GSVD based blind-beamforming technique for suppression of partially overlapping Bluetooth data packets from WiFi signals

GSVD based blind-beamforming technique for suppression of partially overlapping Bluetooth data packets from WiFi signals

Shukla, S.Y.

Van der Veen, A.J. (mentor)

Electrical Engineering, Mathematics and Computer Science

Department of Microelectronics

Master Electrical Engineering, Track - Telecommunications and Sensing systems

2015-08-27

WLAN 802.11 (WiFi) and WPAN 802.15 (Bluetooth) operate in the same 2.4GHz ISM band. OFDM WLANs are designed to provide very high data rates, resilience to multipath and extended operating range. One of the main barriers to actually achieving the high data rates is the interference from the Bluetooth systems which is one of the main sources of interference in the 2.4GHz unlicensed band. This thesis investigates the interference problem and proposes a novel subspace-based method to mitigate the Bluetooth interference in WiFi signals using spatial filtering with an array of antennas. We assume continuous transmission of WLAN packets and partially overlapping, unsynchronous and intermittent Bluetooth interfering packets. The proposed method estimates the target (WiFi) and interfering (Bluetooth) signal subspaces and uses this subspace information to estimate beamformers for interference suppression. Results show that through the proposed subspace based algorithm the interference of Bluetooth transmission for 802.11 as target model can be reduced and the throughput of 802.11 can be significantly improved at the expense of additional computational complexity.

GSVD
WiFi (WLAN)
Bluetooth (WPAN)
Beamforming
Interference
Coexistence

http://resolver.tudelft.nl/uuid:5fc10819-cf6e-44b3-a93e-1efb795ee575

Student theses

master thesis

(c) 2015 Shukla, S.Y.