Passive intermodulation signal detection method and device

Abstract

The embodiment of the present application discloses a method and device for detecting a passive intermodulation signal, which is used to detect the passive intermodulation signal quickly and at low cost. The method includes: transmitting a first signal through a first antenna group in an antenna array; obtaining a first receiving power when the first antenna group receives a second signal, and a second receiving power when the second antenna group receives a third signal, wherein the second antenna group is an antenna group other than the first antenna group on the antenna array; and determining, based on the first receiving power and the second receiving power, that the second signal includes a first passive intermodulation signal corresponding to the first antenna group, and the first passive intermodulation signal is excited by the first signal.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of wireless communication technology, and in particular to a method and device for detecting a passive intermodulation signal. Background Art

[0002] Nonlinear interference sources are an important factor limiting the capacity of communication systems. Typical nonlinear interferences include passive intermodulation (PIM) interference. Passive intermodulation in wireless communication systems refers to the intermodulation effect caused by poor contact, oxidation, or rust in passive components such as connectors, feeders, antennas, and filters when operating under high-power signal conditions at multiple frequencies. Passive intermodulation will produce passive intermodulation signals (PIM3, PIM5, etc.), and passive components that produce passive intermodulation sources are called passive intermodulation sources. With the increase in the number of antennas and frequencies, the problem of passive intermodulation interference is becoming more and more serious. How to quickly and effectively determine the location of passive intermodulation sources is crucial.

[0003] In order to locate the passive intermodulation source, an external device can be used to scan the device that may have a PIM source through sound waves or ultrasound. When the sound wave encounters the PIM source, the amplitude of the PIM signal changes periodically with the frequency of the sound wave. Therefore, by analyzing whether the amplitude of the PIM signal is modulated by the sound wave, it can be determined whether the sound wave has scanned the PIM source and the possible location of the PIM source can be given.

[0004] However, acoustic wave positioning of passive intermodulation sources requires the use of external equipment, which is costly. In addition, for a specific PIM source, only sound waves of a specific frequency can modulate the amplitude of the PIM signal. Therefore, the sound wave frequency needs to be tested, or the sound wave frequency needs to be traversed within a certain range, which is inefficient. Summary of the invention

[0005] The embodiments of the present application provide a method and device for detecting a passive intermodulation signal, which are used to improve the detection speed of the passive intermodulation signal, thereby improving the positioning speed of the passive intermodulation source.

[0006] The first aspect of the present application provides a method for detecting a passive intermodulation signal, which can be performed by a detection device for a passive intermodulation signal, and the detection device for a passive intermodulation signal is specifically a multi-antenna network device. The method can also be performed by a processor, a chip, or a chip system, and can also be implemented by a logic module or software that can realize all or part of the communication function, control function and computing function. Exemplarily, the method is performed by a detection device for a multi-antenna passive intermodulation signal, and the method includes:

[0007] A first signal is transmitted through a first antenna group in an antenna array, wherein the antenna array includes at least two antenna groups, and the first antenna group is one of the at least two antenna groups; a first received power and a second received power are obtained, wherein the first received power is the received power of a second signal received by the first antenna group, and the second received power is the received power of a third signal received by the second antenna group, wherein the second antenna group is an antenna group other than the first antenna group among the at least two antenna groups, and the receiving time periods corresponding to the second signal and the third signal are the same; and according to the first received power and the second received power, it is determined that the second signal includes a first passive intermodulation signal corresponding to the first antenna group, and the first passive intermodulation signal is excited by the first signal.

[0008] The first signal includes at least two carriers of different frequencies for exciting a passive intermodulation signal. Each antenna group includes at least one receiving antenna and at least one transmitting antenna. When the antenna group includes one receiving antenna, the first received power is the received power corresponding to the receiving antenna in the first antenna group, and the second received power is the received power corresponding to the receiving antenna in the second antenna group. When the antenna group includes at least two receiving antennas, the first received power and the second received power can be calculated in any of the following three ways:

[0009] Mode 1: The first received power is an average value of received powers corresponding to at least two first receiving antennas, and the second received power is an average value of received powers corresponding to at least two second receiving antennas.

[0010] Mode 2: The first receiving power is the sum of the receiving powers corresponding to at least two first receiving antennas, and the second receiving power is the sum of the receiving powers corresponding to at least two second receiving antennas. Mode 2 is applicable to the case where the number of first receiving antennas is equal to the number of second receiving antennas.

[0011] Mode three: the first receiving power is the maximum value of the receiving powers corresponding to at least two first receiving antennas, and the second receiving power is the maximum value of the receiving powers corresponding to at least two second receiving antennas.

[0012] It can be seen that the antenna array is divided into multiple antenna groups, and one of the antenna groups is determined to be the first antenna group, and the first antenna group is activated to transmit the first signal, thereby activating the passive intermodulation source that may exist in the first antenna group to generate a passive intermodulation signal. The first receiving power of the first antenna group receiving the second signal and the second receiving power of the second antenna group receiving the third signal are obtained. Through the first receiving power and the second receiving power, it can be known whether the second signal received by the first antenna group includes a passive intermodulation signal, so as to determine whether there is a passive intermodulation source in the first antenna group. The embodiment of the present application does not require the aid of external equipment for detection. By activating the antenna group once, it can be detected whether the activated first antenna group has generated a passive intermodulation signal, which can improve the positioning speed of the passive intermodulation source.

[0013] In a possible implementation, determining that the second signal includes a first passive intermodulation signal corresponding to the first antenna group based on the first received power and the second received power includes: when the first received power is greater than the second received power, determining that the second signal includes the first passive intermodulation signal.

[0014] It can be seen that the first received power is greater than the second received power, which means that the signal strength of the second signal received by the first antenna group is greater than the signal strength of the third signal received by the second antenna group, which means that the passive intermodulation source in the first antenna group is excited to generate a passive intermodulation signal, resulting in the signal strength of the second signal being greater than the signal strength of the third signal.

[0015] In one possible implementation, determining, based on the first received power and the second received power, that the second signal includes a first passive intermodulation signal corresponding to the first antenna group includes: obtaining a first target power and a second target power, the first target power being the power corresponding to the first antenna group set, the second target power being the power corresponding to the second antenna group set, the first antenna group set including antenna groups other than the first antenna group in the antenna array, and the second antenna group set including antenna groups other than the second antenna group in the antenna array; determining, based on the first received power, the first target power, the second received power, and the second target power, that the second signal includes the first passive intermodulation signal.

[0016] In one possible implementation, determining that the second signal includes a first passive intermodulation signal based on the first received power, the first target power, the second received power, and the second target power includes: obtaining a first target value based on the first received power and the first target power; obtaining a second target value based on the second received power and the second target power; when the first target value is greater than the second target value, determining that the second signal includes the first passive intermodulation signal.

[0017] In a possible implementation, the first antenna group set includes antenna groups adjacent to the first antenna group on the antenna array, and the second antenna group set includes antenna groups adjacent to the second antenna group on the antenna array. When there are multiple second antenna groups, each second antenna group has a corresponding second antenna group set, and the second antenna group set includes other second antenna groups except the second antenna group, or the second antenna group set also includes the first antenna group.

[0018] In a possible implementation manner, the first antenna group set includes all antenna groups on the antenna array except the first antenna group, and the second antenna group set includes all antenna groups on the antenna array except the second antenna group.

[0019] The first target value may be a ratio between the first received power and the first target power. The first received power is the dividend and the first target power is the divisor; the second target value is a ratio between the second received power and the second target power, wherein the second received power is the dividend and the second target power is the divisor. In some other embodiments, the first target value may also be a difference between the first received power and the first target power, wherein the first received power is the minuend and the first target power is the subtrahend; the second target value is a difference between the second received power and the second target power, wherein the second received power is the minuend and the second target power is the subtrahend.

[0020] It can be seen that the first target value is greater than the second target value, indicating that the first received power is significantly greater than the received power of the adjacent antenna group, and the signal strength of the second signal is higher than the signal strength of the third signal received by the adjacent antenna group. Therefore, it can be determined that the second signal includes the first passive intermodulation signal, and further it can be determined that there is a passive intermodulation source in the area where the first antenna group is located.

[0021] In a possible implementation, after determining that the second signal includes a first passive intermodulation signal corresponding to the first antenna group, the method also includes: transmitting a fourth signal through the first sub-antenna group, the first sub-antenna group being one of at least two sub-antenna groups; obtaining a third received power and a fourth received power, the third received power being the received power of a fifth signal received by the first sub-antenna group, the fourth received power being the received power of a sixth signal received by the second sub-antenna group, the second sub-antenna group being a sub-antenna group other than the first sub-antenna group among at least two sub-antenna groups, and the receiving time periods corresponding to the fifth signal and the sixth signal are the same; determining, based on the third received power and the fourth received power, that the fifth signal includes a second passive intermodulation signal corresponding to the first sub-antenna group, and the second passive intermodulation signal is excited by the fourth signal.

[0022] It can be seen that when the first antenna group includes multiple antennas, after determining that the first antenna group includes a passive intermodulation source, the sub-antenna group in the first antenna group is further detected, so as to more accurately locate the passive intermodulation source, thereby ensuring the positioning accuracy of the passive intermodulation source. In addition, when there is no passive intermodulation source in the first antenna group, it is not necessary to detect each sub-antenna group in the first antenna group, which can improve the positioning speed of the passive intermodulation source.

[0023] In a possible implementation, determining, based on the third received power and the fourth received power, that the fifth signal includes a second passive intermodulation signal corresponding to the first sub-antenna group includes: when the third received power is greater than the fourth received power, determining that the fifth signal includes the second passive intermodulation signal.

[0024] In one possible implementation, determining, based on the third received power and the fourth received power, that the fifth signal includes a second passive intermodulation signal corresponding to the first sub-antenna group includes: obtaining a third target power and a fourth target power, the third target power being the power corresponding to the first sub-antenna group set, the fourth target power being the power corresponding to the second sub-antenna group set, the first sub-antenna group set including sub-antenna groups other than the first sub-antenna group in the first antenna group, and the second sub-antenna group set including sub-antenna groups other than the second sub-antenna group in the first antenna group; determining, based on the third received power, the third target power, the fourth received power, and the fourth target power, that the fifth signal includes the second passive intermodulation signal.

[0025] In one possible implementation, determining that the fifth signal includes the second passive intermodulation signal based on the third received power, the third target power, the fourth received power and the fourth target power includes: obtaining a third target value based on the third received power and the third target power; obtaining a fourth target value based on the fourth received power and the fourth target power; when the third target value is greater than the fourth target value, determining that the fifth signal includes the second passive intermodulation signal.

[0026] In a possible implementation manner, the first sub-antenna group set includes sub-antenna groups adjacent to the first sub-antenna group in the first antenna group, and the second sub-antenna group set includes sub-antenna groups adjacent to the second sub-antenna group in the first antenna group.

[0027] According to a second aspect of the present application, there is provided a device for detecting a passive intermodulation signal, the device comprising: a control module, used to control a first antenna group in an antenna array to transmit a first signal, the antenna array comprising at least two antenna groups, the first antenna group being one of the at least two antenna groups; an acquisition module, used to acquire a first received power and a second received power, the first received power being the received power of a second signal received by the first antenna group, the second received power being the received power of a third signal received by the second antenna group, the second antenna group being an antenna group other than the first antenna group among the at least two antenna groups, the second signal and the third signal having the same receiving time period; a determination module, used to determine, based on the first received power and the second received power, that the second signal comprises a first passive intermodulation signal corresponding to the first antenna group, the first passive intermodulation signal being excited by the first signal.

[0028] In a possible implementation manner, the determination module is specifically configured to determine that the second signal includes the first passive intermodulation signal when the first received power is greater than the second received power.

[0029] In a possible implementation, the acquisition module is also used to obtain a first target power and a second target power, the first target power is the power corresponding to the first antenna group set, the second target power is the power corresponding to the second antenna group set, the first antenna group set includes antenna groups in the antenna array except the first antenna group, and the second antenna group set includes antenna groups in the antenna array except the second antenna group; the determination module is specifically used to determine that the second signal includes a first passive intermodulation signal based on the first received power, the first target power, the second received power and the second target power.

[0030] In one possible implementation, the acquisition module is also used to acquire a first target value based on the first received power and the first target power; the acquisition module is also used to acquire a second target value based on the second received power and the second target power; the determination module is specifically used to determine that the second signal includes a first passive intermodulation signal when the first target value is greater than the second target value.

[0031] In a possible implementation manner, the first antenna group set includes antenna groups adjacent to the first antenna group on the antenna array, and the second antenna group set includes antenna groups adjacent to the second antenna group on the antenna array.

[0032] In a possible implementation, the first antenna group includes at least two sub-antenna groups: the control module is also used to control the first sub-antenna group to transmit a fourth signal, and the first sub-antenna group is one of the at least two sub-antenna groups; the acquisition module is also used to acquire a third received power and a fourth received power, the third received power is the received power of a fifth signal received by the first sub-antenna group, the fourth received power is the received power of a sixth signal received by the second sub-antenna group, the second sub-antenna group is a sub-antenna group other than the first sub-antenna group among the at least two sub-antenna groups, and the receiving time periods corresponding to the fifth signal and the sixth signal are the same; the determination module is also used to determine, based on the third received power and the fourth received power, that the fifth signal includes a second passive intermodulation signal corresponding to the first sub-antenna group, and the second passive intermodulation signal is excited by the fourth signal.

[0033] In a possible implementation manner, the determination module is specifically configured to determine that the fifth signal includes the second passive intermodulation signal when the third received power is greater than the fourth received power.

[0034] In a possible implementation, the acquisition module is also used to obtain a third target power and a fourth target power, the third target power is the power corresponding to the first sub-antenna group set, the fourth target power is the power corresponding to the second sub-antenna group set, the first sub-antenna group set includes sub-antenna groups other than the first sub-antenna group in the first antenna group, and the second sub-antenna group set includes sub-antenna groups other than the second sub-antenna group in the first antenna group; the determination module is specifically used to determine that the fifth signal includes a second passive intermodulation signal based on the third received power, the third target power, the fourth received power and the fourth target power.

[0035] In one possible implementation, the acquisition module is also used to acquire a third target value based on a third received power and a third target power; the acquisition module is also used to acquire a fourth target value based on a fourth received power and a fourth target power; the determination module is also used to determine that the fifth signal includes a second passive intermodulation signal when the third target value is greater than the fourth target value.

[0036] In a possible implementation manner, the first sub-antenna group set includes sub-antenna groups adjacent to the first sub-antenna group in the first antenna group, and the second sub-antenna group set includes sub-antenna groups adjacent to the second sub-antenna group in the first antenna group.

[0037] The third aspect of the present application also provides a passive intermodulation signal detection device, which includes: a processor, the processor is coupled to a memory, the memory is used to store programs or instructions, and when the program or instructions are executed by the processor, the passive intermodulation signal detection device executes the method of the above-mentioned first aspect or any possible implementation method of the first aspect.

[0038] The fourth aspect of the present application also provides a computer-readable storage medium having instructions stored thereon. When the instructions are executed on a computer, the computer executes a method as described in the first aspect or any possible implementation of the first aspect.

[0039] The fifth aspect of the present application also provides a chip system, which includes at least one processor and an interface, the interface is used to receive data and / or signals, and the at least one processor is configured to execute a method as described in the first aspect or any possible implementation of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A schematic diagram of the structure of a communication system provided for this application;

[0041] Figure 2A A schematic diagram of the structure of a network device used in an embodiment of the present application;

[0042] Figure 2B A schematic diagram of the structure of another implementation of a network device used in an embodiment of the present application;

[0043] Figure 3 A schematic diagram of a flow chart of an embodiment of a method for detecting a passive intermodulation signal provided by the present application;

[0044] Figure 4 A schematic structural diagram of an embodiment of the antenna provided in this application;

[0045] Figure 5a A schematic diagram of a grouping method of an antenna array provided by the present application;

[0046] Figure 5b A schematic diagram of another grouping method of an antenna array provided by the present application;

[0047] Figure 5c A schematic diagram of another grouping method of an antenna array provided by the present application;

[0048] Figure 5d A schematic diagram of another grouping method of an antenna array provided by the present application;

[0049] Figure 6a A schematic structural diagram of an embodiment of a transmitting antenna provided in the present application;

[0050] Figure 6b A schematic structural diagram of an embodiment of a receiving antenna provided in the present application;

[0051] Figure 7a A schematic diagram of a grouping method of an antenna array provided by the present application;

[0052] Figure 7b A schematic diagram of another grouping method of an antenna array provided by the present application;

[0053] Figure 7c A schematic diagram of another grouping method of an antenna array provided by the present application;

[0054] Figure 7d A schematic diagram of another grouping method of an antenna array provided by the present application;

[0055] Figure 7e A schematic diagram of another grouping method of an antenna array provided by the present application;

[0056] Figure 8 A schematic diagram of a matrix corresponding to the antenna array provided in this application;

[0057] Fig. 9 A schematic diagram of a flow chart of an implementation method of determining that a second signal includes a first passive intermodulation signal provided by the present application;

[0058] Fig.10 A flowchart of another embodiment of a method for detecting a passive intermodulation signal is provided for the present application;

[0059] Fig.11 A schematic structural diagram of an embodiment of a passive intermodulation signal detection device provided by the present application;

[0060] Fig.12 This is a schematic structural diagram of another embodiment of the passive intermodulation signal detection device provided by the present application. DETAILED DESCRIPTION

[0061] The embodiments of the present application provide a method and device for detecting a passive intermodulation signal, which are used to improve the detection speed of the passive intermodulation signal, thereby improving the positioning speed of the passive intermodulation source.

[0062] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), universal mobile telecommunications system (UMTS), global system for mobile communications (GSM), fifth generation (5G) mobile communication system or new radio (NR) system, or applied to future communication systems, etc.

[0063] Figure 1 A schematic diagram of the structure of a communication system provided by the present application, wherein the communication system includes a network device and at least one terminal device (such as Figure 1 The network device can communicate with at least one terminal device (such as terminal 1) through an uplink (UL) and a downlink (DL). The uplink refers to a physical layer communication link from the terminal device to the network device, and the downlink refers to a physical layer communication link from the network device to the terminal device.

[0064] In an embodiment of the present application, the network device has multiple transmitting antennas and multiple receiving antennas, and can communicate with at least one terminal device using multiple-input multiple-output (MIMO) technology. Multiple transmitting antennas and multiple receiving antennas are combined and arranged according to a certain rule to form an antenna array. Multiple transmitting antennas and receiving antennas on the antenna array are arranged in a straight line to form a linear array. Multiple transmitting antennas and receiving antennas on the antenna array are arranged in a plane, which is a planar array. In an embodiment of the present application, the antenna array can be a linear array or a planar array. This application is not limited to this.

[0065] In the embodiment of the present application, the non-ideal factors for generating passive intermodulation signals are referred to as PIM sources. Since passive intermodulation interference is usually caused by the nonlinear characteristics of various passive components in the transmission channel (such as duplexers, antennas, feeders, RF line connectors, etc.), the PIM source can also be referred to as a nonlinear source.

[0066] It should be understood that there may be multiple network devices in the communication system, and one network device may provide services for multiple terminal devices. The embodiments of the present application do not limit the number of network devices and the number of terminal devices included in the communication system. Figure 1 The network device in the embodiment and some or all of the terminal devices in at least one terminal device can implement the technical solution provided in the embodiment of the present application. In addition, Figure 1 The various terminal devices shown in are only some examples of terminal devices, and it should be understood that the terminal devices in the embodiments of the present application are not limited thereto.

[0067] The solution provided in this application is generally applied to network equipment in a wireless communication system.

[0068] The network device mentioned in the embodiments of the present application, also called access network device, is a device in the network used to access the terminal device to the wireless network. The network device can be a node in the wireless access network, which can also be called a base station, or a RAN node (or device). The network device may be an evolved NodeB (eNodeB) in an LTE system or an evolved LTE system (LTE-Advanced, LTE-A), or may be a next generation node B (gNodeB) in a 5G NR system, or may be a node B (NB), a base station controller (BSC), a base transceiver station (BTS), a transmission reception point (TRP), a home base station (for example, a home evolved NodeB, or a home Node B, HNB), a base band unit (BBU), a WiFi access point (AP), a relay node, an integrated access and backhaul (IAB) node, or a base station in a future mobile communication system, etc., or may be a centralized unit (CU) and a distributed unit (DU), which is not limited in the embodiments of the present application. In the separate deployment scenario where the access network equipment includes CU and DU, CU supports protocols such as radio resource control (RRC), packet data convergence protocol (PDCP), and service data adaptation protocol (SDAP); DU mainly supports radio link control (RLC) layer protocol, media access control (MAC) layer protocol, and physical layer protocol.

[0069] Figure 2A A schematic diagram of the structure of a network device used in an embodiment of the present application; Figure 2B This is a schematic diagram of another embodiment of the network device used in the present application. Figure 2AAs shown, the network device may include a BBU and a remote radio unit (RRU) and an antenna connected to the BBU, wherein the BBU is mainly responsible for baseband algorithm-related calculations, the BBU interacts with the RRU through an interface, and the RRU is connected to the antenna through a feeder. The BBU interacts with the RRU through the common public radio interface (CPRI) or the open base station architecture initiative (OBSAI). It should be understood that Figure 2A The description is made by taking one BBU connected to one RRU as an example. It should be understood that in actual applications, one BBU can be connected to one or more RRUs, and the network equipment can include more BBUs and RRUs connected thereto, which is not limited in this application.

[0070] For example, Figure 2B As shown, the network device may include a BBU and an active antenna processing unit (AAU) connected to the BBU, wherein the BBU is mainly responsible for baseband algorithm related calculations, and the BBU interacts with the AAU through an interface. The BBU interacts with the AAU through CPRI or OBSAI, for example. It should be understood that Figure 2B The description is made by taking a BBU connected to an AAU as an example. It should be understood that in actual applications, a BBU can be connected to one or more AAUs, and the network device can include more BBUs and AAUs connected thereto, and this application does not limit this.

[0071] The terminal device mentioned in the embodiments of the present application is a device with wireless transceiver function, which can be deployed on land, including indoors or outdoors, handheld, wearable or vehicle-mounted; it can also be deployed on the water surface (such as ships, etc.); it can also be deployed in the air (for example, on airplanes, balloons and satellites, etc.). The terminal device can communicate with the core network via a radio access network (RAN) and exchange voice and / or data with the RAN. The terminal device can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a mobile Internet device, a wearable device, a virtual reality terminal device, an augmented reality terminal device, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, etc. The embodiments of the present application do not limit the application scenarios. The terminal device may sometimes also be referred to as user equipment (UE), a mobile station and a remote station, etc. The embodiments of the present application do not limit the specific technology, device form and name adopted by the terminal device.

[0072] The carrier (also referred to as carrier frequency) in the embodiments of the present application refers to a radio wave with a specific frequency and a certain bandwidth (for example, 10M) used to carry the wireless signal to be transmitted. Frequency band refers to a part of the spectrum resources used in wireless communications, such as the 1800M band used in the LTE system. Normally, a frequency band contains multiple carriers. For example, the bandwidth of the 1800M band is 75M, then the frequency band may contain m (m≥1) carriers with a bandwidth of 20M and n (n≥1) carriers with a bandwidth of 10M. Of course, there are other possible carrier division methods, which are not limited in this application. In the present application, a receiving antenna or a transmitting antenna can process a signal containing at least one carrier.

[0073] like Figure 3 As shown, Figure 3 A flowchart of an embodiment of a method for detecting a passive intermodulation signal provided in the present application. This embodiment includes the following steps:

[0074] S101: Transmit a first signal through a first antenna group in an antenna array.

[0075] The antenna array includes at least two antenna groups, and the first antenna group is one of the at least two antenna groups. Each antenna group includes at least one transmitting antenna and at least one receiving antenna. The transmitting antenna is used to transmit a first signal. The receiving antenna is used to receive a passive intermodulation signal generated by the passive intermodulation source excited by the first signal when there is a passive intermodulation source in the area corresponding to the antenna group. The first signal includes at least two carriers of different frequencies to excite the passive intermodulation source to generate a passive intermodulation signal. The first signal can be a random signal, that is, the first signal does not need to be precoded, thereby reducing the complexity of the first signal and improving the detection efficiency of the passive intermodulation signal.

[0076] The transmitting antenna and at least one receiving antenna in the same antenna group are adjacent to each other on the antenna array, and a receiving antenna is adjacent to at least one transmitting antenna on the antenna array. At least one transmitting antenna and at least one receiving antenna in the same antenna group together constitute a part of the antenna array.

[0077] The antenna array can be divided into 2 groups, 3 groups, 4 groups, 8 groups, 16 groups or 32 groups, etc. The number of antenna groups in the antenna array can be adjusted according to the number of antennas in the antenna array (unless otherwise specified, "antenna" in this application is a general term for receiving antennas and transmitting antennas), and this application does not impose any restrictions on this.

[0078] The antennas in the antenna array are in the form of a common transceiver antenna and a separate transceiver antenna. A common transceiver antenna means that the receiving antenna and the transmitting antenna are the same antenna, and a separate transceiver antenna means that the receiving antenna and the transmitting antenna are two antennas respectively. The following examples illustrate the grouping of antenna arrays in the form of common transceiver antennas and antenna arrays in the form of separate transceiver antennas.

[0079] For an antenna array with common transmit and receive antennas, such as Figure 4 As shown, Figure 4 A schematic structural diagram of an embodiment of the antenna provided in this application. Figure 4 The middle antenna is a 1-drive 6-antenna, that is, a common transmit-receive antenna includes 6 antenna elements. Figure 4 From left to right are the dual-polarized antenna (including co-transmitting and receiving antennas in two polarization directions, i.e. two co-transmitting and receiving antennas), the +45° polarized co-transmitting and receiving antenna and the -45° polarized co-transmitting and receiving antenna. Figure 5a to Figure 5d As shown, Figure 5a A schematic diagram of a grouping method of an antenna array provided by the present application; Figure 5b A schematic diagram of another grouping method of an antenna array provided by the present application; Figure 5c A schematic diagram of another grouping method of an antenna array provided by the present application; Figure 5d A schematic diagram of another grouping method of an antenna array provided in the present application. Figure 5a to Figure 5dThe antenna arrays in the figure are composed of 32 co-transmitting and receiving antennas, and there are two co-transmitting and receiving antennas with different polarization directions at the same position. Figure 5a The dashed box indicates that only one polarization direction of the co-transmitting and receiving antenna in the selected area is used, and the solid box indicates that the dual-polarization co-transmitting and receiving antenna in the selected area is used, that is, the two polarization co-transmitting and receiving antennas are grouped into the same group. Figure 5a It means that each group contains a common transmit and receive antenna, that is, 1 transmit antenna and 1 receive antenna, and the antenna array is divided into 32 antenna groups; Figure 5b It means that each group contains 2 co-transmitting and receiving antennas, that is, 2 transmitting antennas and 2 receiving antennas, and the antenna array is divided into 16 antenna groups; Figure 5c It means that each group contains 4 co-transmitting and receiving antennas, that is, 4 transmitting antennas and 4 receiving antennas, and the antenna array is divided into 8 antenna groups; Figure 5d It means that each group contains 8 co-transmitting and receiving antennas, that is, 8 transmitting antennas and 8 receiving antennas, and the antenna array is divided into 4 antenna groups. Of course, the number of co-transmitting and receiving antennas in different antenna groups on the same antenna array can also be different, and this application does not limit this.

[0080] For separate transmit and receive antennas, such as Figure 6a and Figure 6b As shown, Figure 6a A schematic structural diagram of an embodiment of a transmitting antenna provided in the present application; Figure 6b A schematic structural diagram of an embodiment of a receiving antenna provided in the present application. Figure 6a and Figure 6b The medium antenna is a 1-drive 4-antenna, that is, one receiving antenna or one transmitting antenna includes 4 antenna elements. Figure 6a In the figure, from left to right are a dual-polarized transmitting antenna (an antenna with two polarization directions, i.e., two transmitting antennas), a +45° polarized transmitting antenna, and a -45° polarized transmitting antenna; Figure 6b In the figure, from left to right are the dual-polarized receiving antenna (an antenna with two polarization directions, i.e., two receiving antennas), the +45° polarized receiving antenna, and the -45° polarized receiving antenna. Figures 7a to 7e As shown, Figure 7a A schematic diagram of a grouping method of an antenna array provided by the present application; Figure 7b A schematic diagram of another grouping method of an antenna array provided by the present application; Figure 7c A schematic diagram of another grouping method of an antenna array provided by the present application; Figure 7d A schematic diagram of another grouping method of an antenna array provided by the present application; Figure 7e A schematic diagram of another grouping method of an antenna array provided in the present application. Figures 7a to 7eThe antenna arrays in the example are 32 transmitting antennas and 32 receiving antenna arrays, and there are two receiving antennas or transmitting antennas with different polarization directions at the same position. In the grouping scenario where transmission and reception are separated, since the transmitting antenna and the receiving antenna appear at intervals, the receiving antenna can be used as a reference to group the receiving antennas and the transmitting antennas adjacent to them on both sides into the same group; or the transmitting antenna can be used as a reference to group the transmitting antennas and the receiving antennas adjacent to them on both sides into the same group. This embodiment takes the former as an example. Figure 7a The dashed box indicates that only antennas with one polarization direction in the selected area are used, and the solid box indicates dual-polarization antennas in the selected area, that is, antennas with two polarization directions are grouped into the same group. Figure 7a It means that each group contains 2 transmitting antennas and 1 receiving antenna, and the antenna array is divided into 32 antenna groups; Figure 7b It means that each group contains 4 transmitting antennas and 2 receiving antennas, for a total of 16 antenna groups; Figure 7c It means that each group contains 6 transmitting antennas and 4 receiving antennas, and the antenna array is divided into 8 antenna groups; Figure 7d It means that each group contains 8 transmitting antennas and 6 receiving antennas, and the antenna array is divided into 6 antenna groups; Figure 7e It means that each group contains 10 transmitting antennas and 8 receiving antennas, and the antenna array is divided into 4 antenna groups. In the grouping of the antenna array with separate transmitting and receiving antennas, the number of transmitting antennas and receiving antennas in each antenna group is different, and the same transmitting antenna may be divided into two antenna groups. Of course, the number of transmitting antennas and receiving antennas in each antenna group can also be the same. This application does not limit this.

[0081] For antenna arrays with separate transmit and receive antennas, and when the number of transmit antennas and receive antennas in each group is different, the total number of antennas in different antenna groups may be different. Figure 7d In the example, the antenna groups at the right edge of the other non-antenna arrays include 8 transmit antennas and 6 receive antennas, while the antenna group R at the right edge of the antenna array includes only 4 transmit antennas and 4 receive antennas. Figure 7d The arrangement of the antenna array is not a limitation to the present application.

[0082] The grouping of the antenna array can be pre-set or automatically divided according to a preset rule. For example, each antenna on the antenna array has a number, and the numbers are arranged according to the arrangement position of the corresponding antenna on the antenna array to form a matrix. The preset rule is, for example, a selection window of a preset size and a preset step size. Figure 8 As shown, Figure 8 A schematic diagram of the matrix corresponding to the antenna array provided in the present application, for example, the preset size of the selection window is 1*2, the step size is 2, that is, 2 antennas are selected as a group each time, and the antennas in each antenna group do not overlap. Figure 8The antenna array in is divided into 8 groups according to the preset rules: the two antennas numbered 00 and 01 are one group, the antennas numbered 02 and 03 are one group... the two antennas numbered 12 and 13 are one group, and the two antennas numbered 14 and 15 are one group. Of course, Figure 8 As just an example, the number of antennas in the antenna array, the arrangement, and the selection window size and step size are adjusted according to actual conditions and are not intended to limit the present application.

[0083] In the embodiment of the present application, only the transmitting antenna in one antenna group in the antenna array is stimulated to transmit the first signal each time, so as to reduce the interference caused by the operation of other antenna groups, thereby improving the detection accuracy of the passive intermodulation signal.

[0084] S102: Acquire a first received power and a second received power.

[0085] Among them, the first receiving power is the receiving power of the second signal received by the first antenna group, and the second receiving power is the receiving power of the third signal received by the second antenna group. The second antenna group is an antenna group other than the first antenna group among the at least two antenna groups of the antenna array. The first antenna group transmits a first signal, and all antenna groups on the antenna array receive the signal. The receiving time periods corresponding to the second signal and the third signal are the same. The receiving time periods corresponding to the second signal and the third signal may include the transmitting time period of transmitting the first signal, and the receiving time period may also be the time period after transmitting the first signal. This application does not impose any restrictions on this.

[0086] The second signal is specifically a signal received by the first receiving antenna in the first antenna group during the receiving time period, and the third signal is specifically a signal received by the second receiving antenna in the second antenna group during the receiving time period. When there is a passive intermodulation source in the first antenna group, the passive intermodulation source is excited by the first signal to generate a first passive intermodulation signal, and the second signal includes the first passive intermodulation signal. When the first antenna group generates the first passive intermodulation signal, the first passive intermodulation signal may be received by the second antenna group. However, since the passive intermodulation source in the first antenna group is closer to the receiving antenna in the first antenna group, the signal strength of the first passive intermodulation signal received by the first antenna group is greater than the signal strength of the first passive intermodulation signal received by the second antenna group, and the signal strength of the second signal is also greater than the signal strength of the third signal. The greater the signal strength of the signal, the greater the corresponding receiving power of the receiving antenna when receiving the signal.

[0087] In an embodiment of the present application, when the number of first receiving antennas in the first antenna group is only one and the number of second receiving antennas in the second antenna group is also only one, then the first receiving power is the receiving power corresponding to the second signal received by the first receiving antenna, and the second receiving power is the receiving power corresponding to the third signal received by the second receiving antenna.

[0088] When the first antenna group includes at least two first receiving antennas and the second antenna group includes at least two second receiving antennas, the first receiving power and the second receiving power may be calculated in any of the following three ways:

[0089] Mode 1: The first received power is an average value of received powers corresponding to at least two first receiving antennas, and the second received power is an average value of received powers corresponding to at least two second receiving antennas.

[0090] Mode 2: The first receiving power is the sum of the receiving powers corresponding to at least two first receiving antennas, and the second receiving power is the sum of the receiving powers corresponding to at least two second receiving antennas. Mode 2 is applicable to the case where the number of first receiving antennas is equal to the number of second receiving antennas.

[0091] Mode three: the first receiving power is the maximum value of the receiving powers corresponding to at least two first receiving antennas, and the second receiving power is the maximum value of the receiving powers corresponding to at least two second receiving antennas.

[0092] S103: Determine, according to the first received power and the second received power, that the second signal includes a first passive intermodulation signal corresponding to the first antenna group.

[0093] There are multiple ways to determine that the second signal includes the first passive intermodulation signal:

[0094] Method 1:

[0095] When the maximum value among the received powers corresponding to all antenna groups on the antenna array is the first received power, it is determined that the second signal includes the first passive intermodulation signal.

[0096] Compare the first received power and the second received power, and when the first received power is greater than the second received power, determine that the second signal includes the first passive intermodulation signal. Since the received power is positively correlated with the signal strength of the received signal, the first received power being greater than the second received power indicates that the signal strength of the second signal is greater than the signal strength of the third signal, which indicates that the second signal includes the first passive intermodulation signal, and thus it can be determined that there is a passive intermodulation source in the area where the first antenna group on the antenna array is located.

[0097] Specifically, the first received power and the second received power corresponding to each second antenna group can be compared respectively, and when the first received power is greater than all the second received powers, it is determined that the second signal includes the first passive intermodulation signal. In this way, the accuracy of passive intermodulation signal detection can be improved.

[0098] Of course, the first received power can also be compared with the second received power corresponding to the adjacent second antenna group. When the first received power is greater than the second received power corresponding to the adjacent second antenna group, it is determined that the second signal includes the first passive intermodulation signal. The adjacent second antenna group refers to the second antenna group that is adjacent to the first antenna group on the antenna array. In this way, the number of comparisons can be reduced, and the time for comparing the first received power and the second received power can be reduced, thereby improving the efficiency of detecting the passive intermodulation signal.

[0099] When the maximum value among the received powers corresponding to all antenna groups on the antenna array is not the first received power, it can be determined that the area where the first antenna group is located does not include a passive intermodulation source.

[0100] Method 2:

[0101] This method is applicable to the case where the number of antenna groups in the antenna array is greater than two, that is, the number of the second antenna groups is at least two.

[0102] like Fig. 9 As shown, Fig. 9 A flowchart of an implementation method of determining that the second signal includes a first passive intermodulation signal provided by the present application. This method includes the following steps:

[0103] S1031: Obtain a first target power and a second target power.

[0104] The first target power is the power corresponding to the first antenna group set, and the second target power is the power corresponding to the second antenna group set. The first antenna group set includes antenna groups other than the first antenna group in the antenna array. The second antenna group set includes antenna groups other than the second antenna group in the antenna array. When there are at least two second antenna groups, each second antenna group has a corresponding second antenna group set, and the second antenna group set includes other second antenna groups other than the second antenna group, or the second antenna group set also includes the first antenna group.

[0105] Optionally, the first antenna group set is a set of antenna groups adjacent to the first antenna group position on the antenna array, and the second antenna group set is a set of antenna groups adjacent to the second antenna group position on the antenna array. Of course, the first antenna group set may also be a set of all antenna groups on the antenna array except the first antenna group, and the second antenna group set may also be a set of all antenna groups except a certain second antenna group. This application does not impose any restrictions on this.

[0106] by Figure 5c Take an example to illustrate, Figure 5cThe antenna array in includes 8 antenna groups 1 to 8. When antenna group 1 is the first antenna group, antenna groups 2-8 are the second antenna group. Then, antenna group 2, antenna group 5 and antenna group 6 are adjacent to antenna group 1 on the antenna array, and the first antenna group set includes antenna group 2, antenna group 5 and antenna group 6. The antenna groups adjacent to antenna group 2 are antenna group 1, antenna group 3, antenna group 5, antenna group 6 and antenna group 7, and the second antenna group set A includes antenna group 1, antenna group 3, antenna group 5, antenna group 6 and antenna group 7. The antenna groups adjacent to antenna group 3 are antenna group 2, antenna group 4, antenna group 6, antenna group 7 and antenna group 8, and the second antenna group set B includes antenna group 2, antenna group 4, antenna group 6, antenna group 7 and antenna group 8. By analogy, the second antenna group set C corresponding to antenna group 4 includes antenna group 3, antenna group 7 and antenna group 8, the second antenna group set D corresponding to antenna group 5 includes antenna group 1, antenna group 2 and antenna group 6, the second antenna group E corresponding to antenna group 6 includes antenna groups 1-3, antenna group 5 and antenna group 7, the second antenna group F corresponding to antenna group 7 includes antenna groups 2-4, antenna group 6 and antenna group 8, and the second antenna group G corresponding to antenna group 8 includes antenna group 3, antenna group 4 and antenna group 7.

[0107] In some other implementations, the adjacent antenna groups may not include the diagonal antenna groups. For example, the first antenna group set includes antenna group 2 and antenna group 5, but does not include the diagonal antenna group 6; the second antenna group set A includes antenna group 1, antenna group 3, and antenna group 6, but does not include antenna group 5 and antenna group 7. This application does not limit this.

[0108] The first target power may specifically be the average value of the received powers of all antenna groups in the first antenna group set, and the second target power may specifically be the average value of the received powers of all antenna groups in the second antenna group set. In some other implementations, the first target power may be the maximum value of the received powers of all antenna groups in the first antenna group set, and the second target power may be the maximum value of the received powers of all antenna groups in the second antenna group set. This application does not limit this.

[0109] S1032: Determine, according to the first received power, the first target power, the second received power, and the second target power, that the second signal includes a first passive intermodulation signal.

[0110] Specifically, a first target value is obtained according to the first received power and the first target power. A second target value is obtained according to the second received power and the second target power. When the first target value is greater than the second target value, it is determined that the second signal includes the first passive intermodulation signal.

[0111] The first target value may be a ratio between the first received power and the first target power, wherein the first received power is the dividend and the first target power is the divisor; the second target value may be a ratio between the second received power and the second target power, wherein the second received power is the dividend and the second target power is the divisor.

[0112] In some other embodiments, the first target value may also be the difference between the first received power and the first target power, wherein the first received power is the minuend and the first target power is the subtrahend; the second target value may be the difference between the second received power and the second target power, wherein the second received power is the minuend and the second target power is the subtrahend.

[0113] The first target value is greater than the second target value, indicating that the first received power is significantly greater than the received power of the adjacent antenna group, so that it can be determined that the second signal includes the first passive intermodulation signal, and further it can be determined that there is a passive intermodulation source in the area where the first antenna group is located.

[0114] When the first target is less than or equal to the second target value, it means that the signal strength of the second signal received by the first antenna group is not significantly higher than the signal strength of the third signal received by the second antenna group, and it can be determined that the area where the first antenna group is located does not include a passive intermodulation source.

[0115] In an embodiment of the present application, the antenna array is divided into a plurality of antenna groups, and one of the antenna groups is determined to be the first antenna group, and the first antenna group is activated to transmit a first signal, thereby activating a possible passive intermodulation source in the first antenna group to generate a passive intermodulation signal, and obtaining a first receiving power in the process of the first antenna group receiving the second signal and a second receiving power in the process of the second antenna group receiving the third signal. The first receiving power and the second receiving power can be used to determine whether the second signal received by the first antenna group includes a passive intermodulation signal, thereby determining whether there is a passive intermodulation source in the first antenna group. The embodiment of the present application does not require the aid of external equipment for detection, thereby reducing the detection cost, and each time a group of antenna groups is activated, it can be detected whether the activated first antenna group generates a passive intermodulation signal, thereby determining whether there is a passive intermodulation source in the first antenna group, and thereby improving the positioning speed of the passive intermodulation source.

[0116] Furthermore, each antenna group in the antenna array is traversed, and each antenna group is used as a first antenna group to perform operations S101 to S103 to detect whether there is a passive intermodulation source in the area where the antenna group is located.

[0117] When the number of antenna groups divided by the antenna array is small and the number of antennas in the antenna group is large, the detection speed of the passive intermodulation source can be improved, but the detection accuracy will be lost; when the number of antenna groups divided by the antenna array is large and the number of antennas in the antenna group is small, the detection accuracy of the passive intermodulation source can be improved, but the number of detections will increase, thereby reducing the detection efficiency. In order to take into account the detection speed and detection accuracy of the passive intermodulation source on the antenna array, such as Fig.10 As shown, Fig.10 A flowchart of another embodiment of a method for detecting a passive intermodulation signal is provided for the present application. Different from the previous embodiment, in this embodiment, after determining that the second signal includes a passive intermodulation signal, that is, determining that the first antenna group includes a passive intermodulation source, the sub-antenna group in the first antenna group is further detected. This embodiment includes the following steps:

[0118] S201: Transmit a first signal through a first antenna group in an antenna array.

[0119] In this embodiment, the total number of transmitting antennas and receiving antennas in the first antenna group is at least 4. For example, the first antenna group may include 2 transmitting antennas and 2 receiving antennas, or 4 transmitting antennas and 4 receiving antennas, or 8 receiving antennas and 8 transmitting antennas, etc. The number of antennas in the first antenna group can be determined according to the total number of antennas on the antenna array. Generally, the more antennas on the antenna array, the more antennas in the first antenna group, and this application does not limit this.

[0120] The first antenna group is further divided into at least two sub-antenna groups, and each sub-antenna group includes at least one transmitting antenna and one receiving antenna.

[0121] S202: Acquire a first received power and a second received power.

[0122] This step may be specifically referred to as step S102, so it will not be described again here.

[0123] S203: Determine, according to the first received power and the second received power, that the second signal includes a first passive intermodulation signal corresponding to the first antenna group.

[0124] This step may be specifically referred to as step S103, so it will not be described again here.

[0125] S204: Transmit a fourth signal through a first sub-antenna group, where the first sub-antenna group is one of the at least two sub-antenna groups.

[0126] The fourth signal may be the same as or different from the first signal, and this application does not impose any limitation on this.

[0127] When the transmitting antenna in the first sub-antenna group is activated to transmit the fourth signal, the transmitting antennas in other sub-antenna groups in the first antenna group are not activated.

[0128] S205: Obtain a third received power and a fourth received power.

[0129] The third receiving power is the receiving power of the fifth signal received by the first sub-antenna group, and the fourth receiving power is the receiving power of the sixth signal received by the second sub-antenna group. The second sub-antenna group is a sub-antenna group other than the first sub-antenna group among the at least two sub-antenna groups, and the receiving time periods corresponding to the fifth signal and the sixth signal are the same.

[0130] The calculation method of the third received power and the fourth received power may refer to the first received power and the second received power in S102, so it will not be repeated here.

[0131] S206: Determine, according to the third received power and the fourth received power, that the fifth signal includes a second passive intermodulation signal corresponding to the first sub-antenna group.

[0132] The second passive intermodulation signal is excited by the fourth signal.

[0133] There are multiple ways to determine that the fifth signal includes the second passive intermodulation signal corresponding to the first sub-antenna group:

[0134] Method 1:

[0135] When the maximum value of the received powers corresponding to all the sub-antenna groups in the first antenna group is the third received power, it is determined that the fifth signal includes the second passive intermodulation signal.

[0136] Specifically, when the third received power is greater than the fourth received power corresponding to all the second sub-antenna groups, it is determined that the fifth signal includes the second passive intermodulation signal.

[0137] Alternatively, when the third received power is greater than a fourth received power corresponding to a second antenna group adjacent to the first sub-antenna group, it is determined that the fifth signal includes a second passive intermodulation signal.

[0138] When the maximum value of the received powers corresponding to all the sub-antenna groups in the first antenna group is not the third received power, it is determined that the fifth signal does not include the second passive intermodulation signal.

[0139] Method 2:

[0140] Obtain a third target power and a fourth target power, where the third target power is the power corresponding to the first sub-antenna group set, and the fourth target power is the power corresponding to the second sub-antenna group set. The first sub-antenna group set is the sub-antenna group in the first antenna group except the first sub-antenna group, and the second sub-antenna group set is the sub-antenna group in the first antenna group except the second sub-antenna group.

[0141] Optionally, the first sub-antenna group set is a sub-antenna group adjacent to the first sub-antenna group in the first antenna group, and the second sub-antenna group set is a sub-antenna group adjacent to the second sub-antenna group in the first antenna group.

[0142] The definition of the first antenna sub-group set may refer to the first antenna sub-group set in S1031, and the definition of the second antenna sub-group set may refer to the second antenna sub-group set in S1031. The third target power may refer to the first target power in S1031, and the fourth target power may refer to the second target power in S1031, so they will not be described in detail here.

[0143] It is determined that the fifth signal includes a second passive intermodulation signal according to the third received power, the third target power, the fourth received power and the fourth target power.

[0144] Specifically, the third target value is obtained according to the third received power and the third target power, and the fourth target value is obtained according to the fourth received power and the fourth target power. The method for obtaining the third target value can refer to the method for obtaining the first target value in S1032, and the method for obtaining the fourth target value can refer to the method for obtaining the second target value in S1032, so it is not repeated here.

[0145] When the third target value is greater than the fourth target value, it is determined that the fifth signal includes a second passive intermodulation signal.

[0146] The third target value is greater than the fourth target value, indicating that the third received power is significantly greater than the received power of the adjacent sub-antenna group, thereby being able to determine that the fifth signal includes the second passive intermodulation signal, and further being able to determine that there is a passive intermodulation source in the area where the first sub-antenna group is located.

[0147] When the third target is less than or equal to the fourth target value, it is determined that the area where the first sub-antenna group is located does not include a passive intermodulation source.

[0148] by Figure 5d For example, the antenna array includes 4 antenna groups, P, Q, M and N, each of which includes 8 transmitting antennas and 8 receiving antennas. Each antenna group is further divided into 4 sub-antenna groups, each of which includes 2 transmitting antennas and 2 receiving antennas (a sub-antenna group is a dual-polarization co-transmitting and receiving antenna at the same position).

[0149] First, the operations of S201 to S203 are performed on the four antenna groups P, Q, M and N in turn to determine whether there is a passive intermodulation source in the antenna group P. In this process, the antenna group needs to be stimulated 4 times to send the first signal. Then, the operations of S204 to S206 are performed on each antenna group in the antenna group P in turn to determine which sub-antenna group is located in the area where the passive intermodulation source is located. In this process, the sub-antenna group needs to be stimulated 4 times to send the fifth signal. A maximum of 8 excitation operations can locate the passive intermodulation source. For the same antenna array, when each antenna group includes 2 transmitting antennas and 2 receiving antennas, the operations of S201 to S203 need to be performed 16 times to locate the passive intermodulation source in the antenna array. For the same antenna array, when each antenna group includes 4 transmitting antennas and 4 receiving antennas, the operations of S201 to S203 are performed 8 times, which will result in insufficient positioning accuracy of the passive intermodulation source.

[0150] Therefore, based on the method of this embodiment, it is possible to ensure the positioning accuracy of the passive intermodulation source and to improve the positioning speed of the passive intermodulation source.

[0151] The following is a description of the passive intermodulation signal detection device according to an embodiment of the present application. Fig.11 As shown, Fig.11 The structure diagram of an embodiment of a detection device for passive intermodulation signals provided by the present application is shown in FIG. The detection device for passive intermodulation signals is used to implement each step in each embodiment of the detection method for passive intermodulation signals described above.

[0152] In the embodiment of the present application, the passive intermodulation signal detection device 1100 includes a control module 1101 , an acquisition module 1102 and a determination module 1103 .

[0153] Specifically, a control module 1101 is used to control a first antenna group in an antenna array to transmit a first signal, the antenna array includes at least two antenna groups, and the first antenna group is one of the at least two antenna groups; an acquisition module 1102 is used to obtain a first received power and a second received power, the first received power is the received power of a second signal received by the first antenna group, and the second received power is the received power of a third signal received by the second antenna group, the second antenna group is an antenna group other than the first antenna group among the at least two antenna groups, and the receiving time periods corresponding to the second signal and the third signal are the same; a determination module 1103 is used to determine, based on the first received power and the second received power, that the second signal includes a first passive intermodulation signal corresponding to the first antenna group, and the first passive intermodulation signal is excited by the first signal.

[0154] Optionally, the determination module 1103 is specifically configured to determine that the second signal includes a first passive intermodulation signal when the first received power is greater than the second received power.

[0155] Optionally, the acquisition module 1102 is also used to obtain a first target power and a second target power, the first target power is the power corresponding to the first antenna group set, and the second target power is the power corresponding to the second antenna group set, the first antenna group set includes antenna groups in the antenna array except the first antenna group, and the second antenna group set includes antenna groups in the antenna array except the second antenna group; the determination module 1103 is specifically used to determine that the second signal includes a first passive intermodulation signal based on the first received power, the first target power, the second received power and the second target power.

[0156] Optionally, the acquisition module 1102 is also used to acquire a first target value based on the first received power and the first target power; the acquisition module 1102 is also used to acquire a second target value based on the second received power and the second target power; the determination module 1103 is specifically used to determine that the second signal includes a first passive intermodulation signal when the first target value is greater than the second target value.

[0157] Optionally, the first antenna group set includes antenna groups adjacent to the first antenna group on the antenna array, and the second antenna group set includes antenna groups adjacent to the second antenna group on the antenna array.

[0158] Optionally, the first antenna group includes at least two sub-antenna groups: the control module 1101 is also used to control the first sub-antenna group to transmit a fourth signal, and the first sub-antenna group is one of the at least two sub-antenna groups; the acquisition module 1102 is also used to obtain a third received power and a fourth received power, the third received power is the received power of the fifth signal received by the first sub-antenna group, the fourth received power is the received power of the sixth signal received by the second sub-antenna group, the second sub-antenna group is a sub-antenna group other than the first sub-antenna group among the at least two sub-antenna groups, and the receiving time periods corresponding to the fifth signal and the sixth signal are the same; the determination module 1103 is also used to determine, based on the third received power and the fourth received power, that the fifth signal includes a second passive intermodulation signal corresponding to the first sub-antenna group, and the second passive intermodulation signal is excited by the fourth signal.

[0159] Optionally, the determination module 1103 is specifically configured to determine that the fifth signal includes a second passive intermodulation signal when the third received power is greater than the fourth received power.

[0160] Optionally, the acquisition module 1102 is also used to obtain a third target power and a fourth target power, the third target power is the power corresponding to the first sub-antenna group set, the fourth target power is the power corresponding to the second sub-antenna group set, the first sub-antenna group set includes the sub-antenna groups in the first antenna group except the first sub-antenna group, and the second sub-antenna group set includes the sub-antenna groups in the first antenna group except the second sub-antenna group; the determination module 1103 is specifically used to determine that the fifth signal includes the second passive intermodulation signal based on the third received power, the third target power, the fourth received power and the fourth target power.

[0161] Optionally, the acquisition module 1102 is also used to acquire a third target value based on the third received power and the third target power; the acquisition module 1102 is also used to acquire a fourth target value based on the fourth received power and the fourth target power; the determination module 1103 is also used to determine that the fifth signal includes a second passive intermodulation signal when the third target value is greater than the fourth target value.

[0162] Optionally, the first sub-antenna group set includes sub-antenna groups in the first antenna group that are adjacent to the first sub-antenna group, and the second sub-antenna group set includes sub-antenna groups in the first antenna group that are adjacent to the second sub-antenna group.

[0163] The passive intermodulation signal detection device 1100 provided in the embodiment of the present application can be understood by referring to the corresponding contents of the aforementioned passive intermodulation signal detection method embodiment part, which will not be repeated here.

[0164] like Fig.12 As shown, Fig.12 This is a schematic diagram of the structure of another embodiment of a detection device for passive intermodulation signals provided by the present application. The device may be specifically a network device, such as a base station, for implementing the functions of the network device involved in any of the above method embodiments.

[0165] The network device includes: one or more radio frequency units, such as a remote radio unit (RRU) 1201 and one or more baseband units (BBU) (also called digital unit, digital unit, DU) 1202. The RRU 1201 can be called a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., which may include at least one antenna 12011 and a radio frequency unit 12012. The RRU 1201 part is mainly used for the transmission and reception of radio frequency signals and the conversion of radio frequency signals and baseband signals. The BBU 1202 part is mainly used for baseband processing, controlling the base station, etc. The RRU 1201 and BBU 1202 can be physically set together or physically separated, that is, a distributed base station.

[0166] The BBU 1202 is the control center of the base station, which can also be called a processing unit, and is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, spread spectrum, etc. For example, the BBU (processing unit) 1202 can be used to control the base station to execute the operation process of the network device in the above method embodiment.

[0167] In one example, the BBU 1202 may be composed of one or more single boards, and multiple single boards may jointly support a wireless access network with a single access indication (such as an LTE network), or may respectively support wireless access networks with different access standards (such as an LTE network, a 5G network, or other networks). The BBU 1202 may also include a memory 12021 and a processor 12022, and the memory 12021 is used to store necessary instructions and data. The processor 12022 is used to control the base station to perform necessary actions, for example, to control the base station to perform the sending operation in the above method embodiment. The memory 12021 and the processor 12022 may serve one or more single boards. In other words, a memory and a processor may be separately set on each single board. It is also possible that multiple single boards share the same memory and processor. In addition, necessary circuits may also be set on each single board.

[0168] In another embodiment of the present application, a computer-readable storage medium is further provided, wherein the computer-readable storage medium stores computer-executable instructions. When at least one processor of the device executes the computer-executable instructions, the device executes the above Figure 3 , Fig. 9 and Fig.10 The passive intermodulation signal detection method described in the embodiment.

[0169] In another embodiment of the present application, a chip system is further provided, the chip system comprising at least one processor and an interface, the interface being used to receive data and / or signals, and at least one processor being used to support the implementation of the above Figure 3 , Fig. 9 and Fig.10 The detection method of the passive intermodulation signal described in the embodiment. In a possible design, the chip system may also include a memory, which is used to store program instructions and data necessary for the computer device. The chip system may be composed of a chip, or may include a chip and other discrete devices.

[0170] 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 units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0171] The above description uses specific examples to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A method for detecting a passive intermodulation signal, It is characterized in that The method comprises: Transmitting a first signal through a first antenna group in an antenna array, wherein the antenna array includes at least two antenna groups, and the first antenna group is one of the at least two antenna groups; Acquire a first received power and a second received power, where the first received power is the received power of a second signal received by the first antenna group, and the second received power is the received power of a third signal received by the second antenna group, where the second antenna group is an antenna group other than the first antenna group among the at least two antenna groups, and the second signal and the third signal have the same receiving time period; According to the first received power and the second received power, it is determined that the second signal includes a first passive intermodulation signal corresponding to the first antenna group, and the first passive intermodulation signal is excited by the first signal.

2. The method according to claim 1, It is characterized in that The determining, according to the first received power and the second received power, that the second signal includes the first passive intermodulation signal corresponding to the first antenna group comprises: When the first received power is greater than the second received power, it is determined that the second signal includes the first passive intermodulation signal.

3. The method according to claim 1, It is characterized in that The determining, according to the first received power and the second received power, that the second signal includes a first passive intermodulation signal corresponding to the first antenna group includes: Obtain a first target power and a second target power, where the first target power is power corresponding to a first antenna group set, and the second target power is power corresponding to a second antenna group set, where the first antenna group set includes antenna groups other than the first antenna group in the antenna array, and the second antenna group set includes antenna groups other than the second antenna group in the antenna array; Determine, according to the first received power, the first target power, the second received power, and the second target power, that the second signal includes the first passive intermodulation signal.

4. The method according to claim 3, It is characterized in that The determining, according to the first received power, the first target power, the second received power, and the second target power, that the second signal includes the first passive intermodulation signal comprises: Acquire a first target value according to the first received power and the first target power; Acquire a second target value according to the second received power and the second target power; When the first target value is greater than the second target value, it is determined that the second signal includes the first passive intermodulation signal.

5. The method according to claim 3 or 4, It is characterized in that The first antenna group set includes antenna groups that are adjacent to the first antenna group on the antenna array, and the second antenna group set includes antenna groups that are adjacent to the second antenna group on the antenna array.

6. The method according to any one of claims 1 to 4, It is characterized in that The first antenna group includes at least two sub-antenna groups, and the method further includes: Transmitting a fourth signal through a first sub-antenna group, where the first sub-antenna group is one of the at least two sub-antenna groups; Acquire a third received power and a fourth received power, where the third received power is the received power of a fifth signal received by the first sub-antenna group, and the fourth received power is the received power of a sixth signal received by the second sub-antenna group, where the second sub-antenna group is a sub-antenna group other than the first sub-antenna group among the at least two sub-antenna groups, and the fifth signal and the sixth signal have the same receiving time period; According to the third received power and the fourth received power, it is determined that the fifth signal includes a second passive intermodulation signal corresponding to the first sub-antenna group, and the second passive intermodulation signal is excited by the fourth signal.

7. The method according to claim 6, It is characterized in that The determining, according to the third received power and the fourth received power, that the fifth signal includes a second passive intermodulation signal corresponding to the first sub-antenna group comprises: When the third received power is greater than the fourth received power, it is determined that the fifth signal includes the second passive intermodulation signal.

8. The method according to claim 6, It is characterized in that The determining, according to the third received power and the fourth received power, that the fifth signal includes a second passive intermodulation signal corresponding to the first sub-antenna group comprises: Obtaining a third target power and a fourth target power, where the third target power is power corresponding to a first sub-antenna group set, and the fourth target power is power corresponding to a second sub-antenna group set, where the first sub-antenna group set includes sub-antenna groups other than the first sub-antenna group in the first antenna group, and the second sub-antenna group set includes sub-antenna groups other than the second sub-antenna group in the first antenna group; It is determined that the fifth signal includes the second passive intermodulation signal according to the third received power, the third target power, the fourth received power and the fourth target power.

9. The method according to claim 8, It is characterized in that The determining, according to the third received power, the third target power, the fourth received power, and the fourth target power, that the fifth signal includes the second passive intermodulation signal comprises: Acquire a third target value according to the third received power and the third target power; Acquire a fourth target value according to the fourth received power and the fourth target power; When the third target value is greater than the fourth target value, it is determined that the fifth signal includes the second passive intermodulation signal.

10. The method according to claim 8 or 9, It is characterized in that The first sub-antenna group set includes sub-antenna groups in the first antenna group that are adjacent to the first sub-antenna group, and the second sub-antenna group set includes sub-antenna groups in the first antenna group that are adjacent to the second sub-antenna group.

11. A detection device for passive intermodulation signals, It is characterized in that The device comprises: A control module, configured to control a first antenna group in an antenna array to transmit a first signal, wherein the antenna array includes at least two antenna groups, and the first antenna group is one of the at least two antenna groups; an acquisition module, configured to acquire a first received power and a second received power, wherein the first received power is the received power of a second signal received by the first antenna group, and the second received power is the received power of a third signal received by the second antenna group, wherein the second antenna group is an antenna group other than the first antenna group among the at least two antenna groups, and the second signal and the third signal have the same receiving time period; A determination module is used to determine, based on the first received power and the second received power, that the second signal includes a first passive intermodulation signal corresponding to the first antenna group, and the first passive intermodulation signal is excited by the first signal.

12. The device according to claim 11, It is characterized in that The determination module is specifically configured to determine that the second signal includes the first passive intermodulation signal when the first received power is greater than the second received power.

13. The device according to claim 11, It is characterized in that The acquisition module is further used to acquire a first target power and a second target power, the first target power being the power corresponding to a first antenna group set, the second target power being the power corresponding to a second antenna group set, the first antenna group set including antenna groups other than the first antenna group in the antenna array, and the second antenna group set including antenna groups other than the second antenna group in the antenna array; The determination module is specifically configured to determine, according to the first received power, the first target power, the second received power, and the second target power, that the second signal includes the first passive intermodulation signal.

14. The device according to claim 13, It is characterized in that The acquisition module is further used to acquire a first target value according to the first received power and the first target power; The acquisition module is further used to acquire a second target value according to the second received power and the second target power; The determination module is specifically configured to determine that the second signal includes the first passive intermodulation signal when the first target value is greater than the second target value.

15. The device according to claim 13 or 14, It is characterized in that The first antenna group set includes antenna groups that are adjacent to the first antenna group on the antenna array, and the second antenna group set includes antenna groups that are adjacent to the second antenna group on the antenna array.

16. The device according to any one of claims 11 to 14, It is characterized in that The first antenna group includes at least two sub-antenna groups: The control module is further used to control the first sub-antenna group to transmit a fourth signal, wherein the first sub-antenna group is one of the at least two sub-antenna groups; The acquisition module is further used to acquire a third received power and a fourth received power, the third received power being the received power of the fifth signal received by the first sub-antenna group, the fourth received power being the received power of the sixth signal received by the second sub-antenna group, the second sub-antenna group being the sub-antenna group other than the first sub-antenna group among the at least two sub-antenna groups, and the fifth signal and the sixth signal corresponding to the same receiving time period; The determination module is further used to determine, based on the third received power and the fourth received power, that the fifth signal includes a second passive intermodulation signal corresponding to the first sub-antenna group, and the second passive intermodulation signal is excited by the fourth signal.

17. The device according to claim 16, It is characterized in that The determination module is specifically configured to determine, when the third received power is greater than the fourth received power, that the fifth signal includes the second passive intermodulation signal.

18. The device according to claim 16, It is characterized in that The acquisition module is further used to acquire a third target power and a fourth target power, the third target power being the power corresponding to the first sub-antenna group set, the fourth target power being the power corresponding to the second sub-antenna group set, the first sub-antenna group set including the sub-antenna groups in the first antenna group except the first sub-antenna group, and the second sub-antenna group set including the sub-antenna groups in the first antenna group except the second sub-antenna group; The determination module is specifically configured to determine, according to the third received power, the third target power, the fourth received power and the fourth target power, that the fifth signal includes the second passive intermodulation signal.

19. The device according to claim 18, It is characterized in that The acquisition module is further used to acquire a third target value according to the third received power and the third target power; The acquisition module is further used to acquire a fourth target value according to the fourth received power and the fourth target power; The determination module is further configured to determine that the fifth signal includes the second passive intermodulation signal when the third target value is greater than the fourth target value.

20. The device according to claim 18 or 19, It is characterized in that The first sub-antenna group set includes sub-antenna groups in the first antenna group that are adjacent to the first sub-antenna group, and the second sub-antenna group set includes sub-antenna groups in the first antenna group that are adjacent to the second sub-antenna group.

21. A detection device for passive intermodulation signals, It is characterized in that include: A processor, the processor is coupled to a memory, the memory is used to store programs or instructions, when the program or instruction is executed by the processor, the passive intermodulation signal detection device performs the method as described in any one of claims 1 to 10.

22. A computer-readable storage medium having instructions stored thereon, which, when the instructions are executed on a computer, enable the computer to execute the method according to any one of claims 1 to 10.

23. A chip system, It is characterized in that The method comprises at least one processor and an interface, wherein the interface is used to receive data and / or signals, and the at least one processor is configured to execute the method according to any one of claims 1 to 10.

Images