Opportunistic interference alignment for interference-limited cellular TDD uplink

Bang Chul Jung, Won Yong Shin

Research output: Contribution to journalArticlepeer-review

78 Citations (Scopus)


We introduce an opportunistic interference alignment (OIA) for cellular networks, where a user scheduling strategy is utilized in time-division duplexing uplink communication environments with time-invariant channel coefficients and multi-antenna base stations (BSs). In the OIA scheme, each BS opportunistically selects users who generate the minimum interference to the other BSs. More specifically, each BS broadcasts its pre-designed interference directions, e.g., orthonormal random vectors, to all the users in other cells. Then, each user computes the amount of its generating interference, affecting the other BSs, and feedbacks it to its home cell BS. Note that the proposed OIA does not require global channel state information, time/frequency expansion, and a number of iterations, thereby resulting in easier implementation. Simulation results show that the proposed scheme provides significant improvement in terms of sum rates.

Original languageEnglish
Article number5669627
Pages (from-to)148-150
Number of pages3
JournalIEEE Communications Letters
Issue number2
Publication statusPublished - 2011 Feb

Bibliographical note

Funding Information:
This work was supported by the Industrial Strategic Technology Development Program funded by the Ministry of Knowledge Economy (MKE, Korea) [10033822, Operation framework development of large-scale intelligent and cooperative surveillance system].

All Science Journal Classification (ASJC) codes

  • Modelling and Simulation
  • Computer Science Applications
  • Electrical and Electronic Engineering


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