Rapid automatic gain control (AGC) method

Abstract

The invention belongs to the technical field of wireless communication, and relates to automatic gain control (AGC), in particular to a rapid automatic gain control method. According to the method, aself-adaptive adjustment mode is mainly adopted, a received signal is subjected to analog-to-digital conversion to obtain a corresponding power level, current absolute power is obtained through comparison operation with a reference power level, and channel gain G, needing to be adjusted, of AGC is obtained through rapid operation with expected absolute power as a target. In order to save operationtime, segmentation is carried out according to the power value, the gain value corresponding to each segment interval is calculated in advance and stored in a memory during initialization, after operation is started, the current power level is directly compared, and the corresponding channel gain G is adjusted. The channel gain needing to be adjusted can be prepared and obtained efficiently onlythrough level comparison of one period, so that the time consumed by AGC adjustment is reduced to the minimum, and the requirement for real-time performance of the system is met.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, relates to automatic gain control (AGC), and particularly designs a fast automatic gain control method. Background technique [0002] In an air-ground integrated data transmission system, the quality of the received signal becomes the most important evaluation parameter for handover. The magnitude of the received signal power is the most intuitive reflection of the signal quality. Therefore, the accurate calculation of the received signal power directly determines the accuracy and reliability of the system networking. [0003] When the airborne is within the effective receiving range of two or more base stations on the ground at the same time, multiple base stations will start to perform AGC adjustment on the received airborne signal at the same time when the airborne effective transmission time slot, when the received signal converges to When within the best receiving range, the ...

AI Technical Summary

Problems solved by technology

However, the existing technology needs to rely on SPI to read the register to obtain the power value. Due to the slow speed of the SPI interface, it will take a long time to read multiple power values ​​and then perform AGC. The time consumed by AGC far exceeds the system index and cannot meet the real-time performance of the system

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