AGC Calibration via Self-Service Feedback Loop
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Solution Overview
Problem
Existing wireless communication systems face challenges in calibrating automatic gain control (AGC) without additional hardware, which is desirable to enhance performance and reduce production costs.
Innovation Solution
A method for calibrating AGC in wireless devices involves transmitting a calibration signal, receiving and decoding it to produce measurements, and adjusting the AGC gain settings, allowing for calibration without additional hardware by utilizing existing transceivers and antennas in MIMO systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If additional hardware is implemented to accomplish AGC calibration, then calibration accuracy is improved, but production cost increases
Solution Approach 1:
The system uses existing transceivers and antennas to perform self-calibration of the AGC. The transceiver transmits calibration signals and measures the received signal strength, allowing the system to determine optimal gain settings without external calibration equipment. This self-service approach eliminates the need for additional calibration hardware while maintaining calibration accuracy.
Solution Approach 2:
The existing transceiver and antenna are made multi-functional by using them for both normal communication and AGC calibration purposes. The same hardware components that handle data transmission and reception are also utilized to transmit and measure calibration signals, thereby serving dual functions without requiring dedicated calibration hardware.
2Ease of manufacture
If AGC calibration is performed without additional hardware, then production cost is reduced, but measurement precision deteriorates
Solution Approach 1:
The system implements a feedback mechanism where the transceiver transmits calibration signals, measures the received signal strength indicator (RSSI), and uses this feedback information to determine optimal AGC gain settings. The measured RSSI values are used to adjust the gain settings, creating a closed-loop calibration process that ensures accuracy without additional hardware.
Solution Approach 2:
The calibration process is performed preliminarily during system initialization or setup phases, before normal operation begins. By conducting the calibration in advance using existing hardware, the system establishes accurate gain settings that will be used throughout operation, ensuring measurement precision is achieved without requiring additional calibration equipment during normal use.
Data Source
AI summary
Disclosed herein is an iterative process for calibrating an AGC in a wireless system, wherein the iterative process comprises transmitting a calibration signal, receiving the calibration signal, decoding the calibration signal to produce a measurement, storing the measurement and changing an AGC gain setting.