Interference estimation method and electronic device

Abstract

The present application discloses an interference estimation method and electronic device, which relates to the field of wireless communication and is used to estimate the interference of a broadband interference signal to a narrowband communication. The interference estimation method includes: measuring the anti-interference selectivity of a narrowband receiver to a narrowband interference signal; normalizing the anti-interference selectivity of the narrowband receiver to the narrowband interference signal to obtain the normalized anti-interference selectivity of the narrowband receiver; obtaining the power of the broadband interference signal according to the power spectrum density of the broadband interference signal; obtaining the power of the broadband interference signal equivalently received by the narrowband receiver according to the power spectrum density of the broadband interference signal and the normalized anti-interference selectivity of the narrowband receiver; obtaining the anti-interference selectivity of the narrowband receiver to the broadband interference signal according to the anti-interference selectivity of the center frequency of the narrowband useful signal, the power of the broadband interference signal, and the power of the broadband interference signal equivalently received by the narrowband receiver.

Description

Technical Field

[0001] The present application relates to the field of wireless communications, and in particular to an interference estimation method and electronic equipment. Background Art

[0002] If broadband communication (such as wireless fidelity (Wi-Fi) communication) and narrowband communication (such as Bluetooth (BT) communication) share the same frequency band (such as the 2.4G band), the broadband interference signal (the frequency component of the broadband signal) will fall into the frequency range of the narrowband communication. Therefore, for some frequency points of the narrowband communication, the broadband interference signal cannot be filtered out by means of RF filters, etc., which will cause the performance of these frequency points to degrade or even make these frequency points unusable. Summary of the invention

[0003] Embodiments of the present application provide an interference estimation method and an electronic device for estimating interference caused by a broadband interference signal to narrowband communication.

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

[0005] In a first aspect, a method for estimating interference is provided, comprising: measuring the anti-interference selectivity of a narrowband receiver to a narrowband interference signal; normalizing the anti-interference selectivity of the narrowband receiver to the narrowband interference signal according to the anti-interference selectivity of the center frequency of a narrowband useful signal to obtain the normalized anti-interference selectivity of the narrowband receiver; obtaining the power of the broadband interference signal according to the power spectral density of the broadband interference signal; obtaining the power of the broadband interference signal equivalently received by the narrowband receiver according to the power spectral density of the broadband interference signal and the normalized anti-interference selectivity of the narrowband receiver; obtaining the anti-interference selectivity of the narrowband receiver to the broadband interference signal according to the anti-interference selectivity of the center frequency of the narrowband useful signal, the power of the broadband interference signal equivalently received by the narrowband receiver, and the power of the broadband interference signal.

[0006] The interference estimation method provided in the embodiment of the present application can convert the power of the broadband interference signal into the power of the narrowband interference signal equivalently received by the narrowband receiver in narrowband communication, based on the power spectral density of the broadband interference signal and the normalized anti-interference selectivity of the narrowband receiver. The power is affected by the following factors: whether the frequency range of the broadband interference signal includes the center frequency of the narrowband useful signal, and the PSD of the broadband interference signal at the center frequency of the narrowband useful signal. In combination with the power of the broadband interference signal, the power of the broadband interference signal equivalently received by the narrowband receiver is corrected, and the main factors affecting the power size of the narrowband interference signal equivalently received by the narrowband receiver as mentioned above are retained. The anti-interference selectivity of the narrowband receiver to the broadband interference signal reflects the interference intensity of the broadband interference signal to the narrowband useful signal, so it can be used to estimate the interference of the broadband interference signal to the narrowband communication.

[0007] In a possible implementation, the anti-interference selectivity of the narrowband receiver to the narrowband interference signal is normalized according to the anti-interference selectivity of the center frequency of the narrowband useful signal to obtain the normalized anti-interference selectivity of the narrowband receiver, including: at each frequency f, the anti-interference selectivity C / I(f) of the narrowband receiver to the narrowband interference signal is subtracted from the anti-interference selectivity C / I(fc) of the center frequency of the narrowband useful signal to obtain the normalized anti-interference selectivity A(f) of the narrowband receiver. Since the anti-interference selectivity C / I(fc) of the center frequency of the narrowband useful signal is not necessarily 0 for different narrowband receivers, and may also be a negative number or a positive number, in order to facilitate the unification of different narrowband receivers, at each frequency f, the anti-interference selectivity C / I(f) of the narrowband receiver to the narrowband interference signal within the first frequency range can be subtracted from the anti-interference selectivity C / I(fc) of the center frequency of the narrowband useful signal to obtain the normalized anti-interference selectivity A(f) of the narrowband receiver within the first frequency range.

[0008] In a possible implementation, the power of the broadband interference signal is obtained according to the power spectral density of the broadband interference signal, including: integrating the power spectral density of the broadband interference signal to obtain the power of the broadband interference signal. The PSD of the broadband interference signal at different frequencies is different, and the interference intensity to the narrowband signal is also different. The power of the broadband interference signal at a single frequency cannot be used to describe the interference intensity of the broadband interference signal within the second frequency range. Instead, the power obtained by integrating the PSD of the broadband interference signal is used to describe the interference intensity of the broadband interference signal within the second frequency range.

[0009] In a possible implementation, according to the power spectral density of the broadband interference signal and the normalized anti-interference selectivity of the narrowband receiver, the power of the broadband interference signal equivalently received by the narrowband receiver is obtained, including: the power of the narrowband interference signal equivalent to the broadband interference signal , f is the frequency, PSD(f) is the power spectral density of the broadband interference signal, A(f) is the normalized anti-interference selectivity of the narrowband receiver, f_low is the minimum value of the frequency range of the broadband interference signal, and f_hi is the maximum value of the frequency range of the broadband interference signal. PSD(f)-A(f) at each frequency means converting the PSD of the broadband interference signal into the PSD of the equivalent narrowband interference signal, and then integrating it within the second frequency range to obtain the power Pequal of the narrowband interference signal equivalent to the broadband interference signal in the second frequency range.

[0010] In a possible implementation, based on the anti-interference selectivity of the center frequency of the narrowband useful signal, the power of the broadband interference signal, and the power of the broadband interference signal equivalently received by the narrowband receiver, the anti-interference selectivity of the narrowband receiver to the broadband interference signal is obtained, including: the anti-interference selectivity of the narrowband receiver to the broadband interference signal C / Iwb=C / I(fc)+Pequal-Pi, Pequal is the power of the narrowband interference signal equivalent to the broadband interference signal, Pi is the power of the broadband interference signal, and C / I(fc) is the anti-interference selectivity of the center frequency of the narrowband useful signal. Pequal-Pi is equivalent to removing the influencing factors of the power of the broadband interference signal, correcting the power Pequal of the broadband interference signal equivalently received by the narrowband receiver, and retaining the main factors affecting the size of Pequal as mentioned above. C / I(fc)+Pequal-Pi reflects the interference intensity of the broadband interference signal to the narrowband useful signal. The frequency range of the broadband interference signal includes the center frequency fc of the narrowband useful signal, and the larger the PSD of the broadband interference signal at the center frequency fc of the narrowband useful signal, the larger the Pequal-Pi, and accordingly, the larger the C / Iwb, the greater the interference intensity of the broadband interference signal to the narrowband communication, so C / Iwb can be used as an ACS indicator.

[0011] In a possible implementation, the method further includes: obtaining the PSD of the broadband interference signal of the entire bandwidth through a broadband receiver; and selecting the frequency hopping point of the narrowband communication according to the anti-interference selectivity of the narrowband receiver to the broadband interference signal from small to large. The frequency point with large in-band interference can be avoided, thereby improving the communication quality of the narrowband communication.

[0012] In a possible implementation, it also includes: obtaining the PSD of the broadband interference signal of the entire bandwidth in different scenarios through a broadband receiver, extracting features of the PSD of the broadband interference signal of the entire bandwidth in different scenarios, obtaining a first PSD feature, and binding the first PSD feature in each scenario to the frequency hopping frequency point preferentially selected in the scenario. Obtaining the PSD of the broadband interference signal of the current scenario through a broadband receiver, extracting features of the PSD of the broadband interference signal of the current scenario, obtaining a second PSD feature, and matching the second PSD feature with the first PSD feature, thereby determining the frequency hopping frequency point preferentially selected for narrowband communication in the current scenario. Frequency points with large in-band interference can be avoided, thereby improving the communication quality of narrowband communication.

[0013] In a second aspect, an electronic device is provided, including a processor and a memory, wherein instructions are stored in the memory, and when the processor executes the instructions, the electronic device executes the method described in the first aspect and any embodiment thereof.

[0014] According to a third aspect, a computer-readable storage medium is provided, comprising instructions, which, when executed on an electronic device, enable the electronic device to execute the method according to the first aspect and any embodiment thereof.

[0015] In a fourth aspect, a computer program product comprising instructions is provided. When the instructions are executed on the electronic device, the electronic device executes the method as described in the first aspect and any embodiment thereof.

[0016] The technical effects of the second to fourth aspects refer to the technical effects of the first aspect and any of its embodiments, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0018] Figure 2 A schematic diagram of a software architecture of an electronic device provided in an embodiment of the present application;

[0019] Figure 3 A schematic diagram of a narrowband communication function being turned on provided in an embodiment of the present application;

[0020] Figure 4 A flowchart of an interference estimation method provided in an embodiment of the present application;

[0021] Figure 5 A schematic diagram of the anti-interference selectivity of a narrowband receiver to a narrowband interference signal provided in an embodiment of the present application;

[0022] Figure 6 A schematic diagram of an intermediate result provided in an embodiment of the present application;

[0023] Figure 7 A schematic diagram of another intermediate result provided in an embodiment of the present application;

[0024] Figure 8 A schematic diagram of interference intensity of a broadband interference signal provided in an embodiment of the present application;

[0025] Fig. 9 A schematic diagram of the interference intensity of another broadband interference signal provided in an embodiment of the present application. DETAILED DESCRIPTION

[0026] First, some concepts involved in this application are described.

[0027] The terms "first", "second", etc. involved in the embodiments of the present application are only used to distinguish features of the same type and cannot be understood as indicating relative importance, quantity, order, etc.

[0028] The terms "exemplary" or "for example" and the like in the embodiments of the present application are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of the terms "exemplary" or "for example" is intended to present the related concepts in a specific way.

[0029] The terms "coupling" and "connection" involved in the embodiments of the present application should be understood in a broad sense. For example, they may refer to a direct physical connection, or an indirect connection achieved through electronic devices, such as a connection achieved through resistors, inductors, capacitors or other electronic devices.

[0030] In the field of wireless communications, electromagnetic interference affects communication performance and user experience. According to the relationship between the frequency band of the useful signal and the frequency band of the interference signal, the interference signal can be divided into out-of-band interference signal and in-band interference signal. Out-of-band interference refers to the interference signal and the useful signal have different frequency bands, and in-band interference refers to the interference signal and the useful signal have the same frequency band. If broadband communication (such as Wi-Fi communication) and narrowband communication (such as BT communication) share a frequency band (such as 2.4G frequency band), since the broadband interference signal (the frequency component of the broadband signal) will fall into the frequency range of the narrowband communication, for certain frequency points of the narrowband communication, the broadband interference signal becomes an in-band interference signal of the narrowband communication. It should be noted that the embodiment of the present application takes the narrowband signal as a Bluetooth communication signal and the broadband signal as a Wi-Fi communication signal as an example, but it is not intended to be limited to this.

[0031] Out-of-band interference signals can usually be suppressed using RF filters, but in-band interference signals cannot be filtered out by RF filters because they are in the same frequency band (or even the same frequency point) as the useful signal, which will cause the performance of certain frequencies of narrowband communication to degrade or even make these frequencies unusable. This problem is particularly serious in unlicensed frequency bands because there is no coordination mechanism between electronic devices to avoid mutual interference.

[0032] Although the Bluetooth communication protocol introduces an automatic frequency selection mechanism and uses frequency hopping technology to avoid fixed frequencies from being continuously interfered with in the band, in densely communicating scenarios such as offices, shopping malls, airports, and train stations, the interference of broadband interference signals to narrowband communications is inevitable.

[0033] In the prior art, adjacent channels selectivity (ACS) is usually used to indicate the anti-interference reception capability of a receiver on a specified channel (or frequency point). The ACS indicator is expressed by the ratio of the power of the useful signal to the power of the interference signal (i.e., the carrier-to-interference ratio C / I). The interference of broadband interference signals to narrowband communications can also be expressed by the ACS indicator, but the distribution of broadband interference signals is usually a frequency power spectrum density curve related to the scene, time, and location. In the process of measuring broadband interference signals, these factors need to be constantly adjusted, which makes the measurement process very complicated.

[0034] To this end, an embodiment of the present application provides an interference estimation method and an electronic device, wherein the power of a broadband interference signal is converted into the power of an equivalent narrowband interference signal in narrowband communication, and the power of the equivalent narrowband interference signal is affected by the following factors: the distance between the center frequency of the broadband interference signal and the center frequency of the narrowband useful signal, and the power of the broadband interference signal. Combined with the power of the equivalent narrowband interference signal and the power of the broadband interference signal, the anti-interference selectivity of the center frequency of the narrowband useful signal is compensated to obtain the anti-interference selectivity of the narrowband receiver to the broadband interference signal. The magnitude of the anti-interference selectivity is not only related to the distance between the center frequency of the broadband interference signal and the center frequency of the narrowband useful signal, but also to the power of the broadband interference signal, reflecting the degree of interference of the broadband interference signal on the narrowband useful signal, so it can be used to estimate the interference of the broadband interference signal on the narrowband communication.

[0035] First, an embodiment of the present application provides an electronic device, which is an electronic device with a wireless communication function. The electronic device can be mobile or fixed. The electronic device can be deployed on land (for example, indoors or outdoors, handheld or vehicle-mounted, etc.), on the water (for example, ships, etc.), or in the air (for example, airplanes, balloons, and satellites, etc.). The electronic device can be called user equipment (UE), access terminal, terminal unit, subscriber unit, terminal station, mobile station (MS), mobile station, terminal agent or terminal device, etc. For example, the electronic device can be a mobile phone, a tablet computer, a laptop computer, a smart bracelet, a smart screen, a smart watch, a virtual reality (VR) device, an augmented reality (AR) device, a terminal in industrial control, a terminal in self-driving, a terminal in remote medical, a terminal in smart grid, a terminal in transportation safety, a terminal in smart city, a terminal in smart home, etc. The embodiments of the present application do not limit the specific type and structure of the electronic device. A possible structure of the electronic device is described below.

[0036] like Figure 1 As shown, the electronic device 100 includes a processor 101, a memory 102, a broadband receiver 103 (e.g., a Wi-Fi communication chip), a narrowband receiver 104 (e.g., a Bluetooth communication chip), a radio frequency front end module (RFEM) 105, and at least one antenna 106. The processor 101 is connected to the memory 102, the broadband receiver 103, and the narrowband receiver 104, and the RF front end module 105 is connected to the broadband receiver 103, the narrowband receiver 104, and the antenna 106.

[0037] The broadband receiver 103 is used to implement broadband communication (such as Wi-Fi communication). The narrowband receiver 104 is used to implement narrowband communication (such as Bluetooth communication). The RF front-end module 105 includes devices such as a power amplifier (PA), a low noise amplifier (LNA), and a duplexer. The PA is used to amplify the power of the transmitted RF signal. The LNA is used to amplify the power of the received RF signal. The duplexer is used to implement time-sharing multiplexing of the transmitting channel and the receiving channel with the antenna 106. The broadband receiver 103 and the narrowband receiver 104 can use the duplexer to time-sharing multiplex the antenna 106, or they can occupy the antenna 106 independently.

[0038] The processor 101 may be a chip, for example, 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 micro controller unit (MCU), a programmable logic device (PLD), or other integrated chips.

[0039] The memory 102 may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories. Among them, the nonvolatile memory may be a read-only memory (ROM), a programmable ROM (PROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), 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 RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM) and direct RAM bus RAM (DRRAM). It should be noted that the memory of the system and method described herein is intended to include but is not limited to these and any other suitable types of memory. The processor 101 executes the interference estimation method provided in the embodiment of the present application by executing the program and computer instructions stored in the memory 102. It should be noted that the interference estimation method provided in the embodiment of the present application can also be executed by a separate control chip to execute the program and computer instructions stored in the memory 102, and the present application is not limited thereto.

[0040] like Figure 2 As shown, taking an electronic device running the Android® operating system as an example, the software architecture running on the processor includes an application layer, a framework layer, a system runtime layer, a hardware abstract layer (HAL) layer, and a kernel layer.

[0041] The kernel layer is the bottom layer of the Android® operating system, based on the Linux® kernel. It is responsible for providing basic system services, such as security, memory management, process management, network stack, and drivers. Exemplarily, the kernel layer includes a broadband communication driver and a narrowband communication driver. The broadband communication driver is used to drive a broadband receiver to receive and transmit radio frequency signals, and the narrowband communication driver is used to drive a narrowband receiver to receive and transmit radio frequency signals.

[0042] The HAL layer encapsulates the kernel layer driver and simplifies the interaction between the hardware and the upper layer software. The HAL layer hides the hardware interface details of a specific platform and provides a virtual hardware platform for the operating system, which is hardware-independent. For example, the HAL layer includes a broadband communication module and a narrowband communication module. The broadband communication module is used for a virtual broadband receiver, and the narrowband communication module is used for a virtual narrowband receiver.

[0043] The system runtime layer includes C / C++ program libraries and runtime libraries. Many core components and services of the Android operating system are built from native code and need to be written in C and C++ as C / C++ program libraries. When an application is installed for the first time, it will be pre-compiled into a runtime library in the form of machine code. This process is called pre-compilation. In this way, when the application is started and executed, it can be accelerated by running the machine code.

[0044] The application layer can include a series of applications, such as music, calls, etc.

[0045] The framework layer provides application programming interfaces (APIs) and services for applications in the application layer. This enables applications to access the device's hardware features, system services, and interact with other applications. The framework layer also includes components for building user interfaces, such as Figure 3 The setup components shown in A, Figure 3 The framework layer also includes an interference estimation module, which is used to execute the interference estimation method involved in the embodiment of the present application. In response to the narrowband communication function being turned on, for example, in response to Figure 3 The setup component shown in A or Figure 3 The Bluetooth switch 31 in the drop-down menu component shown in B is turned on, and the interference estimation module can be called; or, in response to the start of a narrowband communication service, such as an electronic device starting to play music through a Bluetooth speaker, the interference estimation module can be called; or, the interference estimation module can be periodically called to execute the interference estimation method involved in the embodiment of the present application.

[0046] like Figure 4 As shown, an embodiment of the present application provides an interference estimation method, including:

[0047] S101. Measure the anti-interference selectivity of a narrowband receiver to a narrowband interference signal within a first frequency range.

[0048] The first frequency range is the operating frequency range of the narrowband receiver. The first frequency range is greater than the second frequency range, or in other words, the first frequency range includes the second frequency range. The second frequency range refers to the frequency range of the broadband interference signal (the frequency component of the broadband signal). The bandwidth of the first frequency range is even greater than or equal to three times the bandwidth of the second frequency range, so as not to miss the data of the broadband interference signal and to more accurately estimate the impact of the broadband interference signal on the narrowband signal. For example, the second frequency range is 2400MHz-2420MHz (bandwidth is 20MHz), and the first frequency range is 2380MHz-2440MHz (bandwidth is 60MHz).

[0049] The anti-interference selectivity can be the carrier-to-interference ratio C / I(f) of each frequency f. The narrowband receiver can be used to measure the power C of the narrowband useful signal and the power I of the interference signal at each frequency f, thereby obtaining the carrier-to-interference ratio C / I(f). That is, the carrier-to-interference ratio C / I(f) is equal to the ratio of the power C of the narrowband useful signal to the power I of the interference signal at each frequency f. For the convenience of calculation, the carrier-to-interference ratio C / I(f) is usually converted to the dB domain. At the center frequency of the narrowband useful signal, the carrier-to-interference ratio C / I(f) is the largest, and the receiver has the greatest degree of suppression of the interference signal at this frequency. The center frequency of the narrowband useful signal is equivalent to the frequency point of a channel in narrowband communication. The carrier-to-interference ratio C / I(f) reflects the suppression performance of the narrowband receiver on interference signals of various frequencies. It is an inherent performance of the narrowband receiver and will not change with the change of interference conditions in the electromagnetic environment. It can be stored in the electronic device before leaving the factory.

[0050] For example, Figure 5 As shown, assuming that the first frequency range of the narrowband signal is 2380MHz-2520MHz, the anti-interference selectivity of the narrowband receiver to the narrowband interference signal in the first frequency range is C / I(f), and f represents any frequency of the narrowband signal in the first frequency range.

[0051] S102: normalize the anti-interference selectivity of the narrowband receiver to the narrowband interference signal within the first frequency range according to the anti-interference selectivity of the center frequency of the narrowband useful signal to obtain the normalized anti-interference selectivity of the narrowband receiver within the first frequency range.

[0052] Take the anti-interference selectivity of the narrowband useful signal at the center frequency fc as the carrier-to-interference ratio C / I(fc) as an example, Figure 5As shown, since different narrowband receivers may have different interference suppression capabilities, the interference rejection selectivity C / I(fc) of the center frequency of the narrowband useful signal is not necessarily 0, and may also be a negative number or a positive number. In order to facilitate the unification of different narrowband receivers, the interference rejection selectivity C / I(f) of the narrowband receiver to the narrowband interference signal within the first frequency range can be subtracted from the interference rejection selectivity C / I(fc) of the center frequency of the narrowband useful signal at each frequency f, to obtain the normalized interference rejection selectivity A(f) of the narrowband receiver within the first frequency range. That is, A(f)=C / I(f)-C / I(fc), where f represents any frequency of the narrowband signal within the first frequency range, fc represents the center frequency of the narrowband useful signal, and A(fc)=0. A(f) can also be stored in the electronic device before leaving the factory.

[0053] For example, Figure 6 As shown, the frequency range of the narrowband useful signal is 2406MHz-2446MHz (bandwidth is 40MHz), and the center frequency of the narrowband useful signal is fc=2426MHz.

[0054] S103: Obtain the power of the broadband interference signal within the second frequency range according to the power spectral density (PSD) of the broadband interference signal within the second frequency range.

[0055] The PSD of the broadband interference signal in the second frequency range, PSD(f), is integrated to obtain the power of the broadband interference signal in the second frequency range, that is, the power of the broadband interference signal in the second frequency range , where f_low is the minimum value of the second frequency range (the frequency range of the broadband interference signal), f_hi is the maximum value of the second frequency range, and PSD(f) is the PSD of the broadband interference signal in the second frequency range. In scenes such as offices, shopping malls, airports, and railway stations, PSD(f) can be obtained in real time through a broadband receiver (such as a Wi-Fi chip).

[0056] The significance of this formula is that the PSD of the broadband interference signal at different frequency points is different, and the interference intensity to the narrowband signal is also different. The power of the broadband interference signal at a single frequency cannot be used to represent the interference intensity of the broadband interference signal within the second frequency range. Instead, the power obtained by integrating the PSD of the broadband interference signal is used to represent the interference intensity of the broadband interference signal within the second frequency range.

[0057] For example, Figure 6As shown in FIG. 1 , assuming that the center frequency of the broadband interference signal is 2422 MHz and the second frequency range is 2412 MHz-2432 MHz (bandwidth is 20 MHz), then f_low is 2412 MHz and f_hi is 2432 MHz. Figure 7 As shown, assuming that the center frequency of the broadband interference signal is 2447 MHz and the second frequency range is 2437 MHz-2457 MHz (bandwidth is 20 MHz), f_low is 2437 MHz and f_hi is 2457 MHz.

[0058] S104: Obtain the power of the broadband interference signal equivalently received by the narrowband receiver according to the PSD of the broadband interference signal within the second frequency range and the normalized anti-interference selectivity of the narrowband receiver within the first frequency range.

[0059] The power of the broadband interference signal equivalently received by the narrowband receiver The meaning of this formula is:

[0060] |A(f)| is the absolute value of A(f), which indicates the suppression strength of the narrowband receiver against the broadband interference signal. At frequency f, the larger |A(f)| is, the greater the suppression strength of the narrowband receiver against the broadband interference signal, and the smaller the power of the broadband interference signal received by the narrowband receiver is. The smaller |A(f)| is, the smaller the suppression strength of the narrowband receiver against the broadband interference signal is, and the larger the power of the broadband interference signal received by the narrowband receiver is. For example, at the center frequency fc of the narrowband useful signal, |A(fc)| is 0, that is, there is no suppression of the broadband interference signal of the same frequency. At other frequencies, |A(f)| is larger, and there is a stronger suppression of the broadband interference signal of the same frequency.

[0061] PSD(f)-|A(f)| at each frequency f represents the PSD of the broadband interference signal equivalently received by the narrowband receiver after the broadband interference signal is suppressed by the narrowband receiver, and then integrated in the second frequency range to obtain the power Pequal of the broadband interference signal equivalently received by the narrowband receiver. Since the narrowband receiver does not suppress the broadband interference signal at the center frequency fc of the narrowband useful signal (i.e., the broadband interference signal at the same frequency point), and strongly suppresses the broadband interference signal at other frequencies, the main factors affecting the size of Pequal are: whether the frequency range of the broadband interference signal (the second frequency range) includes the center frequency fc of the narrowband useful signal (i.e., whether the second frequency range includes the frequency point of narrowband communication), and the PSD of the broadband interference signal at the center frequency fc of the narrowband useful signal.

[0062] For example, Figure 6As shown in the figure, the frequency range of the broadband interference signal includes the center frequency fc of the narrowband useful signal, and the calculated Pequal is relatively large (about -44dBm), that is, the power of the broadband interference signal on the narrowband communication is relatively large, and the interference to the narrowband useful signal is more obvious. Figure 7 As shown, the frequency range of the broadband interference signal does not include the center frequency fc of the narrowband useful signal, and the calculated Pequal is smaller, that is, the power of the broadband interference signal on narrowband communication is small (about -84dBm), and the interference to the narrowband useful signal is not obvious.

[0063] S105. Obtain the anti-interference selectivity of the narrowband receiver to the broadband interference signal according to the anti-interference selectivity of the center frequency of the narrowband useful signal, the power of the broadband interference signal in the second frequency range, and the power of the broadband interference signal equivalently received by the narrowband receiver.

[0064] The anti-interference selectivity of a narrowband receiver to a broadband interference signal is C / Iwb=C / I(fc)+Pequal-Pi. The significance of this formula is: Figure 6 and Figure 7 The frequency range of the PSD of the broadband interference signal is different, but the power Pi of the broadband interference signal obtained after integration is the same. Pequal-Pi is equivalent to removing the influencing factors of the power of the broadband interference signal, correcting the power Pequal of the broadband interference signal equivalently received by the narrowband receiver, and retaining the main factors affecting the size of Pequal mentioned above. C / I(fc)+Pequal-Pi reflects the interference intensity of the broadband interference signal to the narrowband useful signal. The frequency range (second frequency range) of the broadband interference signal includes the center frequency fc of the narrowband useful signal (that is, whether the second frequency range includes the frequency point of narrowband communication), and the larger the PSD of the broadband interference signal at the center frequency fc of the narrowband useful signal, the larger the Pequal-Pi. Correspondingly, the larger the C / Iwb, the greater the interference intensity of the broadband interference signal to the narrowband communication, so C / Iwb can be used as an ACS indicator.

[0065] For example, Figure 8 As shown, assuming that the center frequency of the broadband interference signal is 2426 MHz, and the second frequency range is 2416 MHz-2436 MHz (bandwidth is 20 MHz), the interference intensity C / Iwb estimated by the interference estimation method of the embodiment of the present application is very close to the measured interference intensity in the second frequency range. Fig. 9 As shown, assuming that the center frequency of the broadband interference signal is 2426 MHz and the second frequency range is 2406 MHz-2446 MHz (bandwidth is 40 MHz), the interference intensity C / Iwb estimated by the interference estimation method of the embodiment of the present application is very close to the measured interference intensity within the second frequency range.

[0066] C / Iwb can be used as an ACS indicator for frequency hopping and frequency selection of narrowband communications (such as BT communications). For example, the broadband receiver (such as a Wi-Fi chip) and the narrowband receiver (such as a BT chip) in an electronic device share the 2.4G frequency band but work in time-sharing mode. The narrowband receiver can only obtain the interference situation of the current frequency point, and cannot obtain the interference situation of each frequency point in the entire 2.4G frequency band. The anti-interference selectivity of the narrowband receiver to the narrowband interference signal is an inherent characteristic of the narrowband receiver, so S101-S102 of the above interference estimation method can be performed before the electronic device leaves the factory, and the calculation results can be stored in the electronic device before leaving the factory. During the use of electronic equipment after leaving the factory, the PSD of the broadband interference signal of the entire bandwidth can be obtained at any time through the broadband receiver. When executing S103, a second frequency range including any frequency point of narrowband communication is selected from the entire bandwidth, and then S104-S105 is executed, and finally the anti-interference selectivity C / Iwb of the narrowband receiver to the broadband interference signal at the frequency point can be obtained. By analogy, the anti-interference selectivity C / Iwb of the narrowband receiver to the broadband interference signal at each frequency point can be obtained. The frequency hopping frequency points of narrowband communication are selected in the order of C / Iwb from small to large. For example, the frequency hopping frequency points of narrowband communication with smaller C / Iwb (i.e., smaller interference) are preferentially selected, so as to avoid the frequency points with larger in-band interference and improve the communication quality of narrowband communication.

[0067] Furthermore, for different scenarios such as offices, shopping malls, airports, and railway stations, the PSD of the broadband interference signal of the entire bandwidth in different scenarios is obtained through a broadband receiver, and the PSD of the broadband interference signal of the entire bandwidth in different scenarios is feature extracted to obtain a first PSD feature, and the first PSD feature in each scenario is bound to the frequency hopping frequency point preferentially selected in the scenario. During the use of the electronic device, the PSD of the broadband interference signal of the current scene is obtained through a broadband receiver, and the PSD of the broadband interference signal of the current scene is feature extracted to obtain a second PSD feature, and the second PSD feature is feature matched with the first PSD feature, so as to determine the frequency hopping frequency point preferentially selected for narrowband communication in the current scenario, which can avoid the frequency point with large in-band interference and improve the communication quality of narrowband communication.

[0068] The interference estimation method and electronic device provided in the embodiment of the present application, the interference estimation method provided in the embodiment of the present application, according to the power spectrum density of the broadband interference signal and the normalized anti-interference selectivity of the narrowband receiver, can convert the power of the broadband interference signal into the power of the equivalent narrowband interference signal in narrowband communication, which is affected by the following factors: the distance between the center frequency of the broadband interference signal and the center frequency of the narrowband useful signal, and the power of the broadband interference signal. Combined with the power of the equivalent narrowband interference signal and the power of the broadband interference signal, the anti-interference selectivity of the center frequency of the narrowband useful signal is compensated to obtain the anti-interference selectivity of the narrowband receiver to the broadband interference signal, the size of the anti-interference selectivity is not only related to the distance between the center frequency of the broadband interference signal and the center frequency of the narrowband useful signal, but also to the power of the broadband interference signal, which reflects the interference degree of the broadband interference signal to the narrowband useful signal, so it can be used to estimate the interference of the broadband interference signal to the narrowband communication.

[0069] The present application also provides a computer-readable storage medium, which includes instructions. When the instructions are executed on the electronic device, the electronic device executes each step in the method embodiment, such as executing Figure 4 The method shown.

[0070] The present application also provides a computer program product including instructions. When the instructions are executed on the electronic device, the electronic device executes each step in the method embodiment, such as executing Figure 4 The method shown.

[0071] Regarding the technical effects of the computer-readable storage medium and the computer program product, refer to the technical effects of the previous method embodiments.

[0072] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0073] Those of ordinary skill in the art will appreciate that the modules and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0074] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and modules described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0075] 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 modules is only a logical function division. There may be other division methods in actual implementation, such as multiple modules or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

[0076] The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, they may be located in one device or distributed on multiple devices. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment.

[0077] In addition, each functional module in each embodiment of the present application may be integrated into one device, or each module may exist physically separately, or two or more modules may be integrated into one device.

[0078] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An interference estimation method, characterized in that: include: Measuring the carrier-to-interference ratio of narrowband receivers to each frequency of narrowband interference signals; Normalizing the carrier-to-interference ratio of each frequency of the narrowband interference signal of the narrowband receiver according to the carrier-to-interference ratio of the center frequency of the narrowband useful signal to obtain a normalized carrier-to-interference ratio of the narrowband receiver; According to the power spectrum density of the broadband interference signal, the power of the broadband interference signal is obtained; According to the power spectral density of the broadband interference signal and the normalized carrier-to-interference ratio of the narrowband receiver, the power of the broadband interference signal equivalently received by the narrowband receiver is obtained; According to the carrier-to-interference ratio of the center frequency of the narrowband useful signal, the power of the broadband interference signal, and the power of the broadband interference signal equivalently received by the narrowband receiver, the carrier-to-interference ratio of the narrowband receiver to the broadband interference signal when the broadband interference signal exists is obtained.

2. The method according to claim 1, characterized in that The carrier-to-interference ratio of each frequency of the narrowband interference signal of the narrowband receiver is normalized according to the carrier-to-interference ratio of the center frequency of the narrowband useful signal to obtain the normalized carrier-to-interference ratio of the narrowband receiver, including: At each frequency f, the carrier-to-interference ratio C / I(f) of the narrowband receiver to the narrowband interference signal is subtracted from the carrier-to-interference ratio C / I(fc) at the center frequency of the narrowband useful signal to obtain the normalized carrier-to-interference ratio A(f) of the narrowband receiver.

3. The method according to claim 1, characterized in that According to the power spectrum density of the broadband interference signal, the power of the broadband interference signal is obtained, including: The power spectral density of the broadband interference signal is integrated to obtain the power of the broadband interference signal.

4. The method according to claim 1, characterized in that: According to the power spectrum density of the broadband interference signal and the normalized carrier-to-interference ratio of the narrowband receiver, the power of the broadband interference signal equivalently received by the narrowband receiver is obtained, including: The power of the broadband interference signal equivalently received by the narrowband receiver , f is the frequency, PSD(f) is the power spectral density of the broadband interference signal, A(f) is the normalized carrier-to-interference ratio of the narrowband receiver, f_low is the minimum value of the frequency range of the broadband interference signal, and f_hi is the maximum value of the frequency range of the broadband interference signal.

5. The method according to claim 1, characterized in that According to the carrier-to-interference ratio of the center frequency of the narrowband useful signal, the power of the broadband interference signal, and the power of the broadband interference signal equivalently received by the narrowband receiver, the carrier-to-interference ratio of the narrowband receiver to the broadband interference signal is obtained, including: The carrier-to-interference ratio of a narrowband receiver to a broadband interference signal is C / Iwb=C / I(fc)+Pequal-Pi, where Pequal is the power of the broadband interference signal equivalently received by the narrowband receiver, Pi is the power of the broadband interference signal, and C / I(fc) is the carrier-to-interference ratio of the center frequency of the narrowband useful signal.

6. The method according to any one of claims 1 to 5, characterized in that: Also includes: The PSD of the broadband interference signal of the entire bandwidth is obtained through a broadband receiver; The frequency hopping points for narrowband communication are selected in the order of the carrier-to-interference ratio of the narrowband receiver to the broadband interference signal from small to large.

7. The method according to claim 6, characterized in that Also includes: Acquire the PSD of the broadband interference signal of the entire bandwidth in different scenarios through a broadband receiver, extract features of the PSD of the broadband interference signal of the entire bandwidth in different scenarios, obtain a first PSD feature, and bind the first PSD feature in each scenario to a frequency hopping frequency point preferentially selected in the scenario; The PSD of the broadband interference signal of the current scene is obtained through a broadband receiver, and the feature of the PSD of the broadband interference signal of the current scene is extracted to obtain a second PSD feature, and the second PSD feature is feature matched with the first PSD feature to determine the frequency hopping point of the narrowband communication that is preferentially selected in the current scene.

8. An electronic device, characterized in that: The electronic device comprises a processor and a memory, wherein the memory stores instructions, and when the processor executes the instructions, the electronic device executes the method according to any one of claims 1 to 7.

9. A computer-readable storage medium, characterized in that: The method comprises instructions, which, when executed on an electronic device, cause the electronic device to execute the method according to any one of claims 1 to 7.

10. A computer program product comprising instructions, characterized in that When the instruction is executed on an electronic device, the electronic device executes the method according to any one of claims 1 to 7.

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