Interference alignment and cancellation

The throughput of existing MIMO LANs is limited by the number of antennas on the AP. This paper shows how to overcome this limitation. It presents interference alignment and cancellation (IAC), a new approach for decoding concurrent sender-receiver pairs in MIMO networks. IAC synthesizes two signal processing techniques, interference alignment and interference cancellation, showing that the combination applies to scenarios where neither interference alignment nor cancellation applies alone. We show analytically that IAC almost doubles the throughput of MIMO LANs. We also implement IAC in GNU-Radio, and experimentally demonstrate that for 2x2

• Type: Conference
• Year: 2009
• Where: SIGCOMM
• Authors: Shyamnath Gollakota, Samuel David Perli, Dina Katabi
• Keywords: Communications, Interference Alignment, Interference Cancellation, MIMO LANs, SIGCOMM 2009