Title
To Decode the Interference or to Consider It as Noise
Abstract
In this paper, the impact of noncoordinated interfering signals on a point to point communication is addressed. While the transmitter has no information about the other users' messages, the receiver has full knowledge of the codebooks of the interfering users and can potentially decode some part of the interference. A simple coding strategy is proposed for this channel. Assuming its own data is decoded successfully, the receiver partitions the set of interfering users into two disjoint subsets, namely the set of decodable users and the set of nondecodable users. Then the transmitter's rate is chosen such that the intended signal can be jointly decoded with the set of decodable users. It is proved that the proposed strategy achieves the capacity of the additive Gaussian channel with Gaussian interfering users. A polynomial time algorithm is proposed to compute the achievable rate of the scheme. This algorithm is based a subroutine which separates the set of interfering users into decodable and nondecodable users in polynomial time. The proposed scheme is also applied to the case of -user interference channel and some achievable points are characterized by successive maximization of users' rates.
Year
DOI
Venue
2007
10.1109/TIT.2010.2103756
IEEE Transactions on Information Theory
Keywords
DocType
Volume
index terms— interference channel,submod- ular functions,capacity region,proposed scheme,proposed strategy,additive gaussian channel,user interference channel,achievable point,polynomial time,combinatorial optimization.,decodable user,polynomial time algorithm,achievable rate,nondecodable user,interference,random variable,transmitters,channel capacity,additives,point to point communication,noise,combinatorial optimization,gaussian distribution,data transmission,information theory,random variables,decoding
Journal
57
Issue
ISSN
Citations 
3
0018-9448
15
PageRank 
References 
Authors
1.04
25
2
Name
Order
Citations
PageRank
A. S. Motahari1151.04
A. K. Khandani229719.65