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2011

Sum Capacity of MIMO Interference Channels in the Low Interference Regime

7 years 10 months ago
Sum Capacity of MIMO Interference Channels in the Low Interference Regime
Using Gaussian inputs and treating interference as noise at the receivers has recently been shown to be sum capacity achieving for the two-user single-input single-output (SISO) Gaussian interference channel in a low interference regime, where the interference levels are below certain thresholds. In this paper, such a low interference regime is characterized for multiple-input multiple-output (MIMO) Gaussian interference channels. Conditions are provided on the direct and cross channel gain matrices under which using Gaussian inputs and treating interference as noise at the receivers is sum capacity achieving. For the special cases of the symmetric multiple-input single-output (MISO) and single-input multiple-output (SIMO) Gaussian interference channels, more explicit expressions for the low interference regime are derived. In particular, the threshold on the interference levels that characterize low interference regime is related to the input SNR and the angle between the direct and ...
V. Sreekanth Annapureddy, Venugopal V. Veeravalli
Added 15 May 2011
Updated 15 May 2011
Type Journal
Year 2011
Where TIT
Authors V. Sreekanth Annapureddy, Venugopal V. Veeravalli
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