Antenna Port Group Codebooks for Multi-Layer Beamforming
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Solution Overview
Problem
Existing communication technologies face challenges in optimizing multi-antenna systems for maximum throughput, particularly in scenarios involving multiple antennas and layers, where signal power maximization across all receive antennas is not effectively addressed.
Innovation Solution
The proposed solution involves a method for communication that includes configuring a terminal device with a codebook comprising antenna port groups and antenna ports, and transmitting a number of layers and codebook indicators based on this configuration. These indicators include information about second vectors, antenna port groups, amplitude, and phase coefficients, which are used to determine first vectors and their properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If single-layer beamforming is used, then implementation simplicity is maintained, but signal power cannot be simultaneously maximized at every receive antenna
Solution Approach 1:
The patent segments the beamforming process into multiple layers by introducing multi-layer beamforming with precoding. Each layer can be independently optimized for signal power maximization at receive antennas, while the overall system maintains manageable complexity through structured precoding matrices and codebook-based approaches.
Solution Approach 2:
The patent transitions from single-layer to multi-layer beamforming, adding the dimension of multiple simultaneous signal streams. This enables simultaneous signal power maximization at multiple receive antennas by transmitting multiple independent streams through precoding, effectively moving the solution into a higher dimensional signal space.
2Productivity
If precoding is used for multi-layer beamforming, then throughput is maximized, but system complexity increases
Solution Approach 1:
The patent employs codebook-based precoding where the precoding matrix is selected from a predefined set of codebooks. This parameter change approach allows the system to achieve throughput maximization by selecting optimal codebook entries based on channel conditions, while avoiding the complexity of computing full precoding matrices in real-time.
Solution Approach 2:
The patent pre-configures multiple codebooks with potential precoding matrices before actual communication occurs. This preliminary preparation allows the system to quickly select and apply the optimal precoding scheme without complex real-time computations, thereby maximizing throughput while controlling system complexity.
3Productivity
If multiple streams are transmitted with independent weighting, then throughput is maximized, but codebook configuration complexity increases
Solution Approach 1:
The patent segments the codebook configuration into multiple independent codebooks, each associated with specific antenna port groups and precoding matrices. This segmentation allows the system to manage complexity by organizing codebooks in a hierarchical structure where each codebook can be independently configured and selected, while collectively supporting multiple streams with independent weighting for throughput maximization.
Data Source
AI summary
A terminal device receives a configuration for a codebook which includes: a first plurality of antenna port groups and a plurality of antenna ports in one antenna port group. The terminal device transmits a number of layers and a codebook indicator based on the codebook configuration which includes: an indicator of second vectors, and indicators for at least one of: a second plurality of antenna port groups, first amplitude coefficients, and first phase coefficients. First vectors are determined based on the plurality of second vectors and the first amplitude coefficients and/or the first phase coefficients. At least one of a length of a first vector, a number of first vectors and a size of the one or more indicators of the second vectors is based on a number of the second plurality of antenna port groups and/or the first amplitude coefficients.