Virtual Antenna Mapping Matrix for Power Distribution
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Solution Overview
Problem
In multi-antenna systems, power distribution among physical antennas is often imbalanced due to a 1:1 correspondence with virtual antennas, leading to varying power consumption and inefficient signal transmission.
Innovation Solution
A method and apparatus for uniformly distributing power among physical antennas using a corresponding matrix that maps virtual antennas and physical antennas in a many-to-many correspondence, employing a precoding vector to address power imbalance and interference rejection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a 1:1 correspondence between virtual antennas and physical antennas is used, then the system structure is simple, but power distribution among physical antennas becomes imbalanced
Solution Approach 1:
The patent segments the 1:1 antenna mapping into multiple mapping relationships. Instead of directly mapping each virtual antenna to one physical antenna, it introduces intermediate mapping stages that distribute signals across multiple physical antennas, thereby achieving uniform power distribution while maintaining structural simplicity.
Solution Approach 2:
The patent introduces an intermediary mapping mechanism between virtual and physical antennas. This intermediary layer processes the signal distribution to ensure that each physical antenna receives balanced power, resolving the contradiction between simple structure and uniform power distribution.
2Measurement precision
If reference signals are allocated separately for each virtual antenna, then channel estimation accuracy is improved, but power consumption increases due to repeated transmissions
Solution Approach 1:
The patent merges reference signal transmissions across multiple virtual antennas that map to the same physical antenna. By combining these transmissions, the system maintains accurate channel estimation while reducing redundant power consumption from repeated reference signal transmissions.
Solution Approach 2:
The patent makes the reference signal allocation universal across multiple virtual antennas. A single reference signal transmission serves multiple virtual antennas simultaneously, achieving both accurate channel estimation and reduced power consumption through multi-functional usage of the reference signal.
3Device complexity
If virtual antennas are mapped to physical antennas in a 1:1 correspondence, then the mapping process is simple, but interference rejection capability is reduced
Solution Approach 1:
The patent segments the direct 1:1 mapping into multiple intermediate mapping stages. This segmentation allows the system to maintain simple overall structure while introducing complexity at the mapping stage that enhances interference rejection capability through diversified signal paths.
Solution Approach 2:
The patent adds another dimension to the antenna mapping by introducing intermediate virtual antennas and multi-stage mapping. This dimensional expansion provides additional degrees of freedom for interference management while keeping the fundamental mapping concept simple.
Data Source
AI summary
An apparatus and a method for mapping virtual antennas and physical antennas in a wireless communication system. The method for mapping the virtual antennas and the physical antennas includes generating at least two virtual antenna signals for at least two virtual antennas. The method also includes generating at least two physical antenna signals by applying a corresponding matrix, which maps the at least two virtual antennas and the at least two physical antennas in many-to-many relation, to the at least two virtual antenna signals. The method further includes transmitting the at least two physical antenna signals over respective physical antennas.