CN102457334B - Method and device for detecting standing-wave ratio in global microwave internet access system - Google Patents
Method and device for detecting standing-wave ratio in global microwave internet access system Download PDFInfo
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- CN102457334B CN102457334B CN201010516769.0A CN201010516769A CN102457334B CN 102457334 B CN102457334 B CN 102457334B CN 201010516769 A CN201010516769 A CN 201010516769A CN 102457334 B CN102457334 B CN 102457334B
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Abstract
The invention discloses a method and a device for detecting a standing-wave ratio in a global microwave internet access system. The method comprises the steps that: base band power input by a radio frequency channel and back power output by the radio frequency channel are obtained at the same time; the standing-wave ratio of the radio frequency channel is calculated according to the base band power and the back power; and whether the radio frequency channel goes wrong or not is judged through comparing the standing-wave ratio with the presupposed standard standing-wave ratio. By adopting the method and the device, the problem that in the prior art, the standing-wave ratio cannot be calculated accurately and effectively is solved, and accurate monitoring of the standing-wave ratio is guaranteed.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of worldwide interoperability for microwave, access detection method and the device of standing-wave ratio in (Wimax) system.
Background technology
In radio communication, the impedance mismatch of the impedance mismatch of antenna and feeder line or antenna and sender, high-frequency energy will produce reflection and turn back, and disturbs and converge generation standing wave with the part of advancing.In order to characterize and measure the stationary wave characteristic in antenna system, the situation of forward wave and reflected wave in antenna namely, people have set up " standing-wave ratio " this concept.Radio system impedance matching, will note making voltage standing wave ratio reach certain requirement especially because when broadband operation frequency wide range, standing-wave ratio can become along with frequency, should make impedance coupling as far as possible in wide region.Standing-wave ratio is exactly a numerical value, is used for representing whether antenna and electric wave transmitting station mate.If impedance matching, the electric wave that transmitting is transferred to antenna, without any reflection, is all launched, and this is optimal situation.If impedance mismatch, some electric wave is reflected back, and finally becomes heat, and feeder line is heated up.The electric wave being reflected also can produce quite high voltage at transmitting station delivery outlet, likely damages transmitting station.
In Wimax system, the baseband signal of RRU (remote radio unit (RRU)) is transferred to antenna port place and launches through radio-frequency channel.Due to the whether impact of matching properties of hardware impedance, at antenna port place, some signal is reflected back, and can produce like this two kinds of impacts: 1, the signal power of output RRU has diminished, and has influence on user's access; If it is excessive 2, to be reflected back the signal of RRU, can exert an influence to the device of RRU, may damage device.The ratio of antenna port place reflected signal and forward signal is defined as standing-wave ratio.From definition, can find out, standing-wave ratio characterizes the physical quantity of antenna port place reflected signal relative size, and we always wish that standing-wave ratio is the smaller the better, can not be in fact 0.Standing-wave ratio is an important performance indexes of RRU, need to detect in real time, if standing-wave ratio is excessive, needs alarm, and does further inspection operation.
In the prior art, obtain standing-wave ratio, just need to detect backward power and the forward power of antenna port.As shown in Figure 1, the power at antenna port place is to gather by DPD (digital pre-distortion) loop.Switch when DPD loop is placed on forward power collection point, just can gather the power of forward direction; When DPD circuit switching is placed on backward power collection point, just can gather backward power.In former scheme, be exactly to gather in this way forward power and backward power.It is irrational that this scheme was proved to be afterwards, because will calculate exactly standing-wave ratio, must adopt forward power and the backward power of same frame, WIMAX signal frame is 5ms frame, this just must gather at synchronization forward power and the backward power at antenna port place, and above scheme can not collect forward power and the backward power of synchronization exactly, thereby cannot calculate effective standing-wave ratio.
Visible, in the prior art, owing to cannot calculating correct effectively standing-wave ratio, thereby may cause the damage to ballistic device.
Summary of the invention
For calculating the problem of correct effectively standing-wave ratio in prior art, propose the present invention, for this reason, main purpose of the present invention is to provide a kind of detection method and device of standing-wave ratio in global microwave internet access system, one of to address the above problem at least.
To achieve these goals, according to an aspect of the present invention, provide a kind of detection method of standing-wave ratio in global microwave internet access system, it comprises: under synchronization, obtain the base band power of radio-frequency channel input and the backward power of output; By above-mentioned base band power and above-mentioned backward power, calculate the standing-wave ratio of above-mentioned radio-frequency channel; By more above-mentioned standing-wave ratio and default standard standing wave, recently judge whether above-mentioned radio-frequency channel occurs extremely.
Further, the above-mentioned step of obtaining the base band power of radio-frequency channel input and the backward power of output comprises: the signal of the backward power of the signal of the base band power of above-mentioned input and above-mentioned output is carried out to N time continuous sampling simultaneously, wherein, N >=4, every double sampling interval greater than the time difference between the signal of above-mentioned base band power and the signal of the backward power of above-mentioned output; If the double data that obtain of sampling are identical in above-mentioned N sampling, the base band power using the base band power of once sampling in resulting data in above-mentioned double sampling as obtained radio-frequency channel input, and the backward power using the above-mentioned backward power of once sampling in resulting data in above-mentioned double sampling as obtained radio-frequency channel output.
Further, the length that is less than or equal to M Frame total time of above-mentioned N sampling, M >=2.
Further, above-mentioned radio-frequency channel comprise following one of at least: send the radio-frequency channel of user data signal, the radio-frequency channel of pilot signal transmitted.
Further, the step that calculates the standing-wave ratio of above-mentioned radio-frequency channel by above-mentioned base band power and above-mentioned backward power comprises: R=P
re÷ (P
base* P
ch), wherein, R is above-mentioned standing-wave ratio, P
refor above-mentioned backward power, P
basefor above-mentioned base band power, P
chfor the channel gain obtaining in advance.
Further, by more above-mentioned standing-wave ratio and default standard standing wave, recently judge whether above-mentioned radio-frequency channel occurs that abnormal step comprises: above-mentioned standing-wave ratio and above-mentioned default standard standing-wave ratio are compared; If the absolute value of the difference between above-mentioned standing-wave ratio and above-mentioned default standard standing-wave ratio is greater than predetermined threshold value, judges above-mentioned radio-frequency channel and occur abnormal; Otherwise, judge above-mentioned radio-frequency channel normal.
To achieve these goals, according to a further aspect in the invention, the checkout gear that a kind of standing-wave ratio in global microwave internet access system is provided, it comprises: acquiring unit, for obtain the base band power of radio-frequency channel input and the backward power of output under synchronization; Computing unit, for calculating the standing-wave ratio of above-mentioned radio-frequency channel by above-mentioned base band power and above-mentioned backward power; Judging unit, for recently judging by more above-mentioned standing-wave ratio and default standard standing wave whether above-mentioned radio-frequency channel occurs extremely.
Further, above-mentioned acquiring unit comprises: sampling module, for the signal of the backward power of the signal of the base band power of above-mentioned input and above-mentioned output is carried out to N time continuous sampling simultaneously, wherein, N >=4, every double sampling interval greater than the time difference between the signal of above-mentioned base band power and the signal of the backward power of above-mentioned output; Module is set, for when the double data that obtain of sampling of sampling for above-mentioned N time are identical, base band power using the base band power of once sampling in resulting data in above-mentioned double sampling as obtained radio-frequency channel input, and the backward power using the above-mentioned backward power of once sampling in resulting data in above-mentioned double sampling as obtained radio-frequency channel output.
Further, above-mentioned computing unit comprises: computing module, and for calculate the standing-wave ratio of above-mentioned radio-frequency channel, R=P by following formula
re÷ (P
base* P
ch), wherein, R is above-mentioned standing-wave ratio, P
refor above-mentioned backward power, P
basefor above-mentioned base band power, P
chfor the channel gain obtaining in advance.
Further, above-mentioned judging unit comprises: comparison module, for above-mentioned standing-wave ratio and above-mentioned default standard standing-wave ratio are compared; Judge module, while being greater than predetermined threshold value for the absolute value of the difference between above-mentioned standing-wave ratio and above-mentioned default standard standing-wave ratio, judging above-mentioned radio-frequency channel and occurs abnormal; When the absolute value of the difference between above-mentioned standing-wave ratio and above-mentioned default standard standing-wave ratio is less than or equal to above-mentioned predetermined threshold value, judge above-mentioned radio-frequency channel normal.
In the present invention; by obtain the base band power of radio-frequency channel input and the backward power of output under synchronization; guaranteed the validity of the parameter that calculating standing-wave ratio is used; thereby solved and in prior art, cannot calculate the correct effectively problem of standing-wave ratio; and then guaranteed the correct monitoring to standing-wave ratio, to take appropriate measures to protect transmitter when standing-wave ratio is abnormal.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, or understand by implementing the present invention.Object of the present invention and other advantages can be realized and be obtained by specifically noted structure in the specification write, claims and accompanying drawing.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is according to the schematic diagram of the checkout gear of the standing-wave ratio of correlation technique;
Fig. 2 is a kind of preferred flow chart according to the detection method of the standing-wave ratio in global microwave internet access system of the embodiment of the present invention;
Fig. 3 is a kind of preferred structure chart according to the checkout gear of the standing-wave ratio of the embodiment of the present invention;
Fig. 4 is according to the preferred flow chart of the another kind of the detection method of the standing-wave ratio in global microwave internet access system of the embodiment of the present invention;
Fig. 5 is according to the preferred structure chart of the another kind of the checkout gear of the standing-wave ratio of the embodiment of the present invention.
Embodiment
Hereinafter with reference to accompanying drawing, also describe the present invention in detail in conjunction with the embodiments.It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the application can combine mutually.
Embodiment 1
Fig. 2 is a kind of preferred flow chart according to the detection method of the standing-wave ratio in global microwave internet access system of the embodiment of the present invention, and it comprises the steps:
S202 obtains the base band power of radio-frequency channel input and the backward power of output under synchronization;
S204, calculates the standing-wave ratio of described radio-frequency channel by described base band power and described backward power;
S206, recently judges by more described standing-wave ratio and default standard standing wave whether described radio-frequency channel occurs extremely.
In this preferred embodiment; by obtain the base band power of radio-frequency channel input and the backward power of output under synchronization; guaranteed the validity of the parameter that calculating standing-wave ratio is used; thereby solved and in prior art, cannot calculate the correct effectively problem of standing-wave ratio; and then guaranteed the correct monitoring to standing-wave ratio, to take appropriate measures to protect transmitter when standing-wave ratio is abnormal.
Preferably, the described step of obtaining the base band power of radio-frequency channel input and the backward power of output comprises: the signal of the backward power of the signal of the base band power of described input and described output is carried out to N time continuous sampling simultaneously, wherein, N >=4, every double sampling interval greater than the time difference between the signal of described base band power and the signal of the backward power of described output; If the double data that obtain of sampling are identical in described N sampling, the base band power using the base band power of once sampling in resulting data in described double sampling as obtained radio-frequency channel input, and the backward power using the backward power of once sampling in resulting data in described double sampling as obtained radio-frequency channel output.In this preferred embodiment, by the inferior sample mode of N continuous, can guarantee that the backward power and the base band power that gather are the power of same frame (synchronization), thereby can accurately obtain the standing-wave ratio of radio-frequency channel.Especially, when N=4, can, when accurately obtaining the standing-wave ratio of radio-frequency channel, simplify sampling process and subsequent processes, and save the sampling time.
Preferably, the length that is less than or equal to M Frame total time of described N sampling, M >=2.In this preferred embodiment, by the total time of N sampling is set, can effectively improve sampling efficiency, save the sampling time.Especially, work as M=2, can, when accurately obtaining the standing-wave ratio of radio-frequency channel, simplify sampling process and subsequent processes, and save the sampling time.
Preferably, described radio-frequency channel comprise following one of at least: send the radio-frequency channel of user data signal, the radio-frequency channel of pilot signal transmitted.By this preferred embodiment, can realize the monitoring of the radio-frequency channel without Preamble signal and data-signal being carried out to standing-wave ratio.
Preferably, the step that calculates the standing-wave ratio of described radio-frequency channel by described base band power and described backward power comprises: R=P
re÷ (P
base* P
ch), wherein, R is described standing-wave ratio, P
refor described backward power, P
basefor described base band power, P
chfor the channel gain obtaining in advance.By this preferred embodiment, can realize the calculating to the standing-wave ratio of radio-frequency channel.
Preferably, by more described standing-wave ratio and default standard standing wave, recently judge whether described radio-frequency channel occurs that abnormal step comprises: described standing-wave ratio and described default standard standing-wave ratio are compared; If the absolute value of the difference between described standing-wave ratio and described default standard standing-wave ratio is greater than predetermined threshold value, judges described radio-frequency channel and occur abnormal; Otherwise, judge described radio-frequency channel normal.By this preferred embodiment, can effectively detect radio-frequency channel and whether occur extremely.
Embodiment 2
Fig. 3 is a kind of preferred structure chart according to the checkout gear of the standing-wave ratio of the embodiment of the present invention, it comprises: radio frequency is controlled veneer (TRX) 302, power amplifier (PA) 304, rf filtering transmitter unit (RFE) 306 and digital pre-distortion system (DPD) 308, wherein, DPD system 308 is for gathering base band power and backward power.
In order to detect standing-wave ratio, in antenna end, only the signal of backward power is input in DPD system, at the other end, only the signal of base band power is input in DPD system.Each passage has two DPD loops like this, detects regularly respectively base band power and backward power, rather than as shown in Figure 1 by forward power and backward power alternative expression be input in DPD system.Visible, in a preferred embodiment of the invention, hardware unit is simpler than prior art, has reduced hardware cost.
The gain of radio-frequency channel is fixed, and is known.As long as can detect base band power, so just can calculate forward power, forward power=base band power * channel gain.After detecting base band power, utilize formula above to calculate forward power, and by DPD loop, detect the backward power at antenna port place, so just obtained the standing-wave ratio=backward power ÷ (base band power * channel gain) of this passage.The backward power detecting by this method and base band power can guarantee it is same frame, so also just obtained accurate standing wave ratio.Therefore, by the standing wave ratio of monitoring radio-frequency channel, can reach the object of the whole radio-frequency channel of monitoring performance.
Fig. 4 is that it comprises the steps: according to the preferred flow chart of the another kind of the detection method of the standing-wave ratio in global microwave internet access system of the embodiment of the present invention
S402, RRU cycle detection base band power and antenna port backward power;
S404, RRU calculates the forward power of antenna port according to the following formula of formula: forward power=base band power * channel gain, wherein, channel gain is known fixed value;
S406, the backward power of detection antenna port;
S408, according to the forward power obtaining and backward power, calculates the standing-wave ratio of radio-frequency channel by above-mentioned formula;
S410, judges that described standing-wave ratio whether in rational scope, for example, compares the standing-wave ratio calculating with default standard standing-wave ratio.For example, if standing-wave ratio exceeds normal range (NR) (, the absolute value of the difference between the standing-wave ratio calculating and default standard standing wave is greater than predetermined threshold value), go to step S412; Otherwise, go to S402, continue to detect;
S412, report and alarm explanation channel abnormal.Preferably, return to S402, continue to detect.
Preferably, the described step of obtaining the base band power of radio-frequency channel input and the backward power of output comprises: the signal of the backward power of the signal of the base band power of described input and described output is carried out to N time continuous sampling simultaneously, wherein, N >=4, every double sampling interval greater than the time difference between the signal of described base band power and the signal of the backward power of described output; If the double data that obtain of sampling are identical in described N sampling, the base band power using the base band power of once sampling in resulting data in described double sampling as obtained radio-frequency channel input, and the backward power using the backward power of once sampling in resulting data in described double sampling as obtained radio-frequency channel output.In this preferred embodiment, by the inferior sample mode of N continuous, can guarantee that the backward power and the base band power that gather are the power of same frame (synchronization), thereby can accurately obtain the standing-wave ratio of radio-frequency channel.Especially, when N=4, can, when accurately obtaining the standing-wave ratio of radio-frequency channel, simplify sampling process and subsequent processes, and save the sampling time.
Preferably, the length that is less than or equal to M Frame total time of described N sampling, M >=2.In this preferred embodiment, by the total time of N sampling is set, can effectively improve sampling efficiency, save the sampling time.Especially, work as M=2, can, when accurately obtaining the standing-wave ratio of radio-frequency channel, simplify sampling process and subsequent processes, and save the sampling time.
Embodiment 3
Fig. 5 is that it comprises according to the preferred structure chart of the another kind of the checkout gear of the standing-wave ratio of the embodiment of the present invention: acquiring unit 502, for obtain the base band power of radio-frequency channel input and the backward power of output under synchronization; Computing unit 504, for calculating the standing-wave ratio of described radio-frequency channel by described base band power and described backward power; Judging unit 506, for recently judging by more described standing-wave ratio and default standard standing wave whether described radio-frequency channel occurs extremely.
In this preferred embodiment; by obtain the base band power of radio-frequency channel input and the backward power of output under synchronization; guaranteed the validity of the parameter that calculating standing-wave ratio is used; thereby solved and in prior art, cannot calculate the correct effectively problem of standing-wave ratio; and then guaranteed the correct monitoring to standing-wave ratio, to take appropriate measures to protect transmitter when standing-wave ratio is abnormal.
Preferably, described acquiring unit 502 comprises: sampling module, for the signal of the backward power of the signal of the base band power of described input and described output is carried out to N time continuous sampling simultaneously, wherein, N >=4, every double sampling interval greater than the time difference between the signal of described base band power and the signal of the backward power of described output; Module is set, for when the double data that obtain of sampling of sampling for described N time are identical, base band power using the base band power of once sampling in resulting data in described double sampling as obtained radio-frequency channel input, and the backward power using the backward power of once sampling in resulting data in described double sampling as obtained radio-frequency channel output.In this preferred embodiment, by the inferior sample mode of N continuous, can guarantee that the backward power and the base band power that gather are the power of same frame (synchronization), thereby can accurately obtain the standing-wave ratio of radio-frequency channel.Especially, when N=4, can, when accurately obtaining the standing-wave ratio of radio-frequency channel, simplify sampling process and subsequent processes, and save the sampling time.
Preferably, the length that is less than or equal to M Frame total time of described N sampling, M >=2.In this preferred embodiment, by the total time of N sampling is set, can effectively improve sampling efficiency, save the sampling time.
Preferably, described radio-frequency channel comprise following one of at least: send the radio-frequency channel of user data signal, the radio-frequency channel of pilot signal transmitted.By this preferred embodiment, can realize the monitoring of the radio-frequency channel without Preamble signal and data-signal being carried out to standing-wave ratio.
Preferably, described computing unit 504 comprises: computing module, and for calculate the standing-wave ratio of described radio-frequency channel by following formula,
R＝P
re÷(P
base×P
ch)
Wherein, R is described standing-wave ratio, P
refor described backward power, P
basefor described base band power, P
chfor the channel gain obtaining in advance.By this preferred embodiment, can realize the calculating to the standing-wave ratio of radio-frequency channel.
Preferably, described judging unit 506 comprises: comparison module, for described standing-wave ratio and described default standard standing-wave ratio are compared; Judge module, while being greater than predetermined threshold value for the absolute value of the difference between described standing-wave ratio and described default standard standing-wave ratio, judging described radio-frequency channel and occurs abnormal; When the absolute value of the difference between described standing-wave ratio and described default standard standing-wave ratio is less than or equal to described predetermined threshold value, judge described radio-frequency channel normal.By this preferred embodiment, can effectively detect radio-frequency channel and whether occur extremely.
It should be noted that, in the step shown in the flow chart of accompanying drawing, can in the computer system such as one group of computer executable instructions, carry out, and, although there is shown logical order in flow process, but in some cases, can carry out shown or described step with the order being different from herein.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, or they are made into respectively to each integrated circuit modules, or a plurality of modules in them or step are made into single integrated circuit module to be realized.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. a detection method for standing-wave ratio in global microwave internet access system, is characterized in that, comprising:
Under synchronization, obtain the base band power of radio-frequency channel input and the backward power of output;
By described base band power and described backward power, calculate the standing-wave ratio of described radio-frequency channel;
By more described standing-wave ratio and default standard standing wave, recently judge whether described radio-frequency channel occurs extremely;
The described step of obtaining the base band power of radio-frequency channel input and the backward power of output comprises:
The signal of the backward power of the signal of the base band power of described input and described output is carried out to N time continuous sampling simultaneously, wherein, N >=4, every double sampling interval greater than the time difference between the signal of described base band power and the signal of the backward power of described output;
If the double data that obtain of sampling are identical in described N sampling, the base band power using the base band power of once sampling in resulting data in described double sampling as obtained radio-frequency channel input, and the backward power using the described backward power of once sampling in resulting data in described double sampling as obtained radio-frequency channel output;
Wherein, the length that is less than or equal to M Frame total time of described N sampling, M >=2.
2. method according to claim 1, is characterized in that, described radio-frequency channel comprise following one of at least: send the radio-frequency channel of user data signal, the radio-frequency channel of pilot signal transmitted.
3. method according to claim 1, is characterized in that, the step that calculates the standing-wave ratio of described radio-frequency channel by described base band power and described backward power comprises:
R＝P
re÷(P
base×P
ch)
Wherein, R is described standing-wave ratio, P
refor described backward power, P
basefor described base band power, P
chfor the channel gain obtaining in advance.
4. method according to claim 1, is characterized in that, by more described standing-wave ratio and default standard standing wave, recently judges whether described radio-frequency channel occurs that abnormal step comprises:
Described standing-wave ratio and described default standard standing-wave ratio are compared;
If the absolute value of the difference between described standing-wave ratio and described default standard standing-wave ratio is greater than predetermined threshold value, judges described radio-frequency channel and occur abnormal; Otherwise, judge described radio-frequency channel normal.
5. a checkout gear for standing-wave ratio in global microwave internet access system, is characterized in that, comprising:
Acquiring unit, for obtaining the base band power of radio-frequency channel input and the backward power of output under synchronization;
Computing unit, for calculating the standing-wave ratio of described radio-frequency channel by described base band power and described backward power;
Judging unit, for recently judging by more described standing-wave ratio and default standard standing wave whether described radio-frequency channel occurs extremely;
Wherein, described acquiring unit comprises:
Sampling module, for the signal of the backward power of the signal of the base band power of described input and described output is carried out to N time continuous sampling simultaneously, wherein, N >=4, every double sampling interval greater than the time difference between the signal of described base band power and the signal of the backward power of described output;
Module is set, for when the double data that obtain of sampling of sampling for described N time are identical, base band power using the base band power of once sampling in resulting data in described double sampling as obtained radio-frequency channel input, and the backward power using the described backward power of once sampling in resulting data in described double sampling as obtained radio-frequency channel output;
Wherein, the length that is less than or equal to M Frame total time of described N sampling, M >=2.
6. device according to claim 5, is characterized in that, described computing unit comprises:
Computing module, for calculate the standing-wave ratio of described radio-frequency channel by following formula,
R＝P
re÷(P
base×P
ch)
Wherein, R is described standing-wave ratio, P
refor described backward power, P
basefor described base band power, P
chfor the channel gain obtaining in advance.
7. device according to claim 5, is characterized in that, described judging unit comprises:
Comparison module, for comparing described standing-wave ratio and described default standard standing-wave ratio;
Judge module, while being greater than predetermined threshold value for the absolute value of the difference between described standing-wave ratio and described default standard standing-wave ratio, judging described radio-frequency channel and occurs abnormal; When the absolute value of the difference between described standing-wave ratio and described default standard standing-wave ratio is less than or equal to described predetermined threshold value, judge described radio-frequency channel normal.
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| CN110417485B (en) * | 2019-06-25 | 2020-12-15 | 三维通信股份有限公司 | Standing-wave ratio detection method and device, computer equipment and readable storage medium |
| CN112235014B (en) * | 2020-10-13 | 2022-05-17 | Oppo广东移动通信有限公司 | Radio frequency circuit adjusting method and device, electronic equipment and storage medium |
| CN113595661B (en) * | 2021-06-22 | 2023-06-06 | 三维通信股份有限公司 | No-load detection method, device and system for radio frequency port and electronic device |
| CN115580243B (en) * | 2022-10-09 | 2023-08-18 | 中国电子科技集团公司第七研究所 | Standing wave ratio protection method capable of scanning and correcting threshold line in real time and power amplifier module |
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| WO2004098045A1 (en) * | 2003-04-30 | 2004-11-11 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and device for power amplifier with high accuracy of an output signal |
| CN101557601A (en) * | 2009-05-07 | 2009-10-14 | 上海华为技术有限公司 | Method for detecting standing wave, standing wave detection device and base station |
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| WO2004098045A1 (en) * | 2003-04-30 | 2004-11-11 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and device for power amplifier with high accuracy of an output signal |
| CN101557601A (en) * | 2009-05-07 | 2009-10-14 | 上海华为技术有限公司 | Method for detecting standing wave, standing wave detection device and base station |
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