Beamforming-Based AGC Scheduling for Massive MIMO Reception
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Solution Overview
Problem
In wireless communication systems, particularly in massive MIMO systems, setting the Automatic Gain Control (AGC) in receiving devices efficiently is a challenge, especially when beam sweeping is utilized, leading to mismatches between received signal power and AGC gain, which degrades performance.
Innovation Solution
A method and apparatus for a receiving device that involves obtaining beamforming parameters associated with incoming signals, scheduling AGC operations based on these parameters, and applying the AGC synchronously with beamforming to predict and adjust signal power levels, thereby reducing delays and mismatches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional AGC operation is used in massive MIMO systems, then the receiving device can process signals, but mismatches occur between received signal power and AGC gain due to beam sweeping, degrading performance
Solution Approach 1:
The receiving device obtains beamforming parameters before performing AGC operation, allowing it to predict the received signal power in advance and schedule the AGC operation accordingly, preventing mismatches between AGC gain and actual signal power
Solution Approach 2:
The system uses beamforming parameters as feedback information to adjust AGC operation timing and gain settings, creating a closed-loop control mechanism that adapts to changing signal conditions in massive MIMO systems
2Adaptability or versatility
If beam sweeping is utilized in massive MIMO systems, then coverage is improved, but mismatches between received signal power and AGC gain occur, degrading performance
Solution Approach 1:
The receiving device obtains beamforming parameters associated with incoming signals before performing AGC operation, enabling it to anticipate signal power variations caused by beam sweeping and adjust AGC timing accordingly
Solution Approach 2:
The system dynamically adjusts AGC operation timing and gain settings based on beamforming parameters, allowing the AGC to adapt to the dynamic signal conditions created by beam sweeping operations
3Device complexity
If AGC operation is performed without considering beamforming parameters, then the receiving device structure is simpler, but delays and mismatches occur between AGC gain and received signal power
Solution Approach 1:
The receiving device schedules AGC operation based on beamforming parameters obtained in advance, allowing it to perform AGC adjustment at the optimal time without waiting for signal power measurements, thereby reducing delays
Solution Approach 2:
The system uses readily available beamforming parameters (already obtained for beamforming operations) to control AGC timing, eliminating the need for separate signal power measurement and feedback mechanisms
Data Source
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AI summary
Embodiments of the present disclosure provide methods, apparatuses and computer program in a receiving device. A method comprises obtaining a beamforming (BF) parameter associated with a signal to be received; scheduling an automatic gain control (AGC) operation based on the BF parameter; and applying the AGC operation on the signal according to the scheduling. Embodiments of the present disclosure may increase accuracy of AGC control and reduce/avoid performance degradation caused by reaction delay of AGC.