Method and device for improving standing wave and network equipment

Abstract

The embodiment of the invention is suitable for the technical field of communication, and provides a method and device for improving standing waves and network equipment. By applying the method, forward feedback equalization correction can be respectively carried out through two times of switching of the radio frequency switch, and standing-wave separation is realized; then, the standing wave generated in the signal transmission process can be improved through the equalizer coefficients generated through two times of calculation. By applying the method to improve the standing wave, the method does not depend on hardware debugging, only digital calculation is needed, the whole process is simple and fast, the adverse effect of the standing wave on the communication quality can be effectively reduced, and the overall air interface performance is improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of communication technology, and in particular to a method, apparatus, and network equipment for improving standing waves. Background Art

[0002] Standing waves are a common physical phenomenon. They form when two waves propagating in opposite directions with equal amplitude and frequency overlap. In wireless communications, the presence of standing waves can cause reflection, diffraction, and refraction during radio wave transmission, leading to energy loss and negatively impacting communication quality.

[0003] To reduce the impact of standing waves on communication quality, existing technologies typically rely on debugging the hardware in the device. For example, by adding an isolator after the power amplifier (PA) in the network device, the adverse effects of standing waves on communication can be alleviated. However, adding an isolator to the network device not only increases the cost of the device, but also makes debugging the hardware more difficult in actual applications. Summary of the Invention

[0004] The embodiments of the present application provide a method, apparatus, and network device for improving standing waves, which are used to solve the problem in the prior art of relying on hardware debugging to improve standing waves, which is prone to high equipment costs and great debugging difficulty.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides a method for improving standing waves, including: a network device controls a first path to be connected; when the first path is connected, the network device fits a first equalizer coefficient; when the second path is connected, the network device controls a second path to be connected, and the second path includes a filter; when the second path is connected, the network device fits a second equalizer coefficient; and the network device improves the standing waves generated during signal transmission based on the first equalizer coefficient and the second equalizer coefficient.

[0007] By applying the method for improving standing waves provided in the embodiments of the present application, it is possible to separate and correct standing waves generated during the communication process by switching different paths and applying an algorithm. By performing forward feedback equalization correction during the two path switching processes, the standing waves can be separated. The equalizer coefficients generated by the two calculations can then effectively improve the performance of digital pre-distortion correction. The entire process requires only digital calculations, does not rely on hardware debugging, and does not increase digital pre-distortion resources, which helps to improve overall air interface performance.

[0008] In a possible implementation of the first aspect, the network device controlling the connection of the first path may include: the network device controlling the first RF switch to directly connect to the second RF switch. The first RF switch is further connected to a coupler disposed between the first RF switch and the power amplifier, and the second RF switch is further connected to the antenna.

[0009] In a possible implementation of the first aspect, the network device controlling the connection of the second path may include: the network device controlling disconnection of a direct connection between the first RF switch and the second RF switch; and the network device controlling the first RF switch to connect to one end of the filter and controlling the second RF switch to connect to the other end of the filter. When both the first RF switch and the second RF switch are connected to the filter, the first RF switch is also connected to the coupler, and the second RF switch is also connected to the antenna.

[0010] In a possible implementation of the first aspect, when the first path is connected, the network device fitting the first equalizer coefficient may include: the network device generating a reference signal in the digital domain; when the first path is connected, the network device performing digital predistortion processing on the reference signal to obtain a first feedback signal; and the network device fitting the first equalizer coefficient based on the reference signal and the first feedback signal.

[0011] In another possible implementation of the first aspect, when the first path is connected, the network device performs digital predistortion processing on a reference signal to obtain a first feedback signal, including: when the first path is connected, the network device sends the reference signal to a predistortion element, the predistortion element is connected to one end of a power amplifier, the reference signal is processed by the power amplifier, and then fed back to the predistortion element via a coupler; and the network device determines the first feedback signal received by the predistortion element.

[0012] In a possible implementation of the first aspect, when the second path is connected, the network device fitting the second equalizer coefficient may include: when the second path is connected, the network device performing digital predistortion processing on a reference signal to obtain a second feedback signal; and the network device fitting the second equalizer coefficient based on the reference signal and the second feedback signal.

[0013] In another possible implementation of the first aspect, when the second path is connected, the network device performs digital predistortion processing on the reference signal to obtain the second feedback signal, including: when the second path is connected, the network device sends the reference signal to the predistortion element; and the network device determines the second feedback signal received by the predistortion element.

[0014] In a possible implementation of the first aspect, the network device improving the standing wave generated during signal transmission based on the first equalizer coefficient and the second equalizer coefficient may include: the network device generating a transfer function based on the first equalizer coefficient and the second equalizer coefficient, where the transfer function is used to characterize the propagation characteristics of the standing wave generated during signal transmission; and the network device improving the standing wave based on the transfer function.

[0015] In a second aspect, an embodiment of the present application provides a device for improving standing waves, comprising: a first path control module, a first equalizer coefficient fitting module, a second path control module, a second equalizer coefficient fitting module, and a standing wave improvement module, wherein:

[0016] A first passage control module, used for controlling the connection of the first passage;

[0017] A first equalizer coefficient fitting module, configured to obtain a first equalizer coefficient by fitting when the first path is connected;

[0018] A second path control module, used for controlling the connection of the second path, wherein the second path includes a filter;

[0019] A second equalizer coefficient fitting module, configured to obtain a second equalizer coefficient by fitting when the second path is connected;

[0020] The standing wave improvement module is used to improve the standing wave generated during signal transmission based on the first equalizer coefficient and the second equalizer coefficient.

[0021] In a third aspect, an embodiment of the present application provides a communication device, comprising a transceiver unit and a processing unit. The transceiver unit is configured to implement corresponding communication functions, and the processing unit is configured to perform processing operations. Optionally, the communication device further comprises a storage unit, which can be configured to store instructions and / or data, and the processing unit can read the instructions and / or data in the storage unit, so that the communication device implements the various actions described in the first aspect.

[0022] In a fourth aspect, an embodiment of the present application provides a network device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the method for improving standing waves as described in any one of the first aspects above can be implemented.

[0023] In the fifth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores computer instructions. When the computer instructions are executed on a network device, the network device executes the above-mentioned related method steps to implement the method for improving standing waves as described in any one of the above-mentioned first aspects.

[0024] In a sixth aspect, an embodiment of the present application provides a chip comprising a memory and a processor, wherein the processor executes a computer program stored in the memory, and can implement the method for improving standing waves as described in any one of the first aspects above. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the internal structure of a network device provided in an embodiment of the present application;

[0026] Figure 2 is a schematic diagram of a signal transmission path provided in an embodiment of the present application;

[0027] Figure 3 This is a schematic diagram of a communication scenario provided by an embodiment of the present application;

[0028] Figure 4 This is a schematic diagram of a standing wave improvement result provided by an embodiment of the present application;

[0029] Figure 5 Schematic diagram of a method for improving standing waves provided in an embodiment of the present application;

[0030] Figure 6 This is a structural block diagram of a device for improving standing waves provided in an embodiment of the present application;

[0031] Figure 7 is a schematic diagram of a communication device provided in an embodiment of the present application;

[0032] Figure 8 This is a schematic diagram of a network device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0033] To facilitate the clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, terms such as "first" and "second" are used to distinguish between identical or similar items with substantially the same functions and effects. For example, terms such as "first path" and "second path" are merely used to distinguish between different paths and do not constitute any other limitation.

[0034] It should be noted that in the embodiments of this application, words such as "exemplarily" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplarily" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplarily" or "for example" is intended to present the relevant concepts in a concrete manner.

[0035] The business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Ordinary technicians in this field will know that with the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0036] In the embodiments of the present application, "at least one" refers to one or more, and "more" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0037] The steps involved in the method for improving standing waves provided in the embodiment of the present application are merely examples. Not all steps must be performed, or not all contents or technical features in each step are mandatory. They can be increased or decreased as needed during use.

[0038] The same step or steps with the same function or technical features in the embodiments of the present application can be referenced and learned from each other in different embodiments.

[0039] As described in the background technology, standing waves may be generated during the communication process, and the appearance of standing waves will affect the communication quality. In particular, in the wireless local area network (WLAN) multilink dual 5G (fifth generation mobile communication technology) scenario, the impact of standing waves on communication quality is particularly obvious. In the dual 5G scenario, the network device can simultaneously transmit signals in two frequency bands, one of which is a high-frequency signal and the other is a low-frequency signal. For example, in the dual 5G scenario, the network device can simultaneously transmit signals in the 2.4 GHz and 5.0 GHz frequency bands. The signals in the two frequency bands affect each other, thereby generating standing waves and affecting the communication quality.

[0040] Signals transmitted by network equipment must be processed by a power amplifier. If the signal enters the duplexer directly after processing by the power amplifier, standing waves will be exacerbated. This exacerbated standing wave may cause the power amplifier to generate large nonlinear components, exceeding the processing capabilities of the digital pre-distortion (DPD) element, leading to degraded transmission performance. One method to improve standing waves is to add an isolator after the power amplifier of the network equipment. By debugging hardware units such as the isolator, when the network equipment transmits, the signal enters the isolator after processing by the power amplifier, and then enters the duplexer through the isolator. This can reduce the impact of some standing waves. However, adding an isolator to the network equipment increases equipment costs. In the WLAN Multilink dual-5G scenario, to reduce the cost of the entire network equipment, adding a hardware unit directly to the equipment undoubtedly increases the cost burden on equipment manufacturers. Furthermore, after adding a hardware unit to the equipment, it needs to be debugged. This type of debugging is generally difficult. Moreover, the effectiveness of the debugged hardware unit in improving standing waves depends on the actual status of each hardware unit or component in the equipment. It can be seen that the practice of adding hardware units such as isolators to network equipment in the hope of improving standing waves not only increases the cost of the equipment, but is also prone to failure to achieve the expected improvement effect on standing waves in actual applications due to difficulty in debugging or poor actual condition of the hardware units.

[0041] In response to the above problems, an embodiment of the present application provides a method for improving standing waves. By switching the RF switch and applying an algorithm, the standing waves generated by the duplexer can be separated and corrected, reducing the impact of the standing waves on the performance of the digital predistortion element, thereby improving the performance of the downlink air interface in the dual 5G communication scenario.

[0042] The method for improving standing waves provided in the embodiment of the present application can be applied to a network device, which may be a base station in a global system for mobile communications (GSM) or code division multiple access (CDMA), a base station in a wideband code division multiple access (WCDMA) system or a time division code division multiple access (TD-SCDMA) system, or an evolved base station (eNB or eNodeB) in a long term evolution (LTE) system. The network device may also be a wireless controller in a cloud wireless access network scenario, or the network device may also be a relay station, an access point, a vehicle-mounted device, a wearable device, a network device in a 5G network, and a network device in a future evolved public land mobile network (PLMN). The embodiment of the present application is not limited to this.

[0043] like Figure 1 FIG. 1 is a schematic diagram of the internal structure of a network device provided in an embodiment of the present application. It should be understood that Figure 1 What is shown is only a partial structure of the network device involved in the method for improving standing waves in an embodiment of the present application.

[0044] See also Figure 1 The network device 10 includes a power amplifier 101 , a coupler (CP) 102 , a first radio frequency switch (SW) 103 , a second radio frequency switch 104 , a filter 105 , an antenna 106 and a pre-distortion element 107 .

[0045] The power amplifier 101 is referred to as the power amplifier. It is a device that performs power amplification. The power amplifier 101 is an important component of the network device 10 and is used to amplify the power of the signal and then radiate it into space through the antenna 106. Figure 1 One end of the power amplifier 101 is connected to the coupler 102 , and the signal input to the power amplifier 101 and processed will be transmitted to the coupler 102 .

[0046] Coupler 102 is a power distribution element. In a microwave system, it is usually necessary to divide the microwave power of one path into several paths in proportion. This is the power distribution problem. The element that realizes this function is called a power distribution element or coupler. Figure 1The coupler 102 can split the signal amplified by the power amplifier 101 into two paths, one of which is transmitted to the antenna 106 through the first RF switch 103, and the other is sent to the predistortion element 107 through the feedback channel for digital predistortion processing.

[0047] The first RF switch 103 and the second RF switch 104 can be the same type of RF switches or different types of RF switches. By turning on the first RF switch 103 and / or the second RF switch 104, different signal transmission paths can be formed in the network device 10. Figure 1 When the first RF switch 103 and the second RF switch 104 are directly connected, the first path in the network device 10 is connected. When the first path is connected, the signal output by the coupler 102 will pass through the first RF switch 103 and the second RF switch 104 and be transmitted to the antenna 106. When one end of the first RF switch 103 is connected to the filter 105 and one end of the second RF switch 104 is connected to the filter 105, the second path in the network device 10 is connected. When the second path is connected, the signal output by the coupler 102 will first pass through the first RF switch 103 and then be transmitted to the filter 105. The signal processed by the filter 105 is then transmitted to the antenna 106 by the second RF switch 104. During the signal transmission process, at most only one of the first and second paths is connected. For example, when the first path is connected, the second path is in a disconnected state; when the second path is connected, the first path is in a disconnected state. The difference between the signal being transmitted to the antenna 106 via the first path or the second path is that when the signal is transmitted via the first path, there are no other components on the first path after the coupler 102 to process the signal; when the signal is transmitted via the second path, there is a filter 105 between the first RF switch 103 and the second RF switch 104 for filtering the signal.

[0048] Filter 105 can be considered a filtering circuit composed of capacitors, inductors, and resistors. Filter 105 can effectively filter out frequencies at or outside a specific frequency in the power line, obtaining a power signal at a specific frequency, or eliminating a power signal at a specific frequency. In the embodiment of the present application, filter 105 can be a single-band simultaneous (SBS) filter.

[0049] Antenna 106 can be used to receive and / or transmit signals between network device 10 and a terminal device. Specifically, antenna 106 can receive signals transmitted by network device 10 and transmit the signals to the terminal device. Antenna 106 can also receive signals transmitted by the terminal device and transmit the signals to a processing unit in network device 10.

[0050] The pre-distortion element 107 is a module for performing digital pre-distortion processing. Digital pre-distortion is one of the most basic building blocks in current wireless communication systems. It can significantly improve the efficiency of the power amplifier by reducing the distortion generated when the power amplifier operates in its nonlinear region.

[0051] The method for improving standing waves provided in an embodiment of the present application can be implemented in a network device having the above-mentioned hardware structure. Specifically, the network device can first switch the signal transmission path to the main path by switching the RF switch, and the main path can be the first path in the aforementioned embodiment. When the first path is connected, the signal transmission state of the network device is maintained in a normal state (Normal state). At this time, the network device can fit the reference signal s and the feedback signal fb1 in the digital domain to the corresponding TX (transmit) link digital equalizer (TX equalizer, TXEQ) coefficients.

[0052] In the embodiment of the present application, the network device switches the signal transmission path to the first path by controlling Figure 1 The first RF switch 103 and the second RF switch 104 are implemented. For example, the network device can control the first RF switch 103 to be directly connected to the second RF switch 104. In this way, the first path is connected.

[0053] like Figure 2 FIG. 1 is a schematic diagram of a signal transmission path provided by an embodiment of the present application. Figure 2 (a) in FIG. 1 is a schematic diagram showing a case where the first passage is connected.

[0054] When the first path is connected, the output end of the power amplifier 101 is connected to the input port of the coupler 102. The output port of the coupler 102 includes two signal transmission interfaces, one of which is connected to the pre-distortion element 107, and the other is connected to one end of the first RF switch 103. The other end of the first RF switch 103 is directly connected to one end of the second RF switch 104 via a signal line, and the other end of the second RF switch 104 is connected to the antenna 106.

[0055] The network device can generate a reference signal s in the digital domain when the first path is connected. Figure 2The power amplifier 101 in (a) is processed and then divided into two signals by the coupler 102. On the one hand, one signal is transmitted to the antenna 106 after passing through the first RF switch 103 and the second RF switch 104. In the process of the signal passing through the first RF switch 103 and the second RF switch 104 in sequence, no other components perform other processing on the signal. On the other hand, the other signal is transmitted to the pre-distortion element 107 for processing to obtain the feedback signal fb1. The network device can fit the TXEQ equalizer coefficients based on the reference signal s and the feedback signal fb1. The network device can use the least squares method to fit the TXEQ equalizer coefficients based on the reference signal s and the feedback signal fb1.

[0056] After obtaining the TXEQ equalizer coefficients, the network device can switch the signal transmission path to the second path by switching the RF switch. When the second path is connected, the signal will be processed by the SBS filter before being transmitted to the antenna. Therefore, when the second path is connected, the signal transmission state of the network device can be considered to be maintained in the SBS state. At this time, the network device can fit the digital domain reference signal s and feedback signal fb2 to the corresponding FB (feedback) link digital equalizer (FBEQ) coefficients.

[0057] In the embodiment of the present application, the network device switches the signal transmission path to the second path by controlling Figure 1 or Figure 2 The first RF switch 103 and the second RF switch 104 are implemented. Figure 2 (b) in the figure shows a schematic diagram of the case where the second path is connected. Specifically, the network device can control the disconnection of the direct connection between the first RF switch 103 and the second RF switch 104. In this way, the first path is disconnected. Then, the network device can connect one end of the first RF switch 103 to the filter 105 and one end of the second RF switch 104 to the filter, forming a transmission path in which the signal is transmitted to the filter 105 after passing through the first RF switch 103, and then output by the filter 105 after passing through the second RF switch 104 to reach the antenna 106.

[0058] like Figure 2 As shown in (b), when the second path is connected, the output end of the power amplifier 101 is connected to the input port of the coupler 102, and the output port of the coupler 102 also includes two signal transmission interfaces, one of which is connected to the pre-distortion element 107, and the other is connected to one end of the first RF switch 103. The other end of the first RF switch 103 is connected to one end of the filter 105, and the other end of the filter 105 is connected to one end of the second RF switch 104. The other end of the second RF switch 104 is connected to the antenna 106.

[0059] The network device can generate a reference signal s in the digital domain when the second path is connected. When the first path or the second path is connected, the network device can generate a reference signal s in the digital domain in the same manner. That is, in the embodiment of the present application, when the first path or the second path is connected, the reference signal s can be the same signal. Figure 2 The power amplifier 101 in (b) is processed and then divided into two signals by the coupler 102. On the one hand, one signal is transmitted to the filter 105 after passing through the first RF switch 103, and is filtered by the filter 105. The processed signal is transmitted to the antenna 106 via the second RF switch 104. On the other hand, the other signal is transmitted to the pre-distortion element 107 for processing to obtain the feedback signal fb2. The network device can fit the FBEQ equalizer coefficients based on the reference signal s and the feedback signal fb2. Similar to the method used to fit TXEQ, the network device can also use the least squares method to fit the FBEQ equalizer coefficients based on the reference signal s and the feedback signal fb2. The above method of fitting the equalizer coefficients using the least squares method based on the reference signal and the feedback signal has been widely used in the prior art, and the embodiments of the present application will not be repeated here.

[0060] After obtaining the TXEQ equalizer coefficients and the FBEQ equalizer coefficients through fitting, the network device can apply the coefficients to improve the standing waves generated during the communication process.

[0061] In the embodiment of the present application, when the network device uses the above-mentioned TXEQ equalizer coefficients and FBEQ equalizer coefficients to improve standing waves, it can maintain the signal transmission path in a state where the second path is connected. That is, the signal transmitted by the network device can be transmitted to the antenna via the second path in the device for transmission. During this process, the network device can also use the fitted TXEQ equalizer coefficients and FBEQ equalizer coefficients to improve standing waves generated during signal transmission.

[0062] It has been verified in practice that, under large bandwidth conditions, the method for improving standing waves provided in the embodiments of the present application can effectively improve the transmission performance of network equipment by 2 to 3 dB.

[0063] like Figure 3 FIG. 1 is a schematic diagram of a communication scenario provided by an embodiment of the present application. Figure 3 In the communication scenario shown, the method provided in the embodiment of the present application can be applied to improve the influence of standing waves.

[0064] exist Figure 3The communication scenario shown includes a network device 31 and a terminal device 32, wherein the network device 31 can be a device adapted to WLAN Multilink dual 5G, that is, the network device can apply 5G communication technology and simultaneously transmit two frequency band signals to the terminal device 32. The signals of these two frequency bands may include a high frequency band signal and a low frequency band signal. For example, the high frequency band signal may be a 5.0GHz frequency band signal, and the low frequency band signal may be a 2.4GHz frequency band signal. The above-mentioned high frequency band signal and low frequency band signal may be transmitted by different signal transmitters respectively. Combined Figure 3 , the network device 31 includes a first transmitter 3101 and a second transmitter 3102, wherein the first transmitter 3101 can be used to transmit a low-frequency band signal, that is, a signal in the 2.4GHz band, and the second transmitter 3102 is used to transmit a high-frequency band signal, that is, a signal in the 5.0GHz band. The communication between the network device 31 and the terminal device 32 also includes the terminal device 32 transmitting a signal to the network device 31. Therefore, in Figure 3 In the embodiment, the network device 31 further includes a signal receiver, namely Figure 3 The first receiver 3103 and the second receiver 3104 are shown in FIG. Figure 3 Also shown is a first filter 311 in the communication path formed by the first transmitter 3101, the first receiver 3103 and the terminal device 32, and a second filter 312 in the communication path formed by the second transmitter 3102, the second receiver 3104 and the terminal device 32. The above-mentioned first filter 311 and second filter 312 can be the SBS filters in the aforementioned embodiments.

[0065] like Figure 3 As shown, in the dual 5G communication scenario, the network device 31 can simultaneously use two frequency bands to transmit signals to the terminal device 32. Standing waves will be generated during the transmission of signals in the two frequency bands, affecting the communication quality. Therefore, the network device can use the method for improving standing waves provided in the embodiment of the present application to configure the signal transmission process in different paths by switching the RF switch, and respectively fit the TXEQ equalizer coefficients and FBEQ equalizer coefficients, and then apply the above-mentioned TXEQ equalizer coefficients and FBEQ equalizer coefficients to improve the standing waves.

[0066] like Figure 4 The figure is a schematic diagram of the improvement result of standing wave provided by the embodiment of the present application. Figure 4 , a comparison diagram of the air interface performance after the SBS filter is turned on and the method provided in the embodiment of the present application is applied to improve the standing wave and after the method provided in the embodiment of the present application is not used to improve the standing wave is shown.

[0067] Specifically, refer to Figure 4, the horizontal axis is the air interface power value TPC, and the vertical axis is the air interface performance EVM, Figure 4 The three curves L401, L402 and L403 shown in the figure respectively represent the changes in the air interface performance EVM under different conditions. Among them, the first curve L401 represents the air interface performance EVM result with the SBS filter bypassed. The second curve L402 represents the air interface performance EVM result after the SBS filter is turned on. The second curve L402 can be regarded as the air interface performance EVM result obtained when the SBS filter is turned on to filter the signal but the method provided in the embodiment of the present application is not applied to improve the standing wave. Figure 4 As can be seen in the figure, after the SBS filter is turned on, the air interface performance EVM deteriorates sharply, and the deterioration of EVM performance increases with changes in power. As a comparison with the second curve L402, the third curve L403 shows the air interface performance EVM results obtained when the SBS filter is turned on to filter the signal and the method provided in the embodiment of the present application is applied to improve standing wave. A comparison of the second curve L402 and the third curve L403 shows that applying the method provided in the embodiment of the present application to improve standing wave can effectively improve air interface performance by 2 to 3 dB.

[0068] In conjunction with the description of the above embodiments, refer to Figure 5 , which shows a schematic diagram of a method for improving standing waves provided by an embodiment of the present application, and the method may specifically include the following steps:

[0069] S501: The network device controls the connection of the first path.

[0070] The embodiment of the present application can be applied to a network device, that is, the execution subject of the method can be a network device, which can be a network device having the aforementioned Figure 1 or Figure 2 The network device with the structure shown in the figure can form two different signal transmission paths inside the device by switching the radio frequency switch, namely the first path and the second path in the above-mentioned embodiment.

[0071] The method for improving standing waves provided in the embodiments of this application can be applied to the process of network devices transmitting signals in a WLAN Multilink dual-5G scenario. In this scenario, the signal transmission process will generate standing waves within the network device, affecting communication quality. Of course, this method can also be applied to other similar communication scenarios where standing waves are generated due to signal transmission, and the embodiments of this application are not limited to this.

[0072] When applying the method provided in the embodiment of the present application to improve standing waves, the network device can first control the connection of the first path. That is, the network device switches the radio frequency switch to maintain the signal transmission path in the state of the first path being connected.

[0073] In the specific implementation, refer to Figure 2 As shown in (a), the network device can control Figure 2 In (a), the first RF switch 103 is directly connected to the second RF switch 104. Thus, the first path in the network device is connected. When the first path is connected, the first RF switch 103 is also connected to the coupler 102, which is disposed between the first RF switch 103 and the power amplifier 101. The second RF switch 104 is also connected to the antenna 106.

[0074] S502: When the first path is connected, the network device obtains a first equalizer coefficient by fitting.

[0075] In an embodiment of the present application, the first equalizer coefficients may be the TXEQ equalizer coefficients described in the aforementioned embodiments. The first equalizer coefficients may be obtained by fitting when the first path is connected. Specifically, the first equalizer coefficients may be obtained by fitting a reference signal in the digital domain and a first feedback signal fed back by the predistortion element. The reference signal in the digital domain may be the reference signal s described in the aforementioned embodiments, and the first feedback signal may be the feedback signal fb1 described in the aforementioned embodiments.

[0076] In a specific implementation, the network device can first generate a reference signal in the digital domain. Then, with the first path connected, digital predistortion processing can be performed on the reference signal to obtain a first feedback signal. In this way, the network device can fit the first equalizer coefficients based on the reference signal and the first feedback signal. In other words, the network device can fit the TXEQ equalizer coefficients based on the reference signal s and the first feedback signal fb1.

[0077] The network device may use the least square method to fit the first equalizer coefficient according to the reference signal and the first feedback signal.

[0078] In a possible implementation of the embodiment of the present application, when the first path is connected, the network device performs digital predistortion processing on the reference signal to obtain the first feedback signal. This can be achieved by sending the reference signal to the predistortion element when the first path is connected. Then, the network device can determine the first feedback signal received by the predistortion element.

[0079] refer to Figure 2 As shown in (a) in FIG. 1 , the predistortion element 107 is connected to one end of the power amplifier 101 . After the reference signal is processed by the power amplifier 101 , it is fed back to the predistortion element 107 via the coupler 102 .

[0080] S503: The network device controls the second path to be connected, and the second path includes a filter.

[0081] In the embodiment of the present application, the filter on the second path may be an SBS filter. Figure 2 As shown in (b), the SBS filter can be set between the first RF switch 103 and the second RF switch 104. When the second path is connected, the signal will be transmitted to the SBS filter (i.e. Figure 2 The signal is then transmitted to the antenna 106 through the second RF switch 104 .

[0082] When the network device controls the connection of the second path, it needs to disconnect the first path first. Figure 2 The direct connection between the first RF switch 103 and the second RF switch 104 in (a) is shown in FIG. Then, the network device can connect the first RF switch 103 to one end of the filter 105 and control the second RF switch 104 to connect to the other end of the filter 105. In this way, the network device forms a Figure 2 The state in which the second path shown in (b) is connected. After the second path is connected, as shown in FIG. Figure 2 As shown in (b) of FIG. 1 , both the first RF switch 103 and the second RF switch 104 are connected to the filter 105 . At this time, the first RF switch 103 is also connected to the coupler 102 , and the second RF switch 104 is also connected to the antenna 106 .

[0083] S504: When the second path is connected, the network device obtains a second equalizer coefficient by fitting.

[0084] In the embodiment of the present application, the second equalizer coefficients may be the FBEQ equalizer coefficients described in the aforementioned embodiments. The second equalizer coefficients may be obtained by fitting with the second path connected. Specifically, the second equalizer coefficients may be obtained by fitting a reference signal in the digital domain and a second feedback signal fed back by the predistortion element. The reference signal in the digital domain may be the reference signal s described in the aforementioned embodiments, and the second feedback signal may be the feedback signal fb2 described in the aforementioned embodiments.

[0085] In a specific implementation, the network device can first generate a reference signal in the digital domain. Then, with the second path connected, digital predistortion processing can be performed on the reference signal to obtain a second feedback signal. In this way, the network device can fit the second equalizer coefficients based on the reference signal and the second feedback signal. In other words, the network device can fit the TXEQ equalizer coefficients based on the reference signal s and the second feedback signal fb2.

[0086] Similar to the method of fitting the first equalizer coefficients, the network device may also use the least squares method to fit the second equalizer coefficients according to the reference signal and the second feedback signal.

[0087] In a possible implementation of the embodiment of the present application, when the second path is connected, the network device performs digital predistortion processing on the reference signal to obtain the second feedback signal. This may be that when the second path is connected, the reference signal is sent to the predistortion element, and then the network device may determine the second feedback signal received by the predistortion element.

[0088] refer to Figure 2 As shown in (b) in FIG. 1 , the predistortion element 107 is connected to one end of the power amplifier 101 . After being processed by the power amplifier 101 , the reference signal is fed back to the predistortion element 107 via the coupler 102 .

[0089] S505: The network device improves standing waves generated during signal transmission based on the first equalizer coefficient and the second equalizer coefficient.

[0090] After obtaining the first equalizer coefficient and the second equalizer coefficient through fitting, the network device can improve the standing wave generated during signal transmission based on the two equalizer coefficients.

[0091] In the embodiment of the present application, the process of improving the standing wave by the network device using the present method can be realized when the second path inside the network device is connected. Figure 2 When the second path shown in (b) is connected, the network device can transmit a signal to the antenna via the second path, and the signal can be transmitted by the antenna to the terminal device. At the same time, the network device can apply the fitted first and second equalizer coefficients to improve standing waves generated during signal transmission, thereby reducing the impact of standing waves on communication quality.

[0092] In one possible implementation of the embodiments of the present application, when a network device improves standing waves generated during signal transmission based on the first and second equalizer coefficients, a transfer function may be generated based on the first and second equalizer coefficients. This transfer function may characterize the propagation characteristics of the standing waves generated during signal transmission. Thus, because the propagation characteristics of the standing waves can be understood based on the transfer function, the network device may improve the standing waves based on the transfer function.

[0093] By switching the radio frequency switch, the embodiment of the present application can form different signal transmission paths inside the network device. Then, different signal transmission paths can be used to adopt a forward feedback equalization algorithm to separate and correct the standing waves generated during the signal transmission process, thereby reducing the impact of the standing wave components on the digital pre-distortion performance. By applying the method for improving standing waves provided by the embodiment of the present application, there is no need to add other hardware units inside the network device, nor is there any need to debug each hardware unit. Standing waves can be improved simply and quickly, thereby improving the performance of the downlink air interface of the network device and improving the communication quality.

[0094] In the embodiments of the present application, the terminal network device can be divided into functional modules according to the above-mentioned method examples. For example, each functional module can be divided according to each function, or one or more functions can be integrated into a functional module. The above-mentioned integrated modules can be implemented in the form of software functional modules. It should be understood that the division of modules in the embodiments of the present application is schematic and is only a logical functional division. In actual implementation, other division methods can be used. The following is an example of dividing each functional module according to each function.

[0095] Corresponding to the above embodiments, refer to Figure 6 , shows a structural block diagram of a device for improving standing waves provided in an embodiment of the present application. The device can be applied to the network devices in the aforementioned embodiments. The device can specifically include the following modules: a first path control module 601, a first equalizer coefficient fitting module 602, a second path control module 603, a second equalizer coefficient fitting module 604, and a standing wave improvement module 605, wherein:

[0096] A first path control module 601 is used to control the connection of the first path;

[0097] A first equalizer coefficient fitting module 602 is configured to obtain first equalizer coefficients by fitting when the first path is connected;

[0098] A second path control module 603, configured to control the connection of a second path, wherein the second path includes a filter;

[0099] A second equalizer coefficient fitting module 604 is configured to obtain second equalizer coefficients by fitting when the second path is connected;

[0100] The standing wave improvement module 605 is configured to improve the standing wave generated during signal transmission based on the first equalizer coefficient and the second equalizer coefficient.

[0101] In the embodiment of the present application, the first path control module 601 may be specifically used to:

[0102] The first RF switch is controlled to be directly connected to the second RF switch, the first RF switch is further connected to a coupler, the coupler is provided between the first RF switch and the power amplifier, and the second RF switch is further connected to an antenna.

[0103] In the embodiment of the present application, the second path control module 603 may be specifically used to:

[0104] Controlling to disconnect the direct connection between the first radio frequency switch and the second radio frequency switch;

[0105] The first RF switch is controlled to be connected to one end of the filter, and the second RF switch is controlled to be connected to the other end of the filter. When both the first RF switch and the second RF switch are connected to the filter, the first RF switch is also connected to the coupler, and the second RF switch is also connected to the antenna.

[0106] In the embodiment of the present application, the first equalizer coefficient fitting module 602 may be specifically configured to:

[0107] Generate a reference signal in the digital domain;

[0108] When the first path is connected, performing digital predistortion processing on the reference signal to obtain a first feedback signal;

[0109] The first equalizer coefficients are obtained by fitting according to the reference signal and the first feedback signal.

[0110] In a possible implementation of the embodiment of the present application, the first equalizer coefficient fitting module 602 may also be used to:

[0111] When the first path is connected, the reference signal is sent to a predistortion element, the predistortion element is connected to one end of a power amplifier, and the reference signal is processed by the power amplifier and then fed back to the predistortion element via a coupler;

[0112] The first feedback signal received by the predistortion element is determined.

[0113] In the embodiment of the present application, the second equalizer coefficient fitting module 604 may be specifically configured to:

[0114] When the second path is connected, performing digital predistortion processing on the reference signal to obtain a second feedback signal;

[0115] The second equalizer coefficients are obtained by fitting according to the reference signal and the second feedback signal.

[0116] In a possible implementation of the embodiment of the present application, the second equalizer coefficient fitting module 604 may also be used to:

[0117] When the second path is connected, sending the reference signal to the predistortion element;

[0118] The second feedback signal received by the predistortion element is determined.

[0119] In the embodiment of the present application, the standing wave improvement module 605 can be specifically used to:

[0120] generating a transfer function according to the first equalizer coefficient and the second equalizer coefficient, wherein the transfer function is used to characterize propagation characteristics of a standing wave generated during signal transmission;

[0121] The standing wave is improved according to the transfer function.

[0122] By using the device for improving standing waves provided in the embodiments of the present application, the functions described in the various steps of the method for improving standing waves in the aforementioned method embodiments can also be realized.

[0123] like Figure 7 , which is a schematic diagram of a communication device provided in an embodiment of the present application. Figure 7 The communication device in the embodiment includes a transceiver unit 701 and a processing unit 702. The transceiver unit 701 can be used to implement corresponding communication functions, and the processing unit 702 can be used to perform processing operations.

[0124] Optionally, the communication device further includes a storage unit, which can be used to store instructions and / or data. The processing unit 702 can read the instructions and / or data in the storage unit so that the communication device implements the actions in the aforementioned method embodiments.

[0125] The embodiment of the present application also provides a network device, such as Figure 8 8 is a schematic diagram of a network device provided in an embodiment of the present application. The network device includes a processor 801 and a communication interface 802. The processor 801 is configured to execute computer programs or instructions stored in a memory 803, or read data stored in the memory 803, to perform the methods in the aforementioned various method embodiments.

[0126] Optionally, the processor 801 is one or more processors, and the communication interface 802 is used to receive and / or send signals. Exemplarily, the processor 801 can be used to control the communication interface 802 to receive and / or send signals.

[0127] Alternatively, as Figure 8As shown, the network device further includes a memory 803. The memory 803 is used to store computer programs or instructions and / or data. The memory 803 can be integrated with the processor 801, or can also be separately provided. Optionally, the memory 803 can be one or more memories.

[0128] Optionally, the processor 801, the communication interface 802, and the memory 803 may be interconnected via a bus 804. The bus 804 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus. The bus 804 may be divided into an address bus, a data bus, and a control bus. For convenience, Figure 8 Although only one line is used in the diagram, this does not mean that there is only one bus or only one type of bus in the network device.

[0129] As an example of an embodiment of the present application, the above-mentioned network device can be used to implement the operations performed by the network device in the aforementioned various method embodiments. Exemplarily, the processor 801 is used to execute the computer program or instructions stored in the memory 803 to implement the relevant operations of the network device in the aforementioned various method embodiments.

[0130] The present application also provides a chip, which can be a general-purpose processor or a dedicated processor. The chip includes a processor. The processor is used to support a network device in executing the above-mentioned related steps to implement the method for improving standing waves in each of the above-mentioned embodiments.

[0131] Optionally, the chip may further include a transceiver, which is configured to be controlled by the processor and to support the network device in executing the above-mentioned related steps to implement the method for improving standing waves in the above-mentioned embodiments.

[0132] Optionally, the chip may further include a storage medium.

[0133] Optionally, the chip can be implemented using the following circuits or devices: one or more field programmable gate arrays (FPGAs), programmable logic devices (PLDs), controllers, state machines, gate logic, discrete hardware components, any other suitable circuits, or any combination of circuits capable of performing the various functions described throughout this application.

[0134] It should be understood that the processor mentioned in the embodiments of the present application (such as processor 801) can be a central processing unit (CPU), or it can be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0135] It should also be understood that the memory (such as memory 803) mentioned in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile memory and non-volatile memory. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. Among them, the volatile memory can be a random access memory (RAM), which can be used as an external cache.

[0136] Finally, it should be noted that the above is only a specific implementation method of the present application, but the protection scope of the present application is not limited to this. Any changes or replacements within the technical scope disclosed in the present application should be covered by the protection scope of the present application.

Claims

1. A method for improving standing waves, characterized in that: Applied to a network device, the method comprises: The network device controls the connection of the first path; The network device obtains a first equalizer coefficient by fitting when the first path is connected; The network device controls the connection of a second path, and the second path includes a filter; The network device obtains a second equalizer coefficient by fitting when the second path is connected; The network device improves standing waves generated during signal transmission based on the first equalizer coefficient and the second equalizer coefficient.

2. The method according to claim 1, characterized in that The network device controls the connection of the first path, including: The network device controls the first RF switch to be directly connected to the second RF switch, the first RF switch is also connected to a coupler, the coupler is arranged between the first RF switch and the power amplifier, and the second RF switch is also connected to an antenna.

3. The method according to claim 2, characterized in that The network device controls the connection of the second path, including: The network device controls to disconnect the direct connection between the first radio frequency switch and the second radio frequency switch; The network device controls the first RF switch to be connected to one end of the filter, and controls the second RF switch to be connected to the other end of the filter. When both the first RF switch and the second RF switch are connected to the filter, the first RF switch is also connected to the coupler, and the second RF switch is also connected to the antenna.

4. The method according to any one of claims 1 to 3, characterized in that: When the first path is connected, the network device obtains a first equalizer coefficient by fitting, including: The network device generates a reference signal in the digital domain; When the first path is connected, the network device performs digital predistortion processing on the reference signal to obtain a first feedback signal; The network device obtains the first equalizer coefficient by fitting according to the reference signal and the first feedback signal.

5. The method according to claim 4, characterized in that When the first path is connected, the network device performs digital predistortion processing on the reference signal to obtain a first feedback signal, including: When the first path is connected, the network device sends the reference signal to the pre-distortion element, the pre-distortion element is connected to one end of the power amplifier, and the reference signal is processed by the power amplifier and then fed back to the pre-distortion element via a coupler; The network device determines the first feedback signal received by the pre-distortion element.

6. The method according to claim 4 or 5, characterized in that: When the second path is connected, the network device obtains a second equalizer coefficient by fitting, including: When the second path is connected, the network device performs digital predistortion processing on the reference signal to obtain a second feedback signal; The network device obtains the second equalizer coefficient by fitting according to the reference signal and the second feedback signal.

7. The method according to claim 6, characterized in that When the second path is connected, the network device performs digital predistortion processing on the reference signal to obtain a second feedback signal, including: The network device sends the reference signal to the pre-distortion element when the second path is connected; The network device determines the second feedback signal received by the pre-distortion element.

8. The method according to any one of claims 1 to 7, characterized in that: The network device improves the standing wave generated during signal transmission based on the first equalizer coefficient and the second equalizer coefficient, including: The network device generates a transfer function according to the first equalizer coefficient and the second equalizer coefficient, wherein the transfer function is used to characterize the propagation characteristics of the standing wave generated during the signal transmission process; The network device improves the standing wave according to the transfer function.

9. A network device, characterized in that: The network device comprises a first path and a second path, the second path comprises a filter, and the network device is used for: controlling the first path to be connected, and obtaining a first equalizer coefficient by fitting when the first path is connected; controlling the second path to be connected, and obtaining a second equalizer coefficient by fitting when the second path is connected; Based on the first equalizer coefficient and the second equalizer coefficient, the standing wave generated during signal transmission is improved.

10. A network device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the method for improving standing waves as described in any one of claims 1 to 8 is implemented.

11. A chip comprising a memory and a processor, characterized in that: The processor executes the computer program stored in the memory to implement the method for improving standing waves according to any one of claims 1 to 8.

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