FM Transceiver Power Control for Receiver Saturation Mitigation
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Solution Overview
Problem
Simultaneous FM transmission and reception often lead to receiver saturation due to interference between transmission and reception signals operating at similar frequencies, causing degradation in reception quality.
Innovation Solution
A method and system that detect the power of RF signals and control transmission power based on a cost function derived from Bit Error Rate, Signal-to-Interference-and-Noise ratio, and Packet Error Rate to mitigate interference, using a TX power control block to adjust the gain of the power amplifier and manage signal power to prevent saturation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If FM transmission and reception operate simultaneously at similar frequencies, then communication functionality is improved, but receiver saturation occurs causing reception quality degradation
Solution Approach 1:
The patent dynamically changes the transmit power parameter based on received signal strength measurements. When the received signal power exceeds a threshold indicating potential saturation, the system reduces transmit power to prevent receiver saturation while maintaining simultaneous operation capability.
Solution Approach 2:
The system implements a feedback mechanism where the received signal power is continuously monitored and used to adjust the transmit power. The control unit receives power level information from the signal strength detector and adjusts the power amplifier gain accordingly to prevent saturation while maintaining communication functionality.
2Power
If transmit power is increased to improve transmission range, then transmission capability is improved, but interference to reception increases causing receiver saturation
Solution Approach 1:
The patent employs dynamic power control where the transmit power is not fixed but continuously adjusted based on real-time received signal strength measurements. The system transitions from static high power transmission to adaptive power levels that respond to channel conditions, preventing receiver saturation while maintaining adequate transmission range.
Solution Approach 2:
The system changes the transmit power parameter dynamically based on measured received signal strength. When saturation conditions are detected, the transmit power is reduced; when conditions permit, power is increased to maintain communication effectiveness without causing harmful interference.
Data Source
AI summary
Aspects of a method and system for mitigating receiver saturation during simultaneous FM transmission and reception may include detecting a power of an RF signal received at an antenna. A power of one or more baseband signal components corresponding to the RF signal may be determined. A power of signals transmitted via the antenna may be controlled, based on a cost function derived from at least the detected RF signal power received and/or the determined power of the one or more baseband signal components. One or more of the baseband signal components may be an in-phase signal, a quadrature signal or both an in-phase signal and a quadrature signal associated with a same carrier frequency. In one embodiment of the invention, the radio frequency signal may be an intermediate frequency (IF) radio signal.