subcarrier groups of the same frequency domain part, different phase rotations can be applied. For example, for the first frequency domain part including a plurality of subcarrier groups, the phase rotation coefficients of at least two subcarrier groups are different. Illustratively, the first frequency domain part can include a first subcarrier group and a second subcarrier group. Among them, the subcarriers included in the first subcarrier group can be multiplied by a third phase rotation coefficient, and the subcarriers included in the second subcarrier group can be multiplied by a fourth phase rotation coefficient. Among them, the third phase rotation coefficient and the fourth phase rotation coefficient can be different. For example, the third phase rotation coefficient is 1, and the fourth phase rotation coefficient is -1. Or, the third phase rotation coefficient is -1, and the fourth phase rotation coefficient is 1.

[0152] Taking Example 1.3 as an example, c0 and c1 can be different. For example, c0 can be equal to 1, and c1 can be equal to -1. Or, c0 can be equal to -1, and c1 can be equal to 1. c2 and c3 can be different. For example, c2 can be equal to 1, and c3 can be equal to -1. Or, c2 can be equal to -1, and c3 can be equal to 1.

[0153] ​Optionally, the same phase rotation can be applied to different subcarrier groups of the same frequency domain part. Continuing with the example that the first frequency domain part includes the first subcarrier group and the second subcarrier group, the first phase rotation coefficient and the second phase rotation coefficient can be the same. In this case, different subcarrier groups in other frequency domain parts included by the first PPDU can be applied with different phase rotations. For example, the third subcarrier group and the fourth subcarrier group included by the second frequency domain part can be applied with different phase rotations. Illustratively, the subcarriers included by the third subcarrier group can be multiplied by a fifth phase rotation coefficient, and the subcarriers included by the fourth subcarrier group can be multiplied by a sixth phase rotation coefficient. Wherein, the fifth phase rotation coefficient and the sixth phase rotation coefficient can be different. For example, the fifth phase rotation coefficient is 1, and the sixth phase rotation coefficient is -1. Or, the fifth phase rotation coefficient is -1, and the sixth phase rotation coefficient is 1.

[0154] Taking Example 1.3 as an example, c0 and c1 can be the same. For example, c0 and c1 can both be equal to 1 or -1. Or, c0 and c1 can both be equal to 1 or -1. In this case, c2 and c3 are different.

[0155] It can be understood that the phase rotation can be taken as the granularity of the frequency domain part (i.e., the same phase rotation is applied to the subcarriers in the same frequency domain part), or as the granularity of other frequency domain units (e.g., subcarrier groups (i.e., the same phase rotation is applied to the subcarriers in the same subcarrier group)). Regardless of which granularity the phase rotation is applied to, applying different phase rotations to the repeated data can reduce the PAPR caused by frequency domain replication to a certain extent.

[0156] In some embodiments, the plurality of frequency domain parts carrying the data field of the first PPDU can be divided into a plurality of groups. Each group can include one or more frequency domain parts, and each frequency domain part can correspond to one or more phase rotation coefficients. Then, one group can correspond to a plurality of phase rotation coefficients, and the plurality of phase rotation coefficients can constitute a phase rotation coefficient group. For example, the plurality of groups can include a first group and a second group. The first group can correspond to a first phase rotation coefficient group, and the second group can correspond to a second phase rotation coefficient group.

[0157] For example, the data field of the first PPDU can be carried by 8 frequency domain parts. The 8 frequency domain parts can be divided into two groups. The first group includes 4 frequency domain parts, and the second group includes another 4 frequency domain parts. Illustratively, the first group can include the first 4 frequency domain parts from low to high in frequency, and the second group can include the last 4 frequency domain parts from low to high in frequency. The first phase rotation coefficient group corresponding to the first group can include 4 phase rotation coefficients, and the second phase rotation coefficient group corresponding to the second group can include 4 phase rotation coefficients.

[0158] For example 1.1, the first frequency domain part to the fourth frequency domain part can belong to a first group, and the fifth frequency domain part to the eighth frequency domain part can belong to a second group. The first group can correspond to a first phase rotation coefficient group including a0 to a3, and the second group can correspond to a second phase rotation coefficient group including a4 to a7.

[0159] For example, the data field of the first PPDU can be carried by 4 frequency domain parts. Each frequency domain part can be divided into 2 subcarrier groups. The 4 frequency domain parts can be divided into two groups, i.e., the 8 subcarrier groups can be divided into two groups. A first group includes 4 subcarrier groups, and a second group includes another 4 subcarrier groups. For example, the first group can include the first 4 subcarrier groups from low to high in frequency, and the second group can include the last 4 subcarrier groups from low to high in frequency. The first group can correspond to a first phase rotation coefficient group including 4 phase rotation coefficients, and the second group can correspond to a second phase rotation coefficient group including 4 phase rotation coefficients.

[0160] For example 1.4, the first frequency domain part and the second frequency domain part can belong to a first group, and the third frequency domain part and the fourth frequency domain part can belong to a second group. The first group can correspond to a first phase rotation coefficient group including a0 to a3, and the second group can correspond to a second phase rotation coefficient group including a4 to a7.

[0161] The first phase rotation coefficient group and the second phase rotation coefficient group can satisfy: the first phase rotation coefficient group is not completely same as the second phase rotation coefficient group; or, the first phase rotation coefficient group is not mirror image of the second phase rotation coefficient group. The not completely same can mean that an Nth phase rotation coefficient included in the first phase rotation coefficient group is different from an Nth phase rotation coefficient included in the second phase rotation coefficient group. N can be a positive integer. N can be less than or equal to the number of coefficients in the first phase rotation coefficient group. The not mirror image can mean that a positive Mth phase rotation coefficient included in the first phase rotation coefficient group is different from a negative Mth phase rotation coefficient included in the second phase rotation coefficient group. M can be a positive integer. M can be less than or equal to the number of coefficients in the first phase rotation coefficient group.

[0162] For example, if the first phase rotation coefficient group has a value of [-1, 1, 1, 1] (the elements in which may, for example, correspond to the values of a0 to a3 in example 1.1), and the second phase rotation coefficient group is [-1, 1, 1, 1] (the elements in which may, for example, correspond to the values of a4 to a7 in example 1.1), the first phase rotation coefficient group and the second phase rotation coefficient group are completely same. If the first phase rotation coefficient group is [-1, 1, 1, 1], and the second phase rotation coefficient group is [1, -1, 1, 1], the first phase rotation coefficient group and the second phase rotation coefficient group are not completely same.

[0163] Exemplarily, if the first phase rotation coefficient group is [-1, 1, 1, 1] and the second phase rotation coefficient group is [1, 1, 1, -1], the first phase rotation coefficient group and the second phase rotation coefficient group are mirror images. If the first phase rotation coefficient group is [-1, 1, 1, 1] and the second phase rotation coefficient group is [1, -1, 1, 1], the first phase rotation coefficient group and the second phase rotation coefficient group are not mirror images.

[0164] Grouping the phase rotation coefficients and setting the phase rotation coefficients between the groups to be not all the same or not mirror images can reduce the PAPR to a certain extent.

[0165] In some embodiments, part or all of the plurality of phase rotation coefficients corresponding to the first group can be different, i.e., part or all of the plurality of phase rotation coefficients are different. Part or all of the plurality of phase rotation coefficients being different can mean that the plurality of phase rotation coefficients corresponding to the first group are not all the same value. For example, if the first phase rotation coefficient group is not [1, 1, 1, 1] or [-1, -1, -1, -1], part or all of the plurality of phase rotation coefficients are different.

[0166] Grouping the plurality of frequency domain parts and setting the phase rotation coefficients in the groups to be not all the same can reduce the PAPR to a certain extent.

[0167] In some embodiments, in the plurality of phase rotation coefficients corresponding to the first group, one phase rotation coefficient is a first value and the remaining phase rotation coefficients are a second value. The first value and the second value are different. For example, the first value is -1 and the second value is 1. In the first phase rotation coefficient group, one can be -1 and the remaining can be 1. For example, the first phase rotation coefficient group can be [-1, 1, 1, 1], [1, -1, 1, 1], [1, 1, -1, 1], or [1, 1, 1, -1]. For example, the first value is 1 and the second value is -1. In the first phase rotation coefficient group, one can be 1 and the remaining can be -1. For example, the first phase rotation coefficient group can be [-1, -1, -1, 1], [-1, -1, 1, -1], [-1, 1, -1, -1], or [1, -1, -1, -1].

[0168] As described above, the number of the plurality of frequency domain parts carrying the data field of the first PPDU can be 2, 4, or 8 (i.e., the number of repetitions of frequency domain repetition is 2, 4, or 8). The following describes the setting of the phase rotation coefficient in the three cases respectively.

[0169] Example 2.1

[0170] In Example 2.1, the number of frequency domain portions carrying the first PPDU data field can be 8. The 8 frequency domain portions can correspond to the 8 frequency domain portions in Example 1.1. The phase rotation coefficients corresponding to the 8 frequency domain portions can be a0to a7, respectively.

[0171] Alternatively, in Example 2.1, the number of frequency domain portions carrying the first PPDU data field can be 4. The 4 frequency domain portions can correspond to the 4 frequency domain portions in Example 1.4. Each of the frequency domain portions can include 2 subcarrier groups, i.e., a total of 8 subcarrier groups. The phase rotation coefficients corresponding to the 8 subcarrier groups can be a0to a7, respectively.

[0172] a0to a7may satisfy:

[0173] a0= -1, a1= 1, a2= 1, a3= 1, a4= 1, a5= -1, a6= 1, a7= 1;

[0174] a0= -1, a1= 1, a2= 1, a3= 1, a4= 1, a5= 1, a6= -1, a7= 1;

[0175] a0= 1, a1= -1, a2= 1, a3= 1, a4= -1, a5= 1, a6= 1, a7= 1;

[0176] a0= 1, a1= -1, a2= 1, a3= 1, a4= 1, a5= 1, a6= 1, a7= -1;

[0177] a0= 1, a1= 1, a2= -1, a3= 1, a4= -1, a5= 1, a6= 1, a7= 1;

[0178] a0= 1, a1= 1, a2= -1, a3= 1, a4= 1, a5= 1, a6= 1, a7= -1;

[0179] a0= 1, a1= 1, a2= 1, a3= -1, a4= 1, a5= -1, a6= 1, a7= 1;

[0180] a0= 1, a1= 1, a2= 1, a3= -1, a4= 1, a5= 1, a6= -1, a7= 1;

[0181] a0= 1, a1= -1, a2= -1, a3= -1, a4= -1, a5= 1, a6= -1, a7= -1;

[0182] a0= 1, a1= -1, a2= -1, a3= -1, a4= -1, a5= -1, a6= 1, a7= -1;

[0183] a0= -1, a1= 1, a2= -1, a3= -1, a4= 1, a5= -1, a6= -1, a7= -1 ;

[0184] a0= -1, a1= 1, a2= -1, a3= -1, a4= -1, a5= -1, a6= -1, a7= 1 ;

[0185] a0= -1, a1= -1, a2= 1, a3= -1, a4= 1, a5= -1, a6= -1, a7= -1 ;

[0186] a0= -1, a1= -1, a2= 1, a3= -1, a4= -1, a5= -1, a6= -1, a7= 1 ;

[0187] a0= -1, a1= -1, a2= -1, a3= 1, a4= -1, a5= 1, a6= -1, a7= -1 ;

[0188] a0= -1, a1= -1, a2= -1, a3= 1, a4= -1, a5= -1, a6= 1, a7= -1 ;

[0189] a0= -1, a1= 1, a2= 1, a3= 1, a4= -1, a5= 1, a6= -1, a7= -1 ;

[0190] a0= -1, a1= 1, a2= 1, a3= 1, a4= -1, a5= -1, a6= 1, a7= -1 ;

[0191] a0= 1, a1= -1, a2= 1, a3= 1, a4= 1, a5= -1, a6= -1, a7= -1 ;

[0192] a0= 1, a1= -1, a2= 1, a3= 1, a4= -1, a5= -1, a6= -1, a7= 1 ;

[0193] a0= 1, a1= 1, a2= -1, a3= 1, a4= 1, a5= -1, a6= -1, a7= -1 ;

[0194] a0= 1, a1= 1, a2= -1, a3= 1, a4= -1, a5= -1, a6= -1, a7= 1 ;

[0195] a0= 1, a1= 1, a2= 1, a3= -1, a4= -1, a5= 1, a6= -1, a7= -1 ; or

[0196] a0= 1, a1= 1, a2= 1, a3= -1, a4= -1, a5= -1, a6= 1, a7= -1.

[0197] It can be seen that a0 to a7 are not all identical, i.e., a0 to a7 are not all equal to 1 and a0 to a7 are not all equal to -1.

[0198] The first set of corresponding first phase rotation coefficient groups can include a0 to a3, and the second set of corresponding second phase rotation coefficient groups can include a4 to a7. It can be seen that the phase rotation coefficients within the first phase rotation coefficient groups are different, the phase rotation coefficients within the second phase rotation coefficient groups are different, and the phase rotation coefficients contained in the first phase rotation coefficient groups and the phase rotation coefficients contained in the second phase rotation coefficient groups are different and non-mirrored.

[0199] Example 2.2

[0200] In example 2.2, the number of the plurality of frequency domain parts carrying the first PPDU data field can be 4. The 4 frequency domain parts can correspond to the 4 frequency domain parts in example 1.2. The phase rotation coefficients corresponding to the 4 frequency domain parts are b0 to b3 respectively, and b0 to b3 satisfy:

[0201] b0 = -1, b1 = 1, b2 = 1, b3 = 1;

[0202] b0 = 1, b1 = -1, b2 = 1, b3 = 1;

[0203] b0 = 1, b1 = 1, b2 = -1, b3 = 1;

[0204] b0 = 1, b1 = 1, b2 = 1, b3 = -1;

[0205] b0 = 1, b1 = -1, b2 = -1, b3 = -1;

[0206] b0 = -1, b1 = 1, b2 = -1, b3 = -1;

[0207] b0 = -1, b1 = -1, b2 = 1, b3 = -1;

[0208] Or, b0 = -1, b1 = -1, b2 = -1, b3 = 1.

[0209] Example 2.3

[0210] In example 2.3, the number of the plurality of frequency domain parts carrying the first PPDU data field can be 2. The 2 frequency domain parts can correspond to the 2 frequency domain parts in example 1.3. The frequency domain parts include 2 subcarrier groups. The phase rotation coefficients corresponding to the 4 subcarrier groups contained in the 2 frequency domain parts are c0 to c3 respectively, and c0 to c3 satisfy:

[0211] c0 = -1, c1 = 1, c2 = 1, c3 = 1;

[0212] c0=1, c1=-1, c2=1, c3=1;

[0213] c0=1, c1=1, c2=-1, c3=1;

[0214] c0=1, c1=1, c2=1, c3=-1;

[0215] c0=1, c1=-1, c2=-1, c3=-1;

[0216] c0=-1, c1=1, c2=-1, c3=-1;

[0217] c0=-1, c1=-1, c2=1, c3=-1;

[0218] or, c0=-1, c1=-1, c2=-1, c3=1.

[0219] For the convenience of understanding, the present application is described in detail in combination with Embodiment 1.1-Embodiment 3.2. In Embodiment 1.1-Embodiment 3.2, the bandwidth of the first PPDU is 20MHz.

[0220] Embodiment 1.1

[0221] Fig. 4A is an example diagram of a first PPDU provided by Embodiment 1.1.

[0222] As shown in Fig. 4A, data repetitions 0-7 correspond to first to eighth frequency domain parts respectively. Each frequency domain part occupies 2.5MHz, i.e., the frequency domain part can also be referred to as a 2.5MHz frequency domain part. After the data is encoded and modulated in the lowest first 2.5MHz frequency domain part, it is copied to the second to eighth 2.5MHz frequency domain parts respectively, while the multiplication of each subcarrier in the first, second, third, fifth, seventh and eighth 2.5MHz frequency domain parts is multiplied by 1, and the multiplication of each subcarrier in the fourth and sixth 2.5MHz frequency domain parts is multiplied by -1. That is, the phase rotation coefficients of the eight 2.5MHz frequency domain parts are [1, 1, 1, -1, 1, -1, 1, 1].

[0223] Embodiment 1.2

[0224] Fig. 4B is an example diagram of a first PPDU provided by Embodiment 1.2.

[0225] As shown in FIG. 4B, 26-tone RRUs repeat 0 to 7 correspond to the first frequency domain part to the eighth frequency domain part respectively. Data is encoded and modulated in the lowest first 26-tone RRU, which is copied to the second to eighth 26-tone RRUs respectively, while multiplied by 1 at each subcarrier of the first, seventh 26-tone RRUs, and multiplied by -1 at each subcarrier of the second, third, fourth, fifth, sixth, and eighth 26-tone RRUs. That is, the phase rotation coefficients of the eight 26-tone RRUs are [1, -1, -1, -1, -1, -1, 1, -1].

[0226] Embodiment 2.1

[0227] FIG. 5A is an example diagram of a first PPDU provided by Embodiment 2.1.

[0228] As shown in FIG. 5A, data repeats 0 to 3 correspond to the first frequency domain part to the fourth frequency domain part respectively. Each frequency domain part occupies 5MHz, that is, the frequency domain part can also be referred to as a 5MHz frequency domain part. Data is encoded and modulated in the lowest first 5MHz frequency domain part, which is copied to the second to fourth 5MHz frequency domain parts respectively, while multiplied by 1 at each subcarrier of the first, second, and third 5MHz frequency domain parts, and multiplied by -1 at each subcarrier of the fourth 5MHz frequency domain part. That is, the phase rotation coefficients of the four 5MHz frequency domain parts are [1, 1, 1, -1].

[0229] Embodiment 2.2

[0230] FIG. 5B is an example diagram of a first PPDU provided by Embodiment 2.2.

[0231] As shown in FIG. 5B, 52-tone RRUs repeat 0 to 3 correspond to the first frequency domain part to the fourth frequency domain part respectively. Data is encoded and modulated in the lowest first 52-tone RRU, which is copied to the second to fourth 52-tone RRUs respectively, while multiplied by 1 at each subcarrier of the first 52-tone RRU, and multiplied by -1 at each subcarrier of the second, third, and fourth 52-tone RRUs. That is, the phase rotation coefficients of the four 52-tone RRUs are [1, -1, -1, -1].

[0232] Embodiment 3.1

[0233] FIG. 6A is an example diagram of a first PPDU provided by Embodiment 3.1.

[0234] As shown in FIG. 6A, data repetition 0 and 1 correspond to a first frequency domain portion and a second frequency domain portion, respectively. Each of the frequency domain portions occupies 10 MHz, i.e., the frequency domain portions can also be referred to as 10 MHz frequency domain portions. Data is encoded and modulated in the lowest first 10 MHz frequency domain portion, which is copied to the second 10 MHz frequency domain portion. Among them, the lower half of the subcarriers in the first 10 MHz frequency domain portion belongs to a subcarrier group (i.e., data repetition 0 - part 1 in FIG. 6A). The subcarriers in data repetition 0 - part 1 are multiplied by 1, and the upper half of the subcarriers in the first 10 MHz frequency domain portion belongs to a subcarrier group (i.e., data repetition 0 - part 2 in FIG. 6A). The subcarriers in data repetition 0 - part 2 are multiplied by -1. The lower half of the subcarriers in the second 10 MHz frequency domain portion belongs to a subcarrier group (i.e., data repetition 1 - part 1 in FIG. 6A). The subcarriers in data repetition 1 - part 1 are multiplied by -1. The upper half of the subcarriers in the second 10 MHz frequency domain portion belongs to a subcarrier group (i.e., data repetition 1 - part 2 in FIG. 6A). The subcarriers in data repetition 1 - part 2 are multiplied by -1.

[0235] Embodiment 3.2

[0236] FIG. 6B is an example diagram of a first PPDU provided by embodiment 3.2.

[0237] As shown in FIG. 6B, 52+26-tone RMRU repetition 0 and 1 correspond to a first frequency domain portion and a second frequency domain portion, respectively. Data is encoded and modulated in the lowest first 52+26-tone RMRU, which is copied to the second 52+26-tone RMRU. Among them, the lower half of the subcarriers in the first 52+26-tone RMRU belongs to a subcarrier group (i.e., 52+26-tone RMRU repetition 0 - part 1 in FIG. 6B). The subcarriers in 52+26-tone RMRU repetition 0 - part 1 are multiplied by 1. The upper half of the subcarriers in the first 52+26-tone RMRU belongs to a subcarrier group (i.e., 52+26-tone RMRU repetition 0 - part 2 in FIG. 6B). The subcarriers in 52+26-tone RMRU repetition 0 - part 2 are multiplied by -1. The lower half of the subcarriers in the second 52+26-tone RMRU belongs to a subcarrier group (i.e., 52+26-tone RMRU repetition 1 - part 1 in FIG. 6B). The subcarriers in 52+26-tone RMRU repetition 1 - part 1 are multiplied by 1. The upper half of the subcarriers in the second 52+26-tone RMRU belongs to a subcarrier group (i.e., 52+26-tone RMRU repetition 1 - part 2 in FIG. 6B). The subcarriers in 52+26-tone RMRU repetition 1 - part 2 are multiplied by 1.

[0238] As described above, the bandwidth of the first PPDU can also be 40MHz, i.e., the present application can be applied to a PPDU with 40MHz bandwidth. For a first PPDU with 40MHz, if the number of repetitions is 8, the first to eighth frequency domain parts can be obtained by dividing the 40MHz equally. As shown in FIG. 7A, the first to eighth frequency domain parts are all 5MHz. For a first PPDU with 40MHz, if the number of repetitions is 4, the first to fourth frequency domain parts can be obtained by dividing the 40MHz equally. As shown in FIG. 7B, the first to fourth frequency domain parts are all 10MHz.

[0239] In some embodiments, the first PPDU can comprise a first field. The first field can be used to indicate information related to the plurality of frequency domain parts. In other words, the first field can be used to indicate information related to frequency domain duplication of the first PPDU.

[0240] In some embodiments, the first field can be used to indicate one or more of the following: the number of the plurality of frequency domain parts used to carry the data field of the first PPDU, the frequency domain resource occupied by each of the plurality of frequency domain parts.

[0241] The first field indicating the number of the plurality of frequency domain parts can be understood as the first field indicating the number of repetitions of frequency domain duplication. For example, the first field can indicate the number of repetitions is 2, 4 or 8.

[0242] As described above, the frequency domain resource occupied by each of the plurality of frequency domain parts can be represented by dividing the first bandwidth or RU equally. The first field can indicate whether the frequency domain resource occupied by each of the plurality of frequency domain parts is obtained by dividing the first bandwidth equally or represented by RU. Alternatively, the first field can indicate the bandwidth (e.g., 5MHz, 10MHz or 2.5MHz) or RU (e.g., 52-tone RU, 106-tone RU or 52+26-tone RU) occupied by the frequency domain part. That is, the first field can indicate the granularity of frequency domain duplication of the data field.

[0243] For example, the first field can be 2 bits. The first field being a first value can indicate that the data field is replicated in the frequency domain with a granularity of 2.5 MHz or 26-tone RRU. The first field being a second value can indicate that the data field is replicated in the frequency domain with a granularity of 5 MHz or 52-tone RRU. The first field being a third value can indicate that the data is replicated in the frequency domain with a granularity of 10 MHz or 106-tone RRU or 52+26-tone RMRU. A fourth value can be reserved. The first value, the second value, the third value, or the fourth value can be any value from 0 to 3, and the first value, the second value, the third value, and the fourth value are all different. For example, the first value can be 0, the second value can be 1, the third value can be 2, and the fourth value can be 3.

[0244] In some embodiments, the first field can be used to indicate a mode of frequency domain replication. The mode of frequency domain replication may, for example, indicate one or more of: a number of frequency domain portions, frequency domain resources occupied by each of the frequency domain portions, a granularity of frequency domain replication, etc.

[0245] In some embodiments, the first field can belong to a first preamble of the first PPDU. That is, the first field can be carried in a preamble of the first PPDU. For example, the first preamble can comprise an ELR preamble. That is, the first PPDU can be an ELR PPDU, and the ELR preamble can carry the first field.

[0246] In some embodiments, the first PPDU can use a fixed mode of frequency domain replication, and thus, the first field can not be needed for indication.

[0247] In some embodiments, the first PPDU only allows transmission of one spatial stream. That is, the parameter m described above is equal to 1.

[0248] In some embodiments, the first PPDU allows transmission of one or more spatial streams. That is, the parameter m described above is greater than or equal to 1.

[0249] In some embodiments, the first PPDU only allows single user (SU) transmission. That is, the parameter r or the parameter u described above is equal to 1.

[0250] In some embodiments, the first PPDU allows single user or multiple user (MU) transmission. That is, the parameter r or the parameter u described above is greater than or equal to 1.

[0251] In some embodiments, the first PPDU allows UL transmission in one or more of 2.4 GHz, 5 GHz, 6 GHz. In some other embodiments, the first PPDU allows UL transmission in 2.4 GHz, 5 GHz, 6 GHz, and the first PPDU allows DL transmission in 2.4 GHz.

[0252] The present application simulates the scheme of phase rotation when frequency domain replication is performed. The simulation results are described below.

[0253] For example 1.1, the present application simulates two cases of no phase rotation and phase rotation with phase rotation coefficient [-1, 1, 1, 1, 1, -1, 1, 1]. The simulation results are shown in FIG. 8A. As shown in FIG. 8A, the scheme of phase rotation (phase rotation with [-1, 1, 1, 1, 1, -1, 1, 1]) proposed by the present application has a PAPR gain of about 4 dB compared with the scheme of no phase rotation (no phase rotation).

[0254] For example 1.2, the present application simulates two cases of no phase rotation and phase rotation with phase rotation coefficient [1, -1, 1, 1]. The simulation results are shown in FIG. 8B. As shown in FIG. 8B, the scheme of phase rotation (phase rotation with [1, -1, 1, 1]) proposed by the present application has a PAPR gain of about 3 to 4 dB compared with the scheme of no phase rotation (no phase rotation).

[0255] For example 1.3, the present application simulates two cases of no phase rotation and phase rotation with phase rotation coefficient [-1, 1, 1, 1]. The simulation results are shown in FIG. 8C. As shown in FIG. 8C, the scheme of phase rotation (phase rotation with [-1, 1, 1, 1]) proposed by the present application has a PAPR gain of about 2 to 2.5 dB compared with the scheme of no phase rotation (no phase rotation).

[0256] It should be noted that the embodiments provided by the present application can be applied not only to the data field, but also to other fields. For example, frequency domain replication and phase rotation can be performed when other fields are constructed. The data field in the present embodiment can be replaced by other fields. Other fields may, for example, be fields in the first preamble in the first PPDU. For example, the other fields may, for example, include one or more of the following: ELR-STF, ELR-LTF, ELR-SIG field.

[0257] The method embodiments of the present application are described in detail above, and the device embodiments of the present application are described in detail below. It should be understood that the description of the method embodiments corresponds to the description of the device embodiments, and therefore, the parts not described in detail can be referred to the method embodiments.

[0258] FIG. 9 is a schematic structural diagram of a communication device 900 according to an embodiment of the present application. The communication device 900 is a first device, and the communication device includes a sending unit 910.

[0259] The sending unit 910 is configured to send a first PPDU, wherein a data field of the first PPDU is carried by a plurality of frequency domain parts, and the plurality of frequency domain parts include repeated data, and the repeated data is mapped to the plurality of frequency domain parts by phase rotation.

[0260] In the embodiments of the present application, the communication device 900 described above can be configured to perform part or all of the method steps performed by the first device in the method embodiments described above. The communication device 900 includes units or modules for performing the method steps described above. The method flow has been described in detail in the foregoing embodiments, and the modules in the present embodiment have the same functions or perform the same steps, which will not be described here in detail. However, as a person skilled in the art should know, the corresponding description of the method embodiments described above can be introduced into the present embodiment, which corresponds to the modules in the communication device 900.

[0261] In optional embodiments, the sending unit 910 can be a transceiver 1130. The communication device 900 can further include a processor 1110 and a memory 1120, as shown in FIG. 11.

[0262] FIG. 10 is a schematic structural diagram of a communication device 1000 according to an embodiment of the present application. The communication device 1000 is a second device. The communication device 1000 includes a receiving unit 1010.

[0263] The receiving unit 1010 is configured to receive a first PPDU, wherein a data field of the first PPDU is carried by a plurality of frequency domain parts, and the plurality of frequency domain parts include repeated data, and the repeated data is mapped to the plurality of frequency domain parts by phase rotation.

[0264] In the embodiments of the present application, the communication device 1000 described above can be configured to perform part or all of the method steps performed by the second device in the method embodiments described above. The communication device 1000 includes units or modules for performing the method steps described above. The method flow has been described in detail in the foregoing embodiments, and the modules in the present embodiment have the same functions or perform the same steps, which will not be described here in detail. However, as a person skilled in the art should know, the corresponding description of the method embodiments described above can be introduced into the present embodiment, which corresponds to the modules in the communication device 1000.

[0265] In an optional embodiment, the receiving unit 1010 can be a transceiver 1130. The communication device 1000 can further include a processor 1110 and a memory 1120, as shown in FIG. 11.

[0266] FIG. 11 is a schematic structural diagram of an apparatus for communication according to an embodiment of the present application. The dashed line in FIG. 11 indicates that the unit or module is optional. The apparatus 1100 can be used to implement the method described in the above method embodiments. The apparatus 1100 can be a chip or a communication device.

[0267] The apparatus 1100 can include one or more processors 1110. The processor 1110 can support the apparatus 1100 to implement the method described in the above method embodiments. The processor 1110 can be a general purpose processor or a dedicated processor. For example, the processor can be a central processing unit (CPU). Alternatively, the processor can also be other general purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic, discrete hardware components, etc. The general purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0268] The apparatus 1100 can further include one or more memories 1120. The memory 1120 stores a program, which can be executed by the processor 1110, so that the processor 1110 performs the method described in the above method embodiments. The memory 1120 can be independent of the processor 1110 or integrated in the processor 1110.

[0269] The apparatus 1100 can further include a transceiver 1130. The processor 1110 can communicate with other devices or chips through the transceiver 1130. For example, the processor 1110 can perform data transceiving with other devices or chips through the transceiver 1130.

[0270] The embodiments of the present application further provide a computer readable storage medium for storing a program. The computer readable storage medium can be applied to the communication device provided by the embodiments of the present application, and the program causes the computer to execute the method performed by the communication device in the embodiments of the present application.

[0271] The embodiment of the present application further provides a computer program product. The computer program product comprises a program. The computer program product can be applied to the communication device provided by the embodiment of the present application, and the program causes the computer to execute the method performed by the communication device in the various embodiments of the present application.

[0272] The embodiment of the present application further provides a computer program. The computer program can be applied to the communication device provided by the embodiment of the present application, and the computer program causes the computer to execute the method performed by the communication device in the various embodiments of the present application.

[0273] It should be understood that the terms "system" and "network" can be used interchangeably in the present application. In addition, the terms used in the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application. The terms "first", "second", "third", and "fourth" and the like in the specification and claims of the present application and the drawings are used to distinguish different objects, and are not used to describe a particular order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0274] In the embodiments of the present application, a "field" can also be referred to as a "domain", a "subfield" or a "sub-domain". One field can occupy one or more bytes (octets), or one field can occupy one or more bits (bits).

[0275] The field name defined in the embodiments of the present application is only an example, and the field can have other names.

[0276] In the embodiments of the present application, the "indication" mentioned can be direct indication, indirect indication, or can be an indication with an associated relationship. For example, A indicates B, which can mean that B can be obtained by A, for example, B can be obtained by A; or it can mean that A indirectly indicates B, for example, A indicates C, and B can be obtained by C; or it can mean that A and B have an associated relationship.

[0277] In the embodiments of the present application, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean that B is determined only according to A, but B can also be determined according to A and / or other information.

[0278] In the embodiments of the present application, the term "corresponding" can mean that there is a direct or indirect corresponding relationship between the two, or it can mean that there is an associated relationship between the two, or it can mean an indication and being indicated, configuration and being configured, and the like.

[0279] In the embodiments of the present application, the "predefined" or "preconfigured" can be implemented by pre-storing corresponding codes, tables or other manners available for indicating relevant information in devices (for example, including AP and STA), and the specific implementation manners are not limited in the present application. For example, the predefined can refer to the definition in the protocol.

[0280] In the embodiments of the present application, the term "and / or" is only used to describe the association relationship of the associated objects, and can represent three relationships, for example, A and / or B can represent three cases of A alone, A and B together, and B alone. In addition, the character " / " in the present application generally represents an "or" relationship between the associated objects.

[0281] In the embodiments of the present application, the "including" can mean direct or indirect including. Alternatively, the "including" mentioned in the embodiments of the present application can be replaced by "indicating" or "used for determining". For example, A including B can be replaced by A indicating B or A used for determining B.

[0282] In various embodiments of the present application, the size of the serial number of the above processes does not mean the order of execution, and the execution order of the processes should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0283] In the embodiments of the present application, the "protocol" can refer to a standard protocol in the communication field, for example, can include WiFi protocol and related protocols applied to future WiFi communication systems, and the present application does not make any limitation.

[0284] In several embodiments provided by the present application, it should be understood that the disclosed system, device and method can be implemented by other manners. For example, the device embodiments described above are only schematic, for example, the division of the units is only a logical function division, and actual implementation can be in another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0285] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. According to actual needs, part or all of the units can be selected to achieve the purpose of the embodiments of the present application.

[0286] In addition, each function unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit.

[0287] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode. The computer readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server, data center, etc. integrated with one or more available media. The available media can be magnetic media (for example, floppy disk, hard disk, magnetic tape), optical media (for example, digital video disc (DVD)) or semiconductor media (for example, solid state disk (SSD)) and the like.

[0288] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method of wireless communication, the method comprising: Comprising: a first device transmits a first physical layer protocol data unit (PPDU); wherein a data field of the first PPDU is carried by a plurality of frequency domain parts, the plurality of frequency domain parts including repeated data mapped to the plurality of frequency domain parts by phase rotation.

2. The method of claim 1, wherein, The repeated data mapped to the plurality of frequency domain parts by phase rotation includes that the repeated data is multiplied by a phase rotation coefficient and then mapped to the plurality of frequency domain parts.

3. The method of claim 2, wherein, The frequency domain parts include a plurality of subcarrier groups, and the plurality of subcarrier groups correspond to the same or different phase rotation coefficients.

4. The method according to claim 2 or 3, characterized in that, The plurality of frequency domain parts are divided into a plurality of groups, the plurality of groups including a first group and a second group, the first group corresponding to a first phase rotation coefficient group, and the second group corresponding to a second phase rotation coefficient group, and the first phase rotation coefficient group and the second phase rotation coefficient group satisfy: The first phase rotation coefficient group and the second phase rotation coefficient group are not completely the same; or The first phase rotation coefficient group and the second phase rotation coefficient group are not mirror images.

5. The method according to any one of claims 2-4, characterized in that, The plurality of frequency domain parts are divided into a plurality of groups, the plurality of groups including a first group, and the first group corresponding to a plurality of phase rotation coefficients, and part or all of the plurality of phase rotation coefficients are different.

6. The method of any one of claims 2-5, wherein: The number of the plurality of frequency domain parts is 8, and the plurality of frequency domain parts correspond to phase rotation coefficients a0 to a7, respectively; or The number of the plurality of frequency domain parts is 4, the frequency domain parts include 2 subcarrier groups, and the plurality of frequency domain parts include 8 subcarrier groups corresponding to phase rotation coefficients a0 to a7, respectively; a0 to a7 satisfy: a0 = -1, a1 = 1, a2 = 1, a3 = 1, a4 = 1, a5 = -1, a6 = 1, a7 = 1; a0 = -1, a1 = 1, a2 = 1, a3 = 1, a4 = 1, a5 = 1, a6 = -1, a7 = 1; a0 = 1, a1 = -1, a2 = 1, a3 = 1, a4 = -1, a5 = 1, a6 = 1, a7 = 1; a0 = 1, a1 = -1, a2 = 1, a3 = 1, a4 = 1, a5 = 1, a6 = 1, a7 = -1; a0 = 1, a1 = 1, a2 = -1, a3 = 1, a4 = -1, a5 = 1, a6 = 1, a7 = 1; a0 = 1, a1 = 1, a2 = -1, a3 = 1, a4 = 1, a5 = 1, a6 = 1, a7 = -1; a0 = 1, a1 = 1, a2 = 1, a3 = -1, a4 = 1, a5 = -1, a6 = 1, a7 = 1; a0 = 1, a1 = 1, a2 = 1, a3 = -1, a4 = 1, a5 = 1, a6 = -1, a7 = 1; a0 = 1, a1 = -1, a2 = -1, a3 = -1, a4 = -1, a5 = 1, a6 = -1, a7 = -1; a0 = 1, a1 = -1, a2 = -1, a3 = -1, a4 = -1, a5 = -1, a6 = 1, a7 = -1; a0= -1, a1= 1, a2= -1, a3= -1, a4= 1, a5= -1, a6= -1, a7= -1; a0= -1, a1= 1, a2= -1, a3= -1, a4= -1, a5= -1, a6= -1, a7= 1; a0= -1, a1= -1, a2= 1, a3= -1, a4= 1, a5= -1, a6= -1, a7= -1; a0= -1, a1= -1, a2= 1, a3= -1, a4= -1, a5= -1, a6= -1, a7= 1; a0= -1, a1= -1, a2= -1, a3= 1, a4= -1, a5= 1, a6= -1, a7= -1; a0= -1, a1= -1, a2= -1, a3= 1, a4= -1, a5= -1, a6= 1, a7= -1; a0= -1, a1= 1, a2= 1, a3= 1, a4= -1, a5= 1, a6= -1, a7= -1; a0= -1, a1= 1, a2= 1, a3= 1, a4= -1, a5= -1, a6= 1, a7= -1; a0= 1, a1= -1, a2= 1, a3= 1, a4= 1, a5= -1, a6= -1, a7= -1; a0= 1, a1= -1, a2= 1, a3= 1, a4= -1, a5= -1, a6= -1, a7= 1; a0= 1, a1= 1, a2= -1, a3= 1, a4= 1, a5= -1, a6= -1, a7= -1; a0= 1, a1= 1, a2= -1, a3= 1, a4= -1, a5= -1, a6= -1, a7= 1; a0= 1, a1= 1, a2= 1, a3= -1, a4= -1, a5= 1, a6= -1, a7= -1; or a0= 1, a1= 1, a2= 1, a3= -1, a4= -1, a5= -1, a6= 1, a7= -1. The number of the plurality of frequency domain parts is 4, and phase rotation coefficients corresponding to the plurality of frequency domain parts are b0 to b3 respectively, b0 to b3 satisfy: b0= -1, b1= 1, b2= 1, b3= 1; b0= 1, b1= -1, b2= 1, b3= 1; b0= 1, b1= 1, b2= -1, b3= 1; b0= 1, b1= 1, b2= 1, b3= -1; b0= 1, b1= -1, b2= -1, b3= -1; b0= -1, b1= 1, b2= -1, b3= -1; b0= -1, b1= -1, b2= 1, b3= -1; or b0= -1, b1= -1, b2= -1, b3= 1. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 7. The method according to any one of claims 2-5, characterized in that, ​ 8. The method according to any one of claims 2-5, characterized in that, The number of the plurality of frequency domain parts is 2, the frequency domain parts include 2 subcarrier groups, and phase rotation coefficients corresponding to 4 subcarrier groups included in the plurality of frequency domain parts are c0 to c3 respectively, c0 to c3 satisfy: c0=-1, c1=1, c2=1, c3=1; c0=1, c1=-1, c2=1, c3=1; c0=1, c1=1, c2=-1, c3=1; c0=1, c1=1, c2=1, c3=-1; c0=1, c1=-1, c2=-1, c3=-1; c0=-1, c1=1, c2=-1, c3=-1; c0=-1, c1=-1, c2=1, c3=-1; or c0=-1, c1=-1, c2=-1, c3=1.

9. The method according to any one of claims 1-8, characterized in that, The bandwidth of the first PPDU is 20MHz, and the number of the plurality of frequency domain parts is 2, 4 or 8.

10. The method according to any one of claims 1-9, characterized in that, The bandwidth of the first PPDU is a first bandwidth, and the frequency domain resources occupied by the plurality of frequency domain parts are obtained by equally dividing the first bandwidth.

11. The method of claim 10, wherein, The first bandwidth is 20MHz, and the plurality of frequency domain parts satisfy one or more of the following: In the case where the number of the plurality of frequency domain parts is 2, the frequency domain resources occupied by the plurality of frequency domain parts are 10MHz respectively; In the case where the number of the plurality of frequency domain parts is 4, the frequency domain resources occupied by the plurality of frequency domain parts are 5MHz respectively; In the case where the number of the plurality of frequency domain parts is 8, the frequency domain resources occupied by the plurality of frequency domain parts are 2.5MHz respectively.

12. The method according to any one of claims 1-9, characterized in that, The frequency domain resources occupied by the plurality of frequency domain parts are represented by one or more resource units (RUs).

13. The method of claim 12, wherein, The bandwidth of the first PPDU is 20MHz, and the plurality of frequency domain parts satisfy one or more of the following: In the case where the number of the plurality of frequency domain parts is 2, the frequency domain resources occupied by the plurality of frequency domain parts are represented by 106-tone RUs or 52+26-tone MRUs respectively; In the case where the number of the plurality of frequency domain parts is 4, the frequency domain resources occupied by the plurality of frequency domain parts are represented by 52-tone RUs respectively; In the case where the number of the plurality of frequency domain parts is 8, the frequency domain resources occupied by the plurality of frequency domain parts are represented by 26-tone RUs respectively.

14. The method of any one of claims 1-13, wherein, The first PPDU includes a first field, and the first field is used to indicate information related to the plurality of frequency domain parts.

15. The method of claim 14, wherein, The first field is used to indicate one or more of the following: The number of the plurality of frequency domain parts; The frequency domain resources respectively occupied by the plurality of frequency domain parts.

16. The method according to claim 14 or 15, characterized in that, The first field belongs to a first preamble of the first PPDU.

17. The method of claim 16, wherein, The first preamble includes an enhanced long range (ELR) preamble.

18. The method of any of claims 1-17, wherein, In the case where the number of the plurality of frequency domain parts is 2, the data field is encoded and / or modulated according to a first modulation and coding scheme (MCS), and the first MCS includes: BPSK-DCM modulation, 1 / 2 code rate, and / or BPSK modulation, 1 / 2 code rate. In a case that the number of the plurality of frequency domain parts is 4, the data field is encoded and / or modulated according to a second MCS, the second MCS comprising BPSK modulation, 1 / 2 code rate; In a case that the number of the plurality of frequency domain parts is 8, the data field is encoded and / or modulated according to a third MCS, the third MCS comprising: QPSK modulation, 1 / 2 code rate, and / or, QPSK modulation, 3 / 4 code rate.

19. The method of any one of claims 1-18, wherein, The execution of the copying operation of the repeated data is based on an output after one or more of the following steps: encoding, modulation, constellation mapping, segment de-parsing.

20. The method of any one of claims 1-19, wherein, The first PPDU is an ELR PPDU.

21. The method of any one of claims 1-20, wherein, The first PPDU satisfies one or more of the following: The first PPDU allows transmission of only one spatial stream; The first PPDU allows transmission of one or more spatial streams; The first PPDU allows only single-user transmission; The first PPDU allows single-user or multi-user transmission.

22. A method of wireless communication, the method comprising: Comprise: The second device receives a first physical layer protocol data unit (PPDU); The data field of the first PPDU is carried by a plurality of frequency domain parts, and the plurality of frequency domain parts comprise repeated data, which is mapped to the plurality of frequency domain parts after phase rotation.

23. The method of claim 22, wherein, The repeated data is mapped to the plurality of frequency domain parts after being multiplied by a phase rotation coefficient.

24. The method of claim 23, wherein, The frequency domain part comprises a plurality of subcarrier groups, and the plurality of subcarrier groups correspond to the same or different phase rotation coefficients.

25. The method of claim 23 or 24, wherein, The plurality of frequency domain parts are divided into a plurality of groups, the plurality of groups comprising a first group and a second group, the first group corresponding to a first set of phase rotation coefficients, and the second group corresponding to a second set of phase rotation coefficients, the first set of phase rotation coefficients and the second set of phase rotation coefficients satisfying: The first set of phase rotation coefficients and the second set of phase rotation coefficients are not completely the same; or The first set of phase rotation coefficients and the second set of phase rotation coefficients are not mirror images.

26. The method of any one of claims 23-25, wherein, The plurality of frequency domain parts are divided into a plurality of groups, the plurality of groups comprising a first group, the first group corresponding to a plurality of phase rotation coefficients, and part or all of the plurality of phase rotation coefficients being different.

27. The method of any one of claims 23-26, wherein: The number of the plurality of frequency domain parts is 8, and the plurality of frequency domain parts correspond to phase rotation coefficients a0 to a7, respectively; or The number of the plurality of frequency domain parts is 4, the frequency domain part comprises 2 subcarrier groups, and the plurality of frequency domain parts comprise 8 subcarrier groups corresponding to phase rotation coefficients a0 to a7, respectively; a0 to a7 satisfy: a0 = -1, a1 = 1, a2 = 1, a3 = 1, a4 = 1, a5 = -1, a6 = 1, a7 = 1; a0 = -1, a1 = 1, a2 = 1, a3 = 1, a4 = 1, a5 = 1, a6 = -1, a7 = 1; a0 = 1, a1 = -1, a2 = 1, a3 = 1, a4 = -1, a5 = 1, a6 = 1, a7 = 1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1= 28. The method of any one of claims 23-26, wherein, The number of the plurality of frequency domain parts is 4, and phase rotation coefficients corresponding to the plurality of frequency domain parts are b0 to b3 respectively, and b0 to b3 satisfy: b0=-1, b1=1, b2=1, b3=1; b0=1, b1=-1, b2=1, b3=1; b0=1, b1=1, b2=-1, b3=1; b0=1, b1=1, b2=1, b3=-1; b0=1, b1=-1, b2=-1, b3=-1; b0=-1, b1=1, b2=-1, b3=-1; b0=-1, b1=-1, b2=1, b3=-1; or b0=-1, b1=-1, b2=-1, b3=1.

29. The method of any one of claims 23-26, wherein, The number of the plurality of frequency domain parts is 2, the frequency domain part includes 2 subcarrier groups, and phase rotation coefficients corresponding to 4 subcarrier groups contained in the plurality of frequency domain parts are c0 to c3 respectively, and c0 to c3 satisfy: c0=-1, c1=1, c2=1, c3=1; c0=1, c1=-1, c2=1, c3=1; c0=1, c1=1, c2=-1, c3=1; c0=1, c1=1, c2=1, c3=-1; c0=1, c1=-1, c2=-1, c3=-1; c0=-1, c1=1, c2=-1, c3=-1; c0=-1, c1=-1, c2=1, c3=-1; or c0=-1, c1=-1, c2=-1, c3=1.

30. The method of any one of claims 22-29, wherein, The bandwidth of the first PPDU is 20MHz, and the number of the plurality of frequency domain parts is 2, 4 or 8.

31. The method of any one of claims 22-30, wherein, The bandwidth of the first PPDU is a first bandwidth, and the frequency domain resources occupied by the plurality of frequency domain parts are obtained by equally dividing the first bandwidth.

32. The method of claim 31, wherein, The first bandwidth is 20MHz, and the plurality of frequency domain parts satisfy one or more of the following: In the case where the number of the plurality of frequency domain parts is 2, the frequency domain resources occupied by the plurality of frequency domain parts are 10MHz respectively; In the case where the number of the plurality of frequency domain parts is 4, the frequency domain resources occupied by the plurality of frequency domain parts are 5MHz respectively; In the case where the number of the plurality of frequency domain parts is 8, the frequency domain resources occupied by the plurality of frequency domain parts are 2.5MHz respectively.

33. The method of any one of claims 22-30, wherein, The frequency domain resources occupied by the plurality of frequency domain parts are represented by one or more resource units (RUs).

34. The method of claim 33, wherein, The bandwidth of the first PPDU is 20MHz, and the plurality of frequency domain parts satisfy one or more of the following: In the case where the number of the plurality of frequency domain parts is 2, the frequency domain resources occupied by the plurality of frequency domain parts are represented by 106-tone RUs or 52+26-tone MRUs respectively; In the case where the number of the plurality of frequency domain parts is 4, the frequency domain resources occupied by the plurality of frequency domain parts are represented by 52-tone RUs respectively; In the case where the number of the plurality of frequency domain parts is 8, the frequency domain resources occupied by the plurality of frequency domain parts are represented by 26-tone RUs respectively.

35. The method of any one of claims 22-34, wherein, The first PPDU includes a first field, and the first field is used to indicate information related to the plurality of frequency domain parts.

36. The method of claim 35, wherein, The first field is used to indicate one or more of the following: The number of the plurality of frequency domain parts; The frequency domain resources occupied by each of the plurality of frequency domain parts.

37. The method of claim 35 or 36, wherein, The first field belongs to a first preamble of the first PPDU.

38. The method of claim 37, wherein, The first preamble comprises an enhanced long range (ELR) preamble.

39. The method of any of claims 22-38, wherein, In a case where the number of the plurality of frequency domain parts is 2, the data field is encoded and / or modulated according to a first modulation and coding scheme (MCS), the first MCS comprising: BPSK-DCM modulation, 1 / 2 code rate, and / or, BPSK modulation, 1 / 2 code rate; In a case where the number of the plurality of frequency domain parts is 4, the data field is encoded and / or modulated according to a second MCS, the second MCS comprising BPSK modulation, 1 / 2 code rate; In a case where the number of the plurality of frequency domain parts is 8, the data field is encoded and / or modulated according to a third MCS, the third MCS comprising: QPSK modulation, 1 / 2 code rate, and / or, QPSK modulation, 3 / 4 code rate.

40. The method of any one of claims 22-39, wherein, The execution of the copying operation of the repeated data is based on an output after one or more of the following steps: encoding, modulation, constellation mapping, segment de-parsing.

41. The method of any one of claims 22-40, wherein, The first PPDU is an enhanced long range (ELR) PPDU.

42. The method of any one of claims 22-41, wherein, The first PPDU satisfies one or more of the following: The first PPDU only allows transmission of one spatial stream; The first PPDU allows transmission of one or more spatial streams; The first PPDU only allows single-user transmission; The first PPDU allows single-user or multi-user transmission.

43. A communications device, characterized by The communication device is a first device, and the communication device comprises: a sending unit configured to send a first physical layer protocol data unit (PPDU); wherein a data field of the first PPDU is carried through a plurality of frequency domain parts, and the plurality of frequency domain parts comprises repeated data, and the repeated data is mapped to the plurality of frequency domain parts through phase rotation.

44. The communication device of claim 43, wherein, The mapping of the repeated data to the plurality of frequency domain parts through phase rotation comprises: the repeated data is multiplied by a phase rotation coefficient and then mapped to the plurality of frequency domain parts.

45. The communication device of claim 44, wherein, The frequency domain part comprises a plurality of subcarrier groups, and the plurality of subcarrier groups correspond to the same or different phase rotation coefficients.

46. The communication device of claim 44 or 45, wherein, The plurality of frequency domain parts are divided into a plurality of groups, the plurality of groups comprise a first group and a second group, the first group corresponds to a first set of phase rotation coefficients, and the second group corresponds to a second set of phase rotation coefficients, and the first set of phase rotation coefficients and the second set of phase rotation coefficients satisfy: The first set of phase rotation coefficients and the second set of phase rotation coefficients are not completely the same; or The first set of phase rotation coefficients and the second set of phase rotation coefficients are not mirror images.

47. The communication device of any of claims 44-46, wherein, The plurality of frequency domain parts are divided into a plurality of groups, the plurality of groups comprise a first group, the first group corresponds to a plurality of phase rotation coefficients, and part or all of the plurality of phase rotation coefficients are different.

48. The communication device of any of claims 44-47, wherein, The number of the plurality of frequency domain parts is 8, and the phase rotation coefficients corresponding to the plurality of frequency domain parts are a0 to a7 respectively; or The number of the plurality of frequency domain parts is 4, the frequency domain part includes 2 subcarrier groups, and the phase rotation coefficients corresponding to the 8 subcarrier groups contained in the plurality of frequency domain parts are a0 to a7 respectively; a0 to a7 satisfy: a0 = -1, a1 = 1, a2 = 1, a3 = 1, a4 = 1, a5 = -1, a6 = 1, a7 = 1; a0 = -1, a1 = 1, a2 = 1, a3 = 1, a4 = 1, a5 = 1, a6 = -1, a7 = 1; a0 = 1, a1 = -1, a2 = 1, a3 = 1, a4 = -1, a5 = 1, a6 = 1, a7 = 1; a0 = 1, a1 = -1, a2 = 1, a3 = 1, a4 = 1, a5 = 1, a6 = 1, a7 = -1; a0 = 1, a1 = 1, a2 = -1, a3 = 1, a4 = -1, a5 = 1, a6 = 1, a7 = 1; a0 = 1, a1 = 1, a2 = -1, a3 = 1, a4 = 1, a5 = 1, a6 = 1, a7 = -1; a0 = 1, a1 = 1, a2 = 1, a3 = -1, a4 = 1, a5 = -1, a6 = 1, a7 = 1; a0 = 1, a1 = 1, a2 = 1, a3 = -1, a4 = 1, a5 = 1, a6 = -1, a7 = 1; a0 = 1, a1 = -1, a2 = -1, a3 = -1, a4 = -1, a5 = 1, a6 = -1, a7 = -1; a0 = 1, a1 = -1, a2 = -1, a3 = -1, a4 = -1, a5 = -1, a6 = 1, a7 = -1; a0 = -1, a1 = 1, a2 = -1, a3 = -1, a4 = 1, a5 = -1, a6 = -1, a7 = -1; a0 = -1, a1 = 1, a2 = -1, a3 = -1, a4 = -1, a5 = -1, a6 = -1, a7 = 1; a0 = -1, a1 = -1, a2 = 1, a3 = -1, a4 = 1, a5 = -1, a6 = -1, a7 = -1; a0 = -1, a1 = -1, a2 = 1, a3 = -1, a4 = -1, a5 = -1, a6 = -1, a7 = 1; a0 = -1, a1 = -1, a2 = -1, a3 = 1, a4 = -1, a5 = 1, a6 = -1, a7 = -1; a0 = -1, a1 = -1, a2 = -1, a3 = 1, a4 = -1, a5 = -1, a6 = 1, a7 = -1; a0 = -1, a1 = 1, a2 = 1, a3 = 1, a4 = -1, a5 = 1, a6 = -1, a7 = -1; a0 = -1, a1 = 1, a2 = 1, a3 = 1, a4 = -1, a5 = -1, a6 = 1, a7 = -1; a0 = 1, a1 = -1, a2 = 1, a3 = 1, a4 = 1, a5 = -1, a6 = -1, a7 = -1; a0 = 1, a1 = -1, a2 = 1, a3 = 1, a4 = -1, a5 = -1, a6 = -1, a7 = 1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1; a0=1, a1=1, a2=1, a3=1, a4=1, a5=1, a6=1, a7=1.

49. The communication device of any of claims 44-47, wherein, The number of the plurality of frequency domain parts is 4, and phase rotation coefficients corresponding to the plurality of frequency domain parts are b0 to b3 respectively, b0 to b3 satisfy: b0=-1, b1=1, b2=1, b3=1; b0=1, b1=-1, b2=1, b3=1; b0=1, b1=1, b2=-1, b3=1; b0=1, b1=1, b2=1, b3=-1; b0=1, b1=-1, b2=-1, b3=-1; b0=-1, b1=1, b2=-1, b3=-1; b0=-1, b1=-1, b2=1, b3=-1; or b0=-1, b1=-1, b2=-1, b3=1.

50. The communication device of any one of claims 44-47, wherein, The number of the plurality of frequency domain parts is 2, the frequency domain part includes 2 subcarrier groups, and phase rotation coefficients corresponding to 4 subcarrier groups contained in the plurality of frequency domain parts are c0 to c3 respectively, c0 to c3 satisfy: c0=-1, c1=1, c2=1, c3=1; c0=1, c1=-1, c2=1, c3=1; c0=1, c1=1, c2=-1, c3=1; c0=1, c1=1, c2=1, c3=-1; c0=1, c1=-1, c2=-1, c3=-1; c0=-1, c1=1, c2=-1, c3=-1; c0=-1, c1=-1, c2=1, c3=-1; or c0=-1, c1=-1, c2=-1, c3=1.

51. The communication device of any of claims 43-50, wherein, The bandwidth of the first PPDU is 20MHz, and the number of the plurality of frequency domain parts is 2, 4 or 8.

52. The communication device of any of claims 43-51, wherein, The bandwidth of the first PPDU is a first bandwidth, and the frequency domain resources occupied by the plurality of frequency domain parts are obtained by equally dividing the first bandwidth.

53. The communication device of claim 52, wherein, The first bandwidth is 20MHz, and the plurality of frequency domain parts satisfy one or more of the following: In the case where the number of the plurality of frequency domain parts is 2, the frequency domain resources occupied by the plurality of frequency domain parts are 10MHz respectively; In the case where the number of the plurality of frequency domain parts is 4, the frequency domain resources occupied by the plurality of frequency domain parts are 5MHz respectively; In the case where the number of the plurality of frequency domain parts is 8, the frequency domain resources occupied by the plurality of frequency domain parts are 2.5MHz respectively.

54. The communication device of any of claims 43-51, wherein, The frequency domain resources occupied by the plurality of frequency domain parts are represented by one or more resource units (RUs).

55. The communication device of claim 54, wherein, The bandwidth of the first PPDU is 20MHz, and the plurality of frequency domain parts satisfy one or more of the following: In a case where the number of the plurality of frequency domain parts is 2, the frequency domain resources occupied by the plurality of frequency domain parts are represented by 106-tone RUs or 52+26-tone MRUs; In a case where the number of the plurality of frequency domain parts is 4, the frequency domain resources occupied by the plurality of frequency domain parts are represented by 52-tone RUs; In a case where the number of the plurality of frequency domain parts is 8, the frequency domain resources occupied by the plurality of frequency domain parts are represented by 26-tone RUs.

56. The communication device of any of claims 43-55, wherein, The first PPDU comprises a first field, and the first field is used to indicate information related to the plurality of frequency domain parts.

57. The communication device of claim 56, wherein, The first field is used to indicate one or more of the following: The number of the plurality of frequency domain parts; The frequency domain resources occupied by each of the plurality of frequency domain parts.

58. The communication device of claim 55 or 56, wherein, The first field belongs to a first preamble of the first PPDU.

59. The communication device of claim 58, wherein, The first preamble comprises an enhanced long range (ELR) preamble.

60. The communication device of any one of claims 43-59, wherein, In a case where the number of the plurality of frequency domain parts is 2, the data field is encoded and / or modulated according to a first modulation and coding scheme (MCS), and the first MCS comprises: BPSK-DCM modulation, 1 / 2 code rate, and / or BPSK modulation, 1 / 2 code rate; In a case where the number of the plurality of frequency domain parts is 4, the data field is encoded and / or modulated according to a second MCS, and the second MCS comprises BPSK modulation, 1 / 2 code rate; In a case where the number of the plurality of frequency domain parts is 8, the data field is encoded and / or modulated according to a third MCS, and the third MCS comprises: QPSK modulation, 1 / 2 code rate, and / or QPSK modulation, 3 / 4 code rate.

61. The communication device of any of claims 43-60, wherein, The execution of the copying operation of the repeated data is based on an output after one or more of the following steps: encoding, modulation, constellation mapping, segment de-parsing.

62. The communication device of any of claims 43-61, wherein, The first PPDU is an ELR PPDU.

63. The communication device of any of claims 43-62, wherein, The first PPDU satisfies one or more of the following: The first PPDU allows only one spatial stream to be transmitted; The first PPDU allows one or more spatial streams to be transmitted; The first PPDU allows only single-user transmission; The first PPDU allows single-user or multi-user transmission.

64. A communications device, characterized by The communication device is a second device, and the communication device comprises: a receiving unit configured to receive a first physical layer protocol data unit (PPDU); The data field of the first PPDU is carried by a plurality of frequency domain parts, and the plurality of frequency domain parts comprise repeated data, and the repeated data is mapped to the plurality of frequency domain parts after phase rotation.

65. The communication device of claim 64, wherein, The repeated data is mapped to the plurality of frequency domain parts after being multiplied by a phase rotation coefficient.

66. The communication device of claim 65, wherein, The frequency domain parts comprise a plurality of subcarrier groups, and the plurality of subcarrier groups correspond to the same or different phase rotation coefficients.

67. The communication device of claim 65 or 66, wherein, The multiple frequency domain parts are divided into multiple groups, the multiple groups include a first group and a second group, the first group corresponds to a first phase rotation coefficient group, and the second group corresponds to a second phase rotation coefficient group, the first phase rotation coefficient group and the second phase rotation coefficient group satisfy: The first phase rotation coefficient group and the second phase rotation coefficient group are not completely same; or The first phase rotation coefficient group and the second phase rotation coefficient group are not mirror images.

68. The communication device of any of claims 65-67, wherein, The multiple frequency domain parts are divided into multiple groups, the multiple groups include a first group, and the first group corresponds to multiple phase rotation coefficients, and part or all of the multiple phase rotation coefficients are different.

69. The communication device of any one of claims 65-68, wherein: The number of the multiple frequency domain parts is 8, and the multiple frequency domain parts correspond to phase rotation coefficients a0 to a7, respectively; or The number of the multiple frequency domain parts is 4, the multiple frequency domain parts include 2 subcarrier groups, and the multiple frequency domain parts include 8 subcarrier groups, and the 8 subcarrier groups correspond to phase rotation coefficients a0 to a7, respectively; a0 to a7 satisfy: a0 = -1, a1 = 1, a2 = 1, a3 = 1, a4 = 1, a5 = -1, a6 = 1, a7 = 1; a0 = -1, a1 = 1, a2 = 1, a3 = 1, a4 = 1, a5 = 1, a6 = -1, a7 = 1; a0 = 1, a1 = -1, a2 = 1, a3 = 1, a4 = -1, a5 = 1, a6 = 1, a7 = 1; a0 = 1, a1 = -1, a2 = 1, a3 = 1, a4 = 1, a5 = 1, a6 = 1, a7 = -1; a0 = 1, a1 = 1, a2 = -1, a3 = 1, a4 = -1, a5 = 1, a6 = 1, a7 = 1; a0 = 1, a1 = 1, a2 = -1, a3 = 1, a4 = 1, a5 = 1, a6 = 1, a7 = -1; a0 = 1, a1 = 1, a2 = 1, a3 = -1, a4 = 1, a5 = -1, a6 = 1, a7 = 1; a0 = 1, a1 = 1, a2 = 1, a3 = -1, a4 = 1, a5 = 1, a6 = -1, a7 = 1; a0 = 1, a1 = -1, a2 = -1, a3 = -1, a4 = -1, a5 = 1, a6 = -1, a7 = -1; a0 = 1, a1 = -1, a2 = -1, a3 = -1, a4 = -1, a5 = -1, a6 = 1, a7 = -1; a0 = -1, a1 = 1, a2 = -1, a3 = -1, a4 = 1, a5 = -1, a6 = -1, a7 = -1; a0 = -1, a1 = 1, a2 = -1, a3 = -1, a4 = -1, a5 = -1, a6 = -1, a7 = 1; a0 = -1, a1 = -1, a2 = 1, a3 = -1, a4 = 1, a5 = -1, a6 = -1, a7 = -1; a0 = -1, a1 = -1, a2 = 1, a3 = -1, a4 = -1, a5 = -1, a6 = -1, a7 = 1; a0= -1, a1= -1, a2= -1, a3= 1, a4= -1, a5= 1, a6= -1, a7= -1; a0= -1, a1= -1, a2= -1, a3= 1, a4= -1, a5= -1, a6= 1, a7= -1; a0= -1, a1= 1, a2= 1, a3= 1, a4= -1, a5= 1, a6= -1, a7= -1; a0= -1, a1= 1, a2= 1, a3= 1, a4= -1, a5= -1, a6= 1, a7= -1; a0= 1, a1= -1, a2= 1, a3= 1, a4= 1, a5= -1, a6= -1, a7= -1; a0= 1, a1= -1, a2= 1, a3= 1, a4= -1, a5= -1, a6= -1, a7= 1; a0= 1, a1= 1, a2= -1, a3= 1, a4= 1, a5= -1, a6= -1, a7= -1; a0= 1, a1= 1, a2= -1, a3= 1, a4= -1, a5= -1, a6= -1, a7= 1; a0= 1, a1= 1, a2= 1, a3= -1, a4= -1, a5= 1, a6= -1, a7= -1; or a0= 1, a1= 1, a2= 1, a3= -1, a4= -1, a5= -1, a6= 1, a7= -1. The number of the plurality of frequency domain parts is 4, and phase rotation coefficients corresponding to the plurality of frequency domain parts are b0 to b3 respectively, and b0 to b3 satisfy: b0= -1, b1= 1, b2= 1, b3= 1; b0= 1, b1= -1, b2= 1, b3= 1; b0= 1, b1= 1, b2= -1, b3= 1; b0= 1, b1= 1, b2= 1, b3= -1; b0= 1, b1= -1, b2= -1, b3= -1; b0= -1, b1= 1, b2= -1, b3= -1; b0= -1, b1= -1, b2= 1, b3= -1; or b0= -1, b1= -1, b2= -1, b3= 1. The number of the plurality of frequency domain parts is 2, the frequency domain part includes 2 subcarrier groups, and phase rotation coefficients corresponding to 4 subcarrier groups contained in the plurality of frequency domain parts are c0 to c3 respectively, and c0 to c3 satisfy: c0= -1, c1= 1, c2= 1, c3= 1; c0= 1, c1= -1, c2= 1, c3= 1; c0= 1, c1= 1, c2= -1, c3= 1; c0= 1, c1= 1, c2= 1, c3= -1; c0= 1, c1= -1, c2= -1, c3= -1; c0= -1, c1= 1, c2= -1, c3= -1; c0= -1, c1= -1, c2= 1, c3= -1; or c0= -1, c1= -1, c2= -1, c3= 1. The bandwidth of the first PPDU is 20MHz, and the number of the plurality of frequency domain parts is 2, 4 or 8. ​ ​ ​ ​ ​ ​ 70. The communication device of any of claims 65-68, wherein, ​ 71. The communication device of any of claims 65-68, wherein, ​ 72. The communication device of any of claims 64-71, wherein, ​ 73. The communication device of any of claims 64-72, wherein, The first PPDU has a first bandwidth, and the multiple frequency domain parts occupy frequency domain resources obtained by equally dividing the first bandwidth.

74. The communication device of claim 73, wherein, The first bandwidth is 20 MHz, and the multiple frequency domain parts satisfy one or more of the following: In a case where the number of the multiple frequency domain parts is 2, the multiple frequency domain parts occupy frequency domain resources of 10 MHz respectively; In a case where the number of the multiple frequency domain parts is 4, the multiple frequency domain parts occupy frequency domain resources of 5 MHz respectively; In a case where the number of the multiple frequency domain parts is 8, the multiple frequency domain parts occupy frequency domain resources of 2.5 MHz respectively.

75. The communication device of any of claims 64-72, wherein, The frequency domain resources occupied by the multiple frequency domain parts are represented by one or more resource units (RUs).

76. The communication device of claim 75, wherein, The first PPDU has a first bandwidth of 20 MHz, and the multiple frequency domain parts satisfy one or more of the following: In a case where the number of the multiple frequency domain parts is 2, the multiple frequency domain parts occupy frequency domain resources represented by 106-tone RUs or 52+26-tone MRUs respectively; In a case where the number of the multiple frequency domain parts is 4, the multiple frequency domain parts occupy frequency domain resources represented by 52-tone RUs respectively; In a case where the number of the multiple frequency domain parts is 8, the multiple frequency domain parts occupy frequency domain resources represented by 26-tone RUs respectively.

77. The communication device of any of claims 64-76, wherein, The first PPDU comprises a first field for indicating information related to the multiple frequency domain parts.

78. The communication device of claim 77, wherein, The first field is used to indicate one or more of the following: The number of the multiple frequency domain parts; The frequency domain resources occupied by the multiple frequency domain parts respectively.

79. The communication device of claim 77 or 78, wherein, The first field belongs to a first preamble of the first PPDU.

80. The communication device of claim 79, wherein, The first preamble comprises an enhanced long range (ELR) preamble.

81. The communication device of any of claims 64-80, wherein, In a case where the number of the multiple frequency domain parts is 2, the data field is encoded and / or modulated according to a first modulation and coding scheme (MCS), and the first MCS comprises BPSK-DCM modulation, 1 / 2 code rate, and / or BPSK modulation, 1 / 2 code rate; In a case where the number of the multiple frequency domain parts is 4, the data field is encoded and / or modulated according to a second MCS, and the second MCS comprises BPSK modulation, 1 / 2 code rate; In a case where the number of the multiple frequency domain parts is 8, the data field is encoded and / or modulated according to a third MCS, and the third MCS comprises QPSK modulation, 1 / 2 code rate, and / or QPSK modulation, 3 / 4 code rate.

82. The communication device of any of claims 64-81, wherein, The execution of the copying operation of the repeated data is based on an output after one or more of the following steps: encoding, modulation, constellation mapping, and segment de-parsing.

83. The communication device of any of claims 64-82, wherein, The first PPDU is an enhanced long range (ELR) PPDU.

84. The communication device of any of claims 64-83, wherein, The first PPDU satisfies one or more of the following: The first PPDU allows transmission of only one spatial stream; The first PPDU allows transmission of one or more spatial streams; The first PPDU allows only single-user transmission; The first PPDU allows single-user or multi-user transmission.

85. A communications device, characterized by A communication device comprising a transceiver, a memory for storing a program, and a processor for invoking the program in the memory and controlling the transceiver to receive or transmit signals, so as to make the communication device perform the method according to any one of claims 1-42.

86. An apparatus comprising: A device comprising a processor for invoking a program from a memory, so as to make the device perform the method according to any one of claims 1-42.

87. A chip, comprising: A chip comprising a processor for invoking a program from a memory, so that the device installed with the chip performs the method according to any one of claims 1-42.

88. A computer-readable storage medium, characterized in that, A computer program product, wherein a program is stored on the computer program product, and the program causes a computer to perform the method according to any one of claims 1-42.

89. A computer program product, characterized in that, A computer program product, wherein a program is stored on the computer program product, and the program causes a computer to perform the method according to any one of claims 1-42.

90. A computer program, characterized in that, The computer program product causes a computer to perform the method according to any one of claims 1-42.

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