Wireless Apparatus Two-Stage Weight Generation for Channel Estimation
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Solution Overview
Problem
Existing wireless communication methods face challenges in achieving accurate channel estimation and maintaining separation performance of spatially multiplexed signals, leading to inadequate communication quality.
Innovation Solution
A wireless apparatus and method that involve multiplying reference signals by first weights, estimating channel responses, converting these responses into second channel responses, and generating second weights for improved communication, ensuring better separation performance and channel estimation accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of beams selected to improve channel estimation accuracy is limited, then channel estimation accuracy is improved, but the separation performance of spatially multiplexed signals is deteriorated
Solution Approach 1:
The patent divides the weight generation process into two distinct stages: first weights are generated based on channel estimation from selected beams, and second weights are generated by combining first weights with beamforming weights. This segmentation allows the system to use a limited number of beams for accurate channel estimation while still maintaining good separation performance through the two-stage weight combination process.
Solution Approach 2:
The patent transitions from a single-stage weight generation approach to a two-dimensional approach by introducing both first weights (from channel estimation) and second weights (from beamforming combination). This dimensional expansion allows the system to simultaneously optimize for both channel estimation accuracy and signal separation performance.
2Measurement precision
If weights are generated using estimated channel values from selected beams, then channel estimation accuracy is improved, but the number of estimated channel values is reduced, deteriorating separation performance
Solution Approach 1:
The patent segments the weight generation into two parts: first weights derived from channel estimation (providing accuracy) and second weights derived from beamforming (providing sufficient quantity). This segmentation resolves the contradiction by obtaining weights from two different sources rather than relying solely on channel estimation from limited beams.
Solution Approach 2:
The patent merges first weights (from channel estimation) and beamforming weights (from selected beams) to generate second weights. This combination allows the system to leverage both the accuracy of channel estimation and the spatial diversity of multiple beams, thereby maintaining both estimation accuracy and separation performance.
3Productivity
If a plurality of beams are used for spatial multiplexing, then communication capacity is improved, but the separation performance deteriorates due to insufficient estimated channel values
Solution Approach 1:
The patent performs preliminary channel estimation using first weights before generating the final second weights. This preliminary action allows the system to prepare accurate channel information in advance, which is then combined with beamforming weights to achieve both high communication capacity and good separation performance.
Solution Approach 2:
The patent adds a temporal dimension to the weight generation process by introducing a two-stage procedure: first weight generation followed by second weight generation. This temporal separation allows the system to handle multiple beams for high capacity while maintaining separation performance through the structured two-stage approach.
Data Source
AI summary
A wireless apparatus includes a first weight multiplication part, a channel estimation part, a channel response conversion part, and a second weight generation part. The first weight multiplication part includes first weights, each of which corresponds to an individual one of a plurality of beams, and multiplies a signal(s) corresponding to a reference signal(s) transmitted from a wireless terminal(s) by the first weights. The channel estimation part estimates first channel responses for the respective beams by using the signals obtained by the multiplication by the first weights. The channel response conversion part converts the first channel responses into second channel responses by using the first weights. The second weight generation part generates second weights used for wireless communication with the wireless terminal(s) by using the second channel responses.