RSSI-Based LNA Gain Control for WLAN-Bluetooth Interference

The patent implements dynamic LNA gain adjustment based on detected signal strength. The system continuously monitors Bluetooth and WLAN signal levels and adapts the LNA gain in real-time to prevent saturation from strong signals while maintaining sensitivity for weak signals. This dynamic adaptation resolves the interference issue by optimizing the receive path for current operating conditions rather than using a fixed gain setting.

The patent changes the LNA gain parameter based on received signal strength indication (RSSI) measurements. By measuring the strength of incoming Bluetooth and WLAN signals and adjusting the LNA gain accordingly, the system prevents signal saturation when peers are close (strong signals) while maintaining adequate amplification when peers are distant (weak signals). This parameter adaptation eliminates the need for conservative fixed-gain settings that limit performance.

The patent implements a feedback mechanism where the system measures the received signal strength indication (RSSI) of incoming Bluetooth and WLAN signals and uses this measurement to control the LNA gain. The microcontroller continuously monitors signal levels and adjusts the LNA gain setting accordingly, creating a closed-loop control system that adapts to changing signal conditions and prevents receiver saturation.

The system performs self-diagnosis and self-adjustment by measuring its own received signal strength and automatically selecting appropriate LNA gain settings without external intervention. The microcontroller evaluates the RSSI values and autonomously configures the LNA to operate optimally for the current signal environment, enabling the system to adapt to varying peer distances and signal conditions.