WO2015096164A1

WO2015096164A1 - Wireless communications method and apparatus

Info

Publication number: WO2015096164A1
Application number: PCT/CN2013/090781
Authority: WO
Inventors: 蔡云龙
Original assignee: 华为技术有限公司
Priority date: 2013-12-27
Filing date: 2013-12-27
Publication date: 2015-07-02
Also published as: CN105684371B; CN105684371A

Abstract

Disclosed are a wireless communications method and apparatus. The method comprises: determining a communications frequency band; obtaining a wavelength value λ of a sending end signal according to the communications frequency band; establishing an ellipsoidal surface reflector model; separately disposing a sending end and a reception end on a first focus and a second focus of an ellipsoidal surface reflector. Also disclosed is a wireless communications apparatus. The apparatus comprises a sending end, an ellipsoidal surface reflector, and a reception end. The sending end and the reception end are separately disposed on a first focus and a second focus of the ellipsoidal surface reflector. In the embodiments of the present invention, by separately disposing a sending end and a reception end on a first focus and a second focus of an ellipsoidal surface reflector, a signal sent by the sending end can be directly focused on the reception end by means of reflection of a reflector, so that signal loss in high-frequency transmission is reduced and an alignment process of the reception end and the sending end during signal transmission is eliminated, thereby improving the whole transmission efficiency, and meeting demands of users for rapid and convenient communication.

Description

Wireless communication method and device

The present invention relates to the field of mobile communications technologies, and in particular, to a wireless communication method and apparatus. Background technique

At present, the use of high-frequency transmission technology combined with a wireless environment such as a newsstand or an airport waiting area enables people to enjoy high-speed downloads at all times. High-frequency transmission is a communication technique that transmits people's required data to a receiving device through millimeter-wave or high-frequency microwaves. Millimeter wave or high-frequency microwave in high-frequency transmission has a communication bandwidth of 4艮, which can transmit large amounts of data efficiently and quickly, but it will cause huge signal loss due to high-frequency transmission, and the high-frequency signal source itself has low power. Therefore, it is necessary to aggregate the transmitted or received signals during the transmission process.

In the prior art, in the high-frequency transmission, by using a high-gain antenna at the transmitting end, the data has a high directivity in the transmission process, that is, the signal can be aggregated, so that the signal loss due to the high-frequency transmission can be reduced. The larger the gain of the antenna, the smaller the half power lobe width of the antenna. The half power lobe width of the antenna indicates the directivity of the antenna transmission. The smaller the half power lobe width value, the narrower the signal beam transmitted through the antenna, and the higher the directivity of the antenna transmission.

In the process of implementing the present invention, the inventors have found that the prior art has at least the following problems: In the prior art, by using a high-gain antenna at the transmitting end to reduce signal loss in high-frequency transmission, since the high-gain antenna concentrates the signal, The beam of the signal is narrowed, so that the receiving end needs to be aligned with the transmitting end when receiving the data signal. In actual use, it sometimes takes a long time to communicate on the communication alignment, so that the overall transmission efficiency is lowered, thereby making people Fast, convenient communication requirements are difficult to guarantee. Summary of the invention

In order to solve the problem that the signal alignment between the receiving end and the transmitting end is difficult in the prior art, the embodiment of the present invention provides a wireless communication method and apparatus. The technical solution is as follows:

In a first aspect, a wireless communication method is provided, where the method includes:

Determining the communication band; Obtaining a wavelength value λ of the signal of the transmitting end according to the communication frequency band;

Establish an ellipsoidal reflector model;

Configuring a transmitting end and a receiving end respectively on the first focus and the second focus of the ellipsoidal reflector;

Wherein, the connection between the end point of the ellipsoidal reflector and the end of the transmitting end and the transmitting end is _Γι , and the line connecting the ellipsoidal reflector surface and the transmitting end is perpendicular to _Γι r ₂ , the connection between the transmitting end and the receiving end is set to r ₃ , and if the lengths of the _ri , r ₂ and r ₃ satisfy the far field condition, the ellipsoid is determined by the lengths of _ri , r ₂ and r ₃ The size of the reflector;

A transmitting antenna and a receiving device are respectively placed on the transmitting end and the receiving end, and the transmitting antenna transmits a transmission signal to the receiving device through the ellipsoidal reflector.

In conjunction with the first aspect, in a first implementation of the first aspect, the transmitting end and the receiving end are respectively disposed on the first focus and the second focus of the ellipsoidal reflector, and the method includes:

Setting the sending end as a sending area, and setting a center of the sending area on the first focus;

The receiving end is set as a receiving area, and the center of the receiving area is set at the second focus.

With the first implementation of the first aspect, in the second implementation manner of the first aspect, the receiving the receiving area of the receiving end includes:

And setting a power minimum attenuation value of the received signal at the receiving end, and setting the receiving area range according to the power minimum attenuation value.

In conjunction with the second implementation of the first aspect, in a third implementation manner of the first aspect, the method further includes:

Calculating, according to the size of the ellipsoidal surface, a signal power when the transmitting end signal reaches the receiving area, and calculating a power attenuation value according to the power value of the signal power and the power value of the receiving end;

And if the power attenuation value is less than or equal to the power minimum attenuation value, determining the size of the ellipsoidal surface as the size of the ellipsoidal reflector;

If the power attenuation value is greater than the power minimum attenuation value, re-adjust the ellipsoid size such that the power attenuation value is less than or equal to the power minimum attenuation value, and determine the re-adjusted ellipsoid size as The size of the ellipsoidal reflector.

With reference to the third implementation manner of the first aspect, in a fourth implementation manner of the first aspect, The lengths of _ri , r ₂ and r ₃ satisfy the far field conditions, including:

The size of the ellipsoidal reflector satisfies the lengths of _ri , r ₂ and r ₃ respectively greater than or equal to 10 λ . With the fourth implementation of the first aspect, in a fifth implementation manner of the first aspect, the method further includes:

Determining a half power lobe width of the receiving device antenna;

Providing a shielding surface at a center of the receiving end, the diameter of the shielding surface being the same as the maximum length of the receiving device;

Setting an angle θ such that the angle Θ is less than or equal to half of the width of the half power lobe, and determining the size of the ellipsoidal reflector by the angle Θ;

The signal sent by the transmitting end is transmitted to the ellipsoidal reflector along the edge of the occlusion surface, and is reflected by the ellipsoidal reflector to reach the signal of the second focus, and the signal with the highest power is reflected. The angle between the line connecting the second focus and the horizontal line is Θ.

With reference to the fifth implementation manner of the first aspect, in a sixth implementation manner of the first aspect, the power attenuation value is obtained according to the power value of the signal with the highest power and the power value of the receiving end, where the power is obtained. The attenuation value is less than or equal to the power minimum attenuation value of the received signal at the receiving end.

In a second aspect, a wireless communication device is provided, the device comprising a transmitting end, an ellipsoidal reflector and a receiving end, wherein the transmitting end and the receiving end are respectively disposed at a first focus of the ellipsoidal reflector and Second focus;

Wherein, the connection between the end point of the ellipsoidal reflector closest to the transmitting end and the transmitting end is _Γι , and any point perpendicular to _Γι and intersecting the surface of the ellipsoidal reflector is connected to the transmitting end. The line is set to r ₂ , the connection between the transmitting end and the receiving end is set to r ₃ , and the lengths of the _ri , r ₂ and r ₃ satisfy the far field condition.

The beneficial effects brought by the technical solutions provided by the embodiments of the present invention are:

In the embodiment of the present invention, by setting an ellipsoidal reflector, the transmitting end and the receiving end are respectively disposed at the first focus and the second focus of the ellipsoidal reflector, so that the wireless signal emitted by the transmitting end can be directly concentrated by the reflector reflection. At the receiving end, the signal loss in high-frequency transmission is reduced, and the alignment process between the receiving end and the transmitting end when transmitting signals is omitted, thereby improving the overall transmission efficiency and satisfying people's requirements for fast and convenient communication. DRAWINGS

In order to more clearly illustrate the technical solution in the embodiment of the present invention, the following description will be made on the embodiment. The drawings to be used are described in a single manner. It is obvious that the drawings in the following description are only some embodiments of the present invention, and can be used by those skilled in the art without any creative work. These figures take additional drawings.

FIG. 1 is a flowchart of a wireless communication method according to an embodiment of the present invention;

2 is a schematic structural view of an ellipsoidal reflector model according to another embodiment of the present invention; FIG. 3 is a schematic structural diagram of an ellipsoidal reflector model according to another embodiment of the present invention; FIG. 4 is a schematic diagram of another embodiment of the present invention. Schematic diagram of the structure of the wireless communication device.

Where: 1 sender,

2 ellipsoidal reflector,

3 receiving end,

4 blocking surface,

Refers to the line connecting the end point of the ellipsoidal reflector closest to the transmitting end to the transmitting end, and r ₂ is the line connecting the _point perpendicular to the ellipsoidal reflector surface and the transmitting end.

r ₃ refers to the connection between the transmitting end and the receiving end,

Θ refers to the angle between the reflection point of the signal with the highest power to the line connecting the second focus and the horizontal line. Detailed ways

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

Embodiment 1

As shown in FIG. 1, a wireless communication method is provided, where the method includes:

Determining the communication band;

Obtaining, according to the communication frequency band, a wavelength value λ of the signal of the transmitting end;

Establish an ellipsoidal reflector model;

Wherein, the connection between the end point of the ellipsoidal reflector closest to the transmitting end and the transmitting end is _ri , and the point perpendicular to the _ri and intersecting the surface of the ellipsoidal reflector is connected to the transmitting end. The line is set to r ₂ , and the connection between the transmitting end and the receiving end is set to r ₃ (see FIG. 2 ), if r!, r ₂ and r ₃ both satisfy the far field condition, and the lengths of _ri , r ₂ and r ₃ are determined as the size of the ellipsoidal reflector;

A transmitting antenna and a receiving device are respectively placed on the transmitting end and the receiving end, and the transmitting antenna transmits a signal to the receiving device through the ellipsoidal reflector.

Specifically, a transmission frequency band is set in advance, and a half-wavelength value λ of the transmission signal can be calculated by using the transmission frequency band, and an ellipsoidal reflector model is established by using an ellipse having a focusing characteristic at the focus, and the transmitting end and the receiving end are respectively disposed at a first focus and a second focus of the ellipsoidal reflector model, such that the signal emitted by the transmitting end is reflected by the ellipsoidal reflector and collected at the receiving end, and further, the ellipsoidal reflector is disposed closest to the transmitting end The connection between the end point and the transmitting end is _ri , the line perpendicular to the _ri and intersecting the surface of the ellipsoidal reflector is connected to the transmitting end as r ₂ , and the transmitting end is connected to the receiving end The line is set to r ₃ , and the size of the ellipsoidal reflector satisfies the length of _ri , r ₂ and r ₃ satisfying the far field condition, where the far field condition is set to 10 λ , if the lengths of _ri , r ₂ and r ₃ Less than 10 λ will cause the signal from the transmitting end to interact with the signal reflected by the ellipsoidal reflector, resulting in mutual coupling, affecting the normal transmission of the signal; when _ri , r ₂ and r ₃ are both long in length At or equal to 10 λ, the signal reaches a certain attenuation during transmission, and the reflected signal does not affect the transmitted signal. Therefore, the ellipsoidal reflector of the present invention is sized to satisfy _ri , r ₂ and r _{3 .} The length is greater than or equal to the requirement of 10 λ, so that the transmission end signal is concentrated on the receiving end through the ellipsoidal reflector under the premise of ensuring normal reception, thereby reducing signal loss and enhancing signal transmission effect, so that only When the receiving device is placed on the receiving end, good reception can be achieved.

In the embodiment of the present invention, by setting an ellipsoidal reflector, the transmitting end and the receiving end are respectively disposed at the first focus and the second focus of the ellipsoidal reflector, so that the signal sent by the transmitting end is directly collected by the reflector and received at the receiving end. At the same time, the signal loss in the high-frequency transmission is reduced, and the alignment process between the receiving end and the transmitting end when transmitting the signal is omitted, thereby improving the overall transmission efficiency and satisfying the requirements for fast and convenient communication; The ellipsoidal reflector has the function of converging signals, so that the use of the transmitting antenna for the gain of the transmitting antenna can be reduced, so that the design and manufacturing cost of the transmitting antenna is reduced, thereby increasing the application range of the high-frequency transmission technology.

As shown in FIG. 2, further, the transmitting end 1 and the receiving end 3 are respectively set as the first focus and the second focus of the ellipsoidal reflector 2, including:

Setting the receiving end as a receiving area, and setting a center of the receiving area at the second focus On.

Wherein, the sending area and the receiving area of the transmitting end 1 and the receiving end 3 are respectively set, so that the transmitting device and the receiving device can perform signal transmission and reception as long as they are respectively placed in the transmitting area and the receiving area, so that the transmitting device and the receiving device The type and placement range has been expanded. The transmitting area of the transmitting end 1 can be specifically set according to the size of the transmitting device, and the size of the transmitting device is a radius and the first focus is the center of the sphere, and a spherical area of the transmitting end 1 is set, so that the ellipsoidal reflection is set. The line connecting the end point of the device 2 closest to the transmitting end 1 to the edge point of the spherical portion of the transmitting end 1 is _ri , and any point perpendicular to the surface of the ellipsoidal reflector 2 and the transmitting end 1 The line connecting the edge points of the spherical area is set to r ₂ , and the line connecting the edge point of the spherical area of the transmitting end 1 and the edge point of the receiving area of the receiving end 3 is set to r ₃ , and the size of the ellipsoidal reflector 2 satisfies _ri The lengths of r ₂ and r ₃ are all greater than or equal to 10 λ. There are various methods for setting the transmission area and the reception area. It is known to those skilled in the art that the setting method for facilitating signal transmission and reception and enlarging the requirements of the use range of the transmission device and the reception device should be within the protection range.

As shown in FIG. 2, the receiving area of the receiving end 3 is specifically configured to: set a minimum power attenuation value of the signal received by the receiving end 3, and set the receiving area according to the minimum power attenuation value. range.

The minimum attenuation value of the received signal of the receiving end 3 is the minimum attenuation value of the signal power received by the receiving end 3 relative to the power of the transmitting end 1 or the maximum possible receiving signal of the receiving end 3. The minimum power attenuation value is typically 0 or negative. Set the minimum attenuation value of the received signal of the receiving end 3, and set the receiving area with the minimum attenuation value of the received signal. This ensures that the receiving device within this range can achieve the best receiving effect. For example, the power received by the receiving device is lw, and the minimum attenuation value of the received signal is generally -3 dB, and the range of the received signal power is a radius from 1w to 0.5w, and the second focus is in the spherical receiving area of the spherical center. The power of the signal can meet the receiving requirements of the receiving device. The power minimum attenuation value of the received signal may be set to be multiple. It is known to those skilled in the art that the range of values required for receiving the receiving device should be within the protection range.

Further, the method further includes:

And if the power attenuation value is less than or equal to the power minimum attenuation value, determining a size of the ellipsoidal surface as a size of the ellipsoidal reflector; And if the power attenuation value is greater than the power minimum attenuation value, re-adjusting the size of the ellipsoid so that the power attenuation value is less than or equal to the power minimum attenuation value, and determining the re-adjusted ellipsoid size Is the size of the ellipsoidal reflector.

Wherein, by the size of the assumed ellipsoidal reflector 2, the loss of the signal during spatial transmission and reflection after the signal is transmitted through the transmitting end 1 is calculated, so that the signal power of the signal when it reaches the receiving area can be obtained. Calculating a power attenuation value according to the power value of the receiving end, comparing the power attenuation value with the set minimum power attenuation value, and if the power attenuation value is less than or equal to the minimum power attenuation value, the ellipsoidal reflector 2 The size can meet the requirements of signal transmission and reception; if the power attenuation value is greater than the power value of the power minimum attenuation value, by re-adjusting the size of the ellipsoidal reflector 2, the power attenuation value is less than or equal to The limiting condition of the minimum attenuation value of the power is sufficient.

Preferably, the size of the ellipsoidal reflector satisfies the lengths of _ri , r ₂ and r ₃ respectively satisfying the far field condition, including:

The lengths of _ri , r ₂ and r ₃ are all greater than or equal to 10 λ .

Wherein, when the lengths of _ri , r ₂ and r ₃ are all greater than or equal to 10 λ, the signal reaches a certain attenuation during transmission, and the reflected signal does not affect the transmitted signal, therefore, the ellipses in the present invention The size of the spherical reflector is such that the lengths of _ri , r ₂ and r ₃ are greater than or equal to 10 λ.

As shown in FIG. 3, the method further includes:

Determining a half power lobe width of the receiving device antenna;

An obstructing surface 4 is disposed at the center of the receiving end, and the diameter of the obscuring surface 4 is the same as the maximum length of the receiving device;

Setting an angle θ such that the angle Θ is less than or equal to half the width of the half power lobe of the receiving device antenna, and determining the size of the ellipsoidal reflector 2 by the angle Θ;

The signal sent by the transmitting end 1 is transmitted to the ellipsoidal reflector 2 along the edge of the shielding surface 4, and is reflected by the ellipsoidal reflector 2 to reach the signal of the second focus, and the power is maximum. The angle between the reflection point of the signal to the second focus and the horizontal line is Θ.

Specifically, the receiving device is placed in the receiving area. If the signal sent by the transmitting end 1 is blocked by the object during transmission, the signal can only be reflected by the end of the ellipsoidal reflector 2 near the receiving end, and the reflected signal is transmitted. When entering the receiving end, in order to satisfy the situation in which the receiving device can still receive the signal, it is necessary to determine the half power lobe width of the receiving device according to the actual situation, and set the diameter of the shielding surface 4 according to the size of the receiving device, In the circular plane whose maximum size is the diameter and the second focus is the center of the receiving device, the signal sent by the transmitting end 1 cannot pass through this plane, and the transmitting end 1 sends out The signal can only be transmitted along the circular plane edge to the inner surface of the ellipsoidal reflector 2, and after being reflected by the inner surface of the ellipsoidal reflector 2, reaches the second focus, and is reflected by the ellipsoidal reflector 2 to reach the second In the signal of the focus, by comparing the magnitude of the signal power with each other, selecting a signal in which the signal power value is the largest, and the angle between the line connecting the reflection point of the signal to the second focus and the horizontal line is denoted by θ, if The angle is less than or equal to half of the half power lobe width of the receiving device antenna, and the signal can be received by the receiving device; if the angle of the chirp is greater than half of the half power lobe width of the receiving device, the ellipsoidal reflector needs to be re-adjusted The size of 2 is such that the angle of the 满足 satisfies the requirement of less than or equal to half the half power lobe width of the receiving device antenna. As known to those skilled in the art, there are various types of transmitting antennas at the transmitting end 1, such as a cylindrical antenna, a butterfly antenna, etc., and a cylindrical antenna is taken as an example. The cylindrical antenna is disposed at the transmitting end 1 and the cylindrical antenna is at the intermediate portion. If the signal power is the strongest, you can select several signal points in this range and calculate which signal point has the largest power to determine θ. Other types of antennas can also estimate several points whose signal power is the largest, and can calculate and compare the signal points of the maximum power value.

As shown in FIG. 3, further, according to the power value of the signal with the highest power and the power value of the receiving end, a power attenuation value is obtained, where the power attenuation value is less than or equal to the power of the receiving signal of the receiving end. Minimum attenuation value.

In order to make the signal with the highest power receive by the receiving device, it can have a good receiving effect and meet the receiving requirement of the receiving device. Therefore, the power value of the signal with the highest set power is compared with the power value of the receiving end. The power attenuation value is less than or equal to the power minimum attenuation value of the received signal at the receiving end. Embodiment 2

As shown in FIG. 4, a wireless communication device is provided, the device comprising a transmitting end 1, an ellipsoidal reflector 2 and a receiving end 3, wherein the transmitting end 1 and the receiving end 3 are respectively disposed on the ellipsoidal surface reflection The first focus and the second focus of the device 2;

Wherein, the line connecting the end point of the ellipsoidal reflector 2 closest to the transmitting end 1 to the transmitting end 1 is _ri , perpendicular to _ri and intersecting the surface of the ellipsoidal reflector 2 The connection line of the transmitting end 1 is set to r ₂ , the connection line between the transmitting end 1 and the receiving end 3 is set to r ₃ , and the _{lengths of the Γι} , r ₂ and r ₃ satisfy the far field condition.

Specifically, by providing a wireless communication device, the transmitting end 1 and the receiving end 3 are respectively disposed on the first focus and the second focus of the ellipsoidal reflector 2, and the transmitting device and the receiving device are respectively disposed at the transmitting end 1 And the receiving end 3, such that the signal of the transmitting end 1 is reflected by the ellipsoidal reflector 2, The signal can be collected at the receiving end 3, and the receiving device is directly placed at the receiving end 3, so that the signal transmission and reception can be realized, and the process of aligning the signals of the transmitting end 1 and the receiving end 3 is omitted, which greatly reduces the signal transmission. The preparation process improves the efficiency of high-frequency transmission. In addition, the ellipsoidal reflector 2 can concentrate the signal of the transmitting end 1 at the receiving end 3, so that the transmitted signal has a certain directivity, thereby reducing the transmission signal during transmission. Signal loss, therefore, by using the ellipsoidal reflector 2, the use of the high gain antenna in terms of gain can be reduced, thereby reducing the cost of the high gain antenna, reducing the application cost of the high frequency transmission technology in life, and making the expansion high. The application range of frequency transmission technology further satisfies people's requirements for fast and convenient communication.

The serial numbers of the embodiments of the present invention are merely for the description, and do not represent the advantages and disadvantages of the embodiments.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., which are within the spirit and scope of the present invention, should be included in the protection of the present invention. Within the scope.

Claims

claims

1. A wireless communication method, characterized in that the method includes:

Determine the communication frequency band;

According to the communication frequency band, obtain the wavelength value λ of the sending end signal;

Establish an ellipsoidal reflector model;

The sending end and the receiving end are respectively arranged at the first focus and the second focus of the ellipsoidal reflector;

Wherein, let the connection line between the end point on the ellipsoidal reflector closest to the sending end and the sending end be _ri , and the connection between any point perpendicular to _ri and intersecting with the surface of the ellipsoidal reflector and the sending end is The line is set to r ₂ , the connection line between the sending end and the receiving end is set to r ₃ , if the lengths of _ri , r ₂ and r ₃ all meet the far field conditions, then the lengths of _ri , r 2 and r 3 are determined by The size of the ellipsoidal reflector; Place the transmitting antenna and the receiving device on the transmitting end and the receiving end respectively, and the transmitting antenna transmits the signal to the receiving device through the ellipsoidal reflector.

2. The wireless communication method according to claim 1, wherein the sending end and the receiving end are respectively arranged at the first focus and the second focus of the ellipsoidal reflector, including:

Set the sending end as a sending area, and set the center of the sending area on the first focus;

The receiving end is set as a receiving area, and the center of the receiving area is set on the second focus.

3. The wireless communication method according to claim 2, characterized in that said setting the receiving area of the receiving end specifically includes:

Set the minimum power attenuation value of the received signal at the receiving end, and set the receiving area range according to the minimum power attenuation value.

4. The wireless communication method according to claim 3, wherein the method further includes: calculating the signal power of the transmitting end signal when it reaches the receiving area according to the size of the ellipsoid, and The power attenuation value is calculated from the power value of the signal power and the power value of the receiving end; if the power attenuation value is less than or equal to the minimum power attenuation value, then the scale of the ellipsoid is The size is determined as the size of the ellipsoidal reflector;

If the power attenuation value is greater than the minimum power attenuation value, re-adjust the size of the ellipsoid so that the power attenuation value is less than or equal to the minimum power attenuation value, and determine the size of the re-adjusted ellipsoid. is the size of the ellipsoidal reflector.

5. The wireless communication method according to claim 4, characterized in that the lengths of _ri , _r2 and _r3 all satisfy far-field conditions, including:

The lengths of _ri , _r2 and _r3 are all greater than or equal to 10 λ.

6. The wireless communication method according to claim 5, wherein the method further includes: determining the half-power beam width of the receiving device antenna;

A blocking surface is provided at the center of the receiving end, and the diameter of the blocking surface is the same as the maximum length of the receiving device;

Set the included angle θ so that the included angle Θ is less than or equal to half of the half-power lobe width, and determine the size of the ellipsoidal reflector through the included angle Θ;

Wherein, the signal emitted by the transmitting end is transmitted to the ellipsoidal reflector along the edge of the shielding surface, and is reflected by the ellipsoidal reflector and then reaches the second focus. Among the signals with the highest power, the reflection of the signal with the highest power is The angle between the line connecting the point to the second focus and the horizontal line is Θ.

7. The wireless communication method according to claim 6, wherein a power attenuation value is obtained based on the power value of the signal with the highest power and the power value of the receiving end, and the power attenuation value is less than or equal to The minimum attenuation value of the power received by the receiving end.

8. A wireless communication device based on any one of claims 1-7, characterized in that the device includes a transmitting end, an ellipsoid reflector and a receiving end, and the transmitting end and the receiving end are respectively provided At the first focus and the second focus of the ellipsoidal reflector;

Wherein, let the connection line between the end point on the ellipsoidal reflector closest to the transmitting end and the transmitting end be _Γι , and the connection between any point perpendicular to _Γι and intersecting with the surface of the ellipsoidal reflector and the transmitting end. The line is set to r ₂ , the connection line between the sending end and the receiving end is set to r ₃ , and the lengths of _ri , r ₂ and r ₃ all meet the far field conditions.