MIMO Receiver AGC Switching for Accurate Shared-Spectrum Detection
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Solution Overview
Problem
MIMO receivers face inaccuracies in detecting higher-priority signals, leading to false positive detections and premature abandonment of channels, which reduces bandwidth availability due to the current methods of monitoring shared wireless spectrum.
Innovation Solution
The implementation of a dynamic Automatic Gain Controller (AGC) configuration using multiple antenna sets and AGC sets, where one set monitors for high-priority signals and another for low-priority signals, allowing for concurrent monitoring and re-association of antennas between listening and receiving states to improve detection accuracy and sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single AGC set is used to monitor both high-priority and low-priority signals, then device complexity is reduced, but measurement precision deteriorates due to inability to accurately detect both signal types simultaneously
Solution Approach 1:
The patent divides the AGC monitoring function into separate AGC sets: first AGC sets dedicated to high-priority signal detection and second AGC sets dedicated to low-priority signal detection. This segmentation allows each AGC set to be optimized for its specific signal type, improving measurement precision without requiring a single complex AGC system to handle all signal types simultaneously.
Solution Approach 2:
The patent implements antenna sets that can be dynamically re-associated between different AGC sets based on operational state. Antenna sets serve multiple functions by switching between monitoring high-priority signals with first AGC sets and monitoring low-priority signals with second AGC sets, reducing overall device complexity while maintaining detection accuracy through context-appropriate AGC configuration.
2Measurement precision
If antennas are dedicated to monitoring high-priority signals, then detection accuracy for high-priority signals is improved, but bandwidth utilization deteriorates due to reduced availability for data transmission
Solution Approach 1:
The patent implements dynamic re-association of antenna sets between different AGC sets based on operational state. During listening states, antenna sets are associated with first AGC sets for high-priority signal monitoring; during receiving states, the same antenna sets are re-associated with second AGC sets for data reception. This dynamic switching allows the system to maintain high detection accuracy when needed while maximizing bandwidth utilization during data transmission periods.
Solution Approach 2:
The patent temporarily discards the high-priority signal monitoring function of antenna sets during receiving states, allowing full dedication to data transmission. After packet reception is complete, the antenna sets are recovered and re-associated with first AGC sets to resume high-priority signal monitoring, ensuring both functions receive adequate resource allocation at appropriate times.
3Measurement precision
If multiple AGC sets are used concurrently for different signal types, then measurement precision is improved, but device complexity increases due to AGC re-association management
Solution Approach 1:
The patent implements an AGC selector that automatically manages the re-association between antenna sets and AGC sets based on operational state transitions. The system self-services by detecting when to switch between listening and receiving states and autonomously re-configuring the AGC associations without requiring complex external control logic, thereby reducing the burden on the overall control system while maintaining multiple AGC sets for precision detection.
4Productivity
If antenna sets are re-associated between AGC sets during packet reception, then bandwidth utilization is improved, but reliability deteriorates due to potential signal detection errors during transition
Solution Approach 1:
The patent performs preliminary association of antenna sets with the appropriate AGC sets before operational state transitions occur. When transitioning from listening to receiving state, the antenna sets are pre-configured with the second AGC sets before actual packet reception begins. This preliminary action ensures that the correct AGC configuration is already in place when needed, avoiding detection errors during the transition period while still enabling timely bandwidth utilization.
Data Source
AI summary
Dynamic automatic gain controller configuration in multiple input and multiple output receivers is provided by monitoring a given section of wireless spectrum for higher-priority signals using a first antenna set associated with a first Automatic Gain Controller (AGC) set while concurrently monitoring the given section of wireless spectrum for wireless packet-based traffic using a second antenna set associated with a second AGC set; in response to detecting a packet via the second antenna set: re-associating the first antenna set and the second antenna set to a third AGC set; receiving the packet via the first antenna set and the second antenna set using the third AGC set; and in response to the packet being received, re-associating the first antenna set to the first AGC set and the second antenna set to the second AGC set.