Transceiver Array Beamforming Across Subarray and Full-Dimensional Modes
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing beamforming resolution and bandwidth allocation for multi-mode operations, particularly in antenna arrays, leading to suboptimal signal processing and transmission efficiency.
Innovation Solution
A multi-mode beamforming system that dynamically allocates OFDM transmissions on a slot-by-slot basis, utilizing two levels of beamforming resolution, with subarray-level processing for initial transmissions and higher resolution beamforming for subsequent slots, optimizing bandwidth and signal processing across transceiver IC subarrays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If subarray-level beamforming is used for initial transmissions, then device complexity is reduced and processing efficiency is improved, but beamforming resolution and signal precision deteriorate
Solution Approach 1:
The patent divides the antenna array into multiple subarrays, where each subarray is controlled by a separate transceiver IC. This segmentation allows parallel processing of beamformed data across multiple subarrays, improving processing efficiency while maintaining the ability to apply different beamforming resolutions to different subarrays based on channel conditions and user requirements.
Solution Approach 2:
The system dynamically adjusts the beamforming resolution for each subarray based on real-time channel conditions, user equipment locations, and traffic requirements. The transceiver ICs can adaptively switch between coarse subarray-level beamforming and fine individual-element beamforming, optimizing the balance between processing efficiency and beamforming precision dynamically.
2Measurement precision
If higher resolution beamforming is applied, then signal precision and transmission quality are improved, but bandwidth consumption and processing load increase
Solution Approach 1:
The patent applies different beamforming resolutions to different spatial regions and user groups. Users in certain directions or with specific channel characteristics receive high-resolution beamforming, while others receive lower-resolution beamforming. This local differentiation optimizes bandwidth utilization by allocating processing resources precisely where they are most needed.
Solution Approach 2:
The system changes the beamforming resolution parameter dynamically based on channel conditions, user requirements, and available bandwidth. The transceiver ICs can adjust the beamforming granularity (from subarray-level to individual element-level) and adaptively modify other parameters such as beam width and direction to optimize the trade-off between signal precision and bandwidth consumption.
3Productivity
If commonly processed IQ data packets are used across transceiver ICs, then transmission efficiency is improved, but adaptability to specific user requirements deteriorates
Solution Approach 1:
The patent merges commonly processed IQ data packets (containing channel state information, reference signals, and common control data) with user-specific beamformed data at the transceiver IC level. This allows efficient distribution of common data across all transceivers while enabling each transceiver to apply user-specific beamforming processing to its assigned subarrays, achieving both efficiency and adaptability.
Solution Approach 2:
The commonly processed IQ data packets serve multiple functions: they provide channel estimation for all users, carry reference signals for synchronization, and enable common beamforming operations. The system makes these packets universally applicable across all transceiver ICs while allowing additional user-specific processing to be applied locally at each transceiver, achieving multi-functionality without sacrificing adaptability.
Data Source
AI summary
Multi-level beamforming signal processing of frequency-domain in-phase and quadrature data packets by a group of serially-connected transceivers. Packets intended for transmission during some frames are formatted according to subarray-level beamforming, while packets for transmission in other frames are formatted according to a full-dimensional level of beamforming.