CN114696868A - Method, device, equipment and storage medium for reducing NR (noise-and-noise) and WIFI (wireless fidelity) interference - Google Patents
Method, device, equipment and storage medium for reducing NR (noise-and-noise) and WIFI (wireless fidelity) interference Download PDFInfo
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- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
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- H04B1/52—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
- H04B1/525—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa with means for reducing leakage of transmitter signal into the receiver
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- H04B17/30—Monitoring; Testing of propagation channels
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- H—ELECTRICITY
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- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
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Abstract
The application relates to the field of communication, and provides a method, a device, equipment and a storage medium for reducing NR and WIFI interference. The method comprises the following steps: detecting the working states and the working qualities of the NR antenna and the WIFI antenna to obtain a first detection result; if the interference exists according to the first detection result, accessing a filter circuit and extracting a filtered interference signal; simulating the transmission delay of the filtered interference signal, and acquiring a simulated interference signal of the interference signal synthesized by n paths of signals, wherein n is a preset positive integer, and the transmission delay is the delay of the interference signal in the process from a transmitting antenna to a receiving antenna; performing signal attenuation and phase adjustment on the analog interference signal to obtain an interference cancellation signal, wherein the phase difference between the interference cancellation signal and the interference signal is 180 degrees; and sending the interfered signals subjected to the interference cancellation signal processing into a corresponding radio frequency link. The purpose of reducing the interference between NR and WIFI is achieved.
Description
Technical Field
The embodiment of the application relates to the field of communication, in particular to a method, a device, equipment and a storage medium for reducing NR and WIFI interference.
Background
In order to provide better use experience for users, more and more 5G terminals add a dual-network acceleration function in products, and one common dual-network type is 5G + WIFI dual-network superposition. The 5G NR adopts a Multiple-Input Multiple-Output (MIMO) technology with Multiple antennas, so that spatial multiplexing gain is improved by using MIMO antennas, and uplink and downlink throughput capacity can be greatly improved, therefore, the network performance of the terminal product can be greatly improved by using the 5G NR +5G WIFI technology. However, the 5G NR and the 5G WIFI have very close working frequency bands, especially the 5G NR works in the N78 and N79 frequency bands of 3.3GHz-3.8GHz and 4.4GHz-5GHz respectively and the 5.17GHz-5.825GHz frequency band in which the WIFI 5G can work, so that serious carrier leakage and even same-frequency interference must exist between the 5G NR and the 5G WIFI due to the influences of carrier leakage, nonlinear factors of a transmitter and the like. In addition, in order to save the cost of the WIFI link, the terminal product often selects a WIFI filter with a wider frequency band, so that the interference between the 5G NR and the 5G WIFI is more serious. In order to solve the problem, one method is to change a filter into a high-Q filter, obtain excellent rectangular coefficient and out-of-band rejection capability on the premise of ensuring the insertion loss of the filter, ensure that the two filters work completely independently and solve the problem of carrier leakage. The other method is to actually measure the minimum antenna isolation required when the two systems of NR and WIFI coexist and do not interfere with each other, and then to enable the antennas of the two systems of NR and WIFI to meet the minimum antenna isolation when designing the antennas of the 5G terminal.
However, on the one hand, the miniaturization application of the rf filter with a high Q value is still one of the pain points in the industry, and besides being expensive and only solving the problem that the out-of-band carrier leaks to the receiving channel, the interference that the radiation interference enters the same frequency position of the receiving antenna due to the nonlinear factor of the transmitter cannot be suppressed, and the applicability of the rf filter has certain limitations. On the other hand, the frequency bands supported by 5G terminal products are more than 30, the number of antennas is more than 10, and the size of the terminal products cannot ensure reasonable isolation between the antennas. And the isolation between the two systems is increased, although the performance of parallel work between the two systems can be improved, because the NR and the WIFI 5G generally adopt the working mechanism of MIMO at present, it is difficult to ensure that the terminal can work independently in the limited space. Therefore, if the independence of the two modules is maintained, it is difficult to enable the independent operation between the NR and WIFI systems without interference.
Disclosure of Invention
The embodiment of the application mainly aims to provide a method, a device, equipment and a storage medium for reducing NR and WIFI interference, and aims to reduce the interference between NR and WIFI, so that the problem that an out-of-band carrier leaks out of a receiving channel can be solved, and the interference at the same frequency position of a receiving antenna caused by radiation interference due to nonlinear factors of a transmitter also has a good inhibition effect, so that the condition that the carrier leaks into the passband of the other party is improved, the throughput performance of a terminal and the network performance are improved, the throughput of a 5G terminal is improved, and the capability of parallel work of NR and WIFI 5G is maintained to the maximum extent.
To achieve the above object, the present application provides a method for reducing NR and WIFI interference, the method including the following steps: detecting the working states and the working qualities of the NR antenna and the WIFI antenna to obtain a first detection result; if the interference exists according to the first detection result, accessing a filter circuit and extracting a filtered interference signal; simulating the transmission delay of the filtered interference signal to obtain a simulated interference signal of the interference signal synthesized by n paths of signals, wherein the transmission delay is the delay of the interference signal in the process of transmitting the interference signal from a transmitting antenna to a receiving antenna; performing signal attenuation processing and phase adjustment on the analog interference signal to obtain an interference cancellation signal, wherein n is a preset positive integer, and the phase difference between the interference cancellation signal and the interference signal is 180 degrees; and sending the interfered signals processed by the interference cancellation signals to a corresponding radio frequency main link.
In order to achieve the above object, the present application further provides an apparatus for reducing NR and WIFI interference, including: the detection module is used for detecting the working states and the working qualities of the NR antenna and the WIFI antenna and acquiring a first detection result; the filtering module is used for accessing a filtering circuit and extracting a filtered interference signal if the interference is detected to exist according to the first detection result obtained by the detection module; the interference elimination NWIC module is used for simulating the transmission time delay of the interference signal, acquiring a simulated interference signal of the interference signal synthesized by n paths of signals, wherein n is a preset positive integer, the transmission time delay is the time delay of the interference signal in the process of transmitting the interference signal from a transmitting antenna to a receiving antenna, and performing signal attenuation processing and phase adjustment on the simulated interference signal to acquire an interference cancellation signal, wherein the phase difference between the interference cancellation signal and the interference signal is 180 degrees, and the interference signal subjected to the interference cancellation signal processing is sent to a corresponding radio frequency link.
An embodiment of the present invention also provides an electronic device, including:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein, the first and the second end of the pipe are connected with each other,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the above-described method of reducing NR and WIFI interference.
Embodiments of the present invention also provide a computer-readable storage medium storing a computer program which, when executed by a processor, implements the above-described method of reducing NR and WIFI interference.
Compared with the prior art, the embodiment of the invention detects the working state and the working quality of the NR antenna and the WIFI antenna, acquires the first detection result, can detect whether interference exists according to the first detection result, accesses the filter circuit and extracts the filtered interference signal if the interference exists, can inhibit the carrier leakage problem of NR and WIFI through filtering, improves the out-of-band inhibition capability of a transmitting link, further inhibits the adjacent frequency interference existing between the WIFI and the NR, acquires an analog interference signal by simulating the transmission delay of the interference signal, acquires an interference elimination signal with the same size and opposite phase as the interference signal through attenuation processing and phase adjustment, finally utilizes the interference elimination signal to eliminate the influence of the interference signal on the interfered signal, and sends the processed interfered signal to a radio frequency main link corresponding to the interfered signal, the influence of interference signals at the same frequency position of the receiving antenna is further reduced, the interference between NR and WIFI is reduced, the problem that an out-of-band carrier wave is leaked out of a receiving channel can be solved, and the purpose of well inhibiting the interference of radiation interference entering the same frequency position of the receiving antenna caused by the nonlinear factor of a transmitter is achieved.
Drawings
One or more embodiments are illustrated by the figures in the accompanying drawings, which correspond to and are not intended to limit the embodiments.
Fig. 1 is a flowchart of a method for reducing NR and WIFI interference according to a first embodiment of the present invention;
fig. 2 is a flowchart of a method for reducing NR and WIFI interference according to a second embodiment of the present invention;
fig. 3 is a circuit diagram of a single-input multiple-output structure involved in step 203 of the method for reducing NR and WIFI interference according to the second embodiment of the present invention shown in fig. 2;
fig. 4 is a flowchart of a method for reducing NR and WIFI interference according to a third embodiment of the present invention;
fig. 5 is a flowchart of a method for reducing NR and WIFI interference according to a fourth embodiment of the present invention;
fig. 6 is a flowchart of step 504 of the method for reducing NR and WIFI interference according to the fourth embodiment of the present invention shown in fig. 5;
fig. 7 is a first antenna distribution diagram according to step 604 in the method for reducing NR and WIFI interference according to the fourth embodiment of the present invention shown in fig. 6;
fig. 8 is an antenna distribution diagram ii involved in step 604 of the method for reducing NR and WIFI interference according to the fourth embodiment of the present invention shown in fig. 6;
fig. 9 is a flowchart of a method for reducing NR and WIFI interference according to a fifth embodiment of the present invention;
fig. 10 is a schematic structural diagram of an apparatus for reducing NR and WIFI interference according to a sixth embodiment of the present invention;
fig. 11 is a first circuit diagram related to the NWIC module 1003 in the NR and WIFI interference reducing apparatus according to the sixth embodiment of the present invention shown in fig. 10;
fig. 12 is a second circuit diagram related to the NWIC module 1003 in the NR and WIFI interference reducing apparatus according to the sixth embodiment of the present invention shown in fig. 10;
fig. 13 is a schematic structural diagram of an electronic device according to a seventh embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that in the examples of the present application, numerous technical details are set forth in order to provide a better understanding of the present application. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments. The following embodiments are divided for convenience of description, and should not constitute any limitation to the specific implementation manner of the present application, and the embodiments may be mutually incorporated and referred to without contradiction.
A first embodiment of the present application relates to a method for reducing NR and WIFI interference, as shown in fig. 1, specifically including:
Specifically, the first detection result includes: sensitivity, throughput and transmission status, reception status, etc. Of course, the above is only a specific example, and the first detection result may further include other parameters in the actual using process, which is not described herein again.
And 102, if the interference exists according to the first detection result, accessing a filter circuit and extracting a filtered interference signal.
In the present embodiment, the presence of interference includes the following cases: the NR antenna is in a transmitting state, the WIFI antenna is in a receiving state, and the WIFI sensitivity or throughput is smaller than a given threshold value; the NR antenna is in a receive state, the WIFI antenna is in a transmit state and the NR sensitivity or throughput detection system finds that its value is less than a given threshold, etc. Of course, the above is only a specific example, and the situation where there is interference in the actual using process may also include other situations, which are not described in detail herein.
Specifically, if the NR antenna is in a transmitting state, the WIFI antenna is in a receiving state, and the WIFI sensitivity or throughput is less than a given threshold, or the like, that is, the NR antenna interferes with the WIFI antenna, a filter circuit including a WIFI notch group is added to a transmitting link where the NR antenna is located; if the NR antenna is in a receiving state, the WIFI antenna is in a transmitting state, and the NR sensitivity or throughput detection system finds that the value is smaller than a given threshold value and the like, namely the WIFI antenna interferes with the NR antenna, an NR notch group is added to a transmitting link where the WIFI antenna is located. More specifically, whether interference exists is detected according to a first detection result, after the interference exists, whether interference signals are NR signals or WIFI signals is determined, a plurality of interference signals are NR signals, and a WIFI filter circuit is accessed in front of a Radio Frequency Integrated Circuit (RFIC) module of an NR radio frequency link, so that signals transmitted by the RFCI module can be filtered; the interference signals are WIFI signals, an NR filter circuit is accessed in front of a WIFI module of a WIFI radio frequency link, so that the signals transmitted by the WIFI module can be filtered, then the interference signals after filtering in a channel are extracted through a coupling link in the circuit, so that the interference signals are attenuated to the maximum extent in the frequency band of the interference signals, meanwhile, the carrier power of the interference signals is inhibited from leaking into the frequency band of the interference signals, and the influence of the interference signals on the reception of the interference signals is reduced.
It should be noted that the filter circuit including the wave trap can suppress the carrier leakage problem of NR and WIFI to a certain extent, and improve the out-of-band suppression capability of the transmission link, so that the adjacent channel interference existing between the adjacent channel interference and the WIFI is suppressed, but the interference problem cannot be completely solved, especially the problem of the same channel interference caused by the adjacent channel interference and the active nonlinear device. Therefore, in the embodiment, when the wave trap cannot solve the interference problem well, the method further provides that the interference cancellation signal is obtained to cancel the influence of the interference signal on the interfered signal. The method comprises the following specific steps:
and 103, simulating the transmission delay of the filtered interference signal to obtain a simulated interference signal of the interference signal synthesized by the n paths of signals.
Specifically, the transmission delay is a delay in a process of transmitting an interference signal from a transmitting antenna to a receiving antenna, and n is a positive integer preset according to an actual situation through simulation of the transmission delay.
It should be noted that, in step 102, sensitivity or throughput data of the antenna detecting the interfered signal is maintained, and after filtering, the value is still found to be smaller than the set threshold, which indicates that interference needs to be further reduced, so that step 103 needs to be continuously performed.
And step 104, performing signal attenuation processing and phase adjustment on the analog interference signal to obtain an interference cancellation signal.
Specifically, the adjustable phase shifter may be used to perform phase adjustment to adapt to phase changes generated by different coupling devices selected for the coupling link used in the step 102 to obtain the interference signal, so as to ensure compatibility of the radio frequency link. And a variable attenuator may be used for signal attenuation processing.
Since the signal attenuation processing is performed to reconstruct the spatial loss of the interference signal during transmission, it is necessary to simulate the spatial loss of the interference signal as much as possible, and since the phase adjustment is performed to allow the interference cancellation signal to cancel the interference signal as much as possible, it is necessary to set the phase difference between the interference cancellation signal and the interference signal to 180 degrees. In the case of no change of the coupling link, the phase switch of the phase path remains unchanged.
And 105, sending the interfered signals subjected to the interference cancellation signal processing to a corresponding radio frequency main link.
Specifically, firstly, an interference cancellation signal and an interfered signal are mixed to cancel the adverse effect of the interference signal on the interfered signal, and then, if the interfered signal is a WIFI signal, the WIFI signal can return to a WIFI radio frequency main link through a pi-type structure switch circuit; if the interfered signal is an NR signal, the signal can return to an NR radio frequency main chain through a pi-type structure switch circuit. The advantages of using a pi-type structure switching circuit are: on one hand, for example, when the NR signal interferes with the WIFI signal, if the channel ch0 on the radio frequency link where the WIFI signal is located is received, the WIFI signal with the NR self-interference signal eliminated may also be returned to another channel ch1 through the pi-type structure switch circuit, and meanwhile, the channel ch1 receives a signal, the WIFI signal with the NR self-interference signal eliminated needs to be returned to the channel ch0 through the pi-type structure switch circuit, so as to provide diversified available paths as much as possible; on the other hand, the on state can also be determined by setting the switching circuit in advance.
Compared with the prior art, the embodiment of the invention detects the working state and the working quality of the NR antenna and the WIFI antenna, acquires the first detection result, can detect whether interference exists according to the first detection result, accesses the filter circuit and extracts the filtered interference signal if the interference exists, can inhibit the carrier leakage problem of the NR and the WIFI through filtering, improves the out-of-band inhibition capability of a transmitting link, further inhibits the adjacent frequency interference existing between the WIFI and the NR, then acquires the simulated interference signal by simulating the transmission delay of the interference signal, then acquires the interference elimination signal with the same size and opposite phase as the interference signal through attenuation processing and phase adjustment, finally transmits the processed interference signal into the radio frequency link corresponding to the interference signal after utilizing the interference elimination signal to eliminate the influence of the interference signal on the interference signal, the influence of interference at the same frequency position of the receiving antenna is further reduced, the interference between NR and WIFI is reduced, the problem that an out-of-band carrier wave is leaked out of a receiving channel can be solved, and the purpose of well inhibiting the interference of radiation interference entering the same frequency position of the receiving antenna caused by the nonlinear factor of a transmitter is achieved.
A second embodiment of the present application relates to a method for reducing NR and WIFI interference, and this embodiment is substantially the same as the first embodiment, except that step 103 is further defined, and a specific flow is shown in fig. 2:
Specifically, step 201 in this embodiment is substantially the same as step 101 in the first embodiment, and therefore, the description thereof is omitted here.
Specifically, step 202 in this embodiment is substantially the same as step 102 in the first embodiment, and therefore, the description thereof is omitted here.
Specifically, the interference signal is a signal that can be regarded as a composite of a plurality of signals. In addition, direct signals exist between the NR antenna and the WIFI antenna, so that interference signals obey rice distribution. Through the single-input multi-output structure circuit diagram shown in fig. 3, n paths of sinusoidal pulse signals with different time delays are synthesized to obtain a preliminary interference analog signal, and only by continuing to perform weighting processing on each path of sinusoidal pulse signal in the synthesized signal, that is, adjusting the amplitude of each path of signal, a signal identical to the interference signal can be obtained through simulation. Further, the time delay time of the n paths of signals is set to be tau1For the initial value, d is the tolerance row of equal differences with n elements, so that only 3 parameters need to be set for performing step 203: initial value tau1The tolerance d and the element number n can realize preliminary simulation of the interference signal, and the method is simple and easy to operate. When the method is applied to a user terminal and the like, due to the limitation of the terminal size and the like, on the premise that the multi-channel signals are controllable, n can be preferably set to be 6, and the reconstruction accuracy of the self-interference signals cannot be influenced. Initial value tau1The determination of (2) is mainly confirmed by the test result of the actual terminal mainboard and simulation experiment simulation.
It should be noted that, in the actual physical structure circuit, the delay time value of each branch in fig. 3 is determined. But WIFI self-interference to NR and NR self-interference to WIFI are not peer-to-peer. Initial value tau1Are different, so FIG. 4 is aA circuit structure with symmetrical structure but asymmetrical physical parameters is disclosed.
And 204, setting n paths of sinusoidal pulse signals according to the time delay time, and synthesizing an analog interference signal.
Specifically, step 205 in this embodiment is substantially the same as step 104 in the first embodiment, and therefore, the description thereof is not repeated here.
Specifically, step 206 in this embodiment is substantially the same as step 105 in the first embodiment, and thus is not described herein again.
Compared with the prior art, on the basis of the first embodiment, due to the n paths of signals with equal time delay intervals, the set parameters are reduced from the number n of paths reconstructed by self-interference to 3 parameters, on the basis that the reconstruction accuracy of the interference signals is not influenced, variable parameters in the signal reconstruction process are greatly reduced, and the complexity of a later-stage optimization algorithm is greatly reduced.
A third embodiment of the present application relates to a method for reducing NR and WIFI interference, which is substantially the same as the first embodiment, except that a wave trap used in filtering is further adjusted, as shown in fig. 4, the method includes:
Specifically, step 401 in this embodiment is substantially the same as step 101 in the first embodiment, and is not repeated here.
And step 402, adjusting the filtering frequency band of the NR wave trap or the WIFI wave trap.
Specifically, the filter circuit is adjusted by adjusting the trap: when the NR signal is an interference signal, adjusting a filtering frequency band of a WIFI wave trap in the WIFI filtering circuit; and when the WIFI signal is an interference signal, adjusting the filtering frequency band of an NR trap in the NR filtering circuit.
And step 403, if the interference is detected according to the first detection result, accessing a corresponding filter circuit and extracting the filtered interference signal.
Specifically, step 403 in this embodiment is substantially the same as step 102 in the first embodiment, and therefore, the description thereof is omitted here.
Specifically, step 404 in this embodiment is substantially the same as step 103 in the first embodiment, and therefore, the description thereof is omitted here.
Specifically, step 405 in this embodiment is substantially the same as step 105 in the first embodiment, and thus is not described herein again.
Specifically, step 406 in this embodiment is substantially the same as step 105 in the first embodiment, and is not repeated here.
Compared with the prior art, the frequency band filtered by the wave trap is finely adjusted on the basis of the first embodiment, so that the problem of carrier leakage under different conditions is solved. In addition, the filtering frequency band is adjusted, so that the inhibiting effect of the wave trap cannot influence the performance of the original transmitting link filter, and the in-band performance of the radio frequency filter is maintained to the maximum extent.
A fourth embodiment of the present application relates to a method for reducing NR and WIFI interference, and this embodiment is substantially the same as the first embodiment, except that step 104 is further defined, as shown in fig. 5, including:
Specifically, step 501 in this embodiment is substantially the same as step 101 in the first embodiment, and therefore, the description thereof is omitted here.
Specifically, step 502 in this embodiment is substantially the same as step 102 in the first embodiment, and therefore, the description thereof is omitted here.
Specifically, step 503 in this embodiment is substantially the same as step 103 in the first embodiment, and is not repeated here.
And step 504, sequentially determining attenuation factors and phase factors corresponding to the n paths of signals.
Specifically, as shown in fig. 6, step 504 specifically includes:
Specifically, taking the NR signal interfering the WIFI signal as an example, if 6 sinusoidal pulse signals are adopted to be synthesized when the signal is simulated, 6 output structures are required to be used in the synthesis process, and therefore the WIFI receiving channel ch0 corresponding to the WIFI receiving channel ch0 of the WIFI signal corresponds to the attenuation factor R0And the phase factor psi0The receiving channel ch1 of WIFI corresponds to the attenuation factor R1And psi1. If it is expressed in a matrix form, it is:
thus, specifically, step 601 generates a random array, and the subsequent calculation is performed by calculating the attenuation factor and the phase factor in each channel.
It should be noted that step 601 actually further includes initializing the signal attenuation value to 0, i.e. considering that the signal on the path is not attenuated.
Specifically, step 604 presents the following three cases:
one is, when the analog interference signal is an analog of the NR signal and the interfered signal is a WIFI signal, the return signal is updated, specifically, the calculation is performed by the following expression:
wherein y (t) is a return signal, S (t) is a WIFI signal, and C (t, r)0i,φ0i) For the part of the analog interference signal corresponding to the ith signal of the n sinusoidal pulse signals forming the analog interference signal, u epsilon [1, n ∈ ]]。
Another case is that, when the analog interference signal is an analog WIFI signal, the interfered signal is an NR signal, and the WIFI antenna of the WIFI signal is a dual antenna that is symmetrical to the NR antenna of the NR signal in physical structure as shown in fig. 7, the return signal is updated, and specifically, the return signal is calculated by the following expression:
In another case, when the analog interference signal is an analog of the WIFI signal, the interfered signal is an NR signal, and the WIFI antenna of the WIFI signal is a dual antenna that is asymmetric to the NR antenna of the NR signal in terms of physical structure as shown in fig. 8, the return signal is updated, and the calculation is specifically performed through the following expression:
And in the third situation, the interference situation generated by the two WIFI transmitting antennas on the NR receiving antenna is converted into a solving mode under the condition of symmetrical antenna structures. The solving complexity of the original problem is reduced to the situation of solving the single antenna interference twice, and the method is very easy for realizing hardware and software algorithm.
It should be noted that the accumulated sign in the above three case expressions means that an attenuation factor (or phase factor) of a signal in n sinusoidal pulse signals is sequentially obtained from small to large according to the delay time, and each obtaining is to subtract the signal corresponding to the last determined attenuation factor (or phase factor) from the previous return signal.
The first attenuation value and the second attenuation value are parameters used for probing in the process of probing the attenuation factors, and the power under different attenuation degrees can be obtained according to the first attenuation value and the second attenuation value.
Specifically, taking the variable attenuator as an example, the maximum attenuation of the general product is 31.5dB, and the attenuation step is 0.5 dB. Respectively calculating first attenuation values r01-up31.5dB and a third attenuation value r01-tempPower value of return signal under the condition of second power P01_upAnd a third power P01_minWherein if r is01-up+r01-downIs an integer, r01-temp＝(r01-up+r01-down)/2. Otherwise r01-temp＝[(r01-up+r01-down)/2]+0.5, wherein, r01-downIs the third attenuation value. Get P01-down，P01_up，P01_minTwo smaller values in, let P be01_min<P01-down<P01_up. Then the assignment is made: r is01-down＝r01-down，r01-up＝r01-temp. If P is01_minIf the value is larger than the other two values, a random number m is generated and assigned: r is a radical of hydrogen01-temp＝m×r01-tempWhere m is e (r)01-down/r01-temp，r01-up/r01-temp)。
Repeating the above steps until r01-up＝r01-downAnd obtaining a corresponding first attenuation value of a certain path of sinusoidal pulse signal.
It should be noted that, each time the first attenuation value of one path of sinusoidal pulse signal is obtained, the first attenuation value is substituted into the expression for obtaining the return signal, the return signal is updated, and then the phase factor corresponding to the path of signal is obtained.
Specifically, step 607 only updates the attenuation factor, so here only the return signal needs to be updated according to the attenuation factor.
Specifically, step 609 is substantially the same as step 606, and is not described herein again.
It should be noted that the range of the phase factor is (-pi, pi).
Specifically, if yes, go to step 612, otherwise, go to step 604.
And 505, performing signal attenuation on the analog interference signal according to the attenuation factor.
Specifically, each path of signal is attenuated by a corresponding attenuation factor.
Specifically, each path of signal is adjusted to a phase determined by the corresponding phase factor.
And 507, sending the interfered signals subjected to the interference cancellation signal processing to a corresponding radio frequency link.
Specifically, step 507 in this embodiment is substantially the same as step 105 in the first embodiment, and is not repeated here.
Compared with the prior art, the present embodiment is based on the first embodiment, because the phase error is not zero
Then, the system initially has the radio frequency self-interference suppression capability. From this conclusion, the optimal parameters of the return signal are most affected by the attenuation factor, andthe signal attenuation and phase adjustment method is provided aiming at the condition that the physical characteristics, the attenuation factor and the phase factor of an actual terminal device are not continuous parameters, is more suitable for the actual condition, and has higher practicability.
A fifth embodiment of the present application relates to a method for reducing NR and WIFI interference, which is substantially the same as the first embodiment, except that the signal attenuation processing and the phase adjustment process need to be adjusted after reducing interference by using an interference cancellation signal, as shown in fig. 9, the method includes:
Specifically, step 901 in this embodiment is substantially the same as step 101 in the first embodiment, and therefore, the description thereof is not repeated here.
And step 902, if the interference is detected to exist according to the first detection result, accessing a filter circuit and extracting a filtered interference signal.
Specifically, step 902 in this embodiment is substantially the same as step 102 in the first embodiment, and therefore, the description thereof is omitted here.
Specifically, step 903 in this embodiment is substantially the same as step 103 in the first embodiment, and is not described here again.
And 904, performing signal attenuation processing and phase adjustment on the analog interference signal to obtain an interference cancellation signal.
Specifically, step 904 in this embodiment is substantially the same as step 104 in the first embodiment, and thus is not described herein again.
Specifically, step 905 in this embodiment is substantially the same as step 101 in the first embodiment, and is not repeated here.
Specifically, if yes, go to step 908, otherwise go to step 907.
More specifically, if it is determined that interference still exists according to the second detection result, the interference cancellation signal is considered to be no longer effective, and adjustment is required; if the interference disappears according to the second detection result, the method for obtaining the interference cancellation signal at present can be continuously used without adjustment.
Specifically, the acquisition of the phase adjustment amplitude and the attenuation amplitude may be the array including the attenuation factor and the value including the phase factor acquired in the third embodiment. In practical application, an A/D converter is added in the circuit, and the target function of the PSO algorithm adopts the following expression:
(w1-n1)2+(w2-n2)2+(w3-n3)2+......+(wx-nx)2
wherein x is the number of sampling points, n1，n2，n3，…，nxFor sampled values of disturbed signals, w1，w2，w3，…，wxAre sampled values of the interference signal.
More specifically, acquiring the interference canceled signal is divided into three time slots in a specific implementation. The first slot is the process of determining the attenuation factor and phase factor as referred to in the third embodiment. The second time slot is a data communication stage, and interference between the NR signal and the WIFI signal is reduced by applying the interference elimination signal, so that communication with better quality is carried out. In view of environmental factors, especially for operation in a long-time WIFI and NR system coexistence scenario, an actual interference signal between the two does not correspond to the interference cancellation signal, and interference with a large influence is generated in the third time slot, so that the process of adjusting and acquiring the interference cancellation signal, that is, adjusting the attenuation factor and the phase factor, in step 1008 needs to be performed.
It should be noted that the PSO algorithm is a preferred scheme, and may actually be other algorithms for obtaining an optimal solution or a local optimal solution, and the embodiment of the present invention does not limit the algorithm.
Specifically, step 907 of the present embodiment is substantially the same as step 105 of the first embodiment, and therefore, the detailed description thereof is omitted here.
Compared with the prior art, on the basis of the first embodiment, the signal attenuation processing and the phase adjustment process are required to be adjusted after the interference is reduced by utilizing the interference cancellation signal, so that the obtained interference cancellation signal is more accurate, the cancellation effect of the interference cancellation signal is better, and the interference between NR and WIFI is further reduced.
It should be noted that "first" and "second" referred to in the above embodiments are for convenience of describing data acquired in different cases, and do not have actual meanings.
In addition, it should be understood that the above steps of the various methods are divided for clarity, and the implementation may be combined into one step or split into some steps, and the steps are divided into multiple steps, so long as the same logical relationship is included in the protection scope of the present patent; it is within the scope of the patent to add insignificant modifications to the algorithms or processes or to introduce insignificant design changes to the core design without changing the algorithms or processes.
A sixth embodiment of the present invention relates to an apparatus for reducing NR and WIFI interference, as shown in fig. 10, including:
the detection module 1001 is configured to detect a working state and a working quality of the NR antenna and the WIFI antenna, and obtain a first detection result.
The filtering module 1002 is configured to access a filtering circuit and extract a filtered interference signal if the interference is detected according to the first detection result of the detecting module.
Specifically, the filtering module employs an NR notch bank and a WIFI notch bank.
The interference cancellation NWIC module 1003 is configured to simulate a transmission delay of an interference signal processed by the filtering module, to obtain a simulated interference signal of the interference signal synthesized by n channels of signals, where n is a preset positive integer, the transmission delay is a delay in a process of transmitting the interference signal from a transmitting antenna to a receiving antenna, perform signal attenuation processing and phase adjustment on the simulated interference signal, to obtain an interference cancellation signal, where a phase difference between the interference cancellation signal and the interference signal is 180 degrees, and send the interfered signal after the interference cancellation signal processing back to a corresponding radio frequency main link.
Specifically, if the WIFI signal interferes with the NR signal, the NWIC module 1003, the antenna for the NR signal, and the antenna for the WIFI signal may be connected as shown in fig. 11. The structure is characterized in that three switches form a pi-shaped structure to be connected with the NWIC module and the NR radio frequency main link, and the structure has the advantages that S1 is independently connected with the radio frequency main link and S2 and S3 are in a disconnected state under the condition that no interference exists in a radio frequency path. When the WIFI interference NR is received, S1 is disconnected, and S2 and S3 are connected, so that the NWIC module 1003 is in an operation mode. Thereby achieving self-interference cancellation and NR antenna reception parallelism. Since NR is usually received by four MIMO receiving channels, each channel needs to be configured to connect to NWIC module 1003. Different from the NR interference WIFI receiving antenna, the signal processed by the NWIC module 1003 has 24 output paths according to the symmetry principle, and the configuration thereof has great flexibility. Sending the interference cancellation signal back to the radio frequency main link may be performed through a pi-type switch circuit structure as shown in fig. 12, where the sign position in each radio frequency main channel in the pi-type switch circuit structure is between the NR receiving antenna and the radio frequency front end filter, and if the NR signal interferes with the WIFI signal, the operation is substantially similar to that described above, and details are not repeated here.
It should be understood that this embodiment is a device embodiment corresponding to the first embodiment, and the embodiment can be implemented in cooperation with the first embodiment. The related technical details mentioned in the first embodiment are still valid in this embodiment, and are not described herein again in order to reduce repetition. Accordingly, the related-art details mentioned in the present embodiment can also be applied to the first embodiment.
It should be noted that, all modules involved in this embodiment are logic modules, and in practical application, one logic unit may be one physical unit, may also be a part of one physical unit, and may also be implemented by a combination of multiple physical units. In addition, in order to highlight the innovative part of the present invention, a unit which is not so closely related to solve the technical problem proposed by the present invention is not introduced in the present embodiment, but this does not indicate that there is no other unit in the present embodiment.
A seventh embodiment of the present invention relates to an electronic apparatus, as shown in fig. 11, including:
at least one processor 1101; and the number of the first and second groups,
a memory 1102 communicatively connected to the at least one processor 1101; wherein the content of the first and second substances,
the memory 1102 stores instructions executable by the at least one processor 1101 to enable the at least one processor 1101 to perform the method for reducing NR and WIFI interference according to the first to fifth embodiments of the present invention.
Where the memory and processor are connected by a bus, the bus may comprise any number of interconnected buses and bridges, the buses connecting together one or more of the various circuits of the processor and the memory. The bus may also connect various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface provides an interface between the bus and the transceiver. The transceiver may be one element or a plurality of elements, such as a plurality of receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. The data processed by the processor is transmitted over a wireless medium through an antenna, which further receives the data and transmits the data to the processor.
The processor is responsible for managing the bus and general processing and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And the memory may be used to store data used by the processor in performing operations.
An eighth embodiment of the present invention relates to a computer-readable storage medium storing a computer program. The computer program realizes the above-described method embodiments when executed by a processor.
That is, as can be understood by those skilled in the art, all or part of the steps in the method for implementing the embodiments described above may be implemented by a program instructing related hardware, where the program is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps of the method described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the present application, and that various changes in form and details may be made therein without departing from the spirit and scope of the present application in practice.
Claims (12)
1. A method for reducing NR and WIFI interference, comprising:
detecting the working states and the working qualities of the NR antenna and the WIFI antenna to obtain a first detection result;
if the interference exists according to the first detection result, accessing a filter circuit and extracting a filtered interference signal;
simulating the transmission delay of the filtered interference signal to obtain a simulated interference signal of the interference signal synthesized by n paths of signals, wherein n is a preset positive integer, and the transmission delay is the delay of the interference signal in the process of transmitting from a transmitting antenna to a receiving antenna;
performing signal attenuation processing and phase adjustment on the analog interference signal to obtain an interference cancellation signal, wherein the phase difference between the interference cancellation signal and the interference signal is 180 degrees;
and sending the interfered signals processed by the interference cancellation signals to a corresponding radio frequency main link.
2. The method of claim 1, wherein simulating the transmission delay of the filtered interference signal to obtain a simulated interference signal of the interference signal synthesized from n signals comprises:
setting an arithmetic sequence containing n elements, and determining the time delay time of n paths of signals according to the arithmetic sequence;
and setting n paths of sinusoidal pulse signals according to the time delay time, and synthesizing the analog interference signal.
3. The method of claim 1, wherein the performing signal attenuation processing and phase adjustment on the analog interference signal to obtain an interference cancellation signal comprises:
sequentially determining attenuation factors and phase factors corresponding to the n paths of signals;
performing signal attenuation on the analog interference signal according to the attenuation factor;
and adjusting the phase of the attenuated analog interference signal according to the phase factor to obtain the interference cancellation signal.
4. The method of claim 3, wherein the sequentially determining the attenuation factor and the phase factor corresponding to the n signals comprises:
determining a randomly generated phase value as the initial phase factor of the analog interference signal;
setting the attenuation factor of the analog interference signal;
obtaining an interfered signal and determining a return signal according to the interfered signal and the analog interference signal;
updating the return signal according to the current attenuation factor and the current phase factor;
taking the power value of the return signal as a first power;
obtaining a first attenuation value and a second attenuation value of a signal for which the attenuation factor and the phase factor are not determined, calculating a second power and a third power of the return signal from the first attenuation value and the second attenuation value, and updating the first attenuation value and the second attenuation value from the first power, the second power, and the third power until the first attenuation value and the second attenuation value are equal; updating the first attenuation value to the attenuation factor of the respective signal;
updating the return signal according to the current attenuation factor;
after the attenuation factor is determined by the signal without the determined attenuation factor and the phase factor, acquiring a corresponding first phase value and a corresponding second phase value, calculating fourth power and fifth power of the analog interference signal processed by the attenuation factor according to the first phase value and the second phase value, and updating the first phase value and the second phase value according to the first power, the fourth power and the fifth power until the first phase value and the second phase value are equal;
and updating the first phase value to the phase factor, and executing the step of updating the return signal according to the current attenuation factor and the current phase factor until the attenuation factor and the phase factor corresponding to the n paths of signals are obtained.
5. The method of claim 4, wherein said calculating a second power and a third power of the return signal from the first attenuation value and the second attenuation value comprises,
detecting whether a sum of the first attenuation value and the second attenuation value is an integer;
if so, determining the average value of the first attenuation value and the second attenuation value as a third attenuation value;
if not, determining the sum of the value obtained by rounding the average value of the first attenuation value and the second attenuation value and a preset attenuation increment as the third attenuation value;
determining the power of the return signal after attenuation under the first attenuation value as the second power;
determining the power of the return signal after attenuation at the third attenuation value as the third power;
said updating said first attenuation value and said second attenuation value as a function of said first power, said second power, and said third power comprises,
sorting the first power, the second power and the third power from large to small;
if the third power is in the first order, generating a random number x, and updating the product of x and a third attenuation value to be the third attenuation value;
calculating a third power corresponding to a current third attenuation value, and sequencing the first power, the second power and the third power from large to small;
if the third power is still in the first order, returning to the step of detecting whether the sum of the first attenuation value and the second attenuation value is an integer;
if not, updating the first attenuation value and the second attenuation value;
and respectively updating the first attenuation value and the second attenuation value as attenuation factor values corresponding to two smaller values of the first power, the second power and the third power which are sequenced from large to small.
6. The method of claim 4, wherein the analog interference signal is composed of n sinusoidal pulse signals,
if the analog interference signal is an analog NR signal and the interfered signal is a WIFI signal, the update return signal is specifically calculated by the following expression:
if the analog interference signal is an analog of the WIFI signal, the interfered signal is the NR signal, and the WIFI antenna of the WIFI signal is a dual antenna that is physically symmetric to the NR antenna of the NR signal, the update return signal is specifically calculated by the following expression:
if the analog interference signal is an analog of the WIFI signal, the interfered signal is the NR signal, and the WIFI antenna of the WIFI signal is a dual antenna that is not symmetric to the NR antenna of the NR signal in physical structure, the update return signal is specifically calculated by the following expression:
7. The method of claim 3, further comprising:
detecting the working states and the working qualities of the NR antenna and the WIFI antenna after the interference cancellation signal processes the interfered signal, and acquiring a second detection result;
judging whether the interference cancellation signal is effective or not according to the second detection result;
if not, taking the attenuation factor and the phase factor as new initial values, obtaining an optimal solution of the phase adjustment amplitude and the attenuation amplitude by utilizing a Particle Swarm Optimization (PSO) algorithm and updating the interference cancellation signal according to the optimal solution, wherein an objective function of the PSO algorithm is
(w1-n1)2+(w2-n2)2+(w3-n3)2+......+(wx-nx)2
x is the number of sampling points, n1，n2，n3，…，nxFor sampled values of disturbed signals, w1，w2，w3，…，wxIs a sampled value of the interference signal.
8. The method of claim 1, wherein the filter circuit is an NR filter circuit carrying a WIFI trap or a WIFI filter circuit carrying an NR trap, and wherein the accessing the filter circuit comprises:
if the WIFI antenna interferes with the NR antenna, accessing the NR filter circuit to a main link where the WIFI antenna is located;
and if the NR antenna interferes with the WIFI antenna, accessing the WIFI filter circuit to a main link where the NR antenna is located.
9. The method of claim 8, wherein before accessing the filter circuit, further comprising:
and adjusting the filtering frequency band of the NR trap or the WIFI trap.
10. An apparatus for reducing NR and WIFI interference, comprising:
the detection module is used for detecting the working states and the working qualities of the NR antenna and the WIFI antenna and acquiring a first detection result;
the filtering module is used for accessing a filtering circuit and extracting a filtered interference signal if the interference is detected to exist according to the first detection result of the detection module;
the interference elimination NWIC module is used for simulating the transmission time delay of the interference signal after the processing of the filtering module, acquiring a simulated interference signal of the interference signal synthesized by n paths of signals, wherein n is a preset positive integer, the transmission time delay is the time delay of the interference signal in the process of transmitting the interference signal to a receiving antenna from a transmitting antenna, and performing signal attenuation processing and phase adjustment on the simulated interference signal to acquire an interference cancellation signal, wherein the phase difference between the interference cancellation signal and the interference signal is 180 degrees, and the interference signal subjected to the processing of the interference cancellation signal is sent back to a corresponding radio frequency main link.
11. An electronic device, comprising:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of reducing NR and WIFI interference of any of claims 1 to 9.
12. A computer-readable storage medium, storing a computer program, wherein the computer program, when executed by a processor, implements the method of reducing NR and WIFI interference of any of claims 1 to 9.
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| PCT/CN2021/123056 WO2022142575A1 (en) | 2020-12-30 | 2021-10-11 | Method and apparatus for reducing nr and wifi interference, and device and storage medium |
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| CN115694546A (en) * | 2022-09-09 | 2023-02-03 | 荣耀终端有限公司 | Antenna control method, electronic equipment and computer storage medium |
| CN116208304A (en) * | 2023-04-28 | 2023-06-02 | 无锡智鸿达电子科技有限公司 | Method, device, medium and electronic equipment for checking signal quality of transceiver |
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| CN115866436B (en) * | 2023-02-24 | 2023-07-25 | 荣耀终端有限公司 | Communication circuit and related device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102571655B (en) * | 2012-01-21 | 2014-12-17 | 华为技术有限公司 | Method and device for implementing interference cancellation and filters |
| US9490963B2 (en) * | 2013-02-04 | 2016-11-08 | Kumu Networks, Inc. | Signal cancellation using feedforward and feedback paths |
| US20150065064A1 (en) * | 2013-08-30 | 2015-03-05 | Qualcomm Incorporated | Active interference cancellation in analog domain |
| CN104779971A (en) * | 2014-11-07 | 2015-07-15 | 哈尔滨工业大学深圳研究生院 | Non-linear digital self-interference cancellation method combined with simulation cancellation algorithm |
| CN105187093A (en) * | 2015-09-18 | 2015-12-23 | 哈尔滨工业大学深圳研究生院 | LTE full-duplex system self-interference cascade offsetting method |
| US20200021327A1 (en) * | 2018-07-13 | 2020-01-16 | Qualcomm Incorporated | Transmit filter bypass for multi-antenna transceiver |
| CN109600173B (en) * | 2018-11-09 | 2021-08-17 | Oppo广东移动通信有限公司 | Interference processing method and device, electronic equipment and storage medium |
| CN111092632B (en) * | 2019-12-03 | 2022-04-05 | 成都众志天成科技有限公司 | Interference suppression method and interference suppressor |
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| CN115694546A (en) * | 2022-09-09 | 2023-02-03 | 荣耀终端有限公司 | Antenna control method, electronic equipment and computer storage medium |
| CN115694546B (en) * | 2022-09-09 | 2023-11-07 | 荣耀终端有限公司 | Antenna control method, electronic equipment and computer storage medium |
| CN116208304A (en) * | 2023-04-28 | 2023-06-02 | 无锡智鸿达电子科技有限公司 | Method, device, medium and electronic equipment for checking signal quality of transceiver |
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