CN110417485B - Standing-wave ratio detection method and device, computer equipment and readable storage medium - Google Patents
Standing-wave ratio detection method and device, computer equipment and readable storage medium Download PDFInfo
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- CN110417485B CN110417485B CN201910556135.9A CN201910556135A CN110417485B CN 110417485 B CN110417485 B CN 110417485B CN 201910556135 A CN201910556135 A CN 201910556135A CN 110417485 B CN110417485 B CN 110417485B
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Abstract
The application relates to a standing-wave ratio detection method, a standing-wave ratio detection device, computer equipment and a computer readable storage medium, wherein the standing-wave ratio detection method comprises the steps of counting the forward baseband transmission power of a baseband signal and counting the reverse baseband reflection power of the baseband signal after a preset time delay; acquiring the transmitting power of the RRU equipment according to the transmitting power of the forward baseband and the gain of the downlink radio frequency link, and acquiring the reflected power of the RRU equipment according to the reflected power of the reverse baseband and the gain of the downlink feedback link; and calculating the standing-wave ratio of the RRU equipment according to the transmitting power and the reflected power. According to the standing-wave ratio detection method, the forward baseband transmission power is counted firstly, the reverse baseband reflection power is counted after accurate time delay, signals counted by power are ensured to be the same baseband signal, and therefore the detection precision of the standing-wave ratio on the RRU equipment is improved.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for detecting a standing-wave ratio, a computer device, and a computer-readable storage medium.
Background
A Standing Wave Ratio (VSWR) index on a Radio Remote Unit (RRU) indicates a matching condition of a Radio frequency system. When the standing-wave ratio is equal to 1, the high-frequency energy transmitted by the RRU equipment is transmitted and radiated by the antenna feeder; the larger the standing wave ratio, the more energy is reflected back without being transmitted, so the standing wave ratio is an important indicator in RRU devices.
The traditional industry technology is to use a radio frequency detector to count forward power and reverse power on a radio frequency link, and then obtain a standing-wave ratio through public conversion. However, when the detection method is applied to a TDD system or a downlink time domain, discontinuous output is likely to occur, and the detected forward power and the detected reverse power are not signals on the same time slice, that is, non-identical baseband signals, which results in a large deviation of the standing-wave ratio detected by the device in the same environment.
Disclosure of Invention
The application provides a standing-wave ratio detection method which can improve the detection precision of the standing-wave ratio of RRU equipment.
A method of standing-wave ratio detection, the method comprising:
counting the forward baseband transmitting power of a baseband signal, and counting the reverse baseband reflected power of the baseband signal after a preset time delay;
acquiring the transmitting power of RRU equipment according to the transmitting power of the forward baseband and the gain of the downlink radio frequency link, and acquiring the reflected power of the RRU equipment according to the reflected power of the reverse baseband and the gain of the downlink feedback link;
and calculating the standing-wave ratio of the RRU equipment according to the transmitting power and the reflected power.
In an embodiment, before obtaining the transmit power of the RRU device according to the forward transmit power and the gain of the downlink radio frequency link, the method further includes:
counting forward statistical power of a first test signal by transmitting the first test signal;
acquiring the detection power of the first test signal after passing through the downlink radio frequency link;
and obtaining the gain of the downlink radio frequency link according to the forward statistical power and the detection power.
In an embodiment, before obtaining the reflected power of the RRU device according to the reverse baseband reflected power and the gain of the downlink feedback link, the method further includes:
counting the transmission power of a second test signal by transmitting the second test signal;
acquiring reverse statistical power of the second test signal after passing through the downlink feedback link;
and obtaining the gain of the downlink feedback link according to the transmitting power and the reverse statistical power.
In an embodiment, the method further comprises:
and counting the transmission time delay of the baseband signal passing through the downlink radio frequency link and the downlink feedback link, and taking the transmission time delay as the preset time delay.
In an embodiment, the counting the forward baseband transmission power of the baseband signal and counting the backward baseband reflection power of the baseband signal after a predetermined delay includes:
acquiring current system time and preset statistical time;
and counting the forward baseband transmitting power of the baseband signal within preset counting time, and counting the backward baseband reflected power of the baseband signal within the preset counting time after the preset delay of the current system time.
In an embodiment, obtaining the transmit power according to the forward baseband transmit power and the gain of the downlink radio frequency link includes:
obtaining average forward baseband transmitting power according to the forward baseband transmitting power and preset statistical time;
and acquiring the transmitting power of the baseband signal according to the average forward baseband transmitting power and the gain of the downlink radio frequency link.
In one embodiment, determining the reflected power according to the reverse baseband reflected power and the gain of the downlink feedback link includes:
obtaining average reverse baseband transmitting power according to the reverse baseband transmitting power and preset statistical time;
and acquiring the reflected power of the baseband signal according to the average reverse baseband transmitting power and the gain of the downlink feedback link.
A standing-wave ratio detection apparatus, the apparatus comprising:
the statistical module is used for counting the forward baseband transmitting power of the baseband signal and counting the backward baseband reflecting power of the baseband signal after a preset time delay;
an obtaining module, configured to obtain the transmit power of the RRU device according to the forward baseband transmit power and the gain of the downlink radio frequency link, and obtain the reflected power of the RRU device according to the reverse baseband reflected power and the gain of the downlink feedback link;
and the calculating module is used for calculating the standing-wave ratio of the RRU equipment according to the transmitting power and the reflected power.
A computer device comprising a memory storing a computer program and a processor implementing the steps of the above method when executing the computer program.
A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the above-mentioned method.
The standing-wave ratio detection method, the standing-wave ratio detection device, the computer equipment and the computer readable storage medium provided by the embodiment of the application comprise the steps of counting the forward baseband transmission power of a baseband signal, and counting the backward baseband reflection power of the baseband signal after a preset time delay; acquiring the transmitting power of RRU equipment according to the transmitting power of the forward baseband and the gain of the downlink radio frequency link, and acquiring the reflected power of the RRU equipment according to the reflected power of the reverse baseband and the gain of the downlink feedback link; and calculating the standing-wave ratio of the RRU equipment according to the transmitting power and the reflected power. According to the standing-wave ratio detection method, the forward baseband transmission power is counted firstly, the reverse baseband reflection power is counted after accurate time delay, signals counted by power are ensured to be the same baseband signal, and therefore the detection precision of the standing-wave ratio on the RRU equipment is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a downlink channel of an existing RRU device according to an embodiment;
fig. 2 is a schematic structural diagram of a downlink channel of RRU equipment according to another embodiment;
FIG. 3 is a flow chart of a method for providing standing-wave ratio detection according to an embodiment;
fig. 4 is a schematic structural diagram of an RRU device implementing a delay function according to an embodiment;
FIG. 5 is a flow chart diagram of a method for standing-wave ratio detection according to another embodiment;
FIG. 6 is a block diagram showing the structure of a standing-wave ratio detecting apparatus according to an embodiment;
FIG. 7 is a diagram illustrating an internal structure of a computer device according to an embodiment.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth to provide a thorough understanding of the present application, and in the accompanying drawings, preferred embodiments of the present application are set forth. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. This application is capable of embodiments in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. In the description of the present application, "a number" means at least one, such as one, two, etc., unless specifically limited otherwise.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Fig. 1 is a schematic structural diagram of a downlink channel of an RRU device according to an embodiment, where the RRU device separates a baseband signal unit from a transmitting unit, that is, separates the baseband unit from a radio frequency unit of a base station, and the baseband signal unit and the transmitting unit remotely transmit a baseband signal through light or the internet, so that a signal-to-noise ratio can reach an optimal state. As shown in fig. 1, a downlink channel in the RRU device mainly includes a CPU, a Field-Programmable Gate Array (FPGA), and a downlink channel link, which are connected in sequence, where any downlink channel link mainly includes a digital-to-analog converter D/a connected to the FPGA, a downlink radio frequency link, a downlink feedback link, and an analog-to-digital converter a/D connected to the FPGA. The standing-wave ratio detection method provided by the embodiment of the application can flexibly configure parameters, is suitable for most of digital radio frequency devices needing standing-wave ratio detection, and requires hardware technologies in the prior art, so other necessary structures in RRU equipment related to the implementation of the method of the invention are omitted in the embodiment, and further details about the basic working principle of the RRU equipment are omitted.
The FPGA is also provided with a statistical module, the statistical module comprises a forward power statistical module and a reverse power statistical module, and the forward power statistical module is connected with the D/A of the digital-to-analog converter and used for counting the forward baseband transmitting power of the baseband signal; and the reverse power statistic module is connected with the analog-to-digital converter A/D and is used for counting the reverse baseband reflected power of the baseband signals.
The FPGA includes at least one statistical module, and the downlink channel links are connected to the statistical modules in a one-to-one correspondence manner, as shown in fig. 2. Since the hardware techniques required by the present invention are all prior art, other necessary structures in the RRU device related to implementing the method of the present invention are omitted in this embodiment.
Fig. 3 is a flowchart of a standing-wave ratio detection method according to an embodiment, and as shown in fig. 3, the standing-wave ratio detection method includes steps 310 to 330, where:
In an embodiment, transmission delay of the baseband signal through the downlink radio frequency link and the downlink feedback link is counted, and the transmission delay is used as the preset delay.
Specifically, as shown in fig. 4, the downlink rf link is a conventional link in the field, and mainly includes a phase-locked loop, an attenuator, a filter, a gain module, and the like, and the conventional downlink rf link is further sequentially connected to the coupler and the FB feedback circuit, so as to implement a DPD (digital predistortion) function; in addition, the downlink feedback link mainly comprises a phase-locked loop and a filter. In order to achieve the purpose of the present invention, the downlink radio frequency link is further connected with an isolator and an echo reflection circuit to form a standing-wave ratio detection link, the isolator is connected with a duplexer so as to receive a radio frequency reflection signal in a loopback manner, and the specific method is as follows: firstly, keeping the output load of a downlink duplexer in a mismatched state, controlling a channel selection switch to be closed through an FPGA (field programmable gate array) to conduct a downlink radio frequency link, a link between a standing-wave ratio detection link and a downlink feedback link, so that a baseband signal is output from a D/A (digital/analog) to the downlink radio frequency link and then returns to an A/D (analog/digital) through the downlink feedback link, after the A/D is sampled, calculating the transmission delay of the baseband signal by the FPGA, and taking the transmission delay as a preset delay, namely an accurate delay T1. The time delay value is not changed generally, so that the time delay value can be read by the CPU and stored as a fixed parameter after the initial test is acquired, and repeated tests are not needed. In this embodiment, the forward power statistics module in the FPGA may count the forward baseband transmission power of the baseband signal, and the reverse power statistics module in the FPGA may count the reverse baseband reflection power of the baseband signal.
After the statistics starts, the forward power statistics module of the FPGA counts the forward baseband transmission power P1 of the baseband signal. And accurately timing after the start of statistics, reflecting the baseband signal from the D/A output to a downlink feedback link after passing through a downlink radio frequency link, and counting the reverse baseband reflected power P2 of the baseband signal by a reverse power statistics module of the FPGA after the time delay T1.
The forward baseband transmitting power is counted by a forward power counting module in the FPGA, and the reverse baseband reflected power is counted by a reverse power counting module in the FPGA after the accurate delay T1, so that the signals of power statistics can be ensured to be the same baseband signal, and the detection precision of the standing-wave ratio is improved.
In an embodiment, before obtaining the transmit power of the RRU device according to the forward transmit power and the gain of the downlink radio frequency link, the method further includes:
counting forward statistical power of the first test signal by transmitting the first test signal;
acquiring detection power of a first test signal after the first test signal passes through a downlink radio frequency link;
and obtaining the gain of the downlink radio frequency link according to the forward statistical power and the detection power.
Specifically, as shown in fig. 7, the FPGA is controlled to transmit a first test signal, and the RRU downlink radio frequency link is tested by a spectrometer connected to the duplexer, so as to obtain a gain G1 of the downlink radio frequency link. The gain G1 may be obtained by subtracting the forward baseband transmit power of the FPGA statistics from the detected power on the spectrometer.
The present embodiment may adopt a CW test method, which is to test the propagation loss of a continuous wave using the continuous wave as the first test signal. By using continuous wave as a signal source, the propagation loss of the signal is only related to the transmission channel and is not related to the signal, so that the data obtained by testing is more accurate.
In an embodiment, before obtaining the reflected power of the RRU device according to the reverse baseband reflected power and the gain of the downlink feedback link, the method further includes:
counting the transmission power of the second test signal by transmitting the second test signal;
acquiring reverse statistical power of a second test signal after the second test signal passes through a downlink feedback link;
and obtaining the gain of the downlink feedback link according to the transmitting power and the reverse statistical power.
Specifically, the switch is controlled by the FPGA to conduct the echo reflection circuit. And controlling a signal source connected with the echo reflection circuit to transmit a second test signal and obtaining the transmitting power of the second test signal. And the second test signal is transmitted to the FPGA through the downlink reflection link, a reverse power statistical module of the FPGA counts the reverse baseband reflection power of the second test signal, and the reverse baseband reflection power subtracts the transmission power of the signal source to obtain the gain G2 of the downlink feedback link.
After the gain G1 of the downlink radio frequency link and the gain G2 of the downlink feedback link are obtained, the transmission power of the RRU equipment is obtained according to the forward baseband transmission power and the gain G1 of the downlink radio frequency link, and the reflection power of the RRU equipment is obtained according to the reverse baseband reflection power and the gain G2 of the downlink feedback link.
After counting the forward baseband transmitting power P1 and the backward baseband reflecting power P2 of the baseband signal, the FPGA informs the CPU of the reading power values P1 and P2 by generating a trigger signal. And after obtaining the gain G1 of the downlink radio frequency link and the gain G2 of the downlink feedback link, obtaining the transmitting power and the reflected power through conversion. The conversion process is as follows: p1+ G1 is the transmitted power and P2+ G2 is the reflected power. And after the CPU reads the data successfully, the CPU informs the FPGA to carry out the next round of statistics.
And step 330, calculating the standing-wave ratio of the RRU equipment according to the transmitting power and the reflected power. After the transmitting power and the reflected power are obtained, the standing-wave ratio of the RRU equipment is calculated through the following formula.
It should be noted that the standing-wave ratio detection methods provided in the above embodiments are all standing-wave ratio detection processes of one downlink channel link, and if there are multiple downlink channel links, the above steps may be repeated to perform detection respectively.
The standing-wave ratio detection method provided by the embodiment comprises the steps of counting the forward baseband transmission power of a baseband signal, and counting the reverse baseband reflection power of the baseband signal after a preset time delay; acquiring the transmitting power of the RRU equipment according to the transmitting power of the forward baseband and the gain of the downlink radio frequency link, and acquiring the reflected power of the RRU equipment according to the reflected power of the reverse baseband and the gain of the downlink feedback link; and calculating the standing-wave ratio of the RRU equipment according to the transmitting power and the reflected power. According to the standing-wave ratio detection method, the forward baseband transmission power is counted firstly, the reverse baseband reflection power is counted after accurate time delay, signals counted by power are ensured to be the same baseband signal, and therefore the detection precision of the standing-wave ratio on the RRU equipment is improved.
In one embodiment, as shown in fig. 5, counting the forward baseband transmission power of the baseband signal and counting the backward baseband reflection power of the baseband signal after a predetermined delay includes steps 510 and 520, where:
The preset statistical time is matched with the network system of the communication system. The network systems of the communication system include LTE, CDMA, or GSM, etc., and the time slot time for transmitting signals in different network systems is different, so when the network systems change, the preset statistical time needs to be adjusted accordingly.
When the RRU equipment normally works, a forward power statistic module of the FPGA counts forward baseband transmitting power P1 of a baseband signal within preset statistic time to obtain average forward baseband transmitting power, and the transmitting power of the baseband signal is obtained according to the average forward baseband transmitting power and the gain of a downlink radio frequency link.
In one embodiment, determining the reflected power based on the reverse baseband reflected power and the gain of the downlink feedback link comprises: obtaining average reverse baseband transmitting power according to the reverse baseband transmitting power and preset statistical time; and acquiring the reflected power of the baseband signal according to the average reverse baseband transmitting power and the gain of the downlink feedback link.
The baseband signal passes through a reverse feedback link, a reverse power statistic module of the FPGA counts the reverse baseband reflected power within preset statistic time to obtain average reverse baseband reflected power, and the transmitting power of the baseband signal is obtained according to the average reverse baseband reflected power and the gain of a downlink radio frequency link. It should be noted that the statistical time of the average forward baseband transmission power and the average backward baseband reflection power should be consistent. The mode of respectively obtaining the transmitting power and the reflected power through the average forward baseband transmitting power and the average reverse baseband reflected power is more accurate, and the detection error of the standing wave ratio can be reduced. In addition, the preset statistical time can be adjusted according to the network system, so that the detection method can use communication systems of various systems, and the detection method is more universal.
It should be understood that although the steps in the flowcharts of fig. 3 and 5 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 3 and 5 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performing the sub-steps or stages is not necessarily sequential, but may be performed alternately or alternately with other steps or at least some of the sub-steps or stages of other steps.
In one embodiment, as shown in fig. 6, there is provided a standing-wave ratio detecting apparatus including: a statistics module 610, an acquisition module 620, and a calculation module 630, wherein:
the statistic module 610 is configured to count a forward baseband transmission power of the baseband signal, and count a backward baseband reflection power of the baseband signal after a preset time delay.
An obtaining module 620, configured to obtain the transmit power of the RRU device according to the forward baseband transmit power and the gain of the downlink radio frequency link, and obtain the reflected power of the RRU device according to the reverse baseband reflected power and the gain of the downlink feedback link.
And a calculating module 630, configured to calculate a standing-wave ratio of the RRU device according to the transmission power and the reflected power.
In an embodiment, before the obtaining module 620 obtains the transmission power of the RRU device according to the forward transmission power and the gain of the downlink radio frequency link, the standing-wave ratio detection apparatus further counts the forward statistical power of the first test signal by transmitting the first test signal;
acquiring detection power of a first test signal after the first test signal passes through a downlink radio frequency link;
and obtaining the gain of the downlink radio frequency link according to the forward statistical power and the detection power.
In an embodiment, before the obtaining module 620 obtains the reflected power of the RRU device according to the reverse baseband reflected power and the gain of the downlink feedback link, the standing-wave ratio detection apparatus further counts the transmission power of the second test signal by transmitting the second test signal;
acquiring reverse statistical power of a second test signal after the second test signal passes through a downlink feedback link;
and obtaining the gain of the downlink feedback link according to the transmitting power and the reverse statistical power.
In an embodiment, the standing-wave ratio detection apparatus further includes a preset delay determining module, configured to count transmission delays of the baseband signal through the downlink radio frequency link and the downlink feedback link, and use the transmission delay as the preset delay.
In one embodiment, the counting module counts a forward baseband transmission power of the baseband signal, and the counting a backward baseband reflection power of the baseband signal after a predetermined delay includes:
acquiring current system time and preset statistical time;
and counting the forward baseband transmitting power of the baseband signal within preset counting time, and counting the reverse baseband reflected power of the baseband signal within the preset counting time after the preset time delay of the current system time.
In an embodiment, the obtaining module 620 obtains the transmission power of the RRU device according to the forward baseband transmission power and the gain of the downlink radio frequency link, including:
obtaining average forward baseband transmitting power according to the forward baseband transmitting power and preset statistical time;
and acquiring the transmitting power of the baseband signal according to the average forward baseband transmitting power and the gain of the downlink radio frequency link.
In an embodiment, the obtaining module 620 obtains the reflected power of the RRU device according to the reverse baseband reflected power and the gain of the downlink feedback link, including:
obtaining average reverse baseband transmitting power according to the reverse baseband transmitting power and preset statistical time;
and acquiring the reflected power of the baseband signal according to the average reverse baseband transmitting power and the gain of the downlink feedback link.
For specific definition of the standing-wave ratio detection device, reference may be made to the above definition of the standing-wave ratio detection method, which is not described herein again. All or part of each module in the standing-wave ratio detection device can be realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as shown in fig. 7. The computer device includes a processor, a memory, a network interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a standing-wave ratio detection method. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.
Those skilled in the art will appreciate that the architecture shown in fig. 7 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is provided, comprising a memory and a processor, the memory having a computer program stored therein, the processor implementing the following steps when executing the computer program:
counting the forward baseband transmitting power of the baseband signal, and counting the reverse baseband reflected power of the baseband signal after a preset time delay;
acquiring the transmitting power of the RRU equipment according to the transmitting power of the forward baseband and the gain of the downlink radio frequency link, and acquiring the reflected power of the RRU equipment according to the reflected power of the reverse baseband and the gain of the downlink feedback link;
and calculating the standing-wave ratio of the RRU equipment according to the transmitting power and the reflected power.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
counting the forward baseband transmitting power of the baseband signal, and counting the reverse baseband reflected power of the baseband signal after a preset time delay;
acquiring the transmitting power of the RRU equipment according to the transmitting power of the forward baseband and the gain of the downlink radio frequency link, and acquiring the reflected power of the RRU equipment according to the reflected power of the reverse baseband and the gain of the downlink feedback link;
and calculating the standing-wave ratio of the RRU equipment according to the transmitting power and the reflected power.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware related to instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A standing-wave ratio detection method, characterized in that the method comprises:
counting the transmission time delay of a baseband signal through a downlink radio frequency link and a downlink feedback link, and taking the transmission time delay as a preset time delay; counting the forward baseband transmitting power of a baseband signal, and counting the reverse baseband reflected power of the baseband signal after the preset time delay;
acquiring the transmission power of RRU equipment according to the forward baseband transmission power and the gain of the downlink radio frequency link, and acquiring the reflection power of the RRU equipment according to the reverse baseband reflection power and the gain of the downlink feedback link;
and calculating the standing-wave ratio of the RRU equipment according to the transmitting power and the reflected power.
2. The method of claim 1, wherein before the obtaining the transmission power of the RRU device according to the forward transmission power and the gain of the downlink radio frequency link, the method further comprises:
counting forward statistical power of a first test signal by transmitting the first test signal;
acquiring the detection power of the first test signal after passing through the downlink radio frequency link;
and obtaining the gain of the downlink radio frequency link according to the forward statistical power and the detection power.
3. The method of claim 1, wherein before the obtaining the reflected power of the RRU device according to the reverse baseband reflected power and the gain of the downlink feedback link, the method further comprises:
counting the transmission power of a second test signal by transmitting the second test signal;
acquiring reverse statistical power of the second test signal after passing through the downlink feedback link;
and obtaining the gain of the downlink feedback link according to the transmitting power and the reverse statistical power.
4. The method of claim 1, wherein the counting forward baseband transmission power of the baseband signal and counting backward baseband reflection power of the baseband signal after a predetermined delay comprises:
acquiring current system time and preset statistical time;
and counting the forward baseband transmitting power of the baseband signal within preset counting time, and counting the backward baseband reflected power of the baseband signal within the preset counting time after the preset delay of the current system time.
5. The method of claim 4, wherein obtaining the transmission power of the RRU device according to the forward baseband transmission power and the gain of the downlink radio frequency link comprises:
obtaining average forward baseband transmitting power according to the forward baseband transmitting power and preset statistical time;
and acquiring the transmitting power of the baseband signal according to the average forward baseband transmitting power and the gain of the downlink radio frequency link.
6. The method of claim 4, wherein obtaining the reflected power of the RRU device according to the reverse baseband reflected power and the gain of the downlink feedback link comprises:
obtaining average reverse baseband transmitting power according to the reverse baseband transmitting power and preset statistical time;
and acquiring the reflected power of the baseband signal according to the average reverse baseband transmitting power and the gain of the downlink feedback link.
7. A standing-wave ratio detection apparatus, comprising:
the statistical module is used for counting the transmission time delay of the baseband signal passing through the downlink radio frequency link and the downlink feedback link and taking the transmission time delay as a preset time delay; counting the forward baseband transmitting power of a baseband signal, and counting the reverse baseband reflected power of the baseband signal after the preset time delay;
an obtaining module, configured to obtain a transmit power of an RRU device according to the forward baseband transmit power and the gain of the downlink radio frequency link, and obtain a reflected power of the RRU device according to the reverse baseband reflected power and the gain of the downlink feedback link;
and the calculating module is used for calculating the standing-wave ratio of the RRU equipment according to the transmitting power and the reflected power.
8. A computer device comprising a memory and a processor, the memory storing a computer program, wherein the processor implements the steps of the method of any one of claims 1 to 6 when executing the computer program.
9. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 6.
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| CN201910556135.9A CN110417485B (en) | 2019-06-25 | 2019-06-25 | Standing-wave ratio detection method and device, computer equipment and readable storage medium |
| PCT/CN2019/127162 WO2020258777A1 (en) | 2019-06-25 | 2019-12-20 | Standing wave ratio measurement method and apparatus, computer device, and readable storage medium |
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| CN111030760B (en) * | 2019-12-23 | 2022-04-22 | 京信网络系统股份有限公司 | Standing wave detection method and device |
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| CN106571879A (en) * | 2015-10-12 | 2017-04-19 | 中兴通讯股份有限公司 | Power detection method and device |
| JP2019106630A (en) * | 2017-12-12 | 2019-06-27 | 富士通株式会社 | Radio communication device and reflection wave phase control method |
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