Beamforming Steering Matrix for Interference Avoidance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless Local Area Networks (WLANs) face interference issues due to overlapping Basic Service Sets (OBSS) operating in the same frequency band, leading to Co-Channel Interference (CCI) and performance degradation, which existing beamforming technologies fail to adequately address.
Innovation Solution
The implementation of interference avoidance beamforming transmissions, where a device performs a channel sounding process to obtain feedback and determines a steering matrix to minimize interference leakage, allowing for directed beamforming that reduces interference to impacted devices while maintaining signal strength to intended devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beamforming transmission is performed to improve signal strength to intended devices, then signal quality is improved, but interference leakage to third devices increases
Solution Approach 1:
The patent applies local quality by making the beamforming transmission directional rather than omnidirectional. The steering matrix concentrates signal energy specifically toward the intended second device while creating nulls or reduced gain in directions of third devices, thereby providing high signal quality to the target while locally suppressing interference in other spatial directions.
Solution Approach 2:
The patent uses channel feedback from sounding processes to adaptively adjust the beamforming steering matrix. The first device performs channel sounding with third devices to obtain channel state information, then uses this feedback to calculate a steering matrix that accounts for the spatial characteristics of both intended and interfering channels, dynamically optimizing signal delivery while minimizing interference leakage.
2Manufacturing precision
If channel sounding process is performed to obtain channel feedback, then beamforming accuracy is improved, but communication time is consumed
Solution Approach 1:
The patent performs channel sounding as a preliminary action before actual data transmission. By completing the channel feedback collection and steering matrix calculation in advance, the system establishes accurate beamforming parameters beforehand, ensuring high beamforming accuracy for subsequent transmissions without repeatedly consuming time during actual data communication.
Solution Approach 2:
The patent maintains continuity of useful action by efficiently integrating channel sounding with the transmission protocol. The sounding process is performed during allocated time slots and the resulting steering matrix is reused for multiple transmissions as channel conditions remain relatively stable, thereby minimizing the time loss from sounding while maintaining continuous useful data transmission with high accuracy.
3Object-generated harmful factors
If steering matrix is determined to reduce interference leakage, then interference between Basic Service Sets is reduced, but computational complexity increases
Solution Approach 1:
The patent introduces the steering matrix as an intermediary computational element that mediates between the channel feedback and the actual beamforming transmission. The steering matrix serves as a pre-computed transformation that encapsulates the complex interference avoidance calculations, allowing the system to reduce interference between Basic Service Sets through a standardized matrix multiplication operation during transmission without repeatedly performing complex optimizations.
Data Source
AI summary
A first wireless communication device includes transceiver circuitry to access data corresponding to a beamforming transmission, transmit, from the first wireless communication device to at least one second wireless communication device, a first sounding packet, and receive, from the at least one second wireless communication device, at least one second sounding packet. The second sounding packet includes channel feedback determined at the at least one second wireless communication device. Processor circuitry is to determine a steering matrix based on the channel feedback. The steering matrix is configured to at least one of reduce and avoid interference caused at the at least one second wireless communication device by transmissions from the first wireless communication device. The transceiver circuitry is further to perform the beamforming transmission to at least one third wireless communication device in accordance with the data corresponding to the beamforming transmission and the steering matrix.