Abstract
Multiple antenna WiFi can achieve beamforming because the WiFi standard supports MU-MIMO technology, allowing WiFi devices to simultaneously send different data streams to multiple users. By adjusting the phase and amplitude of multiple antennas based on the CSI mechanism and matrix calculation, WiFi devices can form a main beam, concentrating the signal in a specific direction, thereby improving communication efficiency and stability.
The Bluetooth standard currently does not support the mechanisms necessary for beamforming, such as MU-MIMO. Even the Bluetooth device has multiple antennas, Bluetooth device still cannot utilize them for beamforming.
- Bluetooth communication is designed more for low power consumption, simplicity, and interoperability rather than high-speed data transmission and complex antenna techniques.
- The current Bluetooth standard does not have a CSI mechanism similar to WiFi. Therefore, there is a lack of real-time information about the channel state required for beamforming.
In this disclosure, we are going to adjust the phase difference between two antennas of the transmission from a Bluetooth host device based on the AoA/AoD information obtained from the target device. The Bluetooth host devices can focus the transmission on the direction of the target devices, thus achieving a beamforming-like effect.
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Recommended Citation
INC, HP, "Performance optimization by dual BT signal directivity enhancement", Technical Disclosure Commons, (October 04, 2024)
https://www.tdcommons.org/dpubs_series/7403