Decomposing the MIMO wiretap channel

Anatoly Khina, Yuval Kochman, Ashish Khisti

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

6 Scopus citations


The problem of sending a secret message over the multiple-input multiple-output (MIMO) wiretap Gaussian channel is studied. While the capacity of this channel is known, it is not clear how to construct optimal coding schemes that achieve this capacity. In this work we show how to use linear operations along with successive interference cancellation in order to reduce the problem to that of designing optimal codes for the single-antenna additive-noise Gaussian wiretap channel. Much like popular communication techniques in the absence of an eavesdropper, the data is carried over parallel streams. The design approach is flexible enough to allow for using the same scalar wiretap code over all streams, or alternatively to use different scalar wiretap codes over parallel sub-channels without successive interference cancellation. This approach is applicable to more involved secrecy settings, by adjusting the linear operations performed by the encoder, and by jointly processing several channel uses.

Original languageEnglish
Title of host publication2014 IEEE International Symposium on Information Theory, ISIT 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages5
ISBN (Print)9781479951864
StatePublished - 2014
Event2014 IEEE International Symposium on Information Theory, ISIT 2014 - Honolulu, HI, United States
Duration: 29 Jun 20144 Jul 2014

Publication series

NameIEEE International Symposium on Information Theory - Proceedings
ISSN (Print)2157-8095


Conference2014 IEEE International Symposium on Information Theory, ISIT 2014
Country/TerritoryUnited States
CityHonolulu, HI


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