Repeater Node Pilots for Channel Estimation in Wireless Networks
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently estimating and managing the transmission channel of repeater nodes, leading to inefficiencies in channel equalization and configuration, especially when multiple hops are involved, which consumes computing and network resources.
Innovation Solution
Incorporating repeater node pilots into the signal forwarded by repeater nodes, allowing for channel estimation in two steps, reducing the pilot density in the original signal and enabling the control node to configure the repeater node for improved spectrum efficiency and reduced error rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If channel estimation is performed using only original pilots in multi-hop repeater networks, then channel estimation can be performed, but the pilot density required increases and computing resources are consumed inefficiently
Solution Approach 1:
The patent segments the channel estimation process into two distinct steps: first estimating the transmission channel from the transmitter node to the repeater node using original pilots, and second estimating the transmission channel from the repeater node to the receiver node using repeater node pilots. This segmentation allows each estimation to use appropriate pilot density and processing methods, improving overall efficiency while maintaining accuracy.
Solution Approach 2:
The repeater node acts as an intermediary that not only forwards signals but also generates and transmits its own pilots to the receiver node. This intermediary pilot transmission enables the receiver to independently estimate the second hop channel without requiring excessive pilots from the original transmitter, thereby reducing overall pilot density requirements and computing resource consumption.
2Measurement precision
If repeater node pilots are added to the forwarded signal, then channel estimation accuracy improves and spectrum efficiency increases, but the signal structure becomes more complex
Solution Approach 1:
The patent divides the overall communication signal into two separate signal paths with distinct pilot structures. The first path uses original pilots for transmitter-to-repeater channel estimation, while the second path uses repeater node pilots for repeater-to-receiver channel estimation. This segmentation simplifies the signal structure at each hop rather than requiring a single complex signal structure for the entire multi-hop path.
3Measurement precision
If high pilot density is used in the original signal for channel estimation, then channel estimation accuracy is maintained, but spectrum efficiency decreases and error rates increase
Solution Approach 1:
The patent segments the pilot transmission into two separate stages: original pilots transmitted from the transmitter node to the repeater node, and repeater node pilots transmitted from the repeater node to the receiver node. This segmentation allows each stage to use appropriate pilot density optimized for that specific hop, preventing the need for excessively high overall pilot density that would reduce spectrum efficiency and increase error rates.
Solution Approach 2:
The patent changes the parameter of pilot density distribution across different hops in the communication path. Instead of using uniform high pilot density throughout, the system adjusts pilot density locally at each hop based on channel conditions and requirements, thereby maintaining estimation accuracy while reducing overall pilot overhead and improving reliability.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a repeater node may receive a first signal to be forwarded to a receiver node or a control node. The repeater node may generate a second signal that includes repeater node pilots and the first signal to be forwarded to the receiver node or the control node. The repeater node may transmit, to the receiver node or the control node, the second signal. Numerous other aspects are provided.