Transmit power minimization for the Z Interference Channel

Ernest Kurniawan, Stefano Rini, Andrea Goldsmith

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We study transmit power minimization in the two-user Z Interference Channel (ZIC). When the interference link gain is strong, the capacity of the ZIC has been fully characterized. For this strong interference regime, we derive the closed-form solution of the minimum required transmit power to achieve a given rate pair, and show that the resulting power allocation between the two users is not necessarily unique. When the interference link gain is weak, the capacity of the ZIC is still an open problem to date. For this weak interference regime, we develop an inner and outer bound for the required transmit power to achieve a given rate pair, and characterize the constant power ratio relation between the two bounds. In contrast to the strong interference case, rate splitting is necessary for power minimization in this regime. The optimal power-minimizing rate splitting solution is then derived, and performance in terms of total transmit power required for a given rate pair is analyzed.

Original languageEnglish (US)
Title of host publication2013 IEEE Global Communications Conference, GLOBECOM 2013
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages2478-2483
Number of pages6
ISBN (Print)9781479913534
DOIs
StatePublished - 2013
Externally publishedYes
Event2013 IEEE Global Communications Conference, GLOBECOM 2013 - Atlanta, GA, United States
Duration: Dec 9 2013Dec 13 2013

Publication series

NameGLOBECOM - IEEE Global Telecommunications Conference

Other

Other2013 IEEE Global Communications Conference, GLOBECOM 2013
CountryUnited States
CityAtlanta, GA
Period12/9/1312/13/13

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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