MIMO Beam Training With Unique TX/RX Sector Pair Selection
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Solution Overview
Problem
Existing MIMO antenna beam training methods for wireless communication systems with multiple array antennas fail to adequately select the best combination of TX/RX beams, leading to overlapping antenna usage and impaired MIMO operation.
Innovation Solution
A method for MIMO training that involves transmission sector sweeping, reception sector sweeping, and beam combination training to select unique TX/RX sector pairs, ensuring that each TX and RX antenna forms distinct beams, thereby preventing duplication and enabling efficient MIMO operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing antenna beam training methods are used for MIMO operation, then beam selection is simplified, but the best combination of TX/RX beams cannot be adequately selected leading to overlapping antenna usage
Solution Approach 1:
The patent segments the beam training process into three distinct phases: transmission sector sweeping, reception sector sweeping, and beam combination training. Each phase independently selects sectors for specific antenna groups, ensuring that TX and RX antennas are uniquely paired without overlap. This segmentation allows systematic selection of the best beam combinations while maintaining clear tracking of antenna usage throughout the training process.
2Productivity
If sector sweeping is performed without considering multiple sectors, then training speed is improved, but a part of array antennas used for transmission of each stream may be overlapped
Solution Approach 1:
The patent implements feedback mechanisms where the responder provides sector selection information back to the initiator at each phase. During transmission sector sweeping, the responder identifies best TX sectors; during reception sector sweeping, the initiator identifies best RX sectors. This feedback ensures that overlapping is detected and prevented, while maintaining efficient training speed through structured information exchange between devices.
3Device complexity
If the same antenna is used for multiple TX/RX sector pairs, then device complexity is reduced, but MIMO spatial streams cannot be properly supported
Solution Approach 1:
The patent introduces a new dimension of tracking antenna usage across the sector pairing process. By maintaining records of which TX and RX antennas have been paired in previous phases, the system ensures unique pairing in the final beam combination training phase. This dimensional tracking enables support for multiple MIMO spatial streams while keeping the actual antenna hardware configuration simple.
Data Source
AI summary
An MIMO training method including performing transmission sector sweeping using an initiator including a plurality of transmitting antennas, selecting a set of at least one transmission sector for each of the transmitting antennas using a responder including a plurality of receiving antennas; performing reception sector sweeping using the initiator, selecting a set of at least one reception sector for each of the plurality of receiving antennas using the responder, performing beam combination training using the initiator; and selecting a determined number of sector pairs consisting of a transmission sector and a reception sector from among the selected set of transmission sectors and the selected set of reception sectors using the responder, wherein the transmitting antennas in the selected sector pairs differ from one another, and the receiving antennas in the selected sector pairs differ from one another.