Wi-Fi Frame Indication for Beamforming-Compatible Channel Smoothing
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Solution Overview
Problem
The incompatibility between beamforming and channel smoothing in Wi-Fi systems leads to demodulation performance loss when the beamformer does not indicate the use of smooth beamforming technology, resulting in suboptimal receiving performance in low or medium signal-to-noise ratio areas.
Innovation Solution
A method and apparatus that determine whether a channel meets smoothness requirements by generating and sending indication frames, allowing the receive end to perform channel smoothing, thereby improving demodulation performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the beamformer does not indicate whether smooth beamforming technology is used, then the existing protocol is maintained, but demodulation performance of the beamformee deteriorates
Solution Approach 1:
The patent applies preliminary action by having the beamformer indicate in advance whether smooth beamforming technology is used through indication information in the first frame. This allows the beamformee to prepare and apply channel smoothing accordingly, resolving the demodulation performance loss that occurs when such indication is absent.
2Reliability
If channel smoothing is applied without proper indication, then receiving performance in low SNR areas improves, but incompatibility between beamforming and channel smoothing persists
Solution Approach 1:
The patent implements feedback by having the beamformer send indication information about smooth beamforming usage to the beamformee. This feedback mechanism enables the beamformee to adapt its channel processing accordingly, ensuring compatibility between beamforming and channel smoothing while improving receiving performance in low signal-to-noise ratio conditions.
Data Source
AI summary
This application relates to the communication field, and in particular, to an information indication method and a communication apparatus. This solution may be applied to a WLAN system that supports an 802.11 series protocol, for example, a next-generation Wi-Fi protocol of IEEE 802.11ax (for example, 802.11be, Wi-Fi 7, or EHT) or a next-generation protocol of 802.11be (for example, Wi-Fi 8); and may be further applied to a UWB-based wireless personal area network system. In the method, a first frame generated by a first device includes first indication information, and the first indication information may indicate whether a channel between a transmit end and a receive end meets a smoothness requirement, so that the receive end can perform channel smoothing when a first channel meets the smoothness requirement, to improve demodulation performance of the receive end.