WO2017054563A1 - Data frame identification method and modulation method, relevant device and system - Google Patents

Abstract

Disclosed by the embodiment of the present invention is an identification method and modulation method of data frame, relevant device and system, the method comprises: receiving OFDM PHY data frame; demodulating OFDM signal in the OFDM PHY data frame to obtain a first demodulated signal and a second demodulated signal; calculating real part signal energy and imaginary part signal energy on the basis of the first demodulated signal and the second demodulated signal; determining that the OFDM PHY data frame is 802.11ay data frame if the real part signal energy is determined to be greater than or equal to the imaginary signal part energy. The embodiment of the present invention is advantageous for improving the identification efficiency of the 802.11ay data frame.

Description

Data frame identification method, modulation method, related device and system

This application claims the priority of the CN patent application filed on September 28, 2015, the Chinese Patent Office, Application No. 201510626054.3, entitled "A Data Frame Identification Method, Modulation Method, Related Device and System", the entire contents of which is hereby incorporated by reference. This is incorporated herein by reference.

Technical field

The present invention relates to the field of wireless communication technologies, and in particular, to a data frame identification method, a modulation method, a related device, and a system.

Background technique

The data transmission of the wireless transmission standard 802.11ad (hereinafter referred to as 802.11ad) mainly has two physical layer (PHY) frame formats, one is a single carrier SC PHY frame format, and the other is orthogonal frequency division multiplexing ( Orthogonal Frequency Division Multiplexing, OFDM) PHY frame format.

The inventor of the present invention found in the research process that in the SC PHY data frame, the Header indication signal adopts a modulation mode of pi/2-binary phase shift keying (BPSK), so that it can adopt the original Some frame recognition methods (that is, different data frames are identified by different modulation schemes of data frames), but in the OFDM PHY data frame, the Header indication signal adopts a modulation method of quadrature phase shift keying (Quadrature Phase Shift) Keyin, QPSK) modulation, and the use of dual carrier modulation (DCM) mechanism, the actual transmission of the 16 Quadrature Amplitude Modulation (QAM) constellation points, due to the wireless transmission standard 802.11ay (hereinafter referred to as 802.11ay) is also the modulation method of 16QAM. In this way, the prior art cannot effectively identify the 802.11ay data frame. Therefore, the 802.11ay data frame needs to adopt a more efficient manner to solve the problem of data frame identification.

Summary of the invention

Embodiments of the present invention provide a data frame identification method, a modulation method, a related device, and a system, so as to improve the recognition efficiency of an 802.11ay data frame.

A first aspect of the embodiments of the present invention discloses a data frame identification method, including:

Receiving a quadrature amplitude modulated OFDM physical layer PHY data frame;

Demodulating an OFDM signal in the OFDM PHY data frame to obtain a first demodulated signal and a second demodulated signal, the OFDM signal being based on a preset modulation after an ad-Header indication signal in the OFDM PHY data frame The first OFDM signal modulated by the mechanism;

Calculating a real part energy of the signal and an imaginary part energy of the signal based on the first demodulated signal and the second demodulated signal;

If it is determined that the real energy of the signal is greater than or equal to the imaginary part energy, the OFDM PHY data frame is determined to be an 802.11ay data frame.

In a first possible implementation manner of the first aspect of the present disclosure, the OFDM signal is marked as

r _k =h _k x _k

r _k' =h _k' x _k'

Where k=0,1...N _SD /2-1, the k′=k+N _SD /2, the N _SD is the number of data subcarriers, and the r _k is the kth subcarrier a received signal, the r _{k '} is a signal received on the k'th subcarrier, and the X _k is a signal component of the first 16 QAM modulated signal in the OFDM PHY data frame on the kth subcarrier, The X _{k '} is a signal component of the second 16 QAM modulated signal in the OFDM PHY data frame on the k′th subcarrier, the h _k is a channel of the X _k , and the h _k′ is the X _k' channel.

In a second possible implementation manner of the first aspect of the embodiments of the present invention, the OFDM signal in the OFDM PHY data frame is demodulated by using the first possible implementation manner of the first aspect of the embodiment of the present invention. Obtaining a first demodulated signal and a second demodulated signal, including:

Demodulating the OFDM signal in the OFDM PHY data frame by the following formula to obtain a first demodulated signal and a second demodulated signal:

Wherein Q ^-1 is a QPSK modulation inverse matrix, the S1k is a signal component of the first demodulated signal on a kth subcarrier, and the S2K is a second demodulated signal on a kth subcarrier Signal component.

A third possible implementation manner of the first aspect of the embodiment of the present invention, in combination with the first aspect of the embodiment of the present invention and any one of the first to the second aspect of the first aspect of the present invention The calculating the real energy of the signal and the imaginary part energy of the signal based on the first demodulated signal and the second demodulated signal, including:

Calculate the real energy of the signal and the energy of the imaginary part of the signal by the following formula:

The E1 is the real part energy of the signal, the E2 is the imaginary part energy of the signal, and the S1k is a signal component of the first demodulated signal on the kth subcarrier, and the S2K is A signal component of the second demodulated signal on the kth subcarrier.

A second aspect of the embodiments of the present invention provides a frame modulation method, where the method includes:

Modulating a first quadrature phase shift keying QPSK signal and a second QPSK signal on adjacent subcarriers by a preset modulation mechanism to obtain a first 16 orthogonal amplitude modulated QAM modulated signal and a second 16QAM modulated signal, the first The 16QAM modulated signal and the second 16QAM modulated signal are spaced apart by N _SD /2 subcarriers within an OFDM signal in a quadrature amplitude modulated OFDM physical layer PHY data frame;

Transmitting the OFDM PHY data frame carrying the first 16QAM modulated signal and the second 16QAM modulated signal.

With reference to the implementation manner of the second aspect of the embodiments of the present invention, in a first possible implementation manner of the second aspect of the embodiments, the first QPSK signal and the first sub-carrier are modulated by the preset modulation mechanism. The second QPSK signal is used to obtain the first 16QAM modulated signal and the second 16QAM modulated signal, including:

The first QPSK signal and the second QPSK signal on adjacent subcarriers are modulated by the following formula to obtain a first 16QAM modulated signal and a second 16QAM modulated signal:

Wherein said

a phase rotation factor multiplied by the first QPSK signal S1 and the second QPSK signal S2, the matrix Q being a QPSK modulation matrix, the S1 being the first QPSK signal, S2 is the second QPSK signal, the X1 is the first 16QAM modulated signal, and the X2 is the second 16QAM modulated signal.

With reference to the implementation manner of the second aspect of the embodiment of the present invention, in a second possible implementation manner of the second aspect of the embodiments, the first QPSK signal and the first sub-carrier are modulated by the preset modulation mechanism. The second QPSK signal is used to obtain the first 16QAM modulated signal and the second 16QAM modulated signal, including:

The first QPSK signal and the second QPSK signal on adjacent subcarriers are modulated by the following formula to obtain a first 16QAM modulated signal and a second 16QAM modulated signal:

or,

Wherein said

a phase rotation factor multiplied by the second QPSK signal S2 or multiplied by the first QPSK signal S1, the matrix Q being a QPSK modulation matrix, the S1 being the first QPSK signal, and the S2 being The second QPSK signal, the X1 is the first 16QAM modulated signal, and the X2 is the second 16QAM modulated signal.

A third aspect of the embodiments of the present invention provides a data frame identification apparatus, including:

a receiving unit, configured to receive a quadrature amplitude modulated OFDM physical layer PHY data frame;

a demodulation unit, configured to demodulate an OFDM signal in the OFDM PHY data frame received by the receiving unit to obtain a first demodulated signal and a second demodulated signal, where the OFDM signal is in the OFDM PHY data frame The first OFDM signal modulated by the ad-Header indication signal based on the preset modulation mechanism;

a calculating unit, configured to calculate a real part energy of the signal and an imaginary part energy of the signal based on the first demodulated signal and the second demodulated signal;

And a determining unit, configured to determine that the OFDM PHY data frame is an 802.11ay data frame if it is determined that the real energy of the signal is greater than or equal to the imaginary part energy.

With reference to the third aspect of the embodiments of the present invention, in a first possible implementation manner of the third aspect of the embodiments, the OFDM signal is marked as

r _k =h _k x _k

r _k' =h _k' x _k'

Where k=0,1...N _SD /2-1, the k′=k+N _SD /2, the N _SD is the number of data subcarriers, and the r _k is the kth subcarrier a received signal, the r _{k '} is a signal received on the k'th subcarrier, and the X _k is a signal component of the first 16 QAM modulated signal in the OFDM PHY data frame on the kth subcarrier, The X _{k '} is a signal component of the second 16 QAM modulated signal in the OFDM PHY data frame on the k′th subcarrier, the h _k is a channel of the X _k , and the h _k′ is the X _k' channel.

With reference to the first possible implementation manner of the third aspect of the embodiments of the present invention, in a second possible implementation manner of the third aspect of the embodiments, the demodulation unit is specifically configured to:

Demodulating the OFDM signal in the OFDM PHY data frame by the following formula to obtain a first demodulated signal and a second demodulated signal:

Wherein Q ^-1 is a QPSK modulation inverse matrix, the S1k is a signal component of the first demodulated signal on a kth subcarrier, and the S2K is a second demodulated signal on a kth subcarrier Signal component.

In conjunction with the third aspect of the embodiments of the present invention and any one of the first to the second embodiments of the third aspect of the present invention, the third possible implementation of the third aspect of the embodiment of the present invention In the mode, the calculating unit is specifically configured to:

Calculate the real energy of the signal and the energy of the imaginary part of the signal by the following formula:

The E1 is the real part energy of the signal, the E2 is the imaginary part energy of the signal, and the S1k is a signal component of the first demodulated signal on the kth subcarrier, and the S2K is The signal component of the second demodulated signal on the kth subcarrier, the N _SD being the number of data subcarriers.

A fourth aspect of the embodiments of the present invention provides a data frame modulating apparatus, including:

a modulating unit, configured to modulate a first quadrature phase shift keying QPSK signal and a second QPSK signal on adjacent subcarriers by using a preset modulation mechanism to obtain a first 16 orthogonal amplitude modulated QAM modulated signal and a second 16QAM modulated signal The first 16QAM modulated signal and the second 16QAM modulated signal are spaced apart by N _SD /2 subcarriers in an OFDM signal in a quadrature amplitude modulated OFDM physical layer PHY data frame;

And a sending unit, configured to send the OFDM PHY data frame carrying the first 16QAM modulated signal and the second 16QAM modulated signal.

With reference to the fourth aspect of the embodiments of the present invention, in a first possible implementation manner of the fourth aspect of the embodiments, the modulating unit is specifically configured to:

The first QPSK signal and the second QPSK signal on adjacent subcarriers are modulated by the following formula to obtain a first 16QAM modulated signal and a second 16QAM modulated signal:

Wherein said

a phase rotation factor multiplied by the first QPSK signal S1 and the second QPSK signal S2, the matrix Q being a QPSK modulation matrix, the S1 being the first QPSK signal, S2 is the second QPSK signal, the X1 is the first 16QAM modulated signal, and the X2 is the second 16QAM modulated signal.

With reference to the implementation of the fourth aspect of the embodiments of the present invention, in a second possible implementation manner of the fourth aspect of the embodiments, the modulating unit is specifically configured to:

The first QPSK signal and the second QPSK signal on adjacent subcarriers are modulated by the following formula to obtain a first 16QAM modulated signal and a second 16QAM modulated signal:

or,

Wherein said

a phase rotation factor multiplied by the second QPSK signal S2 or multiplied by the first QPSK signal S1, the matrix Q being a QPSK modulation matrix, the S1 being the first QPSK signal, and the S2 being The second QPSK signal, the X1 is the first 16QAM modulated signal, and the X2 is the second 16QAM modulated signal.

A fifth aspect of the embodiments of the present invention provides a data frame processing system, including:

A data frame identifying apparatus according to a third aspect of the present invention, and a data frame modulating apparatus according to the fourth aspect of the present invention.

In the embodiment of the present invention, an OFDM PHY data frame is first received, and second, an OFDM signal in an OFDM PHY data frame is demodulated to obtain a first demodulated signal and a second demodulated signal, and again, based on the first demodulated signal and the second Demodulate the signal, calculate the real energy of the signal and the energy of the imaginary part of the signal. Finally, if it is determined that the real energy of the signal is greater than or equal to the energy of the imaginary part of the signal, the OFDM PHY data frame is determined to be an 802.11ay data frame. Since the OFDM signal is a first OFDM signal modulated based on a preset modulation mechanism, the first demodulated signal and the second demodulated signal corresponding to the OFDM signal have a characteristic that the real energy of the signal is greater than or equal to the energy of the imaginary part of the signal, and thus The above characteristics can be used to quickly and easily identify the OFDM PHY data frame as an 802.11ay data frame, which is advantageous for improving the recognition efficiency of the 802.11ay data frame.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention and the technical solutions in the prior art, the drawings used in the embodiments and the prior art description will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1 is a schematic flow chart of a data frame identification method according to a first embodiment of the present invention;

2 is a schematic flow chart of a data frame identification method according to a second embodiment of the present invention;

3 is a schematic flow chart of a data frame identification method according to a third embodiment of the present invention;

FIG. 3-a is a schematic diagram of two adjacent QPSK signals in a Header indication signal in an 802.11ad data frame disclosed by a third embodiment of the present invention, which are modulated by a dual-carrier modulation DCM-based quadrature binary phase shift keying QPSK modulation mechanism. Constellation diagram

FIG. 3B is a constellation diagram obtained by modulating two adjacent QPSK signals in a Header indication signal in an 802.11ay data frame according to the third embodiment of the present invention by the first formula;

FIG. 3 is a constellation diagram of two adjacent QPSK signals in a Header indication signal in an 802.11ay data frame according to a third embodiment of the present invention, which are modulated by the second formula;

Figure 3-d is a constellation diagram of the first demodulated signal S _1k and the second demodulated signal S _1k disclosed in the third embodiment of the present invention;

Figure 3-d is a constellation diagram of the square S _1k ^{2 of the} first demodulated signal and the square S _2k ² of the second demodulated signal disclosed in the third embodiment of the present invention;

FIG. 3 e is a first demodulated signal S _1k and a second demodulated signal S obtained by processing a DQPSK signal of an adjacent subcarrier in the OFDM system according to the third embodiment of the present invention. S _2K square of the first demodulated signal _1k ^2, a first square of the demodulated signal constellation _2k ² is S;

FIG. 3 is a first demodulated signal S _1k and a second demodulated signal S obtained by processing the SQPSK signal of the adjacent subcarrier in the OFDM system according to the third embodiment of the present invention. S _2K square of the first demodulated signal _1k ^2, a first square of the demodulated signal constellation _2k ² is S;

FIG. 3 is a first demodulated signal S _1k and a second demodulated signal S obtained by processing a 16QAM signal of an adjacent subcarrier in the OFDM system according to the third embodiment of the present invention. S _2K square of the first demodulated signal _1k ^2, a first square of the demodulated signal constellation _2k ² is S;

4 is a schematic structural diagram of a data frame identification apparatus according to a fourth embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a data frame modulating apparatus according to a fifth embodiment of the present invention; FIG.

6 is a schematic structural diagram of a data frame processing system according to a sixth embodiment of the present invention;

FIG. 7 is a schematic structural diagram of another data frame identification apparatus according to a seventh embodiment of the present invention; FIG.

FIG. 8 is a schematic structural diagram of another data frame modulating apparatus according to a sixth embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of the present invention.

Embodiments of the present invention provide a data frame identification method, a modulation method, a related device, and a system, so as to improve the recognition efficiency of an 802.11ay data frame.

The technical solution of the embodiment of the present invention can be applied to the identification of data frames of the wireless transmission standard 802.11ad and the wireless transmission standard 802.11ay.

Referring to FIG. 1, FIG. 1 is a flow chart of a data frame identification method according to a first embodiment of the present invention. It is intended that the data frame identification method is described from one side of the data frame identification device, specifically for the identification of the 802.11ay data frame in the wireless transmission system, and the data frame identification device may be, for example, a signal receiving end in the OFDM system. The data frame identification method in this embodiment specifically includes the following steps:

S101. A data frame identification apparatus receives a quadrature amplitude modulated OFDM physical layer PHY data frame.

The OFDM PHY data frame received by the data frame identification device may be sent by a signal modulation end of the OFDM system.

S102. The data frame identifying apparatus demodulates an OFDM signal in the OFDM PHY data frame to obtain a first demodulated signal and a second demodulated signal, where the OFDM signal is an ad-Header indication in the OFDM PHY data frame. The first OFDM signal after the signal is modulated based on a preset modulation mechanism; wherein, for example, the number of data subcarriers in 802.11ad is 336.

In the embodiment of the present invention, the signal corresponding to the kth subcarrier in the OFDM signal is marked as

r _k =h _k x _k

r _k' =h _k' x _k'

Where k=0,1...N _SD /2-1, the k′=k+N _SD /2, the N _SD is the number of data subcarriers, and the r _k is the kth subcarrier a received signal, the r _{k '} is a signal received on the k'th subcarrier, and the X _k is a signal component of the first 16 QAM modulated signal in the OFDM PHY data frame on the kth subcarrier, The X _{k '} is a signal component of the second 16 QAM modulated signal in the OFDM PHY data frame on the k′th subcarrier, the h _k is a channel of the X _k , and the h _k′ is the X _k' channel.

In a specific implementation, the specific implementation manner that the data frame identification device demodulates the OFDM signal in the OFDM PHY data frame to obtain the first demodulated signal and the second demodulated signal may be:

Demodulating the OFDM signal in the OFDM PHY data frame by the following formula to obtain a first demodulated signal and a second demodulated signal:

Wherein Q ^-1 is a QPSK modulation inverse matrix, the S1k is a signal component of the first demodulated signal on a kth subcarrier, and the S2K is a second demodulated signal on a kth subcarrier Signal component.

It can be understood that the specific form of the preset modulation mechanism in the first OFDM signal modulated based on the preset modulation mechanism may be various.

In one mode, the specific form of the foregoing preset modulation mechanism may be

The S1 and the S2 are a first QPSK signal and a second QPSK signal on adjacent subcarriers in an OFDM system, where X1 is a first 16QAM modulated signal, and X2 is a second 16QAM modulated signal, Said

The phase rotation factor is multiplied by the first QPSK signal S1 and the second QPSK signal S2, which is a QPSK modulation matrix.

In another mode, the specific form of the foregoing preset modulation mechanism may be

or,

The S1 and the S2 are respectively a first QPSK signal and a second QPSK signal on adjacent subcarriers in the OFDM system, and the X1 is a first 16QAM modulated signal corresponding to the S1, the X2 a second 16QAM modulated signal corresponding to the S2, the

The phase rotation factor is multiplied by the second QPSK signal S2 or multiplied by the first QPSK signal S1, and the matrix Q is a QPSK modulation matrix.

S103. The data frame identification device calculates a real part energy of the signal and an imaginary part energy of the signal based on the first demodulated signal and the second demodulated signal;

In the embodiment of the present invention, the specific implementation manner of calculating the real energy of the signal and the energy of the imaginary part of the signal based on the first demodulated signal and the second demodulated signal may be:

Calculate the real energy of the signal and the energy of the imaginary part of the signal by the following formula:

The E1 is the real part energy of the signal, the E2 is the imaginary part energy of the signal, and the S1k is a signal component of the first demodulated signal on the kth subcarrier, and the S2K is A signal component of the second demodulated signal on the kth subcarrier.

S104. The data frame identification device determines that the OFDM PHY data frame is an 802.11ay data frame if it is determined that the real energy of the signal is greater than or equal to the imaginary part energy.

If the data frame identification device determines that the real energy of the signal is less than the imaginary energy of the signal, it may be determined that the OFDM PHY data frame is an 802.11ad data frame.

It can be seen that, in the embodiment of the present invention, an OFDM PHY data frame is first received, and second, an OFDM signal in an OFDM PHY data frame is demodulated to obtain a first demodulated signal and a second demodulated signal, and again, based on the first demodulation The signal and the second demodulated signal calculate the real energy of the signal and the energy of the imaginary part of the signal. Finally, if it is determined that the real energy of the signal is greater than or equal to the energy of the imaginary part of the signal, the OFDM PHY data frame is determined to be an 802.11ay data frame. Since the first demodulated signal and the second demodulated signal are obtained by demodulating a quadrature amplitude modulated OFDM signal, the OFDM signal is modulated by a preset modulation mechanism after the ad-Header indication signal in the OFDM PHY data frame. The first OFDM signal after has the following characteristics:

when

Then there are s ² ∈{±j};

when

Then there are s ² ∈{±j};

Wherein, S is the OFDM signal, that is, the real part energy of the first demodulated signal and the second demodulated signal corresponding to the OFDM signal is greater than or equal to the imaginary part energy of the signal, so that the OFDM can be quickly and easily identified by using the above characteristics. The PHY data frame is an 802.11ay data frame, which is advantageous for improving the recognition efficiency of the 802.11ay data frame.

Referring to FIG. 2, FIG. 2 is a schematic flowchart of a data frame modulation method according to a second embodiment of the present invention. The data frame modulation method is described from one side of a data frame modulation apparatus, and is specifically used in a wireless transmission system. For the identification of the 802.11ay data frame, the data frame modulating device may be, for example, a network element device of the signal transmitting end in the OFDM system. The data frame modulating method in this embodiment specifically includes the following steps:

S201. The data frame modulation apparatus modulates a first quadrature phase shift keying QPSK signal and a second QPSK signal on adjacent subcarriers by using a preset modulation mechanism to obtain a first 16 orthogonal amplitude modulated QAM modulated signal and a second a 16QAM modulated signal, wherein the first 16QAM modulated signal and the second 16QAM modulated signal are spaced apart by N _SD /2 subcarriers within an OFDM signal in a quadrature amplitude modulated OFDM physical layer PHY data frame;

It can be understood that the data frame modulation apparatus modulates the first quadrature phase shift keying QPSK signal and the second QPSK signal on the adjacent subcarriers by using a preset modulation mechanism to obtain the first 16 orthogonal amplitude modulated QAM modulated signals and The specific implementation of the second 16QAM modulated signal can be varied.

In one mode, the data frame modulating device modulates the first quadrature phase shift keying QPSK signal and the second QPSK signal on adjacent subcarriers by using a preset modulation mechanism to obtain a first 16 orthogonal amplitude modulated QAM modulated signal and The specific implementation manner of the second 16QAM modulated signal may be:

The first QPSK signal and the second QPSK signal on adjacent subcarriers are modulated by the following formula to obtain a first 16QAM modulated signal and a second 16QAM modulated signal:

Wherein said

a phase rotation factor multiplied by the first QPSK signal S1 and the second QPSK signal S2, the matrix Q being a QPSK modulation matrix, the S1 being the first QPSK signal, S2 is the second QPSK signal, the X1 is the first 16QAM modulated signal, and the X2 is the second 16QAM modulated signal.

In another mode, the data frame modulating device modulates the first quadrature phase shift keying QPSK signal and the second QPSK signal on the adjacent subcarriers by using a preset modulation mechanism to obtain the first 16 orthogonal amplitude modulated QAM modulated signal. And the specific implementation manner of the second 16QAM modulation signal may be:

The first QPSK signal and the second QPSK signal on adjacent subcarriers are modulated by the following formula to obtain a first 16QAM modulated signal and a second 16QAM modulated signal:

or,

Wherein said

a phase rotation factor multiplied by the second QPSK signal S2 or multiplied by the first QPSK signal S1, the matrix Q being a QPSK modulation matrix, the S1 being the first QPSK signal, and the S2 being The second QPSK signal, the X1 is the first 16QAM modulated signal, and the X2 is the second 16QAM modulated signal.

S202. The data frame modulation apparatus transmits the OFDM PHY data frame carrying the first 16QAM modulated signal and the second 16QAM modulated signal.

It can be seen that, in the embodiment of the present invention, the OFDM PHY data frame modulated by the preset modulation mechanism has the following characteristics:

when

Then there are s ² ∈{±j};

when

Then there are s ² ∈{±j};

Wherein, S is the OFDM signal, that is, the real part energy of the first demodulated signal and the second demodulated signal corresponding to the OFDM signal is greater than or equal to the imaginary part energy of the signal, so that the OFDM can be quickly and easily identified by using the above characteristics. The PHY data frame is an 802.11ay data frame, which is advantageous for improving the recognition efficiency of the 802.11ay data frame.

Referring to FIG. 3, FIG. 3 is a schematic flowchart diagram of a data frame processing method according to a third embodiment of the present invention. The data frame processing method is described from multiple sides of a data frame modulating device and a data frame identifying device. For the identification of the 802.11ay data frame in the wireless transmission system, the data frame processing method in this embodiment specifically includes the following steps:

S301. The data frame modulation apparatus modulates a first quadrature phase shift keying QPSK signal and a second QPSK signal on adjacent subcarriers by using a preset modulation mechanism to obtain a first 16 orthogonal amplitude modulated QAM modulated signal and a second a 16QAM modulated signal, wherein the first 16QAM modulated signal and the second 16QAM modulated signal are spaced apart by N _SD /2 subcarriers within an OFDM signal in a quadrature amplitude modulated OFDM physical layer PHY data frame;

In a specific implementation, the data frame modulation apparatus modulates the first quadrature phase shift keying QPSK signal and the second QPSK signal on the adjacent subcarriers by using a preset modulation mechanism to obtain the first 16 orthogonal amplitude modulation QAM modulated signal and the first The specific implementation of the two 16QAM modulated signals can be varied.

In one mode, the data frame modulating device modulates the first quadrature phase shift keying QPSK signal and the second QPSK signal on adjacent subcarriers by using a preset modulation mechanism to obtain a first 16 orthogonal amplitude modulated QAM modulated signal and The specific implementation manner of the second 16QAM modulated signal may be:

The data frame modulating device modulates the first quadrature phase shift keying QPSK signal and the second QPSK signal on adjacent subcarriers by using a preset modulation mechanism to obtain a first 16 orthogonal amplitude modulated QAM modulated signal and a second 16QAM modulated signal. The specific implementation can be:

The first QPSK signal and the second QPSK signal on the adjacent subcarriers are modulated by the following first formula to obtain the first 16QAM modulated signal and the second 16QAM modulated signal:

Wherein said

a phase rotation factor multiplied by the first QPSK signal S1 and the second QPSK signal S2, the matrix Q being a QPSK modulation matrix, the S1 being the first QPSK signal, S2 is the second QPSK signal, the X1 is the first 16QAM modulated signal, and the X2 is the second 16QAM modulated signal.

Further, referring to FIG. 3-a and FIG. 3-b, FIG. 3-a is a two-carrier QDC signal in a Header indication signal in an 802.11ad data frame, which is subjected to a dual-carrier modulation DCM-based orthogonal binary phase shift key. The constellation obtained by controlling the QPSK modulation mechanism is modulated, and FIG. 3-b is a constellation diagram obtained by modulating two adjacent QPSK signals in the Header indication signal in the 802.11ay data frame by the first formula.

Wherein, the QPSK modulation mechanism of the above DCM is specifically as follows:

Wherein the S1' and the S2' are two adjacent QPSK signals in a Header indication signal in an 802.11ad data frame, the matrix Q is a QPSK modulation matrix, and X1' is a DCM corresponding to the S1' The QPSK modulated signal, X2' is the QPSK modulated signal of the DCM corresponding to the S2'.

In another mode, the data frame modulating device modulates the first quadrature phase shift keying QPSK signal and the second QPSK signal on the adjacent subcarriers by using a preset modulation mechanism to obtain the first 16 orthogonal amplitude modulated QAM modulated signal. And the specific implementation manner of the second 16QAM modulation signal may be:

The first QPSK signal and the second QPSK signal on the adjacent subcarriers are modulated by the following second formula to obtain the first 16QAM modulated signal and the second 16QAM modulated signal:

or,

Wherein said

a phase rotation factor multiplied by the second QPSK signal S2 or multiplied by the first QPSK signal S1, the matrix Q being a QPSK modulation matrix, the S1 being the first QPSK signal, and the S2 being The second QPSK signal, the X1 is the first 16QAM modulated signal, and the X2 is the second 16QAM modulated signal.

Further, referring to FIG. 3-a and FIG. 3-c, FIG. 3-a is an orthogonal binary phase shift key of two adjacent QPSK signals in a Header indication signal in an 802.11ad data frame via dual carrier modulation DCM The constellation obtained by controlling the QPSK modulation mechanism is modulated, and FIG. 3-c is a constellation diagram obtained by modulating two adjacent QPSK signals in the Header indication signal in the 802.11ay data frame by the second formula.

S302. The data frame modulation apparatus transmits the OFDM PHY data frame carrying the first 16QAM modulated signal and the second 16QAM modulated signal.

S303. The data frame identifying apparatus receives a quadrature amplitude modulated OFDM physical layer PHY data frame.

S304, the data frame identifying apparatus demodulates an OFDM signal in the OFDM PHY data frame to obtain a first demodulated signal and a second demodulated signal, where the OFDM signal is an ad-Header indication in the OFDM PHY data frame. a first OFDM signal modulated after the signal based on a preset modulation mechanism;

In the embodiment of the present invention, the signal corresponding to the kth subcarrier in the OFDM signal is marked as

r _k =h _k x _k

r _k' =h _k' x _k'

Where k=0,1...N _SD /2-1, the k′=k+N _SD /2, the N _SD is the number of data subcarriers, and the r _k is the kth subcarrier a received signal, the r _{k '} is a signal received on the k'th subcarrier, and the X _k is a signal component of the first 16 QAM modulated signal in the OFDM PHY data frame on the kth subcarrier, The X _{k '} is a signal component of the second 16 QAM modulated signal in the OFDM PHY data frame on the k′th subcarrier, the h _k is a channel of the X _k , and the h _k′ is the X _k' channel.

In a specific implementation, the specific implementation manner that the data frame identification device demodulates the OFDM signal in the OFDM PHY data frame to obtain the first demodulated signal and the second demodulated signal may be:

Demodulating the OFDM signal in the OFDM PHY data frame by the following formula to obtain a first solution Tuning signal and second demodulating signal:

Wherein Q ^-1 is a QPSK modulation inverse matrix, the S1k is a signal component of the first demodulated signal on a kth subcarrier, and the S2K is a second demodulated signal on a kth subcarrier For details of the signal component, refer to FIG. 3-d. FIG. 3-d is a constellation diagram of the first demodulated signal S _1k and the second demodulated signal S _1k , and FIG. 3 d is a first demodulated signal. The constellation of the square S _1k ² and the square of the second demodulated signal S _2k ² .

S305. The data frame identification device calculates a real part energy of the signal and an imaginary part energy of the signal based on the first demodulated signal and the second demodulated signal.

In the embodiment of the present invention, the specific implementation manner of calculating the real energy of the signal and the energy of the imaginary part of the signal based on the first demodulated signal and the second demodulated signal may be:

Calculate the real energy of the signal and the energy of the imaginary part of the signal by the following formula:

The E1 is the real part energy of the signal, the E2 is the imaginary part energy of the signal, and the S1k is a signal component of the first demodulated signal on the kth subcarrier, and the S2K is The signal component of the second demodulated signal on the kth subcarrier, the N _SD being the number of data subcarriers.

S306. The data frame identification device determines that the OFDM PHY data frame is an 802.11ay data frame if it is determined that the real energy of the signal is greater than or equal to the imaginary part energy.

If the data frame identification device determines that the real energy of the signal is less than the imaginary energy of the signal, it may be determined that the OFDM PHY data frame is an 802.11ad data frame.

It can be seen that, in the embodiment of the present invention, the data frame modulating device first modulates the first quadrature phase shift keying QPSK signal and the second QPSK signal on the adjacent subcarriers by using a preset modulation mechanism to obtain the first 16 orthogonal amplitude. Modulating the QAM modulated signal and the second 16QAM modulated signal, and second, transmitting carries the a first 16QAM modulated signal and the OFDM PHY data frame of the second 16QAM modulated signal, again, the data frame identifying apparatus receives a quadrature amplitude modulated OFDM physical layer PHY data frame, and demodulates the OFDM in the OFDM PHY data frame And obtaining a first demodulated signal and a second demodulated signal, and calculating a real part energy of the signal and an imaginary part energy based on the first demodulated signal and the second demodulated signal, and finally, the data frame identifying apparatus If it is determined that the real energy of the signal is greater than or equal to the imaginary part energy, the OFDM PHY data frame is determined to be an 802.11ay data frame. It can be seen that the above data frame identification device can quickly and easily recognize that the OFDM PHY data frame is an 802.11ay data frame, which is beneficial to improving the recognition efficiency of the 802.11ay data frame.

For details, refer to FIG. 3-e, FIG. 3-f, and FIG. 3-g. FIG. 3-e is a diagram of the DQPSK signal of the adjacent subcarriers in the OFDM system processed by the data frame processing method of this embodiment. a first demodulated signal S _1k , a second demodulated signal S _2k and a square S _1k ² of the first demodulated signal, a constellation of the square S _2k ² of the first demodulated signal, and FIG. 3-f is a phase in the OFDM system The SQPSK signal of the adjacent subcarrier is processed by the data frame processing method of this embodiment, and the first demodulated signal S _1k , the second demodulated signal S _2k and the square of the first demodulated signal S _1k ² , the first demodulation a constellation of the square S _2k ² of the signal, and FIG. 3-g is a first demodulated signal S _1k obtained by processing the 16QAM signal of the adjacent subcarrier in the OFDM system by the data frame processing method of the embodiment, and the second demodulation A constellation of the signal S _2k with the square S _1k ² of the first demodulated signal and the square S _2k ² of the first demodulated signal.

Referring to FIG. 4, FIG. 4 is a schematic structural diagram of a data frame identification apparatus according to an embodiment of the present invention. The data frame identification apparatus is used to implement the data frame identification method described in FIG. 1, which may specifically be signal reception in an OFDM system. One network element device at the end. The data frame identification apparatus in the embodiment of the present invention may include at least a receiving unit 401, a demodulating unit 402, a calculating unit 403, and a determining unit 404, where:

The receiving unit 401 is configured to receive a quadrature amplitude modulated OFDM physical layer PHY data frame;

The demodulation unit 402 is configured to demodulate an OFDM signal in the OFDM PHY data frame received by the receiving unit to obtain a first demodulated signal and a second demodulated signal, where the OFDM signal is the OFDM PHY a first OFDM signal modulated according to a preset modulation mechanism after the ad-Header indication signal in the data frame;

The calculating unit 403 is configured to calculate, based on the first demodulated signal and the second demodulated signal Calculate the real energy of the signal and the energy of the imaginary part of the signal;

The determining unit 404 is configured to determine that the OFDM PHY data frame is an 802.11ay data frame if it is determined that the real energy of the signal is greater than or equal to the imaginary part energy.

Optionally, in the embodiment of the present invention, the OFDM signal is marked as

r _k =h _k x _k

r _k' =h _k' x _k'

Where k=0,1...N _SD /2-1, the k′=k+N _SD /2, the N _SD is the number of data subcarriers, and the r _k is the kth subcarrier a received signal, the r _{k '} is a signal received on the k'th subcarrier, and the X _k is a signal component of the first 16 QAM modulated signal in the OFDM PHY data frame on the kth subcarrier, The X _{k '} is a signal component of the second 16 QAM modulated signal in the OFDM PHY data frame on the k′th subcarrier, the h _k is a channel of the X _k , and the h _k′ is the X _k' channel.

Optionally, in the embodiment of the present invention, the demodulation unit is specifically configured to:

Demodulating the OFDM signal in the OFDM PHY data frame by the following formula to obtain a first demodulated signal and a second demodulated signal:

Wherein Q ^-1 is a QPSK modulation inverse matrix, the S1k is a signal component of the first demodulated signal on a kth subcarrier, and the S2K is a second demodulated signal on a kth subcarrier Signal component.

Optionally, in the embodiment of the present invention, the calculating unit is specifically configured to:

Calculate the real energy of the signal and the energy of the imaginary part of the signal by the following formula:

The E1 is the real part energy of the signal, the E2 is the imaginary part energy of the signal, and the S1k is a signal component of the first demodulated signal on the kth subcarrier, and the S2K is The signal component of the second demodulated signal on the kth subcarrier, the N _SD being the number of data subcarriers.

It can be seen that, in the embodiment of the present invention, an OFDM PHY data frame is first received, and second, an OFDM signal in an OFDM PHY data frame is demodulated to obtain a first demodulated signal and a second demodulated signal, and again, based on the first demodulation The signal and the second demodulated signal calculate the real energy of the signal and the energy of the imaginary part of the signal. Finally, if it is determined that the real energy of the signal is greater than or equal to the energy of the imaginary part of the signal, the OFDM PHY data frame is determined to be an 802.11ay data frame. Since the first demodulated signal and the second demodulated signal are obtained by demodulating a quadrature amplitude modulated OFDM signal, the OFDM signal is modulated by a preset modulation mechanism after the ad-Header indication signal in the OFDM PHY data frame. The first OFDM signal after has the following characteristics:

when

Then there are s ² ∈{±j};

when

Then there are s ² ∈{±j};

Wherein, S is the OFDM signal, that is, the real part energy of the first demodulated signal and the second demodulated signal corresponding to the OFDM signal is greater than or equal to the imaginary part energy of the signal, so that the OFDM can be quickly and easily identified by using the above characteristics. The PHY data frame is an 802.11ay data frame, which is advantageous for improving the recognition efficiency of the 802.11ay data frame.

Referring to FIG. 5, FIG. 5 is a schematic structural diagram of a data frame modulating apparatus according to an embodiment of the present invention. The data frame modulating apparatus is used to implement the data frame identification method described in FIG. 2, and specifically, may be a signal transmission in an OFDM system. One network element device at the end. The data frame modulating apparatus in the embodiment of the present invention as shown in the figure may at least include a modulating unit 501 and a transmitting unit 502, where:

The modulating unit 501 is configured to modulate a first quadrature phase shift keying QPSK signal and a second QPSK signal on adjacent subcarriers by using a preset modulation mechanism to obtain a first 16 orthogonal amplitude modulated QAM modulated signal and a second a 16QAM modulated signal, wherein the first 16QAM modulated signal and the second 16QAM modulated signal are spaced apart by N _SD /2 subcarriers within an OFDM signal in a quadrature amplitude modulated OFDM physical layer PHY data frame;

The sending unit 502 is configured to send the OFDM PHY data frame carrying the first 16QAM modulated signal and the second 16QAM modulated signal.

Optionally, in the embodiment of the present invention, the modulating unit is specifically configured to:

The first QPSK signal and the second QPSK signal on adjacent subcarriers are modulated by the following formula to obtain a first 16QAM modulated signal and a second 16QAM modulated signal:

Wherein said

a phase rotation factor multiplied by the first QPSK signal S1 and the second QPSK signal S2, the matrix Q being a QPSK modulation matrix, the S1 being the first QPSK signal, S2 is the second QPSK signal, the X1 is the first 16QAM modulated signal, and the X2 is the second 16QAM modulated signal.

Optionally, in the embodiment of the present invention, the modulating unit is specifically configured to:

The first QPSK signal and the second QPSK signal on adjacent subcarriers are modulated by the following formula to obtain a first 16QAM modulated signal and a second 16QAM modulated signal:

or,

Wherein said

a phase rotation factor multiplied by the second QPSK signal S2 or multiplied by the first QPSK signal S1, the matrix Q being a QPSK modulation matrix, the S1 being the first QPSK signal, and the S2 being The second QPSK signal, the X1 is the first 16QAM modulated signal, and the X2 is the second 16QAM modulated signal.

It can be seen that, in the embodiment of the present invention, the OFDM PHY data frame modulated by the preset modulation mechanism has the following characteristics:

when

Then there are s ² ∈{±j};

when

Then there are s ² ∈{±j};

Wherein, S is the OFDM signal, that is, the real part energy of the first demodulated signal and the second demodulated signal corresponding to the OFDM signal is greater than or equal to the imaginary part energy of the signal, so that the OFDM can be quickly and easily identified by using the above characteristics. The PHY data frame is an 802.11ay data frame, which is advantageous for improving the recognition efficiency of the 802.11ay data frame.

Please refer to FIG. 6. FIG. 6 is a schematic structural diagram of a data frame processing system according to an embodiment of the present invention. The data frame modulation apparatus is used to implement the data frame processing method described in FIG. As shown in the figure, the data frame processing system in the embodiment of the present invention may at least include a data frame modulating device 601 and a data frame identifying device 602, wherein:

The data frame modulating device 601 is configured to modulate a first quadrature phase shift keying QPSK signal and a second QPSK signal on adjacent subcarriers by using a preset modulation mechanism to obtain a first 16 orthogonal amplitude modulated QAM modulated signal and a second 16QAM modulated signal, wherein the first 16QAM modulated signal and the second 16QAM modulated signal are spaced apart by N _SD /2 subcarriers within an OFDM signal in a quadrature amplitude modulated OFDM physical layer PHY data frame;

The data frame modulating device 601 is further configured to send the OFDM PHY data frame carrying the first 16QAM modulated signal and the second 16QAM modulated signal.

The data frame identification device 602 is configured to receive a quadrature amplitude modulated OFDM physical layer PHY data frame;

The data frame identifying means 602 is further configured to demodulate the OFDM signal in the OFDM PHY data frame to obtain a first demodulated signal and a second demodulated signal, where the OFDM signal is in the OFDM PHY data frame -Header indicates the first OFDM signal modulated after the signal based on the preset modulation mechanism;

The data frame identification device 602 is further configured to calculate a real part energy of the signal and an imaginary part energy of the signal based on the first demodulated signal and the second demodulated signal;

The data frame identification device 602 is further configured to determine that the OFDM PHY data frame is an 802.11ay data frame if it is determined that the real energy of the signal is greater than or equal to the imaginary part energy of the signal.

It can be seen that, in the embodiment of the present invention, the data frame modulating device first modulates the first quadrature phase shift keying QPSK signal and the second QPSK signal on the adjacent subcarriers by using a preset modulation mechanism to obtain the first 16 orthogonal amplitude. Modulating the QAM modulated signal and the second 16QAM modulated signal, and secondly, transmitting the OFDM PHY data frame carrying the first 16QAM modulated signal and the second 16QAM modulated signal, and again, the data frame identifying device receives the quadrature amplitude modulation An OFDM physical layer PHY data frame, demodulating an OFDM signal in the OFDM PHY data frame to obtain a first demodulated signal and a second demodulated signal, and based on the first demodulated signal and the second demodulated signal Calculating the real energy of the signal and the energy of the imaginary part of the signal. Finally, if the data frame identification device determines that the real energy of the signal is greater than or equal to the energy of the imaginary part of the signal, Then determining that the OFDM PHY data frame is an 802.11ay data frame. It can be seen that the above data frame identification device can quickly and easily recognize that the OFDM PHY data frame is an 802.11ay data frame, which is beneficial to improving the recognition efficiency of the 802.11ay data frame.

Referring to FIG. 7, FIG. 7 is a schematic structural diagram of another data frame identification apparatus according to an embodiment of the present invention. As shown in FIG. 7, the data frame identification apparatus may include: at least one processor 701, such as a CPU, at least one. Network interface 703, memory 704, at least one communication bus 702. Among them, the communication bus 702 is used to implement connection communication between these components. The network interface 703 can be a wireless interface, such as an antenna device, for signaling or data communication with other node devices. The memory 704 may be a high speed RAM memory or a non-volatile memory such as at least one disk memory. Optionally, the memory 704 may also be at least one storage device located away from the foregoing processor 701. A set of program codes is stored in the memory 704, and the processor 701 is configured to call the program code stored in the memory 704 to perform the following operations:

Receiving a quadrature amplitude modulated OFDM physical layer PHY data frame;

Demodulating an OFDM signal in the OFDM PHY data frame to obtain a first demodulated signal and a second demodulated signal, the OFDM signal being based on a preset modulation after an ad-Header indication signal in the OFDM PHY data frame The first OFDM signal modulated by the mechanism;

Calculating a real part energy of the signal and an imaginary part energy of the signal based on the first demodulated signal and the second demodulated signal;

If it is determined that the real energy of the signal is greater than or equal to the imaginary part energy, the OFDM PHY data frame is determined to be an 802.11ay data frame.

Optionally, the OFDM signal is marked as

r _k =h _k x _k

r _k' =h _k' x _k'

Where k=0,1...N _SD /2-1, the k′=k+N _SD /2, the N _SD is the number of data subcarriers, and the r _k is the kth subcarrier a received signal, the r _{k '} is a signal received on the k'th subcarrier, and the X _k is a signal component of the first 16 QAM modulated signal in the OFDM PHY data frame on the kth subcarrier, The X _{k '} is a signal component of the second 16 QAM modulated signal in the OFDM PHY data frame on the k'th subcarrier, the h _k is the channel of the X _k , and the h _{k '} is the X _k' channel.

Optionally, the processor 701 demodulates the OFDM signal in the OFDM PHY data frame to obtain the first demodulated signal and the second demodulated signal, including:

Demodulating the OFDM signal in the OFDM PHY data frame by the following formula to obtain a first demodulated signal and a second demodulated signal:

Wherein Q ^-1 is a QPSK modulation inverse matrix, the S1k is a signal component of the first demodulated signal on a kth subcarrier, and the S2K is a second demodulated signal on a kth subcarrier Signal component.

Optionally, the processor 701 calculates the real energy of the signal and the imaginary part energy of the signal based on the first demodulated signal and the second demodulated signal, including:

Calculate the real energy of the signal and the energy of the imaginary part of the signal by the following formula:

The E1 is the real part energy of the signal, the E2 is the imaginary part energy of the signal, and the S1k is a signal component of the first demodulated signal on the kth subcarrier, and the S2K is The signal component of the second demodulated signal on the kth subcarrier, the N _SD being the number of data subcarriers.

It can be seen that, in the embodiment of the present invention, an OFDM PHY data frame is first received, and second, an OFDM signal in an OFDM PHY data frame is demodulated to obtain a first demodulated signal and a second demodulated signal, and again, based on the first demodulation The signal and the second demodulated signal calculate the real energy of the signal and the energy of the imaginary part of the signal. Finally, if it is determined that the real energy of the signal is greater than or equal to the energy of the imaginary part of the signal, the OFDM PHY data frame is determined to be an 802.11ay data frame. Since the first demodulated signal and the second demodulated signal are obtained by demodulating a quadrature amplitude modulated OFDM signal, the OFDM signal is modulated by a preset modulation mechanism after the ad-Header indication signal in the OFDM PHY data frame. The first OFDM signal after has the following characteristics:

when

Then there are s ² ∈{±j};

when

Then there are s ² ∈{±j};

Wherein, S is the OFDM signal, that is, the real part energy of the first demodulated signal and the second demodulated signal corresponding to the OFDM signal is greater than or equal to the imaginary part energy of the signal, so that the OFDM can be quickly and easily identified by using the above characteristics. The PHY data frame is an 802.11ay data frame, which is advantageous for improving the recognition efficiency of the 802.11ay data frame.

Referring to FIG. 8, FIG. 8 is a schematic structural diagram of another data frame modulating apparatus according to an embodiment of the present invention. As shown in FIG. 8, the data frame modulating apparatus may include: at least one processor 801, such as a CPU, at least one. Network interface 803, memory 804, at least one communication bus 802. Among them, the communication bus 802 is used to implement connection communication between these components. The network interface 803 can be a wireless interface, such as an antenna device, for signaling or data communication with other node devices. The memory 804 may be a high speed RAM memory or a non-volatile memory such as at least one disk memory. Optionally, the memory 804 may also be at least one storage device located away from the foregoing processor 801. A set of program codes is stored in the memory 804, and the processor 801 is configured to call the program code stored in the memory 804 to perform the following operations:

Modulating a first quadrature phase shift keying QPSK signal and a second QPSK signal on adjacent subcarriers by a preset modulation mechanism to obtain a first 16 orthogonal amplitude modulated QAM modulated signal and a second 16QAM modulated signal, the first The 16QAM modulated signal and the second 16QAM modulated signal are spaced apart by N _SD /2 subcarriers within an OFDM signal in a quadrature amplitude modulated OFDM physical layer PHY data frame;

Transmitting the OFDM PHY data frame carrying the first 16QAM modulated signal and the second 16QAM modulated signal.

Optionally, the processor 801 modulates the first QPSK signal and the second QPSK signal on the adjacent subcarriers by using a preset modulation mechanism to obtain the first 16QAM modulated signal and the second 16QAM modulated signal, including:

The first QPSK signal and the second QPSK signal on adjacent subcarriers are modulated by the following formula to obtain a first 16QAM modulated signal and a second 16QAM modulated signal:

Wherein said

a phase rotation factor multiplied by the first QPSK signal S1 and the second QPSK signal S2, the matrix Q being a QPSK modulation matrix, the S1 being the first QPSK signal, S2 is the second QPSK signal, the X1 is the first 16QAM modulated signal, and the X2 is the second 16QAM modulated signal.

Optionally, the processor 801 modulates the first QPSK signal and the second QPSK signal on the adjacent subcarriers by using a preset modulation mechanism to obtain the first 16QAM modulated signal and the second 16QAM modulated signal, including:

The first QPSK signal and the second QPSK signal on adjacent subcarriers are modulated by the following formula to obtain a first 16QAM modulated signal and a second 16QAM modulated signal:

or,

Wherein said

a phase rotation factor multiplied by the second QPSK signal S2 or multiplied by the first QPSK signal S1, the matrix Q being a QPSK modulation matrix, the S1 being the first QPSK signal, and the S2 being The second QPSK signal, the X1 is the first 16QAM modulated signal, and the X2 is the second 16QAM modulated signal.

It can be seen that, in the embodiment of the present invention, the OFDM PHY data frame modulated by the preset modulation mechanism has the following characteristics:

when

Then there are s ² ∈{±j};

when

Then there are s ² ∈{±j};

Wherein, S is the OFDM signal, that is, the real part energy of the first demodulated signal and the second demodulated signal corresponding to the OFDM signal is greater than or equal to the imaginary part energy of the signal, so that the OFDM can be quickly and easily identified by using the above characteristics. The PHY data frame is an 802.11ay data frame, which is advantageous for improving the recognition efficiency of the 802.11ay data frame.

The embodiment of the invention further provides a computer storage medium, wherein the computer storage medium can be stored A program is stored, and the program includes some or all of the steps of any one of the methods described in the above method embodiments.

In the above embodiments, the descriptions of the various embodiments are different, and the details that are not detailed in a certain embodiment can be referred to the related descriptions of other embodiments.

It should be noted that, for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations, but those skilled in the art should understand that the present invention is not limited by the described action sequence. Because certain steps may be performed in other sequences or concurrently in accordance with the present invention. In addition, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

In the several embodiments provided herein, it should be understood that the disclosed apparatus may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the above units is only a logical function division. In actual implementation, there may be another division manner. For example, multiple units or components may be combined or integrated. Go to another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical or otherwise.

The units described above as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The above-described integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium. , including a number of instructions to make a computer device (can be a personal computer, server Alternatively, the network device or the like, in particular a processor in the computer device, performs all or part of the steps of the above-described methods of various embodiments of the present invention. The foregoing storage medium may include: a U disk, a mobile hard disk, a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM), and the like. The medium of the code.

The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the embodiments are modified, or the equivalents of the technical features are replaced by the equivalents of the technical solutions of the embodiments of the present invention.

Claims (15)

1. A data frame identification method, comprising:

   Receiving a quadrature amplitude modulated OFDM physical layer PHY data frame;

   Demodulating an OFDM signal in the OFDM PHY data frame to obtain a first demodulated signal and a second demodulated signal, the OFDM signal being based on a preset modulation after an ad-Header indication signal in the OFDM PHY data frame The first OFDM signal modulated by the mechanism;

   Calculating a real part energy of the signal and an imaginary part energy of the signal based on the first demodulated signal and the second demodulated signal;

   If it is determined that the real energy of the signal is greater than or equal to the imaginary part energy, the OFDMPHY data frame is determined to be an 802.11ay data frame.
2. The method of claim 1 wherein said OFDM signal is marked as

   r _k =h _k x _k

   r _k' =h _k' x _k'

   Where k=0,1...N _SD /2-1, the k′=k+N _SD /2, the N _SD is the number of data subcarriers, and the r _k is the kth subcarrier a received signal, the r _{k '} is a signal received on the k'th subcarrier, and the X _k is a signal component of the first 16 QAM modulated signal in the OFDM PHY data frame on the kth subcarrier, The X _{k '} is a signal component of the second 16 QAM modulated signal in the OFDM PHY data frame on the k′th subcarrier, the h _k is a channel of the X _k , and the h _k′ is the X _k' channel.
3. The method according to claim 2, wherein the demodulating the OFDM signal in the OFDM PHY data frame to obtain the first demodulated signal and the second demodulated signal comprises:

   Demodulating the OFDM signal in the OFDM PHY data frame by the following formula to obtain a first demodulated signal and a second demodulated signal:

   

   Wherein Q ^-1 is a QPSK modulation inverse matrix, the S1k is a signal component of the first demodulated signal on a kth subcarrier, and the S2K is a second demodulated signal on a kth subcarrier Signal component.
4. The method according to any one of claims 1 to 3, wherein the calculating the real energy of the signal and the imaginary part energy of the signal based on the first demodulated signal and the second demodulated signal comprises:

   Calculate the real energy of the signal and the energy of the imaginary part of the signal by the following formula:

   

   

   Wherein E1 is the real energy of the signal, and E2 is the imaginary part energy of the signal.
5. A data frame modulation method, comprising:

   Modulating a first quadrature phase shift keying QPSK signal and a second QPSK signal on adjacent subcarriers by a preset modulation mechanism to obtain a first 16 orthogonal amplitude modulated QAM modulated signal and a second 16QAM modulated signal, the first The 16QAM modulated signal and the second 16QAM modulated signal are spaced apart by N _SD /2 subcarriers within an OFDM signal in a quadrature amplitude modulated OFDM physical layer PHY data frame;

   Transmitting the OFDM PHY data frame carrying the first 16QAM modulated signal and the second 16QAM modulated signal.
6. The method according to claim 5, wherein the first QPSK signal and the second QPSK signal on adjacent subcarriers are modulated by a preset modulation mechanism to obtain a first 16QAM modulated signal and a second 16QAM modulated signal, include:

   The first QPSK signal and the second QPSK signal on adjacent subcarriers are modulated by the following formula to obtain a first 16QAM modulated signal and a second 16QAM modulated signal:

   

   Wherein said

   

   a phase rotation factor multiplied by the first QPSK signal S1 and the second QPSK signal S2, the matrix Q being a QPSK modulation matrix, the S1 being the first QPSK signal, S2 is the second QPSK signal, the X1 is the first 16QAM modulated signal, and the X2 is the second 16QAM modulated signal.
7. The method according to claim 5, wherein the first QPSK signal and the second QPSK signal on adjacent subcarriers are modulated by a preset modulation mechanism to obtain a first 16QAM modulated signal and a second 16QAM modulated signal, include:

   The first QPSK signal and the second QPSK signal on adjacent subcarriers are modulated by the following formula to obtain a first 16QAM modulated signal and a second 16QAM modulated signal:

   

   or,

   

   Wherein said

   

   a phase rotation factor multiplied by the second QPSK signal S2 or multiplied by the first QPSK signal S1, the matrix Q being a QPSK modulation matrix, the S1 being the first QPSK signal, and the S2 being The second QPSK signal, the X1 is the first 16QAM modulated signal, and the X2 is the second 16QAM modulated signal.
8. A data frame identification device, comprising:

   a receiving unit, configured to receive a quadrature amplitude modulated OFDM physical layer PHY data frame;

   a demodulation unit, configured to demodulate an OFDM signal in the OFDM PHY data frame received by the receiving unit to obtain a first demodulated signal and a second demodulated signal, where the OFDM signal is in the OFDM PHY data frame The first OFDM signal modulated by the ad-Header indication signal based on a preset modulation mechanism, where the N _SD is the number of data subcarriers;

   a calculating unit, configured to calculate a real part energy of the signal and an imaginary part energy of the signal based on the first demodulated signal and the second demodulated signal;

   And a determining unit, configured to determine that the OFDM PHY data frame is an 802.11ay data frame if it is determined that the real energy of the signal is greater than or equal to the imaginary part energy.
9. The apparatus of claim 8 wherein said OFDM signal is marked as

   r _k =h _k x _k

   r _k' =h _k' x _k'

   Where k=0,1...N _SD /2-1, the k′=k+N _SD /2, the N _SD is the number of data subcarriers, and the r _k is the kth subcarrier a received signal, the r _{k '} is a signal received on the k'th subcarrier, and the X _k is a signal component of the first 16 QAM modulated signal in the OFDM PHY data frame on the kth subcarrier, The X _{k '} is a signal component of the second 16 QAM modulated signal in the OFDM PHY data frame on the k'th subcarrier, the h _k is the channel of the X _k , and the h _{k '} is the X _k' channel.
10. The apparatus according to claim 9, wherein the demodulation unit is specifically configured to:

    Demodulating the OFDM signal in the OFDM PHY data frame by the following formula to obtain a first demodulated signal and a second demodulated signal:

    

    Wherein Q ^-1 is a QPSK modulation inverse matrix, the S1k is a signal component of the first demodulated signal on a kth subcarrier, and the S2K is a second demodulated signal on a kth subcarrier Signal component.
11. The device according to any one of claims 8 to 10, wherein the calculating unit is specifically configured to:

    Calculate the real energy of the signal and the energy of the imaginary part of the signal by the following formula:

    

    

    The E1 is the real part energy of the signal, the E2 is the imaginary part energy of the signal, and the S1k is a signal component of the first demodulated signal on the kth subcarrier, and the S2K is The signal component of the second demodulated signal on the kth subcarrier, the N _SD being the number of data subcarriers.
12. A data frame modulating device, comprising:

    a modulating unit, configured to modulate a first quadrature phase shift keying QPSK signal and a second QPSK signal on adjacent subcarriers by using a preset modulation mechanism to obtain a first 16 orthogonal amplitude modulated QAM modulated signal and a second 16QAM modulated signal The first 16QAM modulated signal and the second 16QAM modulated signal are spaced apart by N _SD /2 subcarriers in an OFDM signal in a quadrature amplitude modulated OFDM physical layer PHY data frame;

    And a sending unit, configured to send the OFDM PHY data frame carrying the first 16QAM modulated signal and the second 16QAM modulated signal.
13. The device according to claim 12, wherein the modulating unit is specifically configured to:

    The first QPSK signal and the second QPSK signal on adjacent subcarriers are modulated by the following formula to obtain a first 16QAM modulated signal and a second 16QAM modulated signal:

    

    Wherein said

    

    a phase rotation factor multiplied by the first QPSK signal S1 and the second QPSK signal S2, the matrix Q being a QPSK modulation matrix, the S1 being the first QPSK signal, S2 is the second QPSK signal, the X1 is the first 16QAM modulated signal, and the X2 is the second 16QAM modulated signal.
14. The device according to claim 12, wherein the modulating unit is specifically configured to:

    The first QPSK signal and the second QPSK signal on adjacent subcarriers are modulated by the following formula to obtain a first 16QAM modulated signal and a second 16QAM modulated signal:

    

    or,

    

    Wherein said

    

    a phase rotation factor multiplied by the second QPSK signal S2 or multiplied by the first QPSK signal S1, the matrix Q being a QPSK modulation matrix, the S1 being the first QPSK signal, and the S2 being The second QPSK signal, the X1 is the first 16QAM modulated signal, and the X2 is the second 16QAM modulated signal.
15. A data frame processing system, comprising:

    A data frame identifying apparatus according to any one of claims 8 to 11 and a data frame modulating apparatus according to any one of claims 12-14.

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