CN117749585A

CN117749585A - Data processing method and communication equipment

Info

Publication number: CN117749585A
Application number: CN202311600257.6A
Authority: CN
Inventors: 林伟; 戴胜辰; 刘鹏; 杨讯; 颜敏
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-04-02
Filing date: 2021-04-02
Publication date: 2024-03-22
Also published as: WO2022206590A1; CN115174328A; CN115174328B

Abstract

The embodiment of the application provides a data processing method and communication equipment, wherein the data processing method is realized by interaction between first communication equipment and second communication equipment. 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 locates each sub-guard interval sequence at the tail of the sub-data sequence, and the (n+1) th sub-data sequence is adjacent to the (n) th sub-guard interval sequence from head to tail. 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.

Description

Data processing method and communication equipment

This application is a divisional application, the filing number of the original application is 202110363723.8, the filing date of the original application is 2021, 4, 2, and the entire contents of the original application are incorporated herein by reference.

Technical Field

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

Background

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

Disclosure of Invention

The embodiment of the application provides a data processing method and communication equipment, and the method is favorable for more accurately estimating and compensating phases of symbols in a data frame.

In a first aspect, embodiments of the present application provide a data processing method performed by a first communication device. The first communication device is a transmitting end of a DFT-S-OFDM symbol. The first communication device divides the data sequence and the guard interval sequence in DFT-S-OFDM symbols into a plurality of sub-data sequences and a plurality of sub-guard interval sequences, respectively. The first communication device locates each sub-guard interval sequence at the tail of the sub-data sequence, and the (n+1) th sub-data sequence is adjacent to the (n) th sub-guard interval sequence from head to tail. Therefore, 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 one possible design, 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 are identical in length. The data sequence in one symbol includes a first sub data sequence and a second sub data sequence. Therefore, the first communication device equally divides the guard interval sequence in the symbol into two parts, and can effectively reduce the interval of the guard interval sequence under the condition of not increasing the overhead of the guard interval sequence, thereby being beneficial to improving 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 tail of the first sub-data sequence, and the second sub-guard interval sequence is located at the tail of the second sub-data sequence. It can be seen that each sub-guard interval sequence is located at the tail of the sub-data sequence, so that the sub-data sequence can effectively utilize the sub-guard interval sequences before and after to perform more accurate phase estimation and phase compensation.

In one 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 first sub-guard interval sequence and the third sub-guard interval sequence are identical in length. 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 consider 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 at the tail of the last sub-data sequence, respectively. The symbols are arranged according to the sequence, which is beneficial to the more accurate phase estimation and phase compensation of the first sub data sequence and the last sub data sequence by utilizing the sub protection interval sequences before and after.

In one 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 first sub-guard interval sequence and the second sub-guard interval sequence are identical in length. 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 sequence are identical in length. 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 a first data sequence of symbols in a 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. It can be seen that, in the case of multiple data streams, the first communication device equally divides the guard interval sequences of the symbols in the multiple data streams into multiple sub-guard interval sequences, respectively. This approach can effectively reduce the spacing of the guard interval sequences for each data stream.

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

In one possible design, a first sub-data sequence of symbols in the first data stream precedes a 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 tail of the sub-data sequence, so that the sub-data sequence can effectively utilize the sub-guard interval sequences before and after to perform more accurate phase estimation and phase compensation.

In a second aspect, embodiments of the present application provide a data processing method performed by a second communication device. The second communication device is a 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 the guard interval sequence in one DFT-S-OFDM symbol of the data frame are divided into a plurality of sub-data sequences and a plurality of sub-guard interval sequences, respectively. Each sub-guard interval sequence is located at the tail of the sub-data sequence, and the n+1th sub-data sequence is adjacent to the nth sub-guard interval sequence from head to tail. 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. Therefore, the second communication device can effectively utilize the sub-guard interval sequences of the sub-data sequences from the beginning to the end, and perform more accurate phase estimation and phase compensation on the sub-data sequences.

In one possible design, the second communication device obtains a plurality of phases corresponding to the plurality of sub-guard interval sequences, respectively. And aiming at each sub-data sequence, the second communication equipment carries out phase estimation and phase compensation on the sub-data sequence according to the phases corresponding to the sub-guard interval sequences of the head and tail of the sub-data sequence.

In a third aspect, embodiments of the present application provide a communication device that includes a processing unit and a transceiver unit. The processing unit is used for determining a discrete Fourier transform spread orthogonal frequency division multiplexing DFT-S-OFDM symbol carried by the data frame. The arrangement sequence of the guard interval sequence and the data sequence in one symbol is that a plurality of sub-guard interval sequences are respectively positioned at the tail parts of a plurality of sub-data sequences, and the (n+1) th sub-data sequence is adjacent to the (n) th sub-guard interval sequence from head to tail. N is more than or equal to 0 and less than or equal to N, and N is a positive integer. The processing unit is also used for carrying out transformation processing on the data frames. The transceiver unit is used for transmitting the data frame after the conversion processing to the second communication device.

In one possible design, 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 are identical in length. 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 one 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 first sub-guard interval sequence and the third sub-guard interval sequence are identical in length. 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 one possible design, the processing unit is configured to determine a discrete fourier transform spread orthogonal frequency division multiplexing, DFT-S-OFDM, symbol carried by a data frame, comprising:

the first guard interval sequence determining the 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 sequence are identical in length.

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 third sub-guard interval sequence and the fourth sub-guard interval sequence are identical in length. 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 data sequence determining symbols in the first data stream includes a first sub-data sequence and a second sub-data sequence.

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

In one possible design, the plurality of 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 sub-guard interval sequence in the second data stream are arranged in a second order. The second order is an order after the first order is cyclically shifted by one or more guard interval symbols.

In one possible design, a first sub-data sequence of symbols in the first data stream precedes a 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, embodiments of the present application provide a communication device that includes a transceiver unit and a processing unit. The transceiver unit is configured to receive a data frame from the first communication device. The data sequence and the guard interval sequence in one DFT-S-OFDM symbol of the data frame are divided into a plurality of sub-data sequences and a plurality of sub-guard interval sequences, respectively. Each sub-guard interval sequence is located at the tail of the sub-data sequence, and the n+1th sub-data sequence is adjacent to the nth sub-guard interval sequence from head to tail. The processing unit is used for carrying out phase estimation and phase compensation on the sub-data sequence according to the arrangement sequence of the sub-data sequence and the sub-guard interval sequence.

In one possible design, the processing unit is further configured to obtain a plurality of phases corresponding to the plurality of 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 phases corresponding to sub guard interval sequences of the sub data sequence, where the phases correspond to the sub guard interval sequences respectively.

In a fifth aspect, embodiments of the present application provide a communication device having a function of implementing the data processing method provided in the first aspect. The functions can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In a sixth aspect, embodiments of the present application provide a communication device having a function of implementing the data processing method provided in the second aspect. The functions can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In a seventh aspect, an embodiment of the present application provides a communication system, which 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 comprising a program or instructions which, when run on a computer, cause the computer to perform the method of the first aspect or any one of the possible implementations of the first aspect.

In a ninth aspect, embodiments of the present application provide a computer readable storage medium comprising a program or instructions which, when run on a computer, cause the computer to perform the method of the second aspect or any one of the possible implementations of the second aspect.

In a tenth aspect, embodiments of the present application provide a chip or chip system comprising at least one processor and an interface, the interface and the at least one processor being interconnected by wires, the at least one processor being adapted to execute a computer program or instructions for performing the method according to the first aspect or any one of the possible implementations of the first aspect.

In an eleventh aspect, embodiments of the present application provide a chip or chip system, the chip or chip system comprising at least one processor and an interface, the interface and the at least one processor being interconnected by a line, the at least one processor being configured to execute a computer program or instructions to perform the method according to the second aspect or any one of the possible implementations of the second aspect.

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

The chip system in the above aspect may be a System On Chip (SOC), a baseband chip, etc., where the baseband chip may include a processor, a channel encoder, a digital signal processor, a modem, an interface module, etc.

In one possible implementation, the chip or chip system described above in the present application further includes at least one memory, where the at least one memory has instructions stored therein. The memory may be a memory unit within the chip, such as a register, a cache, etc., or may be a memory unit of the chip (e.g., a read-only memory, a random access memory, etc.).

In a twelfth aspect, embodiments of the present application provide a computer program or computer program product comprising code or instructions which, when run on a computer, cause the computer to perform the method of the first aspect or any one of the possible implementations of the first aspect.

In a thirteenth aspect, embodiments of the present application provide a computer program or computer program product comprising code or instructions which, when run on a computer, cause the computer to perform the method of the second aspect or any one of the possible implementations of the second aspect.

Drawings

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

fig. 1b is a schematic diagram of a DFT-S-OFDM receiver according to an embodiment of the present application;

FIG. 2 is a diagram illustrating transmission of a data portion of a physical layer frame in the 802.11ay standard;

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

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

fig. 5 is a schematic flow chart of a data processing method according to an embodiment of the present application;

fig. 6 is a schematic diagram of a GI sequence divided into two sub-GI sequences according to an embodiment of the present application;

fig. 7 is a schematic diagram of dividing a GI sequence into four sub-GI sequences according to an embodiment of the present application;

fig. 8 is a schematic diagram of a GI sequence divided into three sub-GI sequences according to an embodiment of the present application;

fig. 9 is a schematic diagram of a GI sequence divided into five sub-GI sequences according to an embodiment of the present application;

FIG. 10 is a flowchart illustrating another data processing method according to an embodiment of the present disclosure;

fig. 11 is a schematic diagram of a first data stream and a second data stream according to an embodiment of the present application;

fig. 12 is a schematic diagram of a first data stream, a second data stream, and a third data stream according to an embodiment of the present application;

fig. 13 is a schematic diagram of another first data stream, a second data stream, and a third data stream according to an embodiment of the present application;

fig. 14 is a schematic diagram of phase correction performance when a GI sequence provided in the embodiment of the present application is divided into two sub-GI sequences;

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

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

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

fig. 18 is a schematic diagram of a communication device according to an embodiment of the present application;

fig. 19 is a schematic diagram of another communication device according to an embodiment of the present application;

fig. 20 is a schematic diagram of still another communication device according to an embodiment of the present application;

Fig. 21 is a schematic diagram of still another communication device according to an embodiment of the present application.

Detailed Description

In the embodiments of the present application, words such as "exemplary" or "such as" are used to mean serving as examples, illustrations, or descriptions. Any embodiment or design described herein as "exemplary" or "for example" 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 related concepts in a concrete fashion.

In the embodiments of the present application, the terms "first," "second," "third," "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", "a third" and a fourth "may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

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

It should be understood that, in the embodiments of the present application, the sequence number of each process does not mean that the execution sequence of each process should be determined by the function and the internal logic of each process, and should not constitute any limitation on the implementation process of the embodiments of the present application.

It should be appreciated that determining B from a does not mean determining B from a alone, but may also determine B from a and/or other information.

It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify 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 groups thereof.

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

The existing wireless local area network (wireless local area network, WLAN) standard has widely adopted orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) technology for improving 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. To increase speed, throughput, and reduce power consumption, the protocol standard 802.11ax/ad/ay has evolved. Where 802.11ax is a natural evolution of 802.11ac/n, also operating in the 2.4/5 gigahertz (GHz) frequency band. The 802.11ad/ay is used as an auxiliary technology, works in the 60GHz frequency band, has ultra-large bandwidth and no interference, so that the speed can be very high. The 802.11ad based on 60GHz can reach a data transmission rate of 8Gbps, and the peak rate of the next generation 802.11ay standard is as high as 176Gbps, so that the method can be applied to scenes such as high-definition transmission, wireless screen throwing, wireless backhaul and the like.

However, the conventional OFDM transmission signal has a very high peak-to-average ratio (peak to average power ratio, PAPR). To avoid in-band signal distortion and out-of-band leakage, the transmitter needs to have a large power. But the power amplifier of the transmitter has low utilization efficiency and has great influence on uplink transmission. Meanwhile, the single carrier transmission waveform required by the 802.11ad/ay standard has a very low PAPR, but it is difficult for the single carrier to perform frequency division multiplexing. This is a significant constraint in frequency division multiplexing for the next generation 60GHz WLAN standards for multiple users.

In summary, in order to support multi-user frequency division multiplexing and reduce the PAPR of the system, it is considered to introduce a discrete fourier transform spread orthogonal frequency division multiplexing (discrete Fourier transform spread OFDM, DFT-S-OFDM) transmission technology in the next generation 60GHz WLAN. DFT-S-OFDM transmission techniques are essentially characterized by a single carrier transmission waveform. Therefore, DFT-S-OFDM has a very low PAPR while supporting multiplexing of multiple users over frequency. Fig. 1a and 1b are transmitter and receiver structures, respectively, of DFT-S-OFDM transmission. Wherein, the DFT-S-OFDM transmitter adds a DFT module to the front end of an inverse fast fourier transform (inverse fast Fourier transform, IFFT) module of a conventional OFDM transmitter, as shown in fig. 1 a. The other modules are the same as the corresponding modules of a conventional OFDM transmitter and perform similar functions.

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

Among them, the physical layer frame structure has been specifically defined in the 802.11ay standard. GI insertion is required between symbols of the data portion of the physical layer frame to achieve phase synchronization and phase tracking. Also, the GI inserted for each data stream is different when there are multiple spatial streams, thereby avoiding deleterious beamforming effects. For example, a transmission diagram of the data portion of a physical layer frame in the 802.11ay standard is shown in fig. 2. The inserted GI sequence in FIG. 2 is Gray sequence length 64

However, the spacing between GI sequences in the 801.11ad/ay standard is too large to be effective for estimation and compensation of phase noise for higher order modulation. For example, for a high frequency system employing DFT-S-OFDM transmission, the DFT-S-OFDM transmission mode may be a GI or Cyclic Prefix (CP) mode. For example, fig. 3 is a schematic diagram of a short GI data part frame in DFT-S-OFDM mode. As can be seen, the interval between GI sequences is very large, and the receiving end cannot effectively perform phase estimation and phase compensation through the GI sequences. To reduce the interval between GI sequences, the GI length may be increased. However, increasing the GI length introduces significant overhead. Meanwhile, for the last symbol, its GI is located before the last symbol. The last symbol cannot effectively use the front and back GIs for phase estimation and phase compensation. If a symbol carrying an extra GI is added, overhead is increased.

In order to solve the above problems, embodiments of the present application provide a data processing method. The data processing method is beneficial to more accurately carrying out phase estimation and phase compensation on the data frames.

Fig. 4 is a schematic diagram of a network scenario provided in an embodiment of the present application. The network scenario is a high-frequency WLAN scenario, and includes an Access Point (AP) and a Station (STA). Wherein, the AP is a creator of the network and is a central node of the network. For example, a wireless router used in a typical home or office is an AP. Each terminal connected to a wireless network, such as a notebook computer, palm top computer (personal digital assistant, PDA) and other user devices that can be networked, may be referred to as a site. The data processing method provided by the embodiment of the application can be applied to a network scene shown in fig. 5, and processes 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 one example. The network scenario may further include a plurality of STAs, where the plurality of STAs may send data frames to or receive data frames from the AP, and the embodiment is not limited.

Fig. 5 is a flow chart of a data processing method according to an embodiment of the present application. The data processing method is implemented by an interaction between the first communication device and the second communication device. The first communication device in fig. 6 is a transmitting end of a DFT-S-OFDM symbol, and the second communication device is a 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 comprises the following steps:

501, the first communication device determines a discrete fourier transform spread orthogonal frequency division multiplexing DFT-S-OFDM symbol carried by a data frame, wherein the arrangement sequence of a guard interval sequence and a data sequence in one symbol is that a plurality of sub-guard interval sequences are respectively located at the tail parts of a plurality of sub-data sequences, and an n+1th sub-data sequence is adjacent to an nth sub-guard interval sequence from beginning to end;

502, the first communication device performs conversion processing on the data frame and sends the converted 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, the GI sequence of one symbol in each data frame to be transmitted in this embodiment is divided into a plurality of sub-guard interval (sub-GI) sequences. In one implementation, the GI sequence in one symbol is divided into two equal-length sub-GI sequences. For example, the GI sequence length shown in fig. 3 is 32. The GI sequence is divided into two sub-GI sequences of equal length, each sub-GI sequence having a length of 16, as shown in fig. 6. Meanwhile, the data sequence in one symbol is divided into a plurality of sub-data sequences. For example, the data sequence shown in fig. 3 has a length of 480. The data sequence is divided into two sub-data sequences of equal length, each sub-data sequence having a length of 240, as shown in fig. 6.

The first communication device may also set an ordering between the sub-GI sequence and the sub-data sequence. In this embodiment, the multiple sub-guard interval sequences are located at the tail of the multiple sub-data sequences, and the n+1th sub-data sequence is adjacent to the nth sub-guard interval sequence from beginning to end. For example, in one data frame of fig. 6, two sub-GI sequences are located at the tail of two sub-data sequences, respectively. That is, the first sub-GI sequence of the data frame is located at the tail of the first word data sequence, the second sub-GI sequence is adjacent to the first sub-GI sequence from the beginning to the end, and the second sub-GI is located at the tail of the second sub-data sequence, as shown in fig. 6. Specifically, for the first data frame of fig. 6, the first sub-data sequence is located at the 1 st to 240 th sub-carriers. The first sub-GI sequence is located at 240+1 to 240+16 sub-carriers. The second sub-data sequences are located at 240+16+1 through 240+16+240 sub-carriers. The second sub-GI is located at 240+16+240+1 to 240+16+240+1+16 sub-carriers. It should be noted that there is also one CP between each data frame of fig. 6, each CP being 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 length shown in fig. 3 is 32. The GI sequence is divided into four sub-GI sequences, each sub-GI sequence having a length of 8. The data sequence shown in fig. 3 is divided into four sub-data sequences of equal length, each sub-data sequence having a length of 120, as shown in fig. 7. In fig. 7, the interval between GI sequences is smaller than that of fig. 6. The data sequence is more accurate when the GI sequence is used for phase estimation.

Similarly, in one data frame of fig. 7, four sub-GI sequences are located at the tail of four sub-data sequences, respectively. That is, the first sub-GI sequence of the data frame is located at the tail of the first word data sequence, and the second sub-data sequence is adjacent to the first sub-GI sequence from the beginning to the end. The second sub-GI is positioned at the tail of the second sub-data sequence, and the third sub-data sequence is adjacent to the second sub-GI sequence from head to tail. The third sub-GI is located at the tail of the third sub-data sequence, and the fourth sub-data sequence is adjacent to the third sub-GI sequence from head to tail. 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 may divide the GI sequence into any number of sub-GI sequences. For example, the GI sequence may be divided into 2, 4, 8 sub-GI sequences, each of the sub-GI sequences being the same length. Alternatively, it is not necessary to split into 2 to power sub-GI sequences. For example, the GI sequence is divided into 6 sub-GI sequences of equal length, etc., and the present embodiment is not limited thereto. In this embodiment, the sub-GI sequences defined and divided are sequences with equal lengths, so that the reference phases can be calculated conveniently. The sub data sequences in this embodiment may be divided into sequences of equal length, or may be divided into sequences of different lengths. The specific division is determined according to the length of the data sequence. That is, the specific insertion mode of each sub-GI sequence also maintains the equal interval between each sub-data sequence as much as possible.

In yet another implementation, since the first sub-data sequence and the last sub-data sequence of a data frame are more severely affected by phase noise, in order to consider 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 with equal length. And the two divided sub-GI sequences are respectively positioned at the head part of the first sub-data sequence and the tail part of the last sub-data sequence.

For example, in the sub-GI sequence shown in fig. 6, the sub-GI sequence originally located at the tail of the last sub-data sequence is further divided into two sub-GI sequences with length of 8. And, the two sub-GI sequences with length of 8 are respectively 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 tail of the last sub-data sequence is further divided into two sub-GI sequences with length of 4. And, the two sub-GI sequences with length of 4 are respectively 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 the sub-GI sequence division manner and the arrangement manner of the sub-GI sequence and the sub-data sequence as shown in fig. 8 or fig. 9 are adopted, which is beneficial to more accurate phase estimation and phase compensation of the first sub-data sequence and the last sub-data sequence.

After determining the arrangement sequence between the sub-GI sequence and the sub-data sequence, the first communication device performs a transformation process 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 in accordance with the DFT-S-OFDM transmission mode, and transmits the DFT and IFFT-operated data frame 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. 1 a. The specific implementation manner may refer to the implementation manner of the corresponding module in the existing DFT-S-OFDM transmitter, and will not be described herein.

The second communication device receives the transformed data frame sent by the first communication device, and performs inverse transformation processing on the data frame first. For example, taking the CP-based DFT-S-OFDM system as an example, the receiving end of the data frame (i.e., the second communication device) is shown in fig. 1 b. The second communication device first removes the CP and then performs FFT transformation and frequency domain equalization on the data frame. And finally, converting the signals back to a time domain through IFFT to obtain a sub-data sequence and a sub-GI sequence in each symbol.

The second communication device performs phase estimation and phase compensation on the data symbols in each symbol according to the arrangement sequence of the sub-data sequences and the sub-GI sequences in each symbol. It should be noted that the first sub-data sequence and the remaining sub-data sequences of each symbol need to be processed separately due to the CP interval between the symbols. For example, in a DFT-S-OFDM system, the receiver first calculates the phase using a known sub-GI reference sequenceAnd->These two phases correspond to the sub-GI sequences before and after the non-first sub-data sequence, respectively (e.g., 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 mth data symbol in the non-first sub-data sequence, the calculation formula of the phase to be compensated for by the data symbol m is shown in formula 1.

Wherein, delta phi _m Represents the phase that the mth data symbol needs to compensate for, phi ₁ And phi ₂ And the phases corresponding to the first sub-GI sequence and the last sub-GI sequence of the sub-data sequence are respectively indicated. According to formula 1, the second communication device calculates the phase to be compensated of the non-first sub-data sequence in each symbol. For example, a non-first sub-data sequence includes 100 data symbols. The phase to be compensated for the first of these 100 data symbols is according to equation 1: Similarly, the phases to be compensated for the remaining 99 data symbols, respectively, are sequentially calculated, thereby performing phase compensation for the entire sub data sequence.

The effect of CP spacing also needs to be considered for the first sub-data sequence in each symbol. 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 formula 2.

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

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

Where dft_size represents an influence parameter of DFT transform on the CP length, and ifft_size represents an influence parameter of IFFT transform on the CP length. After W-1+len (CP x) phase compensation values are obtained by calculation according to formulas 2 and 3, the second communication device performs phase compensation on the first sub-data sequence by taking the W phase compensation values. That is, 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. Equation 4 further defines the phase compensation value (W total phase compensation values) as compared to equation 3.

It can be seen that by means of the above equations 1-4, the second communication device can perform phase estimation and phase compensation on the sub-data sequences.

The embodiment of the application provides a data processing method, which is executed by first communication equipment. 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 locates each sub-guard interval sequence at the tail of the sub-data sequence, and the (n+1) th sub-data sequence is adjacent to the (n) th sub-guard interval sequence from head to tail. It can be seen that the sub-data sequence can effectively utilize the sub-guard interval sequences before and after to perform more accurate phase estimation and phase compensation.

The embodiment of the application provides a data processing method which is realized 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 a plurality of sub-data sequences and a plurality of sub-guard interval sequences respectively. The first communication device locates each sub-guard interval sequence at the tail of the sub-data sequence, and the (n+1) th sub-data sequence is adjacent to the (n) th sub-guard interval sequence from head to tail. 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 flowchart of another data processing method according to an embodiment of the present application. The data processing method is implemented by an interaction between the first communication device and the second communication device. The first communication device in fig. 6 is a transmitting end of a DFT-S-OFDM symbol, and the second communication device is a receiving end of the DFT-S-OFDM symbol. In contrast to 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 the spatially detrimental beamforming effects of multiple data streams can be avoided. The data processing method comprises the following steps:

1001, 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, and the first data sequence of symbols in the first data stream includes a first sub-data sequence and a second sub-data sequence;

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

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

the first communication device performs a transform process on the first data stream and performs a transform process on the second data stream 1004;

1005, the first communication device transmits the first data stream and the second data stream after the conversion processing to the second communication device; correspondingly, the second communication device receives a first data stream and a 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 sequence of the sub-data sequence and the sub-guard interval sequence in the first data stream; and according to the arrangement sequence of the sub-data sequences and the sub-guard interval sequences in the second data stream, performing phase estimation and phase compensation 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 transmitted simultaneously in multiple data streams, a spatially deleterious beamforming effect may result. To avoid this, the sub-GI sequences in the respective data streams are transformed in the present embodiment so that the sequences in the multiple data streams are different time domain signal sequences.

Two data streams are described in detail below as examples. 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 are different guard interval sequences. That is, the sub-GI sequence at the same time domain position of the first data stream and the second data stream transmitted simultaneously needs 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, each sub-GI sequence having a length of 16, as shown in fig. 11. Wherein the first sub-GI sequence (shown as shaded boxes in fig. 11) and the second sub-GI sequence (shown as solid-colored boxes 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 (e.g., the shaded square in fig. 11 is located after the solid square) is the position order of the two sub-GI sequences shifted in the same time domain in the first data stream, as shown in fig. 11. It can be seen that the sub-GI sequences between different data streams can be shifted, avoiding identical sequences being in the same time-domain interval. In which fig. 11 shows a simple pattern of two data streams. That is, one character of each data stream contains two sub-GI sequences, and two sub-GI exchange positions of symbols at the same position of different data streams are required. In this case, spatially detrimental beamforming effects between the first data stream and the second data stream may be avoided.

The multiple sub-guard interval sequences of the symbols in the first data stream or the second data stream are respectively located at the tail parts of the multiple sub-guard interval sequences, and the n+1th sub-data sequence in the first data stream or the second data stream is adjacent to the nth sub-guard interval sequence from head to tail. The arrangement of the sub-data sequences and sub-GI sequences in the symbols of the first data stream or the second data stream may be described with reference to the embodiments of fig. 5 and 6. For example, the first sub-GI sequence is located at the tail of the first sub-data sequence and the second sub-GI sequence is located at the tail of the second sub-data sequence in the symbols of the first data stream in fig. 11. The first sub-GI sequence is located at the tail of the first sub-data sequence in the symbols of the second data stream, and the second sub-GI sequence is located at the tail of the second sub-data sequence. By adopting the sorting mode, the sub-data sequences in each symbol are favorable for more accurate phase estimation and phase compensation.

After determining the arrangement sequence of the sub-data sequences and sub-GI sequences of the symbols in the first data stream and the second data stream, the first communication device performs a transform process on the first data stream and performs a transform process 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 in accordance with the DFT-S-OFDM transmission mode, and transmits the DFT and IFFT operated first data stream and second data stream to the second communication device. 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. 1 a. The specific implementation manner may refer to the implementation manner of the corresponding module in the existing DFT-S-OFDM transmitter, and will not be described herein.

The first communication device sends the first data stream and the second data stream after the conversion processing 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 equipment carries out phase estimation and phase compensation on the sub-data sequences in the first data stream according to the arrangement sequence of the sub-data sequences and the sub-guard interval sequences in the first data stream; and according to the arrangement sequence of the sub-data sequences and the sub-guard interval sequences in the second data stream, performing phase estimation and phase compensation on the sub-data sequences in the second data stream. For specific implementation, reference may be made to the description of corresponding steps in the embodiment of fig. 5, which is not repeated here.

In one example, three or more data streams may be transmitted simultaneously between the first communication device and the second communication device. The interaction flow between the first communication device and the second communication device is similar to that in the embodiment of fig. 10, and will not be described here again. The GI sequences of the different data streams are described in detail below using three data streams as an example. The description is also given by taking the example that the GI sequence of one symbol in the data stream is divided into two sub-GI sequences with equal length, and the length of each sub-GI sequence is 16. In order to avoid a spatially harmful beamforming effect caused when the same time domain signal sequence is transmitted by multiple data streams simultaneously, guard interval characters in the sub-GI sequences in the multiple data streams respectively in the embodiment can be cyclically shifted, so that sub-GI sequences of different data streams in the same time domain position are different. Wherein the GI sequence in one data stream comprises a plurality of GI symbols.

In one implementation, the first communication device first orders the GI symbols of the GI sequences in the first, second, and third data streams, and then divides the GI sequences and the data sequences. The plurality of GI symbols of the GI sequence in the first data stream are arranged in a first order, the plurality of GI symbols of the GI sequence in the second data stream are arranged in a second order, and the plurality of GI symbols of the GI sequence in the third data stream are arranged in a third order. The second order is an order after the first order circularly shifts the plurality of GI symbols according to the first cyclic shift coefficient. The third order is an order in which the first order cyclically shifts the plurality of GI symbols by the second cyclic shift coefficient. The first cyclic shift coefficient is different from the second cyclic shift coefficient. The first communication device then re-divides the cyclically shifted GI sequence into sub-GI sequences, e.g., the first communication device divides the GI sequences in the first, second and third data streams into two sub-GI sequences, respectively.

For example, fig. 12 is a schematic diagram of three data flows provided in 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 a second order. The second order is to cyclically shift the last GI symbol of the GI sequence in the first data stream to the first GI symbol position of the GI sequence, as shown by 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 order is to cyclically shift the last two GI symbols of the GI sequence in the first data stream to the first and second GI symbol positions of the GI sequence, as shown by the GI sequence of the third data stream in fig. 12. According to the above-mentioned sequence of 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 avoid that the same sequences are in the same time domain interval. The second data stream and the third data stream may be regarded as cyclically shifting the GI symbol in the GI sequence by the first data stream according to a cyclic shift coefficient, but the cyclic shift coefficients of the second data stream and the third data stream are different. After determining the sequence 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 the data sequences of the symbols in each data stream into a plurality of sub-GI sequences and sub-data sequences, respectively. 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, the first communication device divides the GI sequence and the data sequence in the first data stream, the second data stream, and the third data stream, and then performs cyclic shift on each sub-GI sequence corresponding to each data stream. The plurality of GI symbols of the sub-GI sequence in the first data stream are arranged according to a first order, the plurality of GI symbols of the sub-GI sequence in the second data stream are arranged according to a second order, and the plurality of GI symbols of the sub-GI sequence in the third data stream are arranged according to a third order. The second sequence and the third sequence are respectively sequences after the first sequence is circularly shifted according to one or more guard interval symbols, and the second sequence and the third sequence are different sequences.

For example, fig. 13 is a schematic diagram of another three data flows provided in an embodiment of the present application. In the first data stream of fig. 13, the first symbol comprises two sub-data sequences of length 240 and two sub-GI sequences of length 16. The sequence of the last two GI symbols of each sub-GI sequence in the symbol is shown in fig. 12. The GI symbols of each sub-GI sequence in the second data stream are arranged in a second order. The second order is to cyclically shift the last GI symbol of a sub-GI sequence in the first data stream to the first GI symbol position of the sub-GI sequence, as shown in the sub-GI sequence of the second data stream in fig. 13. The GI symbols of each sub-GI sequence in the third data stream are arranged in a third order. The third order is to cyclically shift the last two GI symbols of one sub-GI sequence in the first data stream to the first and second GI symbol positions of the sub-GI sequence, as shown in the sub-GI sequence of the third data stream in fig. 13. According to the above-mentioned sequence of 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 avoid that the same sequences are in the same time domain interval. The second data stream and the third data stream may be regarded as cyclically shifting the GI symbol in the GI sequence by the first data stream according to a cyclic shift coefficient, but the cyclic shift coefficients of the second data stream and the third data stream are different. For the same data stream, the cyclic shift coefficients of the GI symbols in different sub-GI sequences of the same data stream are the same. For example, the cyclic shift coefficients of the GI symbols in each sub-GI sequence in the second data stream are the same relative to the sub-GI sequence at the same location in the first data stream, as shown in fig. 13.

Wherein, when the first communication device and the second communication device simultaneously transmit three or more data streams, the arrangement order of the GI symbols of the GI sequence or the arrangement order of the GI symbols of the sub-GI sequence in each data stream is similar to the arrangement order in fig. 12 or fig. 13. The first communication device firstly sorts the GI symbols of the GI sequences in the first data stream, the second data stream and the nth data stream (n is a positive integer more than 3), and then divides the GI sequences and the data sequences; or the first communication device divides the GI sequence and the data sequence from the first data stream to the second data stream to the nth data stream, and then circularly shifts each sub-GI sequence corresponding to each data stream. The detailed description of the embodiments with reference to fig. 12 and 13 is omitted herein.

The embodiment of the application provides another data processing method, which is realized by interaction between a first communication device and a second communication device. When the first communication device sends a plurality of data streams to the second communication device at the same time, the symbol of each data stream has different GI sequences at the same time domain position, so that the harmful beam forming effect can be avoided. The sub-guard interval sequences in the symbols of the multiple data streams are respectively located at the tail parts of the sub-data sequences, and the (n+1) th sub-data sequence is adjacent to the (n) th sub-guard interval sequence from head to tail. 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 in the embodiment of the present application in the embodiment of fig. 5 to 13, the phase correction performance when the second communication device adopts the data processing method is described below with reference to fig. 14 to 17, respectively. Fig. 14 to 17 show constellations in different modulation schemes (16 QAM and 64 QAM).

Fig. 14 is a phase correction performance diagram when one GI sequence is divided into two sub-GI sequences. The first sub-graph in fig. 14 is a constellation diagram after phase correction when the data processing method provided by the embodiment of the present application is adopted in the 16QAM modulation mode, and the second sub-graph is a constellation diagram before phase correction in the 16QAM modulation mode. It can be seen that the sub-graph (one) after phase correction has a smaller phase offset in the constellation than the sub-graph (two) before phase correction. The subplot (III) in FIG. 14 is a constellation diagram after phase correction when the data processing method provided by the embodiment of the application is adopted in a 64QAM modulation mode, and the subplot (IV) is a constellation diagram before phase correction in a 64QAM modulation mode. It can be seen that the sub-graph (three) after phase correction has a smaller phase offset in the constellation than the sub-graph (four) before phase correction.

Similarly, fig. 15 is a phase correction performance diagram when one GI sequence is divided into four sub-GI sequences. Fig. 16 is a phase correction performance diagram when one GI sequence is divided into eight sub-GI sequences. Fig. 17 is a schematic diagram of phase correction performance when one GI sequence is divided into sixteen sub-GI sequences. For the description of each sub-figure in fig. 15 to 17, reference may be made to the description of each sub-figure in fig. 14, and no further description is given here. According to the phase corrected constellation of fig. 14 to 17, the phase correction performance is higher when one GI sequence is divided into more sub-GI sequences. I.e. one GI sequence is divided into more sub-GI sequences, and the phase offset in the constellation after phase correction is smaller. For example, the sub-graph (iii) in fig. 17 is a constellation diagram after phase correction when the data processing method provided in the embodiment of the present application is adopted in the 64QAM modulation mode. It can be seen that plot (three) of fig. 17 is less phase shifted in the constellation and better phase correction performance than plot (three) of fig. 14.

The data processing method of the embodiment of the present application is described in detail above in connection with fig. 4 to 17. The communication device of the embodiment of the present application is described in detail below with reference to fig. 18 to 21. It should be appreciated that the communication device shown in fig. 18-21 is capable of implementing the steps of one or more of the method flows shown in fig. 5 and 10. To avoid repetition, details are not repeated 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 embodiments shown in fig. 5 and 10 described above. The communication device comprises a processing unit 1801 and a transceiver unit 1802. The processing unit 1801 is configured to determine a discrete fourier transform spread orthogonal frequency division multiplexing DFT-S-OFDM symbol carried by the data frame. The arrangement sequence of the guard interval sequence and the data sequence in one symbol is that a plurality of sub-guard interval sequences are respectively positioned at the tail parts of a plurality of sub-data sequences, and the (n+1) th sub-data sequence is adjacent to the (n) th sub-guard interval sequence from head to tail. Wherein N satisfies that N is more than or equal to 0 and less than or equal to N, and N is a positive integer. The processing unit 1801 is also configured to perform transform processing on the data frame. The transceiver 1802 is configured to transmit the data frame after the conversion processing to the second communication device.

In one implementation, the guard interval sequence in one symbol includes a first sub-guard interval sequence and a second sub-guard interval sequence, and the first sub-guard interval sequence and the second sub-guard interval sequence are identical in length. 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 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 one implementation, 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 first sub-guard interval sequence and the third sub-guard interval sequence are identical in length. 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 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, the second sub-guard interval sequence is located at the tail of the first sub-data sequence, and the third sub-guard interval sequence is located at the tail of the second sub-data sequence.

In one implementation, the processing unit 1801 is configured to determine a discrete fourier transform spread orthogonal frequency division multiplexing DFT-S-OFDM symbol carried by a data frame, and includes:

determining that a first guard interval sequence of a symbol in a first data stream comprises a first sub-guard interval sequence and a second sub-guard interval sequence, wherein the lengths of the first sub-guard interval sequence and the second sub-guard interval sequence are consistent;

determining that a second guard interval sequence of symbols in a 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 sequence are consistent in length; 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;

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

In one implementation, a plurality of guard interval symbols in a sequence of sub-guard intervals in a 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 order is an order after the first order is cyclically shifted by one or more guard interval symbols.

In one implementation, a first sub-data sequence of a symbol in a first data stream precedes a second sub-data sequence, a first sub-guard interval sequence is located at the end of the first sub-data sequence, and a second sub-guard interval sequence is located at the end of the second sub-data sequence. The third sub-data sequence of the symbol 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 one implementation, the relevant functions implemented by the various elements in FIG. 18 may be implemented by a transceiver and a processor. Fig. 19 is a schematic diagram of another communication device according to an embodiment of the present application. The communication device may be a device (e.g. a chip) capable of performing the data processing method in the embodiments shown in fig. 5 and 10. The communication device may include a transceiver 1901, at least one processor 1902, and a memory 1903. The transceiver 1901, processor 1902, and memory 1903 may be connected to each other via one or more communication buses, as well as by other means.

Wherein the transceiver 1901 may be used to transmit data or receive data. It is to be appreciated that the transceiver 1901 is a generic term and can include both a receiver and a transmitter.

The processor 1902 may be configured to process data of a server, among other things. The processor 1902 may include one or more processors, for example the processor 1902 may be one or more central processing units (central processing unit, CPU), network processors (network processor, NP), 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.

The memory 1903 is used for storing program codes and the like. The memory 1903 may include volatile memory (RAM), such as random access memory (random access memory); the memory 1903 may also include a nonvolatile memory (non-volatile memory), such as a read-only memory (ROM), a flash memory (flash memory), a hard disk (HDD) or a Solid State Drive (SSD); the memory 1903 may also include a combination of the above types of memories.

The processor 1902 and the 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 may be used to perform the data processing method in the embodiment shown in fig. 5 and 10, and the specific implementation manner is as follows:

The processor 1902 determines that a discrete fourier transform spread orthogonal frequency division multiplexing DFT-S-OFDM symbol carried by a data frame, wherein an arrangement sequence of a guard interval sequence and a data sequence in one symbol is that a plurality of sub-guard interval sequences are respectively located at the tail parts of a plurality of sub-data sequences, and an n+1th sub-data sequence is adjacent to an nth sub-guard interval sequence from head to tail; n is more than or equal to 0 and less than or equal to N, wherein N is a positive integer;

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

the transceiver 1901 is configured to transmit the data frame after the conversion processing to the second communication device.

In one implementation, 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 are identical in length. 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 tail of the first sub-data sequence, and the second sub-guard interval sequence is located at the tail 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 one implementation, the processor 1902 is configured to determine a discrete fourier transform spread orthogonal frequency division multiplexing, DFT-S-OFDM, symbol carried by a data frame, comprising:

In one implementation, a plurality of guard interval symbols in a sequence of guard intervals in a first data stream are arranged in a first order. The plurality of guard interval symbols of the sub-guard interval sequence in the second data stream are arranged in a second order. The second order is an order after the first order is cyclically shifted by one or more guard interval symbols.

In one implementation, a first sub-data sequence of symbols in a first data stream precedes a 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 according to 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 embodiments shown in fig. 5 and 10 described above. The communication device includes a transceiver unit 2001 and a processing unit 2002. Wherein the transceiver unit 2001 is for receiving a data frame from a first communication device. The data sequence and the guard interval sequence in one DFT-S-OFDM symbol of the data frame are divided into a plurality of sub-data sequences and a plurality of sub-guard interval sequences, respectively. Each sub-guard interval sequence is located at the tail of the sub-data sequence, and the n+1th sub-data sequence is adjacent to the nth sub-guard interval sequence from head to tail. 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 one implementation, the processing unit 2002 is further configured to obtain a plurality of phases corresponding to the plurality of 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 phases corresponding to sub-guard interval sequences of the sub-data sequence, which are respectively from the beginning to the end.

In one implementation, the relevant functions implemented by the various elements in FIG. 20 may be implemented by a transceiver and a processor. Fig. 21 is a schematic diagram of still another communication device according to an embodiment of the present application. The communication device may be a device (e.g. a chip) capable of performing the data processing method in the embodiments shown in fig. 5 and 10. The communication device may include a transceiver 2101, at least one processor 2102, and a memory 2103. The transceiver 2101, processor 2102 and memory 2103 may be connected to each other via one or more communication buses, or may be connected in other ways.

Wherein the transceiver 2101 may be used to transmit data or to receive data. It is to be appreciated that the transceiver 2101 is a generic term and can include both a receiver and a transmitter.

Wherein the processor 2102 may be configured to process data of a server. The processor 2102 may include one or more processors, for example the processor 2102 may be one or more central processing units (central processing unit, CPU), network processors (network processor, NP), 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.

The memory 2103 is used for storing program codes and the like therein. The memory 2103 may include volatile memory (RAM), such as random access memory (random access memory); the memory 2103 may also include a nonvolatile memory (non-volatile memory), such as a read-only memory (ROM), a flash memory (flash memory), a hard disk (HDD) or a Solid State Drive (SSD); the memory 2103 may also include a combination of the above types of memory.

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

The transceiver 2101 and the processor 2102 described above may be used to perform the data processing method in the embodiment shown in fig. 5 and 10, and the specific implementation manner is as follows:

the transceiver 2101 is used to receive data frames from a first communication device. The data sequence and the guard interval sequence in one DFT-S-OFDM symbol of the data frame are divided into a plurality of sub-data sequences and a plurality of sub-guard interval sequences, respectively. Each sub-guard interval sequence is located at the tail of the sub-data sequence, and the n+1th sub-data sequence is adjacent to the nth sub-guard interval sequence from head to tail. 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 one implementation, the processor 2102 is further configured to obtain a plurality of phases corresponding to the plurality of 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 phases corresponding to sub-guard interval sequences of the sub-data sequence, which are respectively from the beginning to the end.

The embodiment of the application provides a communication system, which comprises the first communication device and the second communication device.

The present embodiment provides a computer-readable storage medium storing a program or instructions that, when executed on a computer, cause the computer to perform the data processing method in the embodiment of the present application.

The embodiment of the application provides a chip or a chip system, which comprises at least one processor and an interface, wherein 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 instructions to perform a data processing method in the embodiment of the application.

In one implementation, the chip or chip system described above in this application further includes at least one memory having instructions stored therein. The memory may be a memory unit within the chip, such as a register, a cache, etc., or may be a memory unit of the chip (e.g., a read-only memory, a random access memory, etc.).

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another, for example, by wired (e.g., coaxial cable, fiber optic, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means from one website, computer, server, or data center. Computer readable storage media can be any available media that can be accessed by a computer or data storage devices, such as servers, data centers, etc., that contain an integration of one or more available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), or the like.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps described in connection with the embodiments disclosed herein may be embodied in electronic hardware, in computer software, or in a combination of the two, and that the elements and steps of the examples have been generally described in terms of function in the foregoing description to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of data processing, comprising:

the second communication device receives the data frame from the first communication device; the data sequence and the guard interval sequence in one discrete Fourier transform spread orthogonal frequency division multiplexing DFT-S-OFDM symbol of the data frame are respectively divided into a plurality of sub-data sequences and a plurality of sub-guard interval sequences, each sub-guard interval sequence is positioned at the tail part of the sub-data sequence, and the (n+1) th sub-data sequence is adjacent to the (n) th sub-guard interval sequence from beginning to end;

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

2. The method of claim 1, wherein 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, comprising:

the second communication device obtains a plurality of phases respectively corresponding to the plurality of sub-guard interval sequences;

and the second communication equipment carries out phase estimation and phase compensation on the sub-data sequences according to the phases corresponding to the sub-guard interval sequences of which the head and the tail are respectively in the plurality of sub-data sequences.

3. The method of claim 2, wherein the phase compensation value of the data symbols in the sub-data sequence is determined based on the phase corresponding to the first and the last two sub-guard interval sequences of the sub-data sequence, the number of the data symbols of the sub-data sequence, and the index value of the data symbols, respectively, and the sub-data sequence is any one of the data sequences except for the first sub-data sequence.

4. The method of claim 2, wherein the phase compensation value of the data symbols in the sub-data sequence is determined based on the phase respectively corresponding to the first and last two sub-guard interval sequences of the sub-data sequence, the number of data symbols of the sub-data sequence, the index value of the data symbols, and the equivalent length of the cyclic prefix after the discrete fourier transform and the inverse fast fourier transform, the sub-data sequence being the first sub-data sequence in the data sequence.

5. The method of claim 1, wherein after the second communication device receives the data frame from the first communication device, the method further comprises:

the second communication equipment deletes the cyclic prefix of the data frame and carries out fast Fourier transform and frequency domain equalization processing on the data frame;

and the second communication equipment performs inverse fast Fourier transform on the data subjected to the fast Fourier transform and the frequency domain equalization processing to obtain a sub-data sequence and a sub-guard interval sequence in each symbol.

6. A method of data processing, comprising:

the first communication device determining a first guard interval sequence of symbols in a first data stream and a second guard interval sequence of symbols in a second data stream; the first guard interval sequence comprises a first sub-guard interval sequence and a second sub-guard interval sequence; the second guard interval sequence comprises a third sub-guard interval sequence and a fourth sub-guard interval sequence;

The first communication device determines that a plurality of sub-guard interval sequences of symbols in a first data stream are respectively positioned at the tail parts of the plurality of sub-data sequences, and an n+1th sub-data sequence in the first data stream is adjacent to the nth sub-guard interval sequence from head to tail;

the first communication device determines that a plurality of sub-guard interval sequences of symbols in a second data stream are respectively positioned at the tail parts of the plurality of sub-data sequences, and an n+1th sub-data sequence in the second data stream is adjacent to the nth sub-guard interval sequence from head to tail;

the first communication device performs conversion processing on the first data stream and the second data stream, and sends the converted first data stream and second data stream to the second communication device.

7. The method of claim 6, wherein the first sub-guard interval sequence and the second sub-guard interval sequence are identical in length; the length of the third sub-protection interval sequence is consistent with that of the fourth sub-protection interval sequence;

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.

8. The method of claim 6, wherein a plurality of guard interval symbols in a sequence of sub-guard intervals 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 after the first sequence is circularly shifted according to one or more guard interval symbols.

9. The method of claim 6 or 7, wherein a first sub-data sequence of symbols in the first data stream precedes a 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 the symbol in the second data stream is located before the fourth sub-data sequence, the third sub-guard interval sequence is located at the tail of the third sub-data sequence, and the fourth sub-guard interval sequence is located at the tail of the fourth sub-data sequence.

10. The communication equipment is characterized by comprising an input interface, an output interface and a logic circuit, wherein the input interface is used for inputting data to be processed; the logic circuit processes data to be processed according to the method of any one of claims 1 to 5 or 6 to 9 to obtain processed data; the output interface is used for outputting the processed data.

11. A computer readable storage medium, characterized in that the computer readable storage medium comprises a program or instructions which, when run on a computer, cause the computer to perform the method of any of claims 1 to 5 or 6 to 9.

12. A chip, comprising a processor and an interface;

the processor being configured to read instructions to perform the method of any one of claims 1 to 5 or 6 to 9.

13. A computer program product comprising code or instructions which, when run on a computer, cause the computer to perform the method of any one of claims 1 to 5 or 6 to 9.