WO2022206590A1

WO2022206590A1 - Data processing method and communication device

Info

Publication number: WO2022206590A1
Application number: PCT/CN2022/082981
Authority: WO
Inventors: 林伟; 戴胜辰; 刘鹏; 杨讯; 颜敏
Original assignee: 华为技术有限公司
Priority date: 2021-04-02
Filing date: 2022-03-25
Publication date: 2022-10-06
Also published as: CN115174328A; CN115174328B; CN117749585A

Abstract

Provided in the embodiments of the present application is a data processing method. The data processing method is implemented by means of the interaction between a first communication device and a second communication device. The first communication device respectively divides a data sequence and a guard interval sequence in a DFT-S-OFDM symbol into a plurality of data sub-sequences and a plurality of guard interval sub-sequences. The first communication device enables each guard interval sub-sequence to be located at the tail end of each data sub-sequence, and an (n+1)th data sub-sequence and an nth guard interval sub-sequence are adjacent to each other end to end. The second communication device can effectively utilize the guard interval sub-sequences before and after the data sub-sequences to perform more accurate phase estimation and phase compensation.

Description

A data processing method and communication device

This application claims the priority of the Chinese patent application with the application number 202110363723.8 and the application title "A data processing method and communication device" filed with the State Intellectual Property Office of China on April 2, 2021, the entire contents of which are incorporated by reference in in this application.

technical field

The present application relates to the field of communication technologies, and in particular, to a data processing method and a communication device.

Background technique

Orthogonal frequency division multiplexing (OFDM) technology has been widely adopted in existing wireless local area network (WLAN) standards to improve the spectrum utilization and transmission reliability of the system. The peak rate of the next-generation high-frequency WLAN is as high as 176Gbps, which can be applied to scenarios such as high-definition transmission, wireless screen projection, and wireless backhaul. In order to reduce the peak-to-average ratio of the system while supporting multi-user frequency division multiplexing, it can be considered to introduce discrete Fourier transform spread orthogonal frequency division multiplexing (discrete Fourier transform spread OFDM, DFT-S) into the next-generation high-frequency WLAN -OFDM) transmission technology. However, in the current high-frequency communication system DFT-S-OFDM transmission mode, the symbols in the data frame cannot accurately perform phase estimation and phase compensation.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a data processing method and a communication device, and the method is conducive to more accurate phase estimation and phase compensation for symbols in a data frame.

In a first aspect, an embodiment of the present application provides a data processing method, and the method is executed by a first communication device. The first communication device is the transmitting end of the DFT-S-OFDM symbol. The first communication device divides the data sequence and the guard interval sequence in the DFT-S-OFDM symbol into a plurality of sub-data sequences and a plurality of sub-guard interval sequences, respectively. The first communication device makes each sub-guard interval sequence located at the end of the sub-data sequence, and the n+1 th sub-data sequence is adjacent to the n-th sub-guard interval sequence. It can be seen that the sub-data sequence can effectively utilize the sub-guard interval sequences before and after the sub-data sequence to perform more accurate phase estimation and phase compensation.

In a possible design, the guard interval sequence in one symbol includes a first sub-guard interval sequence and a second sub-guard interval sequence. The lengths of the first sub-guard interval sequence and the second sub-guard interval sequence are the same. The data sequence in one symbol includes a first sub-data sequence and a second sub-data sequence. It can be seen that the first communication device equally divides the guard interval sequence in the symbol into two parts, which can effectively reduce the interval of the guard interval sequence without increasing the overhead of the guard interval sequence, thereby helping to improve the accuracy of phase estimation and phase compensation.

In one possible design, the first sub-data sequence precedes the second sub-data sequence. The first sub-guard interval sequence is located at the end of the first sub-data sequence, and the second sub-guard interval sequence is located at the end of the second sub-data sequence. It can be seen that each sub-guard interval sequence is located at the end of the sub-data sequence, so that the sub-data sequence can effectively utilize the preceding and following sub-guard interval sequences for more accurate phase estimation and phase compensation.

In a possible design, the guard interval sequence in one symbol includes a first sub-guard interval sequence, a second sub-guard interval sequence and a third sub-guard interval sequence. The lengths of the first sub-guard interval sequence and the third sub-guard interval sequence are the same. The length of the second sub-guard interval sequence is the sum of the lengths of the first sub-guard interval sequence and the third sub-guard interval sequence. The data sequence in one symbol includes a first sub-data sequence and a second sub-data sequence. It can be seen that, in order to take into account the first sub-data sequence and the last sub-data sequence in the symbol, the first communication device equally divides the last sub-guard interval sequence into two sub-guard interval sequences.

In one possible design, the first sub-data sequence precedes the second sub-data sequence. The first sub-guard interval sequence is located at the head of the first sub-data sequence, and the second sub-guard interval sequence is located at the tail of the first sub-data sequence. The third sub-guard interval sequence is located at the end of the second sub-data sequence. It can be seen that the two sub-guard interval sequences are located at the head of the first sub-data sequence and the tail of the last sub-data sequence respectively. The symbols are arranged in this order, which facilitates more accurate phase estimation and phase compensation for the first sub-data sequence and the last sub-data sequence using the preceding and following sub-guard interval sequences.

In a possible design, when the first communication device has two data streams, the first communication device determines that the first guard interval sequence of symbols in the first data stream includes a first sub-guard interval sequence and a second sub-guard interval sequence. The lengths of the first sub-guard interval sequence and the second sub-guard interval sequence are the same. The first communication device determines that the second guard interval sequence of symbols in the second data stream includes a third sub-guard interval sequence and a fourth sub-guard interval sequence. The lengths of the third sub-guard interval sequence and the fourth sub-guard interval sequence are the same. Wherein, the first sub-guard interval sequence and the third sub-guard interval sequence are different guard interval sequences, and/or the second sub-guard interval sequence and the fourth sub-guard interval sequence are different guard interval sequences. The first communication device determines that the first data sequence of symbols in the first data stream includes a first sub-data sequence and a second sub-data sequence. The first communication device determines that the second data sequence of symbols in the second data stream includes a third sub-sequence of data and a fourth sub-sequence of data. It can be seen that in the case of multiple data streams, the first communication device divides the guard interval sequences of symbols in the multiple data streams into multiple sub-guard interval sequences respectively. This method can effectively reduce the spacing of the guard interval sequence for each data stream.

In a possible design, the multiple guard interval symbols in the sub-guard interval sequence in the first data stream are arranged in a first order. The plurality of guard interval symbols of the neutron guard interval sequence in the second data stream are arranged in a second order. The second sequence is the sequence in which the first sequence is cyclically shifted according to one or more guard interval symbols. It can be seen that in the case of multiple data streams, the first communication device can avoid harmful beamforming effects based on the sequence of different guard interval symbols of the same guard interval sequence.

In one possible design, the first sub-data sequence of symbols in the first data stream precedes the second sub-data sequence. The first sub-guard interval sequence is located. The tail of the first sub data sequence. The second sub-guard interval sequence is located at the end of the second sub-data sequence. The third sub-data sequence of symbols in the second data stream precedes the fourth sub-data sequence. The third sub-guard interval sequence is located at the end of the third sub-data sequence. The fourth sub-guard interval sequence is located at the end of the fourth sub-data sequence. It can be seen that in the case of multiple data streams, for each data stream, each sub-guard interval sequence is located at the end of the sub-data sequence, so that the sub-data sequence can effectively use the sub-guard interval sequences before and after for more accurate phase estimation and phase estimation. compensate.

In a second aspect, an embodiment of the present application provides a data processing method, and the method is executed by a second communication device. The second communication device is the receiving end of the DFT-S-OFDM symbol. The second communication device receives the data frame from the first communication device. The data sequence and guard interval sequence in one DFT-S-OFDM symbol of the data frame are respectively divided into multiple sub-data sequences and multiple sub-guard interval sequences. Each sub-guard interval sequence is located at the end of the sub-data sequence, and the n+1-th sub-data sequence is adjacent to the n-th sub-guard interval sequence. The second communication device performs phase estimation and phase compensation on the sub-data sequence according to the arrangement order of the sub-data sequence and the sub-guard interval sequence. It can be seen that the second communication device can effectively use the sub-guard interval sequences at the beginning and the end of the sub-data sequence to perform more accurate phase estimation and phase compensation on the sub-data sequence.

In a possible design, the second communication device acquires multiple phases corresponding to multiple sub-guard interval sequences respectively. For each sub-data sequence, the second communication device performs phase estimation and phase compensation on the sub-data sequence according to the phases corresponding to the sub-guard interval sequences at the beginning and the end of the sub-data sequence.

In a third aspect, an embodiment of the present application provides a communication device, where the communication device includes a processing unit and a transceiver unit. The processing unit is used to determine the discrete Fourier transform extended orthogonal frequency division multiplexing DFT-S-OFDM symbols carried by the data frame. The arrangement order of the guard interval sequence and the data sequence in a symbol is that the multiple sub-guard interval sequences are respectively located at the end of the multiple sub-data sequences, and the n+1 th sub-data sequence is adjacent to the n th sub-guard interval sequence. n satisfies 0≤n≤N, where N is a positive integer. The processing unit is also used for transforming the data frame. The transceiver unit is used for sending the transformed data frame to the second communication device.

In a possible design, the guard interval sequence in one symbol includes a first sub-guard interval sequence and a second sub-guard interval sequence. The lengths of the first sub-guard interval sequence and the second sub-guard interval sequence are the same. The data sequence in one symbol includes a first sub-data sequence and a second sub-data sequence.

In one possible design, the first sub-data sequence precedes the second sub-data sequence. The first sub-guard interval sequence is located at the end of the first sub-data sequence. The second sub-guard interval sequence is located at the end of the second sub-data sequence.

In a possible design, the guard interval sequence in one symbol includes a first sub-guard interval sequence, a second sub-guard interval sequence and a third sub-guard interval sequence. The lengths of the first sub-guard interval sequence and the third sub-guard interval sequence are the same. The length of the second sub-guard interval sequence is the sum of the lengths of the first sub-guard interval sequence and the third sub-guard interval sequence. The data sequence in one symbol includes a first sub-data sequence and a second sub-data sequence.

In one possible design, the first sub-data sequence precedes the second sub-data sequence. The first sub-guard interval sequence is located at the head of the first sub-data sequence, and the second sub-guard interval sequence is located at the tail of the first sub-data sequence. The third sub-guard interval sequence is located at the end of the second sub-data sequence.

In a possible design, the processing unit is used to determine the discrete Fourier transform extended orthogonal frequency division multiplexing DFT-S-OFDM symbols carried by the data frame, including:

The first guard interval sequence for determining the symbols in the first data stream includes a first sub-guard interval sequence and a second sub-guard interval sequence. The lengths of the first sub-guard interval sequence and the second sub-guard interval sequence are the same.

The second guard interval sequence determining the symbols in the second data stream includes a third sub-guard interval sequence and a fourth sub-guard interval sequence. The lengths of the third sub-guard interval sequence and the fourth sub-guard interval sequence are the same. The first sub-guard interval sequence and the third sub-guard interval sequence are different guard interval sequences, and/or the second sub-guard interval sequence and the fourth sub-guard interval sequence are different guard interval sequences.

A first data sequence that determines symbols in the first data stream includes a first sub-sequence of data and a second sub-sequence of data.

The second data sequence that determines symbols in the second data stream includes a third sub-sequence and a fourth sub-sequence of data.

In a possible design, the multiple guard interval symbols in the sub-guard interval sequence in the first data stream are arranged in a first order. The plurality of guard interval symbols of the neutron guard interval sequence in the second data stream are arranged in a second order. The second sequence is the sequence in which the first sequence is cyclically shifted according to one or more guard interval symbols.

In one possible design, the first sub-data sequence of symbols in the first data stream precedes the second sub-data sequence. The first sub-guard interval sequence is located at the end of the first sub-data sequence, and the second sub-guard interval sequence is located at the end of the second sub-data sequence. The third sub-data sequence of symbols in the second data stream precedes the fourth sub-data sequence. The third sub-guard interval sequence is located at the end of the third sub-data sequence, and the fourth sub-guard interval sequence is located at the end of the fourth sub-data sequence.

In a fourth aspect, an embodiment of the present application provides a communication device, where the communication device includes a transceiver unit and a processing unit. The transceiver unit is used for receiving data frames from the first communication device. The data sequence and guard interval sequence in one DFT-S-OFDM symbol of the data frame are respectively divided into multiple sub-data sequences and multiple sub-guard interval sequences. Each sub-guard interval sequence is located at the end of the sub-data sequence, and the n+1-th sub-data sequence is adjacent to the n-th sub-guard interval sequence. The processing unit is configured to perform phase estimation and phase compensation on the sub-data sequence according to the arrangement order of the sub-data sequence and the sub-guard interval sequence.

In a possible design, the processing unit is further configured to acquire multiple phases corresponding to multiple sub-guard interval sequences respectively. For each sub-data sequence, the processing unit is further configured to perform phase estimation and phase compensation on the sub-data sequence according to the phases corresponding to the sub-guard interval sequences at the beginning and the end of the sub-data sequence.

In a fifth aspect, an embodiment of the present application provides a communication device, where the device has a function of implementing the data processing method provided in the first aspect. This function can be implemented by hardware or by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above functions.

In a sixth aspect, an embodiment of the present application provides a communication device, where the device has a function of implementing the data processing method provided in the second aspect. This function can be implemented by hardware or by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above functions.

In a seventh aspect, an embodiment of the present application provides a communication system, where the communication system includes the communication device provided in the third aspect or the fifth aspect and the communication device provided in the fourth aspect or the sixth aspect.

In an eighth aspect, embodiments of the present application provide a computer-readable storage medium, where the readable storage medium includes a program or an instruction, and when the program or instruction is run on a computer, the computer executes the first aspect or the first aspect. method in any of the possible implementations.

In a ninth aspect, an embodiment of the present application provides a computer-readable storage medium, where the readable storage medium includes a program or an instruction, when the program or instruction is run on a computer, the computer executes the second aspect or the second aspect. method in any of the possible implementations.

In a tenth aspect, an embodiment of the present application provides a chip or a chip system, the chip or chip system includes at least one processor and an interface, the interface and the at least one processor are interconnected through a line, and the at least one processor is used for running a computer program or instruction, to perform the method described in any one of the first aspect or any of the possible implementations of the first aspect.

In an eleventh aspect, an embodiment of the present application provides a chip or a chip system, the chip or chip system includes at least one processor and an interface, the interface and the at least one processor are interconnected through a line, and the at least one processor is used for running a computer program or instruction , to perform the method described in any one of the second aspect or any possible implementation manner of the second aspect.

Wherein, the interface in the chip may be an input/output interface, a pin or a circuit, or the like.

The chip system in the above aspects may be a system on chip (system on chip, SOC), or a baseband chip, etc., where the baseband chip may include a processor, a channel encoder, a digital signal processor, a modem, an interface module, and the like.

In a possible implementation, the chip or chip system described above in this application further includes at least one memory, where instructions are stored in the at least one memory. The memory may be a storage unit inside the chip, such as a register, a cache, etc., or a storage unit of the chip (eg, a read-only memory, a random access memory, etc.).

A twelfth aspect, embodiments of the present application provide a computer program or computer program product, including codes or instructions, when the codes or instructions are run on a computer, the computer executes the first aspect or any one of the first aspects may be implemented method in method.

In a thirteenth aspect, the embodiments of the present application provide a computer program or computer program product, including codes or instructions, when the codes or instructions are run on a computer, the computer executes the second aspect or any one of the second aspects may be implemented method in method.

Description of drawings

FIG. 1a is a schematic diagram of a DFT-S-OFDM transmitter according to an embodiment of the application;

FIG. 1b is a schematic diagram of a DFT-S-OFDM receiver provided by an embodiment of the application;

Fig. 2 is the transmission schematic diagram of the data part of the physical layer frame in the 802.11ay standard;

3 is a schematic diagram of a partial frame of short GI data in DFT-S-OFDM mode;

FIG. 4 is a schematic diagram of a network scenario provided by an embodiment of the present application;

5 is a schematic flowchart of a data processing method provided by an embodiment of the present application;

6 is a schematic diagram of a GI sequence provided in the embodiment of the present application being divided into two sub-GI sequences;

7 is a schematic diagram of a GI sequence provided in the embodiment of the present application being divided into four sub-GI sequences;

8 is a schematic diagram of a GI sequence provided in the embodiment of the present application being divided into three sub-GI sequences;

9 is a schematic diagram of a GI sequence provided in the embodiment of the present application being divided into five sub-GI sequences;

10 is a schematic flowchart of another data processing method provided by an embodiment of the present application;

11 is a schematic diagram of a first data flow and a second data flow provided by an embodiment of the present application;

12 is a schematic diagram of a first data flow, a second data flow, and a third data flow provided by an embodiment of the present application;

13 is a schematic diagram of another first data flow, a second data flow, and a third data flow provided by an embodiment of the present application;

14 is a schematic diagram of phase correction performance when a GI sequence is divided into two sub-GI sequences according to an embodiment of the present application;

15 is a schematic diagram of phase correction performance when a GI sequence provided by an embodiment of the application is divided into four sub-GI sequences;

16 is a schematic diagram of phase correction performance when a GI sequence provided by an embodiment of the present application is divided into eight sub-GI sequences;

17 is a schematic diagram of phase correction performance when a GI sequence provided by an embodiment of the present application is divided into sixteen sub-GI sequences;

FIG. 18 is a schematic diagram of a communication device provided by an embodiment of the present application;

FIG. 19 is a schematic diagram of another communication device provided by an embodiment of the present application;

FIG. 20 is a schematic diagram of still another communication device provided by an embodiment of the present application;

FIG. 21 is a schematic diagram of still another communication device provided by an embodiment of the present application.

Detailed ways

In the embodiments of the present application, words such as "exemplary" or "for example" are used to represent examples, illustrations or illustrations. Any embodiments or designs described in the embodiments of the present application as "exemplary" or "such as" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present the related concepts in a specific manner.

In the embodiments of the present application, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance or implying indicated the number of technical characteristics. Thus, a feature defined as "first", "second", "third", "fourth" may expressly or implicitly include one or more of that feature. In the description of this application, unless stated otherwise, "plurality" means two or more.

It is to be understood that the terminology used in describing the various described examples herein is for the purpose of describing particular examples and is not intended to be limiting. As used in the description of the various described examples and the appended claims, the singular forms "a", "an")" and "the" are intended to include the plural forms as well, unless the context dictates otherwise. clearly instructed.

It should be understood that, in each embodiment of the present application, the size of the sequence number of each process does not mean the sequence of execution, and the execution sequence of each process should be determined by its function and internal logic, rather than the implementation of the embodiments of the present application The process constitutes any qualification.

It should be understood that determining B according to A does not mean that B is only determined according to A, and B may also be determined according to A and/or other information.

It will also be understood that the term "includes" (also referred to as "includes", "including", "comprises" and/or "comprising") when used in this specification designates the presence of stated features, integers, steps, operations, elements , and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groupings thereof.

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

Orthogonal frequency division multiplexing (OFDM) technology has been widely adopted in existing wireless local area network (WLAN) standards to improve the spectrum utilization and transmission reliability of the system. Among them, the protocol standard 802.11n/ac is the most widely used WLAN wireless standard. In order to improve speed, throughput, and reduce power consumption, the protocol standard 802.11ax/ad/ay came into being. 802.11ax is a natural evolution of 802.11ac/n, which also works in the 2.4/5 gigahertz (GHz) frequency band. And 802.11ad/ay is used as an auxiliary technology, working in the 60GHz frequency band, with large bandwidth and no interference, so the rate can reach very high. 802.11ad based on 60GHz can achieve a data transmission rate of 8Gbps, while its next-generation 802.11ay standard peak rate is as high as 176Gbps, which can be used in scenarios such as high-definition transmission, wireless screen projection, and wireless backhaul.

However, traditional OFDM transmission signals have a high peak to average power ratio (PAPR). In order to avoid in-band signal distortion and out-of-band leakage, the transmitter needs to have a large power. However, it will lead to low utilization efficiency of the power amplifier of the transmitter, which has a great impact on the uplink transmission. At the same time, the single-carrier transmission waveform required by the 802.11ad/ay standard has a very low PAPR, but it is difficult for a single-carrier to perform frequency division multiplexing. This is a big constraint in frequency division multiplexing for the next-generation 60GHz WLAN standard for multi-users.

In summary, in order to support multi-user frequency division multiplexing and reduce the PAPR of the system, it can be considered to introduce discrete Fourier transform extended orthogonal frequency division multiplexing (discrete Fourier transform spread OFDM, DFT- S-OFDM) transmission technology. DFT-S-OFDM transmission technology has the characteristics of single-carrier transmission waveform in essence. Therefore, DFT-S-OFDM has a very low PAPR, and can support multiple users in frequency multiplexing at the same time. Figure 1a and Figure 1b show the transmitter and receiver structures of DFT-S-OFDM transmission, respectively. Among them, the DFT-S-OFDM transmitter adds a DFT module to the front end of the inverse fast Fourier transform (IFFT) module of the traditional OFDM transmitter, as shown in Figure 1a. Other modules are identical to their counterparts in conventional OFDM transmitters and perform similar functions.

The data transmission frame in the WLAN is divided into two parts: a preamble part and a data part. Similar to the 801.11ad/ay single-carrier mode, a guard interval (GI) sequence, such as a Gray sequence, needs to be inserted between DFT-S-OFDM symbols. GI sequences are used for phase estimation, phase compensation, and optimal synchronization, etc. At the same time, the GI sequence needs to have lower PAPR at the frequency positions corresponding to each user. The GI sequences of different spatial streams need to have a certain orthogonality to avoid unnecessary beamforming effects.

Among them, the 802.11ay standard has a specific definition for the frame structure of the physical layer. GI needs to be inserted between the symbols of the data part of the physical layer frame to realize phase synchronization and phase tracking. Also, when there are multiple spatial streams, the inserted GI for each data stream is different, thereby avoiding detrimental beamforming effects. For example, a schematic diagram of the transmission of the data part of the physical layer frame in the 802.11ay standard is shown in FIG. 2 . The inserted GI sequence in Figure 2 is a Gray sequence with a length of 64

However, the interval between the GI sequences in the 801.11ad/ay standard is too large to effectively estimate and compensate the phase noise for high-order modulation. For example, for a high-frequency system using DFT-S-OFDM transmission, the DFT-S-OFDM transmission mode may be a GI or a cyclic prefix (cyclic prefix, CP) mode. For example, FIG. 3 is a schematic diagram of a partial frame of short GI data in the DFT-S-OFDM mode. It can be seen that the interval between the GI sequences is very large, and the receiving end cannot effectively perform phase estimation and phase compensation through the GI sequences. To reduce the spacing between GI sequences, the GI length can be increased. However, increasing the GI length has significant overhead. Meanwhile, for the last symbol, its GI is located before the last symbol. The last symbol cannot effectively use the front and rear GI for phase estimation and phase compensation. If you add another symbol carrying extra GI, it will increase the system overhead.

In order to solve the above problem, an embodiment of the present application provides a data processing method. The data processing method is conducive to more accurate phase estimation and phase compensation for the data frame.

FIG. 4 is a schematic diagram of a network scenario provided by an embodiment of the present application. The network scenario is a high-frequency WLAN scenario, including an access point (access point, AP) and a station (station, STA). Among them, the AP is the creator of a network and the central node of the network. For example, a wireless router used in a typical home or office is an AP. Each terminal (such as a notebook computer, a PDA (personal digital assistant, PDA) and other user equipment that can be networked) connected to a wireless network can be referred to as a site. The data processing method provided in the embodiment of the present application can be applied to the network scenario shown in FIG. 5 to process the data frame transmitted between the AP and the STA. It should be noted that the network scenario shown in FIG. 5 includes one AP and one STA, which is only an example. The network scenario may further include multiple STAs, and the multiple STAs may send data frames to the AP or receive data frames from the AP, which is not limited in this embodiment.

FIG. 5 is a schematic flowchart of a data processing method provided by an embodiment of the present application. The data processing method is realized by interaction between the first communication device and the second communication device. The first communication device in FIG. 6 is the transmitting end of the DFT-S-OFDM symbol, and the second communication device is the receiving end of the DFT-S-OFDM symbol. For example, the first communication device in FIG. 6 is the AP in FIG. 5 , and the second communication device is the STA in FIG. 5 . The data processing method includes the following steps:

501. The first communication device determines the discrete Fourier transform extended orthogonal frequency division multiplexing DFT-S-OFDM symbol carried by the data frame, and the guard interval sequence and the data sequence in one symbol are arranged in such a way that multiple sub-guard interval sequences are respectively located at The tail of multiple sub-data sequences, and the n+1-th sub-data sequence is adjacent to the n-th sub-guard interval sequence;

502, the first communication device performs transformation processing on the data frame, and sends the transformed data frame to the second communication device; correspondingly, the second communication device receives the data frame from the first communication device;

503. The second communication device performs phase estimation and phase compensation on the sub-data sequence according to the arrangement order of the sub-data sequence and the sub-guard interval sequence.

In order to reduce the interval between GI sequences, in this embodiment, the GI sequence of one symbol in each data frame to be sent will be divided into multiple sub-guard interval (sub-GI) sequences. In one implementation, the GI sequence in one symbol is divided into two sub-GI sequences of equal length. For example, the GI sequence shown in Figure 3 is 32 in length. The GI sequence is divided into two sub-GI sequences of equal length, and the length of each sub-GI sequence is 16, as shown in FIG. 6 . At the same time, the data sequence in one symbol is divided into multiple sub-data sequences. For example, the data sequence shown in Figure 3 has a length of 480. The data sequence is divided into two sub-data sequences of equal length, and the length of each sub-data sequence is 240, as shown in FIG. 6 .

The first communication device may also set an arrangement order between the sub-GI sequence and the sub-data sequence. In this embodiment, the multiple sub-guard interval sequences are respectively located at the tails of the multiple sub-data sequences, and the n+1 th sub-data sequence is adjacent to the n-th sub-guard interval sequence. For example, in a data frame in Fig. 6, two sub-GI sequences are located at the end of the two sub data sequences respectively. That is to say, the first sub-GI sequence of the data frame is located at the end of the first word data sequence, the second sub-data sequence is adjacent to the first sub-GI sequence, and the second sub-GI is located in the second sub-data sequence the tail, as shown in Figure 6. Specifically, for the first data frame of FIG. 6 , the first sub-data sequence is located at the 1st to 240th sub-carriers. The first sub-GI sequence is located at the 240th+1st to 240th+16th subcarriers. The second sub-data sequence is located at the 240th+16+1th to 240th+16+240th subcarriers. The second sub-GI is located at the 240th+16+240+1th to 240th+16+240+1+16th subcarriers. It should be noted that there is also a CP between each data frame in FIG. 6 , and each CP is located at the head of each data frame.

In another implementation, the GI sequence is divided into four sub-GI sequences of equal length. For example, the GI sequence shown in Figure 3 is 32 in length. The GI sequence is divided into four sub-GI sequences, and each sub-GI sequence is 8 in length. The data sequence shown in FIG. 3 is divided into four sub-data sequences of equal length, and the length of each sub-data sequence is 120, as shown in FIG. 7 . Among them, compared with Fig. 6, Fig. 7 has a smaller interval between GI sequences. Then the accuracy of the phase estimation of the data sequence is higher when the GI sequence is used.

Similarly, in a data frame of Fig. 7, four sub-GI sequences are located at the end of the four sub data sequences respectively. That is to say, the first sub-GI sequence of the data frame is located at the end of the first word data sequence, and the second sub-data sequence is adjacent to the first sub-GI sequence. The second sub-GI is located at the end of the second sub-data sequence, and the third sub-data sequence is adjacent to the end of the second sub-GI sequence. The third sub-GI is located at the end of the third sub-data sequence, and the fourth sub-data sequence is adjacent to the third sub-GI sequence. The fourth sub-GI is located at the end of the fourth sub-data sequence, as shown in FIG. 7 .

It should be noted that the data processing method in this embodiment can divide the GI sequence into any number of sub-GI sequences. For example, the GI sequence can be divided into 2, 4, and 8 sub-GI sequences, and each sub-GI sequence has the same length. Alternatively, it is not necessarily divided into power-of-2 sub-GI sequences. For example, the GI sequence is divided into 6 sub-GI sequences of equal length, etc., which is not limited in this embodiment. Wherein, the sub-GI sequences to be divided in this embodiment are defined as sequences of equal lengths, which is convenient for subsequent calculation of reference phases. The sub-data sequences in this embodiment may be divided into sequences of equal lengths, or may be divided into sequences of different lengths. The specific division method is determined according to the length of the data sequence. That is to say, the specific insertion method of each sub-GI sequence also tries to keep equal intervals between each sub-data sequence.

In another implementation manner, since the first sub-data sequence and the last sub-data sequence of a data frame are more seriously affected by phase noise, in order to take into account the first sub-data sequence and the last sub-data sequence, in this example, The last sub-GI sequence is divided into two sub-GI sequences of equal length. Moreover, the divided two sub-GI sequences are located at the head of the first sub-data sequence and the tail of the last sub-data sequence, respectively.

For example, in the sub-GI sequence shown in FIG. 6 , the sub-GI sequence originally located at the end of the last sub-data sequence is further divided into two sub-GI sequences with a length of 8. And, let the two sub-GI sequences with a length of 8 be located at the head of the first sub-data sequence and the tail of the second sub-data sequence, as shown in FIG. 8 . For another example, in the sub-GI sequence shown in FIG. 7 , the sub-GI sequence originally located at the end of the last sub-data sequence is further divided into two sub-GI sequences with a length of 4. And, let the two sub-GI sequences of length 4 be located at the head of the first sub-data sequence and the tail of the second sub-data sequence, as shown in FIG. 9 . It can be seen that using the sub-GI sequence division method as shown in Figure 8 or Figure 9 and the arrangement of the sub-GI sequence and sub-data sequence is conducive to more accurate phase estimation and phase estimation of the first sub-data sequence and the last sub-data sequence compensate.

After determining the order of arrangement between the sub-GI sequence and the sub-data sequence, the first communication device performs transformation processing on the data frame, and sends the transformed data frame to the second communication device. For example, the first communication device performs DFT and IFFT operations on the data frame according to the DFT-S-OFDM transmission mode, and sends the data frame after the DFT and IFFT operations to the second communication device. The process of transforming the data frame by the first communication device may be implemented by a discrete Fourier transform module and an inverse fast Fourier transform module as shown in FIG. 1a. For a specific implementation manner, reference may be made to the execution manner of a corresponding module in an existing DFT-S-OFDM transmitter, which will not be repeated here.

The second communication device receives the transformed data frame sent by the first communication device, and first performs inverse transformation processing on the data frame. For example, taking the CP-based DFT-S-OFDM system as an example, the receiving end (ie, the second communication device) of the data frame is shown in FIG. 1b. The second communication device first removes the CP, and then performs FFT transformation and frequency domain equalization on the data frame. Finally, the signal is converted back to the time domain by IFFT, and the sub-data sequence and sub-GI sequence in each symbol are obtained.

The second communication device performs phase estimation and phase compensation on the data symbols in each symbol according to the arrangement order of the sub-data sequence and the sub-GI sequence in each symbol. It should be noted that since there is a CP interval between symbols, the first sub-data sequence and the remaining sub-data sequences of each symbol need to be processed separately. For example, in the DFT-S-OFDM system, the receiving end first calculates the phases φ ₁ and φ ₂ using the known sub-GI reference sequence. These two phases respectively correspond to the sub-GI sequences before and after the non-first sub-data sequence (eg, corresponding to the two sub-GI sequences-16 before and after the second sub-data sequence-240 in FIG. 6).

In this embodiment, one sub-data sequence includes W data symbols. For the m-th data symbol in the non-first sub-data sequence, the calculation formula of the phase to be compensated for the data symbol m is shown in Equation 1.

Among them, Δφ _m represents the phase that needs to be compensated for the mth data symbol, and φ ₁ and φ ₂ represent the phases corresponding to the first and last sub-GI sequences of the sub-data sequence respectively. According to formula 1, the second communication device calculates and obtains the phase to be compensated for the non-first sub-data sequence in each symbol. For example, a non-first sub-data sequence includes 100 data symbols. According to Equation 1, the phase that needs to be compensated for the first data symbol in the 100 data symbols is:

Similarly, the phases that need to be compensated for the remaining 99 data symbols are calculated in turn, so as to perform phase compensation on the entire sub-data sequence.

For the first sub-data sequence in each symbol, the effect of CP interval also needs to be considered. Wherein, for the mth data symbol in the first sub-data sequence, the calculation formula of the phase estimation of the data symbol m is shown in Equation 2.

Among them, len(CP*) represents the equivalent length of CP after DFT and IFFT transformation, and the calculation formula is shown in Equation 3.

len(CP*)=DFT_size len(CP)/IFFT_size (3)

Among them, DFT_size represents the influence parameter of the DFT transformation on the CP length, and IFFT_size represents the influence parameter of the IFFT transformation on the CP length. After calculating and obtaining W-1+len(CP*) phase compensation values according to formula 2 and formula 3, the second communication device obtains the last W phase compensation values to perform phase compensation on the first sub-data sequence. That is to say, for the mth data symbol in the first sub-data sequence, the calculation formula of the phase to be compensated for the data symbol m is shown in Equation 4. Compared with Equation 3, Equation 4 further defines the phase compensation value (W phase compensation values in total).

It can be seen that, through the above formulas 1-4, the second communication device can perform phase estimation and phase compensation on the sub-data sequence.

An embodiment of the present application provides a data processing method, and the method is executed by a first communication device. The first communication device divides the data sequence and the guard interval sequence in the DFT-S-OFDM symbol into multiple sub-data sequences and multiple sub-guard interval sequences, respectively. The first communication device makes each sub-guard interval sequence located at the end of the sub-data sequence, and the n+1 th sub-data sequence is adjacent to the n-th sub-guard interval sequence. It can be seen that the sub-data sequence can effectively use the sub-guard interval sequence before and after to perform more accurate phase estimation and phase compensation.

An embodiment of the present application provides a data processing method, where the data processing method is implemented by interaction between a first communication device and a second communication device. The first communication device divides the data sequence and the guard interval sequence in the DFT-S-OFDM symbol into multiple sub-data sequences and multiple sub-guard interval sequences, respectively. The first communication device makes each sub-guard interval sequence located at the end of the sub-data sequence, and the n+1 th sub-data sequence is adjacent to the n-th sub-guard interval sequence. The second communication device can effectively utilize the sub-guard interval sequences before and after the sub-data sequence to perform more accurate phase estimation and phase compensation.

FIG. 10 is a schematic flowchart of another data processing method provided by an embodiment of the present application. The data processing method is realized by interaction between the first communication device and the second communication device. The first communication device in FIG. 6 is the transmitting end of the DFT-S-OFDM symbol, and the second communication device is the receiving end of the DFT-S-OFDM symbol. Compared with the data processing method in the embodiment of FIG. 5 , the data processing method in the embodiment of FIG. 10 processes multiple data streams between the first communication device and the second communication device. More accurate phase estimation and phase compensation can be achieved for multiple data streams, and spatially detrimental beamforming effects of multiple data streams can be avoided. The data processing method includes the following steps:

1001. The first communication device determines that a first guard interval sequence of symbols in a first data stream includes a first sub-guard interval sequence and a second sub-guard interval sequence, and the first data sequence of symbols in the first data stream includes a first sub-guard interval sequence. a data sequence and a second sub-data sequence;

1002. The first communication device determines that the second guard interval sequence of symbols in the second data stream includes a third sub-guard interval sequence and a fourth sub-guard interval sequence, and the second data sequence of symbols in the second data stream includes a third sub-guard interval sequence. the data sequence and the fourth sub-data sequence;

1003, the first communication device determines that multiple sub-guard interval sequences of symbols in the first data stream are respectively located at the tail of multiple sub-data sequences, and determines that multiple sub-guard interval sequences of symbols in the second data stream are located at the tail of multiple sub-data sequences, respectively, And the n+1th sub-data sequence in the first data stream or the second data stream is adjacent to the end of the nth sub-guard interval sequence;

1004, the first communication device performs transformation processing on the first data stream, and performs transformation processing on the second data stream;

1005, the first communication device sends the transformed first data stream and the second data stream to the second communication device; correspondingly, the second communication device receives the first data stream and the second data stream from the first communication device;

1006, the second communication device performs phase estimation and phase compensation on the sub-data sequence in the first data stream according to the arrangement order of the sub-data sequence and the sub-guard interval sequence in the first data stream; and according to the sub-data sequence in the second data stream and the arrangement order of the sub-guard interval sequences, phase estimation and phase compensation are performed on the sub-data sequences in the second data stream.

In this embodiment, there are multiple data stream transmissions between the first communication device and the second communication device. If the same time-domain signal sequence is sent simultaneously in multiple data streams, it will cause unwanted beamforming effects in space. In order to avoid this situation, in this embodiment, the sub-GI sequences in each data stream are transformed, so that the sequences in the multiple data streams are different time-domain signal sequences.

The following takes two data streams as an example for detailed description. Wherein, for the first data stream and the second data stream, the first sub-guard interval sequence and the third sub-guard interval sequence are different guard interval sequences, and/or, the second sub-guard interval sequence and the fourth sub-guard interval sequence The spacer sequences are different guard spacer sequences. That is to say, the sub-GI sequences at the same time domain position of the first data stream and the second data stream sent at the same time need to be transformed.

For example, the GI sequence of one symbol in the first data stream is divided into two sub-GI sequences of equal length, and the length of each sub-GI sequence is 16, as shown in FIG. 11 . Wherein, the first sub-GI sequence (as shown by the shaded square in FIG. 11 ) and the second sub-GI sequence (as shown by the solid color square in FIG. 11 ) of the first data stream are different sub-GI sequences. The GI sequence of one symbol in the second data stream also includes two sub-GI sequences, and the position order of the two sub-GI sequences of one symbol (as shown in Figure 11, the shaded square is located after the solid-colored square) is the first data stream Figure 11 shows the shifted positional order of two sub-GI sequences in the same time domain. It can be seen that the sub-GI sequences between different data streams can be shifted to avoid the same sequence being in the same time domain interval. Among them, Figure 11 shows a simple mode of two data streams. That is, one character of each data stream contains two sub-GI sequences, and the positions of the two sub-GIs of symbols in the same position of different data streams may be exchanged. In this case, spatially detrimental beamforming effects can be avoided between the first data stream and the second data stream.

The multiple sub-guard interval sequences of symbols in the first data stream or the second data stream are respectively located at the end of the multiple sub-data sequences, and the n+1th sub-data sequence in the first data stream or the second data stream is the same as the n-th sub-data sequence. The sub-guard interval sequences are adjacent to each other. For the arrangement of the sub-data sequence and the sub-GI sequence in the symbols of the first data stream or the second data stream, reference may be made to the corresponding descriptions in the embodiments of FIG. 5 and FIG. 6 . For example, in the symbol of the first data stream in FIG. 11 , the first sub-GI sequence is located at the end of the first sub-data sequence, and the second sub-GI sequence is located at the end of the second sub-data sequence. In the symbols of the second data stream, the first sub-GI sequence is located at the end of the first sub-data sequence, and the second sub-GI sequence is located at the end of the second sub-data sequence. The above sorting method is beneficial to perform more accurate phase estimation and phase compensation on the sub-data sequence in each symbol.

After determining the arrangement order of the sub-data sequence and the sub-GI sequence of the symbols in the first data stream and the second data stream, the first communication device performs transformation processing on the first data stream, and performs transformation processing on the second data stream. For example, the first communication device performs DFT and IFFT operations on the first data stream and the second data stream according to the DFT-S-OFDM transmission mode, and sends the first data stream and the second data stream after the DFT and IFFT operations to the second communication device data flow. The process of transforming the first data stream and the second data stream by the first communication device may be implemented by a discrete Fourier transform module and an inverse fast Fourier transform module as shown in FIG. 1a. For a specific implementation manner, reference may be made to the execution manner of a corresponding module in an existing DFT-S-OFDM transmitter, which will not be repeated here.

The first communication device sends the transformed first data stream and the second data stream to the second communication device; correspondingly, the second communication device receives the first data stream and the second data stream from the first communication device. The second communication device performs phase estimation and phase compensation on the sub-data sequence in the first data stream according to the arrangement order of the sub-data sequence and the sub-guard interval sequence in the first data stream; and according to the sub-data sequence and the sub-guard interval in the second data stream The arrangement sequence of the spacer sequence is used to perform phase estimation and phase compensation on the sub-data sequences in the second data stream. For a specific implementation manner, reference may be made to the description of the corresponding steps in the embodiment of FIG. 5 , which will not be repeated here.

In one example, three or more data streams may be simultaneously transmitted between the first communication device and the second communication device. The interaction process between the first communication device and the second communication device is similar to the interaction process in the embodiment of FIG. 10 , and details are not repeated here. The following takes three data streams as examples to describe the GI sequences of different data streams in detail. Wherein, the GI sequence of one symbol in the data stream is divided into two sub-GI sequences of equal length, and the length of each sub-GI sequence is 16 as an example for description. In order to avoid the harmful spatial beamforming effect caused by the same time-domain signal sequence when multiple data streams are sent simultaneously, the guard interval characters in the respective sub-GI sequences in the multiple data streams in this embodiment may be cyclically shifted bits, so that the sub-GI sequences of different data streams at the same time domain position are different. Wherein, the GI sequence in one data stream includes multiple GI symbols.

In an implementation manner, the first communication device first sorts the GI symbols of the GI sequence in the first data stream, the second data stream and the third data stream, and then divides the GI sequence and the data sequence. The multiple GI symbols of the GI sequence in the first data stream are arranged in the first order, the multiple GI symbols of the GI sequence in the second data stream are arranged in the second order, and the multiple GI symbols of the GI sequence in the third data stream are arranged in the second order. Arranged in third order. The second order is an order in which the first order cyclically shifts the plurality of GI symbols according to the first cyclic shift coefficient. The third order is the order in which the plurality of GI symbols are cyclically shifted according to the second cyclic shift coefficient in the first order. The first cyclic shift coefficient is different from the second cyclic shift coefficient. Then, the first communication device divides the cyclically shifted GI sequence into sub-GI sequences. For example, the first communication device divides the GI sequences in the first data stream, the second data stream, and the third data stream into two sub-GI sequences, respectively. sub-GI sequences.

For example, FIG. 12 is a schematic diagram of three data streams provided by an embodiment of the present application. The GI symbols of the GI sequence in the first data stream are arranged in a first order. The GI symbols of the GI sequence in the second data stream are arranged in the second order. The second sequence is to cyclically shift the last GI symbol of the GI sequence in the first data stream to the position of the first GI symbol of the GI sequence, as shown in the GI sequence of the second data stream in FIG. 12 . The GI symbols of the GI sequence in the third data stream are arranged in a third order. The third sequence is to cyclically shift the last two GI symbols of the GI sequence in the first data stream to the positions of the first and second GI symbols of the GI sequence, as shown in the GI sequence of the third data stream in FIG. 12 . Show. According to the arrangement sequence of the GI symbols, the GI sequences of the first data stream, the second data stream, and the third data stream are different GI sequences, so as to prevent the same sequences from being in the same time domain interval. Wherein, both the second data stream and the third data stream can be regarded as the first data stream cyclically shifts the GI symbols in the GI sequence according to the cyclic shift coefficient, but the cyclic shift coefficient of the second data stream and the third data stream different. After determining the arrangement order of the GI symbols of the GI sequences in the first data stream, the second data stream, and the third data stream, the first communication device may divide the GI sequences and data sequences of the symbols in each data stream into multiple sub- GI sequences and subdata sequences. For example, in FIG. 12, one symbol of the data stream is divided into two sub-GI sequences and two sub-data sequences, respectively.

In another implementation manner, the first communication device first divides the GI sequence and the data sequence in the first data stream, the second data stream and the third data stream, and then divides each sub-GI sequence corresponding to each data stream Perform a cyclic shift. The multiple GI symbols of the sub-GI sequence in the first data stream are arranged in the first order, the multiple GI symbols of the sub-GI sequence in the second data stream are arranged in the second order, and the sub-GI symbols in the third data stream are arranged in the second order. The multiple GI symbols of the sequence are arranged in a third order. Wherein, the second order and the third order are respectively the order in which the first order is cyclically shifted according to one or more guard interval symbols, and the second order and the third order are different orders.

For example, FIG. 13 is a schematic diagram of another three data streams provided by an embodiment of the present application. In the first data stream of FIG. 13 , the first symbol includes two sub-data sequences with a length of 240 and two sub-GI sequences with a length of 16. The order of the last two GI symbols of each sub-GI sequence in this symbol is shown in Figure 12. The GI symbols of each sub-GI sequence in the second data stream are arranged in the second order. The second sequence is to cyclically shift the last GI symbol of a sub-GI sequence in the first data stream to the position of the first GI symbol of the sub-GI sequence, as shown in the sub-GI of the second data stream in Figure 13 sequence shown. The GI symbols of each sub-GI sequence in the third data stream are arranged in a third order. The third sequence is to cyclically shift the last two GI symbols of a sub-GI sequence in the first data stream to the positions of the first and second GI symbols of the sub-GI sequence, as shown in the third data in Figure 13 The sub-GI sequence of the stream is shown. According to the arrangement sequence of the GI symbols, the GI sequences of the first data stream, the second data stream, and the third data stream are different GI sequences, so as to prevent the same sequences from being in the same time domain interval. Wherein, both the second data stream and the third data stream can be regarded as the first data stream cyclically shifts the GI symbols in the GI sequence according to the cyclic shift coefficient, but the cyclic shift coefficient of the second data stream and the third data stream different. For the same data stream, the cyclic shift coefficients of GI symbols in different sub-GI sequences of the same data stream are the same. For example, each sub-GI sequence in the second data stream has the same cyclic shift coefficient of the GI symbols in the sub-GI sequence with respect to the sub-GI sequence at the same position in the first data stream, as shown in FIG. 13 . .

Wherein, when the first communication device and the second communication device transmit three or more data streams at the same time, the arrangement order of the GI symbols of the GI sequence in each data stream or the arrangement order of the GI symbols of the sub-GI sequence is the same as that in FIG. 12 or FIG. 13 . The sorting order in is similar. That is, the first communication device first sorts the GI symbols of the GI sequence in the first data stream, the second data stream up to the nth data stream (n is a positive integer greater than 3), and then divides the GI sequence and the data sequence; Alternatively, the first communication device first divides the GI sequence and the data sequence in the first data stream, the second data stream and the nth data stream, and then cyclically shifts each sub-GI sequence corresponding to each data stream. For a specific implementation, refer to the descriptions in the embodiments of FIG. 12 and FIG. 13 , and details are not repeated here.

The embodiment of the present application provides another data processing method, and the method is implemented by interaction between a first communication device and a second communication device. Wherein, when the first communication device simultaneously transmits multiple data streams to the second communication device, the GI sequences of the symbols of each data stream at the same time domain position are different, so that harmful beamforming effects can be avoided. The symbol neutron guard interval sequences of the multiple data streams are respectively located at the end of the sub data sequences, and the n+1 th sub data sequence is adjacent to the n th sub guard interval sequence. The second communication device can effectively utilize the sub-guard interval sequences before and after the sub-data sequence to perform more accurate phase estimation and phase compensation.

According to the description of the data processing method provided by the embodiments of the present application in the embodiments of FIGS. 5 to 13 , the phase correction performance when the second communication device adopts the data processing method is described below with reference to FIGS. 14 to 17 . Among them, Fig. 14 to Fig. 17 show the constellation diagrams under different modulation modes (16QAM and 64QAM).

FIG. 14 is a schematic diagram of the phase correction performance when one GI sequence is divided into two sub-GI sequences. Wherein, the sub-picture (1) in FIG. 14 is the constellation diagram after phase correction when the data processing method provided by the embodiment of the present application is adopted under the 16QAM modulation mode, and the sub-picture (2) is the constellation diagram before the phase correction under the 16QAM modulation mode . It can be seen that the sub-image (1) after phase correction is smaller than the sub-image (2) before phase correction, and the phase shift in the constellation diagram is smaller. The sub-picture (3) in FIG. 14 is the constellation diagram after the phase correction when the data processing method provided by the embodiment of the present application is adopted under the 64QAM modulation mode, and the sub-picture (4) is the constellation diagram before the phase correction under the 64QAM modulation mode. It can be seen that the sub-picture (3) after phase correction is smaller than the sub-picture (4) before phase correction, and the phase shift in the constellation diagram is smaller.

Similarly, Figure 15 is a schematic diagram of the phase correction performance when one GI sequence is divided into four sub-GI sequences. FIG. 16 is a schematic diagram of the phase correction performance when one GI sequence is divided into eight sub-GI sequences. FIG. 17 is a schematic diagram of the phase correction performance when one GI sequence is divided into sixteen sub-GI sequences. For the description of each sub-picture in FIG. 15 to FIG. 17 , reference may be made to the description of each sub-picture in FIG. 14 , which will not be repeated here. According to the phase-corrected constellation diagrams in FIGS. 14 to 17 , when a GI sequence is divided into more sub-GI sequences, the phase correction performance is higher. That is, the more sub-GI sequences a GI sequence is divided into, the smaller the phase offset in the phase-corrected constellation. For example, sub-picture (3) in FIG. 17 is a constellation diagram after phase correction when the data processing method provided by the embodiment of the present application is adopted in the 64QAM modulation mode. It can be seen that the sub-picture (3) of Fig. 17 is smaller than the sub-picture (3) of Fig. 14, the phase offset in the constellation diagram is smaller, and the phase correction performance is better.

The data processing method of the embodiment of the present application is described in detail above with reference to FIG. 4 to FIG. 17 . The communication device according to the embodiment of the present application will be described in detail below with reference to FIG. 18 to FIG. 21 . It should be understood that the communication devices shown in FIGS. 18 to 21 can implement one or more steps in the method flows shown in FIGS. 5 and 10 . In order to avoid repetition, detailed description is omitted here.

FIG. 18 is a schematic diagram of a communication device according to an embodiment of the present application. The communication device shown in FIG. 18 is used to implement the method performed by the first communication device in the above-mentioned embodiments shown in FIG. 5 and FIG. 10 . The communication device includes a processing unit 1801 and a transceiver unit 1802 . The processing unit 1801 is configured to determine the discrete Fourier transform extended orthogonal frequency division multiplexing DFT-S-OFDM symbols carried by the data frame. The arrangement order of the guard interval sequence and the data sequence in a symbol is that the multiple sub-guard interval sequences are respectively located at the end of the multiple sub-data sequences, and the n+1 th sub-data sequence is adjacent to the n th sub-guard interval sequence. Wherein, n satisfies 0≤n≤N, and N is a positive integer. The processing unit 1801 is also used for transforming the data frame. The transceiver unit 1802 is configured to send the transformed data frame to the second communication device.

In an implementation manner, the guard interval sequence in one symbol includes a first sub-guard interval sequence and a second sub-guard interval sequence, and the lengths of the first sub-guard interval sequence and the second sub-guard interval sequence are the same. The data sequence in one symbol includes a first sub-data sequence and a second sub-data sequence.

In an implementation manner, the first sub-data sequence is located before the second sub-data sequence, the first sub-guard interval sequence is located at the end of the first sub-data sequence, and the second sub-guard interval sequence is located at the end of the second sub-data sequence.

In an implementation manner, the guard interval sequence in one symbol includes a first sub-guard interval sequence, a second sub-guard interval sequence, and a third sub-guard interval sequence. The lengths of the first sub-guard interval sequence and the third sub-guard interval sequence are the same. The length of the second sub-guard interval sequence is the sum of the lengths of the first sub-guard interval sequence and the third sub-guard interval sequence. The data sequence in one symbol includes a first sub-data sequence and a second sub-data sequence.

In an implementation manner, the first sub-data sequence is located before the second sub-data sequence, the first sub-guard interval sequence is located at the head of the first sub-data sequence, and the second sub-guard interval sequence is located at the beginning of the first sub-data sequence Tail, the third sub-guard interval sequence is located at the tail of the second sub-data sequence.

In an implementation manner, the processing unit 1801 is configured to determine the discrete Fourier transform extended orthogonal frequency division multiplexing DFT-S-OFDM symbols carried by the data frame, including:

It is determined that the first guard interval sequence of the symbol in the first data stream includes a first sub-guard interval sequence and a second sub-guard interval sequence, and the lengths of the first sub-guard interval sequence and the second sub-guard interval sequence are consistent;

It is determined that the second guard interval sequence of the symbols in the second data stream includes a third sub-guard interval sequence and a fourth sub-guard interval sequence; the lengths of the third sub-guard interval sequence and the fourth sub-guard interval sequence are the same; the first sub-guard interval sequence The sequence and the third sub-guard interval sequence are different guard interval sequences, and/or, the second sub-guard interval sequence and the fourth sub-guard interval sequence are different guard interval sequences;

determining that the first data sequence of symbols in the first data stream includes a first sub-data sequence and a second sub-data sequence;

In an implementation manner, the multiple guard interval symbols in the sub-guard interval sequence in the first data stream are arranged in a first order. The plurality of guard interval symbols in the sub-guard interval sequence in the second data stream are arranged in a second order. The second sequence is the sequence in which the first sequence is cyclically shifted according to one or more guard interval symbols.

In an implementation manner, the first sub-data sequence of symbols in the first data stream is located before the second sub-data sequence, the first sub-guard interval sequence is located at the end of the first sub-data sequence, and the second sub-guard interval sequence is located at the end of the first sub-data sequence The tail of the second sub data sequence. The third sub-data sequence of symbols in the second data stream is located before the fourth sub-data sequence, the third sub-guard interval sequence is located at the end of the third sub-data sequence, and the fourth sub-guard interval sequence is located at the end of the fourth sub-data sequence .

In an implementation manner, the relevant functions implemented by each unit in FIG. 18 can be implemented by a transceiver and a processor. FIG. 19 is a schematic diagram of another communication device provided by an embodiment of the present application. The communication device may be a device (eg, a chip) capable of executing the data processing methods in the embodiments shown in FIG. 5 and FIG. 10 . The communication device may include a transceiver 1901 , at least one processor 1902 and memory 1903 . Wherein, the transceiver 1901, the processor 1902 and the memory 1903 may be connected to each other through one or more communication buses, and may also be connected to each other in other ways.

The transceiver 1901 may be used for sending data or receiving data. It can be understood that the transceiver 1901 is a general term and may include a receiver and a transmitter.

The processor 1902 may be used to process the data of the server. The processor 1902 may include one or more processors, for example, the processor 1902 may be one or more central processing units (CPUs), network processors (NPs), hardware chips, or any combination thereof . In the case where the processor 1902 is a CPU, the CPU may be a single-core CPU or a multi-core CPU.

Among them, the memory 1903 is used for storing program codes and the like. The memory 1903 may include a volatile memory (volatile memory), such as random access memory (RAM); the memory 1903 may also include a non-volatile memory (non-volatile memory), such as a read-only memory (read- only memory, ROM), flash memory (flash memory), hard disk drive (HDD) or solid-state drive (solid-state drive, SSD); the memory 1903 may also include a combination of the above-mentioned types of memory.

The above-mentioned processor 1902 and memory 1903 may be coupled through an interface, or may be integrated together, which is not limited in this embodiment.

The transceiver 1901 and the processor 1902 described above can be used to execute the data processing methods in the embodiments shown in FIG. 5 and FIG. 10 , and the specific implementation is as follows:

The processor 1902 determines that the discrete Fourier transform extended orthogonal frequency division multiplexing DFT-S-OFDM symbol carried by the data frame, the guard interval sequence and the data sequence in one symbol are arranged in an order that multiple sub-guard interval sequences are located in multiple sub-data sequences respectively. The tail of the sequence, and the n+1th sub-data sequence is adjacent to the nth sub-guard interval sequence; n satisfies 0≤n≤N, and N is a positive integer;

The processor 1902 is further configured to transform the data frame;

The transceiver 1901 is configured to send the transformed data frame to the second communication device.

In an implementation manner, the guard interval sequence in one symbol includes a first sub-guard interval sequence and a second sub-guard interval sequence. The lengths of the first sub-guard interval sequence and the second sub-guard interval sequence are the same. The data sequence in one symbol includes a first sub-data sequence and a second sub-data sequence.

In one implementation, the first sub-data sequence precedes the second sub-data sequence. The first sub-guard interval sequence is located at the end of the first sub-data sequence, and the second sub-guard interval sequence is located at the end of the second sub-data sequence.

In one implementation, the first sub-data sequence precedes the second sub-data sequence. The first sub-guard interval sequence is located at the head of the first sub-data sequence, and the second sub-guard interval sequence is located at the tail of the first sub-data sequence. The third sub-guard interval sequence is located at the end of the second sub-data sequence.

In an implementation manner, the processor 1902 is configured to determine the discrete Fourier transform extended orthogonal frequency division multiplexing DFT-S-OFDM symbols carried by the data frame, including:

In an implementation manner, the multiple guard interval symbols in the sub-guard interval sequence in the first data stream are arranged in a first order. The plurality of guard interval symbols of the neutron guard interval sequence in the second data stream are arranged in a second order. The second sequence is the sequence in which the first sequence is cyclically shifted according to one or more guard interval symbols.

In one implementation, the first sub-data sequence of symbols in the first data stream precedes the second sub-data sequence. The first sub-guard interval sequence is located. The tail of the first sub data sequence. The second sub-guard interval sequence is located at the end of the second sub-data sequence. The third sub-data sequence of symbols in the second data stream precedes the fourth sub-data sequence. The third sub-guard interval sequence is located at the end of the third sub-data sequence. The fourth sub-guard interval sequence is located at the end of the fourth sub-data sequence.

FIG. 20 is a schematic diagram of still another communication device provided by an embodiment of the present application. The communication device shown in FIG. 20 is used to implement the method performed by the second communication device in the above-mentioned embodiments shown in FIG. 5 and FIG. 10 . The communication device includes a transceiver unit 2001 and a processing unit 2002 . The transceiver unit 2001 is used for receiving data frames from the first communication device. The data sequence and guard interval sequence in one DFT-S-OFDM symbol of the data frame are respectively divided into multiple sub-data sequences and multiple sub-guard interval sequences. Each sub-guard interval sequence is located at the end of the sub-data sequence, and the n+1-th sub-data sequence is adjacent to the n-th sub-guard interval sequence. The processing unit 2002 is configured to perform phase estimation and phase compensation on the sub-data sequence according to the arrangement order of the sub-data sequence and the sub-guard interval sequence.

In an implementation manner, the processing unit 2002 is further configured to acquire multiple phases corresponding to multiple sub-guard interval sequences respectively. For each sub-data sequence, the processing unit 2002 is further configured to perform phase estimation and phase compensation on the sub-data sequence according to the phases corresponding to the sub-guard interval sequences at the beginning and the end of the sub-data sequence.

In an implementation manner, the related functions implemented by each unit in FIG. 20 may be implemented by a transceiver and a processor. FIG. 21 is a schematic diagram of still another communication device provided by an embodiment of the present application. The communication device may be a device (eg, a chip) capable of executing the data processing methods in the embodiments shown in FIG. 5 and FIG. 10 . The communication device may include a transceiver 2101 , at least one processor 2102 and a memory 2103 . The transceiver 2101, the processor 2102 and the memory 2103 may be connected to each other through one or more communication buses, or may be connected to each other in other ways.

The transceiver 2101 may be used for sending data or receiving data. It can be understood that the transceiver 2101 is a general term and may include a receiver and a transmitter.

The processor 2102 may be used to process the data of the server. The processor 2102 may include one or more processors, for example, the processor 2102 may be one or more central processing units (CPUs), network processors (NPs), hardware chips or any combination thereof . In the case where the processor 2102 is a CPU, the CPU may be a single-core CPU or a multi-core CPU.

Among them, the memory 2103 is used to store program codes and the like. The memory 2103 may include a volatile memory (volatile memory), such as random access memory (RAM); the memory 2103 may also include a non-volatile memory (non-volatile memory), such as a read-only memory (read- only memory, ROM), flash memory (flash memory), hard disk drive (HDD) or solid-state drive (solid-state drive, SSD); the memory 2103 may also include a combination of the above-mentioned types of memory.

The above-mentioned processor 2102 and memory 2103 may be coupled through an interface, or may be integrated together, which is not limited in this embodiment.

The foregoing transceiver 2101 and processor 2102 can be used to execute the data processing methods in the embodiments shown in FIG. 5 and FIG. 10 , and the specific implementation methods are as follows:

The transceiver 2101 is used for receiving data frames from the first communication device. The data sequence and guard interval sequence in one DFT-S-OFDM symbol of the data frame are respectively divided into multiple sub-data sequences and multiple sub-guard interval sequences. Each sub-guard interval sequence is located at the end of the sub-data sequence, and the n+1-th sub-data sequence is adjacent to the n-th sub-guard interval sequence. The processor 2102 is configured to perform phase estimation and phase compensation on the sub-data sequence according to the arrangement order of the sub-data sequence and the sub-guard interval sequence.

In an implementation manner, the processor 2102 is further configured to acquire multiple phases corresponding to multiple sub-guard interval sequences respectively. For each sub-data sequence, the processor 2102 is further configured to perform phase estimation and phase compensation on the sub-data sequence according to the phases corresponding to the sub-guard interval sequences at the beginning and the end of the sub-data sequence.

An embodiment of the present application provides a communication system, where the communication system includes the first communication device and the second communication device described in the foregoing embodiments.

An embodiment of the present application provides a computer-readable storage medium, where a program or an instruction is stored in the computer-readable storage medium, and when the program or instruction is run on a computer, the computer can execute the data processing method in the embodiment of the present application. .

An embodiment of the present application provides a chip or a chip system, the chip or chip system includes at least one processor and an interface, the interface and the at least one processor are interconnected by a line, and the at least one processor is used to run a computer program or instruction to perform the present application The data processing method in the embodiment.

In an implementation manner, the chip or chip system described above in this application further includes at least one memory, where instructions are stored in the at least one memory. The memory may be a storage unit inside the chip, such as a register, a cache, etc., or a storage unit of the chip (eg, a read-only memory, a random access memory, etc.).

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. A computer program product includes one or more computer instructions. When the computer 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 may be a general purpose computer, a special purpose computer, a computer network, or other programmable device. Computer instructions may be stored on or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, computer, server, or data center over a wire (e.g. coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (eg infrared, wireless, microwave, etc.) means to transmit to another website site, computer, server or data center. A computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, a data center, or the like that includes an integration of one or more available media. The available media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, high-density digital video discs (DVDs)), or semiconductor media (eg, solid state disks, SSD)) etc.

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. Interchangeability, the above description has generally described the components and steps of each example in terms of function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

A data processing method, comprising:

The first communication device determines that the discrete Fourier transform extended orthogonal frequency division multiplexing DFT-S-OFDM symbol carried by the data frame, the guard interval sequence and the data sequence in one symbol are arranged in an order such that a plurality of sub-guard interval sequences are respectively located in a plurality of sub-subs. The tail of the data sequence, and the n+1 th sub-data sequence is adjacent to the n th sub-guard interval sequence; the n satisfies 0≤n≤N, and the N is a positive integer;

The first communication device performs transformation processing on the data frame, and sends the transformed data frame to the second communication device.
The method according to claim 1, wherein the guard interval sequence in one symbol includes a first sub-guard interval sequence and a second sub-guard interval sequence, the first sub-guard interval sequence and the second sub-guard interval sequence The lengths of the sequences are the same; the data sequence in one symbol includes the first sub-data sequence and the second sub-data sequence.
The method according to claim 2, wherein the arrangement order of the guard interval sequence and the data sequence in the one symbol is that a plurality of sub-guard interval sequences are respectively located at the tail of the plurality of sub-data sequences, and the n+1 th sub-data sequence Adjacent to the end of the n-th sub-guard interval sequence, including:

The first sub-data sequence is located before the second sub-data sequence, the first sub-guard interval sequence is located at the end of the first sub-data sequence, and the second sub-guard interval sequence is located in the second sub-data sequence. The tail of the data series.
The method according to claim 1 or 2, wherein the guard interval sequence in one symbol includes a first sub-guard interval sequence, a second sub-guard interval sequence and a third sub-guard interval sequence, and the first sub-guard interval sequence The length of the sequence and the third sub-guard interval sequence are consistent; the length of the second sub-guard interval sequence is the sum of the lengths of the first sub-guard interval sequence and the third sub-guard interval sequence, and in one symbol The data sequence includes a first sub-data sequence and a second sub-data sequence.
The method according to claim 4, wherein the arrangement order of the guard interval sequence and the data sequence in the one symbol is that a plurality of sub-guard interval sequences are respectively located at the tail of the plurality of sub-data sequences, and the n+1 th sub-data sequence Adjacent to the end of the n-th sub-guard interval sequence, including:

The first sub-data sequence is located before the second sub-data sequence, the first sub-guard interval sequence is located at the head of the first sub-data sequence, and the second sub-guard interval sequence is located in the first sub-data sequence. At the end of a sub-data sequence, the third sub-guard interval sequence is located at the end of the second sub-data sequence.
The method according to claim 1, wherein the determining, by the first communication device, the discrete Fourier transform extended orthogonal frequency division multiplexing DFT-S-OFDM symbols carried by the data frame, comprises:

The first communication device determines that a first guard interval sequence of symbols in the first data stream includes a first sub-guard interval sequence and a second sub-guard interval sequence, the first sub-guard interval sequence and the second sub-guard interval The length of the sequence is the same;

The first communication device determines that the second guard interval sequence of symbols in the second data stream includes a third sub-guard interval sequence and a fourth sub-guard interval sequence, the third sub-guard interval sequence and the fourth sub-guard interval The lengths of the sequences are the same; the first sub-guard interval sequence and the third sub-guard interval sequence are different guard interval sequences, and/or, the second sub-guard interval sequence and the fourth sub-guard interval sequence are different guard interval sequences;

The first communication device determines that the first data sequence of symbols in the first data stream includes a first sub-data sequence and a second sub-data sequence;

The first communication device determines that the second data sequence of symbols in the second data stream includes a third sub-data sequence and a fourth sub-data sequence.
The method according to claim 6, wherein a plurality of guard interval symbols in the sub-guard interval sequence in the first data stream are arranged in a first order; the sub-guard interval sequence in the second data stream is arranged in a first order; The multiple guard interval symbols in are arranged in a second order; the second order is an order in which the first order is cyclically shifted according to one or more guard interval symbols.
The method according to claim 6 or 7, wherein the arrangement order of the guard interval sequence and the data sequence in the one symbol is that a plurality of sub-guard interval sequences are respectively located at the tail of a plurality of sub-data sequences, and the n+1 th sub The data sequence is adjacent to the nth sub-guard interval sequence, including:

The first sub-data sequence of symbols in the first data stream is located before the second sub-data sequence, the first sub-guard interval sequence is located at the end of the first sub-data sequence, and the second sub-guard interval sequence at the end of the second sub-data sequence;

The third sub-data sequence of symbols in the second data stream is located before the fourth sub-data sequence, the third sub-guard interval sequence is located at the end of the third sub-data sequence, and the fourth sub-guard interval sequence at the end of the fourth sub-data sequence.
A communication device, characterized in that the communication device is composed of an input interface, an output interface and a logic circuit, and the input interface is used for inputting data to be processed; the logic circuit according to any one of claims 1 to 8 The method described in item 1 processes the data to be processed, and obtains the processed data; the output interface is used for outputting the processed data.
A chip, characterized in that it includes a processor and an interface;

The processor is adapted to read instructions to perform the method of any one of claims 1 to 8.