TY - JOUR
T1 - Outage analysis of block-fading gaussian interference channels
AU - Weng, Yang
AU - Tuninetti, Daniela
N1 - Funding Information:
Manuscript received August 03, 2009; revised August 26, 2010; accepted April 19, 2011. Date of current version October 07, 2011. This work was supported in part by the NSF under award number CCF 0643954. The contents of this article are solely the responsibility of the authors and do not necessarily represent the official views of the NSF. This work was presented in part in [1] and [2].
PY - 2011/10
Y1 - 2011/10
N2 - This paper considers the asymptotic behavior of the outage probability of a two-source block-fading single-antenna Gaussian interference channel in the high-SNR regime by means of the diversity-multiplexing tradeoff. A general setting where the user rates and the average channel gains are not restricted to be symmetric is investigated. This asymmetric scenario allows to analyze networks with mixed interference, i.e., when different sources are at different distance from their intended destination, that are not possible under the commonly used symmetric assumption. Inner and outer bounds for the diversity are derived. The outer bound is based on the recent to within one bit capacity result of Etkin for the unfaded Gaussian channel and is a re-derivation of a known bound for which an error is pointed out. The inner bound is based on the Han and Kobayashi achievable region both without rate splitting and with a rate spitting inspired by the "to within one bit" capacity result. An analytical comparison of the diversity upper and lower bounds for a general channel seems difficult; by numerical evaluations, the two bounds are shown to coincide for a fairly large set of channel parameters.
AB - This paper considers the asymptotic behavior of the outage probability of a two-source block-fading single-antenna Gaussian interference channel in the high-SNR regime by means of the diversity-multiplexing tradeoff. A general setting where the user rates and the average channel gains are not restricted to be symmetric is investigated. This asymmetric scenario allows to analyze networks with mixed interference, i.e., when different sources are at different distance from their intended destination, that are not possible under the commonly used symmetric assumption. Inner and outer bounds for the diversity are derived. The outer bound is based on the recent to within one bit capacity result of Etkin for the unfaded Gaussian channel and is a re-derivation of a known bound for which an error is pointed out. The inner bound is based on the Han and Kobayashi achievable region both without rate splitting and with a rate spitting inspired by the "to within one bit" capacity result. An analytical comparison of the diversity upper and lower bounds for a general channel seems difficult; by numerical evaluations, the two bounds are shown to coincide for a fairly large set of channel parameters.
KW - Diversity multiplexing tradeoff
KW - interference channel
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U2 - 10.1109/TIT.2011.2161957
DO - 10.1109/TIT.2011.2161957
M3 - Article
AN - SCOPUS:80053968444
SN - 0018-9448
VL - 57
SP - 6487
EP - 6501
JO - IEEE Transactions on Information Theory
JF - IEEE Transactions on Information Theory
IS - 10
M1 - 6034759
ER -