Antenna sidelobe control method

Abstract

The present invention provides an antenna sidelobe control method, which is applied to the field of wireless communication technology. The method is applied to a base station. The base station includes a radio frequency channel, a phased array antenna and at least one auxiliary antenna. The radio frequency channel is connected to the phased array antenna and the at least one auxiliary antenna respectively. The method includes: when the base station works in a transmitting mode, the radio frequency channel transmits a first radio frequency signal based on the phased array antenna, and transmits a second radio frequency signal based on at least one auxiliary antenna; the first radio frequency signal and the second radio frequency signal are coherent communication signals about the main lobe. When the base station works in a receiving mode, the radio frequency channel receives a third radio frequency signal carrying service information based on the phased array antenna; the radio frequency channel transmits a fourth radio frequency signal based on at least one auxiliary antenna, and the fourth radio frequency signal is used to offset the sidelobe level signal of the phased array antenna. The present invention suppresses the side lobes while increasing the signal gain of the main lobe, thereby improving communication performance and anti-interference capability.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technology, and in particular to an antenna sidelobe control method. Background Art

[0002] The base station can wirelessly communicate with the terminal device based on the antenna. Specifically, the base station transmits a radio frequency signal to the terminal device or receives a radio frequency signal from the terminal device through the antenna. With the improvement of wireless radio frequency technology, in order to improve the communication quality, an array antenna is usually used to transmit or receive radio frequency signals. The array antenna has a signal pattern. The main lobe direction of the signal pattern is the communication direction between the base station and the terminal device, and the side lobe (also called the side lobe) of the signal pattern is the coverage direction outside the main lobe. Generally, when transmitting a radio frequency signal, the greater the signal power leaked to the side lobe under the condition of a certain transmission signal power, the lower the antenna gain in the main lobe direction. In addition, when receiving a radio frequency signal, the greater the received power of the side lobe, the greater the interference signal entering from the side lobe side. Therefore, it is necessary to suppress the side lobe level of the antenna. In addition, it is also necessary to enhance the antenna gain of the main lobe to achieve good communication performance. Summary of the invention

[0003] The embodiment of the present invention provides an antenna sidelobe control method, which suppresses the antenna sidelobe and also additionally improves the signal gain of the main lobe, thereby improving communication performance and anti-interference capability.

[0004] To achieve the above object, the embodiments of the present invention adopt the following technical solutions:

[0005] In a first aspect, a method for controlling antenna side lobes is provided, which is applied to a base station. The base station includes a radio frequency channel, a phased array antenna, and at least one auxiliary antenna. The radio frequency channel is connected to the phased array antenna and the at least one auxiliary antenna, respectively. The method includes: when the base station operates in a transmitting mode, the radio frequency channel transmits a first radio frequency signal based on the phased array antenna, and transmits a second radio frequency signal based on at least one auxiliary antenna. The first radio frequency signal and the second radio frequency signal are coherent communication signals about the main lobe. When the base station operates in a receiving mode, the radio frequency channel receives a third radio frequency signal carrying service information based on the phased array antenna. The radio frequency channel transmits a fourth radio frequency signal based on at least one auxiliary antenna, and the fourth radio frequency signal is used to offset the side lobe level signal of the phased array antenna.

[0006] In a possible implementation manner, the third radio frequency signal is a radio frequency signal transmitted by the terminal device to the base station. The method further includes: determining the relative position of the terminal device according to the third radio frequency signal.

[0007] In a possible implementation, the base station further includes a power detector. The power detector is connected to the radio frequency channel. The method further includes: detecting the sidelobe interference signal power according to the power detector, and adjusting the phase weight and / or amplitude weight of the fourth radio frequency signal according to the sidelobe interference signal power, the relative orientation of the terminal device, and the channel state information of the phased array antenna.

[0008] In a possible implementation, the at least one auxiliary antenna includes a radiator and a switching circuit. The adjusting the phase weight of the fourth radio frequency signal includes: adjusting a phase shift amount when the at least one radiator transmits the fourth radio frequency signal according to the switching circuit.

[0009] In a possible implementation, the RF channel is connected to at least one radiator based on different transmission line paths in the distributed transmission line structure. The transmission line path is a length-adjustable structure. The above-mentioned adjusting the phase shift amount when the at least one radiator transmits the fourth RF signal according to the switching circuit includes: switching the length of the transmission line path corresponding to the connection of the at least one radiator according to the switching circuit to switch the phase shift amount when the fourth RF signal is switched.

[0010] In a possible implementation, the RF channel is connected to at least one radiator based on at least one phase shifter; adjusting the phase shift amount when the at least one radiator transmits a fourth RF signal according to the switching circuit includes: adjusting the phase shift amount when the at least one radiator transmits the fourth RF signal according to the switching circuit switching the phase shift value of at least one phase shifter.

[0011] In a possible implementation, the first RF signal and the second RF signal are RF signals transmitted to the terminal device. The method further includes: determining the phase of the first RF signal and the phase of the second RF signal according to the relative position of the terminal device and the signal strength of the third RF signal.

[0012] In a possible implementation, the transmitting of the first radio frequency signal based on the phased array antenna includes: adjusting a phase shift amount of the phased array antenna according to the determined phase of the first radio frequency signal, and transmitting the first radio frequency signal.

[0013] In a possible implementation, the above-mentioned transmitting the second radio frequency signal based on at least one auxiliary antenna includes: adjusting the phase shift amount of the phased array antenna according to the determined phase of the second radio frequency signal, and transmitting the second radio frequency signal, and the first radio frequency signal and the second radio frequency signal are coherently enhanced in free space.

[0014] In a possible implementation, the radio frequency channel includes a radio frequency transmission channel, the radio frequency transmission channel includes a first amplifier and a second amplifier, the first amplifier is connected to the phased array antenna, and the first amplifier is used to provide a first radio frequency signal to the phased array antenna. The second amplifier is connected to at least one auxiliary antenna, and the second amplifier is used to provide a second radio frequency signal and a third radio frequency signal to the at least one auxiliary antenna.

[0015] The embodiments of the present invention have the following beneficial effects:

[0016] When the phased array antenna transmits a first RF signal to the terminal device, a second RF signal is transmitted based on at least one auxiliary antenna. The first RF signal and the second RF signal are coherent communication signals, which can realize coherent enhancement of the first RF signal and the second RF signal under beamforming in free space, thereby improving the antenna gain of the main lobe. At the same time, the second RF signal can also cancel the side lobe to a certain extent. In the receiving working mode, a fourth RF signal is transmitted based on at least one auxiliary antenna, and the fourth RF signal cancels the interference signal at the side lobe of the phased array antenna based on the side lobe cancellation technology. Based on this, the auxiliary antenna can be multiplexed to realize the control of the side lobe and the enhancement of the main lobe antenna gain. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of a communication system provided by an embodiment of the present invention;

[0018] Figure 2 A schematic diagram of a base station structure provided in an embodiment of the present invention Figure 1 ;

[0019] Figure 3 A schematic diagram of a base station structure provided in an embodiment of the present invention Figure 2 ;

[0020] Figure 4 A schematic diagram of a base station structure provided in an embodiment of the present invention Figure 3 ;

[0021] Figure 5 A schematic diagram of a base station structure provided in an embodiment of the present invention Figure 4 ;

[0022] Figure 6 A schematic diagram of a base station structure provided in an embodiment of the present invention Figure 5 ;

[0023] Figure 7 A schematic diagram of a base station structure provided in an embodiment of the present invention Figure 6 ;

[0024] Figure 8 A schematic diagram of a base station structure provided in an embodiment of the present invention Figure 7 . DETAILED DESCRIPTION

[0025] It should be noted that the terms "first", "second", etc. involved in the embodiments of the present invention are only used to distinguish features of the same type and cannot be understood as indicating relative importance, quantity, order, etc.

[0026] The terms "exemplary" or "for example" and the like in the embodiments of the present invention are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific way.

[0027] The terms "coupling" and "connection" involved in the embodiments of the present invention should be understood in a broad sense. For example, they may refer to a physical direct connection, or an indirect connection achieved through electronic devices, such as a connection achieved through a resistor, inductor, capacitor or other electronic devices.

[0028] First, some basic concepts are explained:

[0029] Antenna pattern is also called radiation pattern. Antenna gain cannot be directly obtained from the pattern, but the directivity coefficient can be obtained from the pattern. Antenna gain = directivity coefficient * antenna efficiency. Antenna efficiency is generally not 100%, so the directivity coefficient is greater than the antenna gain. Antenna gain is mainly expressed through the test of the pattern. In order to facilitate the comparison of the pattern characteristics of various antennas, some characteristic parameters need to be specified. They mainly include: main lobe width, side lobe level, front-to-back ratio and directivity coefficient. Main lobe width: It is a physical quantity that measures the sharpness of the maximum radiation area of ​​the antenna. It is usually taken as the width between the two half-power points of the main lobe of the antenna pattern. Side lobe level: It refers to the level of the first side lobe closest to the main lobe and with the highest level, usually in decibels (dB). Front-to-back ratio: It refers to the ratio of the level in the maximum radiation direction (i.e. forward) to the level in the opposite direction (i.e. backward), usually in decibels. Directivity coefficient: At a certain distance from the antenna, the ratio of the radiated power flux density of the antenna in the direction of maximum radiation to the radiated power flux density of an ideal omnidirectional antenna with the same radiation power at the same distance.

[0030] Antenna gain: refers to the ratio of the power density of the signal generated by the actual antenna and the ideal radiating unit at the same point in space under the condition of equal input power. It quantitatively describes the degree to which an antenna radiates the input power in a concentrated manner. The gain is obviously closely related to the antenna pattern. The narrower the main lobe of the pattern and the smaller the side lobe, the higher the gain. Antenna gain is used to measure the ability of an antenna to send and receive signals in a specific direction. It is one of the most important parameters for selecting base station antennas. Generally speaking, the improvement of gain mainly relies on reducing the beam width of the vertical radiation while maintaining omnidirectional radiation performance in the horizontal plane. Antenna gain is extremely important to the operating quality of the communication system because it determines the signal level at the edge of the cell. Increasing the gain can increase the coverage of the network in a certain direction, or increase the gain margin within a certain range. Any cellular system is a two-way process. Increasing the gain of the antenna can simultaneously reduce the gain budget margin of the two-way system. Under the same conditions, the higher the gain, the farther the radio wave propagates.

[0031] Beam: refers to the shape of the electromagnetic waves emitted by the antenna on the surface of the earth. It can also be understood as the main lobe of the antenna array radiation pattern.

[0032] Beam width: refers to the angular width on both sides of the maximum radiation direction when the power density relative to the maximum radiation direction drops to half, also called 3dB beam width. The half-power beam width in the horizontal plane is called the horizontal beam width; the half-power beam width in the vertical plane is called the vertical beam width.

[0033] Beamforming refers to the process of transmitting the same RF signal based on two or more sub-antennas at the same time, configuring a phase shifting structure for some or all of the two or more sub-antennas, and performing phase shifting processing on the RF signals transmitted by the corresponding sub-antennas based on the phase shifting structure, so that the phases of the RF signals transmitted by some or all of the multiple sub-antennas are different. RF signals with different phases will form a directional beam with stronger gain based on the principle of wave interference in the air, and wireless communication will be carried out based on the formed beam. RF signals are electromagnetic wave signals. When two RF signals meet in space, if the peaks of the two electromagnetic waves meet, an electromagnetic wave signal with enhanced peaks will be obtained. Similarly, the meeting of troughs will also achieve trough enhancement, showing coherent constructive characteristics. Conversely, if the peaks and troughs of two RF signals meet, they will cancel each other out, showing coherent destructive characteristics. Taking the example of two sub-antennas transmitting RF signals respectively, where the dotted waveform represents the trough of the RF signal and the solid waveform represents the peak of the RF signal, it can be seen that the RF signals transmitted by the two sub-antennas will show a beamforming effect in the transmission direction, thereby forming a directional antenna. However, in the application scenario of phased array antennas, as the number of sub-antennas increases, the transmitted RF signal beam is more concentrated, which will sacrifice a certain coverage range of the phased array antenna. In order to achieve signal coverage in the entire airspace, it is necessary to change the phase shift value of the phase shift structure of the phased array antenna so that the beam transmission direction (i.e., the radiation pattern) of the phased array antenna changes, and the entire airspace is covered by switching the beam. Embodiment 1:

[0034] The embodiment of the present invention provides a communication system, such as Figure 1 As shown, the communication system 1000 includes a terminal device 100 and a base station 200, and the base station 200 and the terminal device 100 perform wireless communication based on radio frequency signals. The base station 200 can perform wireless communication with the terminal device 100 based on an antenna. Specifically, the base station 200 transmits radio frequency signals to the terminal device 100 or receives radio frequency signals from the terminal device 100 through an antenna. With the improvement of wireless radio frequency technology, in order to improve the communication quality, an array antenna is usually used to transmit or receive radio frequency signals. The array antenna has a signal pattern, and the main lobe direction of the signal pattern is the communication direction between the base station 200 and the terminal device 100, and the side lobe (also called the side lobe) of the signal pattern is the coverage direction outside the main lobe. Generally, when transmitting a radio frequency signal, when the transmission signal power is constant, the greater the signal power leaked to the side lobe, the lower the antenna gain in the main lobe direction. In addition, when receiving a radio frequency signal, the greater the receiving power of the side lobe, the greater the interference signal entering from the side lobe side. Therefore, it is necessary to suppress the sidelobe level of the antenna. In addition, it is also necessary to enhance the antenna gain of the main lobe to achieve good communication performance.

[0035] This embodiment provides a base station, such as Figure 2 As shown, the base station 200 includes a radio frequency channel 210 and a phased array antenna 220. The radio frequency channel 210 is connected to the phased array antenna 220.

[0036] For example, Figure 2 As shown, the base station 200 also includes a baseband processing circuit 250 and an intermediate frequency processing circuit 260. In conventional wireless radio frequency communication technology, when the base station 200 needs to transmit a radio frequency signal, the baseband processing circuit 250 modulates the baseband signal to obtain an intermediate frequency signal, and transmits the intermediate frequency signal to the intermediate frequency processing circuit 260. After the intermediate frequency processing circuit 260 up-converts and mixes the intermediate frequency signal into a radio frequency signal, the radio frequency signal is processed (bandpass filtering and power amplification, etc.) through the radio frequency channel 210, and then the beam is transmitted based on the beamforming principle through the phased array antenna 220. Similarly, when the base station 200 receives the radio frequency signal transmitted by the terminal device 100 based on the phased array antenna 220, the radio frequency signal is processed (including filtering and low-noise signal amplification, etc.) based on the radio frequency channel 210, and then the intermediate frequency processing circuit 260 down-converts and mixes the received radio frequency signal to obtain an intermediate frequency signal. The baseband processing circuit 250 performs demodulation and other processing on the received intermediate frequency signal to obtain the carried service information.

[0037] For example, Figure 3 As shown, the RF channel 210 is based on full-duplex communication. In the full-duplex communication mode, the receiving and transmitting RF signals are multiplexed on the same phased array antenna 220, and the RF signals are received and transmitted in different time slots. At this time, the RF channel 210 includes an RF transmitting channel 211 and an RF receiving channel 212. After the RF signal after up-conversion and mixing is processed based on the RF transmitting channel 211, it is transmitted through the phased array antenna 220. After the RF signal received by the phased array antenna 220 is processed based on the RF receiving channel 212, the processed signal is transmitted to the intermediate frequency processing circuit 260 for down-conversion and mixing processing. At this time, the RF transmitting channel 211 and the RF receiving channel 212 can be connected to the phased array antenna 220 based on a duplexer.

[0038] With the improvement of wireless radio frequency technology, in order to improve the communication quality, a phased array antenna 220 is usually used to transmit or receive radio frequency signals. The phased array antenna 220 has a signal pattern, and the main lobe direction of the signal pattern is the communication direction between the base station 200 and the terminal device 100, and the side lobe (also called the side lobe) of the signal pattern is the coverage direction outside the main lobe. Usually, when transmitting a radio frequency signal, when the transmission signal power is constant, the greater the signal power leaked to the side lobe, the lower the antenna gain in the main lobe direction. In addition, when receiving a radio frequency signal, the greater the received power of the side lobe, the greater the interference signal entering from the side lobe side. Therefore, it is necessary to suppress the side lobe level of the antenna, and in addition, it is also necessary to enhance the antenna gain of the main lobe to achieve good communication performance.

[0039] In order to achieve the above purpose, Figure 4 As shown, the base station 200 also includes at least one auxiliary antenna 230. The RF channel 210 is also connected to at least one auxiliary antenna 230. Each auxiliary antenna 230 includes a corresponding radiator 231. When the base station 200 works in the transmission mode, the RF channel 210 transmits a first RF signal based on the phased array antenna 220, and transmits a second RF signal based on at least one auxiliary antenna 230; the first RF signal and the second RF signal are coherent communication signals about the main lobe. When the base station 200 works in the reception mode, the RF channel 210 receives a third RF signal carrying service information based on the phased array antenna. The RF channel 210 transmits a fourth RF signal based on at least one auxiliary antenna 230, and the fourth RF signal is used to cancel the side lobe level signal of the phased array antenna 220. In the embodiment of the present invention, when the phased array antenna 220 transmits the first RF signal to the terminal device 100, the second RF signal is transmitted based on at least one auxiliary antenna 230. The first RF signal and the second RF signal are coherent communication signals. In coherent communication, the first RF signal and the second RF signal can be phase matched based on the baseband processing circuit 250 to achieve coherent enhancement of the first RF signal and the second RF signal under beamforming in free space, thereby improving the antenna gain of the main lobe. At the same time, the second RF signal can also cancel the side lobe to a certain extent. In the receiving working mode, a fourth RF signal is transmitted based on at least one auxiliary antenna 230, and the fourth RF signal cancels the interference signal at the side lobe of the phased array antenna 220 based on the side lobe cancellation technology. Based on this, the auxiliary antenna 230 can be reused to achieve side lobe control and main lobe antenna gain enhancement.

[0040] In some possible implementations, such as Figure 5As shown, the base station 200 further includes a power detector 240. The power detector 240 is connected to the radio frequency channel 210. The power detector 240 is used to detect the main lobe power and the side lobe power of the phased array antenna 220.

[0041] In one example, if Figure 6 As shown, at least one auxiliary antenna 230 includes at least one radiator 231 and a switching circuit 232. The switching circuit 232 is used to adjust the phase shift amount when at least one radiator 231 transmits a fourth radio frequency signal. Exemplarily, the radio frequency channel 210 is connected to at least one radiator 231 based on different transmission line paths in the distributed transmission line structure. The phase shift amount when the fourth radio frequency signal is switched is switched by switching the length of the transmission line path corresponding to the connection of at least one radiator 231 according to the switching circuit 232. In wireless radio frequency communication, the transmission of radio frequency signals is realized based on transmission lines and the like in electronic devices. The different lengths of the transmission lines cause the radio frequency signals to have different phase shift amounts during transmission. By setting the transmission line path to a switchable length structure, the phase of the radio frequency signal received by each radiator 231 can be shifted. Thereby, each radiator 231 transmits radio frequency signals of different phases. By different requirements for transmitting and receiving signals, the phase is adjusted to transmit the second radio frequency signal or the fourth radio frequency signal of the corresponding phase.

[0042] In one example, if Figure 7 As shown, the RF channel 210 is respectively connected to at least one radiator 231 based on at least one phase shifter PSPS. The phase shift amount when at least one radiator 231 transmits the fourth RF signal is adjusted according to the switching circuit 232, including: adjusting the phase shift amount when at least one radiator 231 transmits the fourth RF signal according to the switching circuit 232 switching the phase shift value of at least one phase shifter PS. In the embodiment of the present invention, the phase adjustment of the RF signal transmitted by at least one radiator 231 can also be implemented based on the phase shifter PS. By adjusting the phase to transmit the second RF signal or the fourth RF signal of the corresponding phase due to different requirements for transmitting and receiving signals.

[0043] In some possible implementations, such as Figure 8As shown, the RF transmission channel 211 includes a first amplifier PA1 and a second amplifier PA2, the first amplifier PA1 is connected to the phased array antenna 220, and the first amplifier PA1 is used to provide a first RF signal to the phased array antenna 220; the second amplifier PA2 is connected to at least one auxiliary antenna 230, and the second amplifier PA2 is used to provide a second RF signal and a third RF signal to at least one auxiliary antenna 230. In the embodiment of the present invention, the phased array antenna 220 and the auxiliary antenna 230 should not be regarded as a complete array antenna. In a traditional array antenna, each array sub-antenna needs to transmit a RF signal at the same time, and the transmitted RF signal comes from the same RF signal of the same power amplifier. In the embodiment of the present invention, the auxiliary antenna 230 does not affect the normal operation of the phased array antenna 220 when it is not working. And the phased array antenna 220 and the auxiliary antenna 230 do not transmit the same RF signal. And when the phased array antenna 220 is in the receiving state, the auxiliary antenna 230 may also exist in the transmitting state.

[0044] In some possible implementations, the base station 200 further includes at least one detection antenna. The detection antenna is used to receive radio frequency signals in free space. Interference detection of the side lobe level is implemented based on the radio frequency signal received by the detection antenna. Based on the interference detection result, the radio frequency signal received by the phased array antenna 220 is weighted and adjusted, so as to cancel the side lobe level of the received radio frequency signal at the software level. Embodiment 2:

[0045] Based on the structure described in the first embodiment, an antenna sidelobe control method can be executed, the method comprising: when the base station 200 works in the transmitting mode, the RF channel 210 transmits a first RF signal based on the phased array antenna 220, and transmits a second RF signal based on at least one auxiliary antenna 230; the first RF signal and the second RF signal are coherent communication signals about the main lobe. When the base station 200 works in the receiving mode, the RF channel 210 receives a third RF signal carrying service information based on the phased array antenna; the RF channel 210 transmits a fourth RF signal based on at least one auxiliary antenna 230, and the fourth RF signal is used to cancel the sidelobe level signal of the phased array antenna 220. In the embodiment of the present invention, when the phased array antenna 220 transmits the first RF signal to the terminal device 100, the second RF signal is transmitted based on at least one auxiliary antenna 230. The first RF signal and the second RF signal are coherent communication signals. In the coherent communication, the first RF signal and the second RF signal can be phase matched based on the baseband processing circuit 250 to achieve coherent enhancement of the first RF signal and the second RF signal under beamforming in free space, thereby improving the antenna gain of the main lobe. At the same time, the second RF signal can also cancel the side lobe to a certain extent. In the receiving working mode, a fourth RF signal is transmitted based on at least one auxiliary antenna 230, and the fourth RF signal cancels the RF signal at the side lobe of the phased array antenna 220 based on the side lobe cancellation technology. Based on this, the multiplexing auxiliary antenna 230 can be used to realize the enhancement of the side lobe control and the main lobe antenna gain.

[0046] Exemplarily, the third radio frequency signal is a radio frequency signal transmitted by the terminal device 100 to the base station 200. The method further includes: determining the relative position of the terminal device 100 according to the third radio frequency signal. In wireless communication, the base station 200 will also collect relevant information of the terminal device 100, such as channel state information, reference pilot power, and phase position, during the process of wireless communication with the terminal device 100. According to the relative position of the terminal device 100, the target radiation pattern of the communication can be determined. The phase of the received and transmitted radio frequency signal is determined according to the main lobe of the determined target radiation pattern.

[0047] Exemplarily, the method also includes: detecting the sidelobe interference signal power according to the power detector 240, and adjusting the phase weight and / or amplitude weight of the fourth RF signal according to the sidelobe interference signal power, the relative orientation of the terminal device and the channel state information of the phased array antenna 220. In wireless communications, there are straight-line transmission (line-of-sight, LOS) paths and non-line-of-sight (non-line-of-sight, NLOS) paths for RF signals. Under the straight-line transmission path, the relative orientation can be used to accurately determine the phase parameter value. However, most of the loss paths during RF transmission are non-linear propagation paths. Therefore, the RF signal is phase-matched based on the sidelobe interference signal power, channel state information and relative orientation to meet the phase adjustment calculation of the first RF signal, the second RF signal and the fourth RF signal.

[0048] In some possible implementations, the method further includes: detecting the sidelobe interference signal power according to the power detector 240, and adjusting the phase weight and / or amplitude weight of the fourth RF signal according to the sidelobe interference signal power, the relative orientation of the terminal device, and the channel state information of the phased array antenna 220. In the embodiment of the present invention, according to the different requirements of the second RF signal and the fourth RF signal, it is necessary to adjust the corresponding phase weight and / or amplitude weight to achieve sidelobe cancellation or main lobe enhancement.

[0049] In some examples, adjusting the phase weight of the fourth radio frequency signal includes: adjusting a phase shift amount when at least one radiator 231 transmits the fourth radio frequency signal according to the switching circuit 232 .

[0050] In some examples, adjusting the phase shift amount when at least one radiator 231 transmits the fourth RF signal according to the switching circuit 232 includes: switching the length of the transmission line path corresponding to the connection of at least one radiator 231 according to the switching circuit 232 to switch the phase shift amount when the fourth RF signal is transmitted.

[0051] In some examples, adjusting the phase shift amount when at least one radiator 231 transmits the fourth RF signal according to the switching circuit 232 includes: adjusting the phase shift amount when at least one radiator 231 transmits the fourth RF signal by switching the phase shift value of at least one phase shifter PS according to the switching circuit 232.

[0052] In some possible implementations, the first RF signal and the second RF signal are RF signals transmitted to the terminal device. The above method further includes: determining the phase of the first RF signal and the phase of the second RF signal according to the relative position of the terminal device and the signal strength of the third RF signal.

[0053] Exemplarily, the transmitting of the first radio frequency signal based on the phased array antenna 220 includes: adjusting the phase shift amount of the phased array antenna 220 according to the determined phase of the first radio frequency signal, and transmitting the first radio frequency signal.

[0054] Exemplarily, the above-mentioned transmitting the second RF signal based on at least one auxiliary antenna 230 includes: adjusting the phase shift amount of the phased array antenna 220 according to the determined phase of the second RF signal, and transmitting the second RF signal, and the first RF signal and the second RF signal are coherently enhanced in free space.

[0055] It should be understood that in various embodiments of the present invention, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0056] Those skilled in the art will appreciate that the modules and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0057] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and modules described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0058] In the several embodiments provided by the present invention, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the modules is only a logical function division. There may be other division methods in actual implementation, such as multiple modules or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

[0059] The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, they may be located in one device or distributed on multiple devices. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment.

[0060] In addition, each functional module in each embodiment of the present invention may be integrated into one device, or each module may exist physically separately, or two or more modules may be integrated into one device.

[0061] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using a software program, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present invention is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more media integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)).

[0062] In an embodiment of the present invention, the terminal may be a UE, an access terminal, a terminal unit, a terminal station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a wireless communication device, a terminal agent or a terminal device in a 6G network or a future evolved public land mobile network (PLMN). The access terminal may be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device or a wearable device, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. Optionally, the electronic device and the transmitting device may be mobile or fixed.

[0063] In a possible implementation, the base station in the embodiment of the present invention may be a network device that communicates with a terminal device. The network device may include a transmission and reception point (TRP), a base station, a remote radio unit (RRU) or a baseband unit (BBU) (also referred to as a digital unit (DU)) of a separate base station, a satellite, a drone, a broadband network gateway (BNG), an aggregation switch, a non-3GPP access device, a relay station or an access point, etc.

[0064] In addition, the base station can be a base transceiver station (BTS) in a global system for mobile communication (GSM) or code division multiple access (CDMA) network, an NB (Node B) in wideband code division multiple access (WCDMA), an eNB or eNodeB (evolutional NodeB) in LTE, a wireless controller in a cloud radio access network (CRAN) scenario, or a base station in a 5G communication system (such as a next-generation Node B (gNodeB, gNB)), or a base station in a future evolution network, etc., without specific limitation here.

[0065] In addition, the communication architecture and business scenarios described in the embodiments of the present invention are intended to more clearly illustrate the technical solutions of the embodiments of the present invention, and do not constitute a limitation on the technical solutions provided by the embodiments of the present invention. Ordinary technicians in this field can know that with the evolution of the communication architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present invention are also applicable to similar technical problems.

[0066] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for controlling antenna side lobes, characterized in that: Applied to a base station, the base station comprises a radio frequency channel, a phased array antenna, a power detector and at least one auxiliary antenna; The radio frequency channels are respectively connected to the phased array antenna and the at least one auxiliary antenna; The power detector is connected to the radio frequency channel; the method comprises: When the base station operates in a transmission mode, the radio frequency channel transmits a first radio frequency signal based on the phased array antenna, and transmits a second radio frequency signal based on the at least one auxiliary antenna; the first radio frequency signal and the second radio frequency signal are coherent communication signals about a main lobe; When the base station operates in a receiving mode, the RF channel receives a third RF signal carrying service information based on the phased array antenna, and the third RF signal is a RF signal transmitted by a terminal device to the base station; the RF channel transmits a fourth RF signal based on the at least one auxiliary antenna; the relative position of the terminal device is determined according to the third RF signal; the sidelobe interference signal power is detected according to the power detector, and the phase weight and / or amplitude weight of the fourth RF signal is adjusted according to the sidelobe interference signal power, the relative position of the terminal device and the channel state information of the phased array antenna; the fourth RF signal is used to offset the sidelobe level signal of the phased array antenna.

2. The antenna sidelobe control method according to claim 1, characterized in that: The at least one auxiliary antenna includes a radiator and a switching circuit; and the adjusting the phase weight of the fourth radio frequency signal includes: The phase shift amount when the at least one radiator transmits the fourth radio frequency signal is adjusted according to the switching circuit.

3. The antenna sidelobe control method according to claim 2, characterized in that: The radio frequency channel is connected to the at least one radiator based on different transmission line paths in the distributed transmission line structure; The transmission line path is a length-adjustable structure, and adjusting the phase shift amount when the at least one radiator transmits the fourth radio frequency signal according to the switching circuit includes: The phase shift amount of the fourth radio frequency signal is switched according to the switching circuit switching the length of the transmission line path corresponding to the at least one radiator.

4. The antenna sidelobe control method according to claim 2, characterized in that: The radio frequency channels are respectively connected to the at least one radiator based on at least one phase shifter; The adjusting the phase shift amount when the at least one radiator transmits the fourth radio frequency signal according to the switching circuit comprises: The phase shift amount when the at least one radiator transmits the fourth radio frequency signal is adjusted according to the phase shift value of the at least one phase shifter switched by the switching circuit.

5. The antenna sidelobe control method according to claim 1, characterized in that: The first radio frequency signal and the second radio frequency signal are radio frequency signals transmitted to the terminal device; the method further includes: The phase of the first radio frequency signal and the phase of the second radio frequency signal are determined according to the relative position of the terminal device and the signal strength of the third radio frequency signal.

6. The antenna sidelobe control method according to claim 5, characterized in that: The transmitting a first radio frequency signal based on the phased array antenna includes: According to the determined phase of the first radio frequency signal, the phase shift amount of the phased array antenna is adjusted, and the first radio frequency signal is transmitted.

7. The antenna sidelobe control method according to claim 5, characterized in that: The transmitting a second radio frequency signal based on the at least one auxiliary antenna comprises: According to the determined phase of the second radio frequency signal, the phase shift amount of the phased array antenna is adjusted, and the second radio frequency signal is transmitted, and the first radio frequency signal and the second radio frequency signal are coherently enhanced in free space.

8. The antenna sidelobe control method according to any one of claims 1 to 7, characterized in that: The RF channel includes an RF transmission channel, and the RF transmission channel includes a first amplifier and a second amplifier, the first amplifier is connected to the phased array antenna, and the first amplifier is used to provide the first RF signal to the phased array antenna; the second amplifier is connected to the at least one auxiliary antenna, and the second amplifier is used to provide the second RF signal and the third RF signal to the at least one auxiliary antenna.

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