WO2020220196A1

WO2020220196A1 - Method and apparatus for controlling harmonic interference

Info

Publication number: WO2020220196A1
Application number: PCT/CN2019/084991
Authority: WO
Inventors: 金麟; 张治�; 邢金强; 张中山; 徐海祥
Original assignee: Oppo广东移动通信有限公司
Priority date: 2019-04-29
Filing date: 2019-04-29
Publication date: 2020-11-05
Also published as: CN110731054B; CN110731054A

Abstract

Disclosed in embodiments of the present application are a method and apparatus for controlling harmonic interference. The method is applicable to a dual-connectivity communication system. The method comprises: collecting, from a first uplink signal of first connectivity belonging to dual connectivity transmitted by a transmitter, a first harmonic interference signal causing harmonic interference to a downlink signal of second connectivity belonging to the dual connectivity; adjusting the first harmonic interference signal to a target amplitude and a target phase; and superposing the adjusted first harmonic interference signal with a received signal received by a receiver to control a second harmonic interference signal generated by transmission of the first uplink signal in the received signal, the received signal comprising the downlink signal and the second harmonic interference signal. The method and apparatus provided in the embodiments of the present application are low in complexity, do not increase the size of a terminal device, and can effectively control harmonic interference.

Description

Method and device for controlling harmonic interference

Technical field

The embodiments of the present application relate to the field of communications, and in particular to a method and device for controlling harmonic interference.

Background technique

With the evolution of communication systems, terminal equipment usually needs to achieve dual-receiving and dual-transmitting under dual connections. In this case, the nonlinearity of the internal radio frequency components of the terminal equipment may cause the terminal equipment to have self-interference problems. The wave interference problem is more serious. In the related art, harmonic interference is reduced by adding an electromagnetic shield structure, but this will increase the volume of the terminal device.

Summary of the invention

The embodiments of the present application provide a method and device for controlling harmonic interference, which are beneficial to eliminate harmonic interference existing in dual-connection communication.

In a first aspect, a method for controlling harmonic interference is provided. The method is applied to a dual-connected communication system, and the method includes: transmitting from a transmitter the first uplink of the first connection of the dual-connected Among the signals, the first harmonic interference signal that causes harmonic interference to the downlink signal belonging to the second connection of the dual connection is collected; the first harmonic interference signal is adjusted to the target amplitude and target phase; the adjusted The first harmonic interference signal is superimposed with the received signal received by the receiver to control the second harmonic interference signal generated by the transmission of the first uplink signal in the received signal, and the received signal Including the downlink signal and the second harmonic interference signal.

In a second aspect, a device for controlling harmonic interference is provided. The device is applied to a dual-connected communication system and includes: a first signal acquisition module for transmitting from a transmitter belonging to the first dual-connected first In the first uplink signal of the connection, the first harmonic interference signal that causes harmonic interference to the downlink signal belonging to the second connection of the dual connection is collected; the first signal adjustment module is used to adjust the first harmonic The interference signal is adjusted to the target amplitude and the target phase; the first combiner is used to superimpose the adjusted first harmonic interference signal with the received signal received by the receiver to control the frequency of the received signal The second harmonic interference signal generated by the transmission of the first uplink signal, and the received signal includes the downlink signal and the second harmonic interference signal.

Through the above technical solution, a signal with a specific amplitude and a specific phase is constructed based on the harmonic interference signal collected from the uplink signal to superpose the received signal, thereby being able to suppress the harmonic interference signal in the received signal, with low complexity and no increase in terminals The size of the equipment, and can effectively control harmonic interference.

These and other aspects of the application will be more concise and understandable in the description of the following embodiments.

Description of the drawings

Fig. 1 shows a schematic block diagram of a device for controlling harmonic interference provided by an embodiment of the present application.

Fig. 2 shows a structural diagram of a device for controlling harmonic interference provided by an embodiment of the present application.

Figure 3 shows a schematic block diagram of the signal acquisition module.

Fig. 4 shows a schematic block diagram of the signal adjustment module.

Figure 5 shows a schematic block diagram of the power detection module and the feedback control module.

Fig. 6 shows another schematic block diagram of the signal adjustment module.

Fig. 7 shows a working sequence diagram of the device for controlling harmonic interference provided by an embodiment of the present application.

Fig. 8 shows a schematic block diagram of a method for controlling harmonic interference provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are a part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

It should be understood that the technical solutions of the embodiments of this application can be applied to various communication systems, such as: Global System of Mobile Communication (GSM) system, Code Division Multiple Access (CDMA) system, and broadband code Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution LTE system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (Time Division Duplex, TDD), Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, New Radio (NR) or future 5G System etc.

In particular, the technical solutions of the embodiments of this application can be applied to various communication systems based on non-orthogonal multiple access technologies, such as sparse code multiple access (SCMA) systems, low density signatures (Low Density Signature, LDS) system, etc. Of course, the SCMA system and LDS system can also be called other names in the communication field; further, the technical solutions of the embodiments of the present application can be applied to multi-carrier transmission using non-orthogonal multiple access technology System, such as non-orthogonal multiple access technology Orthogonal Frequency Division Multiplexing (OFDM), Filter Bank Multi-Carrier (FBMC), Generalized Frequency Division Multiplexing (Generalized Frequency Division Multiplexing, OFDM) Division Multiplexing, GFDM), filtered orthogonal frequency division multiplexing (Filtered-OFDM, F-OFDM) system, etc.

Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communications, but also multi-connection communications. For example, in the process of 5G system construction, the use of 5G-NR and 4G-LTE joint networking can achieve full coverage of the 5G network in a short time. This requires terminal equipment to support LTE and NR dual-connection technology, and to simultaneously receive and send 4G and 5G signals. In this case, the non-linearity of the radio frequency device may cause self-interference in the terminal equipment, that is, the non-linear interference of the 4G uplink signal of the terminal equipment may affect the 5G downlink signal. The non-linear interference here mainly includes harmonic interference, intermodulation interference and mixing interference. Among them, the proportion of harmonic interference is relatively large. Therefore, how to control harmonic interference is a key issue in dual-connection communication.

The current solutions to the problem of harmonic interference include improving the performance indicators of radio frequency front-end devices, adding interference cancellation circuits, uplink and downlink frequency division scheduling, and uplink and downlink time division scheduling.

(1) Improve the performance of radio frequency devices

The fundamental cause of terminal harmonic interference lies in the nonlinearity of the device. Therefore, improving the performance of the device is the most fundamental way to reduce terminal harmonic interference. By studying the relationship between device nonlinearity and related performance indicators, optimize the related performance indicators to reduce device nonlinearity. In addition, a harmonic filter can be added to the PA output to suppress harmonics. This method is simple to implement and has low cost, but by adding a filter, only part of the harmonic interference signal output by the transmitting antenna can be eliminated, and the harmonic signal of the PA output PCB cannot be completely suppressed. Therefore, consider this method and other methods Synergy and comprehensive use. In addition, there are great technical difficulties in improving the performance of the device, the development cycle is long, and the cost is high; adding a harmonic filter after the PA can only suppress the harmonic interference under the conduction path, but cannot suppress the harmonic interference caused by PCB radiation.

(2) Increase interference cancellation processing

Refer to full-duplex self-interference cancellation methods, such as analog domain cancellation and digital domain cancellation. Analog circuit domain self-interference cancellation rebuilds the self-interference signal through analog circuit design and directly subtracts the reconstructed self-interference signal from the received signal. The digital domain self-interference cancellation method mainly relies on parameter estimation and reconstruction of the self-interference, and then subtracting the reconstructed self-interference from the received signal to eliminate the residual self-interference. Regardless of whether it is analog cancellation or digital cancellation, a special time slot is required for training, so it cannot be completed based on the current wireless frame structure.

(3) Frequency division scheduling

Determine the frequency resource allocated in the downlink according to the uplink allocation result. For example, do not use the frequency spectrum corresponding to the harmonic main lobe, reduce the frequency of use of the frequency spectrum corresponding to the harmonic side lobe, and use the frequency spectrum corresponding to the non-harmonic signal. This method requires network transformation, and may reduce the peak rate of the network due to avoiding interference spectrum.

(4) Time division scheduling

Time division scheduling is performed according to the ratio of uplink and downlink time slots. The network provides the ratio of uplink and downlink time slots, and the terminal reasonably controls the transmission and reception according to the ratio. For example: when 4G-LTE is sent, the 5G-NR side suspends reception. Time division scheduling needs to turn off the reception of the 5G-NR end when transmitting on the 4G-LTE end, which will reduce the throughput of the system.

In addition, the related art also adopts the method of adding electromagnetic shielding cover to reduce the harmonic interference, but this method will increase the volume of the terminal equipment, so that the upper limit of reducing the volume of the terminal equipment is greatly reduced.

In view of the foregoing problems, the embodiments of the present application provide a method and device for controlling harmonic interference, which can effectively control the harmonic interference caused by the uplink signal to the downlink signal.

Fig. 1 shows a schematic block diagram of an apparatus 100 for controlling harmonic interference according to an embodiment of the present application. As shown in Fig. 1, the device 100 may include part or all of the following contents:

The first signal acquisition module 110 is configured to collect, from the first uplink signal belonging to the first connection of the dual connection transmitted by the transmitter, the signals that cause harmonic interference to the downlink signal belonging to the second connection of the dual connection The first harmonic interference signal;

The first signal adjustment module 120 is configured to adjust the first harmonic interference signal to a target amplitude and target phase;

The first combiner 130 is used to superimpose the adjusted first harmonic interference signal with the received signal received by the receiver to control the received signal generated by the transmission of the first uplink signal The second harmonic interference signal, the received signal includes the downlink signal and the second harmonic interference signal.

The so-called harmonic interference is to transmit signals on the transmitting frequency band f0, and if the receiving frequency band is just n*f0 (n=2,3,4.....), the receiver will be affected by harmonics, which will lead to the receiver Decrease in sensitivity. Typically, if the frequency band of the uplink signal sent by LTE is 1.75G, the frequency band of the downlink signal received by NR is 3.5G. Those skilled in the art understand that the uplink signal may be a signal sent by the terminal device to the network device, and the downlink signal may be the signal sent by the network device to the terminal device.

It should be understood that the solution of the embodiment of the present application can be applied not only to a dual-connected communication system, but also to other communication systems, as long as the receiving frequency band of the downlink signal and the sending frequency band of the uplink signal are in a multiplication relationship.

It should also be understood that the "first signal acquisition module" appearing in the embodiments of the present application and the "second signal acquisition module" appearing below may use the same device or different devices in physical implementation. The "first signal adjustment module" and the "second signal adjustment module" appearing below may use the same device or different devices in terms of physical implementation. Similarly, the "first combiner" and the "second combiner" can be the same or different.

For ease of description, in the embodiments of the present application, the "first signal acquisition module" and the "second signal acquisition module" can be collectively referred to as the "signal acquisition module", and the "first signal adjustment module" and the "second signal adjustment module" can be collectively referred to as As the "signal adjustment module", the "first combiner" and the "second combiner" are collectively referred to as the "combiner".

Specifically, the uplink signal transmitted by the transmitter may pass through nonlinear devices such as a power amplifier (PA). At this time, the uplink signal carries a harmonic interference signal that causes self-interference with the downlink signal received by the receiver. The uplink signal is directly transmitted through the transmitting antenna, and the downlink signal being received by the receiver is affected by the harmonic interference signal, which means that the receiver not only receives the downlink signal, but also the harmonic interference in the uplink signal. signal. In the embodiment of the present application, the harmonic interference signal can be collected from the uplink signal after passing through the nonlinear device, and the harmonic interference signal can be adjusted, for example, the amplitude and/or phase of the Adjust to the same amplitude and opposite phase as the harmonic interference signal before adjustment (that is, the harmonic interference signal that the receiver may receive). In this way, the received signal (which can include downlink signals and unadjusted harmonic interference signals) received by the receiver is adjusted to the harmonic interference signal output by the signal adjustment module (adjusted to the same amplitude and opposite phase as the previous harmonic. After the interference signal is superimposed by the combiner, a pure downlink signal can be obtained. Under ideal conditions, by setting the signal adjustment module, the harmonic interference signal before input can be adjusted to a harmonic interference signal with equal amplitude and opposite phase. But in fact, the signal adjustment module may have characteristics such as delay. The actual output harmonic interference signal is often different from the harmonic interference signal output under ideal conditions. Therefore, when setting the signal adjustment module, you can refer to the signal adjustment module's The characteristic sets the amplitude and phase. For example, if the characteristic of the signal adjustment module is that the pass will attenuate a certain value, the amplitude of the signal adjustment module can be set to the amplitude of the first harmonic interference signal + the certain value of the attenuation. Alternatively, the harmonic interference signal output from the signal adjustment module and the received signal received by the receiver can be superimposed by the combiner in real time, and the control harmonic can be judged according to the power value of the output signal of the combiner. The effect of wave interference signals. For example, detecting the power value of the output signal of the combiner, and if the obtained power value meets the sensitivity of the receiver, the amplitude and phase set by the signal adjustment module at this time can be used as the target amplitude and target phase in the embodiment of the present application. If the power value obtained does not meet the sensitivity of the receiver, you can control the chip to further fine-tune the amplitude and phase of the signal adjustment module, and then detect the power value of the output signal of the combiner again to see if it meets the requirements of the receiver After the sensitivity of the receiver is satisfied, the signal output by the combiner can be processed in the next step. For example, digital processing.

Generally, the devices for controlling harmonic interference studied are for terminal equipment, and the essential cause of harmonic interference of terminal equipment lies in the nonlinearity of the device. Therefore, the traditional method of controlling harmonic interference is to improve the performance of the device. However, its effect depends on the study of the behavior model of the power amplifier. The accuracy of the modeling has a direct impact on the result. In reality, the nonlinear characteristics produced by different power amplifiers are not the same, which greatly increases the difficulty of modeling. In addition, the current commonly used method to reduce harmonic interference is to increase the structure of the electromagnetic shielding cover, but this will increase the volume of the terminal equipment, which is not conducive to the realization of the reduction of the volume of the terminal equipment. However, the device provided by the embodiment of the present application has low complexity, does not increase the volume of terminal equipment, and can effectively control harmonic interference.

It can be seen from the above description that the device may further include: a training module for training to obtain the target amplitude and the third harmonic interference signal collected from the second uplink signal belonging to the first connection Target phase.

If the target amplitude and target phase are obtained through real-time training, the second uplink signal and the first uplink signal may be the same uplink signal.

If the target amplitude and target phase are trained in advance and stored in the signal adjustment module, the second uplink signal and the first uplink signal are different uplink signals. During this period, the receiver may not receive the downlink signal. For example, the target amplitude and target phase may be obtained by training during the factory stage, the power-on stage of the terminal device, or the idle time stage of the terminal device. It should be noted that training amplitude and phase is preferred but not necessary when the receiver does not receive downlink signals.

Optionally, in the embodiment of the present application, the training module includes: a second signal acquisition module, configured to collect, from the second uplink signal transmitted by the transmitter, a pair of downlink signals belonging to the second connection The third harmonic interference signal that causes harmonic interference; the second signal adjustment module is used to adjust the amplitude and phase of the third harmonic interference signal; the second combiner is used in the receiver In the case of receiving a downlink signal, superimpose the adjusted third harmonic interference signal with the fourth harmonic interference signal received by the receiver and generated by the transmission of the second uplink signal; a power detection module, Used to detect the power value of the signal to be detected after the adjusted third harmonic interference signal and the fourth harmonic interference signal are superimposed by the second combiner; a feedback control module is used to The power value of the signal to be detected detected by the power detection module is trained to obtain the target amplitude and target phase.

For ease of description, the working sequence of the device in the embodiment of the present application can be divided into a training phase and a normal communication phase. In the normal communication stage, the above receiver receives the downlink signal and reduces or eliminates the harmonic interference signal that interferes with the downlink signal through this device. In the training phase, the device can be trained to obtain the target amplitude and target phase used in the normal communication phase.

In the training phase, the signal acquisition module can collect the harmonic interference signal from the uplink signal after the nonlinear device, and use the signal adjustment module to adjust the harmonic interference signal, for example, adjust its amplitude and/or phase , And superimpose the adjusted harmonic interference signal with the harmonic interference signal received by the receiver (which can be regarded as the harmonic interference signal before adjustment) in the combiner and output it, and then the output of the combiner through the power detection module The signal is detected, and the detected power value is fed back to the feedback control module, and then the signal adjustment module can be controlled by the feedback control module. If the feedback control module determines that the amplitude and phase of the harmonic interference signal adjusted by the signal adjustment module meets the sensitivity of the receiver according to the detected power value, the feedback control module can control the signal adjustment module to store the current amplitude and phase. The stored amplitude and phase are the target amplitude and target phase. If the feedback control module judges that the harmonic interference signal adjusted by the signal adjustment module still does not meet the sensitivity of the receiver based on the detected power value, the feedback control module can control the signal adjustment module to reset the amplitude and phase until it is satisfied The amplitude and phase of the receiver sensitivity are the target amplitude and target phase mentioned in this article.

Optionally, during the training phase, the selection of the uplink signal and the generation of the target phase and target amplitude can be expanded as follows:

First, the power value of the uplink signal can be changed, that is to say, multiple uplink signals with different power values can be transmitted, and harmonic interference signals can be collected from them, and finally used to train the harmonic interference of the target amplitude and target phase. The power value of the signal may be the average value of the sum of the power values of the collected multiple harmonic interference signals. The harmonic interference signal collected in the normal communication phase is as equal as possible to the power value of the harmonic interference signal used in the training phase. In this way, data transmission can be better carried out during the normal communication phase.

Second, the working frequency of the uplink signal can be changed. If the bandwidth is relatively large, the working frequency of the uplink signal can be changed. Different working frequency or different working frequency bands can train a set of target amplitude and target phase. In the normal communication phase, a set of suitable target amplitude and target phase can be selected according to the working frequency or working frequency of the uplink signal. For example, you can select equally spaced working frequency points, such as 5MHz in 1710-1780MHz, select the working frequency point of the uplink signal, so as to provide multiple sets of parameters suitable for different working frequency points for the training model generated later. The terminal equipment adaptively selects the model according to the actual operating frequency.

Optionally, in the embodiment of the present application, the signal acquisition module can be implemented by a coupler, and further, a filter can be connected after the coupler, so that relatively pure harmonic interference signals can be collected.

Optionally, in the embodiment of the present application, the signal adjustment module may include an amplitude adjustment module and a phase adjustment module. The amplitude adjustment module may be implemented by an attenuator, and the phase adjustment module may be implemented by a phase shifter.

It should be noted that the first uplink signal and the second uplink signal in the embodiment of the present application belong to the same connection, and are different from the connection to which the downlink signal belongs. It can also be said that the first uplink signal and the second uplink signal are transmitted in the same frequency band, while the downlink signal is received in different frequency bands.

The architecture of the apparatus of the embodiment of the present application will be described in detail below in conjunction with FIG. As shown in Figure 2, after the uplink signal transmitted from the transmitter passes through the power amplifier PA, the uplink signal can be directly transmitted through the transmitting antenna. In addition, a coupler can be used to couple a part of the uplink signal with nonlinear characteristics. After filtering by a filter, an attenuator and a frequency shifter are used to construct a harmonic interference signal of equal amplitude and inverse phase, and finally connect with the receiver The received signal is superimposed, so that the harmonic interference signal in the signal received by the receiver can be cancelled. 3 to 5 show schematic diagrams of various functional modules in FIG. 2. The flow of each functional module will be described in detail below in conjunction with FIGS. 3 to 5.

Figure 3 shows a schematic block diagram of the signal acquisition module. The above first harmonic interference signal or third harmonic interference signal is collected after non-linear devices such as PA, and a part of the interference signal is collected through the coupler. In order not to cause interference to the signal received by the receiver, The original signal should be eliminated. The power of the second harmonic interference signal in this segment of the signal has a 35-40dB drop relative to the original transmitted signal. Because the frequency bands are far apart, the original signal can be filtered out simply and effectively by using a filter. Only pure harmonic interference signals are left for later processing.

Fig. 4 shows a schematic block diagram of the signal adjustment module. Used to construct harmonic interference signals with equal amplitude and opposite phase. Since the second harmonic power in the actual terminal is small, the attenuator is used to attenuate the coupled harmonic interference signal. Since the actual interference part is relatively stable, the power range can be calculated more accurately during the training phase, and its range can be It is controlled near the median value of the attenuator, and the adjustable attenuator is used to fine-tune the amplitude in the working state, thereby reducing the influence of external factors such as temperature and pressure. The phase shifter is used to adjust the signal phase, so that the adjusted harmonic interference signal is opposite to the harmonic interference signal received by the receiver when the combiner is superimposed and eliminated. At this point, the "inverse signal" with the opposite phase and amplitude of the receiver is obtained, so that the two signals can be superimposed and eliminated.

Figure 5 shows a schematic block diagram of the power detection module and the feedback control module. Among them, the power detection module is used to detect the power value of the signal after superposition and cancellation. A coupler can be used to couple out a part of the superimposed signal output by the final combiner. Although there may be only pure second harmonic interference signals in the signal adjustment module, because there are more signals in each frequency band in the received signal, a bandpass filter is used , Only the frequency band of the second harmonic that will cause interference to the 5G downlink signal is reserved. The fixed-gain amplifier (ie, the low-noise amplifier in Figure 5) and the attenuator are combined to make the coupled signal match the range of the subsequent power detector. The power detector converts the power of the signal into a voltage value, and then The analog-digital converter (Analog-Digital Converter, ADC) converts into a digital signal and sends it to the main control chip (that is, the feedback control module in FIG. 2) for control calculation.

Optionally, the main control chip may be any processor capable of performing arithmetic processing in the terminal device, for example, may be a Field-Programmable Gate Array (FPGA).

Optionally, in the embodiment of the present application, the signal adjustment module may include a power divider and multiple adjustment units, that is, the signal adjustment module may include a power divider, multiple routing attenuators, and phase shifters. The adjustment unit. And the multiple adjustment units can be controlled by radio frequency switches. For example, as shown in Figure 6, the signal adjustment module includes radio frequency switch A, radio frequency switch B, and radio frequency switch C. The power divider is used to divide the harmonic interference signal collected by the signal acquisition module into multiple harmonic interference signals. The power values of the multiple harmonic interference signals are equal to the power values of the harmonic interference signals collected by the signal acquisition module. Each adjustment unit adjusts the amplitude and phase of a harmonic interference signal divided by the power divider. For the training phase, each adjustment unit must train the corresponding target amplitude and target phase. In this way, in the normal communication stage, the harmonic interference signal adjusted by each adjustment unit can better eliminate the harmonic interference signal received by the receiver.

Specifically, in the training phase, the control chip can sequentially train the target amplitude and target phase corresponding to each adjustment unit with the radio frequency switch. For example, the control chip can first turn on the radio frequency switch A, turn off the radio frequency switches B and C, and the device runs a single channel amplitude and phase adjustment to find the best advantage of this channel when it works alone, and then open the radio frequency switches A and B at the same time, and turn off the radio frequency switch C. , While keeping the path where the RF switch A is running at the best point, run the adaptive matching algorithm for path B, and finally turn on the RF switches A, B, and C at the same time, and run the matching algorithm for the path where the RF switch C is located, so that the system The self-interference of harmonics is the best elimination effect. In the normal communication phase, the transmitter and receiver normally send and receive signals. The parameter values of all adjustment units in the device maintain the same optimal parameter values as those in the training phase, so that the terminal equipment can perform data transmission normally while eliminating self-interference. The so-called best points on each path refer to the most suitable target phase and target amplitude. Its working sequence is shown in Figure 7, including a training phase and a normal communication phase. The training phase includes training on three paths (path 1, path 2, and path 3).

Optionally, the terminal device may only be trained once at the factory stage, and use the target phase and target amplitude trained at the factory for each subsequent normal communication stage. The terminal device may also perform training once in each idle phase, and update the target phase and target amplitude obtained by the training, which is not limited in the embodiment of the present application.

It should be understood that the number of adjustment units in FIG. 6 is only for illustration and not limitation.

It should also be understood that searching for the best advantages of each channel in the training phase can also be expanded to simultaneously search for secondary advantages other than the best advantage, and save two sets of configuration parameters. In the normal communication phase, the terminal equipment is based on its own capabilities and application scenarios. To determine the applicable set of parameters.

Generally, harmonic interference signals can be transmitted through normal communication links and printed circuit board (Printed Circuit Board, PCB) radiation transmission. If multiple adjustment units are used, the system can accept higher working bandwidth, provide better elimination effect and higher system stability. How can the multi-feedback architecture improve the system convergence speed from the hardware and save system time and resources?

It should be understood that the first connection in the embodiment of the present application may be LTE, and the second connection may be NR, which is not limited herein, as long as it can cause harmonic interference, it is within the protection scope of this document.

FIG. 8 shows a schematic block diagram of a method 200 for controlling harmonic interference according to an embodiment of the present application. As shown in FIG. 8, the method 200 includes some or all of the following contents:

S210: Collect, from the first uplink signal belonging to the first connection of the dual connection transmitted by the transmitter, a first harmonic interference signal that causes harmonic interference to the downlink signal belonging to the second connection of the dual connection.

S220: Adjust the first harmonic interference signal to a target amplitude and target phase.

S230. Superimpose the adjusted first harmonic interference signal with the received signal received by the receiver to control the second harmonic interference signal generated by the transmission of the first uplink signal in the received signal , The received signal includes the downlink signal and the second harmonic interference signal.

Optionally, in the embodiment of the present application, the method further includes: training to obtain the target amplitude and the target phase according to the third harmonic interference signal collected by the second uplink signal belonging to the first connection .

Optionally, in the embodiment of the present application, the method further includes: training to obtain the target amplitude and target phase based on the third harmonic interference signal collected from the second uplink signal belonging to the first connection, including : Collect the third harmonic interference signal that causes harmonic interference to the downlink signal belonging to the second connection from the second uplink signal transmitted by the transmitter; adjust the third harmonic interference signal Amplitude and phase; in the case that the receiver does not receive a downlink signal, the adjusted third harmonic interference signal is combined with the fourth harmonic interference signal received by the receiver and generated by the transmission of the second uplink signal Harmonic interference signal superimposition; detecting the power value of the signal to be detected superimposed by the adjusted third harmonic interference signal and the fourth harmonic interference signal; according to the power value of the signal to be detected, Training to obtain the target amplitude and the target phase.

Optionally, in the embodiment of the present application, the adjusting the amplitude and phase of the third harmonic interference signal includes: dividing the third harmonic interference signal into multiple fifth harmonic interference signals Signal; sequentially adjust the amplitude and phase of the multiple fifth harmonic interference signals.

Optionally, in the embodiment of the present application, the sequential adjustment of the amplitude and phase of the plurality of fifth harmonic interference signals includes: the adjusted first among the plurality of fifth harmonic interference signals Under the condition that the fifth-harmonic interference signal remains at the corresponding target amplitude and the target phase, adjust at least one of the fifth harmonic interference signals that are not adjusted among the plurality of fifth-harmonic interference signals. Harmonic interference signal amplitude and phase.

Optionally, in the embodiment of the present application, the third harmonic interference signal is transmitted through the communication link and radiated through the printed circuit board PCB.

Optionally, in the embodiment of the present application, the power value of the first harmonic interference signal is equal to the average value of the sum of the power values of the plurality of third harmonic interference signals, and the plurality of third harmonic interference signals The power values of any two third harmonic interference signals in the harmonic interference signal are different.

Optionally, in this embodiment of the present application, the operating frequency of the second uplink signal is the same as the operating frequency of the first uplink signal.

Optionally, in the embodiment of the present application, the first connection is Long Term Evolution LTE, and the second connection is New Radio NR.

Optionally, in the embodiment of the present application, in the first uplink signal belonging to the first connection of the dual connection transmitted from the transmitter, the collection of the first uplink signal belonging to the second connection of the dual connection causes The first harmonic interference signal of harmonic interference includes: coupling a signal with nonlinear characteristics from the first uplink signal that has passed through a power amplifier; and obtaining the signal with nonlinear characteristics after filtering. The first harmonic interference signal.

It should be understood that the various steps described in the method 200 can be implemented by various functional modules included in the apparatus 100, which are not repeated here for brevity.

It should be understood that, in the various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, rather than corresponding to the embodiments of the present application. The implementation process constitutes any limitation.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the above-described system, device, and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

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

If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory,) ROM, random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. Should be covered within the scope of protection of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims

A method for controlling harmonic interference, characterized in that the method is applied to a dual-connected communication system, and includes:

Collecting, from the first uplink signal belonging to the first connection of the dual connection from the transmitter, a first harmonic interference signal that causes harmonic interference to the downlink signal belonging to the second connection of the dual connection;

Adjusting the first harmonic interference signal to a target amplitude and a target phase;

The adjusted first harmonic interference signal is superimposed with the received signal received by the receiver to control the second harmonic interference signal generated by the transmission of the first uplink signal in the received signal, so The received signal includes the downlink signal and the second harmonic interference signal.
The method of claim 1, wherein the method further comprises:

According to the third harmonic interference signal collected from the second uplink signal belonging to the first connection, the target amplitude and the target phase are obtained through training.
The method according to claim 2, wherein the training to obtain the target amplitude and target phase according to the third harmonic interference signal collected from the second uplink signal belonging to the first connection comprises:

Collecting, from the second uplink signal transmitted by the transmitter, the third harmonic interference signal that causes harmonic interference to the downlink signal belonging to the second connection;

Adjusting the amplitude and phase of the third harmonic interference signal;

In the case that the receiver does not receive the downlink signal, the adjusted third harmonic interference signal is combined with the fourth harmonic interference signal received by the receiver and generated by the transmission of the second uplink signal Overlay

Detecting the power value of the signal to be detected after the adjusted third harmonic interference signal and the fourth harmonic interference signal are superimposed;

According to the power value of the signal to be detected, the target amplitude and the target phase are obtained through training.
The method according to claim 3, wherein the adjusting the amplitude and phase of the third harmonic interference signal comprises:

Dividing the third harmonic interference signal into a plurality of fifth harmonic interference signals;

The amplitude and phase of the plurality of fifth harmonic interference signals are sequentially adjusted.
The method according to claim 4, wherein the sequentially adjusting the amplitude and phase of the plurality of fifth harmonic interference signals comprises:

In the case that the adjusted fifth harmonic interference signal among the plurality of fifth harmonic interference signals remains at the corresponding target amplitude and the target phase, adjust the plurality of fifth harmonic interference signals The amplitude and phase of at least one fifth harmonic interference signal in the unadjusted fifth harmonic interference signal in the signal.
The method according to claim 4 or 5, wherein the third harmonic interference signal is transmitted through a communication link and radiated through a printed circuit board (PCB).
The method according to any one of claims 2 to 6, wherein the power value of the first harmonic interference signal is equal to the average value of the sum of the power values of a plurality of third harmonic interference signals, The power values of any two of the third harmonic interference signals in the plurality of third harmonic interference signals are different.
The method according to any one of claims 2 to 7, wherein the operating frequency of the second uplink signal is the same as the operating frequency of the first uplink signal.
The method according to any one of claims 1 to 8, wherein the first connection is Long Term Evolution LTE, and the second connection is New Radio NR.
The method according to any one of claims 1 to 9, wherein in the first uplink signal transmitted from the transmitter belonging to the first connection of the dual connection, a pair of The first harmonic interference signal caused by the harmonic interference caused by the downlink signal of the second connection includes:

Coupling out a signal with nonlinear characteristics from the first uplink signal passing through the power amplifier;

Obtain the first harmonic interference signal according to the filtered signal with nonlinear characteristics.
A device for controlling harmonic interference, characterized in that the device is applied to a dual-connected communication system, and includes:

The first signal acquisition module is configured to collect, from the first uplink signal belonging to the first connection of the dual connection transmitted by the transmitter, the first signal that causes harmonic interference to the downlink signal belonging to the second connection of the dual connection First harmonic interference signal;

A first signal adjustment module, configured to adjust the first harmonic interference signal to a target amplitude and target phase;

The first combiner is used to superimpose the adjusted first harmonic interference signal with the received signal received by the receiver to control the received signal generated by the transmission of the first uplink signal A second harmonic interference signal, and the received signal includes the downlink signal and the second harmonic interference signal.
The device according to claim 11, wherein the device further comprises:

The training module is configured to train to obtain the target amplitude and the target phase according to the third harmonic interference signal collected by the second uplink signal belonging to the first connection.
The device according to claim 12, wherein the training module comprises:

A second signal collection module, configured to collect, from the second uplink signal transmitted by the transmitter, the third harmonic interference signal that causes harmonic interference to the downlink signal belonging to the second connection;

The second signal adjustment module is used to adjust the amplitude and phase of the third harmonic interference signal;

The second combiner is used to combine the adjusted third harmonic interference signal with the transmission of the second uplink signal received by the receiver when the receiver does not receive the downlink signal. The generated fourth harmonic interference signal is superimposed;

A power detection module, configured to detect the power value of the signal to be detected after the adjusted third harmonic interference signal and the fourth harmonic interference signal are superimposed by the second combiner;

The feedback control module is configured to train to obtain the target amplitude and target phase according to the power value of the signal to be detected detected by the power detection module.
The device according to claim 13, wherein the second signal adjustment module comprises a power divider and a plurality of adjustment units, and the power divider is used to divide the third harmonic interference signal into a plurality of The fifth harmonic interference signal, the input end of each adjustment unit of the plurality of adjustment units is respectively connected to a fifth harmonic interference signal of the plurality of fifth harmonic interference signals, and each adjustment The unit is used to adjust the amplitude and phase of the input fifth harmonic interference signal.
The device according to claim 14, wherein each adjustment unit includes a first adjustment unit and a second adjustment unit, and the first adjustment unit and the second adjustment unit each include a radio frequency switch;

In the first stage, the radio frequency switch of the first adjustment unit is turned off, the radio frequency switch of the second adjustment unit is turned off, and the first adjustment unit is used to adjust the amplitude and phase of the input fifth harmonic interference signal ；

In the second stage, the radio frequency switch of the first adjustment unit is turned off, the radio frequency switch of the second adjustment unit is turned off, and the second adjustment unit is used when the first adjustment unit is switched off by the first adjustment unit. In the working state of the corresponding target amplitude and the target phase obtained in the stage, the amplitude and phase of the input fifth harmonic interference signal are adjusted.
The device according to claim 14 or 15, wherein the third harmonic interference signal is transmitted through a communication link and radiated through a printed circuit board (PCB).
The apparatus according to any one of claims 12 to 16, wherein the power value of the first harmonic interference signal is equal to the average value of the sum of the power values of a plurality of third harmonic interference signals, The power values of any two of the third harmonic interference signals in the plurality of third harmonic interference signals are different.
The apparatus according to any one of claims 12 to 17, wherein the operating frequency of the second uplink signal is the same as the operating frequency of the first uplink signal.
The apparatus according to any one of claims 11 to 18, wherein the first connection is Long Term Evolution LTE, and the second connection is New Radio NR.
The device according to any one of claims 11 to 19, wherein the first interference signal collection module comprises:

A coupler, which is used to couple a signal with nonlinear characteristics from the first uplink signal passing through the power amplifier;

The filter is used to filter the signal with nonlinear characteristics to obtain the first harmonic interference signal.
The device according to any one of claims 11 to 20, wherein the first signal adjustment module comprises:

An attenuator, configured to adjust the first harmonic interference signal to the target amplitude;

A phase shifter is used to adjust the first harmonic interference signal to the target phase.
The device according to any one of claims 11 to 21, wherein the device is a terminal device.