MIMO Power Allocation Using Per-Transmitter Constraints

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Solution Overview

Problem

Existing MIMO communication systems face challenges in optimizing power distribution among antennas, leading to suboptimal data rates due to assumptions about power handling capacity and fixed power budgets, which limits the effectiveness of beam formation and signal transmission in multipath environments.

Innovation Solution

The system dynamically allocates power to each antenna based on its actual power handling capacity and characteristics, using complex weighting values to optimize spatial power distribution and form adaptive beams, allowing for a reconfigurable array of diverse communication devices to cooperate and enhance data transmission rates.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If power is allocated to individual transmitter devices based on water-filling algorithm assuming idealized power handling capacity, then power distribution optimization is achieved, but the approach becomes approximate and inaccurate due to not considering actual per-transmitter power constraints

Engineering Contradiction:

Improvedata transmission rateVSAvoidpower allocation accuracy

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The patent applies local quality by transitioning from a centralized water-filling power allocation approach to individual power amplifier-specific power allocation. Each power amplifier is allocated power based on its own characteristics and constraints rather than treating all transmitters uniformly, thereby improving both accuracy and actual data transmission performance.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent changes the parameter of power allocation from a global water-filling approach to individual power amplifier constraints. By modifying how power is distributed—considering each amplifier's specific power handling capacity rather than assuming idealized conditions—the system achieves more accurate and effective power allocation.

Inventive Principle:

Principle #35Parameter changes

2Ease of operation

If a fixed total power budget is assumed for the transmitter array, then power distribution can be simplified, but the system cannot adapt to actual per-transmitter power constraints and capabilities

Engineering Contradiction:

Improvepower distribution simplicityVSAvoidper-transmitter power constraint adaptation

Core Design Contradiction:

Ease of operationVSAdaptability or versatility

Solution Approach 1:

The patent segments the total power budget into individual power amplifier-specific power allocations. Instead of treating the transmitter array as a unified system with a single power budget, each power amplifier receives power allocation based on its individual constraints and capabilities, enabling both simplified per-device operation and system-wide adaptability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces dynamics by allowing power allocation to adapt to actual per-transmitter constraints rather than relying on fixed assumptions. The system dynamically adjusts power distribution based on real power amplifier characteristics, enabling flexibility and adaptability while maintaining operational simplicity through automated allocation.

Inventive Principle:

Principle #15Dynamics

3Device complexity

If idealized power handling capacity is assumed for all transmitter devices, then power allocation calculations become simpler, but the actual data transmission performance is suboptimal

Engineering Contradiction:

Improvepower allocation system complexityVSAvoideffective data rate

Core Design Contradiction:

Device complexityVSProductivity

Solution Approach 1:

The patent applies self-service by allowing each power amplifier to operate within its own power constraints without requiring complex centralized control. Each amplifier effectively manages its own power allocation based on its characteristics, reducing overall system complexity while improving effective data rate through more accurate power utilization.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS10447358B2System, method and apparatus for multi-input multi-output communications over per-transmitter power-constrained channels

Publication Date: 2019.10.15 TRUSTEES OF TUFTS COLLEGE

AI summary

A multipath communication system forms a complex weighted compound signal for transmission through a channel environment wherein the compound signal includes a complex variable weighted compound signal related to a count of available antennas, a power constraint related to each said antenna, and a channel state characteristic.