Abstract-The sum-rate capacity of the parallel Gaussian interference channel is shown to be achieved by independent transmission across subchannels and treating interference as noise if the channel coefficients and power constraints satisfy a certain condition. The condition requires the interference to be weak, a situation commonly encountered, e.g., in digital subscriber line transmission. The optimal power allocation is characterized by using the concavity of the sum-rate capacity as a function of the power constraints.
Reference REF showed that independent encoding across sub-channels and treating the interference as noise is optimal if the interference in each sub-channel is sufficiently weak.
Noisy-Interference Sum-Rate Capacity of Parallel Gaussian Interference Channels
IEEE Transactions on Information Theory
IEEE Transactions on Information Theory
Mathematics Computer Science