MIMO Antenna Selection for Energy Efficiency
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Solution Overview
Problem
In multiple input multiple output (MIMO) communication systems, the number of antennas used can conflict with energy efficiency, leading to increased complexity and delay in signal processing, as conventional methods often prioritize spectral efficiency over energy efficiency.
Innovation Solution
A method and apparatus that calculate the power used by a transmitting device and determine the optimal number of antennas based on both power consumption and channel capacity to maximize energy efficiency, while minimizing the decrease in channel capacity, using a power calculating unit, channel capacity calculating unit, and antenna number determining unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of transmitting antennas is increased to improve spectral efficiency, then spectral efficiency is improved, but energy efficiency deteriorates due to increased power consumption in RF chains
Solution Approach 1:
The patent changes the operating parameters of the MIMO system by dynamically determining the number of active transmitting antennas based on channel conditions, data rate requirements, and power consumption characteristics. This allows the system to adjust between using more antennas for high spectral efficiency or fewer antennas for energy efficiency depending on current operational needs
Solution Approach 2:
The system transitions from a static antenna configuration to a dynamic one where the number of active antennas can be adjusted in real-time based on varying channel conditions, traffic load, and power availability. This dynamic adaptation resolves the contradiction by allowing the system to optimize for spectral efficiency when needed and energy efficiency when needed
2Productivity
If the number of transmitting antennas is increased to improve spectral efficiency, then spectral efficiency is improved, but device complexity increases due to increased signal processing complexity
Solution Approach 1:
The patent changes the system parameters by selectively activating a subset of transmitting antennas based on channel quality metrics and processing capability constraints. This parameter adjustment allows the system to achieve high spectral efficiency when processing resources are abundant while reducing complexity when they are constrained
3Productivity
If the number of transmitting antennas is increased to improve spectral efficiency, then spectral efficiency is improved, but signal processing delay increases
Solution Approach 1:
The system dynamically adjusts the number of active transmitting antennas based on real-time channel conditions and processing delay requirements. When low latency is critical, fewer antennas are activated to reduce processing time, while when throughput is prioritized and latency constraints are relaxed, more antennas can be utilized
Data Source
AI summary
A method of determining a number of antennas, includes calculating a power used by a transmitting device. The method further includes calculating a channel capacity of the transmitting device. The method further includes determining a number of antennas of the transmitting device to be used based on the power and the channel capacity.