CN115632739A - Wireless communication frame generation method and device, electronic equipment and storage medium - Google Patents

Wireless communication frame generation method and device, electronic equipment and storage medium Download PDF

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Publication number
CN115632739A
CN115632739A CN202211236498.2A CN202211236498A CN115632739A CN 115632739 A CN115632739 A CN 115632739A CN 202211236498 A CN202211236498 A CN 202211236498A CN 115632739 A CN115632739 A CN 115632739A
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sequence
training sequence
signaling
data
wireless communication
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雷杰
李诚新
吴彦奇
戴延中
王桢
张春鸣
吴佳丽
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Beijing Eswin Computing Technology Co Ltd
Guangzhou Quanshengwei Information Technology Co Ltd
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Beijing Eswin Computing Technology Co Ltd
Guangzhou Quanshengwei Information Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0007—Code type
    • H04J13/0055—ZCZ [zero correlation zone]
    • H04J13/0059—CAZAC [constant-amplitude and zero auto-correlation]
    • H04J13/0062—Zadoff-Chu
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H04L27/2613—Structure of the reference signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2614—Peak power aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2689—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation
    • H04L27/2692—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation with preamble design, i.e. with negotiation of the synchronisation sequence with transmitter or sequence linked to the algorithm used at the receiver

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The application provides a method and a device for generating a wireless communication frame, an electronic device and a storage medium, and relates to the technical field of wireless communication, wherein the method comprises the following steps: constructing a leading training sequence, wherein the autocorrelation of the leading training sequence is greater than the first autocorrelation, and the peak value average power ratio of the leading training sequence is lower than the first peak value average power ratio; constructing a signaling data sequence, the signaling data sequence comprising: a signaling symbol and a data symbol, the data symbol being located after the signaling symbol; and splicing the preamble training sequence and the signaling data sequence according to the sequence to generate a wireless communication frame. The wireless communication frame of the application can enable the wireless communication system to work under the condition of lower signal to noise ratio, and can carry out point-to-point communication at a longer distance in an area lacking cellular network coverage.

Description

Wireless communication frame generation method and device, electronic equipment and storage medium
Technical Field
The present application relates to the field of wireless communication technologies, and in particular, to a method and an apparatus for generating a wireless communication frame, an electronic device, and a storage medium.
Background
Currently, a terminal device (e.g., a smart phone) generally adopts a cellular network technology to ensure wireless coverage of communication, and also supports a WiFi technology to implement high-throughput and low-cost wireless communication within a wireless hotspot coverage range. The cellular network technology and the WiFi technology are good and bad respectively, supplement each other, and can cover most application scenes in life.
However, in an area without network coverage, the cellular network technology cannot work, and the WIFI technology has a limited communication distance although it can perform peer-to-peer communication.
Therefore, the prior art has the following defects: due to the defect of small coverage (e.g., typical coverage radius is about 250 m outdoors in 802.11 n), the terminal device cannot directly perform point-to-point communication at a longer distance in an area lacking cellular network coverage.
Disclosure of Invention
The application provides a method and a device for generating a wireless communication frame, electronic equipment and a storage medium, which are used for solving the defect that terminal equipment cannot directly perform point-to-point communication at a longer distance in an area which lacks cellular network coverage in the prior art.
The application provides a method for generating a wireless communication frame, which comprises the following steps:
constructing a leading training sequence, wherein the autocorrelation of the leading training sequence is greater than the first autocorrelation, and the peak value average power ratio of the leading training sequence is lower than the first peak value average power ratio;
constructing a signaling data sequence, the signaling data sequence comprising: a signaling symbol and a data symbol, the data symbol being located after the signaling symbol;
and splicing the preamble training sequence and the signaling data sequence according to the sequence to generate a wireless communication frame.
According to a method for generating a wireless communication frame provided by the present application, the constructing a preamble training sequence includes:
splicing the cyclic prefix, the first ZC sequences of the first number and the second ZC sequences according to the sequence to construct a leading training sequence;
the first ZC sequences of the first number are the same, the phase difference between the second ZC sequences and the first ZC sequences is pi, and the cyclic prefix comprises the last sampling points of the first ZC sequences of the preset number.
According to a method for generating a wireless communication frame provided by the application, the constructing of the signaling data sequence comprises:
and splicing the second number of the signaling symbols and the third number of the data symbols according to the sequence to construct a signaling data sequence.
According to the generation method of the wireless communication frame provided by the application, the constructing of the signaling data sequence comprises the following steps:
splicing the second number of the signaling symbols and the third number of the data symbols according to the sequence, and inserting an intermediate training sequence into every fourth number of the data symbols to construct a signaling data sequence;
wherein the autocorrelation of the intermediate training sequence is greater than a second autocorrelation, and the peak-to-average power ratio of the intermediate training sequence is lower than a second peak-to-average power ratio; the fourth number is inversely related to the channel variation speed.
According to the generation method of the wireless communication frame provided by the application, the intermediate training sequence is constructed by the following steps:
splicing the cyclic prefix and the fifth number of first ZC sequences according to the sequence to construct an intermediate training sequence;
wherein the cyclic prefix includes a last preset number of sample points in the first ZC sequence.
According to the method for generating the wireless communication frame, the length of the preamble training sequence and the length of the middle training sequence are both in negative correlation with the signal-to-noise ratio.
According to the method for generating a wireless communication frame provided by the present application, the subcarrier mapping structure of the signaling symbol or the data symbol includes: a sixth number of data subcarriers and a seventh number of pilot subcarriers;
the power factors of the data subcarriers and the pilot subcarriers satisfy the following conditions:
a ratio of a sum between a first product and a second product to a sum between the sixth number and the seventh number is 1, the first product being a product between a square of a power factor of the data subcarriers and the sixth number, the second product being a product between a square of a power factor of the pilot subcarriers and the seventh number.
The present application also provides a device for generating a wireless communication frame, including:
a first constructing module, configured to construct a preamble training sequence, where an autocorrelation of the preamble training sequence is greater than a first autocorrelation, and a peak-to-average power ratio of the preamble training sequence is lower than a first peak-to-average power ratio;
a second constructing module, configured to construct a signaling data sequence, where the signaling data sequence includes: a signaling symbol and a data symbol, the data symbol being located after the signaling symbol;
and the generating module is used for splicing the preamble training sequence and the signaling data sequence according to the sequence to generate a wireless communication frame.
The present application further provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the steps of the method for generating a wireless communication frame according to any of the above-mentioned embodiments are implemented.
The present application also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, carries out the steps of the method of generating a wireless communication frame as described in any of the above.
The method, the device, the electronic equipment and the storage medium for generating the wireless communication frame provided by the application comprise the steps of firstly, constructing a preamble training sequence, wherein the autocorrelation of the preamble training sequence is greater than a first autocorrelation, and the peak value average power ratio of the preamble training sequence is lower than a first peak value average power ratio; then, a signaling data sequence is constructed, and the signaling data sequence comprises: a signaling symbol and a data symbol, the data symbol being located after the signaling symbol; and finally, splicing the leader training sequence and the signaling data sequence according to the sequence to generate a wireless communication frame, wherein the autocorrelation of the leader training sequence is greater than the first autocorrelation, and the peak average power ratio of the leader training sequence is lower than the first peak average power ratio, namely, the leader training sequence has stronger autocorrelation and lower peak average power, so that the wireless communication frame can enable a wireless communication system to work under lower signal-to-noise ratio and can carry out farther-distance point-to-point communication in an area which is not covered by a cellular network.
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In order to more clearly illustrate the technical solutions in the present application or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flowchart illustrating a method for generating a wireless communication frame according to an embodiment of the present application;
fig. 2 is a schematic diagram of a preamble training sequence provided in an embodiment of the present application;
fig. 3 is one of schematic diagrams of signaling data sequences provided in an embodiment of the present application;
fig. 4 is a second schematic diagram of a signaling data sequence provided in the embodiment of the present application;
FIG. 5 is a diagram of an intermediate training sequence provided by an embodiment of the present application;
fig. 6 is a schematic diagram of a frame structure of a wireless communication frame according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of an apparatus for generating a wireless communication frame according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of an electronic device provided in an embodiment of the present application.
Detailed Description
To make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings in the present application, and it is obvious that the described embodiments are some, but not all embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The method for generating a wireless communication frame of the present application is described below with reference to fig. 1 to 6.
Referring to fig. 1, fig. 1 is a flowchart illustrating a method for generating a wireless communication frame according to an embodiment of the present disclosure. As shown in fig. 1, the method may include the steps of:
step 101, constructing a leading training sequence, wherein the autocorrelation of the leading training sequence is greater than a first autocorrelation, and the peak value average power ratio of the leading training sequence is lower than a first peak value average power ratio;
102, constructing a signaling data sequence, wherein the signaling data sequence comprises: a signaling symbol and a data symbol, the data symbol being located after the signaling symbol;
and 103, splicing the preamble training sequence and the signaling data sequence according to the sequence to generate a wireless communication frame.
In step 101, the first autocorrelation is a preset autocorrelation threshold, and if the autocorrelation is greater than the first autocorrelation, it means that the autocorrelation is stronger. The first peak-to-average power ratio is a preset peak-to-average power ratio threshold, and if the peak-to-average power ratio is lower than the first peak-to-average power ratio, the peak-to-average power is lower.
A preamble training sequence is constructed by a sequence in which an autocorrelation is greater than a first autocorrelation and a Peak to Average Power Ratio (PAPR) is lower than the first PAPR. That is, the preamble training sequence has strong autocorrelation and low peak average power.
In step 102, a signaling data sequence is constructed from signaling symbols and data symbols. In the signalling data sequence, the data symbols are located after the signalling symbols.
In step 103, the wireless communication frame is a complete communication unit of the physical layer in the communication protocol.
In the wireless communication frame, the sequence of the preamble training sequence and the signaling data sequence is as follows: the preamble training sequence precedes the signaling symbols, which precede the data symbols. And splicing the preamble training sequence and the signaling data sequence according to the sequence to generate a wireless communication frame.
In this embodiment, since the autocorrelation of the preamble training sequence is greater than the first autocorrelation, and the peak-to-average power ratio of the preamble training sequence is lower than the first peak-to-average power ratio, that is, the preamble training sequence has stronger autocorrelation and lower peak-to-average power, such a wireless communication frame may enable the wireless communication system to operate at a lower signal-to-noise ratio, and may enable the peer-to-peer communication in an area lacking cellular network coverage for a longer distance.
Optionally, step 101 comprises: splicing the cyclic prefix, the first ZC (Zaddoff Chu) sequences of the first number and the second ZC sequences according to the sequence to construct a leading training sequence; the first ZC sequences of the first number are the same, the phase difference between the second ZC sequences and the first ZC sequences is pi, and the cyclic prefix comprises the last sampling points of the preset number in the first ZC sequences.
The wireless communication frame of the embodiment is mainly applied to a low signal-to-noise scene, and is therefore more suitable for a narrow bandwidth system. The preamble training sequence is described below by taking a 2MHz system bandwidth as an example.
As shown in fig. 2, the preamble training sequence (preamble) includes: a cyclic prefix (i.e., a CP), a first number of first ZC sequences, and a second ZC sequence. The first number may be 12, and the embodiment is not limited thereto, and the 12 first ZC sequences (i.e. ZC1, ZC2, ZA3, … …, ZC 12) are identical, and the phase difference between the second ZC sequence (i.e. ZC 13) and the first ZC sequence is pi. The length of the first ZC sequence and the length of the second ZC sequence are both 64 points, and the cyclic prefix includes the last 16 sampling points in the first ZC sequence.
Taking 2MHz system bandwidth as an example, if the length of each sampling point is 500ns, the symbol lengths of the first ZC sequence and the second ZC sequence are both 32 μ s, the symbol length of the cyclic prefix is 8 μ s, and the length of the entire preamble training sequence is 8 μ s +32 μ s × 12+32 μ s =424 μ s.
It should be noted that the present embodiment is not limited to the 2MHz system bandwidth, and in an actual scenario, the system bandwidth may be flexibly modulated according to the data rate to be carried by the system.
In this embodiment, since the ZC sequence has a constant modulus (PAPR =0 dB), the transmission power of the preamble training sequence can be increased by 3dB compared with the transmission power of the data/signaling symbol without increasing the cost of the power amplifier, so that the system can operate at a lower signal-to-noise ratio.
In one embodiment, step 102 comprises: and splicing the second number of signaling symbols and the third number of data symbols according to the sequence to construct a signaling data sequence.
As shown in fig. 3, the signaling data sequence includes: a second number of signaling symbols and a third number of Data symbols, SIG represents a signaling symbol, data represents a Data symbol, the second number may be 4, the third number may be 31 × N, N is a positive integer, which is not limited in this embodiment.
Taking 2MHz system bandwidth as an example, the length of each sampling point is 500ns, each data/signaling symbol is composed of a cyclic prefix with a length of 16 points and an Orthogonal Frequency Division Multiplexing (OFDM) symbol with a length of 64 points, and the duration of 4 signaling symbols is (16 + 64) × 4 × 500ns =160 μ s. Data symbols are sent after the end of the signaling symbols, and the supported length is 31 × n symbols. And sequentially transmitting all data symbols in the low-mobility scene until all symbols are transmitted.
In this embodiment, the signaling data sequence is constructed by splicing the second number of signaling symbols and the third number of data symbols according to a sequence, and may be applicable to a low mobility scenario.
In another embodiment, step 102 comprises: splicing the second number of signaling symbols and the third number of data symbols according to the sequence, and inserting an intermediate training sequence every fourth number of data symbols to construct a signaling data sequence; wherein, the autocorrelation of the middle training sequence is greater than the second autocorrelation, the peak value average power ratio of the middle training sequence is lower than the second peak value average power ratio; the fourth quantity is inversely related to the channel variation rate.
As shown in fig. 4, the signaling data sequence includes: a second number of signaling symbols, a third number of data symbols, and an intermediate training sequence, one intermediate training sequence being inserted every M data symbols. Wherein SIG represents a signaling symbol, data represents a Data symbol, and Midamble represents an intermediate training sequence. The second number may be 4, the third number may be 31 × N, N is a positive integer, and M denotes the fourth number, which is not limited in this embodiment.
The autocorrelation of the intermediate training sequence is greater than the second autocorrelation, and the peak-to-average power ratio of the intermediate training sequence is lower than the second peak-to-average power ratio. That is, the midamble has strong autocorrelation and low peak average power.
M is negatively correlated with the channel variation speed, that is, in a high mobility scenario, the faster the channel variation speed is, the smaller the value of M should be. In the same implementation, multiple values of M may be configured to accommodate different channel environments, such as: the M value can be configured to be 8, 16, 32, etc., and the system can flexibly select an appropriate M value according to the channel change speed when transmitting the wireless communication frame.
In this embodiment, the second number of signaling symbols and the third number of data symbols are spliced according to a sequence, and an intermediate training sequence is inserted every fourth number of data symbols to construct a signaling data sequence; the intermediate training sequence has strong autocorrelation and low peak average power, and the fourth number is in negative correlation with the channel change speed, so that the appropriate fourth number can be flexibly selected according to the channel change speed, and the method can be suitable for high-mobility scenes.
Optionally, the intermediate training sequence is constructed by: splicing the cyclic prefix and the fifth number of first ZC sequences according to the sequence to construct an intermediate training sequence; the cyclic prefix includes a last preset number of sampling points in the first ZC sequence.
The sequence of the cyclic prefix and the fifth number of the first ZC sequences is: and the cyclic prefix is positioned before the fifth number of first ZC sequences, and the cyclic prefix and the fifth number of first ZC sequences are spliced according to the sequence to construct an intermediate training sequence.
As shown in fig. 5, the midamble includes: a cyclic prefix and a fifth number of first ZC sequences, the fifth number may be 8, and the embodiment is not limited thereto. Wherein the length of the first ZC sequence is 64 points, and the cyclic prefix includes the last 16 sampling points in the first ZC sequence. The first ZC sequence of the midamble is the same as the first ZC sequence of the preamble midamble.
Taking 2MHz system bandwidth as an example, if the length of each sampling point is 500ns, the symbol length of the first ZC sequence is 32 μ s, the symbol length of the cyclic prefix is 8 μ s, and the length of the entire midamble is 8 μ s +32 μ s × 8=264 μ s.
In this embodiment, since the ZC sequence has a constant modulus (PAPR =0 dB), the transmit power of the midamble can be increased by 3dB compared with the transmit power of the data/signaling symbol without increasing the cost of the power amplifier, so that the system can operate at a lower snr.
In a specific implementation, as shown in fig. 6, the wireless communication frame includes: a preamble training sequence, a signaling symbol, a data symbol, and an intermediate training sequence.
Taking 2MHz system bandwidth as an example, preamble represents a preamble training sequence, and the preamble training sequence may include: cyclic prefix and 13 ZC sequences, the length of the entire preamble training sequence may be 8 μ s +32 μ s x 13 μ s =424 μ s. The 13 th ZC sequence differs in phase from the first 12 ZC sequences by pi. The preamble training sequence is mainly used for performing Automatic Gain Control (AGC), packet detection, acquiring time-frequency synchronization information of a packet, and performing channel estimation.
The SIG may include 4 signaling symbols, each of which may consist of a cyclic prefix of length 16 points and an OFDM symbol of length 64 points, and the duration of the 4 signaling symbols may be (16 + 64) × 4 × 500ns =160 μ s. Signaling symbols are control signals required to ensure normal communication in a wireless communication system, in addition to transmitting user information, to enable full-network operation anecdotally, such as: modulation and Coding Scheme (MCS) signals, mobile Internet Device (MID) signals, and distance (Length) signals, etc.
The data symbols may be divided into N parts: data Seg0, data Seg1, … …, and Data SegN-1, each Data symbol may include M Data symbols. M is negatively correlated with the channel variation speed, and the faster the channel variation speed is, the smaller the value of M should be, for example: the value of M may be configured to be 8, 16, 32, etc. The data symbol may be composed of a cyclic prefix having a length of 16 points and an OFDM symbol having a length of 64 points, and the duration of the data symbol may be (16 + 64) × 500ns =40 μ s, and the duration of each data symbol may be 40 × M μ s. The data symbols are used to transmit data.
Midamble denotes an intermediate training sequence, which is inserted every M data symbols, and may include: the code length of the ZC sequence is 32 mu s, the code length of the cyclic prefix is 8 mu s, and the length of the whole middle training sequence is 8 mu s +32 mu s multiplied by 8=264 mu s. The midamble is used for channel estimation.
In this embodiment, on one hand, since the ZC sequence has a constant modulus (PAPR =0 dB), the transmission power of the preamble training sequence/midamble training sequence can be increased by 3dB compared with the transmission power of the data/signaling symbol without increasing the cost of the power amplifier, so that the system can operate at a lower signal-to-noise ratio. On the other hand, an intermediate training sequence is inserted every M data symbols, and a proper M value can be flexibly selected according to the channel change speed, so that the method is suitable for a high-mobility scene. Such wireless communication frames may enable the wireless communication system to operate in lower signal-to-noise ratio and high mobility scenarios, enabling longer range peer-to-peer communication in areas lacking cellular network coverage.
Optionally, the length of the preamble training sequence and the length of the midamble training sequence are both inversely related to the signal-to-noise ratio.
The lengths of the preamble training sequence and the middle training sequence can be adjusted according to the actual application scenario. For example: the length of the training sequence can be reduced in a high-SNR scenario on the premise that the system supports SIGNAL-to-NOISE RATIO (SNR) estimation.
In this embodiment, since both the length of the preamble training sequence and the length of the midamble training sequence are negatively correlated with the SNR, the length of the midamble training sequence can be reduced in a high SNR scenario, so as to further improve the data throughput of the system.
Optionally, the subcarrier mapping structure of the signaling symbol or the data symbol includes: a sixth number of data subcarriers and a seventh number of pilot subcarriers;
the power factors of the data subcarriers and the pilot subcarriers satisfy the following conditions:
the ratio of the sum between the first product, which is the product between the square of the power factor of the data subcarriers and the sixth number, and the sum between the sixth number and the seventh number to the sum between the first product, which is the product between the square of the power factor of the pilot subcarriers and the seventh number, is 1.
Specifically, the specific structures of the signaling symbol and the data symbol are the same, and both the signaling symbol and the data symbol are composed of a cyclic prefix with the length of 16 points and an OFDM symbol with the length of 64 points. Data information carried by the OFDM symbols is mapped to a designated subcarrier in a frequency domain, and then a corresponding time domain OFDM symbol is obtained through Inverse Fast Fourier Transform (IFFT), and specific subcarrier mapping is as follows.
Figure BDA0003883171220000111
Wherein:
Figure BDA0003883171220000112
Figure BDA0003883171220000113
wherein r (t) represents a time domain OFDM symbol; p k,n The pilot signal at the subcarrier k on the nth data symbol is generated in the same way as the pilot of 802.11 n; d i,n For the modulated signal carried on the nth symbol, i e [0,51]；T SYM Is the duration of the data symbol; t is CP A duration of a cyclic prefix; Δ f is the subcarrier spacing; scale D Is the power factor of the data sub-carrier; scale P Is the power factor of the pilot sub-carriers.
The power factor of the data sub-carrier and the power factor of the pilot sub-carrier are added, so that the transmitting power of the pilot signal can be improved on the premise of ensuring that the transmitting power of the whole OFDM symbol is not changed, and a better parameter estimation result is obtained. Therefore, for the subcarrier mapping structure of the current system (52 data subcarriers, 4 pilot subcarriers), the two power factors should satisfy the following relationship:
Figure BDA0003883171220000114
wherein the sixth number may be 52, the seventh number may be 4, and the first product may be
Figure BDA0003883171220000121
The second product may be
Figure BDA0003883171220000122
The present embodiment is not limited thereto.
In this embodiment, the power factor of the data subcarrier and the power factor of the pilot subcarrier are added, so that the transmission power of the pilot signal can be increased on the premise of ensuring that the transmission power of the whole OFDM symbol is unchanged, and a better parameter estimation result can be obtained.
The following describes a device for generating a wireless communication frame provided in the present application, and the device for generating a wireless communication frame described below and the method for generating a wireless communication frame described above may be referred to in correspondence with each other.
Referring to fig. 7, fig. 7 is a schematic structural diagram of an apparatus for generating a wireless communication frame according to an embodiment of the present application. As shown in fig. 7, the apparatus may include:
a first constructing module 10, configured to construct a preamble training sequence, where an autocorrelation of the preamble training sequence is greater than a first autocorrelation, and a peak-to-average power ratio of the preamble training sequence is lower than a first peak-to-average power ratio;
a second constructing module 20, configured to construct a signaling data sequence, where the signaling data sequence includes: a signaling symbol and a data symbol, the data symbol being located after the signaling symbol;
a generating module 30, configured to splice the preamble training sequence and the signaling data sequence according to a sequence to generate a wireless communication frame.
Optionally, the first construction module 10 is specifically configured to:
splicing the cyclic prefix, the first ZC sequences of the first number and the second ZC sequences according to the sequence to construct a leading training sequence;
the first ZC sequences of the first number are the same, the phase difference between the second ZC sequences and the first ZC sequences is pi, and the cyclic prefix comprises the last sampling points of the first ZC sequences of the preset number.
Optionally, the second construction module 20 is specifically configured to:
and splicing the second number of the signaling symbols and the third number of the data symbols according to the sequence to construct a signaling data sequence.
Optionally, the second construction module 20 is specifically configured to:
splicing the second number of the signaling symbols and the third number of the data symbols according to the sequence, and inserting an intermediate training sequence into every fourth number of the data symbols to construct a signaling data sequence;
wherein the autocorrelation of the intermediate training sequence is greater than a second autocorrelation, and the peak-to-average power ratio of the intermediate training sequence is lower than a second peak-to-average power ratio; the fourth quantity is inversely related to the channel variation rate.
Optionally, the second constructing module 20 is further configured to construct the intermediate training sequence by:
splicing the cyclic prefix and the fifth number of first ZC sequences according to the sequence to construct an intermediate training sequence;
wherein the cyclic prefix includes a last preset number of sample points in the first ZC sequence.
Optionally, the length of the preamble training sequence and the length of the midamble training sequence are both inversely related to the signal-to-noise ratio.
Optionally, the subcarrier mapping structure of the signaling symbol or the data symbol includes: a sixth number of data subcarriers and a seventh number of pilot subcarriers;
the power factors of the data subcarriers and the pilot subcarriers satisfy the following conditions:
a ratio of a sum between a first product and a second product to a sum between the sixth number and the seventh number is 1, the first product being a product between a square of a power factor of the data subcarriers and the sixth number, the second product being a product between a square of a power factor of the pilot subcarriers and the seventh number.
Fig. 8 illustrates a physical structure diagram of an electronic device, which may be a chip or a chip system, or a device including a chip. As shown in fig. 8, the electronic device may include: a processor (processor) 810, a communication Interface 820, a memory 830 and a communication bus 840, wherein the processor 810, the communication Interface 820 and the memory 830 communicate with each other via the communication bus 840. The processor 810 may invoke logic instructions in the memory 830 to perform a method of wireless communication frame generation, the method comprising:
constructing a leading training sequence, wherein the autocorrelation of the leading training sequence is greater than a first autocorrelation, and the peak-to-average power ratio of the leading training sequence is lower than a first peak-to-average power ratio;
constructing a signaling data sequence, the signaling data sequence comprising: a signaling symbol and a data symbol, the data symbol being located after the signaling symbol;
and splicing the preamble training sequence and the signaling data sequence according to the sequence to generate a wireless communication frame.
In addition, the logic instructions in the memory 830 may be implemented in software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In another aspect, the present application also provides a computer program product, the computer program product comprising a computer program stored on a computer-readable storage medium, the computer program comprising program instructions, which when executed by a computer, enable the computer to execute the method for generating a wireless communication frame provided by the above methods, the method comprising:
constructing a leading training sequence, wherein the autocorrelation of the leading training sequence is greater than the first autocorrelation, and the peak value average power ratio of the leading training sequence is lower than the first peak value average power ratio;
constructing a signaling data sequence, the signaling data sequence comprising: a signaling symbol and a data symbol, the data symbol being located after the signaling symbol;
and splicing the preamble training sequence and the signaling data sequence according to the sequence to generate a wireless communication frame.
In yet another aspect, the present application further provides a computer-readable storage medium having stored thereon a computer program, which when executed by a processor is implemented to perform the method for generating a wireless communication frame provided in the above aspects, the method including:
constructing a leading training sequence, wherein the autocorrelation of the leading training sequence is greater than a first autocorrelation, and the peak-to-average power ratio of the leading training sequence is lower than a first peak-to-average power ratio;
constructing a signaling data sequence, the signaling data sequence comprising: a signaling symbol and a data symbol, the data symbol being located after the signaling symbol;
and splicing the preamble training sequence and the signaling data sequence according to the sequence to generate a wireless communication frame.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present application.

Claims (10)

1. A method for generating a wireless communication frame, comprising:
constructing a leading training sequence, wherein the autocorrelation of the leading training sequence is greater than a first autocorrelation, and the peak-to-average power ratio of the leading training sequence is lower than a first peak-to-average power ratio;
constructing a signaling data sequence, the signaling data sequence comprising: a signaling symbol and a data symbol, the data symbol being located after the signaling symbol;
and splicing the preamble training sequence and the signaling data sequence according to the sequence to generate a wireless communication frame.
2. The method of claim 1, wherein the constructing the preamble training sequence comprises:
splicing the cyclic prefix, the first ZC sequences of the first number and the second ZC sequences according to the sequence to construct a leading training sequence;
the first ZC sequences of the first number are the same, the phase difference between the second ZC sequences and the first ZC sequences is pi, and the cyclic prefix comprises the last sampling points of the first ZC sequences of the preset number.
3. The method of generating a wireless communication frame according to claim 1 or 2, wherein the constructing a signaling data sequence comprises:
and splicing the second number of the signaling symbols and the third number of the data symbols according to the sequence to construct a signaling data sequence.
4. The method of generating a wireless communication frame according to claim 1 or 2, wherein the constructing a signaling data sequence comprises:
splicing the second number of the signaling symbols and the third number of the data symbols according to the sequence, and inserting an intermediate training sequence into every fourth number of the data symbols to construct a signaling data sequence;
wherein the autocorrelation of the intermediate training sequence is greater than a second autocorrelation, and the peak-to-average power ratio of the intermediate training sequence is lower than a second peak-to-average power ratio; the fourth quantity is inversely related to the channel variation rate.
5. The method of claim 4, wherein the midamble is constructed by:
splicing the cyclic prefix and the fifth number of first ZC sequences according to the sequence to construct an intermediate training sequence;
wherein the cyclic prefix includes a last preset number of sample points in the first ZC sequence.
6. The method of claim 4 or 5, wherein the length of the preamble training sequence and the length of the midamble training sequence are both inversely related to the signal-to-noise ratio.
7. The method of any one of claims 1-6, wherein the sub-carrier mapping structure of the signaling symbol or the data symbol comprises: a sixth number of data subcarriers and a seventh number of pilot subcarriers;
the power factors of the data subcarriers and the pilot subcarriers satisfy the following conditions:
a ratio of a sum between a first product and a second product to a sum between the sixth number and the seventh number is 1, the first product being a product between a square of a power factor of the data subcarriers and the sixth number, the second product being a product between a square of a power factor of the pilot subcarriers and the seventh number.
8. An apparatus for generating a wireless communication frame, comprising:
a first constructing module, configured to construct a preamble training sequence, where an autocorrelation of the preamble training sequence is greater than a first autocorrelation, and a peak-to-average power ratio of the preamble training sequence is lower than a first peak-to-average power ratio;
a second constructing module, configured to construct a signaling data sequence, where the signaling data sequence includes: a signaling symbol and a data symbol, the data symbol being located after the signaling symbol;
and the generating module is used for splicing the preamble training sequence and the signaling data sequence according to the sequence to generate a wireless communication frame.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method for generating a wireless communication frame according to any one of claims 1 to 7 when executing the computer program.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of generating a wireless communication frame according to any one of claims 1 to 7.
CN202211236498.2A 2022-10-10 2022-10-10 Wireless communication frame generation method and device, electronic equipment and storage medium Pending CN115632739A (en)

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