Dual-Port SSB Polarization Scheme for Accurate Rx Beam Selection
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Solution Overview
Problem
Existing wireless communication networks using single antenna port SSB transmission for polarization MIMO fail to accurately account for different transmission characteristics of polarizations, leading to reduced Rx beam selection accuracy.
Innovation Solution
Implementing dual port SSB transmission with different polarizations on separate antenna ports to enable the UE to determine optimal Rx beams based on measurements of multiple SSBs, using channel matrix estimation and MMSE equalization to enhance signal strength and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If single antenna port is used for SSB transmission, then device complexity is reduced, but Rx beam selection accuracy deteriorates
Solution Approach 1:
The patent segments the SSB transmission into multiple antenna ports (at least two ports), where each port transmits SSB with a different polarization. This segmentation allows the UE to measure and select optimal Rx beams for each polarization separately, thereby improving beam selection accuracy while maintaining manageable device complexity through structured transmission.
Solution Approach 2:
The patent introduces polarization as an additional dimension for SSB transmission by using multiple antenna ports with different polarizations. This dimensional expansion enables the system to capture signal characteristics across different polarization angles, improving Rx beam selection accuracy by providing more measurement dimensions for the UE to evaluate optimal beam directions.
2Device complexity
If single antenna port transmits SSB, then transmission simplicity is maintained, but signal strength for MIMO communication deteriorates
Solution Approach 1:
The transmission is segmented across multiple antenna ports with different polarizations, allowing the system to transmit diverse signal versions that can be combined or selected based on channel conditions. This segmentation improves signal strength for MIMO communication by exploiting polarization diversity while keeping the transmission configuration systematic and manageable.
Solution Approach 2:
The patent employs composite transmission by combining multiple SSB transmissions with different polarizations from multiple antenna ports. This composite approach creates a more robust signal structure that improves overall signal strength and reliability for MIMO communication, analogous to using composite materials to enhance physical strength.
3Productivity
If single antenna port is used, then channel capacity is limited, but system simplicity is maintained
Solution Approach 1:
By segmenting SSB transmission across multiple antenna ports with different polarizations, the system enables the UE to identify optimal Rx beams for each polarization. This segmentation directly increases channel capacity for MIMO communication by allowing parallel or combined use of multiple polarization channels, while the segmented structure keeps the system organized and manageable.
Solution Approach 2:
The patent adds polarization as another dimension for channel utilization, effectively expanding the channel capacity by exploiting the polarization domain. This dimensional expansion allows the system to transmit and receive multiple independent data streams with different polarizations, increasing productivity while maintaining a structured antenna port configuration.
Data Source
AI summary
Techniques described herein include solutions for utilizing dual port synchronization signal block (SSB) transmissions for multiple receive (Rx) beam selection. In some aspects, a base station transmits a first SSB with a first polarization on a first antenna port, and transmits a second SSB with a second polarization on a second antenna port. The first and second SSBs may be transmitted, for example, using a first transmission reception point (TRP). A user equipment (UE) receives the first and second SSBs, and identifies one or more optimal Rx beams for multiple-input multiple-output (MIMO) communication based on the first and second SSBs.