CN118174817A

CN118174817A - Interference processing method and device, communication equipment, chip and storage medium

Info

Publication number: CN118174817A
Application number: CN202211575207.2A
Authority: CN
Inventors: 席赵洋; 李玉宝
Original assignee: Zeku Technology Beijing Corp Ltd
Current assignee: Zeku Technology Beijing Corp Ltd
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2024-06-11

Abstract

The embodiment of the application provides an interference processing method, which comprises the following steps: acquiring a first frequency domain position of a single-tone interference signal on a working frequency band; and determining a frequency domain unit, of frequency domain units adjacent to the first frequency domain position on the working frequency band, of which the interval between the frequency domain position and the first frequency domain position is smaller than a first threshold value, as a candidate frequency domain unit, wherein the candidate frequency domain unit is used for eliminating interference of an input signal. The embodiment of the application also provides an interference processing device, communication equipment and a computer storage medium.

Description

Interference processing method and device, communication equipment, chip and storage medium

Technical Field

The present application relates to the field of electronic technologies, and in particular, to an interference processing method and apparatus, a communication device, a chip, and a storage medium.

Background

With the increasing number of frequency bands supported by the radio frequency chip (Radio Frequency Integrated Circuit, RFIC), in order to ensure the communication performance of the device, the number of Local Oscillators (LOs) also needs to increase with the increase of the frequency bands supported by the RFIC. Carrier aggregation techniques can lead to higher data rates, but typically require multiple LOs to operate simultaneously. The characteristics of the device itself determine the single-tone interference signal that can cross-modulate each other to produce harmonic leakage when multiple LOs are simultaneously operating, thereby introducing harmonic components within the frequency band.

The signal quality of the original signal can be seriously damaged by the single-tone interference signal with stronger destructiveness, meanwhile, the accuracy of a digital signal processing algorithm is influenced, the processing threshold of a system is improved, and the signal receiving under the condition of low signal-to-noise ratio can be seriously influenced. It is therefore necessary to process the single tone interference signals to enhance system performance.

Disclosure of Invention

The embodiment of the application provides an interference processing method and device, communication equipment, a chip and a storage medium.

The technical scheme of the application is realized as follows:

In a first aspect, an embodiment of the present application provides an interference processing method, including:

acquiring a first frequency domain position of a single-tone interference signal on a working frequency band;

And determining a frequency domain unit, of frequency domain units adjacent to the first frequency domain position on the working frequency band, of which the interval between the frequency domain position and the first frequency domain position is smaller than a first threshold value, as a candidate frequency domain unit, wherein the candidate frequency domain unit is used for eliminating interference of an input signal.

In a second aspect, an embodiment of the present application provides an interference processing apparatus, including:

the acquisition unit is configured to acquire a first frequency domain position of the single-tone interference signal on the working frequency band;

And the determining unit is configured to determine a frequency domain unit with a space smaller than a first threshold value between the frequency domain position and the first frequency domain position in frequency domain units adjacent to the first frequency domain position on the working frequency band as a candidate frequency domain unit, wherein the candidate frequency domain unit is used for interference elimination of an input signal.

In a third aspect, there is provided a communication device comprising: a processor and a memory for storing a computer program, the processor being adapted to invoke and run the computer program stored in the memory for performing the method according to the first aspect.

In a fourth aspect, there is provided a chip comprising: a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the method according to the first aspect.

In a fifth aspect, there is provided a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method of the first aspect.

The embodiment of the application provides an interference processing method, wherein a communication device can acquire a first frequency domain position of a single-tone interference signal on a working frequency band, and then, a frequency domain unit, of frequency domain units adjacent to the first frequency domain position on the working frequency band, of which the interval between the frequency domain position and the first frequency domain position is smaller than a first threshold value, is determined as a candidate frequency domain unit, and the candidate frequency domain unit is used for interference elimination of an input signal. Thus, the communication device can take the frequency domain unit which is closer to the single-tone interference signal as the frequency domain unit which needs interference elimination according to the frequency domain position of the single-tone interference signal. Therefore, the frequency domain units to be subjected to interference elimination can be distinguished according to the positions of the single-tone interference signals, so that the problem of user data loss caused by eliminating signals on important frequency domain units is avoided, and the influence of the single-tone interference signals on data throughput is reduced.

Drawings

Fig. 1 is a schematic diagram of a frequency domain position of an exemplary single-tone interference signal according to an embodiment of the present application;

fig. 2 is a schematic flow chart of an interference processing method according to an embodiment of the present application;

fig. 3 is a second schematic diagram of a frequency domain position of an exemplary single-tone interference signal according to an embodiment of the present application;

Fig. 4 is a flowchart of a method for determining candidate frequency domain units according to an embodiment of the present application;

fig. 5A is a second schematic flow chart of an interference processing method according to an embodiment of the present application;

fig. 5B is a schematic flow chart III of an interference processing method according to an embodiment of the present application;

FIG. 6 is a schematic diagram of a state machine switching scheme according to an embodiment of the present application;

Fig. 7 is a schematic spectrum diagram of a single-tone interference signal and a data signal according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of an interference processing device according to an embodiment of the present application;

Fig. 9 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a chip according to an embodiment of the present application.

Detailed Description

The following description of the technical solutions according to the embodiments of the present application will be given with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

In order to facilitate understanding of the technical solutions of the embodiments of the present application, the following description describes related technologies of the embodiments of the present application, and the following related technologies may be optionally combined with the technical solutions of the embodiments of the present application as alternatives, which all belong to the protection scope of the embodiments of the present application.

It should be appreciated that the single tone interfering signal may occur anywhere within the frequency band. Fig. 1 illustrates the locations and magnitudes at which single-tone interference signals may be located within a frequency band. Since user data can be transmitted through Resource Elements (REs), a tone interference signal may interfere with the transmission of user data to some extent. How to deal with this need to combine its impact on the overall system with the computational complexity assessment for the four types of tone interference in fig. 1. Illustratively, RE signal quality is severely corrupted for more damaging tone interfering signals (e.g., tone interfering signals corresponding to 2 and 3, respectively, in fig. 1).

In practical applications, the communication device may not process the single-tone interference signal, and tolerates quality loss caused by the single-tone interference signal. In this case, it is necessary to increase the dynamic range of the entire communication system in the communication apparatus, and the requirements for the communication system design are high. In addition, the communication device can also select an analog-digital converter (Analog to Digital Converter, ADC) with high sampling rate by depending on the design of the RFIC, so that harmonic components generated during the operation of the LO can avoid the frequency band range of the communication system, thereby avoiding the influence of a single-tone interference signal on user data. However, high sampling rate ADCs can increase the power consumption of the device and present a challenge to the bandwidth of the communication system. In addition, the communication device may perform zero setting processing on REs on both sides of the single-tone interference signal according to the position of the single-tone interference signal in the frequency domain. This approach may zero out the more important signals in the user data, affecting the maximum data throughput to some extent.

Based on the above, the embodiment of the application provides an interference processing method, which can be applied to communication equipment. The communication device may be referred to as an access terminal, user Equipment (UE), subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or User Equipment. An access terminal may be a cellular telephone, a cordless telephone, a session initiation protocol (Session Initiation Protocol, SIP) phone, an IoT device, a satellite handset, a wireless local loop (Wireless Local Loop, WLL) station, a Personal digital assistant (Personal DIGITAL ASSISTANT, PDA), a handset with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a 5 th generation mobile communication network or a terminal device in a future evolution network, etc.

The communication device may acquire a first frequency domain position of a single-tone interference signal on the operating frequency band, and then determine, as a candidate frequency domain unit, a frequency domain unit having a space between the frequency domain position and the first frequency domain position smaller than a first threshold value, from frequency domain units adjacent to the first frequency domain position on the operating frequency band, where the candidate frequency domain unit is used for interference cancellation of the input signal. Thus, the communication device can take the frequency domain unit which is closer to the single-tone interference signal as the frequency domain unit which needs interference elimination according to the frequency domain position of the single-tone interference signal. Therefore, the frequency domain units to be subjected to interference elimination can be distinguished according to the positions of the single-tone interference signals, so that the problem of user data loss caused by eliminating signals on important frequency domain units is avoided, and the influence of the single-tone interference signals on data throughput is reduced.

In order to facilitate understanding of the technical solution of the embodiments of the present application, the technical solution of the present application is described in detail below through specific embodiments. The above related technologies may be optionally combined with the technical solutions of the embodiments of the present application, which all belong to the protection scope of the embodiments of the present application. Embodiments of the present application include at least some of the following.

Referring to fig. 2, the interference processing method provided by the embodiment of the present application may include the following steps:

Step 210, acquiring a first frequency domain position of a single-tone interference signal on a working frequency band;

And 220, determining a frequency domain unit with the interval between the frequency domain position and the first frequency domain position smaller than a first threshold value in frequency domain units adjacent to the first frequency domain position on the working frequency band as a candidate frequency domain unit, wherein the candidate frequency domain unit is used for eliminating interference of the input signal.

It should be appreciated that, since the single-tone interference signal is generated by cross modulation between the plurality of LOs operating simultaneously, the single-tone interference signal may be measured on the communication device before the communication device leaves the factory. In the embodiment of the application, the related information (including but not limited to the frequency domain position, amplitude value, energy parameter and the like of the single-tone interference signal) of the single-tone interference signal can be stored in the local storage space of the communication equipment in advance.

It should be noted that, the single-tone interference signal may exist at any position on all frequency bands supported by the communication device. For example, the terminal device may maintain a list of the single-tone interference signals, where the single-tone interference signals are located on all frequency bands supported by the communication device, and service values or energy parameters of the single-tone interference signals may be stored in the list. The energy parameter of the single-tone interference signal can be calculated and determined according to the amplitude value of the single-tone interference signal.

In practice, the communication device may operate in a portion of all the frequency bands it supports. Illustratively, for a communication device supporting full network access (i.e., supporting multiple carrier networks), it may operate over a frequency band provided by a particular carrier network. Or for communication devices supporting both low frequency bands and high frequency bands (e.g., millimeter wave bands), it may operate in either band.

Alternatively, the operating frequency band of the communication device may be related to the currently accessed cell. The communication device may determine the current operating frequency band according to the accessed cell configuration information.

In the embodiment of the application, the communication equipment can acquire the first frequency domain position of the single-tone interference signal on the current working frequency band. Specifically, the communication device may determine, based on locally stored related information of the single-tone interference signal, a single-tone interference signal existing on a current operating frequency band of the communication device, to obtain a first frequency domain position of the single-tone interference signal.

Optionally, the communication device may read the list of single-tone interference signals, search the list of single-tone interference signals for a single-tone interference signal on a current operating frequency band of the communication device, and obtain a first frequency domain position of the single-tone interference signal on the operating frequency band of the communication device.

After obtaining the first frequency domain position of the single-tone interference signal, the communication device may determine, as the candidate frequency domain unit, a frequency domain unit, in which the interval between the frequency domain position and the first frequency domain position is smaller than a first threshold, from frequency domain units adjacent to the first frequency domain position on the operating frequency band.

It should be appreciated that the operating frequency band of the communication device may be divided into a plurality of frequency domain units. Wherein one frequency domain unit and one time domain unit may constitute one RE. That is, the RE may be composed of one frequency domain unit and one time domain unit. The communication device may carry user data on resource elements on the operating frequency band or for information such as channel estimation, phase tracking, etc. The frequency domain unit may be a subcarrier, or other frequency domain units, which is not limited in the embodiment of the present application.

It should be noted that the location of the frequency domain unit on the current operating frequency band of the communication device may be specified by a protocol.

Optionally, after obtaining the first frequency domain position of the single-tone interference signal, the communication device may search a frequency domain unit adjacent to the first frequency domain position from frequency domain units in the current operating frequency band. For example, referring to fig. 3, the communication device may determine that a single-tone interference signal exists in the current operating frequency band according to the locally stored related information of the single-tone interference signal, where a first frequency domain position of the single-tone interference signal is a frequency point F1. The communication device may determine that the frequency domain units adjacent to the tone interference signal include frequency domain units of RE1 and frequency domain units of RE 2.

Further, the communication device may determine a distance between a frequency domain unit adjacent to the single tone interfering signal and a first frequency domain location of the single tone interfering signal.

Alternatively, the communication device may calculate a difference in absolute value between the frequency domain position of the frequency domain unit adjacent to the single-tone interference signal and the first frequency domain position, resulting in a distance between the frequency domain unit adjacent to the single-tone interference signal and the first frequency domain position of the single-tone interference signal.

It should be noted that, the frequency domain position of the frequency domain unit may be a center frequency point of the frequency domain unit, or may be a frequency point corresponding to a maximum value of the signal amplitude on the frequency domain unit, which is not limited in the embodiment of the present application.

Illustratively, referring to fig. 3, the frequency domain position of RE1 is F2 and the frequency domain position of RE2 is F3. The distance between the first frequency domain position F1 of the single-tone interference signal and the frequency domain position F2 of RE1 is |F2-F1|. The distance between the first frequency domain position F1 of the mono interference signal and the frequency domain position F3 of RE2 is |f3-f1|.

In the embodiment of the present application, after the communication device determines the distance between the adjacent frequency domain unit of the single-tone interference signal and the first frequency domain position of the single-tone interference signal, the distance may be compared with the first threshold. If the distance is smaller than the first threshold value, the current frequency domain unit is greatly influenced by the single-tone interference signal. Therefore, the frequency domain unit is determined as a candidate frequency domain unit that is required for interference cancellation. If the distance is greater than or equal to the first threshold, the current frequency domain unit is less affected by the single-tone interference signal, and interference elimination processing is not needed.

Alternatively, the first threshold may be specified by a protocol, or may be determined by the communications device according to a preset rule, which is not limited in this embodiment of the present application.

Wherein the protocol may specify a specific length of the first threshold, e.g., 5khz,1khz, etc., to which embodiments of the present application are not limited.

In addition, the communication device may be determined according to a preset rule, where the communication device may be determined according to a preset proportional relationship with the subcarrier interval, for example, the first threshold may be 1/2 of the subcarrier interval, or may be 3/4 of the subcarrier interval, or may be subcarrier intervals with other proportions.

In summary, the communication device may use a frequency domain unit that is closer to the signal as a frequency domain unit that needs to be eliminated according to the frequency domain position of the signal. Therefore, the frequency domain units to be subjected to interference elimination can be distinguished according to the positions of the single-tone interference signals, so that the problem of user data loss caused by eliminating signals on important frequency domain units is avoided, and the influence of the single-tone interference signals on data throughput is reduced.

In practical applications, there may be a plurality of single-tone interference signals in the current operating frequency band of the communication device, that is, there may be a plurality of single-tone interference signals in the operating frequency band of the communication device.

In some embodiments, the communications device may perform the determination of step 210 and step 220 on all the single tone interference signals in the current operating frequency band, and determine whether the frequency domain unit adjacent to each single tone interference signal is a candidate frequency domain unit, to obtain a candidate frequency domain unit set. Based on the frequency domain unit set, interference elimination processing of the input signal is realized.

In other embodiments, the communications device may make the determinations of step 210 and step 220 for a portion of the single tone interfering signal on the current operating frequency band. Specifically, the communication device may determine, as a candidate frequency domain unit, a frequency domain unit in which an interval between a frequency domain position and a first frequency domain position of each of the plurality of single-tone interference signals is smaller than a first threshold value, among frequency domain units adjacent to each of at least some of the plurality of single-tone interference signals, to obtain a candidate frequency domain unit set; each candidate frequency domain unit in the set of candidate frequency domain units is used for interference cancellation of the input signal.

It should be appreciated that the single-tone interference signal is generated by cross modulation when the plurality of LOs are simultaneously operated, and may be measured before the communication device leaves the factory. Therefore, after the communication device leaves the factory, the number of the single-tone interference signals that it owns is determined. In the embodiment of the application, the number of the single-tone interference signals owned by the communication equipment is recorded as N and is an integer greater than or equal to 1.

In addition, since the processing resources of the communication device are limited, the maximum number of candidate frequency domain units that the communication device can perform interference cancellation is also determined. In the embodiment of the application, the number of the largest candidate frequency domain units which can be processed by the communication equipment can be recorded as M and is an integer which is more than or equal to 1.

Thus, the communication device may determine candidate frequency domain units based on N and M by performing the determinations of step 210 and step 220 on the single-tone interference signal on the current frequency band to obtain a set of candidate frequency domain units.

Optionally, in the foregoing embodiment, the communication device determines, as the candidate frequency domain unit, a frequency domain unit in which an interval between a frequency domain position and a first frequency domain position of each of the plurality of single-tone interference signals is smaller than a first threshold value, among frequency domain units adjacent to each of at least some of the plurality of single-tone interference signals, to obtain the candidate frequency domain unit set, where the method may be implemented by:

Judging whether an ith frequency domain unit adjacent to a first frequency domain position of an ith single tone interference signal in a plurality of single tone interference signals is in a candidate frequency domain unit set;

If the ith frequency domain unit is not in the candidate frequency domain unit set and the interval between the frequency domain position of the ith frequency domain unit and the first frequency domain position of the ith single-tone interference signal is smaller than a first threshold value, determining the ith frequency domain unit as a candidate frequency domain unit, and adding the ith frequency domain unit into the candidate frequency domain unit set;

continuing to judge whether an (i+1) th frequency domain unit adjacent to a first frequency domain position of an (i+1) th single tone interference signal in the plurality of single tone interference signals is in a candidate frequency domain unit set;

If the i+1th frequency domain unit is not the candidate frequency domain unit and the interval between the i+1th frequency domain unit and the first frequency domain position of the i+1th single-tone interference signal is smaller than the first threshold value, determining the i+1th frequency domain unit as the candidate frequency domain unit, and adding the i+1th frequency domain unit into the candidate frequency domain unit set until the number of the candidate frequency domain units in the candidate frequency domain unit set is M or until whether the N frequency domain units adjacent to the first frequency domain position of the N single-tone interference signal are the candidate frequency domain units is determined.

Wherein i is an integer greater than or equal to 1.

In the embodiment of the application, the communication equipment can judge the single-tone interference signals existing in the working frequency band one by one according to a certain sequence, and determine whether the adjacent frequency domain units of the single-tone interference signals are the frequency domain units needing to be subjected to interference elimination or not until the number of the judged single-tone interference signals reaches N or the number of the obtained candidate frequency domain units reaches M.

Optionally, the communication device may determine, one by one, the single-tone interference signals existing on the working frequency band according to the sequence of the frequency domain positions of the single-tone interference signals. In addition, the communication device may also judge the single-tone interference signals existing on the working frequency band one by one according to the order of the first energy parameters of the single-tone interference signals from large to small, which is not limited in the embodiment of the present application.

The first energy parameter of the single-tone interference signal refers to a signal energy value of the single-tone interference signal, and the first energy parameter of the single-tone interference signal may include an amplitude parameter or a power parameter of the single-tone interference signal, which is not limited in the embodiment of the present application.

For example, the communication device may order the plurality of single tone interfering signals present on its operating frequency band in order of the first energy parameter of each single tone interfering signal from high to low. In this order, the single-tone interference signals are judged one by one. That is, the first energy parameter of the i-th single-tone interference signal is greater than the first energy parameter of the i+1-th single-tone interference signal.

It should be noted that, referring to fig. 3, one single tone interference signal may affect signal quality of two left and right REs in a frequency band. Based on this, when the communication device judges the single-tone interference signals one by one, it can judge the first frequency domain unit adjacent to the left side (or the right side) of the first frequency domain position of the single-tone interference signals first, judge whether the frequency domain unit is already in the candidate frequency domain unit set, if not, calculate the absolute value of the difference between the frequency domain position of the frequency domain resource and the first frequency domain position of the current single-tone interference signals, and obtain the distance between the two. If the distance is smaller than the first threshold, the signal carried on the frequency domain unit is greatly influenced by the single-tone interference signal, and the frequency domain unit is added into the candidate frequency domain unit set. The communication device may then make the same determination as described above for the first frequency domain unit adjacent to the other side of the current single tone interfering signal.

Illustratively, referring to fig. 4, the communication device may derive the candidate set of frequency domain units as follows.

Step 1, acquiring a first frequency domain position of each single-tone interference signal in a plurality of single-tone interference signals existing on an operating frequency band of the communication device, and an absolute amplitude value (i.e. a first energy parameter in the above embodiment) of each single-tone interference signal.

And step 2, sequencing the plurality of single-tone interference signals according to the sequence of the absolute amplitude values of the single-tone interference signals from large to small.

And 3, judging whether the adjacent resource units of each single-tone interference signal are candidate frequency domain units one by one according to the number N of the maximum single-tone interference signals possessed by the communication equipment and the number M of the maximum candidate frequency domain units which can be processed by the communication equipment.

Specifically, step3 may include the steps of:

step 3.1, the communication device may determine whether the number (i) of currently processed single-tone interference signals is less than or equal to N, and whether the number of candidate frequency domain units in the candidate frequency domain unit set is less than or equal to M.

If the number of the currently processed single-tone interference signals is less than or equal to N and the number of the candidate frequency domain units in the candidate frequency domain unit set is less than or equal to M, step 301 is performed.

Step 3.2, referring to fig. 3, the communication device may determine a first frequency domain position F1 of the current ith single tone interference signal, find a first frequency domain unit F2 on the left nearest to F1, determine whether the frequency domain unit is already in the candidate frequency domain unit set, and if yes, jump to step 3.3. If not, the absolute value absFreq = |f2-f1| of the difference between F1 and F2 is calculated, if absFreq is smaller than 3/4 of the subcarrier spacing, which represents that the signal on the frequency domain unit is affected, the resource unit F2 is added to the candidate frequency domain unit set, and the number of candidate frequency domain units is accumulated by 1.

And 3.3, finding a first frequency domain unit F3 on the right nearest to F1, judging whether the first frequency domain unit F3 is in the candidate frequency domain unit set, and if so, jumping to the step 3.4. If not, the absolute value absFreq = |f3-f1| of the difference between F1 and F3 is calculated, if the absolute value absFreq is smaller than 3/4 of the subcarrier spacing, the signal representing the frequency domain unit is affected, the resource unit F2 is added to the candidate frequency domain unit set, and the number of candidate frequency domain units is accumulated by 1.

And 3.4, accumulating i by 1, and re-executing the step 3.1. And when the number of the single-tone interference elimination (i.e. the value of i) is N or the number of the candidate frequency domain units is greater than M, jumping out of the loop. Thus, a candidate set of frequency domain units may be obtained.

It should be understood that, after the operating frequency band of the communication device is determined, it is determined whether the adjacent frequency domain units of the single-tone interference signal are candidate frequency domain units. In general, the operating frequency band of the communication device is changed, or after the radio frequency module is restarted, the candidate frequency domain unit needs to be determined again based on step 210 and step 220. Specifically, under the condition that the current working frequency band of the communication equipment changes or the radio frequency module is restarted, a first frequency domain position of a single-tone interference signal on the working frequency band is obtained again, and a frequency domain unit, adjacent to the first frequency domain position, on the working frequency band is determined as a candidate frequency domain unit, wherein the interval between the frequency domain position and the first frequency domain position is smaller than a first threshold value.

Optionally, the operating frequency band of the communication device is changed, including but not limited to inter-frequency cell handover, network handover, and the like. In the embodiment of the present application, the processing procedures of the step 210 and the step 220 may be understood as static processing procedures. The execution of steps 210 and 220 is related to the operating band of the communication device and to the restarting of the radio frequency module.

In the embodiment of the present application, after the communication device determines the candidate frequency domain unit, the interference cancellation process may be performed based on the candidate frequency domain unit each time the input signal is received. The process can be understood as a dynamic processing process, and the communication device needs to perform interference cancellation processing on the input signal based on the candidate frequency domain unit obtained by the static processing process after receiving the input signal each time.

It should be noted that, when the communication device determines a plurality of candidate frequency domain units according to a plurality of single-tone interference signals in the current operating frequency band, that is, when the set of candidate frequency domain units in the above embodiment includes a plurality of candidate frequency domain units, the communication device may perform interference cancellation processing on the input signal based on the plurality of candidate frequency domain units.

In one possible implementation, referring to fig. 5A, after step 220, the communication device performs interference cancellation processing based on the candidate frequency domain units, which may be implemented by:

Step 230, performing interference cancellation processing on signals in candidate frequency domains in the input signal.

The interference cancellation process may be to zero the signal values on the candidate frequency domains. The influence of the single-tone interference signal on the whole user data is avoided by zeroing out the signal value.

In the embodiment of the application, the communication equipment can perform zero setting processing on the signals on the RE matched with the candidate frequency domain unit in the input signals after acquiring the input signals each time. In this way, it is ensured that candidate frequency domain units in the input signal do not receive interference.

It should be noted that, when the communication device determines a plurality of candidate frequency domain units according to a plurality of single-tone interference signals on the current operating frequency band, the communication device may perform zero setting processing on signals on REs matched with the candidate frequency domain units in each of the input signals.

In another possible implementation, referring to fig. 5B, after step 220, the communication device performs interference cancellation processing based on the candidate frequency domain unit, which may also be implemented by:

Step 240, determining a first energy parameter of the single-tone interference signal in the working frequency band;

step 250, determining a second energy parameter of the input signal in the current time period;

Step 260, determining whether to perform interference cancellation processing on signals on the candidate frequency domain units in the input signal in a next time period based on a relationship between a difference between the first energy parameter and the second energy parameter and a second threshold.

It should be understood that, during the dynamic processing, the communication device may measure the energy parameter of the input signal at intervals of a fixed time period, and determine, according to the energy parameter of the input signal in the current time period, whether the candidate frequency domain unit obtained during the static processing is valid in the next time period.

That is, the communication device may predict the intensity of the input signal in the next time period from the energy parameter of the input signal measured in the current time period, so as to determine whether to perform the zeroing process on REs on the input signal that match the candidate frequency domain unit in the next time period.

If the intensity of the input signal is high in the current time period, the input signal is not easily influenced by the single-tone interference signal, and at this time, the communication device can determine that the interference elimination processing on the signal on the candidate frequency domain unit of the input signal is not needed in the next time period. If the strength of the input signal is small, it means that the input signal is susceptible to the single-tone interference signal, and the communication device needs to perform interference cancellation processing on the signal in the candidate frequency domain unit of the input signal.

In some embodiments, the communication device may calculate a difference between the second energy parameter of the input signal and the first energy parameter of the single tone interfering signal for each time period, and compare the difference to a second threshold.

Optionally, if the difference between the first energy parameter and the second energy parameter is smaller than the second threshold, which indicates that the energy intensity of the input signal in the current time period is smaller than the difference, the communication device may determine that the candidate frequency domain unit (or the candidate frequency domain unit set) determined in the static processing process is invalid, that is, the communication device does not perform interference cancellation processing on the signal on the candidate frequency domain unit in the input signal in the next time period.

In addition, if the difference between the first energy parameter and the second energy parameter is greater than the second threshold, which indicates that the energy intensity of the input signal in the current time period is greatly different, the communication device may determine that the candidate frequency domain unit (or the candidate frequency domain unit set) is valid in the next time period, and does not need to perform interference cancellation processing on the signal on the candidate frequency domain unit in the input signal.

In the embodiment of the present application, the time period may be a signal Transmission time interval (Transmission TIME INTERVAL, TTI), or may be other time length specified by the protocol, for example, 0.5 ms, 0.8 ms, etc., which is not limited in the embodiment of the present application.

Alternatively, the second threshold may be determined from a traffic scenario of the communication device. The service scenario may include cell search, measurement, data transmission, and the like, which is not limited by the embodiment of the present application.

It should be appreciated that different traffic scenarios have different tolerance to single tone interference signals. For a cell search scenario, the second threshold may be set to a higher value. For data traffic, the second threshold may be set to a lower value. Thus, the requirements of different service scenes can be met.

In some embodiments, the second energy parameter of the input signal during the current time period may include:

the signal energy parameter of the time domain unit where the reference signal in the input signal is located in the current time period, or the average signal energy parameter of a plurality of time domain units in the input signal in the current time period.

Optionally, in the LTE system, considering the influence of the single-tone interference signal on the reference signal (for example, the cell reference signal CRS), the energy parameter of the time domain unit (for example, the OFDM symbol, or other type of time domain unit) where the reference signal is located may be used as the energy reference of the input signal in the next time period, so as to determine whether to perform interference cancellation processing on the signal on the candidate frequency domain unit in the input signal in the next time period. This allows the true reference signal to be maintained to the maximum extent, since the reference signal will be used for channel estimation.

In the NR system, the average energy parameter of all time domain units in the current time period may be used as an energy reference of the input signal in the next time period, so as to determine whether to perform interference cancellation processing on signals on the candidate frequency domain units in the input signal in the next time period.

In an LTE system, the communication device may use the signal energy parameter of the time domain unit where the CRS is located in the previous TTI as the reference value of the signal energy parameter in the next TTI. In this scenario, the communication device may calculate a difference rssi_delta between the energy parameter of each single tone interfering signal and the signal energy parameter on the current time domain symbol. In an NR system, the communication device can use the average signal energy parameter over each time domain unit in the previous TTI as a reference value for the signal energy parameter in the next TTI. In this scenario, the communication device may calculate a difference rssi_delta between the energy parameter of each single tone interfering signal and the average energy parameter.

In an embodiment of the present application, the second threshold may include a first sub-threshold and a second sub-threshold, the first sub-threshold being higher than the second sub-threshold.

Accordingly, step 260 determines whether to perform interference cancellation processing on signals on candidate frequency domain units in the input signal in a next time period based on a relationship between a difference between the first energy parameter and the second threshold, by:

Under the condition that the communication equipment is in a non-interference elimination state in the current time period, if the difference value is larger than or equal to a first sub-threshold value, determining to switch to an interference elimination state in the next time period; if the difference value is smaller than the first sub-threshold value, determining that the non-interference elimination state is continued in the next time period;

under the condition that the communication equipment is in an interference elimination state in the current time period, if the difference value is smaller than or equal to a second sub-threshold value, switching to the non-interference elimination state in the next time period is determined; if the difference value is larger than the second sub-threshold value, determining that the interference is continuously in the interference elimination state in the next time period;

Wherein the interference cancellation state characterization performs interference cancellation processing on signals on candidate frequency domain units in the input signal; the non-interference cancellation state characterization does not perform interference cancellation processing on candidate frequency domain units in the input signal.

It will be appreciated that the communication device may be provided with an interference cancellation state machine. Referring to fig. 6, the interference cancellation state machine includes two states: an interference canceled state and a non-interference canceled state. In the interference cancellation state, the communication device may perform interference cancellation processing on signals on the same candidate frequency domain unit in the input signal according to the candidate frequency domain unit or the candidate frequency domain unit set determined by the static processing procedure. In the non-interference canceled state, the communication device may not perform interference cancellation processing on the input signal.

To avoid the communication device switching repeatedly between the interference canceled state and the non-interference canceled state, the second threshold may be set to include two different sub-thresholds, a first sub-threshold and a second sub-threshold. The first sub-threshold is greater than the second sub-threshold. In the embodiment of the present application, the first sub-threshold may be referred to as the highest threshold, and the second sub-threshold may be referred to as the lowest threshold.

Referring to fig. 6, when the state machine of the communication device is in the interference cancellation state, if the difference between the first energy parameter and the second energy parameter is greater than the lowest threshold value, the current state machine is not switched, so that the communication device continues to perform the zeroing operation on the candidate frequency domain unit (or the candidate frequency domain unit set) of the input signal in the next time period. And if the difference value between the first energy parameter and the second energy parameter is smaller than or equal to the lowest threshold value, switching the state machine to a non-interference elimination state, so that the communication equipment does not perform zero setting operation on the candidate frequency domain units (or the candidate frequency domain unit set) of the input signal in the next time period.

When the state machine of the communication equipment is in a non-interference elimination state, if the difference value between the first energy parameter and the second energy parameter is smaller than the highest threshold value, the current state machine is not switched, and thus, the communication equipment keeps not performing zero setting operation on the candidate frequency domain units (or the candidate frequency domain unit sets) of the input signal in the next time period. If the difference between the first energy parameter and the second energy parameter is greater than or equal to the highest threshold, the state machine is switched to an interference cancellation state, so that the communication device can perform zero setting operation on the candidate frequency domain units (or the candidate frequency domain unit set) of the input signal in the next time period.

In an embodiment of the present application, the interference processing method provided in the embodiment of the present application may further include the following steps:

Determining a reference signal of which the frequency domain unit is not subjected to interference elimination processing in the input signal to obtain a target reference signal;

channel estimation is performed based on the target reference signal.

It will be appreciated that the reference signal in the input signal has a significant impact on the channel estimation. Channel estimation by the communication device needs to be done based on the reference signal. In the above procedure, the frequency domain unit in which the reference signal in the input signal is located may be subjected to interference cancellation processing.

Based on this, the communication apparatus needs to record the interference processing results of the respective reference signals in the input signal. In some embodiments, the communication device may record only the reference signal in the input signal on which the interference cancellation process is performed. Only the reference signals in the input signals, on which the interference cancellation process is not performed, may be recorded, and the processing result of each reference signal in the input signals may be recorded at the same time.

Thus, the communication device can estimate according to the interference processing result of each reference signal in the input signal when performing channel estimation. Specifically, for a reference signal that is severely affected by a single-tone interference signal and is subjected to interference cancellation processing, the communication device may skip the reference signal when performing channel estimation. Channel estimation is performed based only on reference signals for which interference cancellation is not performed. In this way, the accuracy of channel estimation can be improved.

Illustratively, referring to fig. 7, the communications device operates in a frequency band that includes three single tone interfering signals. The frequency domain positions of the three single-tone interference signals are respectively [ -4.2,0,6] (MHz), and the amplitude values are respectively [ -60, -70, -50] (dBm). The signal is obtained after the above-described static and dynamic processes, as shown by the parabola in fig. 7.

In summary, according to the interference processing method provided by the embodiment of the present application, the subcarriers to be subjected to interference cancellation can be distinguished according to the frequency domain position and the energy parameter of the single-tone interference signal, and the energy parameter of the current useful signal and the energy parameter of the single-tone interference signal are dynamically detected in the continuous working state of the radio frequency receiver, so that the subcarriers to be subjected to interference cancellation are timely adjusted, and meanwhile, the interference cancellation result can be recorded for the subcarriers bearing the important signal (for example, the reference signal), so that the candidates can be subjected to special processing.

It can be understood that the interference processing method provided by the embodiment of the application comprises two parts. The first part is a static processing process, and whether the frequency domain unit where the user data is located is a candidate frequency domain unit which needs to execute interference elimination processing or not is obtained according to the working frequency band of the communication equipment and the frequency domain position where the single-tone interference signal is located. The second part is dynamic processing, and whether the candidate frequency domain unit obtained in a static state is effective or not is determined according to the candidate frequency domain unit obtained in the static state and the signal energy parameter obtained by measuring every fixed period.

The preferred embodiments of the present application have been described in detail above with reference to the accompanying drawings, but the present application is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present application within the scope of the technical concept of the present application, and all the simple modifications belong to the protection scope of the present application. For example, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further. As another example, any combination of the various embodiments of the present application may be made without departing from the spirit of the present application, which should also be regarded as the disclosure of the present application. For example, on the premise of no conflict, the embodiments described in the present application and/or technical features in the embodiments may be combined with any other embodiments in the prior art, and the technical solutions obtained after combination should also fall into the protection scope of the present application.

Based on the same application communication as the above embodiments, the embodiment of the present application further provides an interference processing device. Referring to fig. 8, the interference processing apparatus includes:

an obtaining unit 801 configured to obtain a first frequency domain position of a single-tone interference signal on an operating frequency band;

And a determining unit 802 configured to determine, as a candidate frequency domain unit, a frequency domain unit, in which a space between a frequency domain position and the first frequency domain position is smaller than a first threshold, among frequency domain units adjacent to the first frequency domain position on the operating frequency band, where the candidate frequency domain unit is used for interference cancellation of an input signal.

In some embodiments, the determining unit 802 is further configured to determine, as candidate frequency domain units, in which an interval between a frequency domain position and a first frequency domain position of each of the plurality of single-tone interference signals is smaller than the first threshold, among frequency domain units adjacent to each of at least some of the plurality of single-tone interference signals, to obtain a set of candidate frequency domain units;

Each candidate frequency-domain unit in the set of candidate frequency-domain units is used for interference cancellation of the input signal.

In some embodiments, the determining unit 802 is further configured to determine whether an i-th frequency-domain unit adjacent to the first frequency-domain position of the i-th single-tone interference signal of the plurality of single-tone interference signals is in the candidate frequency-domain unit set;

continuing to judge whether an (i+1) th frequency domain unit adjacent to a first frequency domain position of an (i+1) th single tone interference signal in the plurality of single tone interference signals is in the candidate frequency domain unit set;

If the i+1th frequency domain unit is not a candidate frequency domain unit and the interval between the i+1th frequency domain unit and the first frequency domain position of the i+1th single-tone interference signal is smaller than a first threshold value, determining the i+1th frequency domain unit as a candidate frequency domain unit, and adding the i+1th frequency domain unit into the candidate frequency domain unit set until the number of candidate frequency domain units in the candidate frequency domain unit set is M, or until whether the nth frequency domain unit adjacent to the first frequency domain position of the nth single-tone interference signal is a candidate frequency domain unit is determined, wherein M is the maximum number of candidate frequency domain units which can be processed by the communication equipment.

In some embodiments, the first energy parameter of the i-th single tone interfering signal is greater than the first energy parameter of the i+1-th single tone interfering signal.

In some embodiments, the obtaining unit 801 is further configured to obtain the first frequency domain position of the single-tone interference signal on the operating frequency band when the operating frequency band changes or the radio frequency module is restarted.

In some embodiments, the interference processing apparatus further comprises an interference processing unit configured to perform interference cancellation processing on signals on the candidate frequency domains in the input signal.

In some embodiments, the interference processing unit is further configured to determine a first energy parameter of the single tone interfering signal in the operating frequency band; determining a second energy parameter of the input signal during the current time period; based on a relationship between a difference between the first energy parameter and the second energy parameter and a second threshold, it is determined whether to perform interference cancellation processing on signals on the candidate frequency domain units in the input signal in a next time period.

In some embodiments, the second threshold includes a first sub-threshold and a second sub-threshold, the first sub-threshold being higher than the second sub-threshold;

The interference processing unit is further configured to determine to switch to an interference cancellation state in the next time period if the difference is greater than or equal to the first sub-threshold in the case of being in a non-interference cancellation state in the current time period; if the difference value is smaller than the first sub-threshold value, determining that the non-interference elimination state is continued in the next time period; if the difference value is smaller than or equal to the second sub-threshold value under the condition that the current time period is in the interference elimination state, determining to switch to the non-interference elimination state in the next time period; if the difference value is greater than the second sub-threshold value, determining that the interference cancellation state is continued in the next time period;

Wherein the interference cancellation state characterization performs interference cancellation processing on signals on the candidate frequency domain units in the input signal; the non-interference cancellation state characterization does not perform interference cancellation processing on signals on the candidate frequency domain units in the input signal.

The second threshold is determined based on a traffic scenario of the communication device, the traffic scenario comprising one or more of: cell search scenario, measurement scenario, data transmission scenario.

In some embodiments, the second energy parameter comprises:

In the current time period, inputting signal energy parameters of a time domain unit where a reference signal in the signal is located;

Or alternatively

And in the current time period, the average signal energy parameters of a plurality of time domain units in the input signal are calculated.

In some embodiments, the interference processing apparatus further includes a channel estimation unit configured to determine a reference signal in the input signal in which the frequency unit is not subjected to interference cancellation processing, to obtain a target reference signal; and carrying out channel estimation based on the target reference signal.

It should be understood by those skilled in the art that the above description of the interference processing apparatus according to the embodiment of the present application may be understood with reference to the description of the interference processing method according to the embodiment of the present application.

Fig. 9 is a schematic block diagram of a communication device 900 according to an embodiment of the present application. The communication device may be a terminal device or a network device. The communication device 900 shown in fig. 9 comprises a processor 910, from which the processor 910 may call and run a computer program to implement the method in an embodiment of the application.

Optionally, as shown in fig. 9, the communication device 900 may also include a memory 920. Wherein the processor 910 may invoke and run a computer program from the memory 920 to implement the method in the embodiments of the present application.

Wherein the memory 920 may be a separate device from the processor 910 or may be integrated in the processor 910.

Optionally, as shown in fig. 9, the communication device 900 may further include a transceiver 930, and the processor 910 may control the transceiver 930 to communicate with other devices, and in particular, may send information or data to other devices, or receive information or data sent by other devices.

Wherein transceiver 930 may include a transmitter and a receiver. Transceiver 930 may further include antennas, the number of which may be one or more.

Fig. 10 is a schematic structural view of a chip of an embodiment of the present application. The chip 1000 shown in fig. 10 includes a processor 1010, and the processor 1010 may call and run a computer program from a memory to implement the method in the embodiment of the present application.

Optionally, as shown in fig. 10, the chip 1000 may further include a memory 1020. Wherein the processor 1010 may call and run a computer program from the memory 1020 to implement the methods in embodiments of the present application.

The memory 1020 may be a separate device from the processor 1010 or may be integrated into the processor 1010.

Optionally, the chip 1000 may also include an input interface 1030. The processor 1010 may control the input interface 1030 to communicate with other devices or chips, and in particular, may obtain information or data sent by the other devices or chips.

Optionally, the chip 1000 may further include an output interface 1040. Wherein the processor 1010 may control the output interface 1040 to communicate with other devices or chips, and in particular, may output information or data to other devices or chips.

It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, or the like.

The embodiment of the application also provides a computer storage medium, in particular a computer readable storage medium. On which computer instructions are stored which, when executed by a processor, implement any of the steps of the above-described interference handling method of embodiments of the present application, when the computer storage medium is located in a communication device.

In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above described device embodiments are only illustrative, e.g. the division of the units is only one logical function division, and there may be other divisions in practice, such as: multiple units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. In addition, the various components shown or discussed may be coupled or directly coupled or communicatively coupled to each other via some interface, whether indirectly coupled or communicatively coupled to devices or units, whether electrically, mechanically, or otherwise.

The units described as separate units may or may not be physically separate, and units displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of 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.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may be separately used as one unit, or at least two units may be integrated in one unit; the integrated units may be implemented in hardware or in hardware plus software functional units.

Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the above method embodiments may be implemented by hardware associated with program instructions, where the foregoing program may be stored in a computer readable storage medium, and when executed, the program performs steps including the above method embodiments; and the aforementioned storage medium includes: a removable storage device, ROM, RAM, magnetic or optical disk, or other medium capable of storing program code.

Or the above-described integrated units of the application may be stored in a computer-readable storage medium if implemented in the form of software functional modules and sold or used as separate products. Based on such understanding, the technical solutions of the embodiments of the present application may be embodied in essence or a part contributing to the prior art in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: various media 5 which can store program codes, such as a mobile storage device, a ROM, a RAM, a magnetic disk, or an optical disk.

It should be noted that: the technical schemes described in the embodiments of the present application may be arbitrarily combined without any collision.

The foregoing is merely illustrative embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about 0 changes or substitutions within the technical scope of the present application, and the application is intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An interference processing method, comprising:

2. The method of claim 1, wherein the number of single tone interfering signals on the operating frequency band comprises a plurality of; the determining, as a candidate frequency domain unit, a frequency domain unit in which an interval between a frequency domain position and the first frequency domain position is smaller than a first threshold value, from among frequency domain units adjacent to the first frequency domain position on the operating frequency band, includes:

determining frequency domain units with the interval between the frequency domain position and the first frequency domain position of each single-tone interference signal smaller than the first threshold value in frequency domain units adjacent to each single-tone interference signal of at least part of the plurality of single-tone interference signals as candidate frequency domain units to obtain a candidate frequency domain unit set;

3. The method of claim 2, wherein determining, as the candidate frequency domain units, frequency domain units having a frequency domain position spaced from the first frequency domain position of each of the plurality of single tone interfering signals by less than the first threshold, among frequency domain units adjacent to each of the at least some of the plurality of single tone interfering signals, to obtain the set of candidate frequency domain units, comprises:

judging whether an ith frequency domain unit adjacent to a first frequency domain position of an ith single tone interference signal in the plurality of single tone interference signals is in the candidate frequency domain unit set;

4. A method according to claim 3, wherein the first energy parameter of the i-th single tone interfering signal is greater than the first energy parameter of the i+1-th single tone interfering signal.

5. The method according to any one of claims 1-4, wherein the obtaining a first frequency domain location of a single tone interference signal in an operating frequency band, and determining, as a candidate frequency domain unit, a frequency domain unit in which a space between the frequency domain location and the first frequency domain location is smaller than a first threshold value, from among frequency domain units adjacent to the first frequency domain location in the operating frequency band, includes:

And under the condition that the working frequency band changes or the radio frequency module is restarted, acquiring a first frequency domain position of a single-tone interference signal on the working frequency band, and determining a frequency domain unit, of frequency domain units adjacent to the first frequency domain position on the working frequency band, of which the interval between the frequency domain position and the first frequency domain position is smaller than a first threshold value, as a candidate frequency domain unit.

6. The method according to any one of claims 1-5, further comprising:

and performing interference elimination processing on signals on the candidate frequency domains in the input signals.

7. The method according to any one of claims 1-5, further comprising:

Determining a first energy parameter of the single-tone interference signal in the working frequency band;

determining a second energy parameter of the input signal during the current time period;

based on a relationship between a difference between the first energy parameter and the second energy parameter and a second threshold, it is determined whether to perform interference cancellation processing on signals on the candidate frequency domain units in the input signal in a next time period.

8. The method of claim 7, wherein the second threshold comprises a first sub-threshold and a second sub-threshold, the first sub-threshold being higher than the second sub-threshold;

The determining whether to perform interference cancellation processing on signals on the candidate frequency domain units in the input signal in a next time period based on a relationship between a difference between the first energy parameter and the second energy parameter and a second threshold value, including:

If the difference value is greater than or equal to the first sub-threshold value under the condition that the current time period is in a non-interference elimination state, determining to switch to an interference elimination state in the next time period; if the difference value is smaller than the first sub-threshold value, determining that the non-interference elimination state is continued in the next time period;

if the difference value is smaller than or equal to the second sub-threshold value under the condition that the current time period is in the interference elimination state, determining to switch to the non-interference elimination state in the next time period; if the difference value is greater than the second sub-threshold value, determining that the interference cancellation state is continued in the next time period;

9. The method of claim 7, wherein the second threshold is determined based on a traffic scenario; the business scenario includes one or more of the following: cell search scenario, measurement scenario, data transmission scenario.

10. The method of claim 7, wherein the second energy parameter comprises:

Or alternatively

11. The method according to any one of claims 6 to 9, wherein,

and carrying out channel estimation based on the target reference signal.

12. An interference handling device, comprising:

13. A communication device, comprising: a processor and a memory for storing a computer program, the processor being adapted to invoke and run the computer program stored in the memory for performing the method according to any of claims 1 to 11.

14. A chip, comprising: a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the method of any one of claims 1 to 11.

15. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, carries out the steps of the method according to any one of claims 1-11.