Adaptive Receive Diversity for Wireless Signal Quality
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in managing multiple receive diversity chains, particularly in determining when to employ them for improving signal reception and throughput, especially in varying radio channel conditions and multiple radio access technologies.
Innovation Solution
The implementation of adaptive receive diversity techniques that toggle the state of receive diversity chains between active and inactive states based on signal quality metrics, channel conditions, and energy efficiency considerations, allowing for dynamic allocation of resources across different radio access technologies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If receive diversity chains are continuously activated to improve signal reception quality, then data reception quality is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic state transitions for receive diversity chains, switching between active and inactive states based on real-time channel conditions. The base station determines channel quality indicators and controls the activation state of receive diversity chains at the wireless device, enabling the system to adaptively adjust diversity chain usage rather than maintaining continuous activation. This dynamic approach maintains reception quality when needed while reducing power consumption during favorable channel conditions.
2Productivity
If receive diversity chains are activated to improve throughput, then data transmission rate is improved, but device complexity increases
Solution Approach 1:
The patent segments the receive diversity functionality into independently controllable chains that can be selectively activated. Instead of treating the receive diversity system as a monolithic unit, the base station can control individual receive diversity chains based on channel conditions and throughput requirements. This segmentation allows the system to activate only the necessary number of diversity chains to achieve target throughput, avoiding the complexity of continuously managing all available chains.
3Adaptability or versatility
If multiple receive diversity chains are employed to handle varying channel conditions, then adaptability is improved, but management complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where the base station receives channel quality indicators from the wireless device and uses this information to control the activation state of receive diversity chains. The base station determines channel conditions and sends control signals to activate or deactivate specific receive diversity chains, creating a closed-loop system that adapts to varying channel conditions without requiring complex local decision-making at the wireless device.
Data Source
AI summary
A wireless device comprises a primary antenna, a primary transceiver, one or more secondary antennas and one or more receive diversity chains. The receive diversity chains, in some embodiments, include transceiver capability. The wireless device measures and collects various statistics. Based on the statistics, the wireless device enables or disables one or more of the receive diversity chains with respect to a cellular radio access technology (RAT). A disabled receive diversity chain, in some instances is then powered down. During an interval when a receive diversity chain is disabled, the control logic periodically or on an event-driven basis enables a given receive diversity chain to probe channel quality indicator (CQI) and channel rank values. In some embodiments, a time interval for collecting a portion of the statistics, is adapted or backed off in anticipation of use of the receive diversity chain, based on traffic circumstances.