Title :
How large portion of K/2 DoF can we achieve at finite SNR in the Gaussian interference channel?
Author :
Junyoung Nam;Young-Jo Ko
Author_Institution :
Wireless Communications Division, Electronics and Telecommunications Research Institute (ETRI), Daejeon, Korea
Abstract :
The K/2 degrees of freedom (DoF) of the K-user Gaussian interference channel (GIC) are well known to be achievable for almost all constant real channel coefficients. In this paper, we investigate the sum-rate behavior of the K-user GIC at finite SNR. To this end, we derive closed-form upper bounds on the sum capacity for the symmetric real and semi-symmetric complex cases. We further show how large portion of K/2 DoF is achievable at realistic SNR.
Keywords :
"Upper bound","Interference channels","Random sequences","Signal to noise ratio","Noise measurement","Additive noise"
Conference_Titel :
Signals, Systems and Computers, 2015 49th Asilomar Conference on
Electronic_ISBN :
1058-6393
DOI :
10.1109/ACSSC.2015.7421352
