Non-ground communication network terminal and non-ground network signal noise reduction method

Abstract

The invention provides a non-ground communication network terminal and a non-ground network signal noise reduction method, relates to the technical field of communication, and is used for preventing obstacles from affecting non-ground network communication. The non-ground communication network terminal comprises a non-ground network antenna used for receiving satellite signals; the reflected wave detection antenna is used for detecting a reflected signal; and the noise reduction device is used for filtering the reflected signals detected by the reflected wave detection antenna from the non-ground network signals received by the non-ground network antenna.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of communication, and in particular to a non-terrestrial communication network terminal and a non-terrestrial network signal noise reduction method. BACKGROUND

[0002] The current mobile communication network only covers 20% of the land, 5% of the ocean, and only covers less than 10% of the global area as a whole. A large number of desert and gobi uninhabited areas and other areas have no mobile network signal.

[0003] The non-terrestrial communication system is a set of communication systems for global networking through non-terrestrial communication nodes. Taking the satellite communication system in the non-terrestrial communication system as an example, the satellite communication system can provide communication access services to users on the ground, in the air, and at sea through a certain number of satellites. The satellite communication system has the characteristics of seamless coverage, wide coverage, and long communication distance, and is particularly suitable for remote areas, rural areas, islands, disaster areas, ocean-going ships, and long-haul aircraft, and other areas where land communication is not easy to cover.

[0004] However, the non-terrestrial network signal (for example, satellite signal) of the non-terrestrial communication system is easily affected by environmental factors such as trees, buildings, or mountains during the process of reaching the ground, resulting in poor reception quality of the non-terrestrial network signal. SUMMARY

[0005] The present disclosure provides a non-terrestrial communication network terminal and a non-terrestrial network signal noise reduction method, which can improve the reception quality of the non-terrestrial network signal.

[0006] In a first aspect, the present disclosure provides a non-terrestrial communication network terminal, comprising:

[0007] a non-terrestrial network antenna configured to receive a non-terrestrial network signal;

[0008] a reflected wave detection antenna configured to detect a reflected signal;

[0009] a noise reduction device configured to filter out the reflected signal detected by the reflected wave detection antenna from the non-terrestrial network signal received by the non-terrestrial network antenna.

[0010] In a second aspect, the present disclosure provides a non-terrestrial network signal noise reduction method, which is applied to a non-terrestrial communication network terminal; the non-terrestrial communication network terminal comprises a non-terrestrial network antenna and a reflected wave detection antenna; the method comprises:

[0011] detecting a reflected signal by the reflected wave detection antenna;

[0012] filtering out the reflected signal detected by the reflected wave detection antenna from the non-terrestrial network signal received by the non-terrestrial network antenna.

[0013] In the present disclosure, the non-terrestrial communication network terminal can receive a non-terrestrial network signal by using a non-terrestrial network antenna, detect a reflected signal by using a reflected wave detection antenna, and filter out the reflected signal detected by the reflected wave detection antenna from the non-terrestrial network signal received by the non-terrestrial network antenna by using a noise reduction device, so as to avoid the reflected signal from interfering with a direct signal and improve the reception quality of the non-terrestrial network signal. BRIEF DESCRIPTION OF DRAWINGS

[0014] The accompanying drawings are included to provide a further understanding of the technical solutions of the present application, and constitute a part of the specification, and are used together with the embodiments of the present disclosure to explain the technical solutions of the present application, and do not constitute a limitation on the technical solutions of the present application.

[0015] Figure 1 A satellite signal transmission model schematic diagram provided for the embodiments of the present disclosure;

[0016] Figure 2 A direct signal and a reflected signal schematic diagram provided for the embodiments of the present disclosure;

[0017] Figure 3 An application scenario schematic diagram of a non-terrestrial communication network terminal provided for the embodiments of the present disclosure;

[0018] Figure 4 A top view of a non-terrestrial communication network terminal provided for the embodiments of the present disclosure;

[0019] Figure 5 A shape schematic diagram of a reflected wave detection antenna 20 provided for the embodiments of the present disclosure;

[0020] Figure 6 Front and side view schematic diagrams of a non-terrestrial communication network terminal provided for the embodiments of the present disclosure;

[0021] Figure 7 A shape schematic diagram of a sticking part provided for the embodiments of the present disclosure;

[0022] Figure 8 A rotating component cooperation schematic diagram provided for the embodiments of the present disclosure;

[0023] Figure 9 A reflected signal detection schematic diagram provided for the embodiments of the present disclosure;

[0024] Figure 10 Another top view of a non-terrestrial communication network terminal provided for the embodiments of the present disclosure;

[0025] Figure 11 Another rotating component cooperation schematic diagram provided for the embodiments of the present disclosure;

[0026] Figure 12Another top view of a non-terrestrial communication network terminal provided by embodiments of the present disclosure;

[0027] Figure 13 A flowchart of a non-terrestrial network signal noise reduction method provided by embodiments of the present disclosure;

[0028] Figure 14 A working principle diagram of a non-terrestrial communication network terminal provided by embodiments of the present disclosure;

[0029] Figure 15 A non-terrestrial network signal noise reduction flowchart provided by embodiments of the present disclosure;

[0030] Figure 16 A digital signal processing block diagram provided by embodiments of the present disclosure;

[0031] Figure 17 Another flowchart of a non-terrestrial network signal noise reduction method provided by embodiments of the present disclosure. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present disclosure will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present disclosure.

[0033] Unless otherwise required by context, the term "comprise" and other forms such as "comprises", "comprises", and "comprises" are interpreted as open, inclusive meaning, i.e. "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example", or "some examples" and the like are intended to indicate that the specific features, structures, materials or characteristics associated with that embodiment or example are included in at least one embodiment or example of the present disclosure. The illustrative representation of the above terms does not necessarily mean the same embodiment or example. In addition, the specific features, structures, materials or characteristics described can be included in any one or more embodiments or examples in any appropriate manner.

[0034] The terms "first", "second", etc. are used only for the purpose of description and are not to be interpreted as indicating or implying relative importance or a mandatory or preferred order. Thus, features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present disclosure, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0035] In the embodiments of the present disclosure, the words "exemplarily" or "for example" are used to represent an example, illustration or description. Any embodiment or design scheme described as "exemplarily" or "for example" in the embodiments of the present disclosure should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the words "exemplarily" or "for example" are intended to present the relevant concept in a specific manner.

[0036] In addition, the use of "based on" means open and inclusive, because the process, step, calculation or other action "based on" one or more stated conditions or values can be based on additional conditions or values beyond those stated in practice.

[0037] The network coverage rate proposed by the current operator reaches 99%, which refers to population coverage rate, rather than land coverage rate. From the global perspective, the current mobile communication network only covers 20% of the land, 5% of the ocean, and less than 10% of the global area in total, and a large number of desert and gobi uninhabited areas are without mobile network signals.

[0038] The non-terrestrial communication system is a set of communication systems for global networking through non-terrestrial communication nodes. Taking the satellite communication system in the non-terrestrial communication system as an example, the satellite communication system can provide communication access services to users on the ground, in the air and at sea through a certain number of satellites. The satellite communication system has the characteristics of seamless coverage, wide coverage and long communication distance, and is especially suitable for remote areas, rural areas, islands, disaster areas, ocean-going ships and long-haul aircraft, and other areas where land communication is not easy to cover. Therefore, satellite communication is the core communication technology in the future.

[0039] However, the non-terrestrial network signal of the non-terrestrial communication system is easily affected by environmental factors such as trees, buildings or mountains during the process of reaching the ground, resulting in poor reception quality of the non-terrestrial network signal.

[0040] Exemplarily, taking the satellite communication system in the non-terrestrial communication system as an example, Figure 1 A satellite signal transmission model diagram provided by the embodiments of the present disclosure is shown in FIG. 1. As shown in FIG. 1, the satellite signal transmission model diagram includes a satellite 101, a non-terrestrial communication node 102, a user terminal 103 and a ground terminal 104. Figure 1As shown, the satellite signals transmitted by the satellite can include direct signals and reflected signals, the direct signals are directly transmitted to the non-ground communication network terminal by the satellite, and the reflected signals are reflected to the non-ground communication network terminal by the buildings / mountains or the ground around the non-ground communication network terminal. If the reflected signals enter the satellite antenna of the non-ground communication network terminal, the reflected signals will interfere with the direct signals, so that the observation value of the non-ground communication network terminal deviates from the true value, and a multipath error is generated. Therefore, near high buildings or in the mountains, the satellite signals are usually not received or the reception quality of the satellite signals is poor.

[0041] In combination Figure 1 with the transmission model diagram shown, Figure 2 a direct signal and a reflected signal diagram is provided for the embodiments of the present disclosure. As shown Figure 2 S is the direct signal of the satellite, and S' is the reflected signal. The satellite signals in the satellite antenna reaching the ground satellite terminal are the superimposed signals of S and S'. For the satellite signals, when reaching the ground, they are parallel (i.e., the line segment (referred to as SB) of S shooting to B and the line segment (referred to as SA) of S shooting to A are parallel), it is assumed that a perpendicular line of SB is drawn from point A, and the foot is C, the height of the satellite antenna is H, the distance between the satellite antenna and the building / mountain is L, and the horizontal line where the satellite antenna is located intersects the building / mountain at D. Then, there is a wave path difference Δ and a phase delay θ between the direct signal S and the reflected signal S', which can be specifically represented by the following formula (1) and formula (2):

[0042] Δ = AB - BC = AB · (1 - cos2∠BAD) = 2AB · sin∠BAD 2 Formula (1)

[0043] In formula (1), Δ represents the wave path difference. ∠BAD represents the reflection angle.

[0044]

[0045] In formula (2), θ represents the phase delay. λ represents the wavelength of the satellite signal.

[0046] It is assumed that the signal strength amplitude (or the basic signal strength) of S is U, and the angular frequency is ω, then the signal strength of S can be represented by the following formula (3), and the signal strength of S' can be represented by the following formula (4):

[0047] Q s = U · cos(ωt) Formula (3)

[0048] In formula (3), Q s represents the signal strength of S.

[0049] Q s’=α·U·cos(ωt+θ) Formula (4)

[0050] Formula (4)Q s’ S' represents the signal strength. α represents the reflection coefficient.

[0051] As can be seen from the formula above, the path difference between the reflected signal S' and the direct signal S is greater than 0, and the phase delay is greater than 0. Therefore, when the two signals (or waves) are superimposed, the presence of the reflected signal S' will affect the phase delay and signal strength of the satellite signal, causing distortion and amplitude attenuation of the satellite signal.

[0052] Based on this, the present disclosure provides a non-terrestrial communication network terminal that can detect reflected signals by adding a reflected wave detection antenna and filter out the reflected signals, thereby achieving noise reduction.

[0053] It should be understood that the specific implementations described herein are for interpreting this disclosure only and are not intended to limit this disclosure.

[0054] The technical solutions provided in this disclosure can be applied to various mobile communication networks, such as 5G new radio (NR) mobile communication networks, future mobile communication networks, such as 6G mobile communication networks, or multiple communication convergence systems, etc. This disclosure does not limit them.

[0055] Combination Figure 1 The diagram shown illustrates the transmission model. Figure 3 This is a schematic diagram illustrating an application scenario of the non-terrestrial communication network terminal provided in an embodiment of this disclosure. For example... Figure 3 As shown, the non-terrestrial communication network terminal provided in this embodiment can be used to access non-terrestrial networks in areas where terrestrial mobile communication systems cannot provide coverage. Figure 3 (Example: a satellite network connected by satellite, and through handheld terminal products) Figure 3 (Using a mobile phone as an example) It connects to enable functions such as making calls, sending text messages, and accessing the internet.

[0056] As an example, a non-terrestrial communication network terminal can be a terminal carried by the user. The user can carry the non-terrestrial communication network terminal with them and place it at a certain location to access the non-terrestrial communication network.

[0057] As another example, a non-terrestrial communication network terminal can also be a facility built on the ground. Users active near the non-terrestrial communication network terminal can access the non-terrestrial communication network through the non-terrestrial communication network terminal.

[0058] For example, taking a mobile phone as an example of a handheld terminal product, the mobile phone can be installed with a non-ground network communication application (APP) related to the non-ground communication network terminal, and the mobile phone can specifically connect with the non-ground communication network terminal through the communication application.

[0059] It should be noted that the above Figure 3 Satellite communication system is taken as an example for illustration. The non-ground communication network terminal can also be used to receive signals transmitted by non-ground communication nodes of other non-ground communication systems. For example, the non-ground communication network terminal can also be used to receive signals transmitted by other high-altitude or high-sky platforms such as unmanned aerial vehicles, hot air balloons, and high-altitude airships.

[0060] Figure 4 A top view of the non-ground communication network terminal provided by the embodiment of the present disclosure is shown in FIG. 1. As shown in FIG. 1, the non-ground communication network terminal includes: Figure 4

[0061] A non-ground network antenna 10 for receiving non-ground network signals.

[0062] The non-ground network antenna 10 can be a circularly polarized antenna, and the non-ground network signals received by the non-ground network antenna 10 can include direct signals and reflected signals. For example, the non-ground network antenna 10 can be a satellite antenna 10, and the received non-ground network signals can be satellite signals.

[0063] A reflected wave detection antenna 20 for detecting reflected signals.

[0064] The reflected wave detection antenna 20 can include one or more antennas (for example, two antennas are taken as an example in the embodiment of the present disclosure). Figure 4

[0065] The reflected wave detection antenna 20 can be a circularly truncated antenna (or an N-th part of a circularly truncated antenna, N is a positive integer, for example, a half circularly truncated antenna, a third circularly truncated antenna, or a quarter circularly truncated antenna, etc.), a rectangular antenna, or a cylindrical antenna (or a partial cylindrical antenna) obtained by extending a circular ring downward in the plane. The embodiment of the present disclosure does not limit the specific shape of the reflected wave detection antenna 20.

[0066] Exemplarily, Figure 5 A shape diagram of the reflected wave detection antenna 20 provided by the embodiment of the present disclosure is shown in FIG. 2. As shown in FIG. 2, from the perspective of top view, the shape of the reflected wave detection antenna 20 can be a partial circular ring. Figure 5 A noise reduction device (for example, a noise reduction device 30) for reducing noise of the reflected wave detection antenna 20.

[0067] Figure 3 ​​​The noise reduction device is configured to filter out the reflected signal detected by the reflected wave detection antenna from the non-terrestrial network signal received by the non-terrestrial network antenna.

[0068] For example, the noise reduction device can first calculate the path difference between the direct signal and the reflected signal, then calculate the phase delay according to the path difference, and finally filter out the reflected signal with the phase delay from the non-terrestrial network signal.

[0069] In some possible embodiments, as described above, the reflected wave detection antenna 20 can include a plurality of (antennas), in which case the noise reduction device can be configured to filter out the reflected signal detected by each of the plurality of reflected wave detection antennas from the non-terrestrial network signal received by the non-terrestrial network antenna 10.

[0070] In some embodiments, please continue to refer to the above Figure 4 The non-terrestrial communication network terminal can further include a reflected wave detection antenna interface 30, through which the reflected wave detection antenna 20 can communicate with other electronic devices of the non-terrestrial communication network terminal.

[0071] In some embodiments, the non-terrestrial communication network terminal can further include an isolation plate 40, which is arranged between the antennas (including the above-mentioned non-terrestrial network antenna 10 and the reflected wave detection antenna 20) and other electronic devices of the non-terrestrial communication network terminal, and is configured to shield the reflected signal reflected from the bottom of the non-terrestrial communication network terminal, and to isolate electromagnetic interference between the antennas (including the above-mentioned non-terrestrial network antenna 10 and the reflected wave detection antenna 20) and other electronic devices of the non-terrestrial communication network terminal. The non-terrestrial network antenna 10 and the reflected wave detection antenna 20 can be arranged on the isolation plate.

[0072] For example, the other electronic devices can include a radio frequency module, etc.

[0073] In some embodiments, in order to avoid the non-terrestrial network antenna 10 blocking the reflected wave detection antenna 20 from detecting the reflected signal, the reflected wave detection antenna 20 can be arranged on the periphery of the non-terrestrial network antenna 10. In this case, please continue to refer to the above Figure 4 As shown in the front view and the side view of the non-terrestrial communication network terminal provided by the embodiments of the present disclosure,

[0074] In some embodiments, Figure 6 The front view and the side view of the non-terrestrial communication network terminal provided by the embodiments of the present disclosure, Figure 6 (a) in the front view is a front view of the non-terrestrial communication network terminal, Figure 6 (b) in the side view is a side view of the non-terrestrial communication network terminal.

[0075] like Figure 6 As shown in (a) above, Figure 4 The reflected wave detection antenna 20 shown includes two antennas: reflected wave detection antenna 21 and reflected wave detection antenna 22. Taking a non-terrestrial communication network terminal including a reflected wave detection antenna interface 30 as an example, in the main view, from top to bottom, one can see the non-terrestrial network antenna 10, the reflected wave detection antenna 20 (a reflected wave detection antenna 21 with a half-truncated cone shape and a reflected wave detection antenna 22 with another half-truncated cone shape), the reflected wave detection antenna interface 30, and the isolation plate 40. There is a certain angle between the side (or signal receiving plane) of the reflected wave detection antenna 20 and the non-terrestrial network antenna 10 or the isolation plate 40.

[0076] like Figure 6 As shown in (b) of the figure, in the side view (taking the left view as an example), the non-terrestrial network antenna 10, the reflected wave detection antenna 22, and the isolation plate 40 can be seen from top to bottom. There is a certain angle between the side (or signal receiving plane) of the reflected wave detection antenna 22 and the non-terrestrial network antenna 10 or the isolation plate 40.

[0077] In some embodiments, the non-terrestrial communication network terminal may further include a rotating component and a driving component. The reflected wave detection antenna 20 and the isolation plate can be rotatably connected via the rotating component. The rotation axis of the rotating component is parallel to the signal receiving plane of the reflected wave detection antenna 20, or the rotation axis is located on the same plane as the signal receiving plane of the reflected wave detection antenna 20.

[0078] As an example, the rotating component can be implemented as a hinge (also called a latch) or a rotor, etc. This disclosure does not limit the specific form of the rotating component. Here, a rotor refers to a rotating body supported by bearings.

[0079] A driving component is used to drive the signal receiving plane of the reflected wave detection antenna 20 to rotate about the rotation axis of the rotating component.

[0080] In some embodiments, the reflected wave detection antenna 20 may further include a fixed substrate and a reflected wave detection antenna body disposed on the fixed substrate. The fixed substrate may be rotatably connected to the isolation plate 40 via a rotating assembly.

[0081] For example, the reflected wave detection antenna body can be glued to the fixed substrate, soldered to the fixed substrate, threaded to the fixed substrate, or snap-fitted to the fixed substrate. This disclosure does not limit the method of fixing the reflected wave detection antenna body and the fixed substrate.

[0082] The shape of the fixed substrate may be the same as or different from the bottom surface shape of the reflected wave detection antenna body. When the shape of the fixed substrate differs from the bottom surface shape of the reflected wave detection antenna body, the area of ​​the fixed substrate may be larger than, equal to, or smaller than the bottom surface area of ​​the reflected wave detection antenna body. This disclosure does not impose any limitations on this aspect.

[0083] For example, taking the reflected wave detection antenna body being attached to a fixed substrate as an example, the fixed substrate can be understood as an attachment part. In this case, Figure 7 This is a schematic diagram showing the shape of the adhesive portion provided in an embodiment of this disclosure. (See diagram below.) Figure 7 As shown above, Figure 4 Taking the reflected wave detection antenna 20 as an example, which includes two antennas, reflected wave detection antenna 21 and reflected wave detection antenna 22, reflected wave detection antenna 21 may include a reflected wave detection antenna body and an adhesive part 51 for attaching the reflected wave detection antenna body. Reflected wave detection antenna 22 may include a reflected wave detection antenna body and an adhesive part 52 for attaching the reflected wave detection antenna body. The adhesive part 51 and the adhesive part 52 may be separated by a reflected wave detection antenna interface 30.

[0084] In some possible embodiments, the aforementioned driving assembly may include a telescopic support arm. One end of the telescopic support arm is rotatably connected to the reflected wave detection antenna body in the reflected wave detection antenna 20, or rotatably connected to a fixed substrate, and the other end of the telescopic support arm may be connected to the isolation plate 40. The telescopic support arm can be used to extend and retract, driving (or pushing against) the signal receiving plane of the reflected wave detection antenna body to rotate around the rotation axis of the rotating assembly, thereby changing the elevation angle of the reflected wave detection antenna 20.

[0085] In one possible implementation, a slide rail can also be provided radially on the isolation plate 40, and the other end of the telescopic support arm can be supported in the slide rail so that the other end of the telescopic support arm can slide radially along the slide rail on the isolation plate 40.

[0086] For example, a pulley can be provided at the other end of the telescopic support arm. The pulley can be supported in a slide rail and slide in the slide rail, thereby driving the other end of the telescopic support arm to slide radially in the isolation plate 40.

[0087] In another possible implementation, the non-terrestrial communication network terminal may also include a resilient connector. The other end of the telescopic support arm can be resiliently connected to the isolation plate 40 via this resilient connector.

[0088] For example, the elastic connector can be a spring, a spring tube, or a rubber elastic joint, etc. This disclosure does not limit the specific implementation of the elastic connector.

[0089] In yet another possible implementation, the non-terrestrial communication network terminal can further comprise a rotating connection. The other end of the telescopic support arm can be rotatably connected to the isolation plate 40 via the rotating connection.

[0090] For example, the rotating connection can be a bearing or a bushing, etc. Taking the bearing as an example, the outer ring of the bearing can be fixedly connected to the isolation plate 40, and the inner ring of the bearing can be fixedly connected to the other end of the telescopic support arm.

[0091] As an example, the pitch angle of the reflected wave detection antenna 20 can be understood as the angle between the normal vector of the signal detection plane of the reflected wave detection antenna 20 and the ground.

[0092] As an example, the driving assembly can further comprise a driving motor and a speed reduction mechanism for driving the telescopic support arm to telescope. The inside of the telescopic support arm can be fixedly connected (for example, welded) with a rack, the rack is engaged with the output gear of the speed reduction mechanism, and the input gear of the speed reduction mechanism is engaged with the output gear of the driving motor. The non-terrestrial communication network terminal (or the above-mentioned noise reduction device) can control the driving motor to rotate forward or reverse, drive the output gear of the speed reduction mechanism to rotate, drive the rack engaged with the output gear of the speed reduction mechanism to rise or fall, thereby driving the telescopic support arm fixedly connected with the rack to lengthen or shorten, and driving the reflected wave detection antenna 20 to rotate along the rotation axis of the rotating assembly, so as to change the pitch angle of the reflected wave detection antenna 20.

[0093] As another example, the fixed part of the telescopic support arm can be fixedly connected with a lead screw, the lead screw comprises a helical groove, and the sliding part (i.e., the part that can telescope) of the telescopic support arm is connected with a nut, the inside of the nut has a thread matched with the helical groove of the lead screw. When the lead screw rotates, the nut will move linearly along the lead screw. The driving motor can drive the lead screw to rotate through the speed reduction mechanism, thereby driving the nut to rise or fall along the lead screw, thereby driving the telescopic support arm to lengthen or shorten, and driving the reflected wave detection antenna 20 to rotate along the rotation axis of the rotating assembly, so as to change the pitch angle of the reflected wave detection antenna 20.

[0094] Exemplarily, Figure 8 A rotating assembly cooperation schematic diagram is provided for the embodiments of the present disclosure. As Figure 8 shown, the same as the above Figure 6 reflected wave detection antennas 21 and 22 shown in the two half-round table, the reflected wave detection antennas 21 and 22 can be pasted on the pasting part 50 of the rotating assembly.

[0095] The reflected wave detection antennas 21 and 22 can be respectively fixedly connected with telescopic support arms Figure 8The black thick solid line is exemplified in the middle. The movable cavity (not shown in the middle) can be opened in the reflection wave detection antenna 21 and the reflection wave detection antenna 22 to support the movable support arm to move. Figure 8 The movable support arm can be retracted in the movable cavity (not shown in the middle), and the reflection wave detection antenna 21 and the reflection wave detection antenna 22 are driven (for example, the bottom end is pressed against the isolation plate, and the top end is pressed against the reflection wave detection antenna 21 or 22) to rotate along the rotation axis (exemplified by a small circle in the middle) of the respective rotation assembly (exemplified by a double-headed arrow in the middle) to change the pitch angle (exemplified by a double-headed arrow in the middle) of the reflection wave detection antenna 21 and the reflection wave detection antenna 22. Figure 8 The pitch angle of the reflection wave detection antenna 21 is α angle, and the pitch angle of the reflection wave detection antenna 22 is β angle (exemplified in the middle). Figure 8 The rotation direction of the reflection wave detection antenna 21 and the reflection wave detection antenna 22 is exemplified by a double-headed arrow in the middle), to change the pitch angle (exemplified by a double-headed arrow in the middle) of the reflection wave detection antenna 21 and the reflection wave detection antenna 22. Figure 8 The pitch angle of the reflection wave detection antenna 21 is α angle, and the pitch angle of the reflection wave detection antenna 22 is β angle (exemplified in the middle).

[0096] In other possible embodiments, the rotation assembly can include a rotating shaft and a rotating hole. The rotating shaft is fixedly connected with the fixed base plate. The rotating hole is arranged on the isolation plate 40. The rotating shaft is carried in the rotating hole. The rotating shaft is integrally formed or fixedly connected with a gear. The driving assembly can include a driving motor and a speed reduction mechanism. The gear on the rotating shaft is engaged with the output gear in the speed reduction mechanism, and the input gear in the speed reduction mechanism is engaged with the output gear of the driving motor. The non-terrestrial communication network terminal (or the above-mentioned noise reduction device) can drive the rotating shaft of the rotation assembly to rotate by controlling the driving motor to rotate forward or reverse, thereby driving the reflection wave detection antenna body on the fixed base plate to rotate around the rotating shaft of the rotation assembly.

[0097] Exemplarily, Figure 9 The reflection signal detection schematic diagram provided by the embodiments of the present disclosure is shown. As Figure 9 shown, assuming that the signal receiving point of the non-terrestrial network antenna 10 is B, and the direct signal S directly reaches B. The reflected signal S' reaches B through reflection at the reflection point A, and AC is perpendicular to BC. According to the understanding of the above formula (1), the wave path difference Δ of S and S' is Δ = AB-BC = AB·(1-cos2∠BAD). S" is another reflected signal passing through an obstacle, the reflection point is A', and the signal receiving point B' of the reflection signal detection antenna 20 is reflected, AB / / A'B', A'B' is perpendicular to B'E, and ∠BAE = ∠B'A'E, so Δ = AB·(1-cos2∠B′A′D), FO is the isolation plate, so the non-terrestrial communication network terminal can adjust the pitch angle of the reflection wave detection antenna 20, or the size of ∠B'OF, so that the signal receiving plane of the reflection wave detection antenna 20 is perpendicular to the reflected signal, so that the reflection point A' is infinitely close to A, and at this time the reflected signal detected by the reflection wave detection antenna 20 is the main interference signal interfering with the non-terrestrial network signal, and filtering out the reflected signal at this time helps to improve the reception quality of the non-terrestrial network signal.

[0098] The non-terrestrial communication network terminal provided by the embodiments of the present disclosure can receive non-terrestrial network signals by using the non-terrestrial network antenna, detect reflected signals by using the reflected wave detection antenna, and filter the reflected signals detected by the reflected wave detection antenna from the non-terrestrial network signals received by the non-terrestrial network antenna by using the noise reduction device, so as to avoid the interference of the reflected signals on the direct signals and improve the reception quality of the non-terrestrial network signals.

[0099] In addition, in the non-terrestrial communication network terminal provided by the embodiments of the present disclosure, the reflected wave detection antenna can also be rotationally connected with the isolation plate. The rotation axis of the rotation assembly is parallel to the signal receiving plane of the reflected wave detection antenna, or the rotation axis is located on the same plane as the signal receiving plane of the reflected wave detection antenna. The signal receiving plane of the reflected wave detection antenna is driven to rotate around the rotation axis of the rotation assembly by the driving assembly, so as to change the pitch angle of the reflected wave detection antenna and scan reflected signals in different directions.

[0100] In some possible embodiments, as described above, the reflected wave detection antenna 20 can rotate along the rotation axis of the rotation assembly to change the pitch angle (or direction) of the reflected wave detection antenna 20. In the case that the non-terrestrial network cannot be registered, the noise reduction device can also adjust the direction of the reflected wave detection antenna 20 to scan and filter different reflected signals, so as to improve the registration of the non-terrestrial network. That is, the noise reduction device can also be used to adjust the direction of the reflected wave detection antenna 20 to detect different reflected signals in response to the current non-terrestrial network registration failure, and then filter the reflected signals detected each time from the non-terrestrial network signals received by the non-terrestrial network antenna 10, until the non-terrestrial network is successfully registered.

[0101] For example, due to the uneven surface of the mountain or high building and the inconsistent surface reflection coefficient, the intensity of the reflected signal is also inconsistent when the reflected wave detection antenna 20 is rotated. The delay phase is also different. It can be defaulted that the reflected wave detection antenna 20 forms a 45° angle with the isolation plate (that is, the ∠B’OF shown in the above Figure 9 The noise reduction device can adopt a polling query scanning cycle mode to make the ∠B’OF shown in the above Figure 9 cycle from 0° to 90°, until the non-terrestrial network can be normally registered, and stop adjusting the ∠B’OF. When the ∠B’OF is rotated from 0° to 90° and still cannot register the non-terrestrial network, the non-terrestrial communication network terminal can send notification information to the communication application installed in the handheld terminal product, notifying that the non-terrestrial network signal is poor and the non-terrestrial network cannot be registered.

[0102] In some other possible embodiments, the noise reduction device can also adjust the direction of the reflected wave detection antenna 20 to scan and filter out different reflected signals to improve the non-terrestrial network signal strength when the non-terrestrial network signal strength is low. That is, the noise reduction device can also be configured to, in response to the current non-terrestrial network signal strength being lower than the strength threshold, adjust the direction of the reflected wave detection antenna 20 to detect different reflected signals, and sequentially filter out each detected reflected signal from the non-terrestrial network signal received by the non-terrestrial network antenna 10 until the non-terrestrial network signal strength is higher than the strength threshold.

[0103] The strength threshold can be preset in the non-terrestrial communication network terminal or the noise reduction device. For example, the strength threshold can be set to -85 decibel-milliwatts (dBm), -90 dBm, or -95 dBm, etc. The specific value of the strength threshold is not limited in the embodiments of the present disclosure.

[0104] In some other possible embodiments, after improving the network registration of the non-terrestrial network, the noise reduction device can also continue to detect the non-terrestrial network signal strength and improve the non-terrestrial network signal strength when the non-terrestrial network signal is low. That is, the noise reduction device can also be configured to, in response to the current non-terrestrial network being unable to be registered, adjust the direction of the reflected wave detection antenna 20 to detect different reflected signals, and sequentially filter out each detected reflected signal from the non-terrestrial network signal received by the non-terrestrial network antenna 10 until the non-terrestrial network is successfully registered; determine whether the current non-terrestrial network signal strength is lower than the strength threshold; if yes, adjust the direction of the reflected wave detection antenna 20 to detect different reflected signals, and sequentially filter out each detected reflected signal from the non-terrestrial network signal received by the non-terrestrial network antenna 10 until the non-terrestrial network signal strength is higher than the strength threshold, and return to register the non-terrestrial network; and if no, the current direction of the reflected wave detection antenna 20 can be maintained.

[0105] In some embodiments, as described above, the reflected wave detection antenna 20 can include multiple, and the shape of the reflected wave detection antenna 20 can be rectangular. In this case, Figure 10 Another top view of the non-terrestrial communication network terminal provided by the embodiments of the present disclosure is shown in FIG. 6. As shown in FIG. 6, two rectangular reflected wave detection antennas 20 (i.e., the reflected wave detection antenna 23 and the reflected wave detection antenna 24 in FIG. 5) can be respectively arranged on the left and right sides of the non-terrestrial network antenna 10. Figure 10 Figure 10

[0106] Figure 11 Another cooperation diagram of the rotating assembly provided by the embodiments of the present disclosure is shown in FIG. 7. As shown in FIG. 7, the above-mentioned Figure 11 Figure 10 ​​​Taking the fixed substrate 53 in the reflected wave detection antenna 23 on the right side of the China-Africa terrestrial network antenna 10 as an example, assuming that the fixed substrate 53 and the reflected wave detection antenna body of the reflected wave detection antenna 23 have the same shape, both being rectangular, then in Figure 11 From the front view perspective, the fixed base plate 53 can be represented as a line segment, and a telescopic support arm can be rotatably connected to the top of the fixed base plate 53. Figure 11 (As shown by the thick black solid line in the image), the telescopic support arm can extend or shorten, driving the reflected wave detection antenna 23 along the rotation axis of the rotating assembly. Figure 11 (The small circle is shown as an example) rotates to change the elevation angle of the reflected wave detection antenna 23. Figure 11 The direction of rotation of the reflected wave detection antenna 23 is illustrated by a bidirectional arrow.

[0107] In other embodiments, to enable the rectangular reflected wave detection antenna 20 to detect reflected signals from multiple directions, more rectangular reflected wave detection antennas 20 can be installed in the non-terrestrial communication network terminal. In this case, Figure 12 This is yet another top view of a non-terrestrial communication network terminal provided in an embodiment of this disclosure. (See also...) Figure 12 As shown, four rectangular reflected wave detection antennas 20 can be respectively set above, below, left, and right of the non-terrestrial network antenna 10 (i.e., Figure 10 The four rectangular antennas 20 (25, 26, 27, and 28) are used to detect reflected signals within a 360° range around the non-terrestrial network antenna 10.

[0108] Based on the understanding of the above embodiments, the present disclosure further provides a method for noise reduction of non-terrestrial network signals, which can be applied to the above-mentioned non-terrestrial communication network terminals. Figure 13 This is a schematic flowchart illustrating a non-terrestrial network signal noise reduction method provided in an embodiment of this disclosure. Figure 13 As shown, the method includes the following steps:

[0109] S101. Detect the reflected signal using a reflected wave detection antenna.

[0110] The shape and installation position of the reflected wave detection antenna can be referred to in the above embodiments, and will not be repeated here.

[0111] S102. Filter out the reflected signal detected by the reflected wave detection antenna from the non-terrestrial network signal received from the non-terrestrial network antenna.

[0112] In some possible embodiments, as described above, the reflected wave detection antenna (reflected wave detection antenna 20) can include multiple (antennas). In this case, the above S102 can specifically include: filtering out the reflected signal detected by each of the multiple reflected wave detection antennas from the non-terrestrial network signal received by the non-terrestrial network antenna.

[0113] In some embodiments, as described above, the reflected wave detection antenna can change the elevation angle. The non-terrestrial communication network terminal can improve the registration of the non-terrestrial network by changing the elevation angle of the reflected wave detection antenna to filter out different reflected signals. In this case, the method can further include the following steps:

[0114] Step 1a, in response to determining that the non-terrestrial network cannot be currently registered, adjusting the direction of the reflected wave detection antenna to detect different reflected signals.

[0115] Step 2a, filtering out the reflected signal detected each time from the non-terrestrial network signal received by the non-terrestrial network antenna in turn until the non-terrestrial network is successfully registered.

[0116] The specific process of step 1a and step 2a can refer to the description in the above embodiments, which will not be repeated here.

[0117] In other embodiments, in the case of low non-terrestrial network signal strength, the non-terrestrial communication network terminal can also adjust the direction of the reflected wave detection antenna 20 to scan and filter out different reflected signals, thereby improving the non-terrestrial network signal strength. In this case, the method can further include the following steps:

[0118] Step 1b, in response to determining that the current non-terrestrial network signal strength is lower than the strength threshold, adjusting the direction of the reflected wave detection antenna to detect different reflected signals.

[0119] Step 2b, filtering out the reflected signal detected each time from the non-terrestrial network signal received by the non-terrestrial network antenna in turn until the non-terrestrial network signal strength is higher than the strength threshold.

[0120] The specific process of step 1b and step 2b can refer to the description in the above embodiments, which will not be repeated here.

[0121] Based on the understanding of the above embodiments, taking a satellite communication system as an example, Figure 14 A non-terrestrial communication network terminal working principle diagram is provided for the embodiments of the present disclosure. As shown in Figure 14As shown, the raw satellite signal received by the satellite antenna can be selected by a signal selector / switch (SW) to select one or more signals. The signals are then amplified and noise reduced by a low noise amplifier (LNA) to obtain the satellite signal received by the satellite antenna. Reflected wave detection antenna ( Figure 14 (Taking two reflection wave detection antennas, antenna 1 and antenna 2, as examples, the original reflected signal detected can be amplified and noise reduced by an LNA to obtain the reflected signal detected by the reflection wave detection antenna. The signal processing module can demodulate and decode the satellite signal received by the satellite antenna and the reflected signal detected by the reflection wave detection antenna. Then, the filtering module filters out the reflected signal from the satellite signal, and a surface acoustic wave (SAW) filter further filters the signal to improve its clarity and accuracy. During signal processing, the direction of the reflection wave detection antenna can also be adjusted to detect different reflected signals.)

[0122] Based on the understanding of the above embodiments, taking a satellite communication system as an example, Figure 15 This is a flowchart illustrating the non-terrestrial network signal noise reduction process provided in an embodiment of this disclosure. Figure 15 As shown, a non-terrestrial communication network terminal can first search for satellite signals, receive satellite signals through a satellite antenna, initialize the direction of the reflected wave detection antenna, receive reflected signals through the reflected wave detection antenna, perform signal processing on the satellite signal and reflected signal, and determine whether it can register with the satellite network. If so, it registers with the satellite network and determines whether the signal quality is good; if not, it determines whether it can adjust the direction of the reflected wave detection antenna. If it can be adjusted, it adjusts the direction of the reflected wave detection antenna and continues to receive reflected signals through the reflected wave detection antenna; if it cannot be adjusted, it cannot register with the satellite network. If the signal quality is good, it maintains the current direction of the reflected wave detection antenna; if the signal quality is poor, it adjusts the direction of the reflected wave detection antenna and continues to receive reflected signals through the reflected wave detection antenna.

[0123] Based on the understanding of the above embodiments, taking a satellite communication system as an example, Figure 16 This is a block diagram of digital signal processing provided for embodiments of this disclosure. Figure 16 As shown, when filtering out reflected signals, non-terrestrial communication network terminals can first calculate the path difference between the reflected signal and the direct signal, then calculate the phase delay of the reflected signal, and finally filter out the reflected signal with the phase delay from the satellite signal.

[0124] Based on the understanding of the above embodiments, the non-terrestrial communication network terminal provided in this disclosure can also manually adjust the direction of the reflected wave detection antenna. Taking a satellite communication system as an example, Figure 17Another flowchart of the non-terrestrial network signal noise reduction method provided by the embodiments of the present disclosure is shown in FIG. 6. As shown in FIG. 6, the non-terrestrial communication network terminal can first search for a satellite signal, receive the satellite signal through a satellite antenna, initialize the direction of the reflected wave detection antenna, the user can estimate the direction of the reflected wave detection antenna according to the surrounding obstacles, manually adjust the direction of the reflected wave detection antenna, receive the reflected signal through the reflected wave detection antenna, perform signal processing on the satellite signal and the reflected signal, determine whether to register the satellite network, if yes, register the satellite network and determine whether the signal quality is good; if not, manually adjust the direction of the reflected wave detection antenna again; if the signal quality is good, keep the current direction of the reflected wave detection antenna, if the signal quality is poor, manually adjust the direction of the reflected wave detection antenna again. Figure 17

[0125] For example, by default, the reflected wave detection antenna can form a 45° angle with the isolation plate, when performing satellite communication services, the user can estimate the direction of the reflected wave detection antenna according to the surrounding obstacles, and then manually adjust the angle of the reflected wave detection antenna, so that the reflected wave detection antenna forms an acute angle with the surrounding obstacles, and the above Figure 9 For example, by default, the reflected wave detection antenna can form a 45° angle with the isolation plate, when performing satellite communication services, the user can estimate the direction of the reflected wave detection antenna according to the surrounding obstacles, and then manually adjust the angle of the reflected wave detection antenna, so that the reflected wave detection antenna forms an acute angle with the surrounding obstacles, and the above

[0126] Although the present disclosure is described herein in conjunction with various embodiments, other variations of the disclosed embodiments can be understood and implemented by those skilled in the art with reference to the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "one" does not exclude a plurality. Recitation of measures in mutually different dependent claims does not indicate that these measures cannot be combined, and the combination of these measures can produce an even better result.

[0127] ​Although the present disclosure has been described with reference to specific features and embodiments thereof, it is evident that various modifications and combinations can be made thereto without departing from the spirit and scope of the disclosure. The specification and drawings should be regarded as illustrative only and are not intended to limit the scope of the disclosure. Accordingly, any and all modifications, variations or equivalent arrangements which fall within the scope of the present disclosure should be intended to be embraced therein. As such, it is intended that the application claims be construed in accordance with the full scope of the appended claims and their equivalents.

[0128] The above description is merely illustrative of the disclosure and is not intended to limit the scope of the disclosure. Any variation or modification which falls within the scope of the disclosure should be considered as falling within the scope of the disclosure. Therefore, the scope of the disclosure should be determined by the scope of the claims.

Claims

1. A non-terrestrial communication network terminal, characterized by, The non-ground communication network terminal comprises: a non-ground network antenna configured to receive a non-ground network signal; a reflected wave detection antenna configured to detect a reflected signal; a noise reduction device configured to filter out the reflected signal detected by the reflected wave detection antenna from the non-ground network signal received by the non-ground network antenna.

2. The non-ground communication network terminal of claim 1, wherein: the noise reduction device is further configured to adjust a direction of the reflected wave detection antenna to detect a different reflected signal in response to determining that the non-ground network is currently unavailable for registration; and sequentially filter out each detected reflected signal from the non-ground network signal received by the non-ground network antenna until the non-ground network is successfully registered.

3. The non-ground communication network terminal of claim 1, wherein: the noise reduction device is further configured to adjust a direction of the reflected wave detection antenna to detect a different reflected signal in response to determining that a current non-ground network signal strength is lower than a strength threshold; and sequentially filter out each detected reflected signal from the non-ground network signal received by the non-ground network antenna until the non-ground network signal strength is higher than the strength threshold.

4. The non-terrestrial communication network terminal of claim 1, wherein, The non-ground communication network terminal further comprises an isolation plate arranged between an antenna and other electronic devices of the non-ground communication network terminal, and configured to isolate electromagnetic interference between the antenna and the other electronic devices; the antenna comprises the satellite antenna and the reflected wave detection antenna.

5. The non-ground communication network terminal of claim 4, wherein: a first orthogonal projection of the reflected wave detection antenna on the isolation plate is located on a circumferential side of a second orthogonal projection of the non-ground network antenna on the isolation plate.

6. The non-terrestrial communication network terminal of claim 4, wherein, The non-ground communication network terminal further comprises a rotating assembly and a driving assembly; the reflected wave detection antenna is rotatably connected to the isolation plate via the rotating assembly; an axis of rotation of the rotating assembly is parallel to a signal receiving plane of the reflected wave detection antenna, or the axis of rotation and the signal receiving plane are located on the same plane; the driving assembly is configured to drive the signal receiving plane of the reflected wave detection antenna to rotate around the axis of rotation of the rotating assembly to change an elevation angle of the reflected wave detection antenna.

7. The non-ground communication network terminal of claim 6, wherein: the reflected wave detection antenna comprises a fixed substrate and a reflected wave detection antenna body arranged on the fixed substrate; the fixed substrate is rotatably connected to the isolation plate via the rotating assembly.

8. The non-terrestrial communication network terminal of claim 7, wherein, the driving assembly comprises a telescopic support arm; one end of the telescopic support arm is rotatably connected to the reflected wave detection antenna body or the fixed substrate; the other end of the telescopic support arm is connected to the isolation plate; the telescopic support arm is configured to be telescopically extended or retracted to drive the signal receiving plane of the reflected wave detection antenna body arranged on the fixed substrate to rotate around the axis of rotation to change the elevation angle of the reflected wave detection antenna.

9. The non-terrestrial communication network terminal of claim 1, wherein, the reflected wave detection antenna comprises a plurality of The noise reduction device is configured to filter out the reflected signal detected by each of the plurality of reflected wave detection antennas from the non-ground network signal received by the non-ground network antenna.

10. A non-terrestrial network signal noise reduction method, comprising: The method is applied to a non-ground communication network terminal; The non-ground communication network terminal comprises a non-ground network antenna and a reflected wave detection antenna; and the method comprises: detecting a reflected signal by the reflected wave detection antenna; filtering out the reflected signal detected by the reflected wave detection antenna from the non-ground network signal received by the non-ground network antenna.

11. The method of claim 10, wherein, The method further comprises: in response to determining that the non-ground network cannot be registered at present, adjusting the direction of the reflected wave detection antenna to detect a different reflected signal; sequentially filtering out each detected reflected signal from the non-ground network signal received by the non-ground network antenna until the non-ground network is successfully registered.

12. The method of claim 10, wherein, The method further comprises: in response to determining that the current non-ground network signal strength is lower than a strength threshold, adjusting the direction of the reflected wave detection antenna to detect a different reflected signal; sequentially filtering out each detected reflected signal from the non-ground network signal received by the non-ground network antenna until the non-ground network signal strength is higher than the strength threshold.

13. The method according to any one of claims 10-12, characterized in that, The reflected wave detection antenna comprises a plurality of; The filtering out of the reflected signal detected by the reflected wave detection antenna from the non-ground network signal received by the non-ground network antenna comprises: filtering out the reflected signal detected by each of the plurality of reflected wave detection antennas from the non-ground network signal received by the non-ground network antenna.

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