Generalized Degrees of Freedom of the Symmetric K-user Interference Channel with Feedback

被引：0
|
作者：
Mohajer, Soheil [1 ]
Tandon, Ravi [1 ]
Poor, H. Vincent [1 ]
机构：
[1] Univ Calif Berkeley, Berkeley, CA 94720 USA
来源：
2012 IEEE INTERNATIONAL SYMPOSIUM ON INFORMATION THEORY PROCEEDINGS (ISIT) | 2012年
关键词：
CAPACITY;
D O I：
暂无
中图分类号：
TP301 [理论、方法];
学科分类号：
081202 ;
摘要：
The symmetric K user interference channel with fully connected topology is considered, in which (a) each receiver suffers interference from all other K - 1 transmitters, and (b) each transmitter has causal and noiseless feedback from its respective receiver. The number of generalized degrees of freedom (GDoF) is characterized in terms of alpha, where the interference-to-noise ratio (INR) is given by INR = SNR alpha. It is shown that the number of per-user GDoF of this network is the same as that of the 2-user interference channel with feedback, except for alpha - 1, for which existence of feedback does not help in terms of GDoF. The coding scheme proposed for this network, termed cooperative interference alignment, is based on two key ingredients, namely, interference alignment and interference decoding.
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页数：5
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