Dynamic Multi-Antenna Communication with Vertical Stacking
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Solution Overview
Problem
Existing access nodes are limited in their ability to handle both transmit diversity and spatial multiplexing transmission modes to their highest potential, particularly due to suboptimal arrangement and spacing of physical antennas.
Innovation Solution
The configuration of at least three physical antennas, with a horizontally-stacked pair for spatial multiplexing and a vertically-stacked pair for transmit diversity, allowing dynamic selection of transmission modes based on signal conditions, such as SINR or HARQ retransmissions, to optimize coverage and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If antennas are arranged in a conventional configuration, then device complexity is reduced, but the ability to handle both transmit diversity and spatial multiplexing modes to their highest potential is limited
Solution Approach 1:
The patent applies vertical stacking of antennas in the third dimension to enable both transmit diversity and spatial multiplexing modes simultaneously. By arranging antennas vertically rather than only horizontally, the system creates additional spatial dimensions for signal transmission, allowing it to exploit both transmission modes to their highest potential without increasing horizontal device footprint.
Solution Approach 2:
The vertically stacked antenna configuration provides multi-functionality by enabling the same antenna array to support both transmit diversity mode (for high reliability at coverage edges) and spatial multiplexing mode (for high data rates near access nodes). This universal design allows the access node to dynamically adapt to different service requirements without needing separate antenna systems.
2Reliability
If transmit diversity mode is used, then reliability is improved, but data transmission rate is reduced
Solution Approach 1:
The system dynamically switches between transmit diversity mode and spatial multiplexing mode based on real-time conditions such as wireless device location, signal strength, and service requirements. This dynamic adaptation allows the system to maximize reliability when needed (edge users) and maximize data transmission rate when conditions permit (near users), resolving the static trade-off between these two performance metrics.
Data Source
AI summary
According to exemplary embodiments described herein, communicating via a plurality of antennae includes transmitting different data streams from each of a first antenna and a second antenna in a first transmission mode, and transmitting identical data streams from a third antenna and one of the first and second antennae in a second transmission mode. The first and second antennae are horizontally stacked relative to each other and the third antenna is vertically stacked relative to both the first and second antennae.