Radio-frequency processing device and detection method therefor, and communication system

Abstract

Provided in the present embodiment are a radio-frequency processing device and a detection method therefor, and a communication system. The radio-frequency processing device comprises a power conversion circuit, a power amplifier, a detection circuit, a first fuse and a current-limiting diode, wherein by means of a positive terminal and a negative terminal of the radio-frequency processing device, the power conversion circuit receives a first voltage supplied by an external direct-current power supply, and converts same into a second voltage, which is then supplied to the power amplifier; the power conversion circuit is connected to a target terminal by means of the first fuse, the target terminal being the positive terminal or the negative terminal, wherein an output end of the first fuse is further connected to an external grounding network and an input end of the current-limiting diode, and an output end of the current-limiting diode is connected to an input end of the detection circuit; and the detection circuit is used for obtaining an indication voltage on the basis of a detection voltage at the input end of the detection circuit, wherein the voltage value of the indication voltage is used for indicating the power supply operating state of the radio-frequency processing device. The present embodiment allows for high-precision fault detection on the basis of reducing the processing precision.

Description

Radio frequency processing device, detection method and communication system

[0001] The present application claims priority from the Chinese patent application No. 202510243893.0 filed on February 28, 2025, and entitled "Radio frequency processing device, detection method and communication system", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of power distribution for wireless communication devices, and in particular to a radio frequency processing device, a detection method and a communication system. BACKGROUND

[0003] A communication system based on wireless communication technology includes a radio frequency processing device and a baseband processing device. The radio frequency processing device includes a radio frequency processing channel and an antenna module. The radio frequency processing channel includes a receiving channel and a transmitting channel. The transmitting channel can obtain a base frequency or intermediate frequency data signal from the baseband processing device, and perform relevant signal processing on the data signal through an up-conversion mixer and a power amplifier in the transmitting channel to transmit a radio frequency signal. The receiving channel can receive a radio frequency signal transmitted by other target communication devices through the antenna module, and process the radio frequency signal based on a power amplifier, a filter, a down-conversion mixer and an analog-to-digital converter in the receiving channel to obtain a data signal required by the baseband processing device. The baseband processing device analyzes the received data signal to obtain relevant service information. Generally, the baseband processing device is arranged in a machine room, and multiple radio frequency processing devices are arranged on a communication tower of a base station. In order to supply power to electronic devices such as power amplifiers in the radio frequency processing devices, a direct current power supply (such as a power distribution cabinet) needs to be configured for the radio frequency processing device. A power conversion circuit in the radio frequency processing device obtains a first voltage from the direct current power supply and converts it into a second voltage required for the operation of electronic devices such as power amplifiers.

[0004] One way to configure the direct current power supply is to arrange the direct current power supply and the radio frequency processing device on the communication tower. In this power distribution architecture, the target interfaces (both positive or both negative) of the radio frequency processing device and the direct current power supply need to be connected to the communication tower, and the tower body structure of the connected communication tower is used as a common grounding network. In this case, the direct current power supply and the radio frequency processing device form a current transmission path based on the grounding network. This makes the electrical signal parameters between the target interfaces of the direct current power supply and the radio frequency processing device very small, so that high-precision sampling devices and detection devices need to be arranged in the radio frequency processing device to accurately detect the power supply state of the radio frequency processing device. SUMMARY

[0005] The embodiment of the present application provides a radio frequency processing device, a detection method and a communication system, which realize accurate detection of the power supply state of the radio frequency processing device while greatly reducing the high requirements on processing precision and sampling precision.

[0006] To achieve the above object, the embodiment of the present application adopts the following technical scheme:

[0007] In a first aspect, a radio frequency processing device is provided, which comprises a power conversion circuit, a power amplifier, a detection circuit, a first fuse and a fuse branch. The power conversion circuit receives a voltage provided by an external power supply through two input interfaces of the radio frequency processing device and provides the voltage to the power amplifier. One of the two input interfaces is a positive electrode and the other is a negative electrode. The first fuse is connected between the power conversion circuit and at least one of the two input interfaces, and one of the two input interfaces is further connected to ground through the first fuse. The fuse branch is connected in parallel with the first fuse corresponding to one of the input interfaces. The fuse branch comprises a second fuse and an anti-reverse circuit connected in series, and the second fuse is further connected to ground through the anti-reverse circuit. The detection circuit is used to detect a voltage between the second fuse and the anti-reverse circuit to obtain an indication voltage. The voltage value of the indication voltage is used to indicate the power supply working state of the radio frequency processing device.

[0008] In the embodiment of the present application, the first fuse is used as the main fuse to ensure power supply safety. When the radio frequency processing device has problems such as positive and negative electrode reverse connection or overload power supply, the first fuse will be blown to avoid problems such as device burning and carbonization caused by power supply failure. On the basis of the first fuse, the fuse branch comprising the second fuse and the anti-reverse circuit is set, wherein the input end of the anti-reverse circuit is connected to the ground network outside the radio frequency processing device. In different power supply working states, due to the different states of the first fuse being blown or being conducted and the different states of the second fuse being blown or being conducted, the connection relationship of the detection point corresponding to the detection circuit with the equivalent circuit of the power conversion circuit and other devices in the radio frequency processing device is also different, so that the electrical signals detected by the detection circuit at the detection point of the fuse branch are obviously different. For example, when the first fuse and the second fuse are both conducted, under the action of the anti-reverse circuit being grounded, the voltage detected by the detection circuit is ground voltage (for example, 0). When the first fuse is blown and the second fuse remains conducted, the voltage at the detection point of the detection circuit will increase. When the first fuse and the second fuse are both converted from being conducted to being blown, the voltage at the detection point of the detection circuit will rise to a higher value. Therefore, the values of the detection voltages obtained by the input end of the detection circuit in different working conditions also have obvious differences. In this way, the requirements on the sampling precision and the detection processing precision of the electrical signals can be reduced. Further, on this basis, high-precision power supply state detection can be realized by using electronic devices with lower processing performance and lower cost.

[0009] In a possible implementation, the radio frequency processing device further includes a control circuit connected with the detection circuit. The control circuit is configured to output an alarm signal according to the indication voltage, and the alarm signal is used to indicate that the power supply fault event occurs in the radio frequency processing device. In the embodiment of the present application, the control circuit can be provided. The indication voltage is processed and analyzed by the control circuit to determine the current power supply working state of the radio frequency processing device. If the radio frequency processing device is currently in a power supply fault state, the control circuit can output a related alarm signal in time to remind the relevant product operation and maintenance personnel, or trigger some electronic devices in the back stage to respond to the fault. The operation safety of the product can be further ensured, and the maintenance efficiency of the product can be improved through the output of the alarm signal.

[0010] In a possible implementation, the insurance branch further includes a current limiter in series with the second fuse and the anti-reverse circuit, the detection point of the detection circuit is located between the current limiter and the anti-reverse circuit, and the alarm signal includes a first alarm signal used to indicate that the power supply overload fault occurs in the radio frequency processing device. The above-mentioned outputting the alarm signal according to the indication voltage includes: under the condition that the first fuse is fused and the second fuse is turned on, outputting the first alarm signal according to the indication voltage. In the embodiment of the present application, the current limiter and the second fuse are designed. When the radio frequency processing device is in the process of normal power supply operation, if the power supply overload problem (i.e. the power supply current is greater than the rated maximum working current) occurs, it represents that the stability of the power supply state of the radio frequency processing device exists. Because the current limiter protects the second fuse, the overload current will make the first fuse fused, but will not make the second fuse fused. Therefore, under the condition that the second fuse branch and the anti-reverse circuit branch simultaneously act on the input end of the detection circuit, the parameter value of the electrical signal of the input end of the detection circuit will be obviously different from the parameter value in the reverse connection working condition and the normal operation working condition, mainly manifested as: the detected voltage is greater than the voltage range in the normal operation and is less than the voltage range in the reverse connection. In this way, the detection circuit can not only identify the normal working condition and the fault working condition, but also accurately distinguish the reverse connection fault working condition and the power supply overload fault working condition from different power supply faults, and give related fault prompts through the corresponding first alarm signal.

[0011] Exemplarily, when the radio frequency processing device is provided with the first fuse, the second fuse and the current limiter, if the reverse connection occurs, because the value of the instantaneous large current of the short circuit is very large, it can still make the second fuse fused. Therefore, the detection voltage in this case and the detection voltage in the power supply fault working condition still have a large degree of distinction.

[0012] Exemplarily, the second fuse has a melting current less than the melting current of the first fuse. In the embodiment of the present application, the second fuse is connected in series with the current limiter. The current limiter can protect the detection circuit, or can protect the second fuse in the case of power supply overload. However, if the melting current of the second fuse is set too large, the melting time point of the second fuse will be significantly later than the melting time point of the first fuse in the case of reverse connection. Therefore, the melting current of the second fuse can be set to be less than the melting current of the first fuse. In some examples, the melting current of the second fuse can be 0.5 A, and the melting current of the first fuse can be 100 A.

[0013] Exemplarily, when the second fuse is set, the output end of the second fuse is also connected with the detection circuit. Through the joint action of the second fuse and the reverse prevention circuit on the input end of the detection circuit, in the case of reverse connection, the second fuse and the first fuse are melted, and the reverse prevention circuit provides an electrical signal to the input end of the detection circuit, so that the mutation of the electrical signal before and after the fault is more obvious. For example, when the reverse connection or overload fault occurs, a significant decrease in current or even a cut-off of current and a gradual increase in voltage can be detected. At the same time, when the reverse connection fault occurs, the degree of change of the electrical signal parameters is significantly greater than that when the overload fault occurs.

[0014] Exemplarily, the current limiter can be implemented by one or more current limiting resistors, or can be implemented by other devices with current limiting function.

[0015] In a possible implementation, the alarm signal includes a second alarm signal, and the second alarm signal is used to indicate that the power supply short circuit fault occurs in the radio frequency processing device. The method of outputting the alarm signal according to the indication voltage includes: outputting the second alarm signal according to the indication voltage in the case that the first fuse is switched from conduction to melting. In the embodiment of the present application, when the target interface of the radio frequency processing device is reversely connected with the power interface of the direct current power supply (for example, when the target interface is the positive interface of the radio frequency processing device and is connected with the negative interface of the direct current power supply), the short circuit fault occurs. The short circuit fault causes the instantaneous current on the transmission line in the radio frequency processing device to rapidly increase, which can cause the internal electronic devices and circuit boards of the radio frequency processing device to be burned and carbonized, and can even cause more serious damage. By arranging the first fuse, the first fuse is rapidly melted in the case of short circuit, and the transmission path is cut off to avoid the risk of carbonization. In the case that the first fuse is switched from conduction to melting, the related first alarm information can be output, so that the operation and maintenance personnel or the electronic device at the back stage can quickly respond to and handle the fault problem. Similarly, in the reverse connection fault, the second fuse is also melted. Because the melting and conduction of the second fuse correspond to the reverse connection fault and the overload fault in the case that the first fuse is melted, the voltage and the current detected by the detection circuit are obviously different in the two different states of the second fuse. Therefore, the detection voltage can be used to distinguish and identify the two fault conditions.

[0016] In a possible implementation, the alarm signal includes a third alarm signal, and the third alarm signal is used to indicate that the radio frequency processing device is in the power supply fault running state. The method of outputting the alarm signal according to the indication voltage includes: outputting the third alarm signal according to the detection voltage in the case that the first fuse is melted and the power amplifier is powered on and runs. In the embodiment of the present application, when the radio frequency processing device has occurred the reverse connection fault or the power supply overload fault, and the radio frequency processing device is powered on again without maintenance, the direct current power supply and the radio frequency processing device can run with the fault through the grounding network. At this time, the detection circuit can generate the indication voltage according to the detection voltage of the input end, and the control circuit outputs the third alarm signal according to the indication voltage to perform the related fault alarm, so as to ensure the running safety.

[0017] Exemplarily, the control circuit is further configured to: control the power amplifier to stop operating in the powered-on state when the first fuse is blown and the power amplifier is in the powered-on state. In the embodiments of the present application, in order to avoid damage caused by faulty operation, the radio frequency processing device can generate an indication voltage according to the detection voltage obtained by the input end of the detection circuit when the power amplifier and other electronic devices are powered on, and determine whether the current is in a faulty operating condition according to the indication voltage. If it is in a state of faulty power supply operation, the power amplifier and other electronic devices can be powered off to ensure the safety of the device and the entire communication system.

[0018] Exemplarily, the control circuit can include an analog-to-digital converter (ADC) and a controller. In some examples, the analog-to-digital converter in the control circuit can multiplex related analog-to-digital conversion devices in the receive channel in the radio frequency processing device. In some examples, the radio frequency processing device is usually provided with related controller devices for overall control, detection and alarm, and the control circuit can directly multiplex the controller devices provided in the radio frequency processing device to realize the functions of the control circuit.

[0019] In a possible implementation, the detection circuit includes a voltage dividing circuit, a first input end of the voltage dividing circuit is the input end of the detection circuit, a second input end of the voltage dividing circuit is used to input a reference voltage, and an output end of the voltage dividing circuit is the output end of the detection circuit. The voltage dividing circuit is configured to obtain an indication voltage according to the detection voltage and the reference voltage. In the embodiments of the present application, by setting the voltage dividing circuit, the voltage dividing circuit inputs the detection voltage and the reference voltage, and adjusts the voltage value of the detection voltage by the reference voltage to output the indication voltage. In different operating conditions, the voltage value of the detection voltage itself has certain differences, and the indication voltage is obtained by reprocessing the reference voltage. The voltage value of the indication voltage is more obvious in the grading condition, and different voltage grades of the indication voltage can be corresponded to different operating conditions. Moreover, based on the more obvious differences of the indication voltage obtained in different operating conditions, the processing precision requirement of the control circuit and other processing devices in the rear stage for processing the indication voltage is also reduced. Lower performance and cost processing devices can be selected to realize high-precision detection and alarm.

[0020] Exemplarily, the detection circuit further comprises a reference voltage circuit; the voltage dividing circuit comprises a first resistor, a second resistor, a third resistor and a fourth resistor; the reference voltage circuit comprises a fifth resistor and a voltage stabilizer. A first end of the first resistor serves as a first input end of the voltage dividing circuit, a second end of the first resistor is connected with a first end of the second resistor, a second end of the second resistor serves as an output end of the voltage dividing circuit, a first end of the third resistor serves as a second input end of the voltage dividing circuit, a second end of the third resistor and a first end of the fourth resistor are respectively connected between the first resistor and the second resistor, and a second end of the fourth resistor is grounded. A first end of the fifth resistor is used for inputting a reference voltage, and a second end of the fifth resistor is connected with the voltage stabilizer to serve as an output end of the reference voltage circuit and provide a reference voltage to the second input end of the voltage dividing circuit. In the embodiment of the application, the fifth resistor can convert a reference voltage (for example, a 2.5V voltage) with a smaller voltage value required by many electronic devices in the radio frequency processing device (for example, a 3.3V voltage) into the reference voltage and provide the reference voltage to the voltage dividing circuit. At the same time, in order to ensure the accuracy of detection, it is necessary to make the voltage value of the reference voltage as stable as possible. At this time, the voltage stabilizer can be arranged to perform voltage stabilization processing on the reference voltage. The first resistor in the voltage dividing circuit can perform first voltage dividing on the voltage detected by the detection circuit, and the third resistor can perform first voltage dividing on the reference voltage. Then, the voltages divided by the first resistor and the third resistor are sent to the second resistor to perform second voltage dividing, and the indication voltage can be obtained. The fourth resistor can play a role in voltage dividing and can isolate the ground end from directly acting on the voltage divided to affect the voltage dividing result. In the case that the parameters of the first resistor, the second resistor, the third resistor, the fourth resistor and the reference voltage are determined, different indication voltages can be output according to different inputted detected voltages. Therefore, the indication voltage processed by the detection circuit can amplify the difference of the detected voltages in different working conditions.

[0021] Exemplarily, the voltage stabilizer can be selected from a controllable voltage stabilizing source and a voltage stabilizing diode.

[0022] Exemplarily, taking the positive electrode interface connection ground network of the radio frequency processing device as an example, when the reference voltage input by the voltage dividing circuit is 2.5 V, the first fuse has a melting current of 100 A, the second fuse has a melting current of 0.5 A, and the direct current power supply provides a first voltage of ±48 V, and when the positive electrode is powered and the radio frequency processing device is normally running, the indication voltage output by the detection circuit is about 0.455 V. In the case of reverse connection short circuit, the indication voltage is about 1.25 V. In the case of power overload, the indication voltage is about 0.62 V. The difference between 0.455 V, 0.62 V and 1.25 V is in the level of zero point several volts, and in the signal processing of electronic devices, the processing accuracy of zero point several volts is very low compared with the processing accuracy of millivolt accuracy level and below. Therefore, the present scheme can realize high-precision identification with reduced sampling accuracy. Moreover, the more serious the type of power failure is, the higher the voltage value of the indication voltage obtained is, which makes the detection accuracy of the present scheme for more serious problems also higher (for example, 1.25 V of reverse connection fault is higher than 0.62 V of overload running).

[0023] In some examples, the reverse prevention circuit is a unidirectional conduction circuit. Exemplarily, the unidirectional conduction circuit can be a thyristor, a transistor or a diode, etc. The diode can be a current limiting diode, etc. Exemplarily, taking the reverse prevention circuit including a current limiting diode as an example: the input end of the current limiting diode is grounded, and the output end of the current limiting diode is connected with the second fuse and the detection circuit. In the embodiment of the present application, the current limiting diode can play a role in current limiting, and through current limiting protection, it can avoid the burning of the detection circuit by the large current from the ground side in the reverse connection working condition. At the same time, the current limiting diode can play a role in unidirectional conduction of reverse prevention, so as to avoid the reverse flow of the current on the transmission path of the second fuse into the ground end.

[0024] Exemplarily, the radio frequency processing device can be a remote radio unit (RRU), and can also be an active antenna unit (AAU), etc.

[0025] Secondly, embodiments of this application provide a detection method applied to a radio frequency (RF) processing device. The RF processing device includes a power conversion circuit, a power amplifier, a detection circuit, a first fuse, and a fuse branch. The detection method includes: the power conversion circuit receiving voltage from an external power supply through two input interfaces of the RF processing device and supplying it to the power amplifier, one input interface being positive and the other negative; the fuse branch being connected in parallel with the first fuse corresponding to one of the input ports; the fuse branch including a second fuse connected in series and a reverse protection circuit, with the second fuse also grounded through the reverse protection circuit; and the detection circuit detecting the voltage between the second fuse and the reverse protection circuit to obtain an indication voltage, the value of which is used to indicate the power supply operating status of the RF processing device.

[0026] In one possible implementation, the detection method further includes: outputting an alarm signal based on an indicated voltage, the alarm signal being used to indicate a power supply failure event in the radio frequency processing device.

[0027] In one possible implementation, the radio frequency processing device further includes a current limiter connected in series with a second fuse and a reverse protection circuit. The detection point of the detection circuit is located between the current limiter and the reverse protection circuit. The alarm signal includes a first alarm signal, which indicates that a power supply overload fault has occurred in the radio frequency processing device. Outputting the alarm signal based on the indicated voltage includes: under the condition that the first fuse has blown and the second fuse is conducting, outputting the first alarm signal based on the indicated voltage.

[0028] In one possible implementation, the alarm signal includes a second alarm signal for indicating a power supply short-circuit fault in the radio frequency processing device. The above-described output of the alarm signal based on the indicated voltage includes: outputting the second alarm signal based on the indicated voltage under the condition that the first fuse and the second fuse switch from conducting to blowing.

[0029] In one possible implementation, the alarm signal includes a third alarm signal, which indicates that the RF processing device is operating with a power supply failure. The above-mentioned output of the alarm signal based on the indicated voltage includes: outputting the third alarm signal based on the detected voltage under the condition that the first fuse has blown and the power amplifier is powered on.

[0030] In one possible implementation, the method further includes: controlling the power amplifier to power down and stop operating when the first fuse blows and the power amplifier is powered on.

[0031] Thirdly, embodiments of this application also provide a communication system, which includes a DC power supply, a grounding network, and a radio frequency processing device as described in the first aspect above. The two output interfaces of the DC power supply are respectively connected to the two input interfaces of the radio frequency processing device in a one-to-one correspondence. One of the two output interfaces is connected to the grounding network, and one of the two input interfaces is also connected to the grounding network. One output interface and one input interface are both positive or negative terminals.

[0032] In one possible implementation, the communication system further includes a baseband processing device, and the radio frequency processing device further includes a control circuit connected to the detection circuit. The control circuit is used to: output an alarm signal to the baseband processing device, the alarm signal indicating a power supply failure event in the radio frequency processing device.

[0033] For example, the communication system may be a network device that communicates with terminal devices. The network device may include a transmission and reception point (TRP), a base station, a remote radio unit (RRU) or baseband unit (BBU) of a split base station (also known as a digital unit (DU)), a relay station, or an access point, etc.

[0034] In addition, a base station can be a base transceiver station (BTS) in a global system for mobile communication (GSM) or code division multiple access (CDMA) network, an NB (Node B) in a wideband code division multiple access (WCDMA) network, an eNB or eNodeB (evolutionary Node B) in LTE, a radio controller in a cloud radio access network (CRAN) scenario, or a base station in a 5G communication system (such as a next-generation Node B (gNodeB, gNB)), or a base station in a future evolved network, etc., without being specifically limited here.

[0035] For example, a base station can be a wireless communication base station, an encrypted base station, a backpack base station, or a small base station.

[0036] Regarding the technical principles and beneficial effects of the second and third aspects mentioned above, please refer to the relevant records of the first aspect mentioned above, which will not be repeated here. Attached Figure Description

[0037] Figure 1 is a schematic diagram of a communication system provided in an embodiment of this application;

[0038] Figure 2 is a schematic diagram of the structure of a radio frequency processing device provided in an embodiment of this application;

[0039] Figure 3 is a schematic diagram of the field deployment of a communication system provided in an embodiment of this application;

[0040] Figure 4 is a schematic diagram of the field deployment of a communication system based on DC-I architecture provided in an embodiment of this application;

[0041] Figure 5 is a schematic diagram of the field deployment of a communication system based on a DC-C architecture provided in an embodiment of this application;

[0042] Figure 6 is a schematic diagram of the structure of a radio frequency processing device provided in an embodiment of this application;

[0043] Figure 7 is a schematic diagram of a radio frequency processing device provided in this application forming a power supply return loop based on a grounding network after the fuse blows;

[0044] Figure 8 is a schematic diagram of the structure of a radio frequency processing device provided in an embodiment of this application;

[0045] Figure 9 is a schematic diagram of the structure of a radio frequency processing device provided in an embodiment of this application;

[0046] Figure 10 is a schematic diagram of the structure of a radio frequency processing device provided in an embodiment of this application;

[0047] Figure 11 is a schematic diagram of the structure of a radio frequency processing device provided in an embodiment of this application;

[0048] Figure 12 is a schematic diagram of the structure of a radio frequency processing device provided in an embodiment of this application;

[0049] Figure 13 is a schematic diagram of the result of a second detection circuit provided in an embodiment of this application;

[0050] Figure 14 is a schematic diagram of the structure of a radio frequency processing device provided in an embodiment of this application;

[0051] Figure 15 is a schematic flowchart of a detection method provided in an embodiment of this application;

[0052] Figure 16 is a schematic diagram comparing the operation and testing of an RF processing device under different operating conditions according to an embodiment of this application.

[0053] Figure 17 is a schematic flowchart of a detection method provided in an embodiment of this application. Detailed Implementation

[0054] It should be noted that the terms "first" and "second" used in the embodiments of this application are only used to distinguish features of the same type and should not be construed as indicating relative importance, quantity, order, etc.

[0055] The terms "exemplary" or "for example" used in the embodiments of this application are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0056] The terms "coupling" and "connection" used in the embodiments of this application should be interpreted broadly. For example, they can refer to a physical direct connection or an indirect connection achieved through electronic devices, such as a connection achieved through resistors, inductors, capacitors or other electronic devices.

[0057] This application provides an exemplary communication system, as shown in FIG1. ​​The communication system 1000 includes a baseband processing device 100 and a radio frequency (RF) processing device 200. The baseband processing device 100 is used to: provide data signals to the RF processing device 200 based on service information, or receive data signals from the RF processing device 200 and parse them to obtain service information. The RF processing device 200 is used to: acquire data signals from the baseband processing device 100; up-convert the data signals into RF signals; and transmit the RF signals to a target communication device. Alternatively, it can receive RF signals transmitted by a target communication device in space; down-convert the RF signals into data signals; and transmit the data signals to the baseband processing device.

[0058] For example, the communication system 1000 can be a wireless communication base station, an encrypted station, a backpack station, or a small station.

[0059] For example, the radio frequency processing device 200 can be a remote radio unit (RRU) or an active antenna unit (AAU), etc.

[0060] For example, as shown in FIG2, the radio frequency processing device 200 may include a radio frequency processing channel 210 and an antenna module 220. The radio frequency processing channel 210 may include a receive channel RX and a transmit channel TX, both of which are connected to the antenna module 220 and the baseband processing device 100, respectively. Depending on the design architecture on which the radio frequency processing device 200 is based, the receive channel RX and the transmit channel TX can be based on different design architectures to process radio frequency signals. Typically, the receive channel RX includes a low-noise power amplifier, a down-conversion mixer, a low-pass filter, and an analog-to-digital converter, etc. The transmit channel TX includes a digital-to-analog converter, a band-pass filter, an up-conversion mixer, and a radio frequency power amplifier, etc. Typically, in high-speed communication applications, devices such as power amplifiers (including low-noise power amplifiers and radio frequency power amplifiers), analog-to-digital converters, and digital-to-analog converters operate at high power and require a large power supply.

[0061] Figure 3 provides an exemplary installation diagram of the communication system 1000 in a practical facility design. Configuring the communication system 1000 requires designing a computer room and a communication tower T. Typically, the baseband processing device 100 is located in the computer room, and the radio frequency (RF) processing device 200 is mounted on the communication tower T. The baseband processing device 100 communicates with the RF processing device 200 via optical fiber. To power the RF processing device 200 located on the communication tower T, a corresponding power supply system must also be designed. In some possible implementations, the communication system 1000 may include both AC and DC power supplies to power the RF processing device 200, for example, to power the power amplifiers within the RF processing device 200.

[0062] In some possible implementations, the communication system 1000 shown in Figure 3 can power the radio frequency processing devices 200 based on a direct current to intermediate (DC-I) architecture. As shown in Figure 4, under the DC-I architecture, the communication system 1000 includes a baseband processing device 100, multiple radio frequency processing devices 200, and a DC power supply 300. The baseband processing device 100 is located in a computer room, the radio frequency processing devices 200 are mounted on a communication tower T, and the DC power supply 300 is typically located below the communication tower T. The DC power supply 300 is connected to the multiple radio frequency processing devices 200 on the communication tower T. The DC-I architecture refers to the following: the DC power supply 300 obtains AC power from a remote AC power supply 400 (e.g., the power grid), converts the AC power into high-voltage DC power, and transmits the high-voltage DC power to different radio frequency processing devices 200 via power cables, thereby centrally powering multiple different radio frequency processing devices 200 on one or more communication towers T.

[0063] In some possible implementations, the communication system 1000 shown in Figure 1 can be a communication system based on a direct current to cell (DC-C) architecture. As shown in Figure 5, the communication system 1000 includes a baseband processing device 100, multiple radio frequency (RF) processing devices 200, and multiple DC power supplies 300. The baseband processing device 100 is located in a data center, and the multiple RF processing devices 200 can be located on the same or different communication towers T. The multiple DC power supplies 300 are located on the communication towers T. Each DC power supply 300 is connected to one or more RF processing devices 200 on the same communication tower T. Compared to the DC-I power supply architecture, in the DC-C architecture, the DC power supplies are closer to the RF processing devices 200. The power supply method based on the DC-C architecture is to place each DC power supply 300 closer to its corresponding RF processing device 200. In this distributed power supply method, the AC power supply 400 transmits AC power to different DC power supplies 300 via long-distance power cables. The DC power supply 300 then converts the AC power into DC power and supplies DC power to the radio frequency processing equipment 200 through a short power cable.

[0064] In both the DC-I power supply scenario shown in Figure 4 and the DC-C power supply scenario shown in Figure 5, the communication system can include a grounding network. Typically, a portion of the communication tower T is used as the grounding network. In some examples, the external power supply can be connected to the grounding network via its positive terminal. In other examples, the external power supply can be connected to the grounding network via its negative terminal. Furthermore, compared to traditional power supply architectures and DC-I architectures, in the DC-C architecture, the radio frequency processing device 200 also needs to be connected to the grounding network. For example, when the positive terminal of the DC power supply is connected to the grounding network, the radio frequency processing device 200 is also connected to the grounding network via its positive terminal; when the negative terminal of the DC power supply is connected to the grounding network, the radio frequency processing device 200 is also connected to the grounding network via its negative terminal. In the following embodiments of this application, the interface connected to the grounding network is defined as the target interface.

[0065] Preferably, to ensure that the underground grounding grid of the power supply facilities is not corroded and to achieve lightning protection, as shown in Figure 6, in the DC-C architecture, the positive terminal of the DC power supply 300' and the positive terminal of the RF processing device 200' can be connected to the grounding network 500'. The RF processing circuit 200' also includes a power conversion circuit 230'. The power conversion circuit 230' is connected to the positive interface P1' and negative interface N1' of the RF processing circuit 200', respectively, with the corresponding positive interface P2' and negative interface N2' of the DC power supply 300'. In Figure 6, when the positive interface P1' of the RF processing circuit 200' serves as the first target interface for connecting to the grounding network 500' via the grounding interface G', the positive interface P2' of the DC power supply 300' serves as the second target interface for connecting to the grounding network 500'. Alternatively, although not shown in Figure 6 and the accompanying figures below, when the negative interface N1' of the RF processing circuit 200' serves as the first target interface for connecting to the ground network 500' via the ground interface G', the negative interface N2' of the DC power supply 300' serves as the second target interface for connecting to the ground network 500.

[0066] In some embodiments, as shown in FIG6, the power conversion circuit 230' is used to convert a first voltage provided by the DC power supply 300' into a second voltage. The first voltage is a voltage signal with a higher voltage value provided by the DC power supply 300'. Inside the radio frequency processing device 200', there are many electronic components. These components typically require low operating voltages, and different electronic components may require multiple different operating voltages. Typically, the radio frequency processing device 200' is designed with power processing circuitry to convert to different operating voltages. The power conversion circuit 230' converts the first voltage into a second voltage adapted to different electronic components. For example, different electronic components within some radio frequency processing channels 210' may require different operating voltages, such as the second voltage required by the power amplifier PA' within the radio frequency processing channel 210'. Exemplarily, the power conversion circuit 230' includes an electromagnetic compatibility (EMC) filter and multiple power processing modules. After the received first voltage is subjected to correlation filtering and anti-interference processing by an electromagnetic compatibility filter, multiple power processing modules in the subsequent stage perform correlation processing to generate the operating voltage required by different electronic devices. For example, a certain power processing module generates the second voltage required for the power amplifier PA' to operate.

[0067] When the power conversion circuit 230' is used in a DC-C scenario, to prevent the positive interface P1' and negative interface N1' of the RF processing device 200' from being reverse-connected with the positive interface P2' and negative interface N2' of the DC power supply 300' (i.e., positive interface P1' connected to negative interface N2', and positive interface P2' connected to negative interface N1'), which could lead to a short circuit and carbonization of the RF processing device 200', as shown in Figure 6, multiple fuses F' are typically designed inside the RF processing device 200'. The power conversion circuit 230' is connected to the positive interface P1' and negative interface N1' through these multiple fuses F'. When a reverse connection occurs, the instantaneous large current input to the RF processing device 200' will cause the fuses F' to melt quickly, preventing the short circuit current caused by the reverse connection from causing the RF processing circuit 200' to overheat and burn out, resulting in carbonization damage.

[0068] However, as shown in Figure 7, if the fuse F' inside the RF processing device 200' blows due to reverse connection and is then reconnected to the correct orientation, due to the special nature of the DC-C architecture, the first target interface of the DC power supply 300' (taking the positive interface P2' as an example in Figure 7) will form a power supply return loop with the power conversion circuit 230' inside the RF processing device 200' through the grounding network 500' (as shown by the dashed arrow in Figure 7). This could cause the power conversion circuit 230' and some downstream devices in the RF processing device 200' to operate under a power supply fault condition. Therefore, in order to achieve safe and stable operation of the RF processing device 200', it is necessary to detect different power supply operating states of the RF processing device 200' (such as normal operation, reverse connection, and operation under power supply fault conditions).

[0069] In some possible implementations, the radio frequency processing device 200' can achieve fault detection based on voltage sampling using a sampling resistor. A sampling resistor and a related first detection circuit can be set at the first target interface connection of the radio frequency processing device 200'. As shown in Figure 8, the sampling resistor R1' is set on the output side of the fuse F corresponding to the first target interface. The first detection circuit 240A' includes cascaded operational amplifiers U1' and U2', with the two input terminals of operational amplifier U1' connected to the input terminal of sampling resistor R1' and the output terminal of sampling resistor R2', respectively. After the first-stage operational amplifier U1' amplifies the voltage across the sampling resistor R1', the second-stage operational amplifier U2' performs another operational amplification. The resulting current can be called the indicator voltage, and the magnitude of the indicator voltage corresponds to the magnitude of the current flowing into the fuse F' on the first target interface side of the radio frequency processing device 200'. For example, when the circuit is operating normally, the current flowing into the fuse F' is greater than a certain current value. When reversed, the fuse F' corresponding to the first target interface blows, and the current flowing into fuse F' is zero, so the detected current value will be less than a certain current value. After fuse F' blows, if the RF processing device 200' is connected to the DC power supply 300' and the power conversion circuit 230' and related electronic components (such as power amplifier PA') in the subsequent RF processing channel 210' are powered on and running, the RF processing device 200' can be detected as operating with a power supply fault based on the change in the electrical signal across the sampling resistor R1'. For example, to better detect the change in the electrical signal across the sampling resistor R1', the two ends of the operational amplifier U1' can be connected to the two ends of the sampling resistor R1' via resistors R2' and R3'.

[0070] However, in the embodiment shown in Figure 8, the following technical problems exist:

[0071] Technical Issue 1: Due to the DC-C architecture, both the first and second target interfaces are connected to the ground network 500'. This means that during power supply, the main return path for the corresponding power supply electrodes (positive or negative) of the first and second target interfaces is transmitted through the ground wire, while the current flowing through the first target interface is typically very small. This places very high demands on sampling accuracy. Even using a sampling resistor R1' combined with a two-stage operational amplifier structure cannot fully meet the requirements for high-precision sampling and detection.

[0072] Technical Issue 2: The implementation shown in Figure 8 requires multiple resistors. This application scenario demands high-performance resistors, requiring protection against lightning strikes (e.g., withstands 10kA of lightning). Selecting such high-performance resistors is difficult. Furthermore, using multiple 0.5mΩ 2512 gold film resistors as an example, multiple resistors are expensive, and combined with multi-stage operational amplifiers, the hardware cost is high.

[0073] To address the poor sampling accuracy issue in the embodiment shown in Figure 8, the RF processing device 200 can utilize relevant configuration devices to change the electrical signal at the input of the detection circuit under different operating conditions. This increases the difference between the sampled electrical signals under different operating conditions. A second detection circuit is then used to detect the relevant electrical signals, thus overcoming the poor sampling accuracy problem. As shown in Figure 9, based on the RF processing device 200 described in the embodiments of Figures 1, 2, 3, 4, 5, 6, and 7, the RF processing device 200 includes an RF processing channel 210, an antenna module 220, a power conversion circuit 230, a second detection circuit 240B, a first fuse F1, and a fuse branch. The RF processing channel 210 includes electronic components such as a power amplifier PA. The power conversion circuit 230 receives a first voltage provided by an external DC power supply through two input interfaces of the RF processing device 200 and converts it into a second voltage to supply to the power amplifier PA. One input interface is a positive terminal (P1), and the other is a negative terminal (N1). Wherein: the first fuse F1 is connected between the power conversion circuit 230 and at least one of the two input interfaces, and one of the two input interfaces is also grounded through the first fuse F1. This at least one input interface is the target interface mentioned in the above embodiment for connecting to the grounding network 500. The fuse branch is connected in parallel with the first fuse F1 corresponding to the target interface. The fuse branch includes a second fuse F2 connected in series and a reverse protection circuit D, and the second fuse F2 is also grounded through the reverse protection circuit D. The second detection circuit 240B is used to detect the voltage between the second fuse F2 and the reverse protection circuit D to obtain an indication voltage. The voltage value of the indication voltage is used to indicate the power supply operating status of the radio frequency processing device 200.

[0074] In some examples, the reverse protection circuit D is a unidirectional conduction circuit. Exemplarily, the unidirectional conduction circuit can be a thyristor, transistor, or diode, etc. The diode can be a current-limiting diode, etc. For example, taking a reverse protection circuit including a current-limiting diode as an example: the input terminal of the current-limiting diode is grounded, and the output terminal of the current-limiting diode is connected to the second fuse and the detection circuit. In the embodiments of this application, the use of a current-limiting diode can limit the current, preventing the large current transmitted from the ground side from burning out the detection circuit under reverse connection conditions. Simultaneously, the current-limiting diode can provide unidirectional conduction for reverse protection, preventing the current on the transmission path of the second fuse, etc., from flowing backwards to the ground terminal.

[0075] In the embodiment shown in FIG9 of this application, the first fuse F1 serves as the main fuse to ensure power supply safety. Based on the first fuse F1, a second fuse F and a reverse protection circuit D are provided, with the input terminal of the reverse protection circuit D connected to the grounding network 500. The input terminal of the reverse protection circuit D is connected to the grounding network 500 outside the radio frequency processing device 200. Under different power supply conditions, due to the different states of the first fuse F1 (fuse blown or conducting) and the different states of the second fuse F2 (fuse blown or conducting), the equivalent circuit connection relationship between the detection point corresponding to the second detection circuit 240B and devices such as the power conversion circuit 230 within the radio frequency processing device 200 is also different. This results in significantly different electrical signals detected by the second detection circuit 240B at the detection point of the fuse branch.

[0076] Compared to the electrical signal obtained by sampling the sampling resistor R1 in the structure shown in Figure 8, the detection voltage obtained in the embodiment shown in Figure 9 of this application varies more significantly under different operating conditions. For example, when both the first fuse F1 and the second fuse F2 are conducting, the voltage detected by the second detection circuit 240B is ground voltage (e.g., 0) due to the grounding effect of the anti-reverse circuit D. When the first fuse F1 blows while the second fuse F2 remains conducting, the voltage at the detection point of the second detection circuit 240B will increase. And when both the first fuse F1 and the second fuse F2 switch from conducting to blowing, the voltage at the detection point of the second detection circuit 240B will rise even higher. Therefore, the detection voltage value obtained by the input terminal of the second detection circuit 240B under different operating conditions also has significant differences. In this way, the requirements for the sampling accuracy and detection processing accuracy of the detected electrical signal can be reduced. Furthermore, based on this, high-precision power supply status detection can be achieved with electronic devices of lower processing performance and lower cost. Taking the first target interface of the radio frequency processing device 200 connected to the grounding network 500 as the positive interface P1 as an example, the second target interface of the DC power supply 300 connected to the grounding network 500 is the positive interface P2. In this case, when the negative interface N2 of the DC power supply 300 is reverse-connected to the positive interface P1 of the radio frequency processing device 200, the instantaneous large current generated by the short circuit causes the first fuse F1 to blow. Meanwhile, the positive interface P2 of the DC power supply 300 outputs an electrical signal to the reverse protection circuit D through the grounding network 500. Due to the unidirectional conduction and current limiting effect of the reverse protection circuit D, this electrical signal will not damage the second detection circuit 240B. Therefore, when a short circuit fault occurs, the first fuse F1 and the second fuse F2 break. Combined with the current output by the reverse protection circuit D, this causes a significant voltage jump at the output of the second detection circuit 240B (specifically, the voltage rises from the grounded 0 voltage). Because the detection voltage varies more significantly with operating conditions, the accuracy requirements for sampling are greatly reduced during subsequent electrical signal processing. The second detection circuit 240B processes the detection voltage, which exhibits more pronounced variations, to obtain an indication voltage. Different values ​​of the obtained indication voltage correspond to different power supply operating states of the RF processing device 200.

[0077] For example, as shown in FIG9, in addition to connecting the first fuse F1 at the positive interface P1, which is the first target interface, for power supply safety, the fuse F can also be connected at the negative interface N1, which is not the first target interface.

[0078] In one example, as shown in Figure 10, the RF processing device 200 further includes a current limiter 270B. The input terminal of the second detection circuit 240B is connected to the input terminal of the first fuse F1 via the second fuse F2. The output terminal of the second fuse F2 is connected to the input terminal of the second detection circuit 240B via the current limiter 270B. In this embodiment, the current limiter 270B limits the current flowing into the second fuse F2. In the case of reverse connection, the instantaneous large current of the short circuit can still cause the first fuse F1 and the second fuse F2 to blow. However, when the current input to the RF processing device 200 exceeds the rated maximum operating current, the RF processing device 200 is in a power supply overload state, which may cause operational reliability issues. But at this time, due to the limitation of the current limiter 270B, the overload current will only cause the first fuse F1 to blow, but will not cause the second fuse F2 to blow. By setting the current limiter 270B, it is possible to distinguish between power supply overload faults and power supply reverse connection faults. Compared with the embodiment shown in Figure 8, the embodiment shown in Figure 10 can also detect the reliability of power supply operation.

[0079] For example, the fusing current of the second fuse F2 is less than that of the first fuse F1.

[0080] For example, the current limiter 270B can be implemented by selecting one or more current-limiting resistors, or by selecting other devices with current-limiting functions.

[0081] For example, when the second fuse F2 and the current limiter 270B are configured, the output terminal of the second fuse F2 is also connected to the second detection circuit 240B. The second fuse F2 and the reverse protection circuit D jointly provide an electrical signal to the input terminal of the second detection circuit 240B. In the case of reverse connection, the second fuse F2 and the first fuse F1 blow, and the reverse protection circuit D provides an electrical signal to the input terminal of the second detection circuit 240B, making the abrupt change in the electrical signal before and after the fault more pronounced.

[0082] For example, as shown in FIG11, the second detection circuit 240B includes a voltage divider circuit 241B. The first input terminal of the voltage divider circuit 241B serves as the input terminal of the second detection circuit 240B, the second input terminal of the voltage divider circuit 241B is used to input a reference voltage, and the output terminal of the voltage divider circuit 241B serves as the output terminal of the second detection circuit 240B. The voltage divider circuit 241B is used to obtain an indication voltage based on the detection voltage and the reference voltage. In this embodiment, processing the detection voltage with the reference voltage makes the difference between the detection voltages under different operating conditions more obvious. In this case, the difference in the voltage value of the obtained indication voltage will also be greater. This can greatly improve the distinguishability of the voltage values ​​of the indication voltage corresponding to different operating conditions, making it easier for subsequent related devices to identify different power supply operating states of the radio frequency processing device 200 based on the indication voltage.

[0083] For example, as shown in Figure 11, the voltage divider circuit 241B may include multiple resistors R, which are connected in parallel and / or series to form the voltage divider circuit. In practical applications, the number of resistors R, their resistance parameters, and connection size can be adaptively selected according to the selection of components in the RF processing device 200, its operating status, the application scenario, and the amount of data processed.

[0084] For example, as shown in FIG11, the second detection circuit 240B further includes a reference voltage circuit 242B. The reference voltage circuit 242B is used to input a reference voltage, generate a reference voltage based on the reference voltage, and provide it to the second input terminal of the voltage divider circuit 241B. For example, the reference voltage circuit 242B may include multiple resistors to divide the input reference voltage to obtain a reference voltage of the desired value. In this embodiment, the voltage generated by the power supply device in the RF processing device 200 to power the devices in the RF processing channel 210 can be used as the reference voltage, and the desired reference voltage can be obtained by voltage division using resistors. For example, many devices require a 3.3V operating voltage, and a 3.3V reference voltage is typically generated within the device. The reference voltage circuit 242B obtains a reference voltage (e.g., 2.5V) by dividing the 3.3V voltage.

[0085] Exemplarily, as shown in FIG12, the second detection circuit 240B further includes a reference voltage circuit 242B. The second detection circuit 240B includes a first resistor R11, a second resistor R12, a third resistor R13, and a fourth resistor R14. The reference voltage circuit 242B includes a fifth resistor R15 and a voltage regulator W. The first end of the first resistor R11 serves as the first input terminal of the voltage divider circuit 241B. The second end of the first resistor R11 is connected to the first end of the second resistor R12, and the second end of the second resistor R12 serves as the output terminal of the voltage divider circuit 241B. The first end of the third resistor R13 serves as the second input terminal of the voltage divider circuit 241B. The second end of the third resistor R13 and the first end of the fourth resistor R14 are respectively connected between the first resistor R11 and the second resistor R12. The second end of the fourth resistor R14 is grounded. The first end of the fifth resistor R15 is used to input a reference voltage. The second end of the fifth resistor R15, after being connected to the voltage regulator W, serves as the output terminal of the reference voltage circuit 242B and provides a reference voltage to the second input terminal of the voltage divider circuit 241B. In this embodiment, the fifth resistor R15 converts the reference voltage (e.g., 3.3V) required for the operation of many electronic components in the RF processing equipment into a smaller reference voltage (e.g., 2.5V) and provides it to the voltage divider circuit 241B. Simultaneously, to ensure detection accuracy, the reference voltage needs to be kept as stable as possible. A voltage regulator W can be used to regulate the reference voltage. The first resistor R11 in the voltage divider circuit 241B divides the voltage detected by the second detection circuit 240B, and the third resistor R13 divides the reference voltage. Then, the voltage divided by the first resistor R11 and the third resistor R13 is fed into the second resistor R12 for another voltage division to obtain the indication voltage. The fourth resistor R14 provides a voltage divider and isolates the ground terminal from the voltage division result, preventing direct interaction between the ground terminal and the divided voltage. With the parameters of the first resistor R11, the second resistor R12, the third resistor R13, the fourth resistor R14, and the reference voltage determined, different indicator voltages can be output depending on the input detected voltage. Therefore, the indicator voltage processed by the second detection circuit 240B can amplify the differences in the detected voltage under different operating conditions.

[0086] For example, the voltage regulator W can be selected from devices such as a controllable voltage regulator and a Zener diode.

[0087] In some possible implementations, as shown in FIG13, the radio frequency processing device 200 further includes a control circuit 260, which is connected to the second detection circuit 240B. The control circuit 260 is used to output an alarm signal based on an indicated voltage, the alarm signal indicating a power supply failure event in the radio frequency processing device 200. In this embodiment, the control circuit 260 determines the current power supply operating state of the radio frequency processing circuit 200 based on the indicated voltage output by the second detection circuit 240B. When the current power supply operating state of the radio frequency processing circuit 200 is a power supply failure state, the radio frequency processing circuit 200 can output a corresponding alarm signal to indicate the corresponding power supply failure.

[0088] For example, control circuitry 260 may include an analog-to-digital converter (ADC) and a controller.

[0089] In one example, the analog-to-digital converter 261 of the control circuit 260 can reuse the analog-to-digital converter within the radio frequency processing channel 210. For example, an analog-to-digital converter is provided in the receiving channel RX of the radio frequency processing channel 210 shown in Figure 2. The receiving channel TX receives radio frequency signals transmitted by other communication devices in space through the antenna radiator of the antenna module 220. After the low-noise power amplifier in the receiving channel RX amplifies the radio frequency signal, it is filtered by a bandpass filter. Then, it is down-converted by a down-converter mixer to obtain an intermediate frequency signal or a baseband signal. The down-converted signal is then converted from analog to digital by the analog-to-digital converter to obtain a digital signal. The radio frequency processing device 200 is provided with related optoelectronic conversion devices (such as optical modules including photodiodes) to convert the digital signal into an optical signal, which is then transmitted through optical fiber to the baseband processing device 100 to complete related service interactions. Because analog-to-digital converters are expensive, the control circuit 260 can reuse the analog-to-digital converter of the receiving channel RX to perform analog-to-digital conversion on the indicated voltage, thereby obtaining a digital signal that the controller 262 can process.

[0090] In one example, the radio frequency (RF) processing device 200 typically includes controllers for detecting the operating state of the RF processing channel 210 and controlling its operating state and power. For example, controllers may control the electronic components in the RF processing device 200 to operate in an idle state, a low-power state, or a high-performance state, or they may control the electronic components to operate in different frequency bands. By reusing relevant controllers within the RF processing device 200 as controllers 262 within the control circuit 260, device costs can be reduced.

[0091] In one possible implementation, since the RF processing equipment 200 is located at a high position such as a communication tower T, the various fault detection devices within the RF processing equipment 200 typically transmit the fault to the equipment room near the maintenance personnel after detecting various faults in the RF processing equipment 200. The control circuit 260 described in the embodiment of Figure 13 can transmit alarm signals to the baseband processing equipment 100. As shown in Figure 14, Figure 14 illustrates the control circuit 260 described in the embodiment of Figure 13, which uses the analog-to-digital converter (ADC) of the receiving channel RX within the RF processing channel 210 as the ADC 261 of the control circuit 260, and the related control devices of the multiplexed RF processing channel 210 as the controller 262. The second detection circuit 240B outputs an indication voltage based on the detection voltage at the input terminal. The ADC 261 within the control circuit 260 performs analog-to-digital conversion on the indication voltage to obtain a digital signal with a relevant value. The controller 262 determines the current power supply status of the RF processing equipment 200 based on the value of the digital signal. When the RF processing device 200 is in a power failure state, the controller 262 outputs an alarm signal. For example, the RF processing device 200 and the baseband processing device 100 are connected via optical fiber, and both devices have optical modules at their fiber optic connection points for photoelectric conversion. The optical module interface within the RF processing device 200 converts the alarm signal into an optical signal, which is then transmitted to the baseband processing device 100 via optical fiber. The optical module interface of the baseband processing device 100 converts the received optical signal into an electrical signal, parses it to obtain the relevant alarm signal, and executes a series of subsequent alarm notification operations.

[0092] Based on the radio frequency processing device 200 including the structures shown in Figures 9, 10, 11, 12, 13, and 14 above, a detection method including steps S100-S200 as shown in Figure 15 can be performed:

[0093] S100, the first target interface of the radio frequency processing device 200 is connected to the DC power supply 300.

[0094] For example, when the RF processing device 200 is normally connected, the first target interface of the RF processing device 200 is connected to the second target interface of the DC power supply 300. When the RF processing device 200 is reverse-connected, the first target interface of the RF processing device 200 is connected to the non-second target interface (i.e., the opposite electrode) of the DC power supply 300.

[0095] S200: Obtain the indication voltage based on the detection voltage at the input terminal of the second detection circuit 240B.

[0096] In some possible implementations, as shown in Figures 9, 10, 11, 12, 13 and 14, the value of the detection voltage at the input terminal of the second detection circuit 240B within the radio frequency processing device 200 will vary significantly depending on the power connection state of the radio frequency processing device 200.

[0097] For example, in the embodiment of Figure 16, taking the first target interface as the positive interface P1 and the second target interface as the positive interface P2, when the reference voltage is 2.5V, the fusing current of the first fuse F1 is 100A, the fusing current of the second fuse F2 is 0.5A, and the DC power supply 300 provides a first voltage of ±48V, examples of various operating conditions are as follows:

[0098] When the DC power supply 300 is positively connected to the RF processing device 200 and is supplying power normally, the first fuse F1 and the second fuse F2 are working normally. As shown in Figure 16(a), at this time, the detection voltage at the input terminal of the second detection circuit 240B remains stable, and the indication voltage processed by the second detection circuit 240B is 0.455V.

[0099] When the DC power supply 300 is reverse-connected to the RF processing device 200, the negative interface N2 is connected to the positive interface P1. A short circuit in this case will cause the first fuse F1 and the second fuse F2 to blow. As shown in Figure 16(b), the positive interface P2 forms a current loop through the grounding network 500 to transmit an electrical signal to the reverse protection circuit D of the RF processing device 200. The reverse protection circuit D transmits an electrical signal to the input terminal of the second detection circuit 240B. At this time, the detection voltage at the input terminal of the second detection circuit 240B changes significantly, causing the detected voltage to increase significantly and the current to decrease, thus allowing the processing of different voltage indication values. The indication voltage at this time can reach approximately 1.25V.

[0100] When the DC power supply 300 is positively connected to the RF processing device 200 but the power supply is overloaded, the overload current will cause the first fuse F1 to blow, as shown in Figure 16(c). At this time, a current limiter 270B is also provided. The current limiter 270B protects the second fuse F2. If the input electrical signal is overloaded, the first fuse F1 will blow, but the second fuse F2 will remain conducting. At this time, there is a ground voltage difference between the positive interface P1 and the ground network 500. As long as this ground voltage difference is greater than 0.3V, the second detection circuit 240B can output an indication voltage greater than 0.62V.

[0101] Based on the analysis of the embodiment in Figure 16 above, it can be seen that when the electrode is connected in the correct direction for power supply and is operating normally, the indicator voltage output by the second detection circuit 240B is approximately 0.455V. In the case of reverse connection and short circuit, the indicator voltage is approximately 1.25V. In the case of power supply overload, the indicator voltage is approximately 0.62V. The difference between 0.455V, 0.62V, and 1.25V is on the order of a few tenths of a volt. From the perspective of signal processing in electronic devices, the processing accuracy requirement of a few tenths of a volt is very low compared to the processing accuracy at the millivolt level and below. Therefore, this solution can achieve high-precision identification while reducing sampling accuracy. Furthermore, the more severe the power supply fault, the higher the obtained indicator voltage value, which makes the detection accuracy of this solution higher for more severe problems (for example, 1.25V for reverse connection fault is higher than 0.62V for overload operation).

[0102] In some possible implementations, the detection method may further include the operation of step S300 as shown in FIG17:

[0103] S300: Outputs an alarm signal based on the indicated voltage.

[0104] For example, as shown in FIG14, the analog-to-digital converter 261 in the control circuit 260 performs analog-to-digital conversion on the indicated voltage, and then the controller 262 determines whether the radio frequency processing device 200 is in a power supply failure state based on the digital signal after analog-to-digital conversion. When it is determined that the power supply failure state is in place, the controller 262 can output a corresponding alarm signal.

[0105] For example, the alarm signal includes a first alarm signal, which indicates that a power supply overload fault has occurred in the radio frequency processing device 200. In the overload power supply state, as shown in Figure 16(c), the first fuse F1 blows and the second fuse F2 turns on. At this time, the first alarm signal is output according to the indicated voltage.

[0106] For example, the alarm signal includes a second alarm signal, which indicates a power supply short-circuit fault in the RF processing device 200. When the DC power supply 300 is reverse-connected to the RF processing device 200, a short circuit occurs due to the short circuit, causing the first fuse F1 and the second fuse F2 to blow. The instantaneous current generated during the short circuit is extremely large, and the current limiter 270B cannot protect the second fuse F2 under the short circuit condition. The second fuse F2 will blow simultaneously with the first fuse F1 (or blow very shortly after the first fuse F1). At this time, under the condition that the first fuse F1 and the second fuse F2 switch from being on to being on, the controller 262 outputs the second alarm signal according to the indicated voltage.

[0107] For example, the alarm signal includes a third alarm signal, which is used to indicate that the radio frequency processing device 200 is in an operating state with a power supply fault. This situation occurs when the radio frequency processing device 200 is re-connected correctly for power supply after the first fuse F1 is blown (or both the first fuse F1 and the second fuse F2 are blown) due to previous reverse connection, or when the radio frequency processing device 200 is re-connected correctly for power supply after the first fuse F1 is blown due to previous overload power supply. When the radio frequency processing channel 210 is powered on and operates, devices such as the power amplifier PA (including the low-noise power amplifier in the receiving channel RX and the radio frequency power amplifier in the transmitting channel TX, etc.) therein will all be powered on and operate. At this time, the controller 262 can output the third alarm signal according to the detection voltage under the condition that the first fuse F1 is blown and devices such as the power amplifier PA are powered on and operating.

[0108] In some examples, when the controller 262 in the control circuit 260 is a reused control device provided in conjunction with the radio frequency processing device 200, the controller 262 can also control devices such as the power amplifier PA to power off and stop operating under the condition that the first fuse F1 is blown and the power amplifier PA is powered on and operating. That is, while outputting the third alarm signal, it also controls the related powered-on devices to power off and stop operating, so as to ensure the operational safety of the radio frequency processing device 200.

[0109] The controller involved in the embodiments of the present application may be a chip. For example, it may be a field programmable gate array (FPGA), may be an application specific integrated circuit (ASIC), may also be a system on chip (SoC), may also be a central processor unit (CPU), may also be a network processor (NP), may also be a digital signal processor (DSP), may also be a micro controller unit (MCU), may also be a programmable logic device (PLD) or other integrated chips.

[0110] It should be understood that, in various embodiments of the present application, the magnitude of the sequence numbers of the above processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and shall not constitute any limitation on the implementation process of the embodiments of the present application.

[0111] Those skilled in the art will recognize that the modules and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0112] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and modules described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0113] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative; for instance, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules or components may be combined or integrated into another device, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or modules may be electrical, mechanical, or other forms.

[0114] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical modules; that is, they may be located on one device or distributed across multiple devices. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0115] In addition, the functional modules in the various embodiments of this application can be integrated into one device, or each module can exist physically separately, or two or more modules can be integrated into one device.

[0116] The communication system in this application embodiment can be a network device that communicates with a terminal device. This network device may include a transmission and reception point (TRP), a base station, a remote radio unit (RRU) or baseband unit (BBU) of a split base station (also referred to as a digital unit (DU)), a relay station, or an access point, etc.

[0117] In addition, a base station can be a base transceiver station (BTS) in a global system for mobile communication (GSM) or code division multiple access (CDMA) network, an NB (Node B) in a wideband code division multiple access (WCDMA) network, an eNB or eNodeB (evolutionary Node B) in LTE, a radio controller in a cloud radio access network (CRAN) scenario, or a base station in a 5G communication system (such as a next-generation Node B (gNodeB, gNB)), or a base station in a future evolved network, etc., without being specifically limited here.

[0118] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented using software programs, implementation can be, in whole or in part, in the form of a computer program product. This computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device containing one or more servers, data centers, etc., that can be integrated with the medium. The available media can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state drives (SSDs)).

[0119] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A radio frequency processing device, characterized in that, The system includes a power conversion circuit, a power amplifier, a detection circuit, a first fuse, and a fuse branch. The power conversion circuit receives voltage from an external power supply through two input interfaces of the radio frequency processing device and supplies it to the power amplifier. One of the input interfaces is positive, and the other is negative. The first fuse is connected between the power conversion circuit and at least one of the two input interfaces, and one of the two input interfaces is also grounded through the first fuse; The safety branch is connected in parallel with the first fuse corresponding to one of the input ports. The safety branch includes a second fuse connected in series and a reverse protection circuit. The second fuse is also grounded through the reverse protection circuit. The detection circuit is used to detect the voltage between the second fuse and the anti-reverse circuit to obtain an indication voltage. The voltage value of the indication voltage is used to indicate the power supply status of the radio frequency processing device.

2. The radio frequency processing device according to claim 1, characterized in that, The radio frequency processing device further includes a control circuit connected to the detection circuit. The control circuit is used to output an alarm signal according to the indicated voltage, and the alarm signal is used to indicate that a power supply failure event has occurred in the radio frequency processing device.

3. The radio frequency processing device according to claim 2, characterized in that, The fuse branch also includes a current limiter, which is connected in series with the second fuse and the anti-reverse circuit. The detection point of the detection circuit is located between the current limiter and the anti-reverse circuit. The alarm signal includes a first alarm signal, which is used to indicate that the radio frequency processing equipment has a power supply overload fault. The step of outputting an alarm signal according to the indicated voltage includes: outputting the first alarm signal according to the indicated voltage when the first fuse blows and the second fuse is turned on.

4. The radio frequency processing device according to claim 3, characterized in that, The fusing current of the second fuse is less than that of the first fuse.

5. The radio frequency processing device according to claim 2, characterized in that, The alarm signal includes a second alarm signal, which is used to indicate that a power supply short circuit fault has occurred in the radio frequency processing device; The step of outputting an alarm signal according to the indicated voltage includes: outputting the second alarm signal according to the indicated voltage when the first fuse and the second fuse switch from being on to being blown.

6. The radio frequency processing apparatus according to any one of claims 2-5, characterized in that, The alarm signal includes a third alarm signal, which is used to indicate that the radio frequency processing device is in a power supply fault operation state; The step of outputting an alarm signal based on the indicated voltage includes: outputting the third alarm signal based on the detected voltage when the first fuse blows and the power amplifier is powered on.

7. The radio frequency processing apparatus according to any one of claims 2-6, characterized in that, The control circuit is also used to: control the power amplifier to power down and stop operating when the first fuse blows and the power amplifier is powered on.

8. The radio frequency processing apparatus according to any one of claims 1-7, characterized in that, The detection circuit includes a voltage divider circuit. The first input terminal of the voltage divider circuit serves as the input terminal of the detection circuit. The second input terminal of the voltage divider circuit is used to input a reference voltage. The output terminal of the voltage divider circuit serves as the output terminal of the detection circuit. The voltage divider circuit is used to obtain the indication voltage based on the detection voltage and the reference voltage.

9. The radio frequency processing device according to claim 8, characterized in that, The detection circuit further includes a reference voltage circuit; the voltage divider circuit includes a first resistor, a second resistor, a third resistor, and a fourth resistor; the reference voltage circuit includes a fifth resistor and a voltage regulator; The first end of the first resistor serves as the first input terminal of the voltage divider circuit. The second end of the first resistor is connected to the first end of the second resistor. The second end of the second resistor serves as the output terminal of the voltage divider circuit. The first end of the third resistor serves as the second input terminal of the voltage divider circuit. The second end of the third resistor and the first end of the fourth resistor are respectively connected between the first resistor and the second resistor. The second end of the fourth resistor is grounded. The first end of the fifth resistor is used to input a reference voltage, and the second end of the fifth resistor is connected to the voltage regulator and serves as the output of the reference voltage circuit to provide the reference voltage to the second input of the voltage divider circuit.

10. The radio frequency processing apparatus according to any one of claims 1-9, characterized in that, The anti-reverse circuit includes a current-limiting diode, the input terminal of which is grounded, and the output terminal of which is connected to the second fuse and the detection circuit.

11. A detection method, characterized in that, Applied to radio frequency processing equipment, the radio frequency processing equipment includes a power conversion circuit, a power amplifier, a detection circuit, a first fuse, and a fuse branch, and the detection method includes: The power conversion circuit receives voltage from an external power supply through two input interfaces of the radio frequency processing device and supplies it to the power amplifier. One of the input interfaces is positive and the other is negative. The fuse branch is connected in parallel with the first fuse corresponding to one of the input ports. The fuse branch includes a second fuse connected in series and a reverse protection circuit. The second fuse is also grounded through the reverse protection circuit. The detection circuit detects the voltage between the second fuse and the anti-reverse circuit to obtain an indication voltage. The voltage value of the indication voltage is used to indicate the power supply status of the radio frequency processing device.

12. The detection method according to claim 11, characterized in that, The detection method further includes: outputting an alarm signal based on the indicated voltage, the alarm signal being used to indicate a power supply failure event in the radio frequency processing device.

13. The detection method according to claim 12, characterized in that, The radio frequency processing device also includes a current limiter connected in series with the second fuse and the anti-reverse circuit. The detection point of the detection circuit is located between the current limiter and the anti-reverse circuit. The alarm signal includes a first alarm signal, which is used to indicate that the radio frequency processing device has a power supply overload fault. The step of outputting an alarm signal according to the indicated voltage includes: outputting the first alarm signal according to the indicated voltage when the first fuse blows and the second fuse is turned on.

14. The detection method according to claim 12, characterized in that, The alarm signal includes a second alarm signal, which is used to indicate that a power supply short circuit fault has occurred in the radio frequency processing device; The step of outputting an alarm signal according to the indicated voltage includes: outputting the second alarm signal according to the indicated voltage when the first fuse and the second fuse switch from being on to being blown.

15. The detection method according to any one of claims 12-14, characterized in that, The detection method further includes: controlling the power amplifier to power down and stop operating when the first fuse blows and the power amplifier is powered on.

16. A communication system, characterized in that, The device includes a DC power supply, a grounding network, and a radio frequency processing device as described in any one of claims 1-10. The two output interfaces of the DC power supply are respectively connected to the two input interfaces of the radio frequency processing device in a one-to-one correspondence. One of the two output interfaces is connected to the grounding network, and one of the two input interfaces is connected to the grounding network. The one output interface and the one input interface are both positive or negative.

17. The communication system according to claim 16, characterized in that, The communication system further includes a baseband processing device, and the radio frequency processing device further includes a control circuit, which is connected to the detection circuit. The control circuit is used to output an alarm signal to the baseband processing device, which indicates that a power supply failure event has occurred in the radio frequency processing device.

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