UE Antenna Imbalance Estimation for Adaptive Transmission Diversity
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Solution Overview
Problem
Wireless communication systems face challenges in managing transmission quality imbalances between multiple antennas of user equipment (UE), leading to reduced communication quality and efficiency due to static diversity schemes that do not adapt to changing conditions.
Innovation Solution
UEs estimate reception quality imbalance between antennas by analyzing reference signal received power (RSRP) for multiple subsets of time, combining these estimates to determine transmission quality imbalance, and dynamically select a transmission diversity scheme to reduce imbalances and enhance transmission gain or diversity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a static transmission diversity scheme is used, then device complexity is reduced, but communication quality deteriorates due to inability to adapt to changing transmission conditions
Solution Approach 1:
The patent implements dynamic transmission diversity scheme selection by continuously monitoring RSRP measurements from multiple antennas and adapting the transmission scheme based on current channel conditions. The UE determines quality imbalance between antennas in real-time and selects appropriate diversity schemes (e.g., transmit diversity, spatial multiplexing, or single-antenna transmission) dynamically, resolving the contradiction between static simplicity and adaptive performance.
2Reliability
If transmission quality imbalance estimation is performed continuously, then communication quality is improved, but use of energy increases due to frequent measurements and processing
Solution Approach 1:
The patent employs periodic RSRP measurements and quality imbalance estimations at defined intervals rather than continuous monitoring. The UE performs measurements on reference signals transmitted by the network at specific time points, combines these periodic measurements to determine overall quality imbalance, and adjusts transmission schemes accordingly. This periodic approach maintains communication quality while significantly reducing energy consumption compared to continuous estimation.
Data Source
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AI summary
Methods, systems, and devices for wireless communications are described to support estimation of a transmission quality imbalance between a set of antennas of a first user equipment (UE). The first UE may use the estimated transmission quality imbalance to determine a transmission diversity scheme that may decrease the transmission quality imbalance. The first UE may determine the transmission quality imbalance between the set of antennas by estimating a reception quality imbalance between the set of antennas. The first UE may estimate the reception quality imbalance for multiple subsets of a time period and may combine the reception quality imbalance estimations for the multiple subsets. The combined reception quality imbalance estimations may represent the transmission quality imbalance between the set of antennas, which may be used to determine a transmission diversity scheme for communicating a transmission to a second UE or a base station.