CN115642966A

CN115642966A - Method and device for detecting passive intermodulation signal

Info

Publication number: CN115642966A
Application number: CN202110813482.2A
Authority: CN
Inventors: 杨智; 霍强; 王敬伦; 邹志强; 陈炜
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-07-19
Filing date: 2021-07-19
Publication date: 2023-01-24
Also published as: WO2023000753A1

Abstract

The embodiment of the application discloses a method and a device for detecting a passive intermodulation signal, which are used for quickly detecting the passive intermodulation signal at low cost. The method comprises the following steps: transmitting a first signal through a first antenna group in an antenna array; acquiring first receiving power when a first antenna group receives a second signal and second receiving power when a second antenna group receives a third signal, wherein the second antenna group is an antenna group on the antenna array except the first antenna group; determining, from 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, the first passive intermodulation signal being excited by the first signal.

Description

Method and device for detecting passive intermodulation signal

Technical Field

The embodiment of the application relates to the technical field of wireless communication, in particular to a method and a device for detecting a passive intermodulation signal.

Background

A non-linear interference source is an important factor for limiting the capacity of a communication system, and typical non-linear interference includes passive inter-modulation (PIM) interference and the like. The passive intermodulation in the wireless communication system refers to an intermodulation effect caused by working under the condition of high-power signals of a plurality of frequencies when passive devices such as joints, feeders, antennas, filters and the like have abnormal conditions such as poor contact, oxidation or rusting and the like. Passive intermodulation generates passive intermodulation signals (PIM 3, PIM5, etc.), and passive devices that generate passive intermodulation sources are referred to as passive intermodulation sources. With the increase of the number of antennas and frequencies, the problem of passive intermodulation interference becomes more serious, and how to quickly and effectively determine the position of a passive intermodulation source is important.

In order to locate the passive intermodulation source, an external device can be used for scanning a device which possibly has a PIM source through sound waves or ultrasonic waves, when the sound waves encounter the PIM source, the amplitude of the PIM signal changes periodically along with the frequency of the sound waves, so that whether the sound waves scan the PIM source can be judged by analyzing whether the amplitude of the PIM signal is modulated by the sound waves, and the possible position of the PIM source is given.

However, the passive intermodulation source for positioning the sound wave needs an external device, which is high in cost, and for a specific PIM source, only the sound wave with a specific frequency can modulate the amplitude of the PIM signal, so that the sound wave frequency needs to be tested, or the frequency of the sound wave needs to be traversed within a certain range, which is low in efficiency.

Disclosure of Invention

The embodiment of the application provides a method and a device for detecting a passive intermodulation signal, which are used for increasing the detection speed of the passive intermodulation signal so as to increase the positioning speed of a passive intermodulation source.

A first aspect of the present application provides a method for detecting a passive intermodulation signal, which may be performed by a device for detecting a passive intermodulation signal, specifically, a multi-antenna network device, or may be performed by a processor, a chip, or a chip system, or may be implemented by a logic module or software that can implement all or part of a communication function, a control function, and a calculation function. Illustratively, the method is performed by a multi-antenna passive intermodulation signal detection apparatus, the method comprising:

transmitting a first signal through a first antenna group in an antenna array, wherein the antenna array comprises at least two antenna groups, and the first antenna group is one of the at least two antenna groups; acquiring first receiving power and second receiving power, wherein the first receiving power is the receiving power of a second signal received by a first antenna group, the second receiving power is the receiving power of a third signal received by a second antenna group, the second antenna group is an antenna group except the first antenna group in at least two antenna groups, and the receiving time periods corresponding to the second signal and the third signal are the same; determining, from the first receive power and the second receive power, that the second signal includes a first passive intermodulation signal corresponding to the first antenna group, the first passive intermodulation signal being excited by the first signal.

The first signal comprises at least two carriers with different frequencies, and is used for exciting a passive intermodulation signal. Each antenna group includes at least one receive antenna and at least one transmit antenna. In the case where the antenna group includes one receiving antenna, the first receiving power is a receiving power corresponding to a receiving antenna in the first antenna group, and the second receiving power is a receiving power corresponding to a receiving antenna in the second antenna group. In the case where the antenna group includes at least two receiving antennas, the first receiving power and the second receiving power may be calculated in any one of three ways:

the first method is as follows: the first receiving power is an average value of receiving power corresponding to at least two first receiving antennas, and the second receiving power is an average value of receiving power corresponding to at least two second receiving antennas.

The second method comprises the following steps: 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. The second method is suitable for the case where the number of the first receiving antennas is equal to the number of the second receiving antennas.

The third method comprises the following steps: the first receiving power is the maximum value of the receiving powers corresponding to the at least two first receiving antennas, and the second receiving power is the maximum value of the receiving powers corresponding to the at least two second receiving antennas.

It can be seen that the antenna array is divided into a plurality of antenna groups, and a passive intermodulation signal is generated by determining one antenna group as a first antenna group and activating the first antenna group to transmit a first signal, so as to activate a possible passive intermodulation source in the first antenna group. And acquiring first receiving power of the first antenna group for receiving the second signal and second receiving power of the second antenna group for receiving the third signal, and knowing whether the second signal received by the first antenna group comprises the passive intermodulation signal or not through the first receiving power and the second receiving power, so that whether the passive intermodulation source exists in the first antenna group or not can be determined. According to the method and the device, detection is not needed by means of external equipment, whether the first activated antenna group generates the passive intermodulation signal or not can be detected by activating the antenna group once, and the positioning speed of the passive intermodulation source can be improved.

In one possible implementation, determining that the second signal includes the first passive intermodulation signal corresponding to the first antenna group according to the first receive power and the second receive power includes: when the first received power is greater than the second received power, it is determined that the second signal comprises a first passive intermodulation signal.

It can be seen that, the first receiving power is greater than the second receiving power, which indicates 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 indicates that the passive intermodulation source in the first antenna group is excited to generate the passive intermodulation signal, thereby causing the signal strength of the second signal to be greater than the signal strength of the third signal.

In one possible implementation, determining that the second signal includes the first passive intermodulation signal corresponding to the first antenna group according to the first receive power and the second receive power includes: acquiring a first target power and a second target power, wherein the first target power is a power corresponding to a first antenna group set, the second target power is a power corresponding to a second antenna group set, the first antenna group set comprises antenna groups except the first antenna group in the antenna array, and the second antenna group set comprises antenna groups except the second antenna group in the antenna array; determining, from the first receive power, the first target power, the second receive power, and the second target power, that the second signal comprises a first passive intermodulation signal.

In one possible implementation, determining that the second signal includes the first passive intermodulation signal according to the first receive power, the first target power, the second receive power, and the second target power includes: acquiring a first target value according to the first received power and the first target power; acquiring a second target value according to the second receiving 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 comprises a first passive intermodulation signal.

In one possible implementation, the first set of antenna groups includes antenna groups that are located adjacent to the first antenna group in the antenna array, and the second set of antenna groups includes antenna groups that are located adjacent to the second antenna group in the antenna array. When there are multiple second antenna groups, each second antenna group has a corresponding second set of antenna groups, including other second antenna groups in addition to the second antenna group, or the second set of antenna groups also includes the first antenna group.

In one possible implementation, the first set of antenna groups includes all antenna groups on the antenna array except the first antenna group, and the second set of antenna groups includes all antenna groups on the antenna array except the second antenna group.

Wherein the first target value may be a ratio between the first received power and the first target power. Wherein, the first receiving power is dividend, and the first target power is divisor; the second target value is a ratio between a second received power and a second target power, wherein the second received power is a dividend and the second target power is a divisor. In some other embodiments, the first target value may also be a difference between the first received power and a first target power, wherein the first received power is a decremented number and the first target power is a decremented number; the second target value is a difference between a second received power and a second target power, wherein the second received power is a decremented number and the second target power is a decremented number.

It can be seen that, the first target value is greater than the second target value, which indicates 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, so that it can be determined that the second signal includes the first passive intermodulation signal, and it can be determined that the passive intermodulation source exists in the area where the first antenna group is located.

In one possible implementation, after determining that the second signal includes a first passive intermodulation signal corresponding to the first antenna group, the method further includes: transmitting a fourth signal through a first sub-antenna group, wherein the first sub-antenna group is one of at least two sub-antenna groups; acquiring third receiving power and fourth receiving power, wherein the third receiving power is the receiving power of a fifth signal received by the first sub-antenna group, the fourth receiving power is the receiving power of a sixth signal received by the second sub-antenna group, the second sub-antenna group is a sub-antenna group except the first sub-antenna group in at least two sub-antenna groups, and the receiving time periods corresponding to the fifth signal and the sixth signal are the same; determining, from the third received power and the fourth received power, that the fifth signal comprises a second passive intermodulation signal corresponding to the first antenna group, the second passive intermodulation signal being excited by the fourth signal.

Therefore, under the condition that the first antenna group comprises a plurality of antennas, after the first antenna group is determined to comprise the passive intermodulation source, the antenna sub-group in the first antenna group is further detected, so that the passive intermodulation source is more accurately positioned, and the positioning accuracy of the passive intermodulation source can be ensured. In addition, under the condition that the passive intermodulation source does not exist in the first antenna group, each sub-antenna group in the first antenna group does not need to be detected, and the positioning speed of the passive intermodulation source can be improved.

In one possible implementation, determining that the fifth signal includes the second passive intermodulation signal corresponding to the first antenna group according to the third received power and the fourth received power includes: when the third receive power is greater than the fourth receive power, it is determined that the fifth signal comprises a second passive intermodulation signal.

In one possible implementation, determining that the fifth signal includes the second passive intermodulation signal corresponding to the first antenna group according to the third received power and the fourth received power includes: acquiring a third target power and a fourth target power, wherein the third target power is a power corresponding to the first antenna group set, the fourth target power is a power corresponding to the second antenna group set, the first antenna group set comprises antenna groups except the first antenna group in the first antenna group, and the second antenna group set comprises antenna groups except the second antenna group in the first antenna group; determining that the fifth signal comprises the second passive intermodulation signal according to the third receive power, the third target power, the fourth receive power, and the fourth target power.

In one possible implementation, determining that the fifth signal includes the second passive intermodulation signal according to the third receive power, the third target power, the fourth receive power, and the fourth target power includes: acquiring a third target value according to the third received power and the third target power; acquiring 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 comprises a second passive intermodulation signal.

In one possible implementation, the first antenna group set includes a sub-antenna group adjacent to the first antenna group in position, and the second antenna group set includes a sub-antenna group adjacent to the second antenna group in position in the first antenna group.

A second aspect of the present application provides an apparatus for detecting a passive intermodulation signal, the apparatus comprising: the antenna array comprises at least two antenna groups, wherein the first antenna group is one of the at least two antenna groups; the antenna comprises an acquisition module, a receiving module and a processing module, wherein the acquisition module is used for acquiring first receiving power and second receiving power, the first receiving power is the receiving power of a second signal received by a first antenna group, the second receiving power is the receiving power of a third signal received by a second antenna group, the second antenna group is an antenna group except the first antenna group in at least two antenna groups, and the receiving time periods corresponding to the second signal and the third signal are the same; a determining module, configured to 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, the first passive intermodulation signal being excited by the first signal.

In a possible implementation, the determining 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.

In a possible implementation manner, the obtaining module is further configured to obtain a first target power and a second target power, where the first target power is a power corresponding to a first antenna group set, the second target power is a power corresponding to a 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 determining module is specifically configured to determine that the second signal comprises the first passive intermodulation signal according to the first received power, the first target power, the second received power, and the second target power.

In a possible implementation manner, the obtaining module is further configured to obtain a first target value according to the first received power and the first target power; the obtaining module is further used for obtaining a second target value according to the second receiving power and the second target power; the determining module is specifically configured to determine that the second signal comprises the first passive intermodulation signal when the first target value is greater than the second target value.

In one possible implementation, the first set of antenna groups includes antenna groups that are located adjacent to the first antenna group in the antenna array, and the second set of antenna groups includes antenna groups that are located adjacent to the second antenna group in the antenna array.

In one possible implementation, the first antenna group includes at least two sub-antenna groups: the control module is further used for controlling 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 obtaining module is further configured to obtain a third receiving power and a fourth receiving power, where the third receiving power is a receiving power of a fifth signal received by the first antenna group, the fourth receiving power is a receiving power of a sixth signal received by the second antenna group, the second antenna group is a sub-antenna group of the at least two sub-antenna groups except the first antenna group, and receiving time periods corresponding to the fifth signal and the sixth signal are the same; the determining module is further configured to 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 antenna group, the second passive intermodulation signal being excited by the fourth signal.

In a possible implementation, the determining 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.

In a possible implementation manner, the obtaining module is further configured to obtain a third target power and a fourth target power, where the third target power is a power corresponding to the first antenna group set, the fourth target power is a power corresponding to the second antenna group set, the first antenna group set includes antenna groups in the first antenna group except the first antenna group, and the second antenna group set includes antenna groups in the first antenna group except the second antenna group; the determining module is specifically configured to determine that the fifth signal includes the second passive intermodulation signal according to the third receive power, the third target power, the fourth receive power, and the fourth target power.

In a possible implementation manner, the obtaining module is further configured to obtain a third target value according to the third received power and the third target power; the obtaining module is further configured to obtain a fourth target value according to the fourth received power and the fourth target power; the determining module is further configured to determine that the fifth signal comprises the second passive intermodulation signal when the third target value is greater than the fourth target value.

The third aspect of the present application further provides an apparatus for detecting a passive intermodulation signal, the apparatus comprising: a processor coupled to a memory for storing a program or instructions which, when executed by the processor, cause the apparatus for detecting a passive intermodulation signal to perform the method of the first aspect or any one of the possible implementations of the first aspect.

The fourth aspect of the present application further provides a computer-readable storage medium having stored thereon instructions, which, when executed on a computer, cause the computer to perform the method according to the first aspect or any one of the possible implementation manners of the first aspect.

The fifth aspect of the present application further provides a chip system, which includes at least one processor and an interface, where the interface is configured to receive data and/or signals, and the at least one processor is configured to perform the method according to the first aspect or any one of the possible implementation manners of the first aspect.

Drawings

Fig. 1 is a schematic structural diagram of a communication system provided in the present application;

fig. 2A is a schematic structural diagram of an embodiment of a network device used in an embodiment of the present application;

fig. 2B is a schematic structural diagram of another embodiment of a network device used in the embodiment of the present application;

fig. 3 is a schematic flowchart of an embodiment of a method for detecting a passive intermodulation signal provided by the present application;

fig. 4 is a schematic structural diagram of an embodiment of an antenna provided in the present application;

fig. 5a is a schematic diagram of a grouping manner of an antenna array provided in the present application;

fig. 5b is a schematic diagram of another grouping manner of an antenna array provided in the present application;

fig. 5c is a schematic diagram of another grouping manner of an antenna array provided by the present application;

fig. 5d is a schematic diagram of another grouping manner of an antenna array provided in the present application;

fig. 6a is a schematic structural diagram of an embodiment of a transmitting antenna provided in the present application;

fig. 6b is a schematic structural diagram of an embodiment of a receiving antenna provided in the present application;

fig. 7a is a schematic diagram of a grouping manner of an antenna array provided by the present application;

fig. 7b is a schematic diagram of another grouping manner of an antenna array provided in the present application;

fig. 7c is a schematic diagram of another grouping manner of an antenna array provided by the present application;

fig. 7d is a schematic diagram of another grouping manner of an antenna array provided in the present application;

fig. 7e is a schematic diagram of another grouping manner of an antenna array provided in the present application;

fig. 8 is a schematic diagram of a matrix corresponding to an antenna array provided in the present application;

fig. 9 is a schematic flow chart diagram illustrating an embodiment of determining that the second signal includes the first passive intermodulation signal provided herein;

fig. 10 is a schematic flow chart diagram illustrating another embodiment of a method for detecting a passive intermodulation signal provided herein;

fig. 11 is a schematic structural diagram of an embodiment of a device for detecting a passive intermodulation signal provided by the present application;

fig. 12 is a schematic structural diagram of another embodiment of a device for detecting a passive intermodulation signal provided in the present application.

Detailed Description

The embodiment of the application provides a method and a device for detecting a passive intermodulation signal, which are used for improving the detection speed of the passive intermodulation signal so as to improve the positioning speed of a passive intermodulation source.

The technical solution of the embodiment of the present application may be applied to various communication systems, such as a Long Term Evolution (LTE) system, a LTE Frequency Division Duplex (FDD) system, a LTE Time Division Duplex (TDD) system, a Universal Mobile Telecommunications System (UMTS), a global system for mobile communications (GSM), a fifth generation (5 th generation,5 g) mobile communication system or a New Radio (NR) system, or a future communication system, and the like.

Fig. 1 is a schematic structural diagram of a communication system provided in the present application, where the communication system includes a network device and at least one terminal device (such as terminals 1 to 6 shown in fig. 1). The network device may communicate with at least one terminal device, such as terminal 1, via an Uplink (UL) and a Downlink (DL). The uplink refers to a physical layer communication link from the terminal equipment to the network equipment, and the downlink refers to a physical layer communication link from the network equipment to the terminal equipment.

In this embodiment, the network device has multiple transmitting antennas and multiple receiving antennas, and may communicate with at least one terminal device by using a multiple-input multiple-output (MIMO) technique. The antenna array is formed by arranging a plurality of transmitting antennas and a plurality of receiving antennas according to a certain rule. The plurality of transmitting antennas and the plurality of receiving antennas on the antenna array are arranged in a linear arrangement mode to form a linear array. The plurality of transmitting antennas and the plurality of receiving antennas on the antenna array are arranged in a plane, so that the antenna array is a planar array. In the embodiment of the present application, the antenna array may be a linear array or a planar array. The present application is not limited thereto.

In the embodiment of the present application, the non-ideal factor for generating the passive intermodulation signal is referred to as a PIM source. The PIM source may also be referred to as a non-linear source, since passive intermodulation interference is typically caused by non-linear characteristics of various passive devices (e.g., duplexers, antennas, feed lines, rf line connectors, etc.) in the transmit path.

It should be understood that a plurality of network devices may also exist in the communication system, and one network device may provide services for a plurality of terminal devices. The network device in fig. 1 and each of a part of terminal devices or all of the terminal devices in at least one terminal device may implement the technical solution provided by the embodiment of the present application. In addition, the various terminal devices shown in fig. 1 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.

The scheme provided by the application is generally applied to network equipment in a wireless communication system.

The network device, also called an access network device, mentioned in the embodiments of the present application is a device in a network for accessing a terminal device to a wireless network. The network device may be a node in a radio access network, which may also be referred to as a base station, which may also be referred to as 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 also be a next generation base station (next generation NodeB) in a 5G NR system, or may also be a Node B (Node B, NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a Transmission Reception Point (TRP), a home NodeB (e.g., home NodeB, or home B, HNB), a Base Band Unit (BBU), a WiFi Access Point (AP), a relay Node, an integrated access and background integrated (IAB ) Node or a base station in a future mobile communication system, or may also be a centralized unit (unit, CU), or a distributed unit (unit, CU), and the like. In a scenario of separate deployment of an access network device including a CU and a DU, the CU supports Radio Resource Control (RRC), packet Data Convergence Protocol (PDCP), service Data Adaptation Protocol (SDAP), and other protocols; the DU mainly supports a Radio Link Control (RLC) layer protocol, a Medium Access Control (MAC) layer protocol, and a physical layer protocol.

Fig. 2A is a schematic structural diagram of an embodiment of a network device used in an embodiment of the present application; fig. 2B is a schematic structural diagram of another implementation of a network device used in this embodiment of the present application. Illustratively, as shown in fig. 2A, the network device may include a BBU, and a Remote Radio Unit (RRU) and an antenna (antenna) connected to the BBU, where the BBU is mainly responsible for baseband algorithm-related calculations, and the BBU interacts with the RRU through an interface, and the RRU is connected to the antenna through a feeder. BBU interacts with RRU, such as specifically through the Common Public Radio Interface (CPRI) or Open Base Station Architecture (OBSAI). It should be understood that fig. 2A is described by taking one BBU connected to one RRU as an example, and it should be understood that in practical applications, one BBU may be connected to one or more RRUs, and further BBUs and RRUs connected thereto may be included in the network device, which is not limited in this application.

Exemplarily, as shown in fig. 2B, the network device may include a BBU and an active antenna processing unit (AAU) connected to the BBU, where the BBU is mainly responsible for baseband algorithm-related calculations, and the BBU interacts with the AAU through an interface. BBUs interact with AAUs, particularly, for example, through CPRI or OBSAI. It should be understood that fig. 2B is described by way of example with one BBU connected to one AAU, and it should be understood that in practical applications, one BBU may be connected to one or more AAUs, and that more BBUs and AAUs connected thereto may be included in the network device, and the application is not limited thereto.

The terminal device mentioned in the embodiment of the application is a device with a wireless transceiving function, and can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; can also be deployed on the water surface (such as a ship and the like); the terminal device may be a mobile phone, a tablet computer, a computer with a wireless transceiving 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 security, a wireless terminal in a smart city, a wireless terminal in a smart home, and the like.

The carrier wave (which may also be referred to as a carrier frequency) in the embodiments of the present application refers to a radio wave having a specific frequency and a certain bandwidth (e.g., 10M) for carrying a wireless signal to be transmitted. The frequency band refers to a part of spectrum resources used in wireless communication, for example, an 1800M frequency band used in an LTE system. Generally, a frequency band includes a plurality of carriers, for example, a 1800M frequency band has a bandwidth of 75M, and the frequency band may include M (M ≧ 1) carriers with a bandwidth of 20M and n (n ≧ 1) carriers with a bandwidth of 10M, and of course, other possible carrier division manners are also available, which is not limited in this application. In this application, one receive antenna, or transmit antenna, may process a signal containing at least one carrier.

As shown in fig. 3, fig. 3 is a schematic flowchart of an embodiment of a method for detecting a passive intermodulation signal provided by the present application. The present embodiment comprises the following steps:

s101: a first signal is transmitted over a first antenna group in an antenna array.

The antenna array comprises 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 transmit antenna and at least one receive antenna. The transmitting antenna is used for transmitting a first signal. The receiving antenna is used for receiving a passive intermodulation signal generated by the passive intermodulation source excited by the first signal when the passive intermodulation source exists 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 may be a random signal, that is, the first signal does not need to be precoded, so that the complexity of the first signal is reduced, and the detection efficiency of the passive intermodulation signal is improved.

The transmitting antenna in the same antenna group is adjacent to at least one receiving antenna in the antenna array, and one receiving antenna is adjacent to at least one transmitting antenna in the antenna array. At least one transmitting antenna and at least one receiving antenna in the same antenna group jointly form part of an antenna array.

The antenna arrays may be divided into 2, 3, 4, 8, 16, or 32 groups, etc. The number of antenna groups in the antenna array may 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 antenna and transmitting antenna), and this application is not limited thereto.

The antennas in the antenna array may be a common transmitting/receiving antenna, a transmitting/receiving separate antenna, or the like. The common receiving and transmitting antenna, namely the receiving antenna and the transmitting antenna, are the same antenna, and the receiving and transmitting separated antenna, namely the receiving antenna and the transmitting antenna, are two antennas respectively. In the following, the grouping of antenna arrays in the form of co-transmitting antennas and antenna arrays in the form of transmitting and receiving separate antennas is illustrated.

As for the antenna array of the common transmit/receive antenna, as shown in fig. 4, fig. 4 is a schematic structural diagram of an embodiment of the antenna provided in the present application. In fig. 4, the antenna is a 1-drive 6 antenna, that is, one common transceiving antenna includes 6 antenna elements. Fig. 4 shows from left to back a dual polarized antenna (comprising two polarized co-transmit antennas, i.e. two co-transmit antennas), +45 ° polarized co-transmit antenna and-45 ° polarized co-transmit antenna, respectively. As shown in fig. 5a to 5d, fig. 5a is a schematic diagram illustrating a grouping manner of an antenna array provided in the present application; fig. 5b is a schematic diagram of another grouping manner of an antenna array provided by the present application; fig. 5c is a schematic diagram of another grouping manner of an antenna array provided by the present application; fig. 5d is a schematic diagram of another grouping manner of an antenna array provided in the present application. The antenna arrays in fig. 5a to 5d are antenna arrays formed by 32 common transceiving antennas, and two common transceiving antennas with different polarization directions are located at the same position. In fig. 5a, the dashed boxes indicate the co-transmitting/receiving antennas with only one polarization direction in the selected area, and the solid boxes indicate the dual-polarized co-transmitting/receiving antennas in the selected area, that is, the two polarized co-transmitting/receiving antennas are all grouped into the same group. Fig. 5a shows that each group includes one common transceiving antenna, i.e. 1 transmitting antenna and 1 receiving antenna, and the antenna array is divided into 32 groups of antennas; fig. 5b shows that each group includes 2 common transceiving antennas, i.e. 2 transmitting antennas and 2 receiving antennas, and the antenna array is divided into 16 groups of antennas; fig. 5c shows that each group includes 4 common transceiving antennas, i.e. 4 transmitting antennas and 4 receiving antennas, and the antenna array is divided into 8 groups of antennas; fig. 5d shows that each group includes 8 common transceiving antennas, i.e. 8 transmitting antennas and 8 receiving antennas, and the antenna array is divided into 4 groups of antennas. Of course, the number of the common transceiving antennas in different antenna groups on the same antenna array may also be different, and the application is not limited thereto.

As for the transmit-receive separation antenna, as shown in fig. 6a and fig. 6b, fig. 6a is a schematic structural diagram of an embodiment of the transmit antenna provided in the present application; fig. 6b is a schematic structural diagram of an embodiment of a receiving antenna provided in the present application. The antennas in fig. 6a and fig. 6b are 1-by-4 antennas, that is, 4 antenna elements are included in 1 receiving antenna or one transmitting antenna. In fig. 6a, from left to back are respectively a dual polarized transmitting antenna (an antenna comprising two polarization directions, i.e. two transmitting antennas), +45 ° polarized transmitting antenna and-45 ° polarized transmitting antenna; in fig. 6b, from left to back are a dual polarized receive antenna (an antenna comprising two polarization directions, i.e. two receive antennas), +45 ° polarized receive antenna and-45 ° polarized receive antenna, respectively. As shown in fig. 7a to 7e, fig. 7a is a schematic diagram illustrating a grouping manner of an antenna array provided in the present application; fig. 7b is a schematic diagram of another grouping manner of an antenna array provided in the present application; fig. 7c is a schematic diagram of another grouping manner of an antenna array provided by the present application; fig. 7d is a schematic diagram of another grouping manner of an antenna array provided in the present application; fig. 7e is a schematic diagram of another grouping manner of the antenna array provided in the present application. The antenna arrays in fig. 7a to 7e are 32 transmit antennas and 32 receive antenna arrays, respectively, and there are two receive antennas or transmit antennas with different polarization directions at the same position. In a grouping scene of separate transceiving, because the transmitting antenna and the receiving antenna appear at intervals, the group of receiving antennas and the adjacent transmitting antennas at two sides of the group of receiving antennas can be grouped into the same group by taking the receiving antenna as a reference; the group of transmitting antennas and the adjacent receiving antennas on both sides of the group can also be divided into the same group by taking the transmitting antenna as a reference. The former is taken as an example in the present embodiment. The dashed boxes in fig. 7a represent antennas with only one polarization direction in the selected area, and the solid boxes represent dual polarized antennas in the selected area, i.e. both polarized antennas are grouped into the same group. Fig. 7a shows that each group comprises 2 transmit antennas and 1 receive antenna, and the antenna array is divided into 32 groups of antennas; FIG. 7b shows that each group comprises 4 transmit antennas and 2 receive antennas, for a total of 16 antenna groups; fig. 7c shows that each group comprises 6 transmit antennas and 4 receive antennas, and the antenna array is divided into 8 groups of antennas; fig. 7d shows that each group comprises 8 transmit antennas and 6 receive antennas, and the antenna array is divided into 6 groups of antennas; fig. 7e shows that each group comprises 10 transmit antennas and 8 receive antennas, and the antenna array is divided into 4 groups of antennas. In the grouping of antenna arrays for transceiving separate antennas, the number of transmit antennas and receive antennas in each group of antennas is different, and 1 transmit antenna may be divided into two groups of antennas. Of course, the number of transmit antennas and receive antennas in each group of antennas may be the same. The present application is not limited thereto.

For separate transmit and receive antenna arrays, where the number of transmit and receive antennas in each group is different, the total number of antennas may be different between different antenna groups. For example, in fig. 7d, the antenna group at the right edge of the other non-antenna array includes 8 transmit antennas and 6 receive antennas, and the antenna group R at the right edge of the antenna array includes only 4 transmit antennas and 4 receive antennas. The right edge is relative to the arrangement of the antenna array in fig. 7d, and is not meant to limit the present application.

The grouping of the antenna arrays may be preset or may be 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 positions of the corresponding antennas on the antenna array to form a matrix. The preset rules are, for example, a selection window of a preset size and a preset step size. As shown in fig. 8, fig. 8 is a schematic diagram of a matrix corresponding to an antenna array provided in the present application, for example, the preset size of the selection window is 1*2, and the step size is 2, that is, 2 antennas are selected each time as 1 group, and the antennas in each antenna group do not coincide. The antenna array in fig. 8 is divided into 8 groups according to a preset rule: two antennas numbered 00 and 01 are in one group, antennas numbered 02 and 03 are in one group … … and two antennas numbered 12 and 13 are in one group, and two antennas numbered 14 and 15 are in one group. Of course, fig. 8 is only an example, and the number and arrangement of antennas in the antenna array, the size of the selection window, and the step size are adjusted according to practical situations, and are not limited to the present application.

In the embodiment of the application, only the transmitting antenna in one group of antenna groups in the antenna array is excited to transmit the first signal each time, so that interference caused by the work of other antenna groups is reduced, and the detection precision of the passive intermodulation signal is improved.

S102: a first received power and a second received power are obtained.

The first receiving power is a receiving power of a second signal received by the first antenna group, and the second receiving power is a receiving power of a third signal received by the second antenna group. The second antenna group is an antenna group of at least two antenna groups of the antenna array other than the first antenna group. 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 a transmitting time period for transmitting the first signal, and the receiving time period may also be a time period after transmitting the first signal. The present application is not limited thereto.

The second signal is specifically a signal received by a first receiving antenna in the first antenna group in a receiving time period, and the third signal is specifically a signal received by a second receiving antenna in the second antenna group in the receiving time period. When the passive intermodulation source exists in the first antenna group, the passive intermodulation source is excited by the first signal to generate a first passive intermodulation signal, and then the first passive intermodulation signal is included in the second 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 set is closer to the receiving antenna in the first antenna set, the signal strength of the first passive intermodulation signal received by the first antenna set is greater than the signal strength of the first passive intermodulation signal received by the second antenna set, 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 received power of the receiving antenna when receiving the signal.

In this embodiment, when the number of the first receiving antennas in the first antenna group is only one, and the number of the second receiving antennas in the second antenna group is also only one, the first receiving power is a receiving power corresponding to the first receiving antenna receiving the second signal, and the second receiving power is a receiving power corresponding to the second receiving antenna receiving the third signal.

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 by any one of the following three methods:

the first method is as follows: the first receiving power is an average value of receiving powers corresponding to at least two first receiving antennas, and the second receiving power is an average value of receiving powers corresponding to at least two second receiving antennas.

The third method comprises the following steps: the first receiving power is the maximum value of the receiving power corresponding to the at least two first receiving antennas, and the second receiving power is the maximum value of the receiving power corresponding to the at least two second receiving antennas.

S103: determining, from 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.

There are various ways of determining that the second signal comprises the first passive intermodulation signal:

the method I comprises the following steps:

and when the maximum value of the received power corresponding to all antenna groups on the antenna array is the first received power, determining that the second signal comprises the first passive intermodulation signal.

And comparing the first receiving power with the second receiving power, and determining that the second signal comprises the first passive intermodulation signal when the first receiving power is greater than the second receiving power. The receiving power is positively correlated with the signal strength of the received signal, so that the first receiving power is greater than the second receiving power, which indicates that the signal strength of the second signal is greater than the signal strength of the third signal, and it can be indicated that the second signal includes the first passive intermodulation signal, and it can be determined that a passive intermodulation source exists in an area where the first antenna group is located on the antenna array.

Specifically, the first received power may be compared with the second received power corresponding to each second antenna group, 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. Thus, the accuracy of the detection of the passive intermodulation signal can be improved.

Of course, the first receiving power and the second receiving power corresponding to the adjacent second antenna group may also be compared, and when the first receiving power is greater than the second receiving 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 which is adjacent to the first antenna group in position on the antenna array, so that the comparison times can be reduced, the time for comparing the first receiving power and the second receiving power can be reduced, and the efficiency of detecting the passive intermodulation signals can be improved.

When the maximum value of the received power 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 the passive intermodulation source.

The second method comprises the following steps:

the method is suitable for the case that the number of the antenna groups in the antenna array is larger than 2, namely the second antenna group is at least two.

Fig. 9 is a flowchart illustrating an embodiment of determining that the second signal includes the first passive intermodulation signal, as shown in fig. 9. The method comprises the following steps:

s1031: and acquiring a first target power and a second target power.

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

Optionally, the first antenna group set is a set of antenna groups adjacent to the first antenna group in position on the antenna array, and the second antenna group set is a set of antenna groups adjacent to the second antenna group in 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 is not limited in this regard.

By way of example in fig. 5c, the antenna array in fig. 5c comprises 8 antenna groups from 1 to 8. When antenna group 1 is a first antenna group, antenna groups 2-8 are a second antenna group. Then, antenna group 2, antenna group 5 and antenna group 6 are adjacent to antenna group 1 in the antenna array, and the first antenna group set includes antenna group 2, antenna group 5 and antenna group 6. Adjacent to the antenna group 2, there are antenna group 1, antenna group 3, antenna group 5, antenna group 6 and antenna group 7, and the second antenna group a comprises antenna group 1, antenna group 3, antenna group 5, antenna group 6 and antenna group 7. The antenna groups adjacent to the antenna group 3 include 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 the antenna group 4 includes the antenna group 3, the antenna group 7 and the antenna group 8, the second antenna group set D corresponding to the antenna group 5 includes the antenna group 1, the antenna group 2 and the antenna group 6, the second antenna group E corresponding to the antenna group 6 includes the antenna groups 1 to 3, the antenna group 5 and the antenna group 7, the second antenna group F corresponding to the antenna group 7 includes the antenna groups 2 to 4, the antenna group 6 and the antenna group 8, and the second antenna group G corresponding to the antenna group 8 includes the antenna group 3, the antenna group 4 and the antenna group 7.

In some other embodiments, the adjacent antenna groups may not include diagonally positioned antenna groups. For example, the first set of antenna groups includes antenna group 2 and antenna group 5, but not antenna group 6 in a diagonal position; the second set of antenna groups a comprises antenna group 1, antenna group 3 and antenna group 6, but not antenna group 5 and antenna group 7. The present application is not limited thereto.

The first target power may be an average of received powers of all antenna groups in the first antenna group set, and the second target power may be an average of received powers of all antenna groups in the second antenna group set. In some other embodiments, the first target power may be a maximum of the received powers of all antenna groups in the first set of antenna groups, and the second target power may be a maximum of the received powers of all antenna groups in the second set of antenna groups. The present application is not limited thereto.

S1032: determining, from the first receive power, the first target power, the second receive power, and the second target power, that the second signal comprises a first passive intermodulation signal.

Specifically, a first target value is obtained from the first received power and the first target power. And acquiring 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 comprises a first passive intermodulation signal.

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

In some other embodiments, the first target value may also be a difference between the first received power and a first target power, wherein the first received power is a decremented number and the first target power is a decremented number; the second target value is a difference between a second received power and a second target power, wherein the second received power is a decremented number and the second target power is a decremented number.

The first target value is larger than the second target value, which indicates that the first receiving power is significantly larger than the receiving power of the adjacent antenna group, so that the first passive intermodulation signal can be determined to be included in the second signal, and the passive intermodulation source can be determined to exist in the area where the first antenna group is located.

When the first target is less than or equal to the second target value, indicating 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, it may be determined that the area where the first antenna group is located does not include the passive intermodulation source.

In the embodiment of the application, the antenna array is divided into a plurality of antenna groups, one of the antenna groups is determined to be a first antenna group, the first antenna group is activated to transmit a first signal, a passive intermodulation source possibly existing in the first antenna group is activated to generate a passive intermodulation signal, first receiving power in a process that the first antenna group receives a second signal and second receiving power in a process that the second antenna group receives a third signal are obtained, whether the passive intermodulation signal is included in a second signal received by the first antenna group can be known through the first receiving power and the second receiving power, and whether the passive intermodulation source exists in the first antenna group can be determined. According to the method and the device, detection is not needed by means of external equipment, detection cost is reduced, whether the activated first antenna group generates the passive intermodulation signal or not can be detected by activating one antenna group each time, whether the passive intermodulation source exists in the first antenna group or not can be determined, and the positioning speed of the passive intermodulation source can be improved.

Further, traversing each antenna group in the antenna array, and performing operations S101 to S103 with each antenna group as a first antenna group, respectively, to detect whether there is a passive intermodulation source in the area where the antenna group is located.

When the number of antenna groups divided by the antenna array is small and the number of antennas in the antenna groups is large, the detection speed of the passive intermodulation source can be improved, but the detection precision is lost; the antenna groups divided by the antenna array are more, the number of antennas in the antenna groups is less, the detection precision of the passive intermodulation source can be improved, but the detection times can be increased, and further the detection efficiency is reduced. In order to achieve the detection speed and the detection accuracy of the passive intermodulation source on the antenna array, as shown in fig. 10, fig. 10 is a schematic flowchart of another embodiment of the detection method for providing the passive intermodulation signal according to the present application. Different from the previous embodiment, in this embodiment, after determining that the second signal includes the passive intermodulation signal, that is, determining that the first antenna group includes the passive intermodulation source, the detection is further performed on the antenna group in the first antenna group. The embodiment comprises the following steps:

s201: a first signal is transmitted over a first antenna group in an antenna array.

In this embodiment, the total number of the transmitting antennas and the receiving antennas in the first antenna group is at least 4. For example, the first antenna group may include 2 transmit antennas and 2 receive antennas, or 4 transmit antennas and 4 receive antennas, or 8 receive antennas and 8 transmit antennas, etc. The number of antennas in the first antenna group may be determined according to the total number of antennas on the antenna array, and generally, the greater the number of antennas on the antenna array, the greater the number of antennas in the first antenna group, which is not limited in this application.

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

S202: a first received power and a second received power are obtained.

The step can be referred to as step S102, and thus is not described herein.

S203: determining, from 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.

The step S103 can be referred to in detail, and is not repeated herein.

S204: and transmitting a fourth signal through the first sub-antenna group, wherein the first sub-antenna group is one of the at least two sub-antenna groups.

The fourth signal may be the same as or different from the first signal, which is not limited in this application.

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

S205: and acquiring third receiving power and fourth receiving power.

The third received power is the received power of the fifth signal received by the first sub-antenna group, and 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 except the first sub-antenna group in 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 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, and therefore, the description thereof is omitted.

S206: determining, from the third receive power and the fourth receive power, that the fifth signal comprises a second passive intermodulation signal corresponding to the first antenna group.

The second passive intermodulation signal is excited by the fourth signal.

There are various ways to determine that the fifth signal comprises the second passive intermodulation signal corresponding to the first antenna group:

the first method is as follows:

and when the maximum value of the received powers corresponding to all the antenna groups in the first antenna group is the third received power, determining that the fifth signal comprises the second passive intermodulation signal.

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

Or, when the third received power is greater than a fourth received power corresponding to a second antenna group adjacent to the first antenna group, determining that the fifth signal includes the second passive intermodulation signal.

And when the maximum value of the received powers corresponding to all the antenna groups in the first antenna group is not the third received power, determining that the second passive intermodulation signal is not included in the fifth signal.

The second method comprises the following steps:

and acquiring a third target power and a fourth target power, wherein the third target power is a power corresponding to the first antenna group set, the fourth target power is a power corresponding to the second antenna group set, the first antenna group set is a antenna group in the first antenna group except the first antenna group, and the second antenna group set is a antenna group in the first antenna group except the second antenna group.

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

Wherein the definition of the first set of sub-antenna groups can refer to the first set of antenna groups in S1031, and the definition of the second set of sub-antenna groups can refer to the second set of antenna groups 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, which are not described herein again.

Determining that the fifth signal comprises the second passive intermodulation signal according to the third receive power, the third target power, the fourth receive power, and the fourth target power.

Specifically, a third target value is obtained according to the third received power and the third target power, and a fourth target value is obtained according to the fourth received power and the fourth target power. The third target value may be obtained in S1032 as the first target value, and the fourth target value may be obtained in S1032 as the second target value, which is not described herein again.

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

The third target value is greater than the fourth target value, which indicates that the third received power is significantly greater than the received power of the adjacent antenna sub-group, so that it can be determined that the fifth signal includes the second passive intermodulation signal, and it can be determined that the passive intermodulation source exists in the area where the first antenna sub-group is located.

And when the third target is less than or equal to the fourth target value, determining that the area where the first antenna sub-group is located does not include the passive intermodulation source.

As illustrated in fig. 5d, the antenna array includes P, Q, M and N4 antenna groups, each antenna group including 8 transmit antennas and 8 receive antennas. Each antenna group is further divided into 4 sub-antenna groups, and each sub-antenna group comprises 2 transmitting antennas and 2 receiving antennas (one sub-antenna group is a dual-polarized co-transmitting and receiving antenna at the same position).

Firstly, the operations from S201 to S203 are sequentially performed on P, Q, M and N4 antenna groups, and it is determined that there is a passive intermodulation source in the antenna group P, in this process, the antenna group needs to be excited 4 times to send out a first signal. Then, the operations S204 to S206 are sequentially performed on each antenna group in the antenna group P to determine which sub-antenna group the passive intermodulation source is specifically located in, and in this process, 4 times of excitation of the sub-antenna groups to emit the fifth signal is required. And (4) at most 8 times of excitation operation, namely positioning the passive intermodulation source. In the same antenna array, in the case that each antenna group includes 2 transmitting antennas and 2 receiving antennas, operations S201 to S203 need to be performed 16 times to locate the passive intermodulation source in the antenna array. In the same antenna array, if each antenna group includes 4 transmitting antennas and 4 receiving antennas, the operations from S201 to S203 are performed 8 times, which may result in insufficient positioning accuracy of the passive intermodulation source.

Therefore, based on the method of the embodiment, the positioning accuracy of the passive intermodulation source can be ensured, and the positioning speed of the passive intermodulation source can be improved.

The following describes a passive intermodulation signal detection apparatus according to an embodiment of the present application. As shown in fig. 11, fig. 11 is a schematic structural diagram of an embodiment of a detection apparatus for a passive intermodulation signal provided in the present application. The passive intermodulation signal detection device is used for realizing the steps in the embodiments of the passive intermodulation signal detection method.

In the embodiment of the present application, the apparatus 1100 for detecting a passive intermodulation signal includes a control module 1101, an obtaining module 1102, and a determining module 1103.

Specifically, the control module 1101 is configured to control a first antenna group in an antenna array to transmit a first signal, where the antenna array includes at least two antenna groups, and the first antenna group is one of the at least two antenna groups; an obtaining module 1102, configured to obtain first receiving power and second receiving power, where the first receiving power is receiving power of a second signal received by a first antenna group, the second receiving power is receiving power of a third signal received by a second antenna group, the second antenna group is an antenna group except the first antenna group in at least two antenna groups, and receiving time periods corresponding to the second signal and the third signal are the same; a determining module 1103 configured to 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, where the first passive intermodulation signal is excited by the first signal.

Optionally, the determining module 1103 is specifically configured to determine that the second signal includes the first passive intermodulation signal when the first receiving power is greater than the second receiving power.

Optionally, the obtaining module 1102 is further configured to obtain a first target power and a second target power, where the first target power is a power corresponding to the first antenna group set, the second target power is a 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 determining module 1103 is specifically configured to determine that the second signal includes the first passive intermodulation signal according to the first received power, the first target power, the second received power, and the second target power.

Optionally, the obtaining module 1102 is further configured to obtain a first target value according to the first received power and the first target power; the obtaining module 1102 is further configured to obtain a second target value according to the second received power and the second target power; the determining module 1103 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.

Optionally, the first antenna group set includes an antenna group adjacent to the first antenna group position on the antenna array, and the second antenna group set includes an antenna group adjacent to the second antenna group position on the antenna array.

Optionally, the first antenna group includes at least two sub-antenna groups: the control module 1101 is further configured to control the first antenna group to transmit a fourth signal, where the first antenna group is one of at least two antenna groups; the obtaining module 1102 is further configured to obtain a third receiving power and a fourth receiving power, where the third receiving power is a receiving power of a fifth signal received by the first antenna group, the fourth receiving power is a receiving power of a sixth signal received by the second antenna group, the second antenna group is a sub-antenna group of the at least two sub-antenna groups except the first antenna group, and receiving time periods corresponding to the fifth signal and the sixth signal are the same; determining module 1103 is further configured to 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 antenna group, where the second passive intermodulation signal is excited by the fourth signal.

Optionally, the determining module 1103 is specifically configured to determine that the fifth signal includes the second passive intermodulation signal when the third receiving power is greater than the fourth receiving power.

Optionally, the obtaining module 1102 is further configured to obtain a third target power and a fourth target power, where the third target power is a power corresponding to the first antenna group set, the fourth target power is a power corresponding to the second antenna group set, the first antenna group set includes antenna groups in the first antenna group except the first antenna group, and the second antenna group set includes antenna groups in the first antenna group except the second antenna group; the determining module 1103 is specifically configured to determine 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.

Optionally, the obtaining module 1102 is further configured to obtain a third target value according to the third received power and the third target power; the obtaining module 1102 is further configured to obtain a fourth target value according to the fourth received power and the fourth target power; the determining module 1103 is further configured to determine that the fifth signal comprises the second passive intermodulation signal when the third target value is greater than the fourth target value.

Optionally, the first sub-antenna group set includes a sub-antenna group adjacent to the first sub-antenna group in the first antenna group, and the second sub-antenna group set includes a sub-antenna group adjacent to the second sub-antenna group in the first antenna group.

The passive intermodulation signal detection apparatus 1100 provided in the embodiment of the present application can be understood by referring to the corresponding content in the foregoing passive intermodulation signal detection method, and details are not described here.

Fig. 12 is a schematic structural diagram of another embodiment of a passive intermodulation signal detection apparatus provided in the present application, as shown in fig. 12. The apparatus may be specifically a network device, for example, a base station, configured to implement the functions related to the network device in any of the method embodiments described above.

The network device includes: one or more radio frequency units, such as a Remote Radio Unit (RRU) 1201 and one or more baseband units (BBUs) (which may also be referred to as digital units, DUs) 1202. The RRU1201, which may be referred to as a transceiver unit, transceiver, transceiving circuitry, or transceiver, etc., may include at least one antenna 12011 and a radio unit 12012. The RRU1201 is mainly used for receiving and transmitting radio frequency signals and converting radio frequency signals and baseband signals. The BBU1202 is mainly used for performing baseband processing, controlling a base station, and the like. The RRU1201 and the BBU1202 may be physically disposed together, or may be physically disposed separately, that is, a distributed base station.

The BBU1202 is a control center of a base station, and may also be referred to as a processing unit, and is mainly used for performing baseband processing functions, such as channel coding, multiplexing, modulation, spreading, and the like. For example, the BBU (processing unit) 1202 may be configured to control the base station to perform the operation procedure related to the network device in the above-described method embodiment.

In an example, the BBU1202 may be formed by one or more boards, and the boards may jointly support a radio access network (e.g., an LTE network) with a single access indication, or may respectively support radio access networks (e.g., LTE networks, 5G networks, or other networks) with different access schemes. The BBU1202 may also include a memory 12021 and a processor 12022, the memory 12021 being used to store the necessary instructions and data. The processor 12022 is configured 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 processor 12022 may serve one or more boards. That is, the memory and processor may be provided separately on each board. Multiple boards may share the same memory and processor. In addition, each single board can be provided with necessary circuits.

In another embodiment of the present application, there is also provided a computer-readable storage medium having stored therein computer-executable instructions that, when executed by at least one processor of an apparatus, cause the apparatus to perform the method for detecting a passive intermodulation signal as described in the embodiments of fig. 3, 9 and 10 above.

In another embodiment of the present application, a chip system is further provided, the chip system includes at least one processor and an interface, the interface is configured to receive data and/or signals, and the at least one processor is configured to support implementation of the method for detecting a passive intermodulation signal described in the embodiments of fig. 3, 9 and 10. In one possible design, the system-on-chip may further include a memory, the memory storing program instructions and data necessary for the computer device. The chip system may be formed by a chip, or may include a chip and other discrete devices.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

The foregoing has been provided with specific examples to illustrate the principles and embodiments of the present application, and the above description of the embodiments is only provided to help understand the method and its core ideas of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. A method of detecting a passive intermodulation signal, the method comprising:

transmitting a first signal through a first antenna group in an antenna array, the antenna array comprising at least two antenna groups, the first antenna group being one of the at least two antenna groups;

acquiring first receiving power and second receiving power, wherein the first receiving power is the receiving power of a second signal received by the first antenna group, the second receiving power is the receiving power of a third signal received by the second antenna group, the second antenna group is an antenna group of the at least two antenna groups except the first antenna group, and the receiving time periods corresponding to the second signal and the third signal are the same;

determining, from the first receive power and the second receive power, that the second signal includes a first passive intermodulation signal corresponding to the first antenna group, the first passive intermodulation signal being excited by the first signal.

2. The method of claim 1, wherein the determining that the second signal comprises the first passive intermodulation signal corresponding to the first antenna group according to the first receive power and the second receive power comprises:

determining that the second signal comprises the first passive intermodulation signal when the first receive power is greater than the second receive power.

3. The method of claim 1, wherein the determining that the second signal comprises a first passive intermodulation signal corresponding to the first antenna set from the first receive power and the second receive power comprises:

acquiring a first target power and a second target power, wherein the first target power is a power corresponding to a first antenna group set, the second target power is a power corresponding to a second antenna group set, the first antenna group set comprises antenna groups except the first antenna group in the antenna array, and the second antenna group set comprises antenna groups except the second antenna group in the antenna array;

determining, from the first receive power, the first target power, the second receive power, and the second target power, that the second signal comprises the first passive intermodulation signal.

4. The method of claim 3, wherein the determining that the second signal comprises the first passive intermodulation signal according to the first receive power, the first target power, the second receive power, and the second target power comprises:

acquiring a first target value according to the first receiving power and the first target power;

acquiring a second target value according to the second receiving power and the second target power;

determining that the second signal comprises the first passive intermodulation signal when the first target value is greater than the second target value.

5. The method of claim 3 or 4, wherein the first set of antenna groups comprises antenna groups that are located adjacent to the first set of antenna groups on the antenna array, and wherein the second set of antenna groups comprises antenna groups that are located adjacent to the second set of antenna groups on the antenna array.

6. The method of any of claims 1-5, wherein the first antenna group comprises at least two sub-antenna groups, the method further comprising:

transmitting a fourth signal through a first sub-antenna group, the first sub-antenna group being one of the at least two sub-antenna groups;

obtaining a third receiving power and a fourth receiving power, where the third receiving power is a receiving power of a fifth signal received by the first antenna group, the fourth receiving power is a receiving power of a sixth signal received by the second antenna group, the second antenna group is a sub-antenna group of the at least two sub-antenna groups except the first antenna group, and receiving time periods corresponding to the fifth signal and the sixth signal are the same;

determining, from the third receive power and the fourth receive power, that the fifth signal comprises a second passive intermodulation signal corresponding to the first antenna group, the second passive intermodulation signal being excited by the fourth signal.

7. The method of claim 6, wherein the determining that the fifth signal comprises a second passive intermodulation signal corresponding to the first antenna group according to the third and fourth receive powers comprises:

determining that the fifth signal comprises the second passive intermodulation signal when the third receive power is greater than the fourth receive power.

8. The method of claim 6, wherein the determining that the fifth signal comprises a second passive intermodulation signal corresponding to the first antenna group according to the third and fourth receive powers comprises:

obtaining a third target power and a fourth target power, where the third target power is a power corresponding to a first antenna group set, the fourth target power is a power corresponding to a second antenna group set, the first antenna group set includes antenna groups in the first antenna group except the first antenna group, and the second antenna group set includes antenna groups in the first antenna group except the second antenna group;

9. The method of claim 8, wherein the determining that the fifth signal comprises the second passive intermodulation signal according to the third receive power, the third target power, the fourth receive power, and the fourth target power comprises:

acquiring a third target value according to the third received power and the third target power;

acquiring a fourth target value according to the fourth receiving power and the fourth target power;

determining that the fifth signal comprises the second passive intermodulation signal when the third target value is greater than the fourth target value.

10. The method of claim 8 or 9, wherein the first set of antenna groups comprises antenna groups adjacent to the first antenna group position in the first antenna group, and wherein the second set of antenna groups comprises antenna groups adjacent to the second antenna group position in the first antenna group.

11. An apparatus for detecting a passive intermodulation signal, the apparatus comprising:

the antenna system comprises a control module, a first antenna group and a second antenna group, wherein the control module is used for controlling the first antenna group in the antenna array to transmit a first signal, the antenna array comprises at least two antenna groups, and the first antenna group is one of the at least two antenna groups;

an obtaining module, configured to obtain a first receiving power and a second receiving power, where the first receiving power is a receiving power of a second signal received by the first antenna group, the second receiving power is a receiving power of a third signal received by a second antenna group, the second antenna group is an antenna group of the at least two antenna groups except the first antenna group, and receiving time periods corresponding to the second signal and the third signal are the same;

a determining module to determine, from the first receive power and the second receive power, that the second signal includes a first passive intermodulation signal corresponding to the first antenna group, the first passive intermodulation signal being excited by the first signal.

12. The apparatus of claim 11,

the determining module is specifically configured to determine that the second signal comprises the first passive intermodulation signal when the first receive power is greater than the second receive power.

13. The apparatus of claim 11,

the obtaining module is further configured to obtain a first target power and a second target power, where the first target power is a power corresponding to a first antenna group set, the second target power is a power corresponding to a 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 determining module is specifically configured to determine, from the first receive power, the first target power, the second receive power, and the second target power, that the second signal comprises the first passive intermodulation signal.

14. The apparatus of claim 13,

the obtaining module is further configured to obtain a first target value according to the first received power and the first target power;

the obtaining module is further configured to obtain a second target value according to the second received power and the second target power;

the determining module is specifically configured to determine that the second signal comprises the first passive intermodulation signal when the first target value is greater than the second target value.

15. The apparatus of claim 13 or 14, wherein the first set of antenna groups comprises antenna groups that are located adjacent to the first set of antenna groups on the antenna array, and wherein the second set of antenna groups comprises antenna groups that are located adjacent to the second set of antenna groups on the antenna array.

16. The apparatus of any of claims 11-15, wherein the first antenna group comprises at least two antenna groups:

the control module is further configured to control a first sub-antenna group to transmit a fourth signal, where the first sub-antenna group is one of the at least two sub-antenna groups;

the obtaining module is further configured to obtain a third receiving power and a fourth receiving power, where the third receiving power is a receiving power of a fifth signal received by the first antenna group, the fourth receiving power is a receiving power of a sixth signal received by the second antenna group, the second antenna group is a sub-antenna group of the at least two sub-antenna groups except the first antenna group, and receiving time periods corresponding to the fifth signal and the sixth signal are the same;

the determining module is further configured to 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 antenna group, the second passive intermodulation signal being excited by the fourth signal.

17. The apparatus of claim 16, wherein the means for determining is specifically configured to determine that the fifth signal comprises the second passive intermodulation signal when the third received power is greater than the fourth received power.

18. The apparatus of claim 16,

the obtaining module is further configured to obtain a third target power and a fourth target power, where the third target power is a power corresponding to a first antenna group set, the fourth target power is a power corresponding to a second antenna group set, the first antenna group set includes antenna groups in the first antenna group except the first antenna group, and the second antenna group set includes antenna groups in the first antenna group except the second antenna group;

the determining means is specifically configured to determine, from the third received power, the third target power, the fourth received power, and the fourth target power, that the fifth signal comprises the second passive intermodulation signal.

19. The apparatus of claim 18,

the obtaining module is further configured to obtain a third target value according to the third received power and the third target power;

the obtaining module is further configured to obtain a fourth target value according to the fourth received power and the fourth target power;

the determining module is further to determine that the fifth signal comprises the second passive intermodulation signal when the third target value is greater than the fourth target value.

20. The apparatus of claim 18 or 19, wherein the first set of antenna groups comprises antenna groups neighboring the first antenna group location, and wherein the second set of antenna groups comprises antenna groups neighboring the second antenna group location in the first antenna group.

21. A device for detecting a passive intermodulation signal, comprising:

a processor coupled with a memory for storing a program or instructions that, when executed by the processor, cause the detection apparatus of passive intermodulation signals to perform the method of any of claims 1-10.

22. A computer readable storage medium having stored thereon instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 1 to 10.

23. A chip system, comprising at least one processor and an interface for receiving data and/or signals, the at least one processor being configured to perform the method of any of claims 1 to 10.