FEM Coordination via SPMI Discarding Corrupted RSSI
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Solution Overview
Problem
The sharing of a front-end module (FEM) among different chipsets in electronic devices for RF communications leads to reduced signal quality due to ineffective coordination of gain adjustments across various communication protocols, resulting in erroneous Received Signal Strength Indicator (RSSI) values and distorted RF signals.
Innovation Solution
A processor coordinates the operations of the FEM by using a Single-Phase Multiple Initiator (SPMI) indicator to discard corrupted RSSI values and use the last stored valid RSSI value for accurate gain adjustments, ensuring better signal quality across different communication protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a shared front-end module is used among different chipsets to preserve physical space, then device compactness is improved, but signal quality deteriorates due to uncoordinated gain adjustments
Solution Approach 1:
The system implements feedback mechanisms where the first chipset provides feedback about its gain adjustment operations to the processor, which then coordinates with the second chipset's operations. This feedback loop enables the system to maintain signal quality despite sharing the FEM by continuously monitoring and adjusting based on actual signal conditions and coordination status.
Solution Approach 2:
The processor acts as an intermediary between the first and second chipsets, coordinating their access to the shared FEM. It receives operations from both chipsets, determines coordination status, and manages the FEM access accordingly. This intermediary role enables the system to preserve signal quality by mediating between different chipset operations that would otherwise conflict.
2Adaptability or versatility
If gain adjustments are made without coordination between chipsets, then operational flexibility is improved, but measurement precision deteriorates due to erroneous RSSI values
Solution Approach 1:
The system performs preliminary coordination actions before gain adjustments are applied. The processor determines whether operations from different chipsets are coordinated before allowing them to proceed. This preliminary check prevents erroneous RSSI values from being generated in the first place, maintaining measurement precision while still allowing operational flexibility when coordination is established.
Solution Approach 2:
Feedback mechanisms enable the system to monitor coordination status and adjust operations accordingly. When coordination is detected, the system allows gain adjustments to proceed; when not coordinated, it prevents operations that would generate erroneous RSSI values. This feedback loop maintains measurement precision while preserving operational flexibility through adaptive control.
3Adaptability or versatility
If multiple communication protocols share the FEM concurrently, then device versatility is improved, but signal quality deteriorates due to distorted RF signals
Solution Approach 1:
The system dynamically adjusts FEM access based on the operational state of different communication protocols. The processor determines coordination status in real-time and dynamically controls which chipset can access the FEM at any given moment. This dynamic control enables multiple protocols to share the FEM without signal distortion, as access is granted only when protocols are coordinated or when one protocol has exclusive access rights.
Solution Approach 2:
The processor serves as an intermediary that manages interactions between multiple communication protocols sharing the FEM. It receives operations from different protocols, determines their coordination status, and mediates FEM access accordingly. This intermediary function enables the system to support multiple protocols while maintaining signal quality through coordinated access management.
Data Source
AI summary
A circuit component may determine whether first signal indicative of at least one of the plurality of communication interface circuits accessing the FEM during a respective communication slot associated with the FEM has been received, determine a first Received Signal Strength Indicator (RSSI) value for the respective communication slot used by the FEM based on data associated with the respective communication slot, and store the first RSSI value in response to the first signal not being received. The circuit component may then determine a first gain for a subsequent slot based on the first RSSI value and discard the first RSSI value in response to the first signal being received.