MU-MIMO Sounding Sequence Encoding for Lower Feedback Overhead
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Solution Overview
Problem
The overhead for channel information feedback in multi-user multi-input multi-output (MU-MIMO) wireless communication systems is high, limiting the size of channel information that can be fed back.
Innovation Solution
A method and device for performing a sounding sequence in a wireless communication system, involving an access point transmitting a null data packet announcement (NDPA) frame with encoded channel information fields and a station receiving and encoding this information to generate a compressed beamforming report (CBR) frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the size of channel information being fed back is increased, then communication performance is improved, but the overhead for the feedback increases
Solution Approach 1:
The patent applies parameter changes by transforming the channel information from its original high-precision representation to a compressed representation with reduced precision. The encoder processes the channel information and generates compressed beamforming report frames that contain encoded channel information, effectively changing the parameter of data size while maintaining sufficient communication performance for beamforming operations.
2Quantity of substance
If the feedback overhead is reduced, then the size of channel information that can be fed back is limited, but communication performance may be compromised
Solution Approach 1:
The patent introduces an intermediary encoder component that mediates between the channel information and the feedback transmission. The encoder receives the full channel information, processes it through encoding operations, and generates compressed beamforming report frames. This intermediary structure allows the system to reduce feedback overhead while preserving the essential information needed for effective beamforming, thus resolving the contradiction between feedback size and communication performance.
Data Source
AI summary
Disclosed are a device and a method for performing a sounding sequence in a wireless communication system. A method of an access point communicating with a station in a wireless local area network (WLAN) system includes obtaining a null data packet announcement (NDPA) frame including one or more fields, the one or more fields being associated with an encoder for encoding channel information, and transmitting the NDPA frame to the station.