Digital Precoding with Flat Power Distribution Across Antennas
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Solution Overview
Problem
Existing precoding schemes for MIMO systems, such as ZF and WMMSE, maximize spectral efficiency while leading to wide power variations and power overshooting across antennas, resulting in energy efficiency degradation and inefficient power consumption.
Innovation Solution
A module/controller is provided to control the flatness of power distribution across antennas by setting lower and upper bounds on per-antenna power constraints (LB-PAPC and UB-PAPC) to balance spectral efficiency (SE) and energy efficiency (EE), using algorithms like Flat-WMMSE to optimize power distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing precoding schemes (ZF and WMMSE) are used to maximize spectral efficiency, then spectral efficiency is improved, but power variations across antennas increase and energy efficiency deteriorates
Solution Approach 1:
The patent introduces a flatness parameter that controls the power distribution characteristics across antennas. By adjusting this parameter, the system can modify the power allocation strategy to reduce power variations while maintaining spectral efficiency performance, thereby improving energy efficiency without sacrificing productivity
Solution Approach 2:
The patent dynamically adjusts the flatness parameter based on system conditions to optimize the trade-off between spectral efficiency and energy efficiency. The precoding scheme adapts its power distribution characteristics in real-time, transitioning between different operating points to balance the contradiction between maximizing spectral efficiency and minimizing energy consumption
2Productivity
If existing precoding schemes are used to maximize spectral efficiency, then spectral efficiency is improved, but power overshooting occurs across antennas
Solution Approach 1:
The flatness parameter serves as a control variable that directly influences power distribution stability. By optimizing this parameter, the system prevents power overshooting while maintaining spectral efficiency, ensuring reliable operation within power constraints
Solution Approach 2:
The patent implements a feedback mechanism that monitors power distribution across antennas and adjusts the flatness parameter accordingly. This closed-loop control prevents power overshooting by detecting and correcting deviations from desired power levels, ensuring stable and reliable system operation
Data Source
AI summary
Systems, methods, apparatuses, and computer program products for energy-efficient precoding with controllable power distribution. A method may include generating a digital precoder with controllable flatness based on at least one of a plurality of control parameters. The method may also include controlling flatness of a power distribution across a set of antennas, panels, or access points. The method may further include balancing, based on the control of the flatness of the power distribution, spectral efficiency and energy efficiency according to respective predefined values of spectral efficiency and energy efficiency. The balancing may include adjusting the at least one of the plurality of control parameters.