Single-Carrier Beamforming Feedback Mode for Mobile Devices
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Solution Overview
Problem
Existing wireless communication technologies, such as those using orthogonal frequency-division multiplexing (OFDM), can be unsuitable in dynamic environments and impose a high computational load on mobile devices, limiting their effectiveness in fluid communication settings.
Innovation Solution
A method for establishing a wireless link using single-carrier digital beamforming, where a transmitter station sends beamforming training data and receives feedback data in either multi-subcarrier or single-carrier mode, allowing for the generation of beamforming parameters based on an uncompressed time-domain channel representation, reducing computational burden by converting feedback data into frequency and time-domain representations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If orthogonal frequency-division multiplexing (OFDM) is used to enhance communication speed and reliability, then communication performance is improved, but computational load on mobile devices increases
Solution Approach 1:
The patent segments the beamforming feedback process into two distinct modes: multi-subcarrier feedback mode for high performance scenarios and single-carrier feedback mode for low computational load scenarios. This segmentation allows the system to divide the problem space and apply different processing approaches based on environmental and device conditions, thereby improving reliability when needed while reducing computational burden when appropriate.
Solution Approach 2:
The system dynamically selects between single-carrier and multi-subcarrier feedback modes based on channel conditions and device capabilities. The transmitter and receiver can negotiate and switch between modes during operation, making the system adaptive to changing environmental conditions and computational constraints, thus resolving the contradiction between reliability and device complexity.
2Productivity
If OFDM modulation is implemented to enhance communication speed, then data transmission rate is improved, but computational complexity on mobile devices increases
Solution Approach 1:
The patent changes the feedback parameter representation by offering two modes: full multi-subcarrier feedback for high accuracy and compressed single-carrier feedback for reduced complexity. By changing the parameter representation format based on conditions, the system achieves high data transmission rates when channel conditions warrant it, while reducing computational complexity in more challenging or resource-constrained scenarios.
3Measurement precision
If beamforming training data is processed in multi-subcarrier mode, then beamforming accuracy is improved, but processing time and computational resources increase
Solution Approach 1:
The system applies partial action by selecting single-carrier feedback mode when full multi-subcarrier processing is not necessary. This allows the system to achieve sufficient beamforming accuracy for many practical scenarios without incurring the full computational cost and processing time of multi-subcarrier mode, effectively resolving the contradiction between precision and time.
Data Source
AI summary
A method in a transmitter station for establishing a wireless link with a receiver station includes: sending beamforming training data to the receiver station; responsive to sending the beamforming training data, receiving from the receiver station: beamforming feedback data; and a beamforming feedback mode indicator selected from (i) a multi-subcarrier feedback mode, and (ii) a single carrier feedback mode; when the beamforming feedback mode indicator corresponds to the single carrier feedback mode, obtaining beamforming parameters based on the beamforming feedback data.