CN114007259A - Gain compensation method of active antenna - Google Patents
Gain compensation method of active antenna Download PDFInfo
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- CN114007259A CN114007259A CN202111152069.2A CN202111152069A CN114007259A CN 114007259 A CN114007259 A CN 114007259A CN 202111152069 A CN202111152069 A CN 202111152069A CN 114007259 A CN114007259 A CN 114007259A
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- radio frequency
- frequency attenuator
- rainfall
- attenuation value
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000012545 processing Methods 0.000 claims abstract description 20
- 238000011897 real-time detection Methods 0.000 claims abstract description 10
- 230000008054 signal transmission Effects 0.000 abstract description 3
- 238000004891 communication Methods 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/52—TPC using AGC [Automatic Gain Control] circuits or amplifiers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
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Abstract
The invention discloses a gain compensation method of an active antenna, which comprises an uplink and a downlink which are used for communicating an antenna array and a radio frequency coaxial connector; setting the attenuation value of a first radio frequency attenuator in an uplink to be a first preset value, and setting the attenuation value of a second radio frequency attenuator in a downlink to be a second preset value; the rain real-time detection system transmits the detected rainfall level information to the central processing unit; the central processing unit controls real-time attenuation values of the first radio frequency attenuator and the second radio frequency attenuator corresponding to the rainfall level to be a third attenuation value and a fourth attenuation value according to the rainfall level information and a preset compensation rule, and the first radio frequency attenuator and the second radio frequency attenuator output signals according to the third attenuation value and the fourth attenuation value respectively; the problem of during the rainfall, signal transmission ability is poor is solved.
Description
Technical Field
The invention belongs to the field of communication, and particularly relates to a gain compensation method of an active antenna.
Background
As communication technology develops, active antennas are widely used. The active antenna integrates radio frequency into the antenna closely, loss of a feeder line is avoided, power consumption is lower under the condition that the same output power is guaranteed, the radio frequency part of the base station is arranged on the tower to dissipate heat naturally, the use of an air conditioner in a machine room can be greatly reduced, the energy consumption of a mobile network is effectively reduced, and meanwhile, the active antenna is simple and good in appearance and good in visual effect. Meanwhile, with the development of active antennas, users also put higher demands on signal performance, and people find that signals are poor and even normal use is affected when raining, particularly heavy rain or heavy rain.
Disclosure of Invention
The invention aims to provide a gain compensation method of an active antenna, which solves the problem of poor signal transmission capability in a rainfall period.
The invention discloses a gain compensation method of an active antenna, which is characterized in that the active antenna comprises an uplink and a downlink which are communicated with an antenna array and a radio frequency coaxial connector; the uplink comprises a first radio frequency switch connected with the antenna array, a low noise amplifier connected with a receiving end of the first radio frequency switch, a first radio frequency attenuator connected with an output end of the low noise amplifier and a second radio frequency switch connected with an output end of the first radio frequency attenuator in sequence; the downlink comprises a second radio frequency attenuator connected with the receiving end of a second radio frequency switch and a power amplifier connected with the output end of the second radio frequency attenuator, and the power amplifier is connected with the transmitting end of the first radio frequency switch;
the control end of the first radio frequency attenuator and the control end of the second radio frequency attenuator are both connected with a central processing unit, a rainwater real-time detection system is connected onto the central processing unit, and the rainwater real-time detection system detects rainfall in real time and sends rainfall information to the central processing unit;
the gain compensation method comprises the following steps:
in the central processing unit: setting the attenuation value of a first radio frequency attenuator in an uplink to be a first preset value, and setting the attenuation value of a second radio frequency attenuator in a downlink to be a second preset value;
the rain real-time detection system transmits the detected rainfall level information to the central processing unit;
and the central processing unit controls real-time attenuation values of the first radio frequency attenuator and the second radio frequency attenuator corresponding to the rainfall level to be a third attenuation value and a fourth attenuation value according to the rainfall level information and a preset compensation rule, and the first radio frequency attenuator and the second radio frequency attenuator output signals according to the third attenuation value and the fourth attenuation value respectively.
Preferably, the rainfall grades sequentially comprise whether rain exists, light rain, medium rain, heavy rain and extra heavy rain; the rainfall level is an instantaneous rainfall level, and judgment is carried out according to instantaneous rainfall.
Preferably, the third attenuation value is not greater than a first preset value, and the fourth attenuation value is not greater than a second preset value.
The gain compensation method of the active antenna in the technical scheme of the invention has the beneficial effects that: the problems that in the prior art, the signal intensity is reduced and the signal transmission is unstable due to the fact that an active antenna is interfered by rainfall in wireless communication are solved, and normal communication is guaranteed.
Drawings
Fig. 1 is a schematic view of an active antenna structure according to the present invention.
Detailed Description
In order to facilitate the understanding of the technical solutions of the present invention for those skilled in the art, the technical solutions of the present invention will be further described with reference to the drawings attached to the specification.
The research shows that: attenuation of electromagnetic waves by rain in the atmosphere is generally divided into absorption attenuation and scattering attenuation. The absorption attenuation is due to the dielectric loss of raindrops and mainly shows as heat loss, and the scattering attenuation is due to the continuous and irregular scattering of electromagnetic waves in dense raindrops, so that the energy is reduced in the original direction. According to the current mainstream test results, the absorption attenuation of raindrops is larger than the scattering attenuation, and when the size of raindrops is close to the wavelength of electromagnetic waves, the attenuation caused by resonance reaches a peak value. The size of the raindrops is related to the amount of rainfall per unit time, and therefore, in consideration of the rain decay, the amount of rainfall needs to be considered. Generally, the amount of rainfall is classified into no rain, light rain, medium rain, heavy rain, and extra heavy rain.
In the past, because the used frequency is low, the influence of rain attenuation on communication is not large generally, but when a 5G system is introduced and a wireless communication system is developed in the future, a higher transmission rate is needed, and a higher frequency band is used to reach a millimeter wave frequency band. According to research, the higher the signal frequency, the more influenced by rainfall.
Based on the above findings, the following gain compensation method for an active antenna is proposed to solve the problem that the active antenna is affected by rainfall in the prior art.
The invention discloses a gain compensation method of an active antenna, which adopts the technical scheme that the active antenna comprises an uplink and a downlink which are communicated with an antenna array and a radio frequency coaxial connector. The uplink comprises a first radio frequency switch connected with the antenna array, a low noise amplifier connected with a receiving end of the first radio frequency switch, a first radio frequency attenuator connected with an output end of the low noise amplifier and a second radio frequency switch connected with an output end of the first radio frequency attenuator in sequence. The downlink comprises a second radio frequency attenuator connected with the receiving end of the second radio frequency switch and a power amplifier connected with the output end of the second radio frequency attenuator, and the power amplifier is connected with the transmitting end of the first radio frequency switch.
The control end of the first radio frequency attenuator and the control end of the second radio frequency attenuator are both connected with a central processing unit, the central processing unit is connected with a rainwater real-time detection system, and the rainwater real-time detection system detects rainfall in real time and sends the rainfall information to the central processing unit.
The gain compensation method comprises the following steps:
in the central processing unit: and setting the attenuation value of a first radio frequency attenuator in an uplink to be a first preset value, and setting the attenuation value of a second radio frequency attenuator in a downlink to be a second preset value.
And the rain real-time detection system transmits the detected rainfall level information to the central processing unit.
And the central processing unit controls real-time attenuation values of the first radio frequency attenuator and the second radio frequency attenuator corresponding to the rainfall level to be a third attenuation value and a fourth attenuation value according to the rainfall level information and a preset compensation rule, and the first radio frequency attenuator and the second radio frequency attenuator output signals according to the third attenuation value and the fourth attenuation value respectively.
In the scheme, the first preset value and the second preset value are maximum attenuation values of the first radio frequency attenuator and the second radio frequency attenuator respectively in normal weather. Here, the first preset value and the second preset value are both set to 15 dB.
The third attenuation value is not larger than a first preset value, and the fourth attenuation value is not larger than a second preset value.
The rainfall grades sequentially comprise whether rain exists, light rain, medium rain, heavy rain and extra heavy rain; the rainfall level is an instantaneous rainfall level, and judgment is carried out according to instantaneous rainfall.
Third attenuation values corresponding to the rainfall levels of no rain, light rain, medium rain, heavy rain and extra heavy rain are respectively 15dB, 14.5dB, 14dB, 13.5dB, 13dB and 12 dB. Fourth attenuation values corresponding to the rainfall levels of no rain, light rain, medium rain, heavy rain and extra heavy rain are respectively 15dB, 14.5dB, 14dB, 13.5dB, 13dB and 12 dB.
Technical solution of the invention is described above with reference to the accompanying drawings, it is obvious that the specific implementation of the invention is not limited by the above-mentioned manner, and it is within the scope of the invention to adopt various insubstantial modifications of the inventive method concept and technical solution, or to apply the inventive concept and technical solution to other occasions without modification.
Claims (3)
1. A method of gain compensation for an active antenna, the active antenna comprising an uplink and a downlink communicating an antenna element with a radio frequency coaxial connector; the uplink comprises a first radio frequency switch connected with the antenna array, a low noise amplifier connected with a receiving end of the first radio frequency switch, a first radio frequency attenuator connected with an output end of the low noise amplifier and a second radio frequency switch connected with an output end of the first radio frequency attenuator in sequence; the downlink comprises a second radio frequency attenuator connected with the receiving end of a second radio frequency switch and a power amplifier connected with the output end of the second radio frequency attenuator, and the power amplifier is connected with the transmitting end of the first radio frequency switch;
the control end of the first radio frequency attenuator and the control end of the second radio frequency attenuator are both connected with a central processing unit, a rainwater real-time detection system is connected onto the central processing unit, and the rainwater real-time detection system detects rainfall in real time and sends rainfall information to the central processing unit;
the gain compensation method comprises the following steps:
in the central processing unit: setting the attenuation value of a first radio frequency attenuator in an uplink to be a first preset value, and setting the attenuation value of a second radio frequency attenuator in a downlink to be a second preset value;
the rain real-time detection system transmits the detected rainfall level information to the central processing unit;
and the central processing unit controls real-time attenuation values of the first radio frequency attenuator and the second radio frequency attenuator corresponding to the rainfall level to be a third attenuation value and a fourth attenuation value according to the rainfall level information and a preset compensation rule, and the first radio frequency attenuator and the second radio frequency attenuator output signals according to the third attenuation value and the fourth attenuation value respectively.
2. The gain compensation method for an active antenna according to claim 1, wherein the rainfall levels sequentially include presence or absence of rain, light rain, medium rain, heavy rain, and extra heavy rain; the rainfall level is an instantaneous rainfall level, and judgment is carried out according to instantaneous rainfall.
3. The method of claim 1, wherein the third attenuation value is not greater than a first predetermined value, and wherein the fourth attenuation value is not greater than a second predetermined value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111152069.2A CN114007259A (en) | 2021-09-29 | 2021-09-29 | Gain compensation method of active antenna |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111152069.2A CN114007259A (en) | 2021-09-29 | 2021-09-29 | Gain compensation method of active antenna |
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| CN114007259A true CN114007259A (en) | 2022-02-01 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105224002A (en) * | 2014-06-30 | 2016-01-06 | 展讯通信（上海）有限公司 | Radio system temperature compensation, device and mobile terminal |
| CN109347509A (en) * | 2018-11-01 | 2019-02-15 | 广州杰赛科技股份有限公司 | A kind of gain compensating method of active antenna, device and active antenna |
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2021
- 2021-09-29 CN CN202111152069.2A patent/CN114007259A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105224002A (en) * | 2014-06-30 | 2016-01-06 | 展讯通信（上海）有限公司 | Radio system temperature compensation, device and mobile terminal |
| CN109347509A (en) * | 2018-11-01 | 2019-02-15 | 广州杰赛科技股份有限公司 | A kind of gain compensating method of active antenna, device and active antenna |
Non-Patent Citations (1)
| Title |
|---|
| 张楹等: "无线通信基站雨衰检测及补偿方法", 《电信工程技术与标准化》, pages 1 - 2 * |
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Application publication date: 20220201 |