RF Front-End Reconfiguration for Beamforming Power Savings
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Solution Overview
Problem
Current millimeter wave (mmW) radio frequency (RF) front-end circuitry faces challenges in efficiently managing power consumption and operational modes, particularly in implementing amplitude and phase weighting for beamforming and diversity communication, which can lead to increased power usage and complexity.
Innovation Solution
The proposed solution involves an apparatus and method that includes converter circuits for upconverting and downconverting baseband signals to RF signals, with the ability to selectively apply amplitude or phase weights based on operational modes, and controlling the power state of converter circuits, allowing for power savings by powering down unused circuits during certain operational modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If amplitude and phase weighting circuits are implemented for beamforming and diversity communication, then communication performance is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic reconfiguration of the RF front-end circuitry based on operational modes. The system can switch between different configurations: in diversity mode, the second converter circuit is powered down and RF weighting is applied to the first RF signal; in beamforming mode, both converter circuits remain active with appropriate weighting. This dynamic adaptation resolves the contradiction by activating weighting functions only when needed and powering down unused circuits.
2Adaptability or versatility
If multiple converter circuits are used to support multiple operational modes, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent designs the RF front-end with multi-functional converter circuits that can operate in different modes. The first and second converter circuits can each serve multiple purposes: the first circuit handles both diversity and beamforming operations, while the second circuit provides additional beamforming capability when needed. The shared RF weighting circuits apply weights to signals from either converter, enabling a single hardware configuration to support multiple operational modes without requiring separate dedicated circuits for each function.
3Use of energy by moving object
If RF weighting is applied in the RF domain for diversity mode, then power consumption is reduced, but implementation complexity increases
Solution Approach 1:
The patent combines the RF weighting functionality into shared circuits that can serve both diversity and beamforming operations. The first RF weighting circuit receives the first RF signal and applies weights based on the operational mode. By merging the weighting functions and using shared hardware resources rather than separate dedicated circuits for each mode, the implementation complexity is managed while maintaining the power consumption benefits of RF-domain weighting in diversity mode.
Data Source
AI summary
Certain aspects of the present disclosure generally relate to radio frequency (RF) front-end circuitry. For example, certain aspects provide an apparatus having a first converter circuit configured to upconvert a first baseband (BB) signal to a first RF signal based on a mode of operation, and a second converter circuit configured to upconvert a second BB signal to a second RF signal based on the mode of operation. The apparatus also includes a first RF weight adjustment circuit configured to selectively apply an amplitude weight or a phase weight to at least one of the first RF signal or the second RF signal based on the mode of operation, and a controller configured to control a power state of the second converter circuit in dependence on the mode of operation.