Interference elimination method and device

Abstract

The present application discloses an interference elimination method and device, which are applied to a terminal, wherein the terminal includes a first antenna and a second antenna, and the first antenna and the second antenna support different communication protocols; the method includes: receiving a first signal through the first antenna; when it is determined that the first signal includes an interference signal and the interference signal is a signal of a communication protocol supported by the second antenna, estimating parameters of the interference signal according to the first signal to obtain the parameters of the interference signal; reconstructing the interference signal according to the parameters of the interference signal; and eliminating interference of the first signal through the reconstructed interference signal to generate a second signal.

Description

Technical Field

[0001] The present application relates to the field of wireless communication technology, and in particular to an interference elimination method and device. Background Art

[0002] With the development of science and technology, communication technology has advanced, showing ultra-high transmission rates and massive device connection characteristics. New services and application scenarios are constantly emerging. Users' service demand for wireless communications is growing rapidly, and the demand for signal bandwidth is also increasing. Due to the non-renewable nature of spectrum resources and the inefficient allocation and use methods, spectrum resources are becoming increasingly scarce. At the same time, in order to allow users to access various networks and services everywhere, more and more communication devices are equipped with multiple radio transceiver antennas.

[0003] For example, smartphones are usually equipped with transceivers corresponding to the long term evolution (LTE) communication system and the wireless fidelity (Wi-Fi) communication system, and customer premise equipment (CPE) supports both LTE and Wi-Fi wireless communication systems. According to the 3GPP frequency band division, LTE Band 40 (2.3-2.4GHz) and Wi-Fi signals near 2.4GHz coexist, and terminal communication devices are often small in size, highly integrated, and have limited antenna isolation. Therefore, there may be serious adjacent frequency interference problems between the transceiver supporting the LTE protocol and the transceiver supporting the Wi-Fi protocol in the terminal device, thereby affecting system performance and reducing user experience.

[0004] Adjacent channel interference is mainly divided into same-system adjacent channel interference and heterogeneous system adjacent channel interference. Compared with same-system adjacent channel interference, when heterogeneous system adjacent channel interference exists, the receiver cannot obtain prior information of the interference signal. Its interference has the characteristics of unknown interference signal parameters and nonlinear interference channel, making it more difficult to eliminate adjacent channel interference between heterogeneous systems. Eliminating interference from heterogeneous systems is a major challenge in academia and industry. Summary of the invention

[0005] The embodiments of the present application provide an interference elimination method and device for identifying interference signals from a foreign system, thereby making it easier to eliminate the interference signals from the foreign system.

[0006] In a first aspect, the present application provides an interference elimination method, which is applied to a terminal, wherein the terminal includes a first antenna and a second antenna, and the first antenna and the second antenna support different communication protocols; the method includes: receiving a first signal through the first antenna; when it is determined that the first signal includes an interference signal and the interference signal is a signal of a communication protocol supported by the second antenna, estimating parameters of the interference signal according to the first signal to obtain the parameters of the interference signal; reconstructing the interference signal according to the parameters of the interference signal; and eliminating interference with the first signal through the reconstructed interference signal to generate a second signal.

[0007] Through the above method, taking the first antenna as an antenna for receiving Wi-Fi signals and the second antenna as an antenna for sending LTE signals as an example, that is, in the scenario where the LTE uplink signal sent by the terminal interferes with the reception of the Wi-Fi signal, the interference of the transmitted LTE signal on the received Wi-Fi signal is eliminated by identifying the interference signal, reconstructing the interference signal, iteratively enhancing and other methods, so as to achieve the coexistence of the LTE uplink signal and the Wi-Fi downlink signal in the terminal, and avoid the deterioration of the Wi-Fi system performance without sacrificing spectrum resources. Different from the anti-interference method of FDM, LTE uplink interference signal identification, interference signal reconstruction, and iterative enhancement are used to eliminate the LTE uplink interference signal without moving the working channel of the non-interference signal. Different from the anti-interference method of time division multiplexing (TDM), the Wi-Fi signal is continuously received, and there is no need to receive the Wi-Fi signal and the LTE uplink interference signal in different time periods. Different from the anti-interference method of power control, the reception of the Wi-Fi signal is achieved on the premise that the power of the LTE uplink interference signal meets the standard, and there is no need to restrict the power of the LTE uplink interference signal more than the standard. Different from the method where the terminal automatically turns off the interference source, the Wi-Fi signal is received normally without turning off the interference channel adjacent to the Wi-Fi signal. This can avoid problems such as Wi-Fi user service interruption, service rate reduction, and Wi-Fi system coverage performance degradation.

[0008] For another example, when the first antenna is an antenna for receiving downlink LTE signals and the second antenna is an antenna for sending Wi-Fi uplink signals, that is, in a scenario where the Wi-Fi uplink signal interferes with the reception of the downlink LTE signal, the Wi-Fi interference signal in the received signal is identified and reconstructed to eliminate the Wi-Fi interference signal, thereby ensuring the performance of the LTE system and avoiding problems such as service rate reduction and service interruption in the LTE system.

[0009] In a possible implementation, when determining that the interference signal is a signal of a communication protocol supported by the second antenna, the interference signal can be determined to be a signal of a communication protocol supported by the second antenna according to the center frequency of the interference signal. Through the above method, it can be determined that the interference signal is an interference signal of a heterodyne system.

[0010] In a possible implementation, before estimating the parameters of the interference signal according to the first signal, it can also be determined that the signal strength of the non-interference signal of the first signal is less than or equal to the signal strength of the interference signal. Through the above method, when the signal strength of the non-interference signal is weak, the estimation and identification of the interference signal can be started, thereby improving the accuracy of the estimation and identification of the interference signal.

[0011] A possible implementation method is that before estimating the parameters of the interference signal based on the first signal, the non-interference signal can be reconstructed according to the parameters of the non-interference signal when the signal strength of the non-interference signal of the first signal is greater than the signal strength of the interference signal; in this way, when estimating the parameters of the interference signal based on the first signal, the parameters of the interference signal can be estimated through the reconstructed non-interference signal and the first signal.

[0012] Through the above method, when the signal strength of the non-interference signal is strong, the non-interference signal can be estimated first, and after the non-interference signal is reconstructed, it can be excluded from the interference signal to eliminate the influence of the non-interference signal on the estimation of the interference signal, thereby improving the accuracy of the estimation and identification of the interference signal.

[0013] In one possible implementation, before reconstructing the non-interference signal according to the parameters of the non-interference signal, it can also be determined that a cyclic redundancy check (CRC) corresponding to the non-interference signal is incorrect; and it is determined that the number of CRC operations on the non-interference signal is less than a preset threshold.

[0014] Through the above method, it can be determined whether the interference is eliminated based on the CRC result. In addition, in order to save the terminal's overhead and power consumption, when it is determined that the number of times the interference elimination is performed on the first signal is greater than or equal to the preset threshold, it is determined not to eliminate the interference on the first signal, and data detection is performed on the obtained first signal, or it is determined that the first signal reception fails.

[0015] In a possible implementation, when the CRC corresponding to the non-interference signal in the second signal is correct, it can be determined that the second signal is a signal after interference elimination. Through the above method, when the CRC result is correct, it is determined that the interference is eliminated, reducing the difficulty of interference elimination judgment.

[0016] In a possible implementation, when it is determined that the second signal is a signal whose interference has not been eliminated, the first signal is updated by the second signal, and interference elimination is performed on the updated first signal. Through the above method, interference elimination can be performed again on the first signal in an iterative manner to improve the effect of interference elimination.

[0017] In one possible implementation, it may be determined that the second signal is a signal whose interference has not been eliminated in the following manner: determining that the CRC corresponding to the non-interference signal is incorrect; and determining that the number of times the CRC is performed on the non-interference signal is less than a preset threshold.

[0018] Through the above method, it can be determined whether the interference is eliminated based on the CRC result. In addition, in order to save the terminal's overhead and power consumption, when it is determined that the number of times the interference elimination is performed on the first signal is greater than or equal to the preset threshold, it is determined not to eliminate the interference on the first signal, and data detection is performed on the obtained first signal, or it is determined that the first signal reception fails.

[0019] In a possible implementation, the parameters of the interference signal of the first signal or the second signal may include, but are not limited to, at least one of the following: modulation parameters, bandwidth parameters, channel parameters, noise power parameters, coding parameters, timing deviation parameters, frequency deviation parameters, and network parameters of the network to which the second antenna is connected. Alternatively, the parameters of the non-interference signal of the first signal may include, but are not limited to, at least one of the following: modulation parameters, bandwidth parameters, channel parameters, noise power parameters, coding parameters, timing deviation parameters, frequency deviation parameters, and network parameters of the network to which the first antenna is connected.

[0020] In a possible implementation manner, network parameters of the network accessed by the second antenna may be obtained through the second antenna.

[0021] In a possible implementation manner, the network parameter of the network accessed by the first antenna and / or the second antenna may include but is not limited to at least one of the following: a cell identifier and a radio network temporary identifier (RNTI).

[0022] Through the above method, the complexity of interference signal estimation can be reduced and the efficiency and effect of interference elimination can be improved based on obtaining the network parameters of the network to which the second antenna is connected.

[0023] In a possible implementation manner, when the parameters of the interference signal of the first signal include a frequency offset parameter, the method further includes: determining the frequency offset parameter of the interference signal of the first signal through cyclic redundancy of the CP of the first signal.

[0024] In a possible implementation manner, when the parameters of the interference signal of the first signal include a timing deviation parameter, the method further includes: determining the timing deviation parameter of the interference signal of the first signal through a signal sequence correlation of the first signal.

[0025] In a possible implementation, when the parameters of the interference signal of the first signal include channel parameters, the method further includes: determining the channel parameters of the interference signal of the first signal by an expectation-maximum (EM) algorithm or a moment-based algorithm.

[0026] In a possible implementation manner, when the parameters of the interference signal of the first signal include a bandwidth parameter, the method further includes: determining the bandwidth parameter of the interference signal of the first signal by performing wavelet edge detection on the first signal.

[0027] In a possible implementation, when the parameters of the interference signal of the first signal include noise power parameters, the method further includes: determining the noise power parameters of the interference signal of the first signal based on a maximum geometric mean method.

[0028] In a possible implementation, when the parameters of the interference signal of the first signal include coding parameters, the method further includes: encoding and identifying the interference signal of the first signal based on a method of syndrome likelihood characteristics to determine the coding parameters of the interference signal of the first signal.

[0029] In a possible implementation, when the parameters of the interference signal of the first signal include modulation parameters, the method further includes: determining the modulation parameters of the interference signal of the first signal based on a likelihood method or a feature-based method.

[0030] In a second aspect, the present application provides an interference elimination device, which is applied to a terminal, wherein the terminal includes a first antenna and a second antenna, and the first antenna and the second antenna support different communication protocols; the device includes a memory and a processor; the memory stores computer program instructions; the processor calls and executes the computer program instructions stored in the memory, so that the interference elimination device implements various possible design methods in the above-mentioned first aspect.

[0031] In a third aspect, an embodiment of the present application provides a communication device, which has the function of implementing the terminal device in the above aspects, and the communication device can be a terminal device or a chip included in the terminal device. The functions of the above communication device can be implemented by hardware, or by hardware executing corresponding software, and the hardware or software includes one or more modules or units or means corresponding to the above functions.

[0032] In a fourth aspect, an embodiment of the present application provides a chip system, comprising: a processor, the processor is coupled to a memory, the memory is used to store programs or instructions, and when the programs or instructions are executed by the processor, the chip system implements the various possible design methods in the first aspect above. Optionally, the chip system also includes an interface circuit, which is used to exchange code instructions to the processor.

[0033] Optionally, there may be one or more processors in the chip system, and the processor may be implemented by hardware or software. When implemented by hardware, the processor may be a logic circuit, an integrated circuit, etc. When implemented by software, the processor may be a general-purpose processor implemented by reading software code stored in a memory.

[0034] Optionally, the memory in the chip system may be one or more. The memory may be integrated with the processor or may be separately provided with the processor. Exemplarily, the memory may be a non-transient processor, such as a read-only memory ROM, which may be integrated with the processor on the same chip or may be provided on different chips.

[0035] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium having a computer program or instructions stored thereon. When the computer program or instructions are executed, the communication device executes a method in any possible design of the first aspect above.

[0036] In a sixth aspect, an embodiment of the present application provides a computer program product. When a communication device executes the computer program product, the communication device executes a method in any possible design of the first aspect above.

[0037] In the seventh aspect, an embodiment of the present application provides a terminal device, including a first antenna and a second antenna, wherein the first antenna and the second antenna support different communication protocols; and also includes the interference elimination device in the above-mentioned second aspect.

[0038] For the description of the technical effects that can be achieved in any of the second to seventh aspects, please refer to the description of the technical effects that can be achieved by the corresponding design in the first aspect, and this application will not go into details here. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A schematic diagram of the system architecture provided for an embodiment of the present application;

[0040] Figure 2 A schematic diagram of a possible application scenario of an embodiment of the present application;

[0041] Figure 3A schematic diagram of the structure of an interference elimination device provided in an embodiment of the present application;

[0042] Figure 4a-4b A flowchart of an interference elimination method provided in an embodiment of the present application;

[0043] Figure 5 A schematic diagram of the structure of an interference elimination device provided in an embodiment of the present application;

[0044] Figure 6 A flowchart of an interference elimination method provided in an embodiment of the present application;

[0045] Figure 7 A schematic diagram of the structure of an interference elimination device provided in an embodiment of the present application;

[0046] Figure 8 A flowchart of an interference elimination method provided in an embodiment of the present application;

[0047] Fig. 9 A schematic diagram of the structure of an interference elimination device provided in an embodiment of the present application;

[0048] Fig.10 A schematic diagram of the structure of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0050] The embodiment of the present application provides an interference elimination device and method, which is helpful for eliminating interference in multi-antenna application scenarios where interference exists between different communication systems. Among them, the device and the method are based on the same technical concept. Since the principles of solving the problem by the device and the method are similar, the implementation of the device and the method can refer to each other, and the repetition is not repeated. In the description of the embodiment of the present application, "and / or" describes the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. At least one involved in the present application refers to one or more; the multiple involved refers to two or more. In addition, it should be understood that in the description of the present application, words such as "first" and "second" are only used for the purpose of distinguishing the description, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying order, nor can they be understood as indicating or implying quantity and / or size.

[0051] The interference elimination device and method provided in the embodiments of the present application can be applied to various communication systems, such as: long term evolution (LTE) system, worldwide interoperability for microwave access (WiMAX) communication system, fifth generation (5G) new radio (NR) communication system, and future communication systems such as 6G system.

[0052] Figure 1 The architecture of a possible communication system to which the present application embodiment can be applied is shown. Figure 1 As shown, the communication system 100 includes: a network device 101 and a terminal 102. The interference elimination device provided in the embodiment of the present application can be applied to the terminal 102. It can also be considered that the interference elimination device can be the terminal 102 or a chip in the terminal 102.

[0053] The network device 101 is a device with a wireless transceiver function or a chip that can be set in the device. The device includes but is not limited to: evolved Node B (eNB), radio network controller (RNC), Node B (NB), base station controller (BSC), base transceiver station (BTS), home base station (e.g., home evolved NodeB, or homeNode B, HNB), baseband unit (BBU), access point (AP) in wireless fidelity (WIFI) system, wireless relay node, wireless backhaul node, transmission point (TRP or transmission and reception point) It can also be a gNB in ​​a 5G, such as NR, system, or a transmission point (TRP or TP), one or a group of (including multiple antenna panels) antenna panels of a base station in a 5G system, or it can also be a network node constituting a gNB or a transmission point, such as a baseband unit (BBU), or a distributed unit (DU), etc.

[0054] In some deployments, the gNB may include a centralized unit (CU) and a DU. The gNB may also include a radio unit (RU). The CU implements some functions of the gNB, and the DU implements some functions of the gNB, for example, the CU implements the functions of the radio resource control (RRC) and packet data convergence protocol (PDCP) layers, and the DU implements the functions of the radio link control (RLC), media access control (MAC) and physical (PHY) layers. Since the information of the RRC layer will eventually become the information of the PHY layer, or be converted from the information of the PHY layer, under this architecture, high-level signaling, such as RRC layer signaling or PHCP layer signaling, can also be considered to be sent by the DU, or by the DU+RU. It can be understood that the network device can be a CU node, a DU node, or a device including a CU node and a DU node. In addition, the CU can be divided into a network device in the access network RAN, and the CU can also be divided into a network device in the core network CN, which is not limited here.

[0055] The terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The terminal device in the embodiments of the present application may be a mobile phone, a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. The embodiments of the present application do not limit the application scenarios. In the present application, the terminal device with wireless transceiver function and the chip that can be set in the aforementioned terminal device are collectively referred to as terminal device.

[0056] In some embodiments, the network device may be an AP, which may be a router, or other terminal or electronic device with WiFi access function. The connection between the wireless station and the wireless access point is a wireless local area network (WLAN) connection. The wireless local area network connection may include a WiFi connection. The terminal device may be a STA. In a WLAN communication system, one AP may access one or more STAs.

[0057] The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. A person of ordinary skill in the art can appreciate that with the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0058] The following example illustrates an interference scenario to which the present application can be applied, for example, a scenario in which LTE Band 40 (2.3-2.4 GHz) and 2.4 GHz Wi-Fi interference coexist in terminal devices such as mobile phones or CPEs.

[0059] like Figure 2 As shown in Figure 1, in order to enable users to access various networks and carry out a variety of services, more and more wireless communication modules are integrated into mobile phones or CPEs. For example, mobile phones or CPEs have transmitters and receivers for LTE and Wi-Fi at the same time. Figure 2 As shown, when the communication module is an LTE communication module, the LTE transmitter may include: an LTE baseband unit, an LTE radio frequency unit and a transmitting antenna (for example, ANT#1). The LTE receiver may also include: an LTE baseband unit, an LTE radio frequency unit and a receiving antenna (for example, ANT#1). When the communication module is a Wi-Fi communication module, the Wi-Fi transmitter may include: a Wi-Fi baseband unit, a Wi-Fi radio frequency unit and a transmitting antenna (for example, ANT#2). The Wi-Fi receiver may also include: a Wi-Fi baseband unit, a Wi-Fi radio frequency unit and a receiving antenna (for example, ANT#2). Among them, the receiving antenna and the transmitting antenna of each transmitter and receiver can be reused or set separately, which is not limited here. In the same terminal, the transmission power of one communication module is often much higher than the receiving power of another communication module. When different communication modules work in adjacent frequencies, serious self-interference may occur between the communication modules.

[0060] Taking mobile phones as an example, in this scenario, the mobile phone devices are small in size, and the interference signals still have high power after being spatially isolated. At the same time, due to the limitations of current filter technology, the service quality is seriously affected. For example, when a user is using LTE Band 40 signals for voice calls, and at the same time the user is using Wi-Fi to download online games, videos, music and other data, the Wi-Fi signal received by the UE will interfere with the normal voice call, causing the call quality to deteriorate. At the same time, the LTE uplink signal will also interfere with Wi-Fi, affecting data downloads.

[0061] For example, in the CPE application scenario, CPE is a mobile signal access device that receives mobile signals and forwards them as wireless Wi-Fi signals. However, the device has a large transmission power. The LTE Band 40 signal input by the CPE and the strong Wi-Fi signal output in the 2.4GHz frequency band are prone to long-term self-interference, which will seriously affect the communication quality of the CPE. For example, it will affect the normal use of devices such as Bluetooth speakers and personal laptops, make it impossible to achieve secure face recognition, affect the control of smart home appliances, etc. Problems such as waste of spectrum resources, reduced service rate, service interruption, and reduced service coverage performance caused by adjacent frequency interference of different systems.

[0062] In some examples, hardware- or software-based receiving-end interference elimination methods, such as antenna isolation, antenna cancellation, analog interference elimination based on circuit design, and other hardware methods usually require changes to the hardware structure, have poor flexibility, and are costly. Software methods such as maximum ratio combining, interference suppression combining, and filter design have poor practicality and limited interference elimination effects, and are not suitable for interference elimination between different systems.

[0063] Another example is the frequency division multiplexing (FDM) anti-interference method, which is to migrate the LTE working channel away from the Wi-Fi frequency band range and migrate the Wi-Fi working channel away from the LTE frequency band range. In this scheme, the terminal reports to the network whether it is appropriate or inappropriate to transmit / receive at a certain frequency. The terminal's decision is the basis of frequency division multiplexing. For example, the terminal will inform the network which frequencies are unavailable due to interference within the terminal. In the FDM scheme, the interfering frequencies are set to unavailable, thereby avoiding interference by sacrificing a portion of the spectrum resources, which causes serious waste of spectrum resources when spectrum resources are tight.

[0064] The TDM-based anti-interference method ensures that the transmission of a wireless signal will not collide with the reception of another signal. Specifically, it includes the following three types of solutions: Discontinuous Reception (DRX)-based solution, hybrid automatic repeat request (HARQ) processing, and uplink scheduling restriction. Among them, the core idea of ​​the DRX-based solution and the uplink scheduling restriction solution is that the terminal provides the base station with the expected TDM sequence, such as the period of the TDM sequence and the scheduling / non-scheduling time, and then the base station determines and sends the final DRX configuration method based on the TDM sequence recommended by the terminal and other possible standards, such as service type. In the solution based on HARQ processing, a certain number of HARQ processes or subframes are reserved for non-interference signals, and the remaining subframes are used to carry other services. The TDM solution needs to ensure that the interference signal and the non-interference signal are not sent and received at the same time, so some service rate performance will be sacrificed.

[0065] The anti-interference method based on power control is to control the power of the interference signal, which includes reducing the LTE downlink signal transmission power to reduce interference to the Wi-Fi receiver and reducing the Wi-Fi signal transmission power to reduce interference to the LTE receiver. The power control scheme limits the power of the interference signal, thus sacrificing the coverage performance of the service.

[0066] The terminal implements the anti-interference method by closing the interference channel. That is, to protect the LTE downlink signal, the terminal can automatically close the Wi-Fi interference channel, or to protect the Wi-Fi signal, the terminal can automatically close the LTE working channel. Since the terminal closes the interference channel, the working service may be interrupted for a short time, affecting the normal use of users.

[0067] Therefore, based on the above problems, the embodiments of the present application provide an interference elimination method and an interference elimination device. Identifying, reconstructing and eliminating interference signals of different systems can effectively guarantee the service quality of LTE or Wi-Fi and prevent the system performance from deteriorating sharply due to large interference.

[0068] The structure of the interference elimination device provided in the embodiment of the present application is as follows: Figure 3As shown. The interference elimination device includes one or more antenna modules. The design of the structure in any antenna module is the same. The number of antenna modules can be consistent with the number of transceiver antennas in the multi-antenna scenario in which the interference elimination device is applied. It is also possible that an antenna module includes multiple transceiver antennas, or an antenna module includes one or more transmitting antennas, or one or more receiving antennas, which are not limited here. The following is an example in which an antenna module includes a transceiver antenna. Other methods can refer to this example and will not be repeated here. The introduction of the concept of antenna module in this application is to facilitate the understanding of the interference elimination device of this application. It can be considered as a logical division in the interference elimination device.

[0069] The following describes the structural design of any antenna module. The design of each antenna module in the interference elimination device can refer to this description. Figure 3 As shown, the antenna module includes a transceiver antenna, a signal detection module, a non-interference signal reconstruction module, an interference signal reconstruction module, a first combining module, a second combining module, and an interference signal identification module. Among them, the transceiver antenna is used to send and receive data, including a sending port and a receiving port. For the convenience of distinction, the transceiver antenna includes a sending port for sending signals. The receiving port can send the received signal to the signal detection module, and the signal detection module determines whether it is necessary to eliminate interference with the signal. The module for specifically eliminating interference with the signal may include a non-interference signal reconstruction module, an interference signal reconstruction module, a first combining module, and a second combining module. For example, the interference signal identification module and the interference signal reconstruction module can identify and reconstruct the interference signal in the signal, and the non-interference signal reconstruction module can reconstruct the non-interference signal in the signal. The first combining module can combine or superimpose the interference signal reconstructed by the interference signal reconstruction module with the signal to be combined to offset the reconstructed interference signal in the signal to be combined. The second combining module can combine or superimpose the non-interference signal reconstructed by the interference signal reconstruction module with the signal to be combined to offset the reconstructed non-interference signal in the signal to be combined.

[0070] Figure 3 Take the interference elimination device including two antenna modules as an example for illustration, that is, the interference elimination device includes a first antenna module and a second antenna module, the first antenna module is connected to the first antenna and is used to process the signal received by the first antenna, the second antenna module is connected to the second antenna and is used to process the signal received by the second antenna, and the first antenna and the second antenna belong to different communication systems. In practical applications, the number of antenna modules can be any positive integer. The two transmitting and receiving antennas in the two antenna modules are Figure 3In the following, the first antenna module corresponds to a first antenna that is an antenna for receiving signals, and the second antenna module corresponds to a second antenna that is an antenna for transmitting interference signals. The first antenna module may include:

[0071] A transceiver antenna is used to receive a first signal through a first receiving port. The first signal includes an interference signal and a signal sent by other communication devices. For example, if the interference elimination device is a terminal, the first signal includes an interference signal and a non-interference signal from a network device. The interference signal in the first signal includes signals sent by all transceiver antennas in all antenna modules other than the first antenna module in the interference elimination device and received by the first receiving port. For example, the interference elimination device includes two antenna modules, that is, two transceiver antennas, and the interference signal in the first signal includes signals sent by the transceiver antenna of the second antenna module and received by the first receiving port.

[0072] The signal detection module is used to determine whether the first signal is subjected to interference elimination. If so, the first signal is input into the reconstruction module, and the first signal is synchronously transmitted to the first combining module. If not, data detection is directly performed on the first signal to obtain data of the non-interference signal in the first signal.

[0073] In some embodiments, the signal detection module can parse the CRC corresponding to the non-interference signal in the first signal to determine whether the CRC is correct. When the CRC is determined to be correct, it can be determined that the interference of the first signal has been eliminated, or that the interference of the first signal does not affect the terminal's reception of the non-interference signal, and therefore, it can be determined that the first signal is not subjected to interference elimination.

[0074] Optionally, considering that in the present application, the interference-eliminated second signal obtained after the reconstruction module and the first combining module may not achieve the purpose of interference elimination. At this time, the signal detection module can detect the non-interference signal in the second signal by performing CRC, decoding, etc., and then determine whether the interference of the non-interference signal in the second signal is eliminated, that is, determine whether it is necessary to repeat the steps of reconstructing the interference signal and eliminating the interference signal again.

[0075] For example, the CRC corresponding to the non-interference signal in the second signal is parsed, and it is determined that the CRC is incorrect. At this time, the first signal can be updated through the second signal, and the updated first signal can be re-interference-eliminated through the reconstruction module and the first combining module. That is, in the present application, interference elimination of the first signal can be performed multiple times, that is, it can be iterated multiple times. Therefore, in order to save the terminal's overhead and power consumption, when it is determined that the number of times interference elimination is performed on the first signal is greater than or equal to a preset threshold, it is determined not to perform interference elimination on the first signal, and data detection is performed on the obtained first signal, or it is determined that the first signal reception fails.

[0076] In some embodiments, the signal detection module may further include: a decision module for determining whether the first signal has adjacent frequency interference. Alternatively, determining whether the non-interference signal and the interference signal in the first signal are in different systems. When it is determined that the first signal has adjacent frequency interference, and the non-interference signal and the interference signal in the first signal are in different systems, the first signal is input into the reconstruction module.

[0077] The reconstruction module is used to estimate and / or identify the parameters of the interference signal according to the first signal, and generate a reconstructed interference signal according to the obtained parameters of the interference signal. Alternatively, the non-interference signal is reconstructed according to the parameters of the first signal and the non-interference signal, and a reconstructed first signal is generated according to the reconstructed non-interference signal, and then the parameters of the interference signal are estimated and / or identified to generate a reconstructed interference signal.

[0078] In some embodiments, the reconstruction module may further include: an interference signal identification module, which is used to estimate and identify the parameters of the interference signal, including time and frequency synchronization parameters, channel parameters, noise parameters, modulation and coding parameters, etc. The reconstruction module may further include: an interference signal reconstruction module, which is used to reconstruct the interference signal based on the parameters of the interference signal. A non-interference signal reconstruction module, which is used to reconstruct the non-interference signal based on the parameters of the non-interference signal.

[0079] Optionally, some of the parameters of the interference signal can also be obtained by the second antenna module based on the network device corresponding to the second antenna. For example, the second antenna module can obtain relevant parameters of the cell when communicating with the network device. For example, the cell identifier corresponding to the interference signal, so that, according to the cell identifier, the structure information of the possible downlink reference signal of the interference signal, the configuration of the frequency division multiplexing mode, the configuration of the time division multiplexing mode, the configuration of the cell bandwidth corresponding to the downlink / uplink and the subframe configuration, etc. can be determined. Figure 3 The dotted line in indicates that the second antenna module can also transmit information irrelevant to the reconstruction to the first antenna module.

[0080] For another example, the RNTI corresponding to the second antenna module can also be obtained through the second antenna module. For example, the RNTI of the second antenna module can be used to parse information such as DCI and CRC of the interference signal. Therefore, after the first antenna module obtains parameters such as the cell identifier and RNTI, and parameters such as time and frequency synchronization parameters, channel parameters, noise parameters, modulation and coding parameters estimated and / or identified for the interference signal, it is beneficial for the first antenna module to reconstruct the interference signal.

[0081] For another example, the RNTI of the second antenna module may include multiple types of RNTIs, for example, slot format indicator (SFI)-RNTI, which is used to identify the slot format. Transmit power control (transmit power control) TPC-physical uplink control channel (physical uplink control channel, PUCCH)-RNTI: a unique UE identifier used to control the PUCCH power. TPC-physical uplink shared channel (physical uplink shared channel, PUCCH)-RNTI: a unique UE identifier used to control the power of PUSCH; TPC-SRS-RNTI: a unique UE identifier used to control the SRS power. Thus, after obtaining the corresponding RNTI, the first antenna module can help assist the interference signal identification module in estimating and identifying other unknown parameters of the interference signal. In some embodiments, the first antenna module may request parameters related to the reconstructed interference signal from the second antenna module. Thus, the second antenna module may send parameters related to the reconstructed interference signal to the first antenna module.

[0082] The non-interference signal reconstruction module is also used to transmit the reconstructed signal of the non-interference signal to the second combining module. The second combining module is used to receive the reconstructed signal from the reconstruction module. The second combining module can receive two signals, including a first signal from a transceiver antenna and a reconstructed signal from the non-interference signal reconstruction module. The second combining module is also used to differentially combine the first signal and the reconstructed signal, and output the canceled signal. Among them, the reconstructed signal is used to cancel the non-interference signal in the first signal, so that after the non-interference signal is canceled, the interference signal in the first signal can be output. At this time, according to the interference signal in the output first signal, it is more conducive for the interference signal identification module to identify the parameters of the interference signal in the first signal, thereby improving the recognition effect of the parameters of the interference signal.

[0083] The interference signal reconstruction module is also used to transmit the reconstructed signal of the interference signal to the first combining module. The first combining module is used to receive the reconstructed signal from the reconstruction module. The first combining module can receive two signals, including a first signal from a transceiver antenna and a reconstructed signal from a reconstruction module. The first combining module is also used to differentially combine the first signal and the reconstructed signal, and output a canceled signal. The reconstructed signal is used to cancel the interference signal in the first signal, so that after the interference signal is canceled, the non-interference signal in the first signal can be output. Figure 3 The first antenna module and the second antenna module in the terminal may be integrated into a processor in the terminal or exist separately, for example, in the form of a baseband chip.

[0084] based on Figure 2 and Figure 3 The terminal shown in the figure has a dual antenna structure, and the embodiment of the present application provides an interference elimination method, such as Figure 4a and Figure 4b As shown, the interference elimination method provided in the embodiment of the present application is as follows:

[0085] Step 401: The first antenna module receives a first signal through the first antenna.

[0086] The first signal may be a mixed signal including an interference signal, that is, the first signal includes a received signal from the first antenna and a transmitted signal from the second antenna, or the first signal includes a received signal from the first antenna and a received signal from the second antenna.

[0087] Step 402: The first antenna module determines that the first signal includes an interference signal, and the interference signal is a signal of a communication protocol supported by the second antenna.

[0088] In a possible implementation manner, the first antenna module determines whether the non-interference signal has adjacent channel interference based on signaling such as a working channel in the non-interference signal.

[0089] In some embodiments, in combination Figure 3 The signal detection module in the first antenna module can determine whether there is adjacent frequency interference in the non-interference signal based on signaling such as the working channel in the non-interference signal.

[0090] For example, when the first antenna module is a Wi-Fi module, the first antenna module determines whether interference elimination is required based on the working channel of the Wi-Fi signal. If it is near 2.4 GHz, it is determined that there may be adjacent channel interference, otherwise, no interference elimination is performed and Wi-Fi signal detection is performed directly.

[0091] For another example, when the first antenna module is an LTE module, the first antenna module determines whether to perform interference elimination according to the working channel of the LTE downlink signal. If it is near 2.4 GHz, it is determined that there may be adjacent channel interference, otherwise, no interference elimination is performed and Wi-Fi signal detection is performed directly.

[0092] In one possible implementation, the interference signal is determined to be a signal of a communication protocol supported by the second antenna according to the center frequency of the interference signal. For example, when the signal detection module includes a decision module, the decision module determines whether the non-interference signal and the interference signal are of different systems according to the obtained signaling such as the center frequency of the interference signal. Exemplarily, the decision module can estimate the center frequency of the interference signal by using a fast Fourier method or other center frequency estimation methods.

[0093] In some embodiments, the signal detection module can determine whether the CRC of the first signal is correct according to the first antenna module, and determine whether the interference in the first signal is eliminated. For example, when the first antenna module determines that the CRC of the first signal is incorrect, it determines to execute steps 403-405.

[0094] Step 403: The first antenna module estimates the parameters of the interference signal according to the first signal to obtain the parameters of the interference signal.

[0095] In some embodiments, in combination Figure 3 The reconstruction module estimates the parameters of the interference signal of the first signal according to the first signal to obtain the parameters of the interference signal of the first signal.

[0096] Considering that the signal strengths of the interference signal and the non-interference signal are different, for example, the signal strength of the interference signal is greater than the signal strength of the non-interference signal, then it is easier to reconstruct the interference signal based on the first signal. If the signal strength of the interference signal is less than the signal strength of the non-interference signal, then it is easier to reconstruct the non-interference signal based on the first signal.

[0097] In one possible implementation, when the first antenna module determines that the signal strength of the non-interference signal of the first signal is less than or equal to the signal strength of the interference signal of the first signal, the first antenna module estimates and identifies the parameters of the interference signal of the first signal based on the interference signal of the first signal to obtain the parameters of the interference signal of the first signal.

[0098] Another possible implementation method is that when the first antenna module determines that the signal strength of the non-interference signal of the first signal is greater than the signal strength of the interference signal of the first signal, the non-interference signal is first reconstructed based on the first signal, the reconstructed non-interference signal is offset from the first signal, and then the parameters of the interference signal in the first signal are estimated and identified, so that subsequent interference signal reconstruction can be performed more accurately.

[0099] Specifically, it may include: a non-interference signal reconstruction module reconstructs the non-interference signal of the first signal according to the parameters of the non-interference signal of the first antenna; a second combining module obtains the estimated interference signal of the first signal through the reconstructed non-interference signal of the first signal and the first signal; the second combining module inputs the estimated interference signal of the first signal to the interference signal identification module, and the interference signal identification module estimates the parameters of the interference signal of the first signal according to the estimated interference signal of the first signal.

[0100] Optionally, considering that the interference signal may not affect the decoding of the non-interference signal of the first antenna, when the first antenna module determines that the CRC of the first signal is correct, decoding can be performed based on the first signal without executing steps 403 to 405.

[0101] Step 404: The first antenna module reconstructs the interference signal of the first signal according to the parameters of the interference signal of the first signal.

[0102] In a possible implementation, the parameters of the interference signal of the first signal may include at least one of the following: modulation parameters, bandwidth parameters, channel parameters, noise power parameters, coding parameters, timing deviation parameters, frequency deviation parameters, and network parameters of the network to which the second antenna is connected; the network parameters of the network to which the second antenna is connected may include at least one of the following: cell identifier, wireless network identifier. The network parameters of the network to which the second antenna is connected may be obtained through the second antenna module.

[0103] In some embodiments, the LTE uplink signal identification module may include a bandwidth estimation module, a frequency offset estimation and timing synchronization module, a channel estimation and equalization module, a modulation and coding identification module, a demodulation and decoding module, etc.

[0104] When the parameters of the interference signal of the first signal include bandwidth parameters, the bandwidth estimation module may determine the bandwidth parameters of the interference signal of the first signal by performing wavelet edge detection on the interference signal of the first signal.

[0105] When the parameters of the interference signal of the first signal include frequency deviation parameters, the frequency deviation estimation and timing synchronization module can determine the frequency deviation parameters of the interference signal of the first signal through the cyclic redundancy of the CP of the first signal. In a possible implementation, the parameters of the interference signal of the first signal include timing deviation parameters; in this case, the frequency deviation estimation and timing synchronization module can determine the timing deviation parameters of the interference signal of the first signal through the signal sequence correlation of the first signal.

[0106] When the parameters of the interference signal of the first signal include channel parameters, the channel estimation and equalization module may perform blind channel estimation on the channel by using an EM algorithm or a moment-based algorithm to determine the channel parameters of the interference signal of the first signal.

[0107] When the parameter of the interference signal of the first signal includes a noise power parameter, the noise power parameter of the interference signal of the first signal may be determined based on a maximum geometric mean method.

[0108] When the parameters of the interference signal of the first signal include coding parameters, the modulation and coding identification module can perform coding identification on the interference signal of the first signal to determine the coding parameters of the interference signal of the first signal. For example, the coding method of the interference signal can be blindly identified based on the possible coding methods of the interference signal and the mathematical structure corresponding to the possible coding methods. In a possible implementation method, the parameters of the interference signal of the first signal include modulation parameters; in this case, the modulation and coding identification module can determine the modulation parameters of the interference signal of the first signal based on a likelihood method or a feature-based method.

[0109] It should be noted that the identification of the interference signal parameters and the corresponding methods described above are merely specific examples provided in this embodiment, and the present application is not limited thereto.

[0110] In some embodiments, when the interference identification module has obtained parameters related to the reconstruction of the interference signal, the interference reconstruction module needs to perform reconstruction in combination with the parameters of the interference signal.

[0111] In one possible implementation, the parameters related to the reconstruction of the interference signal obtained by the second antenna module are passed to the interference signal identification module. For example, the parameters related to the reconstruction of the interference signal obtained by the second antenna module may include network parameters of the network to which the second antenna is connected, such as a cell identifier and a wireless network identifier. These parameters remain unchanged over a certain time interval, and therefore can be passed to the first antenna module without the need for the first antenna module to perform an estimation, so as to reduce the complexity of the first antenna module. In some embodiments, the second antenna module may be passed to the first antenna module by wire.

[0112] In other embodiments, when the interference identification module does not obtain parameters related to the reconstruction of the interference signal, the interference signal can be reconstructed using the parameters of the interference signal estimated by the interference signal identification module. The interference signal identification module passes the estimated interference signal parameters to the interference signal reconstruction module, and the interference signal reconstruction module reconstructs the interference signal in combination with the reconstruction-related signaling from the terminal interference generation module.

[0113] Accordingly, considering the reconstruction of the non-interference signal, the above-mentioned method of reconstructing the interference signal can be referred to, with the difference that the parameters of the non-interference signal can be obtained through the first antenna module. For example, the network parameters of the network to which the first antenna is connected can be obtained through the first antenna module. In a possible implementation, the parameters of the non-interference signal of the first signal include at least one of the following: modulation parameters, bandwidth parameters, channel parameters, noise power parameters, coding parameters, timing deviation parameters, frequency deviation parameters, and network parameters of the network to which the first antenna is connected.

[0114] Step 405: The first antenna module eliminates interference of the first signal by reconstructing the interference signal of the first signal to generate a second signal.

[0115] In some embodiments, it can be determined whether the CRC of the second signal is correct based on the first antenna module, and whether the interference in the second signal is eliminated.

[0116] For example, when the first antenna module determines that the CRC of the second signal is incorrect, the first signal is replaced by the second signal, and the process returns to step 403 to step 405.

[0117] For example, based on the replaced first signal, parameters of the interference signal of the replaced first signal are estimated and identified to obtain the parameters of the interference signal of the replaced first signal; the first antenna module reconstructs the interference signal of the replaced first signal based on the parameters of the interference signal of the replaced first signal; the first antenna module eliminates interference with the replaced first signal through the reconstructed interference signal of the replaced first signal to generate a second signal.

[0118] Repeat the above iterative process (i.e., replace the first signal with the second signal, and return to step 403-step 405) until the number of iterations is greater than a preset threshold. Alternatively, repeat the above iterative process until the first antenna module determines that the CRC of the first signal is correct, that is, determines that the interference of the first signal is eliminated.

[0119] The number of iterations can be determined by the number of CRCs of the first signal. That is, when the first antenna module determines that the number of CRCs of the first signal is less than a preset threshold and the CRC of the first signal is incorrect, the first signal is replaced by the second signal, and the process returns to step 403-step 405 to perform the next iteration.

[0120] Thus, the interference signal in the first signal is eliminated by the cooperation of the non-interference signal detection and reconstruction module, the interference signal identification module and the interference signal reconstruction module. Considering that the parameters of the interference signal of the heterogeneous system are unknown, the present application completes the reconstruction of the interference signal by estimating and identifying the parameters of the interference signal, based on the estimated parameters of the interference signal, so that the interference signal in the heterogeneous system can be effectively eliminated, and the heterogeneous system interference signal can be eliminated without sacrificing spectrum resources, thereby ensuring system performance and avoiding problems such as service rate reduction, service interruption and service coverage performance degradation.

[0121] Example 1

[0122] Taking the LTE Band 40 (2.3-2.4 GHz) frequency band signal sent in the terminal to interfere with the 2.4 GHz Wi-Fi signal as an example, the specific process of eliminating LTE uplink interference in the Wi-Fi system is described in detail. The structural diagram corresponding to this embodiment and its signaling interaction relationship are shown in FIG. Figure 5 As shown. The terminal includes the following modules: an LTE module and a Wi-Fi module. Among them, the Wi-Fi module includes: an LTE uplink signal identification module, an LTE uplink signal reconstruction module, a first combining module, a second combining module, a Wi-Fi signal detection module and a Wi-Fi signal reconstruction module. The Wi-Fi module can correspond to the first antenna module in the above embodiment, the LTE uplink signal identification module can correspond to the interference signal identification module, the LTE uplink signal reconstruction module can correspond to the interference signal reconstruction module, the Wi-Fi signal detection module can correspond to the signal detection module, and the Wi-Fi signal reconstruction module can correspond to the non-interference signal reconstruction module. Figure 5 The dotted line in indicates that the LTE module can also transmit information irrelevant to the reconstruction with the Wi-Fi module.

[0123] based on Figure 5 The present application also provides an interference elimination method, such as Figure 6 As shown, the interference elimination method process provided in the embodiment of the present application is as follows.

[0124] Step 601: The Wi-Fi module receives a first signal, wherein the first signal may include an uplink interference signal of LTE Band 40 and a Wi-Fi signal.

[0125] Step 602: The Wi-Fi module determines whether to perform interference elimination according to the working channel of the Wi-Fi signal. If yes, execute step 603; if no, execute step 6012.

[0126] In a possible implementation, the Wi-Fi signal detection module in the Wi-Fi module can determine whether there may be interference according to the frequency band of the first signal, thereby determining whether to perform interference elimination. For example, if it is determined that the first signal is near 2.4 GHz, it is determined that there may be interference with the first signal.

[0127] In another possible implementation, the Wi-Fi signal detection module in the Wi-Fi module may determine whether to perform interference elimination according to whether the CRC corresponding to the Wi-Fi signal in the first signal is correct.

[0128] Step 603: The Wi-Fi signal detection module in the Wi-Fi module determines whether the interference signal in the first signal is interference from a different system based on the central frequency of the interference signal in the first signal. If yes, step 604 is executed; if no, step 6012 is executed.

[0129] In one possible implementation, the decision module estimates the center frequency of the interference signal in the first signal, and determines whether the interference signal and the Wi-Fi signal are in different systems based on the comparison of the center frequency of the interference signal with the center frequency of the Wi-Fi signal. Specifically, the method of estimating the center frequency of the interference signal in the first signal can be to estimate the center frequency of the interference signal based on the fast Fourier method or other center frequency estimation methods. The center frequency of the Wi-Fi signal in the first signal can also be determined based on the same method, or based on the signaling fed back by the base station, which is not limited here.

[0130] In some embodiments, when the decision module determines whether the interference signal in the first signal is interference from a different system, the parameters of the interference signal, such as the estimated center frequency of the interference signal, can also be passed to the LTE uplink signal identification module, or the LTE uplink signal reconstruction module, so that the LTE uplink signal identification module estimates and identifies the parameters of the interference signal according to the center frequency of the interference signal, or the LTE uplink signal reconstruction module reconstructs the interference signal according to the center frequency of the interference signal.

[0131] Step 604: The Wi-Fi signal detection module determines whether the CRC corresponding to the Wi-Fi signal is correct according to the obtained first signal. If so, execute step 6012; if not, execute step 605;

[0132] Optionally, the Wi-Fi signal detection module determines whether the number of iterations in the interference elimination process of the Wi-Fi signal reaches a preset threshold. If so, the interference elimination of the Wi-Fi signal is stopped and step 6012 is executed. If not, the result of step 604 is executed.

[0133] Step 605: The Wi-Fi module determines whether the signal strength of the LTE uplink signal is greater than the signal strength of the Wi-Fi signal through the received first signal. If so, execute step 606b; otherwise, execute step 606a.

[0134] Step 606a: The Wi-Fi signal reconstruction module reconstructs the Wi-Fi signal according to the parameters of the Wi-Fi signal in the first signal, and transmits the reconstructed Wi-Fi signal to the second combining module.

[0135] Step 607a: The second combining module obtains a third signal according to the reconstructed Wi-Fi signal and the first signal, and transmits the third signal to the LTE uplink signal identification module, wherein the third signal is a signal obtained by eliminating the reconstructed non-interference signal from the first signal.

[0136] Step 608a: The LTE uplink interference signal identification module identifies parameters of the LTE uplink signal according to the third signal.

[0137] Step 606b: The LTE uplink signal identification module estimates the parameters of the LTE signal in the first signal to obtain the parameters of the LTE uplink signal. The LTE uplink signal identification module transmits the identified parameters of the LTE uplink signal to the LTE uplink signal reconstruction module.

[0138] Step 609: The LTE uplink signal reconstruction module reconstructs the LTE uplink signal according to the first signal and the parameters of the LTE uplink signal, and transmits the reconstructed LTE uplink signal to the first combining module.

[0139] Optionally, the LTE module may transmit the parameters of the access network of the LTE uplink signal to the Wi-Fi module. The parameters of the access network of the LTE uplink signal may include at least one of the following: parameters such as the cell ID and RNTI corresponding to the LTE module.

[0140] In this embodiment, the LTE module is the source of the interference signal, so some parameters of the interference signal can be obtained based on the LTE module. For example, when reconstructing the LTE interference signal, parameters such as cell ID and RNTI need to be used. These parameters remain unchanged in a certain time interval, so they can be passed to the Wi-Fi module. In some embodiments, the LTE module can be passed to the Wi-Fi module in a wired manner.

[0141] Step 6010: The first combining module obtains a second signal according to the first signal and the reconstructed LTE uplink signal. The second signal is a signal obtained by eliminating the reconstructed LTE uplink signal from the first signal. Exemplarily, the first combining module subtracts the reconstructed LTE uplink signal from the mixed signal to obtain the second signal.

[0142] Step 6011: the first combining module updates the first signal according to the obtained second signal, and returns to step 604.

[0143] Step 6012: The Wi-Fi module performs data detection on the obtained first signal to obtain data in the Wi-Fi signal in the first signal.

[0144] Through the above method, in the scenario where the terminal LTE uplink signal interferes with Wi-Fi reception, the interference is eliminated by identifying the interference signal, reconstructing the interference signal, iteratively enhancing and other methods, so as to achieve the coexistence of the LTE uplink signal and the Wi-Fi signal in the terminal, and the deterioration of the Wi-Fi system performance can be better avoided without sacrificing spectrum resources. Different from the anti-interference method of FDM, the LTE uplink interference signal is eliminated by identifying the LTE uplink interference signal, reconstructing the interference signal, and iteratively enhancing, without moving the working channel of the non-interference signal. Different from the anti-interference method of TDM, the Wi-Fi signal is continuously received, and there is no need to receive the Wi-Fi signal and the LTE uplink interference signal in different time periods. Different from the anti-interference method of power control, the Wi-Fi signal is received on the premise that the LTE uplink interference signal power meets the standard, and there is no need to restrict the LTE uplink interference signal power more than the standard. Different from the method of automatically shutting down the interference source of the terminal, the Wi-Fi signal is received normally, and there is no need to shut down the interference channel adjacent to the Wi-Fi signal. This can avoid problems such as Wi-Fi user service interruption, service rate reduction, and Wi-Fi system coverage performance degradation.

[0145] Example 2

[0146] Taking the example of sending 2.4GHz Wi-Fi signals in the terminal to interfere with LTE Band40 (2.3-2.4GHz) frequency band signals, the specific process of eliminating Wi-Fi interference in the LTE system is described in detail. Figure 7 The terminal includes the following modules: LTE module and Wi-Fi module.

[0147] The LTE module includes: an LTE downlink signal detection module, a Wi-Fi signal identification module, a Wi-Fi signal reconstruction module, an LTE downlink signal reconstruction module, a first combining module and a second combining module. The LTE module may correspond to the first antenna module in the above embodiment, the Wi-Fi signal identification module may correspond to the interference signal identification module, the Wi-Fi signal reconstruction module may correspond to the interference signal reconstruction module, and the LTE downlink signal reconstruction module may correspond to the non-interference signal reconstruction module. Figure 7 The dotted line in indicates that the LTE module can also transmit information irrelevant to the reconstruction with the Wi-Fi module.

[0148] based on Figure 7 The present application also provides an interference elimination method, such as Figure 8 As shown, the interference elimination method process provided in the embodiment of the present application is as follows.

[0149] Step 801: The LTE module of the terminal receives a first signal, wherein the first signal may include: a Wi-Fi interference signal and an LTE downlink signal.

[0150] Step 802: The LTE module determines whether interference cancellation is required based on the working channel of the LTE downlink signal. If yes, execute step 803; if no, execute step 8012.

[0151] In a possible implementation, the LTE downlink signal detection module in the LTE module can determine whether there may be interference according to the frequency band of the first signal, thereby determining whether to perform interference elimination. For example, if it is determined that the first signal is near 2.4 GHz, it is determined that there may be interference with the first signal.

[0152] In another possible implementation, the LTE downlink signal detection module in the LTE module may determine whether to perform interference elimination based on whether the CRC corresponding to the LTE downlink signal in the first signal is correct.

[0153] Step 803: The LTE downlink signal detection module in the LTE module determines whether the interference signal in the first signal is heterogeneous system interference according to the central frequency of the interference signal in the first signal. If so, execute step 804; if not, execute step 8012. The specific process and principle can refer to step 603, which will not be described in detail here.

[0154] Step 804: The LTE downlink signal detection module determines whether the CRC corresponding to the LTE downlink signal is correct according to the obtained first signal. If so, step 8012 is executed; if not, step 805 is executed;

[0155] Optionally, the LTE downlink signal detection module determines whether the number of iterations in the interference elimination process of the Wi-Fi signal reaches a preset threshold. If so, the interference elimination of the LTE downlink signal is stopped and step 8012 is executed. If not, the result of step 804 is executed.

[0156] Step 805: The LTE downlink signal detection module determines whether the signal strength of the LTE downlink signal in the first signal is greater than the signal strength of the Wi-Fi signal through the received first signal; if so, execute step 806b; otherwise, execute step 806a;

[0157] Step 806a: The LTE downlink signal reconstruction module reconstructs the LTE downlink signal according to the parameters of the LTE downlink signal in the first signal, and transmits the reconstructed LTE downlink signal to the second combining module.

[0158] Step 807a: The second combining module obtains a third signal according to the reconstructed LTE downlink signal and the first signal, and transmits the third signal to the interference signal identification module, wherein the third signal is a signal obtained by eliminating the reconstructed non-interference signal from the first signal.

[0159] Step 808a: The Wi-Fi signal identification module identifies the parameters of the Wi-Fi signal in the third signal. The method by which the interference signal identification module identifies the parameters of the Wi-Fi signal in the third signal can refer to the method by which the interference signal identification module identifies the parameters of the Wi-Fi signal in the first signal, which will not be repeated here.

[0160] Step 806b: The Wi-Fi signal identification module estimates and / or identifies parameters of the Wi-Fi signal in the first signal, and sends the estimated parameters of the Wi-Fi signal to the Wi-Fi signal reconstruction module.

[0161] Step 809: The Wi-Fi signal reconstruction module reconstructs the Wi-Fi signal in the first signal according to the parameters of the Wi-Fi signal, and sends it to the first combining module.

[0162] Step 8010: The first combining module determines the second signal according to the first signal and the reconstructed Wi-Fi signal.

[0163] Step 8011: The first combining module updates the first signal through the second signal, and returns to step 804.

[0164] Step 8012: The LTE module performs data detection on the obtained first signal to obtain data in the LTE downlink signal in the first signal.

[0165] Through the above method, in the scenario where the Wi-Fi signal interferes with the reception of LTE Band 40, the Wi-Fi interference signal is identified and reconstructed, and the Wi-Fi interference signal is eliminated in an iterative manner, thereby ensuring the performance of the LTE system and avoiding problems such as service rate reduction and service interruption in the LTE system. In this scenario, the Wi-Fi module does not need to send relevant information to the LTE module, and the Wi-Fi signal identification module completes the identification and estimation of all parameters of the Wi-Fi interference signal, and finally completes the reconstruction and elimination of the Wi-Fi interference signal.

[0166] The present application also provides a communication device, please refer to Fig. 9 , is a schematic diagram of the structure of an interference elimination device provided in an embodiment of the present application, the interference elimination device 900 includes: a memory 910 and a processor 920; the memory 910 stores computer program instructions; the processor 920 calls the computer program instructions stored in the memory and executes Figure 4b , Figure 6 or Figure 8 The method embodiments shown in the figure correspond to the operations or steps of the terminal device. The interference elimination device can be used to implement the functions of the terminal device involved in any of the above method embodiments. For example, the interference elimination device can be a terminal device, such as a handheld terminal device or a vehicle-mounted terminal device; the interference elimination device can also be a chip or circuit included in the terminal device, or a device including the terminal device, such as various types of vehicles. The interference elimination device can be used to implement the functions of the terminal device involved in any of the above method embodiments. For example, the interference elimination device can be a terminal device or a chip or circuit included in the terminal device.

[0167] Exemplarily, when the interference elimination device executes Figure 4b , Figure 6 or Figure 8 In the method embodiment shown in , when the operation or step of the terminal device corresponds to the operation or step of the terminal device, a first signal is received through the first antenna; when it is determined that the first signal includes an interference signal and the interference signal is a signal of a communication protocol supported by the second antenna, the parameters of the interference signal are estimated according to the first signal to obtain the parameters of the interference signal; the interference signal is reconstructed according to the parameters of the interference signal; the interference of the first signal is eliminated by the reconstructed interference signal to generate a second signal.

[0168] In a possible implementation, the interference elimination device is used to determine, based on a center frequency of the interference signal, that the interference signal is a signal of a communication protocol supported by the second antenna.

[0169] In a possible implementation, the interference elimination device 900, before estimating the parameters of the interference signal according to the first signal, is further used to: determine that the signal strength of the non-interference signal of the first signal is less than or equal to the signal strength of the interference signal.

[0170] In one possible implementation, the interference elimination device 900, before estimating the parameters of the interference signal based on the first signal, is also used to: reconstruct the non-interference signal based on the parameters of the non-interference signal when the signal strength of the non-interference signal of the first signal is greater than the signal strength of the interference signal; and estimate the parameters of the interference signal through the reconstructed non-interference signal and the first signal.

[0171] In a possible implementation, the interference elimination device 900 is further used to: determine that the CRC corresponding to the non-interference signal is incorrect; and determine that the number of CRC operations on the non-interference signal is less than a preset threshold before reconstructing the non-interference signal based on the parameters of the non-interference signal.

[0172] In a possible implementation, the interference elimination device 900 is further used to: when the CRC corresponding to the non-interference signal in the second signal is correct, determine that the second signal is a signal after interference elimination.

[0173] In a possible implementation, the interference elimination device 900 is further used to: if it is determined that the second signal is a signal whose interference has not been eliminated, update the first signal by using the second signal, and eliminate interference on the updated first signal.

[0174] In a possible implementation, the interference elimination device 900 is specifically used to: determine that the CRC corresponding to the non-interference signal is incorrect; and determine that the number of times the CRC is performed on the non-interference signal is less than a preset threshold.

[0175] In a possible implementation method, the parameters of the interference signal of the first signal or the second signal include at least one of the following: modulation parameters, bandwidth parameters, channel parameters, noise power parameters, coding parameters, timing deviation parameters, frequency deviation parameters, and network parameters of the network to which the second antenna is connected.

[0176] Alternatively, the non-interference signal parameters of the first signal include at least one of the following: modulation parameters, bandwidth parameters, channel parameters, noise power parameters, coding parameters, timing deviation parameters, frequency deviation parameters, and network parameters of the network to which the first antenna is connected.

[0177] In a possible implementation manner, network parameters of the network accessed by the second antenna are obtained through the second antenna.

[0178] In a possible implementation manner, the network parameter of the network accessed by the first antenna and / or the second antenna includes at least one of the following: a cell identifier and an RNTI.

[0179] The processor 920 involved in the interference elimination device 900 can be implemented by at least one processor or processor-related circuit components. The interference elimination device can also include at least one transceiver or transceiver-related circuit components or communication interfaces to implement transceiver functions. The operations and / or functions of each module in the interference elimination device are respectively to implement Figure 4a to Figure 4b , Figure 6 or Figure 8For the sake of brevity, the corresponding process of the method shown in is not repeated here. Optionally, the memory 910 in the interference elimination device can be used to store data and / or instructions, and the transceiver module and / or processor 920 can read the data and / or instructions in the access module, so that the interference elimination device implements the corresponding method. The memory can be implemented by at least one memory, for example. The above-mentioned memory, processor and transceiver module can exist separately, or all or part of the modules can be integrated, such as the memory and processor are integrated, or the processor and transceiver module are integrated, etc.

[0180] Please refer to Fig.10 , is another structural diagram of a communication device provided in an embodiment of the present application. The communication device may be a terminal device, which can be used to implement the functions of the terminal device involved in any of the above method embodiments. For example, it includes a first antenna, a second antenna and the interference elimination device in the above embodiment. For ease of understanding and illustration, Fig.10 In this article, a mobile phone is used as an example of a terminal device. Fig.10 As shown, the terminal device includes a processor and may also include a memory. Of course, it may also include a radio frequency circuit, an antenna, and input and output devices. The processor is mainly used to process communication protocols and communication data, as well as to control the terminal device, execute software programs, and process software program data. The memory is mainly used to store software programs and data. The radio frequency circuit is mainly used for converting baseband signals and radio frequency signals and processing radio frequency signals. The antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal devices may not have input and output devices.

[0181] When data needs to be sent, the processor performs baseband processing on the data to be sent and outputs the baseband signal to the RF circuit. The RF circuit performs RF processing on the baseband signal and then sends the RF signal outward in the form of electromagnetic waves through the antenna. When data is sent to the terminal device, the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor. The processor converts the baseband signal into data and processes the data.

[0182] A possible implementation method is to receive a first signal through the first antenna; when it is determined that the first signal includes an interference signal and the interference signal is a signal of a communication protocol supported by the second antenna, estimate parameters of the interference signal based on the first signal to obtain the parameters of the interference signal; reconstruct the interference signal based on the parameters of the interference signal; and eliminate interference with the first signal through the reconstructed interference signal to generate a second signal.

[0183] For ease of explanation, Fig.10 Only one memory and processor are shown. In an actual terminal product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or a storage device. The memory may be set independently of the processor or may be integrated with the processor, which is not limited in the embodiments of the present application.

[0184] In the embodiments of the present application, the antenna and the radio frequency circuit having transceiver functions may be regarded as the transceiver unit of the terminal device, and the processor having the processing function may be regarded as the processing unit of the terminal device. Fig.10 As shown, the terminal device includes a transceiver unit 1010 and a processing unit 1020. The transceiver unit may also be referred to as a transceiver, a transceiver, a transceiver device, etc. The processing unit may also be referred to as a processor, a processing board, a processor, a processing device, etc. Optionally, the device used to implement the receiving function in the transceiver unit 1010 may be regarded as a receiving unit, and the device used to implement the sending function in the transceiver unit 1010 may be regarded as a sending unit, that is, the transceiver unit 1010 includes a receiving unit and a sending unit. The transceiver unit may sometimes also be referred to as a transceiver, a transceiver, or a transceiver circuit, etc. The receiving unit may sometimes also be referred to as a receiver, a receiver, or a receiving circuit, etc. The sending unit may sometimes also be referred to as a transmitter, a transmitter, or a transmitting circuit, etc. It should be understood that the transceiver unit 1010 is used to perform the sending operation and the receiving operation on the terminal side in the above method embodiment, and the processing unit 1020 is used to perform other operations on the terminal in addition to the sending operation in the above method embodiment.

[0185] An embodiment of the present application also provides a chip system, including: a processor, the processor is coupled to a memory, the memory is used to store programs or instructions, when the program or instructions are executed by the processor, the chip system implements the method of the corresponding terminal device or the method of the corresponding network device in any of the above method embodiments.

[0186] Optionally, the processor in the chip system may be one or more. The processor may be implemented by hardware or by software. When implemented by hardware, the processor may be a logic circuit, an integrated circuit, etc. When implemented by software, the processor may be a general-purpose processor implemented by reading software code stored in a memory.

[0187] Optionally, the memory in the chip system may be one or more. The memory may be integrated with the processor or may be separately provided with the processor, which is not limited in the present application. Exemplarily, the memory may be a non-transient processor, such as a read-only memory ROM, which may be integrated with the processor on the same chip or may be provided on different chips. The present application does not specifically limit the type of memory and the arrangement of the memory and the processor.

[0188] Exemplarily, the chip system can be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), a central processor unit (CPU), a network processor (NP), a digital signal processor (DSP), a microcontroller unit (MCU), a programmable logic device (PLD) or other integrated chips.

[0189] It should be understood that each step in the above method embodiment can be completed by an integrated logic circuit of hardware in a processor or by instructions in the form of software. The method steps disclosed in the embodiments of the present application can be directly embodied as being executed by a hardware processor, or by a combination of hardware and software modules in a processor.

[0190] An embodiment of the present application further provides a computer-readable storage medium, in which computer-readable instructions are stored. When a computer reads and executes the computer-readable instructions, the computer executes a method in any of the above method embodiments.

[0191] The embodiment of the present application also provides a computer program product. When a computer reads and executes the computer program product, the computer executes the method in any of the above method embodiments.

[0192] The embodiment of the present application further provides a communication system, the communication system comprising a network device and at least one terminal device. Optionally, the communication system may further comprise a core network device.

[0193] It should be understood that the processor mentioned in the embodiments of the present application may be a CPU, or other general-purpose processors, DSPs, ASICs, FPGAs or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0194] It should also be understood that the memory mentioned in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory, an erasable programmable read-only memory, an electrically erasable programmable read-only memory, or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static random access memory, dynamic random access memory, synchronous dynamic random access memory, double data rate synchronous dynamic random access memory, enhanced synchronous dynamic random access memory, synchronously connected dynamic random access memory, and direct memory bus random access memory.

[0195] It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, the memory (storage module) is integrated in the processor.

[0196] It should be noted that the memory described herein is intended to include, without being limited to, these and any other suitable types of memory.

[0197] It should be understood that the various digital numbers involved in the various embodiments of the present application are only distinguished for the convenience of description, and the size of the serial numbers of the above-mentioned processes or steps does not mean the order of execution. The execution order of each process or step should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0198] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0199] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0200] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0201] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0202] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0203] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard drives, ROM, RAM, magnetic disks, or optical disks.

[0204] In the various embodiments of the present application, unless otherwise specified or provided in a logical conflict, the terms and / or descriptions between the different embodiments are consistent and may be referenced to each other, and the technical features in the different embodiments may be combined to form new embodiments according to their inherent logical relationships.

Claims

1. An interference elimination method, characterized in that: Applied to a terminal, the terminal includes a first antenna and a second antenna, the first antenna and the second antenna support different communication protocols; the method includes: receiving a first signal via the first antenna; When it is determined that the first signal includes an interference signal and the interference signal is a signal of a communication protocol supported by the second antenna, if the signal strength of the non-interference signal of the first signal is less than or equal to the signal strength of the interference signal of the first signal, then according to the first signal, the parameters of the interference signal are estimated to obtain the parameters of the interference signal; or, if the signal strength of the non-interference signal of the first signal is greater than the signal strength of the interference signal of the first signal, then according to the parameters of the non-interference signal, the non-interference signal is reconstructed, and the parameters of the interference signal are estimated according to the reconstructed non-interference signal and the first signal to obtain the parameters of the interference signal; Reconstructing the interference signal according to the parameters of the interference signal; The first signal is subjected to interference cancellation by using the reconstructed interference signal to generate a second signal.

2. The method according to claim 1, characterized in that The determining that the interference signal is a signal of a communication protocol supported by the second antenna includes: The interference signal is determined to be a signal of a communication protocol supported by the second antenna according to a central frequency point of the interference signal.

3. The method according to claim 1, characterized in that Before reconstructing the non-interference signal according to the parameter of the non-interference signal, the method further includes: Determining that a cyclic redundancy check CRC corresponding to the non-interference signal is incorrect; It is determined that the number of CRC operations performed on the non-interference signal is less than a preset threshold.

4. The method according to any one of claims 1 to 3, characterized in that: The method further comprises: When the CRC corresponding to the non-interference signal in the second signal is correct, it is determined that the second signal is a signal after interference elimination.

5. The method according to claim 4, characterized in that Also includes: If it is determined that the second signal is a signal whose interference has not been eliminated, the CRC updates the first signal through the second signal and eliminates interference on the updated first signal.

6. The method according to claim 5, characterized in that The determining that the second signal is a signal whose interference has not been eliminated includes: Determining that the CRC corresponding to the non-interference signal is incorrect; It is determined that the number of times the CRC is performed on the non-interference signal is less than a preset threshold.

7. The method according to any one of claims 1 to 3, characterized in that: The parameter of the interference signal of the first signal or the second signal includes at least one of the following: modulation parameters, bandwidth parameters, channel parameters, noise power parameters, coding parameters, timing deviation parameters, frequency deviation parameters, and network parameters of the network to which the second antenna is connected; Alternatively, the parameter of the non-interference signal of the first signal includes at least one of the following: Modulation parameters, bandwidth parameters, channel parameters, noise power parameters, coding parameters, timing deviation parameters, frequency deviation parameters, and network parameters of the network to which the first antenna is connected.

8. The method according to claim 7, characterized in that The network parameters of the network accessed by the second antenna are obtained through the second antenna.

9. The method according to claim 7, characterized in that The network parameter of the network accessed by the first antenna and / or the second antenna includes at least one of the following: Cell ID, radio network ID RNTI.

10. An interference elimination device, characterized in that: Applied to a terminal, the terminal comprising a first antenna and a second antenna, the first antenna and the second antenna supporting different communication protocols; The device includes a memory and a processor; The memory stores computer program instructions; The processor calls and executes the computer program instructions stored in the memory, so that the following steps are implemented: receiving a first signal via the first antenna; When it is determined that the first signal includes an interference signal and the interference signal is a signal of a communication protocol supported by the second antenna, if the signal strength of the non-interference signal of the first signal is less than or equal to the signal strength of the interference signal of the first signal, then according to the first signal, the parameters of the interference signal are estimated to obtain the parameters of the interference signal; or, if the signal strength of the non-interference signal of the first signal is greater than the signal strength of the interference signal of the first signal, then according to the parameters of the non-interference signal, the non-interference signal is reconstructed, and the parameters of the interference signal are estimated according to the reconstructed non-interference signal and the first signal to obtain the parameters of the interference signal; Reconstructing the interference signal according to the parameters of the interference signal; The first signal is subjected to interference cancellation by using the reconstructed interference signal to generate a second signal.

11. The device according to claim 10, characterized in that The determining that the interference signal is a signal of a communication protocol supported by the second antenna includes: The interference signal is determined to be a signal of a communication protocol supported by the second antenna according to a central frequency point of the interference signal.

12. The device according to claim 10, characterized in that Before reconstructing the non-interference signal according to the parameters of the non-interference signal, the method further comprises the steps of: Determining that the CRC corresponding to the non-interference signal is incorrect; It is determined that the number of times the CRC is performed on the non-interference signal is less than a preset threshold.

13. The device according to any one of claims 10 to 12, characterized in that: Also includes the steps: When the CRC corresponding to the non-interference signal in the second signal is correct, it is determined that the second signal is a signal after interference elimination.

14. The device according to claim 13, characterized in that Also includes the steps: If it is determined that the second signal is a signal whose interference has not been eliminated, the first signal is updated by the second signal, and interference elimination is performed on the updated first signal.

15. The device according to claim 14, characterized in that The determining that the second signal is a signal whose interference has not been eliminated includes: Determining that the CRC corresponding to the non-interference signal is incorrect; It is determined that the number of times the CRC is performed on the non-interference signal is less than a preset threshold.

16. The device according to any one of claims 10 to 12, characterized in that: The parameter of the interference signal of the first signal or the second signal includes at least one of the following: modulation parameters, bandwidth parameters, channel parameters, noise power parameters, coding parameters, timing deviation parameters, frequency deviation parameters, and network parameters of the network to which the second antenna is connected; Alternatively, the parameter of the non-interference signal of the first signal includes at least one of the following: Modulation parameters, bandwidth parameters, channel parameters, noise power parameters, coding parameters, timing deviation parameters, frequency deviation parameters, and network parameters of the network to which the first antenna is connected.

17. The device according to claim 16, characterized in that The network parameters of the network accessed by the second antenna are obtained through the second antenna.

18. The device according to claim 16, characterized in that The network parameter of the network accessed by the first antenna and / or the second antenna includes at least one of the following: Cell ID, radio network ID RNTI.

19. A terminal device, characterized in that: The invention comprises a first antenna and a second antenna, wherein the first antenna and the second antenna support different communication protocols; and further comprises an interference elimination device as claimed in any one of claims 10 to 18.

20. A computer-readable storage medium, characterized in that: The invention comprises a computer program, which, when being run on a computer, enables the computer to execute the method according to any one of claims 1 to 9.

21. A chip, characterized in that: The method comprises a processor and a communication interface, wherein the processor is used to read instructions through the communication interface to execute the method according to any one of claims 1 to 9.

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