Interference Alignment and Degrees of Freedom of the $K$-User Interference Channel

@article{Cadambe2008InterferenceAA,
  title={Interference Alignment and Degrees of Freedom of the  \$K\$-User Interference Channel},
  author={Viveck R. Cadambe and S. Jafar},
  journal={IEEE Transactions on Information Theory},
  year={2008},
  volume={54},
  pages={3425-3441}
}
For the fully connected K user wireless interference channel where the channel coefficients are time-varying and are drawn from a continuous distribution, the sum capacity is characterized as C(SNR)=K/2log(SNR)+o(log(SNR)) . Thus, the K user time-varying interference channel almost surely has K/2 degrees of freedom. Achievability is based on the idea of interference alignment. Examples are also provided of fully connected K user interference channels with constant (not time-varying… Expand
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