CN-122001498-A - Gain automatic control method, system, equipment and storage medium for radio frequency expansion unit

Abstract

The application discloses an automatic gain control method for a radio frequency expansion unit, which comprises the steps of receiving a calibration signal by the radio frequency expansion unit, detecting to obtain a detection power value, comparing the detection power value with a reference power value pre-stored in the radio frequency expansion unit, dynamically adjusting the gain of a gain control circuit in the radio frequency expansion unit according to the comparison result to enable the detection power value to gradually approach to the reference power value, and fixing the current gain value of the gain control circuit when the difference between the detection power value and the reference power value is within a preset threshold range, so as to automatically compensate the insertion loss of a radio frequency cable. The application also discloses a gain automatic control system for the radio frequency expansion unit, corresponding equipment and a storage medium. The gain automatic control method for the radio frequency expansion unit provided by the embodiment of the application can accurately and automatically compensate the insertion loss introduced by radio frequency cables with different lengths, and improves the deployment efficiency and adaptability of the carrier-based communication system.

Inventors

• HU JING
• LI LIHAO
• YANG JIJIE
• WANG XIAOJUAN
• FAN JINQI
• Xiao Zhuoer
• ZHANG ZHIQIAN
• NIE BU
• HUANG GANGLIN
• LIU YU
• XU ZHE
• YUAN LINGJUN
• DUAN ZHE
• Zeng Fanku
• JIANG SHIYU
• DENG ZHIBIN
• ZHANG MIN
• JING MIN
• WU MINGJUN
• HU ZHI

Assignees

• 武汉船舶通信研究所(中国船舶集团有限公司第七二二研究所)

Dates

Publication Date

20260508

Application Date

20260130

Claims (9)

1. 1. An automatic gain control method for a radio frequency expansion unit, comprising the steps of: the radio frequency expansion unit receives the calibration signal and detects to obtain a detection power value; Comparing the detection power value with a reference power value pre-stored in the radio frequency expansion unit, and dynamically adjusting the gain of a gain control circuit in the radio frequency expansion unit according to the comparison result to enable the detection power value to gradually approach the reference power value; when the difference between the detection power value and the reference power value is within a preset threshold value range, the current gain value of the gain control circuit is fixed, and the insertion loss of the radio frequency cable is automatically compensated.
2. 2. The automatic gain control method for a radio frequency expansion unit according to claim 1, further comprising controlling a host unit to transmit a calibration signal of a predetermined power at power-on start-up before said radio frequency expansion unit receives the calibration signal.
3. 3. The automatic gain control method for a radio frequency expansion unit according to claim 1, wherein the calibration signal is an FSK modulated signal generated via an FSK modem chip.
4. 4. The method according to claim 1, wherein the step of dynamically adjusting the gain of the gain control circuit in the rf extension unit according to the comparison result comprises gradually increasing the gain of the gain control circuit by a control signal until the difference between the detected power value and the reference power value is within a preset threshold.
5. 5. The automatic gain control method for a radio frequency expansion unit according to claim 1, wherein said reference power value is stored in an EEPROM memory of said radio frequency expansion unit.
6. 6. A gain automatic control system for implementing the gain automatic control method for a radio frequency expansion unit according to any one of claims 1 to 5, characterized in that the system comprises: a calibration signal generation module for generating and transmitting a calibration signal of the predetermined power when the system is started; the power detection module is used for receiving and detecting the power of the calibration signal transmitted by the cable; A storage module for storing the reference power value; a gain control module including the gain-adjustable gain control circuit and an amplification circuit for applying the fixed gain; and the control module is respectively connected with the power detection module, the storage module and the gain control module and is used for executing dynamic adjustment and gain fixation.
7. 7. The automatic gain control system for a radio frequency expansion unit of claim 6 further comprising a calibration status indication module for flashing during calibration and being normally on after calibration is completed in response to instructions from said control module.
8. 8. An automatic gain control device for a radio frequency expansion unit, characterized by comprising at least one processing unit and at least one memory unit, wherein the memory unit stores a computer program which, when executed by the processing unit, causes the processing unit to perform the steps of the method of any of claims 1-5.
9. 9. A storage medium storing a computer program executable by a gain automatic control device for a radio frequency expansion unit, which when run on the gain automatic control device for a radio frequency expansion unit causes the gain automatic control device for a radio frequency expansion unit to perform the steps of the method according to any one of claims 1-5.

Description

Gain automatic control method, system, equipment and storage medium for radio frequency expansion unit Technical Field The present application relates to the field of communications technologies, and in particular, to a method, a system, an apparatus, and a storage medium for automatically controlling a gain of a radio frequency expansion unit. Background With the development of offshore communication technology, the carrier-based platform has very high requirements on the reliability and coverage distance of wireless communication. In order to realize stable communication between the carrier-based terminal and a fixed base station outside 50 km, a high-power radio frequency expansion unit is often adopted to amplify signals. In a typical carrier-based deployment, the antenna is installed 10 meters high, while the host unit is installed in the cabin. To reduce long-distance feeder losses, the rf extension unit must be mounted as close to the antenna as possible, which results in the length of the rf cable connecting the host unit and the rf extension unit becoming a variable. In practical applications, the cable length may vary from 10 meters to 50 meters and even longer, with the insertion loss introduced therein also fluctuating substantially between 3dB and 15 dB. Therefore, how to ensure that the radio frequency expansion unit can still stably output the specified maximum power under the condition that the input power is unknown and dynamically changed due to cable loss becomes a key technical challenge for guaranteeing the edge access capability of the carrier-based terminal. Disclosure of Invention In view of at least one of the foregoing drawbacks and the needs of the prior art, the present application provides a method, system, apparatus, and storage medium for automatically controlling gain of a radio frequency expansion unit, which solve at least one of the problems of the prior art. To achieve the above object, according to a first aspect of the present application, there is provided an automatic gain control method for a radio frequency expansion unit, comprising the steps of: the radio frequency expansion unit receives the calibration signal and detects to obtain a detection power value; Comparing the detection power value with a reference power value pre-stored in the radio frequency expansion unit, and dynamically adjusting the gain of a gain control circuit in the radio frequency expansion unit according to the comparison result to enable the detection power value to gradually approach the reference power value; when the difference between the detection power value and the reference power value is within a preset threshold value range, the current gain value of the gain control circuit is fixed, and the insertion loss of the radio frequency cable is automatically compensated. Further, the method for automatically controlling the gain of the radio frequency expansion unit further comprises the step of controlling the host unit to transmit a calibration signal with a preset power when the host unit is powered on before the radio frequency expansion unit receives the calibration signal. Further, in the automatic gain control method for a radio frequency expansion unit, the calibration signal is an FSK modulation signal generated through an FSK modem chip. Further, in the above method for automatically controlling gain of a radio frequency expansion unit, the dynamically adjusting gain of a gain control circuit in the radio frequency expansion unit according to the comparison result specifically includes gradually increasing the gain of the gain control circuit by a control signal until a difference between the detected power value and the reference power value is within a preset threshold range. Further, in the above method for automatically controlling gain of a radio frequency expansion unit, the reference power value is stored in an EEPROM memory of the radio frequency expansion unit. According to a second aspect of the present application, there is also provided a gain automatic control system for implementing the gain automatic control method for a radio frequency expansion unit according to any one of the above, the system comprising: a calibration signal generation module for generating and transmitting a calibration signal of the predetermined power when the system is started; the power detection module is used for receiving and detecting the power of the calibration signal transmitted by the cable; A storage module for storing the reference power value; a gain control module including the gain-adjustable gain control circuit and an amplification circuit for applying the fixed gain; and the control module is respectively connected with the power detection module, the storage module and the gain control module and is used for executing dynamic adjustment and gain fixation. Further, the automatic gain control system for the radio frequency expansion unit further comprises a calibration st