WO2017041585A1

WO2017041585A1 - Signal processing method, sending station and receiving station

Info

Publication number: WO2017041585A1
Application number: PCT/CN2016/090677
Authority: WO
Inventors: 颜敏; 吴涛
Original assignee: 华为技术有限公司
Priority date: 2015-09-10
Filing date: 2016-07-20
Publication date: 2017-03-16
Also published as: CN106534017B; WO2017041585A9; CN106534017A

Abstract

An embodiment of the present invention discloses a signal processing method, sending station and receiving station, the method comprising: a sending station acquires a target signal for indicating a signal transmission characteristic and classifies a standard of the encapsulation of the target signal, the standard classifications comprising a first standard or a second standard; if the standard is classified as the first standard, the sending station performs an inversion operation on the target signal; the sending station encapsulates the inverted target signal into a preset field of a first standard frame, so as to obtain a first-standard frame having an inversion characteristic; and the sending station sends the first-standard frame having the inversion characteristic. The present invention can realize identification by a receiving station of two kinds of standard frame.

Description

Signal processing method, transmitting station and receiving station

This application claims the priority of the Chinese patent application filed on September 10, 2015, the Chinese Patent Office, application number 201510574936.X, and the invention name is “a signal processing method, a transmitting station, and a receiving station”. The citations are incorporated herein by reference.

Technical field

The present invention relates to the field of communications technologies, and in particular, to a signal processing method, a transmitting station, and a receiving station.

Background technique

In the 60G Wireless Local Area Network (WIFI), the existing standard is mainly 802.11ad. The standard currently supports a maximum rate of 6.7 Gbps. In order to meet higher rate requirements, new technologies and standards need to be introduced. For example, the new standard 802.11ay is currently introduced based on the 802.11ad standard. The introduction of the new standard needs to meet backward compatibility. The backward compatibility mainly includes two points: 1. The device corresponding to the new standard can not only access the 802.11ad device, but also does not interfere with the original device. . In an actual WIFI system, when data is transmitted to a device supporting the new standard 802.11ay, the data is encapsulated into an 802.11ay frame according to the 802.11ay standard, and for a device supporting the new standard 802.11ay, when receiving data, an 802.11ay frame and The 802.11ad frame is automatically identified. If it is an 802.11ad frame, the frame structure is parsed according to the 802.11ad standard. If it is an 802.11ay frame, the frame structure is parsed according to the 802.11ay standard, thereby achieving a device capable of accessing 802.11ad. It does not cause interference to existing 802.11ad devices.

Different from the traditional 802.11a, 802.11n and 802.11ac standards, in 802.11ad and 802.11ay, data transmission mainly has two physical transmission modes, one is single carrier (SC) physical transmission mode, and the other is Orthogonal Frequency Division Multiplexing (OFDM) physical transmission method. In the SC physical transmission, the 802.11ad Header indication signal adopts the modulation mode of pi/2-BPSK, and the 802.11ay Header indication signal can adopt the original frame recognition mode as long as it adopts a modulation mode different from 802.11ad. Identification, that is, determining the distribution of the energy of the modulated Header indication signal in the real axis and the imaginary axis of the constellation to identify the frame type. However, in OFDM physical transmission, the modulation method adopted by 802.11ad is QPSK. Modulation, and the use of dual carrier modulation (D CM) mechanism, that is, the distribution of the energy of the modulated Header indication signal in the constellation is messy and irregular, and 802.11ay is also used in OFDM physical transmission. The D CM mechanism. In this way, the prior art cannot use different modulation methods to distinguish different frames. Therefore, in a OFDM physical transmission system, a more efficient way to solve the problem of frame recognition is needed.

Summary of the invention

The embodiment of the invention provides a signal processing method, a transmitting station and a receiving station, which can perform the inversion operation of the target signal in a standard frame by the transmitting station in the OFDM physical transmission system, so as to realize the identification of the two standard frames by the receiving station.

A first aspect of the embodiments of the present invention provides a signal processing method, which is applied to an OFDM physical transmission system for orthogonal frequency division multiplexing, and may include:

The transmitting station acquires a target signal for indicating a signal transmission characteristic and a standard category for encapsulating the target signal, the standard category including a first standard or a second standard;

If the standard category is the first criterion, the sending station performs an inverse operation on the target signal;

The sending station encapsulates the target signal after performing the inversion operation into a preset field of the first standard frame, to obtain the first standard frame with the inversion feature;

The transmitting station transmits the first standard frame with a negation feature.

Based on the first aspect, in a first possible implementation manner of the first aspect, the first standard is an 802.11ay standard, and the second standard is an 802.11ad standard;

The preset field of the first standard frame is an EDMG-Header field.

A second aspect of the embodiments of the present invention provides a signal processing method, which is applied to an OFDM physical transmission system, and includes:

Receiving a target frame by the receiving station, and intercepting a target field of the preset position in the target frame;

The receiving station processes the signal carried in the target field, and determines whether there is an inversion feature in the target field according to the processing result;

If there is an inversion feature, the receiving station determines that the target frame is a first standard frame;

If there is no inversion feature, the receiving station determines that the target frame is a second standard frame.

Based on the second aspect, in a first possible implementation manner of the second aspect, the first standard frame is a preset that is encapsulated into the first standard frame after the target station that supports the first standard is to be inverted. The frame structure formed in the field;

The preset field of the first standard frame includes three data units, wherein the preset data unit encapsulates the target signal after being inverted, and the other two data units respectively encapsulate the target signal.

In a second possible implementation manner of the second aspect, the receiving station processes the signal carried by the target field, and determines the target field according to the processing result. Whether there are inversion features, including:

The receiving station divides the target field into a first data unit, a second data unit, and a third data unit according to a preset length;

The receiving station selects two data units from the first data unit, the second data unit, and the third data unit to perform signal combination processing according to the location of the preset data unit, to obtain a processing signal;

The receiving station determines, according to the processing signal, whether the target field has an inversion feature.

In a second possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, the receiving station, according to the location of the preset data unit, the first data unit, the Selecting two data units from the second data unit and the third data unit for signal combining processing to obtain a processing signal;

The receiving station selects two data units from the first data unit, the second data unit, and the third data unit, and the selected two data units include the preset data unit The data unit corresponding to the location;

The receiving station performs fast Fourier transform processing on the signals carried by the two data units to obtain a processed signal.

According to the third possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, the receiving station, according to the processing signal, determining whether the target field has a reverse feature, includes:

The receiving station separately calculates energy of the odd subcarriers of the processed signal and energy of the even subcarriers;

And if the difference between the energy of the even subcarrier and the energy of the odd subcarrier is greater than a preset threshold, the receiving station determines that the target field has an inversion feature.

In a second possible implementation manner of the second aspect, in a fifth possible implementation manner of the second aspect, the receiving station, according to the location of the preset data unit, the first data unit, the Selecting two data units from the second data unit and the third data unit for signal combining processing to obtain a processing signal;

The receiving station selects two first target data units from the first data unit, the second data unit, and the third data unit, where the first target data unit includes the preset data unit The corresponding data unit of the location;

The receiving station selects two second target data units from the first data unit, the second data unit, and the third data unit, and the second target data unit does not include the preset data. a data unit corresponding to the location of the unit;

The receiving station superimposes signals carried by the two first target data units to obtain a first processing signal;

The receiving station superimposes signals carried by the two second target data units to obtain a second processing signal.

According to the fifth possible implementation manner of the second aspect, in the sixth possible implementation manner of the second aspect, the receiving station, according to the processing signal, determining whether the target field has an inversion feature, includes:

And if the ratio between the first processed signal and the second processed signal is less than a preset threshold, the receiving station determines that the target field has an inversion feature.

A third aspect of the present invention provides a transmitting station, which is applied to an OFDM physical transmission system for orthogonal frequency division multiplexing, and includes:

An obtaining unit, configured to acquire a target signal for indicating a signal transmission characteristic and a standard category for encapsulating the target signal, the standard category including a first standard or a second standard;

a processing unit, configured to perform an inversion operation on the target signal if the standard category is a first criterion;

The processing unit is further configured to encapsulate the target signal after performing the inversion operation into a preset field of the first standard frame, to obtain the first standard frame having the inversion feature;

And a transceiver unit, configured to send the first standard frame with the inversion feature.

Based on the third aspect, in a first possible implementation manner of the third aspect, the first standard is an 802.11ay standard, and the second standard is an 802.11ad standard;

The preset field of the first standard frame is an EDMG-Header field.

A fourth aspect of the present invention provides a receiving station, which is applied to an OFDM physical transmission system for orthogonal frequency division multiplexing, and includes:

a transceiver unit, configured to receive a target frame;

a processing unit, configured to intercept a target field of the preset position in the target frame; and process a signal carried by the target field, and determine, according to the processing result, whether the inversion feature exists in the target field;

The processing unit is further configured to: if the inversion feature exists, determine that the target frame is a first standard frame; if there is no inversion feature, determine that the target frame is a second standard frame.

According to the fourth aspect, in a first possible implementation manner of the fourth aspect, the first standard frame is a preset that is encapsulated into the first standard frame by a transmitting station that supports the first standard, after the target signal is inverted. The frame structure formed in the field;

In a second possible implementation manner of the fourth aspect, the processing unit processes the signal carried by the target field, and determines the target field according to the processing result. Whether there are inversion features specifically include:

The processing unit divides the target field into a first data unit, a second data unit, and a third data unit according to a preset length;

The processing unit selects two data units from the first data unit, the second data unit, and the third data unit to perform signal combination processing according to the position of the preset data unit, to obtain a processing signal;

The processing unit determines, according to the processing signal, whether the target field has an inversion feature.

In a second possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the processing unit, according to the location of the preset data unit, from the first data unit, The second data unit and the third data unit are selected to perform signal combination processing, and the obtaining the processing signal specifically includes:

The processing unit selects two data units from the first data unit, the second data unit, and the third data unit, and the selected two data units include the preset data unit The data unit corresponding to the location;

The processing unit performs a fast Fourier transform process on the signals carried by the two data units to obtain a processed signal.

In a fourth possible implementation manner of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, the determining, by the processing unit, determining, according to the processing signal, whether the target field has an inversion feature, specifically:

The processing unit respectively calculates energy of odd subcarriers of the processed signal and energy of even subcarriers;

And if the difference between the energy of the even subcarrier and the energy of the odd subcarrier is greater than a preset threshold, the processing unit determines that the target field has an inversion feature.

In a second possible implementation manner of the fourth aspect, in a fifth possible implementation manner of the fourth aspect, the processing unit, according to the location of the preset data unit, from the first data unit, the Selecting two data units from the second data unit and the third data unit to perform signal combination processing, and obtaining the processed signal specifically includes:

The processing unit selects two first target data units from the first data unit, the second data unit, and the third data unit, the first target data unit including the preset data unit The corresponding data unit of the location;

The processing unit selects two second target data units from the first data unit, the second data unit, and the third data unit, and the second target data unit does not include the preset data a data unit corresponding to the location of the unit;

The processing unit superimposes signals carried by the two first target data units to obtain a first processing signal;

The processing unit superimposes the signals carried by the two second target data units to obtain a second processing signal.

Based on the fifth feasible implementation of the fourth aspect, the sixth feasible implementation manner in the fourth aspect The determining, by the processing unit, determining, according to the processing signal, whether the target field has an inversion feature, specifically includes:

And if the ratio between the first processed signal and the second processed signal is less than a preset threshold, the processing unit determines that the target field has an inversion feature.

In the embodiment of the present invention, in the OFDM physical transmission system, the transmitting station acquires the target signal and the standard category for encapsulating the target signal. If the standard category is the first standard, the target signal is reversed, and the inversion operation is performed. The target signal is encapsulated into a preset field of the first standard frame to obtain a first standard frame with a negated feature, and the transmitting station sends the first standard frame, so that the receiving station receives the target frame, and intercepts the preset in the target frame. The target field of the location processes the signal carried in the target field, and determines whether there is an inversion feature in the target field according to the processing result. If the inversion feature exists, the target frame is determined to be the first standard frame, if there is no inversion feature , the target frame is determined to be the second standard frame. In this way, the transmitting station can perform the inversion operation of the target signal in the first standard frame to realize the identification of the two standard frames by the receiving station.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be used in the embodiments will be briefly described below. Obviously, the drawings in the following description are only some of the present invention. For the embodiments, those skilled in the art can obtain other drawings according to the drawings without any creative work.

FIG. 1 is a schematic diagram of a system for a WLAN deployment scenario according to an embodiment of the present disclosure;

2 is a schematic flowchart of a signal processing method according to an embodiment of the present invention;

FIG. 3 is a schematic flowchart diagram of another signal processing method according to an embodiment of the present disclosure;

FIG. 4 is a schematic flowchart diagram of still another signal processing method according to an embodiment of the present disclosure;

FIG. 5 is a schematic flowchart diagram of still another signal processing method according to an embodiment of the present disclosure;

FIG. 6 is a schematic flowchart diagram of still another signal processing method according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of an 802.11ad frame according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of an 802.11ay frame according to an embodiment of the present disclosure;

FIG. 9 is a block diagram of EDMG-header processing in 802.11ay according to an embodiment of the present invention;

FIG. 10 is a flowchart of detecting an EDMG-header signal in 802.11ay according to an embodiment of the present invention;

FIG. 11 is a flowchart of another EDMG-header signal detection in 802.11ay according to an embodiment of the present invention;

FIG. 12 is a schematic structural diagram of a sending station according to an embodiment of the present invention;

FIG. 13 is a schematic structural diagram of a receiving station according to an embodiment of the present invention;

FIG. 14 is a schematic structural diagram of another sending station according to an embodiment of the present disclosure;

FIG. 15 is a schematic structural diagram of another receiving station according to an embodiment of the present invention.

detailed description

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, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The signal processing method of the embodiment of the present invention can be applied to a network supporting the 802.11ay protocol standard. In the network supporting the 802.11ay protocol standard, it can include devices that support the existing standard 802.11ad, and devices that support the newly introduced standard 802.11ay. The newly introduced standard 802.11ay meets backward compatibility, that is, the newly introduced standard 802.11. Ay's device can not only parse the frame structure of the 802.11ad protocol standard, but also not interfere with the original device. The signal processing method of the sending station in the embodiment of the present invention can be applied to signal processing when the 802.11ay device transmits data. The signal processing method of the receiving station in the embodiment of the present invention can be applied to the 802.11ad frame structure in the network when the 802.11ay device receives data. And the identification of the 802.11ay frame structure, so that the 802.11ay device satisfies the backward compatibility; the 802.11ay device can be either an access point (AP) in the WLAN network or a terminal station in the WLAN network.

As shown in FIG. 1 , it is a system schematic diagram of a typical WLAN deployment scenario, including an AP and multiple site STAs, where the access points communicate with stations STA1, STA2, and STA3, respectively. In this network, the AP is an 802.11ad device, or an 802.11ay device; the STA is an 802.11ad device, or an 802.11ay device. When the 802.11ay device sends data, the data is encapsulated into an 802.11ay frame according to the 802.11ay standard. In the embodiment of the present invention, in order to enable the receiving station to identify the 802.11ad frame and the 802.11ay frame, the 802.11ay device sends data in addition to the data package. In addition to the 802.11ay frame, it is also necessary to use a target signal for indicating a signal transmission characteristic according to the transmitting station of the embodiment of the present invention. The signal processing method is processed. When an 802.11ad device transmits data, the data is encapsulated into an 802.11ad frame according to the 802.11ad standard. When receiving the data sent by the 802.11ad device, the 802.11ad device can parse the frame structure according to the 802.11ad standard in the prior art standard; when the 802.11ad device receives the data sent by the 802.11ay device, the 802.11ad device cannot recognize the 802.11ay device. Therefore, it also does not recognize the 802.11ay frame sent by the 802.11ay device and is automatically in a sleep state. When receiving the target frame, the 802.11ay device can automatically identify the frame type of the target frame by using the signal processing method of the receiving station in the embodiment of the present invention. If the target frame is an 802.11ad frame, the 802.11ad according to the prior art is used. The target frame is parsed by the parsing method; if the target frame is an 802.11ay frame, the target frame is parsed according to the parsing method of 802.11ay.

The sending station in the embodiment of the present invention may be an 802.11ay-enabled AP in the network shown in FIG. 1 or an 802.11ay-enabled STA in the network, and the receiving station may be an 802.11ay-enabled AP in the network shown in FIG. It can be an STA that supports 802.11ay in the network.

The signal processing method provided by the embodiment of the present invention will be described and illustrated in conjunction with FIG. 2 to FIG.

2 is a schematic flowchart of a signal processing method according to an embodiment of the present invention; as shown in FIG. 2, the signal processing method includes:

S200. The sending station acquires a target signal for indicating a signal transmission characteristic and a standard category for encapsulating the target signal, where the standard category includes a first standard or a second standard;

In the embodiment of the present invention, the sending station may be an AP or an STA, and the sending station acquires a target signal for indicating a signal transmission characteristic, and the target signal enables the receiving station to perform signal detection according to the target signal. The transmitting station acquires a target signal and a standard category for encapsulating the target signal, and the standard category includes the first standard or the second standard. Specifically, the first standard may be the 802.11ay standard, and the second standard may be the 802.11ad standard.

It should be noted that if the transmitting station is an 802.11ad device, the encapsulation type of the target signal is 802.11ad standard. If the transmitting station is an 802.11ay device, the encapsulation type of the target signal is 802.11ay standard.

S201. If the standard category is the first criterion, the sending station performs an inversion operation on the target signal.

In the embodiment of the present invention, if the package type for encapsulating the target signal is the first standard, then sending The site reverses the target signal. The first standard can be the 802.11ay standard. That is, when the 802.11ay device encapsulates the target signal, the target signal needs to be reversed. When the 802.11ad device encapsulates the target signal, the 802.11ad device encapsulates the target signal. There is no need to reverse the target signal.

Specifically, the transmitting station may perform other operations on the target signal while performing the inverse operation on the target signal, as shown in FIG. 9 , that is, the operation performed by the transmitting station on the input target signal, firstly, the input 64-bit target signal. Perform the zero-padding operation, and then encode the target signal after the zero-padding operation. As shown in the figure, the encoded signal passes through three different signal processing modes, and the first signal is assumed to be a. The processing method is to punctify the encoded signal a (ie, remove the redundancy in the encoded signal a) to obtain the signal c1; the second signal processing method is to first punct the encoded signal a (the The punching method is the same as the punching in the first signal processing method, so the signal output after punching is the same as c1), and the signal after punching is XORed with the known sequence 1, and the XOR is The signal is reversed to obtain the signal -c2; the third signal processing method is to first punch the encoded signal a (the punching method is the same as the punching in the first signal processing mode, so the punching is performed C1 outputs the same signal), then the signal and the known puncturing XOR sequence 2, a signal c3. It can be seen from the above three different signal processing methods that the target signals are respectively encapsulated into the signals c1, -c2 and c3. The signals c1, -c2, and c3 respectively constitute three data units, wherein -c2 in the second data unit encapsulates the target signal after being inverted. The three data units (c1, -c2, c3) are DCM modulated.

S202, the sending station encapsulates the target signal after performing the inversion operation into a preset field of the first standard frame, to obtain the first standard frame with the inversion feature;

In the embodiment of the present invention, the sending station encapsulates the target signal after the inversion operation into the preset field of the first standard frame, and obtains the first standard frame with the inverted feature. The first standard frame may be an 802.11ay frame, and the preset field of the first standard frame may be an Enhanced Directional Multi Gigabit Header (EDMG-Header), as shown in FIG. 8 , that is, 802.11ay A frame structure diagram of a frame, which includes the following fields: a short training field (STF), a channel estimation (CE), a header signal Header, an EDMG-Header, and a data Data. Compared with the frame structure of the 802.11ad frame in FIG. 7, the 802.11ad frame structure also includes the fields STF, CE, and Header. The three fields are the same in the two frame structures, and the 802.11ay frame is different from the 802.11ad frame structure. , the field Header in the 802.11ad frame Between the field Data, the EDMG-Header field is inserted, which is used to describe the transmission characteristics of the signal in the 802.11ay standard. In the embodiment of the present invention, at the receiving station, the difference between the signal in the EDMG-Header field of the 802.11ay frame and the data field signal of the 802.11ad frame is used to identify the two frames. The specific identification manner can be identified by referring to the description of the embodiment of FIG. 3.

Continuing with the above three data units (c1, -c2, c3) as an example, the 802.11ay device encapsulates the three data units into the EDMG-Header field.

S203. The sending station sends the first standard frame with a negation feature.

In the embodiment of the present invention, the sending station sends the first standard frame with the inversion feature, and the first standard frame may be an 802.11ay frame, that is, the frame structure of the package shown in FIG. 8 is transmitted by 802.11ay, and the frame structure of the EDMG- The header signal contains a target signal with a negated feature. It should be noted that the sending station may be an AP supporting 802.11ay or an STA supporting 802.11ay.

FIG. 3 is a schematic flowchart diagram of another signal processing method according to an embodiment of the present invention; as shown in FIG. 3, the signal processing method includes:

S300. The receiving station receives the target frame, and intercepts a target field of the preset position in the target frame.

In the embodiment of the present invention, the receiving station may be an AP supporting 802.11ay or an STA supporting 802.11ay. When receiving the target frame, the receiving station needs to identify the frame type of the target frame, that is, whether the target frame is the first standard frame or the second standard frame. Specifically, the first standard frame may be 802.11. Ay, the second standard frame may be an 802.11ad frame.

In a specific embodiment, after receiving the target frame, the receiving station intercepts the target field of the preset position in the target frame, and the preset position may be determined according to a specific frame encapsulation manner of the sending station, for example, if the receiving station is 802.11ay And the 802.11ad frame is identified, according to the 802.11ay sending station is the target signal carried in the EDMG-Header field to perform the inversion operation, and the Data field corresponding to the same position of the 802.11ad frame structure is not reversed, so The preset position is the target field after the Header field in the target frame. If the target frame is an 802.11ay frame, the intercepted target field is an EDMG-Header field, and the target signal in the target field is reversed. If the target frame is an 802.11ad frame, the intercepted target field is a Data field, and the signal carried in the field is not reversed.

S301. The receiving station processes a signal carried in the target field, and determines, according to the processing result, whether an inversion feature exists in the target field.

In the embodiment of the present invention, the receiving station processes the signal carried in the intercepted target field, and determines whether there is an inversion feature in the target field according to the processing result. Continuing with the above 802.11ay and 802.11ad frame identification as an example, the target signal carried in the EDMG-Header field of 802.11ay is reversed, and the Data field of 802.11ad is not reversed, so the receiving station It is only necessary to judge whether the target field intercepted has an inversion feature. If there is an inversion feature, the target frame is an 802.11ay frame, and if there is no inversion feature, the target frame is an 802.11ad frame.

Specifically, the determining method for determining whether the target field has the inversion feature may be determined according to the encapsulation manner of the target signal by the 802.11ay transmitting station, as shown in the embodiment in FIG. 2, the EDMG-Header of the 802.11ay frame. The field includes three data units, and the preset data unit (the second data unit in the embodiment of FIG. 2) encapsulates the target signal after being inverted, and the other two data units respectively encapsulate the target The target signal.

As an optional implementation manner, the target field is divided into three data units according to the length of the preset data unit, and then each data unit is decapsulated according to the encapsulation manner of the sending station, and then the first data unit is used. The carried signal and the signal carried by the second data unit are subjected to Fast Fourier Transformation (FFT). Since the FFT of the same signal in the FFT transform, the energy of the signal is mainly distributed on the odd subcarriers, and the antisymmetric is taken. After the signal is FFT, the signal energy is mainly distributed on the even subcarriers, so if the signal carried by the first data unit and the second data sheet After the signal carried by the element is FFT, the signal energy is mainly distributed on the even subcarriers, indicating that the signal carried by the first data unit and the signal carried by the second data unit are taken as antisymmetric signals, that is, the target frame is 802.11ay. Frame, otherwise the target frame is an 802.11ad frame. It should be noted that the receiving station may also perform FFT on the signal carried by the second data unit and the signal carried in the third data unit, and perform FFT on the signal carried by the second data unit and the signal carried in the third data unit. After that, the signal energy is mainly distributed on the even subcarriers, indicating that the signal carried by the second data unit and the signal carried by the third data unit are the antisymmetric signals, that is, the target frame is an 802.11ay frame, otherwise the target frame is For 802.11ad frames.

As another optional implementation manner, the target field is divided into three data units according to the length of the preset data unit, and then each data unit is decapsulated according to the encapsulation manner of the sending station, and then the first data is The signal carried by the unit is superimposed with the signal carried by the second data unit to obtain a first processing signal, and the signal carried by the first data unit is superimposed with the signal carried by the third data unit to obtain a second processed signal. If the first processed signal is much smaller than the second processed signal, the target frame is an 802.11ay frame, otherwise the target frame is an 802.11ad frame. Because the 802.11ay device sends the 802.11ay frame, the target signal carried by the second data unit is reversed. Therefore, if it is an 802.11ay frame, the signal carried by the first data unit and the second data unit are carried. The signal is superimposed to be almost zero. The signal carried by the first data unit and the signal carried by the third data unit are superimposed to a larger value; if it is an 802.11ad frame, the signal carried by the first data unit and the first The signals superimposed by the signals carried by the two data units are equivalent to the signals carried by the first data unit and the signals carried by the third data unit, which is due to the Data field itself.

S302. If there is an inversion feature, the receiving station determines that the target frame is a first standard frame.

In the embodiment of the present invention, if it is detected that the target frame has an inversion feature, the target frame is a first standard frame, and the first standard frame may be an 802.11ay frame, because the 802.11ay device sends a frame structure to the frame. The target signal in the EDMG-Header field in the structure is reversed.

S303. If there is no inversion feature, the receiving station determines that the target frame is a second standard frame.

In the embodiment of the present invention, if it is detected that the target frame does not have an inversion feature, the target frame is a second standard frame, and the second standard frame may be an 802.11ad frame, because the 802.11ad device does not send the frame structure. Invert the signal in the Data field in the frame structure.

Referring to FIG. 4, a schematic flowchart of still another signal processing method according to an embodiment of the present invention; as shown in FIG. 4, the signal processing method includes:

S400. The receiving station receives the target frame, and intercepts a target field of the preset position in the target frame.

For the step S400 of the embodiment of the present invention, refer to the step S300 of the embodiment of FIG. 3, and details are not described herein again.

S401. The receiving station divides the target field into a first data unit, a second data unit, and a third data unit according to a preset length.

In the embodiment of the present invention, after receiving the target field of the preset position of the target frame, the receiving station divides the target field into the first data unit, the second data unit, and the third data unit according to the preset length. It should be noted that, as shown in FIG. 10, before the target frame is divided, the DCM soft demodulation of the signal in the target frame may be performed corresponding to the DCM modulation operation of the transmitting station in FIG. 9, and then according to FIG. 9 ( The length of each data unit in c1, -c2, c3) divides the signal in the target frame after soft demodulation into three data units.

S402. The receiving station selects two data units from the first data unit, the second data unit, and the third data unit according to the location of the preset data unit, and performs signal combination processing to obtain processing. signal;

In the embodiment of the present invention, the transmitting station supporting the first standard encapsulates the inverted target signal into a preset data unit of the preset field when the target signal is encapsulated, and the other two of the preset fields. The data unit is encapsulated with a target signal that is not inverted. Therefore, corresponding to the receiving station analyzing the received target frame, according to the location of the preset data unit, from the first data unit, Two data units are selected from the second data unit and the third data unit for signal combining processing to obtain a processed signal.

As an optional implementation manner, if the FFT is performed by using the signal carried by the selected two data units to determine whether it is the first standard frame, the selected two data units are respectively associated with the preset data unit. The data unit corresponding to the location and any one of the other two data units. Specifically, if the preset data unit is the second data unit, the selected data unit may be the first data unit and the second The data unit may also be a second data unit and a third data unit. The signal carried by the selected two data units is then subjected to FFT to obtain a processed signal.

As another optional implementation manner, if the signal is superimposed to determine whether it is the first standard frame, two first target data units need to be selected (one of the two first target data units and one of the data units) The position of the preset data unit corresponds to), and then two second target data units are selected (any one of the two second target data does not correspond to the position of the preset data unit). The signals carried by the two first target data units are superimposed to obtain a first processed signal, and the signals carried by the two second target data units are superimposed to obtain a second processed signal.

S403. The receiving station determines, according to the processing signal, whether the target field has an inversion feature.

In the embodiment of the present invention, the receiving station determines whether the target field has an inversion feature according to the obtained processing signal.

Specifically, the determining method for determining whether the target field has an inversion feature according to the processing signal according to the processing signal may have the following two optional implementation manners:

In the first optional implementation, if the signal carried by the selected two data units is FFT and the processed signal is obtained, it is determined whether the energy of the even subcarriers of the processed signal is much larger than that of the odd subcarriers. The energy, if yes, determines that the signals carried by the two data units are anti-symmetric, that is, the target field has an inverse feature.

In a second optional implementation manner, if the signals carried by the two first target data units are superimposed, the first processed signal is obtained, and the signals carried by the two second target data units are superimposed to obtain the first Second, the signal is processed. Then comparing the first processed signal with the second processed signal, if the first processed signal is much smaller than the second processed signal, it indicates that the signal carried by the two data units is antisymmetric, that is, the target field is inverted. feature. If the first processed signal is equal to the second processed signal, It means that there is no inversion feature in the target field.

S404. If there is an inversion feature, the receiving station determines that the target frame is a first standard frame.

S405. If there is no inversion feature, the receiving station determines that the target frame is a second standard frame.

For the steps S404-S405 of the embodiment of the present invention, refer to steps S302-S303 of the embodiment of FIG. 3, and details are not described herein again.

In the embodiment of the present invention, in the OFDM physical transmission system, the transmitting station acquires the target signal and the standard category for encapsulating the target signal. If the standard category is the first standard, the target signal is reversed, and the inversion operation is performed. The target signal is encapsulated into a preset field of the first standard frame to obtain a first standard frame with a negated feature, and the transmitting station sends the first standard frame, so that the receiving station receives the target frame, and intercepts the preset in the target frame. The target field of the location processes the signal carried in the target field, and determines whether there is an inversion feature in the target field according to the processing result. If the inversion feature exists, the target frame is determined to be the first standard frame, if there is no inversion feature , the target frame is determined to be the second standard frame. In this way, the transmitting station can perform the inversion of the target signal in a standard frame to realize the identification of the two standard frames by the receiving station.

5 is a schematic flowchart of still another signal processing method according to an embodiment of the present invention; as shown in FIG. 5, the signal processing method includes:

S500. The receiving station receives the target frame, and intercepts a target field of the preset position in the target frame.

S501. The receiving station divides the target field into a first data unit, a second data unit, and a third data unit according to a preset length.

For the steps S500-S501 of the embodiment of the present invention, refer to the steps S400-S401 of the embodiment of FIG. 4, and details are not described herein again.

S502. The receiving station selects two data units from the first data unit, the second data unit, and the third data unit, where the selected two data units include the preset data. a data unit corresponding to the location of the unit;

In an embodiment of the present invention, the receiving station selects two data units from the divided first data unit, the second data unit, and the third data unit, where the selected two data units include a location with a preset data unit. Corresponding data unit. The device supporting the first standard presets the data unit in the preset field to encapsulate the inverted target signal when transmitting the frame structure, so whether the target frame is detected at the receiving station When the first standard frame is selected, when two data units are selected from the divided three data units, the selected two data units include data units corresponding to the positions of the preset data units.

Here, the first standard is 802.11ay, and the second standard is 802.11ad as an example. Referring to FIG. 10, the signal of the target frame is DCM demodulated and divided into three data units, which are corresponding to the sending in FIG. The processing of the signals of the respective data units by the station, the signals of the divided three data units are inversely processed in FIG. 10, but the difference from FIG. 9 is that the signals carried by the second data unit are inversed in FIG. When it was processed, it was not reversed. In FIG. 10, the signal carried by the first data unit after the inverse processing and the signal carried by the second data unit after the inverse processing are selected. It should be noted that, if the target frame is an 802.11ay frame, since it is the inverse processing of FIG. 9, before the FFT conversion, the output signal llr value of the three data units after inverse processing is the signal encoded by the three signals of FIG. The values are the same, except that the output signal after the inverse processing of the second data unit in FIG. 10 is inverted.

S503. The receiving station performs fast Fourier transform processing on the signals carried by the two data units to obtain a processing signal.

In the embodiment of the present invention, the receiving station performs FFT processing on the signals carried by the selected two data units to obtain a processing signal. As shown in FIG. 10, the signal carried by the first data unit is inversely processed and the second data unit is carried. The signal carried after the inverse processing is subjected to FFT to obtain a processed signal.

S504. The receiving station separately calculates energy of an odd subcarrier of the processed signal and energy of an even subcarrier.

In the embodiment of the present invention, the receiving station separately calculates the energy of the odd subcarriers of the processed signal and the energy of the even subcarriers. In the FFT transform, the energy of the FFT signal of the same signal is mainly distributed on the odd subcarriers, and the energy of the signal after the symmetrically inverted signal FFT is mainly distributed on the even subcarriers. Therefore, the embodiment of the present invention mainly adopts the characteristic of the FFT. Detection of inversion features.

S505. If the difference between the energy of the even subcarrier and the energy of the odd subcarrier is greater than a preset threshold, the receiving station determines that the target field has an inversion feature.

In the embodiment of the present invention, if the difference between the energy of the even subcarriers and the energy of the odd subcarriers is greater than a preset threshold, the energy is mainly distributed on the even subcarriers after the FFT transform, indicating that the target field has an inversion feature.

S506. If there is an inversion feature, the receiving station determines that the target frame is a first standard frame.

S507. If there is no inversion feature, the receiving station determines that the target frame is a second standard frame.

For the steps S506-S507 of the embodiment of the present invention, refer to steps S302-S303 of the embodiment of FIG. 3, and details are not described herein again.

Referring to FIG. 6, a schematic flowchart of still another signal processing method according to an embodiment of the present invention; as shown in FIG. 6, the signal processing method includes:

S600. The receiving station receives the target frame, and intercepts a target field of the preset position in the target frame.

S601. The receiving station divides the target field into a first data unit, a second data unit, and a third data unit according to a preset length.

For the steps S600-S601 of the embodiment of the present invention, refer to the steps S400-S401 of the embodiment of FIG. 4, and details are not described herein again.

S602. The receiving station selects two first target data units from the first data unit, the second data unit, and the third data unit, where the first target data unit includes the preset. a data unit corresponding to the location of the data unit;

In the embodiment of the present invention, the receiving station selects two first target data units from the divided first data unit, the second data unit, and the third data unit, where the selected two first target data units include The data unit corresponding to the location of the preset data unit. The device supporting the first standard presets the data unit in the preset field to encapsulate the inverted target signal when transmitting the frame structure, so when the receiving station detects whether the target frame is the first standard frame, the three divided from the three When two first target data units are selected in the data unit, the selected two data units include numbers corresponding to the positions of the preset data units According to the unit.

Here, the first standard is 802.11ay, and the second standard is 802.11ad as an example. Referring to FIG. 11, the signal of the target frame is demodulated by DCM and divided into three data units, which are corresponding to the sending in FIG. The processing of the signals of the respective data units by the station, the signals of the three divided data units are inversely processed in FIG. 11, but the difference from FIG. 9 is that the signals carried by the second data unit are reversed in FIG. When it was processed, it was not reversed. In FIG. 11, the signal carried by the first data unit after the inverse processing and the signal carried by the second data unit after the inverse processing are selected. It should be noted that if the target frame is an 802.11ay frame, since it is the inverse processing of FIG. 9, before the signal is superimposed, the output signal llr value of the three data units after inverse processing is the signal encoded by the three signals of FIG. The values are the same, except that the output signal after the inverse processing of the second data unit in Figure 11 is inverted.

S603. The receiving station selects two second target data units from the first data unit, the second data unit, and the third data unit, where the second target data unit does not include the Setting a data unit corresponding to the location of the data unit;

In the embodiment of the present invention, the receiving station selects two second target data units from the first data unit, the second data unit, and the third data unit, and the two second target data units do not include the location corresponding to the preset data unit. The data unit, as shown in FIG. 11, the selected two second target data units are a first data unit and a third data unit, respectively.

S604. The receiving station superimposes signals carried by the two first target data units to obtain a first processing signal.

In the embodiment of the present invention, the signals carried by the selected two first target data units are superimposed to obtain a first processing signal, as shown in FIG. 11, corresponding to the processing of the target signal by the 802.11ay transmitting station in FIG. In FIG. 11, the signals of the first data unit, the second data unit, and the third data unit are inversely processed. If the target frame is an 802.11ay frame, the first processing after the signals carried by the two first target data units are superimposed The signal is almost zero because the signals carried by the two first target data units are antisymmetric. If the target frame is an 802.11ad frame, the feature is not available.

S605. The receiving station superimposes signals carried by the two second target data units to obtain a second processing signal.

In the embodiment of the present invention, the signals carried by the selected two second target data units are stacked Adding, obtaining the second processing signal, as shown in FIG. 11, corresponding to the processing of the target signal by the 802.11ay transmitting station in FIG. 9, and performing the signals of the first data unit, the second data unit, and the third data unit in FIG. Inverse processing, then the signal carried by the first data unit and the signal carried by the third data unit are superimposed to obtain a second processed signal.

S606. If the ratio between the first processing signal and the second processing signal is less than a preset threshold, the receiving station determines that the target field has an inversion feature.

In the embodiment of the present invention, the first processed signal and the second processed signal are compared. If the ratio between the first processed signal and the second processed signal is less than a preset threshold, the receiving station determines that the target field has an inversion feature. Here, the first standard is 802.11ay, and the second standard is 802.11ad as an example. If the frame is an 802.11ay frame, the first processed signal is almost zero, and the second processed signal is large, and if the frame is In the 802.11ad frame, the first processed signal is equivalent to the second processed signal, so the ratio between the first processed signal and the second processed signal can be utilized to determine whether it is an 802.11ay frame.

S607. If there is an inversion feature, the receiving station determines that the target frame is a first standard frame.

S608. If there is no inversion feature, the receiving station determines that the target frame is a second standard frame.

For the steps S607-S608 of the embodiment of the present invention, refer to the steps S302-S303 of the embodiment of FIG. 3, and details are not described herein again.

The specific implementation of the sending station and the receiving station provided by the embodiment of the present invention is described below with reference to FIG. 12 to FIG.

Please refer to FIG. 12, which is a schematic structural diagram of a sending station according to an embodiment of the present invention. As shown in FIG. 12, a transmitting station according to this embodiment includes: an obtaining unit 100, a processing unit 101, and a transceiver unit 102.

The obtaining unit 100 is configured to acquire a target signal for indicating a signal transmission characteristic and a standard category for encapsulating the target signal, where the standard category includes a first standard or a second standard;

In the embodiment of the present invention, the sending station may be an AP or an STA, and the sending station acquiring unit 100 acquires a target signal for indicating a signal transmission characteristic, and the target signal enables the receiving station to perform signal detection according to the target signal. The transmitting station acquires a target signal and a standard category for encapsulating the target signal, and the standard category includes the first standard or the second standard. Specifically, the first standard may be the 802.11ay standard, and the second standard may be the 802.11ad standard.

The processing unit 101 is configured to perform an inverse operation on the target signal if the standard category is a first criterion;

In the embodiment of the present invention, if the package type of the target signal is the first standard, the processing unit 101 sends the site to perform the inverse operation on the target signal, and the first standard may be the 802.11ay standard, that is, the 802.11ay device is in the pair. When the target signal is encapsulated, the target signal needs to be reversed. When the target signal is encapsulated, the 802.11ad device does not need to reverse the target signal.

Specifically, the transmitting station may perform other operations on the target signal while performing the inverse operation on the target signal, as shown in FIG. 9 , that is, the operation performed by the transmitting station on the input target signal, firstly, the input 64-bit target signal. Perform the zero-padding operation, and then encode the target signal after the zero-padding operation. As shown in the figure, the encoded signal passes through three different signal processing modes, and the first signal is assumed to be a. The processing method is to punctify the encoded signal a (ie, remove the redundancy in the encoded signal a) to obtain the signal c1; the second signal processing method is to first punct the encoded signal a (the The punching method is the same as the punching in the first signal processing method, so the signal output after punching is the same as c1), and the signal after punching is XORed with the known sequence 1, and the XOR is The signal is reversed to obtain the signal -c2; the third signal processing method is to first punch the encoded signal a (the punching method is the same as the punching in the first signal processing mode, so the punching is performed C1 outputs the same signal), the signal and the known sequence and then puncturing 2 XOR, obtaining signal c3. It can be seen from the above three different signal processing methods that the target signals are respectively encapsulated into the signals c1, -c2 and c3. The signals c1, -c2, and c3 respectively constitute three data units, wherein -c2 in the second data unit encapsulates the target signal after being inverted. The three data units (c1, -c2, c3) are DCM modulated.

The processing unit 101 is further configured to encapsulate the target signal after performing the inversion operation into a preset field of the first standard frame, to obtain the first standard frame with the inversion feature;

In the embodiment of the present invention, the sending station processing unit 101 encapsulates the target signal after the inversion operation into the preset field of the first standard frame, and obtains the first standard frame with the inverted feature. The first standard frame may be an 802.11ay frame, and the preset field of the first standard frame may be an Enhanced Directional Multi Gigabit Header (EDMG-Header), as shown in FIG. 8 , that is, 802.11ay A frame structure diagram of a frame, which includes the following fields: a short training field (STF), a channel estimation (CE), a header signal Header, an EDMG-Header, and a data Data. Compared with the frame structure of the 802.11ad frame in FIG. 7, the 802.11ad frame structure also includes the fields STF, CE, and Header. The three fields are the same in the two frame structures, and the 802.11ay frame is different from the 802.11ad frame structure. Between the field Header of the 802.11ad frame and the field Data, an EDMG-Header field is inserted, which is used to describe the transmission characteristics of the signal in the 802.11ay standard. In the embodiment of the present invention, at the receiving station, the difference between the signal in the EDMG-Header field of the 802.11ay frame and the data field signal of the 802.11ad frame is used to identify the two frames. The specific identification manner can be identified by referring to the description of the embodiment of FIG. 3.

The transceiver unit 102 is configured to send the first standard frame with the inversion feature.

In the embodiment of the present invention, the sending station transceiver unit 102 sends the first standard frame with the inversion feature, and the first standard frame may be an 802.11ay frame, that is, the frame structure of the package shown in FIG. 8 is transmitted by 802.11ay, and the frame structure is The EDMG-Header field contains a target signal with a negated feature. It should be noted that the sending station may be an AP supporting 802.11ay or an STA supporting 802.11ay.

In the embodiment of the present invention, in the OFDM physical transmission system, the transmitting station acquires the target signal to And a standard category for encapsulating the target signal. If the standard category is the first standard, the target signal is reversed, and the target signal after the inversion operation is encapsulated into a preset field of the first standard frame, and the obtained The first standard frame of the inverse feature, the sending station sends the first standard frame, so that the receiving station receives the target frame, and intercepts the target field of the preset position in the target frame, processes the signal carried in the target field, and according to the processing result Determining whether there is an inversion feature in the target field. If there is an inversion feature, determining that the target frame is the first standard frame, and if there is no inversion feature, determining that the target frame is the second standard frame. In this way, the transmitting station can perform the inversion of the target signal in a standard frame to realize the identification of the two standard frames by the receiving station.

FIG. 13 is a schematic structural diagram of a receiving station according to an embodiment of the present invention. As shown in FIG. 13, a receiving station according to this embodiment includes: a transceiver unit 200 and a processing unit 201.

The transceiver unit 200 is configured to receive a target frame.

The processing unit 201 is configured to intercept a target field of the preset position in the target frame, and process the signal carried in the target field, and determine, according to the processing result, whether the target field has an inversion feature;

The processing unit 201 is further configured to: if there is an inversion feature, the receiving station determines that the target frame is a first standard frame;

The processing unit 201 is further configured to: if there is no inversion feature, the receiving station determines that the target frame is a second standard frame.

In a specific embodiment, after receiving the target frame, the processing unit 201 intercepts the target field of the preset position in the target frame, and the preset position may be determined according to a specific frame encapsulation manner of the sending station, for example, if the receiving station is The 802.11ay and 802.11ad frames are identified, and the 802.11ay transmitting station performs the inversion operation according to the target signal carried in the EDMG-Header field, and the Data field corresponding to the same position of the 802.11ad frame structure is not reversed. Processing, so the preset position is the target field after the Header field in the target frame. If the target frame is an 802.11ay frame, the intercepted The target field is the EDMG-Header field, and the target signal in the target field is reversed. If the target frame is an 802.11ad frame, the intercepted target field is a Data field, and the signal carried in the field is not reversed.

The receiving station processes the signal carried in the intercepted target field, and determines whether there is an inversion feature in the target field according to the processing result. Continuing with the above 802.11ay and 802.11ad frame identification as an example, the target signal carried in the EDMG-Header field of 802.11ay is reversed, and the Data field of 802.11ad is not reversed, so the receiving station It is only necessary to judge whether the target field intercepted has an inversion feature. If there is an inversion feature, the target frame is an 802.11ay frame, and if there is no inversion feature, the target frame is an 802.11ad frame.

As an optional implementation manner, the target field is divided into three data units according to the length of the preset data unit, and then each data unit is decapsulated according to the encapsulation manner of the sending station, and then the first data unit is used. The carried signal and the signal carried by the second data unit are subjected to Fast Fourier Transformation (FFT). Since the FFT of the same signal in the FFT transform, the energy of the signal is mainly distributed on the odd subcarriers, and the antisymmetric is taken. After the signal is FFT, the signal energy is mainly distributed on the even subcarriers. Therefore, if the signal carried by the first data unit and the signal carried by the second data unit are FFT, the signal energy is mainly distributed on the even subcarriers, indicating that the first The signal carried by the data unit and the signal carried by the second data unit are the anti-symmetric signals, that is, the target frame is an 802.11ay frame, otherwise the target frame is an 802.11ad frame. It should be noted that the receiving station may also perform FFT on the signal carried by the second data unit and the signal carried in the third data unit, and perform FFT on the signal carried by the second data unit and the signal carried in the third data unit. After that, the signal energy is mainly distributed on the even subcarriers, indicating that the signal carried by the second data unit and the signal carried by the third data unit are the antisymmetric signals, that is, the target frame is an 802.11ay frame, otherwise the target frame is For 802.11ad frames.

As another optional implementation manner, the target field is marked according to the length of the preset data unit. Divided into three data units, and then decapsulating each data unit according to the encapsulation manner of the transmitting station, and then superimposing the signal carried by the first data unit with the signal carried by the second data unit to obtain the first processing signal. The signal carried by the first data unit is superimposed with the signal carried by the third data unit to obtain a second processed signal. If the first processed signal is much smaller than the second processed signal, the target frame is an 802.11ay frame, otherwise the target frame is an 802.11ad frame. Because the 802.11ay device sends the 802.11ay frame, the target signal carried by the second data unit is reversed. Therefore, if it is an 802.11ay frame, the signal carried by the first data unit and the second data unit are carried. The signal is superimposed to be almost zero. The signal carried by the first data unit and the signal carried by the third data unit are superimposed to a larger value; if it is an 802.11ad frame, the signal carried by the first data unit and the first The signals superimposed by the signals carried by the two data units are equivalent to the signals carried by the first data unit and the signals carried by the third data unit, which is due to the Data field itself.

Optionally, the processing unit 201 processes the signal carried in the target field, and determines whether the inversion feature exists in the target field according to the processing result, and specifically includes:

The processing unit 201 divides the target field into a first data unit, a second data unit, and a third data unit according to a preset length;

In the embodiment of the present invention, after the receiving station intercepts the target field of the preset position of the target frame, the processing unit 201 divides the target field into the first data unit, the second data unit, and the third data unit according to the preset length. It should be noted that, as shown in FIG. 10, before the target frame is divided, the DCM soft demodulation of the signal in the target frame may be performed corresponding to the DCM modulation operation of the transmitting station in FIG. 9, and then according to FIG. 9 ( The length of each data unit in c1, -c2, c3) divides the signal in the target frame after soft demodulation into three data units.

The processing unit 201, according to the location of the preset data unit, from the first data unit, Selecting two data units from the second data unit and the third data unit for signal combination processing to obtain a processing signal;

In the embodiment of the present invention, the transmitting station supporting the first standard encapsulates the inverted target signal into a preset data unit of the preset field when the target signal is encapsulated, and the other two of the preset fields. The data unit is encapsulated with a target signal that is not inverted. Therefore, when the receiving station analyzes the received target frame, the processing unit 201 selects two data units from the first data unit, the second data unit, and the third data unit to perform signals according to the position of the preset data unit. Combine processing to obtain a processed signal.

As an optional implementation manner, the processing unit 201 selects two data from the first data unit, the second data unit, and the third data unit according to the location of the preset data unit. The unit performs signal combination processing, and the obtained processing signal specifically includes:

The processing unit 201 selects two data units from the first data unit, the second data unit, and the third data unit, and the selected two data units include the preset data unit The corresponding data unit of the location;

In the embodiment of the present invention, the receiving station processing unit 201 selects two data units from the divided first data unit, the second data unit, and the third data unit, and the selected two data units include the preset data. The data unit corresponding to the location of the unit. Devices supporting the first standard are sending frame knots The preset data unit encapsulates the inverted target signal in the preset field, so when the receiving station detects whether the target frame is the first standard frame, when two data units are selected from the three divided data units The selected two data units include data units corresponding to the locations of the preset data units.

The processing unit 201 performs fast Fourier transform processing on the signals carried by the two data units to obtain a processed signal.

In the embodiment of the present invention, the receiving station processing unit 20 performs FFT processing on the signals carried by the selected two data units to obtain a processing signal. As shown in FIG. 10, the signal carried by the first data unit is inversely processed. The signal carried by the two data units after the inverse processing is subjected to FFT to obtain a processed signal.

As another optional implementation manner, the processing unit 201 selects two of the first data unit, the second data unit, and the third data unit according to the location of the preset data unit. The data unit performs signal combination processing, and the obtained processing signal specifically includes:

The processing unit 201 selects two first target data units from the first data unit, the second data unit, and the third data unit, where the first target data unit includes the preset data a data unit corresponding to the location of the unit;

In the embodiment of the present invention, the receiving station processing unit 201 selects two first target data units from the divided first data unit, the second data unit, and the third data unit, and the selected two first target data units A data unit corresponding to the location of the preset data unit is included. The device supporting the first standard presets the data unit in the preset field to encapsulate the inverted target signal when transmitting the frame structure, because When the receiving station detects whether the target frame is the first standard frame, when two first target data units are selected from the three divided data units, the selected two data units include the position with the preset data unit. Corresponding data unit.

The processing unit 201 selects two second target data units from the first data unit, the second data unit, and the third data unit, and the second target data unit does not include the preset a data unit corresponding to the location of the data unit;

In the embodiment of the present invention, the receiving station processing unit 201 selects two second target data units from the first data unit, the second data unit, and the third data unit, and the two second target data units do not include the preset data unit. The corresponding data unit of the position, as shown in FIG. 11, the selected two second target data units are the first data unit and the third data unit, respectively.

The processing unit 201 superimposes the signals carried by the two first target data units to obtain a first processing signal;

In the embodiment of the present invention, the processing unit 201 superimposes the signals carried by the selected two first target data units to obtain a first processing signal, as shown in FIG. 11 , corresponding to the 802.11ay transmitting station to target signal in FIG. 9 . The processing of the first data unit, the second data unit, and the third data unit is inversely processed in FIG. 11. If the target frame is an 802.11ay frame, the signals carried by the two first target data units are superimposed. The first processed signal is almost zero because the signals carried by the two first target data units are antisymmetric. If the target frame is an 802.11ad frame, the feature is not available.

The processing unit 201 superimposes the signals carried by the two second target data units to obtain the first Second, the signal is processed.

In the embodiment of the present invention, the processing unit 201 superimposes the signals carried by the selected two second target data units to obtain a second processing signal, as shown in FIG. 11 , corresponding to the 802.11ay transmitting station to target signal in FIG. 9 . Processing, the signals of the first data unit, the second data unit, and the third data unit are inversely processed in FIG. 11, and then the signal carried by the first data unit and the signal carried by the third data unit are superimposed to obtain a second process. signal.

The processing unit 201 determines, according to the processing signal, whether the target field has an inversion feature.

Optionally, the determining, by the processing unit 201, whether the target field has an inversion feature according to the processing signal, specifically includes:

The processing unit 201 respectively calculates the energy of the odd subcarriers of the processed signal and the energy of the even subcarriers;

In the embodiment of the present invention, the receiving station processing unit 201 respectively calculates the energy of the odd subcarriers of the processed signal and the energy of the even subcarriers. In the FFT transform, the energy of the FFT signal of the same signal is mainly distributed on the odd subcarriers, and the energy of the signal after the symmetrically inverted signal FFT is mainly distributed on the even subcarriers. Therefore, the embodiment of the present invention mainly adopts the characteristic of the FFT. Detection of inversion features.

If the difference between the energy of the even subcarriers and the energy of the odd subcarriers is greater than a preset threshold, the processing unit 201 determines that the target field has an inversion feature.

If the ratio between the first processed signal and the second processed signal is less than a preset threshold, the processing unit 201 determines that the target field has an inversion feature.

In the embodiment of the present invention, the processing unit 201 compares the first processed signal and the second processed signal. If the ratio between the first processed signal and the second processed signal is less than a preset threshold, the receiving station determines that the target field is inverted. feature. Here, the first standard is 802.11ay, and the second standard is 802.11ad as an example. If the frame is an 802.11ay frame, the first processed signal is almost zero, and the second processed signal is large, and if the frame is In the 802.11ad frame, the first processed signal is equivalent to the second processed signal, so the ratio between the first processed signal and the second processed signal can be utilized to determine whether it is an 802.11ay frame.

FIG. 14 is a schematic structural diagram of another sending station according to an embodiment of the present invention. In the embodiment of FIG. 14, the transmitting station 30 includes an antenna 301, a transmitter 302, a receiver 303, a processor 304, and a memory 305. Processor 304 controls the operation of transmitting station 30 and can be used to process signals. Memory 305 can include read only memory and random access memory and provides instructions and data to processor 304. Transmitter 302 and receiver 303 can be coupled to antenna 301. The various components of station 30 are coupled together by a bus system 306, which in addition to the data bus includes a power bus, a control bus, and a status signal bus. However, for clarity of description, various buses are labeled as bus system 306 in the figure. For example, the transmitting site 30 can be the STA or AP shown in FIG.

Specifically, the memory 305 can store instructions to perform the following process:

Optionally, in the embodiment of the present invention, the sending station may be an AP or an STA, and the sending station acquires a target signal for indicating a signal transmission characteristic, and the target signal enables the receiving station to The signal is signaled. The transmitting station acquires a target signal and a standard category for encapsulating the target signal, and the standard category includes the first standard or the second standard. Specifically, the first standard may be the 802.11ay standard, and the second standard may be the 802.11ad standard.

Optionally, if the package type of the target signal is the first standard, the sending station performs the inverse operation on the target signal, and the first standard may be the 802.11ay standard, that is, the 802.11ay device encapsulates the target signal. The target signal needs to be reversed. When the 802.11ad device encapsulates the target signal, it does not need to reverse the target signal.

Optionally, the sending station encapsulates the target signal after performing the inversion operation into a preset field of the first standard frame to obtain a first standard frame with a reverse feature. The first standard frame may be an 802.11ay frame, and the preset field of the first standard frame may be an Enhanced Directional Multi Gigabit Header (EDMG-Header), as shown in FIG. 8 , that is, 802.11ay Frame of frame The structure diagram includes the following fields: a short training field (STF), a channel estimation (CE), a header signal Header, an EDMG-Header, and a data Data. Compared with the frame structure of the 802.11ad frame in FIG. 7, the 802.11ad frame structure also includes the fields STF, CE, and Header. The three fields are the same in the two frame structures, and the 802.11ay frame is different from the 802.11ad frame structure. Between the field Header of the 802.11ad frame and the field Data, an EDMG-Header field is inserted, which is used to describe the transmission characteristics of the signal in the 802.11ay standard. In the embodiment of the present invention, at the receiving station, the difference between the signal in the EDMG-Header field of the 802.11ay frame and the data field signal of the 802.11ad frame is used to identify the two frames. The specific identification manner can be identified by referring to the description of the embodiment of FIG. 3.

Optionally, the sending station sends the first standard frame with the inversion feature, and the first standard frame may be an 802.11ay frame, that is, the 802.11ay sends the frame structure of the package shown in FIG. 8, and the EDMG-Header field of the frame structure A target signal with a negated feature is included. It should be noted that the sending station may be an AP supporting 802.11ay or an STA supporting 802.11ay.

It should be noted that the first standard is the 802.11ay standard, and the second standard is the 802.11ad standard;

The preset field of the first standard frame is an EDMG-Header field.

15 is a schematic structural diagram of another receiving station according to an embodiment of the present invention, FIG. 15 In an embodiment, the receiving station 40 includes an antenna 401, a transmitter 402, a receiver 403, a processor 404, and a memory 405. Processor 404 controls the operation of receiving station 40 and can be used to process signals. Memory 405 can include read only memory and random access memory and provides instructions and data to processor 404. Transmitter 402 and receiver 403 can be coupled to antenna 401. The various components of the receiving site 40 are coupled together by a bus system 406, which in addition to the data bus includes a power bus, a control bus, and a status signal bus. However, for clarity of description, various buses are labeled as bus system 406 in the figure. For example, the receiving site 40 can be the STA or AP shown in FIG.

Specifically, the memory 405 can store instructions to perform the following process:

Optionally, the receiving station may be an 802.11ay-enabled AP or an 802.11ay-enabled STA. When receiving the target frame, the receiving station needs to identify the frame type of the target frame, that is, whether the target frame is the first standard frame or the second standard frame. Specifically, the first standard frame may be 802.11. Ay, the second standard frame may be an 802.11ad frame.

Optionally, the receiving station processes the signal carried in the intercepted target field, and determines whether the inversion feature exists in the target field according to the processing result. Continue with the above 802.11ay and 802.11ad frames The identification is described as an example. Since the target signal carried in the EDMG-Header field of 802.11ay is reversed, and the Data field of 802.11ad is not reversed, the receiving station only needs to judge the intercepted target field. Whether there is a reversal feature. If there is an inversion feature, the target frame is an 802.11ay frame, and if there is no inversion feature, the target frame is an 802.11ad frame.

Optionally, if the target frame is detected to have an inversion feature, the target frame is a first standard frame, and the first standard frame may be an 802.11ay frame, because the 802.11ay device sends the frame structure to the frame structure. The target signal in the EDMG-Header field is inverted.

Optionally, if the target frame is detected to have no inversion feature, the target frame is a second standard frame, and the second standard frame may be an 802.11ad frame, because the 802.11ad device does not use the frame structure when transmitting the frame structure. The signal in the Data field in the structure is inverted.

It should be noted that the first standard frame is a frame structure formed by a sending station that supports the first standard, and then encapsulates the target signal into a preset field of the first standard frame;

The receiving station processes the signal carried in the target field, and determines whether the inversion feature exists in the target field according to the processing result, including:

Optionally, after receiving the target field of the preset position of the target frame, the receiving station divides the target field into the first data unit, the second data unit, and the third data unit according to the preset length. It should be noted that, as shown in FIG. 10, before the target frame is divided, the DCM soft demodulation of the signal in the target frame may be performed corresponding to the DCM modulation operation of the transmitting station in FIG. 9, and then according to FIG. 9 ( The length of each data unit in c1, -c2, c3) divides the signal in the target frame after soft demodulation into three data units.

Optionally, the sending station supporting the first standard encapsulates the inverted target signal into a preset data unit of the preset field when the target signal is encapsulated, and the other two data units in the preset field The packaged target signal is not inverted. Therefore, when the receiving station analyzes the received target frame, selecting two data units from the first data unit, the second data unit, and the third data unit to perform signal combination processing according to the position of the preset data unit, Obtain a processing signal.

The receiving station selects two data units from the first data unit, the second data unit, and the third data unit to perform signal combination processing according to the location of the preset data unit, to obtain a processing signal; include:

Optionally, the receiving station selects two data units from the divided first data unit, the second data unit, and the third data unit, where the selected two data units include a location corresponding to a location of the preset data unit. Data unit. The device supporting the first standard presets the data unit in the preset field to encapsulate the inverted target signal when transmitting the frame structure, so when the receiving station detects whether the target frame is the first standard frame, the three divided from the three When two data units are selected in the data unit, the selected two data units include data units corresponding to the locations of the preset data units.

Here, the first standard is 802.11ay, and the second standard is 802.11ad as an example. Referring to FIG. 10, the signal of the target frame is DCM demodulated and divided into three data units, which are corresponding to the sending in FIG. The processing of the signals of the respective data units by the station, the signals of the divided three data units are inversely processed in FIG. 10, but the difference from FIG. 9 is that the signals carried by the second data unit are inversed in FIG. When it was processed, it was not reversed. In FIG. 10, the signal carried by the first data unit after the inverse processing and the signal carried by the second data unit after the inverse processing are selected. It should be noted that, if the target frame is an 802.11ay frame, since it is the inverse processing of FIG. 9, before the FFT conversion, the output signal llr value of the three data units after inverse processing is the signal encoded by the three signals of FIG. The values are the same, except that the output signal after the inverse processing of the second data unit in Figure 10 exists. anti.

Optionally, the receiving station performs FFT processing on the signals carried by the selected two data units to obtain a processing signal. As shown in FIG. 10, the signal carried by the first data unit is inversely processed and the second data unit is inverted. The signal carried after the processing is subjected to FFT to obtain a processed signal.

Optionally, the receiving station separately calculates the energy of the odd subcarriers and the energy of the even subcarriers of the processed signal. In the FFT transform, the energy of the FFT signal of the same signal is mainly distributed on the odd subcarriers, and the energy of the signal after the symmetrically inverted signal FFT is mainly distributed on the even subcarriers. Therefore, the embodiment of the present invention mainly adopts the characteristic of the FFT. Detection of inversion features.

Determining, by the receiving station, whether the target field has an inversion feature according to the processing signal, including:

Optionally, if the difference between the energy of the even subcarriers and the energy of the odd subcarriers is greater than a preset threshold, the energy is mainly distributed on the even subcarriers after the FFT transform, indicating that the target field has an inversion feature.

The receiving station superimposes signals carried by the two second target data units to obtain a second location Signal.

Optionally, the signals carried by the selected two first target data units are superimposed to obtain a first processing signal, as shown in FIG. 11 , corresponding to the processing of the target signal by the 802.11ay transmitting station in FIG. 9 , FIG. 11 Performing inverse processing on the signals of the first data unit, the second data unit, and the third data unit. If the target frame is an 802.11ay frame, the first processed signal superimposed by the signals carried by the two first target data units is almost Zero because the signals carried by the two first target data units are antisymmetric. If the target frame is an 802.11ad frame, the feature is not available.

Optionally, the signals carried by the selected two second target data units are superimposed to obtain a second processing signal, as shown in FIG. 11 , corresponding to the processing of the target signal by the 802.11ay transmitting station in FIG. 9 , FIG. 11 And performing inverse processing on the signals of the first data unit, the second data unit, and the third data unit, and then superimposing the signal carried by the first data unit and the signal carried by the third data unit to obtain a second processing signal.

Optionally, comparing the first processing signal and the second processing signal, if the ratio between the first processing signal and the second processing signal is less than a preset threshold, the receiving station determines that the target field has an inversion feature. Here, the first standard is 802.11ay, and the second standard is 802.11ad as an example. If the frame is an 802.11ay frame, the first processed signal is almost zero, and the second processed signal is large, and if the frame is In the 802.11ad frame, the first processed signal is equivalent to the second processed signal, so the ratio between the first processed signal and the second processed signal can be utilized to determine whether it is an 802.11ay frame.

One of ordinary skill in the art can understand that all or part of the process of implementing the foregoing embodiments can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium. When executed, the flow of an embodiment of the methods as described above may be included. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

The steps in the method of the embodiment of the present invention may be sequentially adjusted, merged, and deleted according to actual needs.

The modules or units in the terminal in the embodiment of the present invention may be combined, divided, and deleted according to actual needs.

The components of the microcontroller and the like may be implemented by a general-purpose integrated circuit, such as a central processing unit (CPU), or an application specific integrated circuit (ASIC).

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and thus equivalent changes made in the claims of the present invention are still within the scope of the present invention.

Claims

A signal processing method is applied to an OFDM physical transmission system for orthogonal frequency division multiplexing, and is characterized in that:

The transmitting station acquires a target signal for indicating a signal transmission characteristic and a standard category for encapsulating the target signal, the standard category including a first standard or a second standard;

If the standard category is the first criterion, the sending station performs an inverse operation on the target signal;

The sending station encapsulates the target signal after performing the inversion operation into a preset field of the first standard frame, to obtain the first standard frame with the inversion feature;

The transmitting station transmits the first standard frame with a negation feature.
The method of claim 1 wherein said first standard is the 802.11ay standard and said second standard is the 802.11ad standard;

The preset field of the first standard frame is an EDMG-Header field.
A signal processing method is applied to an OFDM physical transmission system, and is characterized in that:

Receiving a target frame by the receiving station, and intercepting a target field of the preset position in the target frame;

The receiving station processes the signal carried in the target field, and determines whether there is an inversion feature in the target field according to the processing result;

If there is an inversion feature, the receiving station determines that the target frame is a first standard frame;

If there is no inversion feature, the receiving station determines that the target frame is a second standard frame.
The method according to claim 3, wherein the first standard frame is formed by a transmitting station supporting the first standard, and the target signal is inverted and encapsulated into a preset field of the first standard frame. Frame structure

The preset field of the first standard frame includes three data units, where the preset data unit encapsulates the target signal after being inverted, and the other two data units respectively encapsulate the target The target signal.
The method according to claim 4, wherein the receiving station processes the signal carried in the target field, and determines whether the inversion feature exists in the target field according to the processing result, including:

The receiving station divides the target field into a first data unit, a second data unit, and a third data unit according to a preset length;

The receiving station selects two data units from the first data unit, the second data unit, and the third data unit to perform signal combination processing according to the location of the preset data unit, to obtain a processing signal;

The receiving station determines, according to the processing signal, whether the target field has an inversion feature.
The method of claim 5, wherein the receiving station selects from the first data unit, the second data unit, and the third data unit according to a location of the preset data unit The two data units perform signal combination processing to obtain a processed signal;

The receiving station selects two data units from the first data unit, the second data unit, and the third data unit, and the selected two data units include the preset data unit The data unit corresponding to the location;

The receiving station performs fast Fourier transform processing on the signals carried by the two data units to obtain a processed signal.
The method according to claim 6, wherein the receiving station determines whether the target field has an inversion feature according to the processing signal, including:

The receiving station separately calculates energy of the odd subcarriers of the processed signal and energy of the even subcarriers;

And if the difference between the energy of the even subcarrier and the energy of the odd subcarrier is greater than a preset threshold, the receiving station determines that the target field has an inversion feature.
The method of claim 5 wherein said receiving station is based on said preset a location of the data unit, selecting two data units from the first data unit, the second data unit, and the third data unit for signal combination processing to obtain a processing signal;

The receiving station selects two first target data units from the first data unit, the second data unit, and the third data unit, where the first target data unit includes the preset data unit The corresponding data unit of the location;

The receiving station selects two second target data units from the first data unit, the second data unit, and the third data unit, and the second target data unit does not include the preset data. a data unit corresponding to the location of the unit;

The receiving station superimposes signals carried by the two first target data units to obtain a first processing signal;

The receiving station superimposes signals carried by the two second target data units to obtain a second processing signal.
The method of claim 8, wherein the receiving station determines, according to the processing signal, whether the target field has an inversion feature, including:

And if the ratio between the first processed signal and the second processed signal is less than a preset threshold, the receiving station determines that the target field has an inversion feature.
A transmitting station is applied to an OFDM physical transmission system for orthogonal frequency division multiplexing, and is characterized in that:

An obtaining unit, configured to acquire a target signal for indicating a signal transmission characteristic and a standard category for encapsulating the target signal, the standard category including a first standard or a second standard;

a processing unit, configured to perform an inversion operation on the target signal if the standard category is a first criterion;

The processing unit is further configured to encapsulate the target signal after performing the inversion operation into a preset field of the first standard frame, to obtain the first standard frame having the inversion feature;

And a transceiver unit, configured to send the first standard frame with the inversion feature.
The transmitting station according to claim 10, wherein said first criterion is 802.11ay Standard, the second standard is the 802.11ad standard;

The preset field of the first standard frame is an EDMG-Header field.
A receiving station is applied to an OFDM physical transmission system for orthogonal frequency division multiplexing, and is characterized in that:

a transceiver unit, configured to receive a target frame;

a processing unit, configured to intercept a target field of the preset position in the target frame; and process a signal carried by the target field, and determine, according to the processing result, whether the inversion feature exists in the target field;

The processing unit is further configured to: if the inversion feature exists, determine that the target frame is a first standard frame; if there is no inversion feature, determine that the target frame is a second standard frame.
The receiving station according to claim 12, wherein the first standard frame is formed by a transmitting station supporting the first standard, and the target signal is inverted and encapsulated into a preset field of the first standard frame. Frame structure

The preset field of the first standard frame includes three data units, wherein the preset data unit encapsulates the target signal after being inverted, and the other two data units respectively encapsulate the target signal.
The receiving station according to claim 13, wherein the processing unit processes the signal carried in the target field, and determines whether the inversion feature exists in the target field according to the processing result, and specifically includes:

The processing unit divides the target field into a first data unit, a second data unit, and a third data unit according to a preset length;

The processing unit selects two data units from the first data unit, the second data unit, and the third data unit to perform signal combination processing according to the position of the preset data unit, to obtain a processing signal;

The processing unit determines, according to the processing signal, whether the target field has an inversion feature.
The receiving station according to claim 14, wherein the processing unit is configured from the first data unit, the second data unit, and the third data unit according to a location of the preset data unit Selecting two data units for signal combination processing, and obtaining the processed signals specifically includes:

The processing unit selects two data units from the first data unit, the second data unit, and the third data unit, and the selected two data units include the preset data unit The data unit corresponding to the location;

The processing unit performs a fast Fourier transform process on the signals carried by the two data units to obtain a processed signal.
The receiving station according to claim 15, wherein the determining, by the processing unit, whether the target field has an inversion feature according to the processing signal comprises:

The processing unit respectively calculates energy of odd subcarriers of the processed signal and energy of even subcarriers;

And if the difference between the energy of the even subcarrier and the energy of the odd subcarrier is greater than a preset threshold, the processing unit determines that the target field has an inversion feature.
The receiving station according to claim 14, wherein the processing unit is configured from the first data unit, the second data unit, and the third data unit according to a location of the preset data unit Selecting two data units for signal combination processing, and obtaining the processed signals specifically includes:

The processing unit selects two first target data units from the first data unit, the second data unit, and the third data unit, the first target data unit including the preset data unit The corresponding data unit of the location;

The processing unit selects two second target data units from the first data unit, the second data unit, and the third data unit, and the second target data unit does not include the preset data a data unit corresponding to the location of the unit;

The processing unit superimposes signals carried by the two first target data units to obtain a first processing signal;

The processing unit superimposes the signals carried by the two second target data units to obtain a second processing signal.
The receiving station according to claim 17, wherein the determining, by the processing unit, whether the target field has an inversion feature according to the processing signal comprises:

And if the ratio between the first processed signal and the second processed signal is less than a preset threshold, the processing unit determines that the target field has an inversion feature.