Regulated PA Switch Banks for MIMO Transceiver Power Scaling
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Solution Overview
Problem
The increasing power consumption of multiple-input multiple-output (MIMO) wireless transceivers, driven by enhanced throughput capabilities and always-on nature, necessitates methods to reduce energy consumption while maintaining communication efficiency.
Innovation Solution
A wireless MIMO transceiver apparatus with regulated switch banks that dynamically adjust the supply voltage levels for power amplifiers based on signal amplitude and link information, using a link power circuit to determine optimal voltage levels and allocate them efficiently across transmit chains, thereby minimizing power consumption without degrading signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple transmit chains with power amplifiers are used to enhance MIMO throughput capacity, then communication throughput is improved, but power consumption increases significantly
Solution Approach 1:
The patent implements dynamic voltage scaling for power amplifiers in MIMO transceivers. The system continuously monitors signal amplitude and link quality, then adjusts the supply voltage to each power amplifier in real-time. This dynamic adjustment allows the system to maintain high throughput when needed while reducing power consumption during low-activity periods, directly resolving the contradiction between productivity and energy usage.
Solution Approach 2:
The invention changes the operating parameters of power amplifiers by adjusting supply voltage levels based on communication conditions. The system modifies voltage parameters dynamically according to signal amplitude and link quality metrics, enabling the same hardware to operate efficiently across different throughput requirements, thus addressing the power-consumption vs. throughput trade-off.
2Loss of energy
If supply voltage levels are reduced to decrease power consumption, then energy efficiency is improved, but signal quality and communication reliability may degrade
Solution Approach 1:
The patent incorporates feedback mechanisms that continuously monitor link quality and signal amplitude. Based on this feedback, the system intelligently adjusts power amplifier voltage levels to maintain minimum signal quality thresholds while maximizing energy efficiency. The feedback loop ensures that voltage reduction does not compromise communication reliability, resolving the contradiction between energy efficiency and signal quality.
Solution Approach 2:
The system dynamically changes operating parameters (voltage levels) based on communication conditions. By adjusting voltage parameters in response to real-time link quality assessments, the system maintains signal integrity while optimizing energy efficiency, thus resolving the trade-off between these two parameters.
3Loss of energy
If voltage levels are dynamically adjusted for each power amplifier, then power consumption is reduced, but device complexity increases due to additional control circuits
Solution Approach 1:
The patent merges the voltage control functionality into the existing power amplifier architecture. The control circuits for dynamic voltage adjustment are integrated with the power management and signal processing components already present in the MIMO transceiver. This merging approach reduces the overall device complexity increase while still achieving power consumption reduction through dynamic voltage adjustment.
Data Source
AI summary
A transceiver apparatus for wireless communication includes components coupled to one another to form transmit chains for wireless communications. The components forming the transmit chains include power amplifiers (PA)s each coupled at a respective signal input to a corresponding one of the transmit chains for amplifying radio frequency (RF) signals of a wireless communication link and each power amplifier having a supply voltage input for powering the power amplifier, voltage sources having distinct voltage levels, and PA supply voltage detectors each coupled at an input to an associated one of the transmit chains to detect changes in an amplitude of the signal on each transmit chain. The transceiver apparatus includes a link power circuit coupled to the PA supply voltage detectors, the link power circuit to determine maximum voltage levels to be applied to the supply voltage inputs of the PAs.