Joint Channel Estimation Across Contiguous PRGs With Same-Precoder Signaling
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Solution Overview
Problem
In wireless communication systems, performing joint channel estimation across physical resource block groups (PRGs) that span contiguous frequency resources is hindered by the use of different precoders for different PRGs, leading to unreliable channel estimation due to separate channel estimations.
Innovation Solution
By indicating to the receiving device that a set of PRGs are associated with the same precoder, enabling joint channel estimation across these PRGs, the transmitting device ensures consistent amplitudes and phases, allowing reliable joint channel estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If separate channel estimations are performed for different PRGs, then device complexity is reduced, but channel estimation reliability deteriorates
Solution Approach 1:
The patent combines multiple PRGs into a single joint channel estimation process. By indicating to the UE that a set of PRGs are associated with the same precoder, the network enables the UE to perform joint channel estimation across these PRGs, merging the estimation process to improve reliability while maintaining manageable complexity through standardized procedures.
2Reliability
If joint channel estimation is performed across multiple PRGs, then channel estimation reliability is improved, but device complexity increases
Solution Approach 1:
The network performs preliminary action by indicating to the UE which PRGs are associated with the same precoder before the UE performs joint channel estimation. This advance information allows the UE to efficiently organize the estimation process across multiple PRGs without excessive complexity, as the grouping is predetermined and signaled by the network.
Solution Approach 2:
The patent changes the parameter of precoder association across PRGs. By ensuring that a set of PRGs are associated with the same precoder (rather than different precoders), the system enables joint channel estimation with improved reliability. This parameter change allows the UE to use consistent estimation methods across multiple PRGs without excessive complexity.
3Adaptability or versatility
If different precoders are used for different PRGs, then adaptability is improved, but channel estimation accuracy deteriorates
Solution Approach 1:
The patent segments the frequency spectrum into multiple PRGs, where each PRG can be associated with the same precoder for joint channel estimation. This segmentation allows adaptability at the PRG level while maintaining consistency within each segment, enabling both precoder adaptability across different PRGs and accurate joint channel estimation within each group of PRGs sharing the same precoder.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a network node, signaling indicating whether a set of physical resource block groups (PRGs) comprises a subset of PRGs that are associated with a same precoder, wherein the subset of PRGs comprises a plurality of PRGs that span contiguous frequency resources. The UE may receive, from the network node, a transmission via the set of PRGs. The UE may perform a joint channel estimation based on the subset of PRGs when the subset of PRGs are associated with the same precoder. Numerous other aspects are described.