Multi-Antenna AGC Glitch Correction Using Branch Correlation
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Solution Overview
Problem
Current automatic gain control (AGC) systems in multi-antenna communication networks experience performance degradation due to glitches at the AGC trigger/release points, which cannot be completely eliminated by existing solutions.
Innovation Solution
The proposed solution involves determining correlation information between data on affected and unaffected antenna branches, using this information to correct data contaminated by glitches through interpolation, thereby eliminating interference and ensuring glitch-free AGC.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If AGC is used to control analog attenuators to extend dynamic range, then the dynamic range is extended, but glitches are introduced at AGC trigger/release points due to non-ideal transient response
Solution Approach 1:
The patent uses an intermediary filtering mechanism that processes the attenuator output signal to remove glitches before it reaches the communication device. This intermediary filter acts as a mediator between the AGC-controlled attenuator and the communication device, eliminating the harmful transient responses while preserving the extended dynamic range capability.
Solution Approach 2:
The patent extracts and removes the glitch components from the signal by identifying the transient response portions at AGC trigger and release points, then eliminating these harmful elements while retaining the useful signal content. This separation allows the system to maintain extended dynamic range without the detrimental effects of glitches.
2Adaptability or versatility
If AGC state changes from low attenuation to high attenuation stage, then the system responds to high input signal power, but performance deterioration occurs due to glitches at the trigger point
Solution Approach 1:
The patent applies preliminary filtering action by preparing the filtering mechanism in advance to handle upcoming AGC transitions. The filter is configured to anticipate and mitigate glitches before they can deteriorate performance, ensuring that the AGC response remains adaptable while maintaining reliable communication performance during state changes.
3Adaptability or versatility
If AGC state changes from high attenuation to low attenuation stage, then the system responds to low input signal power, but performance deterioration occurs due to glitches at the release point
Solution Approach 1:
The patent implements feedback mechanisms that monitor the AGC state changes and adjust the filtering parameters accordingly. When detecting AGC release transitions from high to low attenuation, the feedback system activates appropriate filtering to suppress glitches, ensuring that the adaptable AGC response does not compromise communication performance.
Data Source
AI summary
Various embodiments of the present disclosure provide a method for multi-antenna transmission. The method which may be performed by a communication device comprises determining first correlation information in response to interference to data on a first subset of multiple antenna branches of the communication device. The first correlation information may indicate at least correlation between the data on the first subset of the multiple antenna branches and data on a second subset of the multiple antenna branches which is not affected by interference. The method further comprises correcting the data on the first subset of the multiple antenna branches, based at least in part on the first correlation information.