Joint coding in parallel symmetric interference channels with deterministic model

Yifan Xue, Yafei Tian, Chenyang Yang
2017 EURASIP Journal on Wireless Communications and Networking  
In parallel interference channels, the sum-rate achieved by joint coding among subchannels can exceed the sum of the achievable rate of each subchannel with individual coding. In this paper, a capacity-achieving joint coding scheme is proposed for parallel symmetric interference channel. First, we provide a motivating example, from which the insights into the joint coding scheme are obtained. Second, we introduce a transmission scheme in two-user parallel symmetric interference channels, where
more » ... he subchannels can cooperate to cancel interference. Then, by taking advantage of signal level alignment of the interference from different users, we generalize the scheme to multi-user cases. Finally, we prove that our scheme can achieve the sum capacity and illustrate the generalized degrees of freedom gains over individual coding in various interference scenarios.
doi:10.1186/s13638-017-0834-2 fatcat:qzhz73hmrve3rcavfir4m5gwiy