2009 · 321 citations · 35 references
EngineeringCommunicationElectrical EngineeringAntennasDigital CommunicationWireless CommunicationsBeamformingInterference ManagementMimo AntennasNetwork Information TheoryWireless Channel ModelingWireless NetworksInterferenceInterference AlignmentInterference CancellationMimoMimo Antenna ArraysMimo SystemsThroughput
The throughput of existing MIMO LANs is limited by the number of antennas on the AP. This paper shows how to overcome that limit by introducing interference alignment and cancellation (IAC) for decoding concurrent sender‑receiver pairs. IAC combines interference alignment and interference cancellation, enabling decoding in scenarios where each technique alone fails. Analytical and experimental results show that IAC nearly doubles throughput, achieving 1.5× downlink and 2× uplink gains in 2×2 MIMO LANs.
The throughput of existing MIMO LANs is limited by the number of antennas on the AP. This paper shows how to overcome this limit. 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 MIMO LANs, IAC increases the average throughput by 1.5x on the downlink and 2x on the uplink.
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