Precoding Codebook Transmission via Indicator Set
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Solution Overview
Problem
Current methods for downloading precoding codebooks in wireless communication systems are cumbersome due to the need to transmit complex information for every element of the codebook, which increases data transmission requirements and inefficiencies.
Innovation Solution
A system and method for transmitting a precoding codebook over an air interface using a set of indicators that includes less information than the full codebook, allowing derivation of the codebook at the receiving station through operations such as mirroring, predefined magnitude or phase, dependency between complex elements, or hierarchical composition, reducing the amount of data needed for transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the full precoding codebook is transmitted over the air interface, then the receiving station can obtain complete codebook information for accurate precoding operations, but the amount of data to be transmitted increases significantly
Solution Approach 1:
The patent extracts only the essential parameters needed to reconstruct the codebook (such as codebook index, configuration parameters, and channel state information) rather than transmitting the entire codebook. This allows the receiving station to derive the complete codebook information from a condensed set of transmitted parameters, significantly reducing data transmission volume while maintaining information completeness.
Solution Approach 2:
The codebook transmission is segmented into multiple components: codebook index identification, configuration parameters, and channel state information. Each component is transmitted separately and used by the receiving station to reconstruct the full codebook, reducing the overall transmission burden while ensuring complete codebook information is available.
2Loss of information
If conventional methods transmit complex numbers for every element of every matrix in the codebook, then complete codebook information is delivered, but the signaling procedure becomes cumbersome and inefficient
Solution Approach 1:
Instead of transmitting the actual complex codebook matrices, the patent transmits a condensed representation (codebook index and configuration parameters) that allows the receiving station to generate or retrieve the full codebook information. This copying approach reduces signaling complexity while ensuring complete information delivery.
Solution Approach 2:
The patent changes the representation parameters from transmitting full complex matrices to transmitting condensed parameters (indices, configuration values, and channel state information). This parameter transformation simplifies the signaling procedure while maintaining the ability to deliver complete codebook information at the receiving end.
Data Source
AI summary
Embodiments of the present invention include a system for transmitting a precoding codebook over an air interface. The system includes a first station configured to signal a set of indicators via at least one antenna to a second station from which the precoding codebook is derived at the second station based on the signaled set of indicators. The set of indicators includes less information than the precoding codebook.