Millimeter wave signal transmission multipath interference confrontation method and device

Abstract

The invention discloses a multipath interference countermeasure method and device for millimeter wave signal transmission, and relates to the technical field of millimeter wave signal transmission. The millimeter wave signal transmission multipath interference confrontation method comprises the following steps: S1, a multipath diversity technology: different dividers are used at a transmitting end and a receiving end, so that multipath interference can be effectively suppressed, and the signal-to-noise ratio is improved; and S2, forward error correction coding: forward error correction coding is adopted in a data modulation stage, so that harmful effects caused by multipath can be effectively reduced. According to the millimeter wave signal transmission multipath interference confrontation method and device, the angle and orientation of the antenna body can be conveniently adjusted, and the millimeter wave signal transmission multipath interference confrontation capability can be improved; according to the technical scheme, dust and other impurities attached to the surface of the antenna body can be automatically blown and cleaned, and when the antenna is not used, the antenna body can be sealed and protected, the influence of the dust and other impurities is reduced, the multipath interference resistance of millimeter wave signal transmission can be improved, and meanwhile the service life of the antenna is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of millimeter wave signal transmission, and in particular to a method and device for counteracting multipath interference in millimeter wave signal transmission. Background Art

[0002] In the millimeter wave communication system of rail transit, the multipath effect in the signal transmission process may cause the signal reception quality to deteriorate and the communication bit error rate to increase. The multipath interference countermeasure methods in millimeter wave signal transmission mainly include multipath diversity technology, forward error correction coding technology, signal processing algorithm optimization, antenna design and array configuration optimization, and system-level simulation and verification, and the equipment involved is mainly anti-interference antennas.

[0003] However, the existing millimeter wave signal transmission multipath interference countermeasure method and equipment are not convenient for adjusting the angle and direction of the antenna when in use, which affects its countermeasure effect. At the same time, dust and other impurities are easily attached to its surface, which also affects its countermeasure effect. Summary of the invention

[0004] The purpose of the present invention is to provide a method and device for counteracting multipath interference in millimeter wave signal transmission, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a method for counteracting multipath interference in millimeter wave signal transmission, comprising the following steps:

[0006] S1: Multipath diversity technology: Using different diversity devices at the transmitting and receiving ends, such as space diversity and frequency diversity, can effectively suppress multipath interference and improve the signal-to-noise ratio. The current research focus is on improving the performance of the diversity device, such as reducing the implementation complexity and improving energy efficiency. Future research trends may include new diversity device structures and designs, and the combination of diversity and coding technology;

[0007] S2: Forward error correction coding technology: The use of forward error correction coding in the data modulation stage can effectively reduce the harmful effects caused by multipath. The current forward error correction coding technology is mainly based on Shannon's inequality. New coding technologies and strategies may emerge in the future, such as coding methods based on information theory;

[0008] S3: Signal processing algorithm optimization: Research and design specific signal processing algorithms suitable for millimeter wave communication systems, such as adaptive filtering, space-time adaptive weighting, minimum mean square error (MMSE), etc., which can effectively reduce or eliminate multipath interference. Current research hotspots include algorithm optimization design, real-time online learning, algorithm model correction, etc.

[0009] S4: Antenna design and array configuration optimization: Reasonable design of antenna shape and size, as well as appropriate array layout, can reduce multipath reflection and beam spread, and improve signal focus and signal-to-noise ratio. The current research focuses on innovative antenna design, efficient optimization of array layout, and performance analysis of antennas in multipath environments.

[0010] S5: System-level simulation and verification: Develop a complete millimeter wave communication system, including RF front-end, baseband processing, channel encoding and decoding modules, and perform system-level simulation and actual testing to verify the effectiveness of the proposed methods and equipment. This is a very important link. Only through system-level simulation and testing can we ensure that our design can perform well in actual applications.

[0011] A millimeter wave signal transmission multipath interference countermeasure device includes an antenna body and a mounting base, wherein the side wall of the mounting base is rotatably connected to a rotating cover through a rotating mechanism, and the end of the rotating cover is fixedly connected to an adjusting motor, the output end of the adjusting motor is fixedly connected to a rotating rod, and the other end of the rotating rod passes through the other end of the rotating cover and is fixed to the base of the antenna body, the end of the rotating cover is fixedly connected to a ring-shaped telescopic cover, and the end of the telescopic cover is fixedly connected to a hollow ring-shaped cover, the inner side wall of the ring-shaped cover is provided with a plurality of blowing holes arranged in an array, and the side wall of the rotating cover is provided with a moving mechanism for moving the ring-shaped cover, an air supply mechanism for supplying air into the ring-shaped cover is provided in the rotating cover, and the side wall of the ring-shaped cover is rotatably connected to two symmetrically arranged sealing plates through the rotating mechanism.

[0012] Preferably, the rotating mechanism includes two symmetrically arranged fixing plates fixedly connected to the side walls of the mounting seat, and the side walls of each fixing plate are rotatably connected to a rotating plate via a rotating shaft, and the rotating plate is fixed to the end of a rotating cover, and the side walls of one of the fixing plates are fixedly connected to a first motor, and the output end of the first motor is fixed to one end of the rotating shaft.

[0013] Preferably, the air supply mechanism includes a movable disk slidably connected in the rotating cover, and the movable disk is sleeved on the side wall of the rotating rod, a movable component is arranged between the movable disk and the annular cover, and an air intake pipe is fixedly inserted into the side wall of the rotating cover, a first one-way valve is arranged in the air intake pipe, a hose is fixedly connected between the rotating cover and the annular cover, and a second one-way valve is arranged in the hose.

[0014] Preferably, the moving assembly includes a moving rod inserted at the end of the rotating cover, and the two ends of the moving rod are respectively fixed to the moving disk and the annular cover, and the side wall of the moving rod is sleeved with a first spring, and the two ends of the first spring are respectively fixed to the moving disk and the end of the rotating cover.

[0015] Preferably, the moving mechanism includes a first fixed block fixedly connected to the top of the rotating cover, and the side wall of the first fixed block is fixedly connected to a second motor, the output end of the second motor is fixedly connected to a rotating disk, and the side wall of the rotating disk is fixedly connected to a pull rope, the other end of the pull rope is fixedly connected to a connecting block, and the connecting block is fixed to the top of the annular cover.

[0016] Preferably, the rotating mechanism includes two symmetrically arranged support blocks fixedly connected to the side wall of the annular cover, and the opposite side walls of the two support blocks are rotatably connected to the rotating blocks through a rotating pin, the rotating blocks are fixed to the side wall of the sealing plate, and the rotation of the rotating pin is driven by a driving mechanism.

[0017] Preferably, the driving mechanism includes a gear fixedly mounted on the side wall of the rotating pin, and the top of the support block is connected to a rack via a reset mechanism, the rack is meshed with the gear, and the movement of the rack is limited by a limiting mechanism.

[0018] Preferably, the reset mechanism includes two symmetrically arranged second fixed blocks fixedly connected to the top of the support block, and the opposite side walls of the two second fixed blocks are fixedly connected to two symmetrically arranged guide rods, the side wall of each guide rod is provided with a slider, and the slider is fixed to the rack, and the side wall of each guide rod is provided with two symmetrically arranged second springs.

[0019] Preferably, the limiting mechanism comprises a push rod fixedly connected to the side wall of the rack, and the other end of the push rod is fixedly connected to a disc, the side wall of the push rod is sleeved with a stopper, and the stopper is fixed to the side wall of the rotating cover.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) The method and device for counteracting multipath interference in millimeter wave signal transmission is provided with a rotating mechanism, etc. When in use, after the mounting base is installed and fixed on the inner wall of the tunnel, the first motor is started, and the rotation of the first motor drives the rotation of the rotating plate, thereby driving the rotating cover to rotate, and then driving the antenna body to rotate through the rotating rod, so as to facilitate adjustment of the angle of the antenna body. The adjustment motor is started, and the rotation of the adjustment motor drives the rotation of the rotating rod, thereby driving the antenna body to rotate, so as to facilitate adjustment of the direction of the antenna body, thereby facilitating adjustment of the angle and direction of the antenna body, and improving the capability of counteracting multipath interference in millimeter wave signal transmission.

[0022] (2) This method and device for counteracting multipath interference in millimeter wave signal transmission, by setting up an air supply mechanism, etc., when the antenna body does not need to work, by starting the second motor, the rotation of the second motor drives the rotation of the rotating disk, so that the pull rope becomes loose, and under the tension of the first spring, the movable disk moves in the rotating cover, and at the same time, drives the annular cover to move away from the rotating cover, and the telescopic cover is stretched. Moreover, when the movable disk moves, it can squeeze the air temporarily stored in the rotating cover. At the same time, the first one-way valve is closed and the second one-way valve is opened. At this time, the air temporarily stored in the rotating cover can be squeezed and enter the annular cover through the hose and blown out through the blowing hole, so that dust and other impurities attached to the surface of the antenna body can be automatically blown and cleaned, which can improve the multipath interference counteracting capability of millimeter wave signal transmission.

[0023] (3) This method and device for counteracting multipath interference in millimeter wave signal transmission, by setting a rotating mechanism, etc., after the automatic air blowing and cleaning of the antenna body is completed, when the annular cover continues to move, the two sealing plates can be driven to continue to move through the rotating mechanism. After the telescopic cover covers the antenna body, when the disk abuts against the side wall of the block, the push rod and the rack cannot continue to move. When the annular cover continues to move, the second spring is deformed. At the same time, the gear can roll on the rack, thereby pushing the gear and the rotating pin to rotate counterclockwise, thereby driving the two sealing plates to rotate closer to each other, and sealing the end of the annular cover. It can seal and protect the antenna body, reduce the influence of impurities such as dust, improve the multipath interference counteracting capability of millimeter wave signal transmission, and at the same time, improve its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a flow chart of the method for counteracting multipath interference of millimeter wave signal transmission in the present invention;

[0025] Figure 2 A schematic diagram of the use status of the millimeter wave signal transmission multipath interference countermeasure device in the present invention;

[0026] Figure 3 It is a schematic diagram of the structure of the millimeter wave signal transmission multipath interference countermeasure device in the present invention;

[0027] Figure 4 It is a partial cross-sectional structural schematic diagram of the rotating cover, the telescopic cover and the annular cover in the present invention;

[0028] Figure 5 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0029] Figure 6 for Figure 3 A schematic diagram of the enlarged structure at B in the middle;

[0030] Figure 7 for Figure 4 Schematic diagram of the enlarged structure at C in the middle;

[0031] Figure 8 for Figure 6 Schematic diagram of the enlarged structure at D in the middle.

[0032] In the figure: 1, antenna body; 201, fixed plate; 202, rotating plate; 203, first motor; 301, moving disk; 302, air inlet pipe; 303, hose; 401, moving rod; 402, first spring; 501, first fixed block; 502, second motor; 503, rotating disk; 504, connecting block; 505, pull rope; 601, support block; 602, rotating pin; 603, rotating block; 701, gear; 702, rack; 801, second fixed block; 802, guide rod; 803, slider; 804, second spring; 901, push rod; 902, disc; 903, stopper; 10, tunnel; 11, mounting seat; 12, rotating cover; 13, telescopic cover; 14, annular cover; 15, blowing hole; 16, sealing plate; 17, rotating rod; 18, adjusting motor. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figure 1-Figure 8 The present invention provides a technical solution: a method for counteracting multipath interference in millimeter wave signal transmission, comprising the following steps:

[0035] S1: Multipath diversity technology: Using different diversity devices at the transmitting and receiving ends, such as space diversity and frequency diversity, can effectively suppress multipath interference and improve the signal-to-noise ratio. The current research focus is on improving the performance of the diversity device, such as reducing the implementation complexity and improving energy efficiency. Future research trends may include new diversity device structures and designs, and the combination of diversity and coding technology;

[0036] S2: Forward error correction coding technology: The use of forward error correction coding in the data modulation stage can effectively reduce the harmful effects caused by multipath. The current forward error correction coding technology is mainly based on Shannon's inequality. New coding technologies and strategies may emerge in the future, such as coding methods based on information theory;

[0037] S3: Signal processing algorithm optimization: Research and design specific signal processing algorithms suitable for millimeter wave communication systems, such as adaptive filtering, space-time adaptive weighting, minimum mean square error (MMSE), etc., which can effectively reduce or eliminate multipath interference. Current research hotspots include algorithm optimization design, real-time online learning, algorithm model correction, etc.

[0038] S4: Antenna design and array configuration optimization: Reasonable design of antenna shape and size, as well as appropriate array layout, can reduce multipath reflection and beam spread, and improve signal focus and signal-to-noise ratio. The current research focuses on innovative antenna design, efficient optimization of array layout, and performance analysis of antennas in multipath environments.

[0039] S5: System-level simulation and verification: Develop a complete millimeter wave communication system, including RF front-end, baseband processing, channel encoding and decoding modules, and perform system-level simulation and actual testing to verify the effectiveness of the proposed methods and equipment. This is a very important link. Only through system-level simulation and testing can we ensure that our design can perform well in actual applications.

[0040] A millimeter wave signal transmission multipath interference countermeasure device comprises an antenna body 1 and a mounting seat 11, wherein a side wall of the mounting seat 11 is rotatably connected to a rotating cover 12 through a rotating mechanism, and an end of the rotating cover 12 is fixedly connected to an adjusting motor 18, an output end of the adjusting motor 18 is fixedly connected to a rotating rod 17, and the other end of the rotating rod 17 passes through the other end of the rotating cover 12 and is fixed to the base of the antenna body 1, an end of the rotating cover 12 is fixedly connected to a telescopic cover 13 arranged in an annular manner, and an end of the telescopic cover 13 is fixedly connected to a hollow annular cover 14, an inner side wall of the annular cover 14 is provided with a plurality of blowing holes 15 arranged in an array, and a side wall of the rotating cover 12 is provided with a plurality of blowing holes 15 arranged in an array, and a side wall of the rotating cover 12 is provided with a plurality of blowing holes 15 arranged in an array, and a plurality of blowing holes 15 arranged in an array are provided in ... The wall is provided with a moving mechanism for moving the annular cover 14, and the rotating cover 12 is provided with an air supply mechanism for supplying air into the annular cover 14, and the side wall of the annular cover 14 is rotatably connected to two symmetrically arranged sealing plates 16 through the rotating mechanism, which is convenient for adjusting the angle and orientation of the antenna body 1, and can improve the millimeter-wave signal transmission multipath interference resistance capability; dust and other impurities attached to the surface of the antenna body 1 can be automatically blown and cleaned, and, when not in use, the antenna body 1 can be sealed and protected to reduce the influence of dust and other impurities, which can improve the millimeter-wave signal transmission multipath interference resistance capability and at the same time, increase its service life.

[0041] The rotating mechanism includes two symmetrically arranged fixed plates 201 fixedly connected to the side walls of the mounting base 11, and the side walls of each fixed plate 201 are rotatably connected to a rotating plate 202 via a rotating shaft, and the rotating plate 202 is fixed to the end of the rotating cover 12. A first motor 203 is fixedly connected to the side wall of one of the fixed plates 201, and the output end of the first motor 203 is fixed to one end of the rotating shaft. When the first motor 203 is started, the rotation of the first motor 203 drives the rotation of the rotating plate 202, thereby driving the rotating cover 12 to rotate, and then driving the antenna body 1 to rotate through the rotating rod 17, so as to facilitate the adjustment of the angle of the antenna body 1.

[0042] The air supply mechanism includes a moving disk 301 slidably connected to the rotating cover 12, and the moving disk 301 is sleeved on the side wall of the rotating rod 17, a moving component is arranged between the moving disk 301 and the annular cover 14, and an air inlet pipe 302 is fixedly inserted into the side wall of the rotating cover 12, a first one-way valve is arranged in the air inlet pipe 302, and the conduction direction of the first one-way valve is from the outside to the rotating cover 12, a hose 303 is fixedly connected between the rotating cover 12 and the annular cover 14, and a second one-way valve is arranged in the hose 303, and the conduction direction of the second one-way valve is from the rotating cover 12 to the annular cover 14. When the antenna body 1 does not need to work, The moving component drives the moving disk 301 to move in the rotating cover 12, and at the same time, drives the annular cover 14 to move in the direction away from the rotating cover 12, the telescopic cover 13 is stretched, and when the moving disk 301 moves, the air temporarily stored in the rotating cover 12 can be squeezed. At the same time, the first one-way valve is closed and the second one-way valve is opened. At this time, the air temporarily stored in the rotating cover 12 can be squeezed and enter the annular cover 14 through the hose 303, and blown out through the blowing hole 15, so that dust and other impurities attached to the surface of the antenna body 1 can be automatically blown and cleaned, which can improve the multipath interference resistance capability of millimeter wave signal transmission.

[0043] The moving component includes a moving rod 401 inserted into the end of the rotating cover 12, and the two ends of the moving rod 401 are respectively fixed to the moving disk 301 and the annular cover 14, the side wall of the moving rod 401 is sleeved with a first spring 402, and the two ends of the first spring 402 are respectively fixed to the moving disk 301 and the end of the rotating cover 12, under the tension of the first spring 402, the moving disk 301 moves in the rotating cover 12.

[0044] The moving mechanism includes a first fixed block 501 fixedly connected to the top of the rotating cover 12, and the side wall of the first fixed block 501 is fixedly connected to the second motor 502, the output end of the second motor 502 is fixedly connected to the rotating disk 503, and the side wall of the rotating disk 503 is fixedly connected to the pull rope 505, the other end of the pull rope 505 is fixedly connected to the connecting block 504, and the connecting block 504 is fixed to the top of the annular cover 14. When the antenna body 1 does not need to work, by starting the second motor 502, the rotation of the second motor 502 drives the rotation of the rotating disk 503, so that the pull rope 505 becomes loose.

[0045] The rotating mechanism includes two symmetrically arranged support blocks 601 fixedly connected to the side walls of the annular cover 14, and the opposite side walls of the two support blocks 601 are rotatably connected to the rotating blocks 603 through the rotating pins 602. The rotating blocks 603 are fixed to the side walls of the sealing plate 16, and the rotation of the rotating pins 602 is driven by the driving mechanism to ensure the normal rotation of the sealing plate 16.

[0046] The driving mechanism includes a gear 701 fixedly sleeved on the side wall of the rotating pin 602, and the top of the support block 601 is connected to a rack 702 through a reset mechanism. The rack 702 is meshed with the gear 701, and the movement of the rack 702 is limited by a limiting mechanism. The rack 702 is pushed to move by the limiting mechanism. After the automatic air blowing and cleaning of the antenna body 1 is completed, when the annular cover 14 continues to move, the two sealing plates 16 can be driven to continue to move through the rotating mechanism. After the telescopic cover 13 covers the antenna body 1, the rack 702 is limited by the limiting mechanism. When the annular cover 14 continues to move, the gear 701 can roll on the rack 702, thereby pushing the gear 701 and the rotating pin 602 to rotate counterclockwise, thereby driving the two sealing plates 16 to rotate close to each other, and sealing the end of the annular cover 14.

[0047] The reset mechanism includes two symmetrically arranged second fixed blocks 801 fixedly connected to the top of the support block 601, and the opposite side walls of the two second fixed blocks 801 are fixedly connected to two symmetrically arranged guide rods 802, and the side wall of each guide rod 802 is sleeved with a slider 803, and the slider 803 is fixed to the rack 702, and the side wall of each guide rod 802 is sleeved with two symmetrically arranged second springs 804, which play a guiding and resetting role for the movement of the rack 702.

[0048] The limiting mechanism includes a push rod 901 fixedly connected to the side wall of the rack 702, and the other end of the push rod 901 is fixedly connected to a disk 902, and the side wall of the push rod 901 is sleeved with a stop block 903, and the stop block 903 is fixed to the side wall of the rotating cover 12. After the automatic blowing and cleaning of the antenna body 1 is completed, when the annular cover 14 continues to move, the two sealing plates 16 can be driven to continue to move through the rotating mechanism. After the telescopic cover 13 covers the antenna body 1, when the disk 902 abuts against the side wall of the stop block 903, the push rod 901 and the rack 702 cannot continue to move.

[0049] Working principle: When in use, after the mounting base 11 is installed and fixed on the inner wall of the tunnel 10, the first motor 203 is started, and the rotation of the first motor 203 drives the rotation of the rotating plate 202, thereby driving the rotating cover 12 to rotate, and then driving the antenna body 1 to rotate through the rotating rod 17, so as to facilitate the adjustment of the angle of the antenna body 1, and the adjustment motor 18 is started, and the rotation of the adjustment motor 18 drives the rotation of the rotating rod 17, thereby driving the antenna body 1 to rotate, so as to facilitate the adjustment of the direction of the antenna body 1, thereby facilitating the adjustment of the angle and direction of the antenna body 1, and can improve the multipath interference resistance capability of millimeter wave signal transmission;

[0050] When the antenna body 1 does not need to work, by starting the second motor 502, the rotation of the second motor 502 drives the rotation of the rotating disk 503, so that the pull rope 505 becomes loose, and under the tension of the first spring 402, the movable disk 301 moves in the rotating cover 12, and at the same time, drives the annular cover 14 to move away from the rotating cover 12, and the telescopic cover 13 is stretched. Moreover, when the movable disk 301 moves, the air temporarily stored in the rotating cover 12 can be squeezed. At the same time, the first one-way valve is closed and the second one-way valve is opened. At this time, the air temporarily stored in the rotating cover 12 can be squeezed and enter the annular cover 14 through the hose 303, and blown out through the blowing hole 15, so that the dust and other impurities attached to the surface of the antenna body 1 can be automatically blown and cleaned, which can improve the multipath interference resistance capability of millimeter wave signal transmission;

[0051] After the automatic blowing and cleaning of the antenna body 1 is completed, when the annular cover 14 continues to move, the two sealing plates 16 can be driven to continue to move through the rotating mechanism. After the telescopic cover 13 covers the antenna body 1, when the disk 902 abuts against the side wall of the block 903, the push rod 901 and the rack 702 cannot continue to move. When the annular cover 14 continues to move, the second spring 804 is deformed. At the same time, the gear 701 can roll on the rack 702, thereby pushing the gear 701 and the rotating pin 602 to rotate counterclockwise, thereby driving the two sealing plates 16 to rotate closer to each other, and sealing the end of the annular cover 14, which can seal and protect the antenna body 1, reduce the influence of impurities such as dust, improve the multipath interference resistance capability of millimeter wave signal transmission, and at the same time, improve its service life.

Claims

1. A method for countering multipath interference in millimeter wave signal transmission, characterized in that: The following steps are involved: S1: Multipath diversity technology: Using different diversity filters at the transmitting and receiving ends can effectively suppress multipath interference and improve the signal-to-noise ratio; S2: Forward error correction coding technology: Forward error correction coding is used in the data modulation stage to effectively reduce the harmful effects caused by multipath; S3: Signal processing algorithm optimization: Research and design specific signal processing algorithms suitable for millimeter wave communication systems, which can effectively reduce or eliminate multipath interference; S4: Antenna design and array configuration optimization: Reasonable design of antenna shape and size, as well as appropriate array layout, can reduce multipath reflection and beam spread, and improve signal focusing and signal-to-noise ratio; S5: System-level simulation and verification: Develop a complete millimeter-wave communication system, including RF front-end, baseband processing, channel encoding and decoding modules, and perform system-level simulation and actual testing to verify the effectiveness of the proposed methods and equipment.

2. Millimeter wave signal transmission multipath interference countermeasure equipment, characterized by: The invention comprises an antenna body (1) and a mounting seat (11), wherein the side wall of the mounting seat (11) is rotatably connected to a rotating cover (12) through a rotating mechanism, and the end of the rotating cover (12) is fixedly connected to an adjusting motor (18), the output end of the adjusting motor (18) is fixedly connected to a rotating rod (17), and the other end of the rotating rod (17) passes through the other end of the rotating cover (12) and is fixed to the base of the antenna body (1), and the end of the rotating cover (12) is fixedly connected to a telescopic cover (17) arranged in an annular manner. 3), and the end of the telescopic cover (13) is fixedly connected to a hollow annular cover (14), the inner side wall of the annular cover (14) is provided with a plurality of blowing holes (15) arranged in an array, and the side wall of the rotating cover (12) is provided with a moving mechanism for moving the annular cover (14), the rotating cover (12) is provided with an air supply mechanism for supplying air to the annular cover (14), and the side wall of the annular cover (14) is rotatably connected to two symmetrically arranged sealing plates (16) through the rotating mechanism.

3. The millimeter wave signal transmission multipath interference countermeasure device according to claim 2, characterized in that: The rotating mechanism comprises two symmetrically arranged fixed plates (201) fixedly connected to the side walls of the mounting seat (11), and the side walls of each fixed plate (201) are rotatably connected to a rotating plate (202) via a rotating shaft, and the rotating plate (202) is fixed to the end of the rotating cover (12), and the side wall of one of the fixed plates (201) is fixedly connected to a first motor (203), and the output end of the first motor (203) is fixed to one end of the rotating shaft.

4. The millimeter wave signal transmission multipath interference countermeasure device according to claim 2, characterized in that: The air supply mechanism comprises a movable disk (301) slidably connected in the rotating cover (12), and the movable disk (301) is sleeved on the side wall of the rotating rod (17), a movable component is arranged between the movable disk (301) and the annular cover (14), and an air intake pipe (302) is fixedly inserted into the side wall of the rotating cover (12), a first one-way valve is arranged in the air intake pipe (302), a hose (303) is fixedly connected between the rotating cover (12) and the annular cover (14), and a second one-way valve is arranged in the hose (303).

5. The millimeter wave signal transmission multipath interference countermeasure device according to claim 4, characterized in that: The moving assembly comprises a moving rod (401) inserted into the end of the rotating cover (12), and the two ends of the moving rod (401) are respectively fixed to the moving disk (301) and the annular cover (14); the side wall of the moving rod (401) is sleeved with a first spring (402), and the two ends of the first spring (402) are respectively fixed to the moving disk (301) and the end of the rotating cover (12).

6. The millimeter wave signal transmission multipath interference countermeasure device according to claim 2, characterized in that: The moving mechanism comprises a first fixed block (501) fixedly connected to the top of the rotating cover (12), and the side wall of the first fixed block (501) is fixedly connected to a second motor (502), the output end of the second motor (502) is fixedly connected to a rotating disk (503), and the side wall of the rotating disk (503) is fixedly connected to a pull rope (505), the other end of the pull rope (505) is fixedly connected to a connecting block (504), and the connecting block (504) is fixed to the top of the annular cover (14).

7. The millimeter wave signal transmission multipath interference countermeasure device according to claim 2, characterized in that: The rotating mechanism comprises two symmetrically arranged supporting blocks (601) fixedly connected to the side wall of the annular cover (14), and the opposite side walls of the two supporting blocks (601) are rotatably connected to a rotating block (603) via a rotating pin (602), the rotating block (603) is fixed to the side wall of the sealing plate (16), and the rotation of the rotating pin (602) is driven by a driving mechanism.

8. The millimeter wave signal transmission multipath interference countermeasure device according to claim 7, characterized in that: The driving mechanism comprises a gear (701) fixedly sleeved on the side wall of the rotating pin (602), and the top of the supporting block (601) is connected to a rack (702) via a reset mechanism, the rack (702) is meshed with the gear (701), and the movement of the rack (702) is limited by a limiting mechanism.

9. The millimeter wave signal transmission multipath interference countermeasure device according to claim 8, characterized in that: The reset mechanism comprises two symmetrically arranged second fixed blocks (801) fixedly connected to the top of the support block (601), and two symmetrically arranged guide rods (802) are fixedly connected to the opposite side walls of the two second fixed blocks (801), and the side wall of each guide rod (802) is sleeved with a slider (803), and the slider (803) is fixed to the rack (702), and the side wall of each guide rod (802) is sleeved with two symmetrically arranged second springs (804).

10. The millimeter wave signal transmission multipath interference countermeasure device according to claim 8, characterized in that: The limiting mechanism comprises a push rod (901) fixedly connected to the side wall of the rack (702), and the other end of the push rod (901) is fixedly connected to a disk (902), and the side wall of the push rod (901) is sleeved with a stopper (903), and the stopper (903) is fixed to the side wall of the rotating cover (12).

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