Line Panel Codebook for Wireless Feedback
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Solution Overview
Problem
In multi-panel array systems, there is a challenge in designing a codebook that improves the accuracy of feedback information while reducing computational complexity and feedback overhead, due to phase uncertainty and increased complexity with multiple antennas.
Innovation Solution
A method and device for determining codewords and panel phase factors for each line panel in a transmitter, precoding data based on these, and transmitting the precoded signal, which includes a multi-antenna array, transceiver, memory, and processor configured to perform these operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a multi-panel array system is used to increase the number of antennas, then system capacity and coverage are improved, but phase uncertainty between panels increases and codebook design complexity worsens
Solution Approach 1:
The patent divides the multi-panel array into multiple line panels, where each line panel has its own codebook. This segmentation allows independent codebook design for each line panel, reducing the overall complexity compared to designing a single codebook for the entire multi-panel system. The receiver can selectively feedback codewords from specific line panels based on channel conditions.
Solution Approach 2:
The patent introduces a new dimension to codebook design by organizing antennas into line panels with specific geometric arrangements. This dimensional organization allows the system to handle phase uncertainty through structured codebook designs that account for the spatial relationships between panels, rather than treating all antennas as a uniform array.
2Measurement precision
If a comprehensive codebook covering all panels is designed, then feedback accuracy is improved, but feedback overhead increases
Solution Approach 1:
The patent implements partial action by allowing the receiver to feedback codewords from only certain line panels rather than all panels. The receiver can selectively choose which line panels to report based on channel quality, thereby maintaining feedback accuracy for active panels while reducing overall feedback overhead by omitting panels that contribute less to system performance.
Solution Approach 2:
By segmenting the codebook into line panel-specific codebooks, the system enables selective feedback where only relevant line panels are reported. This segmentation transforms a single large feedback structure into multiple smaller, manageable feedback units, reducing overhead while preserving accuracy for the most important panels.
3Reliability
If precise beamforming is implemented across multiple panels, then system performance is improved, but computational complexity increases
Solution Approach 1:
The patent segments the beamforming computation into line panel-specific operations. Each line panel has its own codebook and precoding calculations, which can be performed independently. This segmentation reduces computational complexity compared to calculating precoding for the entire multi-panel system as a single unified structure, while still achieving precise beamforming for each panel.
Data Source
AI summary
The present disclosure relates to design of a line panel codebook and a method and an apparatus for transmission and reception based on it in a wireless communication system. A method in which a transmitter transmits a precoded signal to a receiver in a wireless communication system according to an embodiment of the present disclosure may include determining one or more codewords and a panel phase factor for each of a plurality of line panels equipped with the transmitter; precoding data which will be transmitted to the receiver based on the determined one or more codewords and a panel phase factor; and transmitting the precoded signal to the receiver.