Optimum Spectral and Energy Efficiency Tradeoff in Two-User Gaussian Interference Channel

Donghong Cai, Jingxian Wu, Jing Yang, Pingzhi Fan

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


In this letter, we study the optimum tradeoff between the spectral efficiency (SE) and energy efficiency (EE) for the two-user Gaussian interference channel (GIC). The achievable SE-EE tradeoff region of two-user GIC is obtained by studying the interactions between the two links due to their mutual interference. Each point in the SE-EE tradeoff region corresponds to a possible scheduling strategy between the two links. The optimum SE-EE tradeoff is then identified by maximizing the EE for a given sum SE, where the maximum EE is expressed as a closed-form function of the SE. The result analytically quantifies the impact of mutual interference on the SE-EE tradeoff. It is shown that the optimum scheduling strategy depends on the interference coefficients between the two links and the target SE.

Original languageEnglish (US)
Pages (from-to)468-471
Number of pages4
JournalIEEE Wireless Communications Letters
Issue number3
StatePublished - Jun 2018

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Electrical and Electronic Engineering


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