RF Transmitter Impedance Matching for Network Adaptation
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Solution Overview
Problem
Mobile terminals face significant challenges in maintaining optimal transmission performance across varying network environments due to fixed RF transmitter configurations, leading to deviations in transmit power and increased calibration delays.
Innovation Solution
A method and apparatus that adjust the matching value of the RF transmitter based on allocation information from the network, using a control unit to generate a control signal and adjust impedance through a variable impedance circuit, optimizing transmit power levels for optimal performance across different network conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the RF transmitter configuration is fixed, then the device complexity is reduced, but the transmission performance deviates significantly across different network environments
Solution Approach 1:
The patent implements a variable impedance circuit that dynamically adjusts the matching value of the RF transmitter based on network environment parameters. This transforms the fixed RF transmitter configuration into a dynamic system that adapts to different network conditions, resolving the contradiction between device simplicity and transmission performance reliability.
Solution Approach 2:
The patent changes the impedance parameter of the RF transmitter by adjusting the matching value according to allocation information from the network. This parameter adjustment allows the system to maintain optimal transmission performance across diverse network environments without fundamentally changing the device architecture.
2Ease of operation
If uniform compensation value is used for transmit power calibration, then the ease of operation is improved, but the manufacturing precision of transmit power calibration deteriorates
Solution Approach 1:
The patent applies different matching values for different network environments rather than using a uniform compensation value. By tailoring the impedance adjustment to specific network conditions (bandwidth, modulation, RB allocation), the system achieves precise transmit power calibration for each local network environment while maintaining automated operation.
Solution Approach 2:
The patent pre-configures multiple matching values corresponding to different network environments in a mapping table. When allocation information is received, the system quickly retrieves the appropriate pre-calculated matching value, avoiding real-time complex calculations while achieving environment-specific precision.
3Device complexity
If the RF transmitter uses fixed configuration, then the device complexity is reduced, but the adaptability to network environment changes deteriorates
Solution Approach 1:
The patent introduces a variable impedance circuit that enables the RF transmitter to dynamically adapt its matching value based on network environment parameters received from the base station. This dynamic capability allows the fixed-configured device to achieve environment-specific optimization without adding complex reconfigurable components.
Solution Approach 2:
The system receives allocation information (bandwidth, modulation, RB offset, frequency) from the network as feedback about the current environment. Based on this feedback, the control unit automatically selects and applies the appropriate matching value, enabling the transmitter to adapt to network changes without manual intervention.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables precise and efficient maintenance of transmission performance regardless of network environment changes, reducing calibration delays and performance deviations, and ensuring optimal transmit power levels.
Implementation Method 1
adjusting the matching value of a transmitter of the mobile terminal by changing impedance according to the control signal
Data Source
AI summary
A method and apparatus for optimizing transmission performance of a mobile terminal by adjusting a matching value of the transmitter of the mobile terminal based on the allocation information from the network are provided. The transmission performance optimization method of a mobile terminal according to the present invention includes acquiring allocation information from a network, searching for a group of information matching the allocation information from a predetermined mapping table, generating a control signal for adjusting a match value according to the group, and adjusting the matching value of a transmitter of the mobile terminal by changing impedance according to the control signal.