Shared LNA Bypass Control for Bluetooth and Wi-Fi Reception
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Solution Overview
Problem
The existing priority-based control mechanism for Bluetooth and Wi-Fi modules sharing a low noise amplifier (LNA) results in decreased anti-interference capability of Bluetooth or reduced throughput of Wi-Fi due to different gain level adjustments.
Innovation Solution
A short-range communications apparatus with a gain unit, including a first RF receive channel and a first baseband processor, utilizes a bypass switch to selectively bypass the LNA based on signal strength, allowing independent control of gain levels for each module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a priority-based control mechanism is used for Bluetooth and Wi-Fi modules sharing a low noise amplifier (LNA), then one module can obtain control permission over the shared LNA, but the anti-interference capability of Bluetooth is decreased or the throughput of Wi-Fi is reduced
Solution Approach 1:
The patent divides the shared LNA control into separate controllable paths by introducing independent bypass switches for Bluetooth and Wi-Fi modules. This allows each module to independently control its own signal path through the LNA, segmenting the previously unified control mechanism into modular, independently controllable segments that can operate simultaneously without interference.
Solution Approach 2:
The patent implements dynamic control of the LNA gain level by allowing either Bluetooth or Wi-Fi module to adjust the gain based on real-time communication needs. The system dynamically switches between different control modes depending on which module is actively transmitting or receiving, enabling adaptive optimization of both anti-interference capability and throughput under different operating conditions.
2Adaptability or versatility
If different gain levels are adjusted for Bluetooth and Wi-Fi modules, then each module can optimize its performance, but the shared LNA cannot maintain optimal settings for both modules simultaneously
Solution Approach 1:
The patent incorporates preliminary action by pre-configuring separate bypass switch control paths for both Bluetooth and Wi-Fi modules before actual communication occurs. Each module has its bypass switch and control logic prepared in advance, allowing immediate independent control when communication starts, without requiring complex real-time arbitration or reconfiguration during operation.
Data Source
AI summary
A short-range communications apparatus, a chip, and a control method are disclosed. The apparatus includes: a gain unit, coupled to an antenna; a first radio frequency (RF) receive channel, coupled to the gain unit; a first baseband processor, coupled to the first RF receive channel, and configured to receive a first signal from the antenna through the first RF receive channel; a second RF receive channel, coupled to the gain unit; and a second baseband processor, coupled to the second RF receive channel, and configured to receive a second signal from the antenna through the second RF receive channel.