The Feasibility of Interference Alignment for MIMO Interfering Broadcast - Multiple-Access Channels

Sang Woon Jeon, Kiyeon Kim, Janghoon Yang, Dong Ku Kim

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The feasibility conditions of interference alignment (IA) are analyzed for interfering broadcast-multiple-access channels in which one cell operates as downlink but the other cell operates as uplink. Under a general multiple-input and multiple-output antenna configuration, a necessary condition and a sufficient condition for one-shot linear IA are established, i.e., linear IA without symbol or time extension. In various example networks of interest, the optimal sum degrees of freedom (DoFs) are characterized by the derived necessary condition and sufficient condition. For symmetric DoF within each cell, a sufficient condition is established in a more compact expression, which yields the necessary and sufficient condition for a class of symmetric DoFs. An iterative construction of transmit and receive beamforming vectors is further proposed, which provides a specific beamforming design satisfying one-shot IA. Simulation results demonstrate that the proposed IA not only achieves larger DoF, but also significantly improves the sum rate over the single-cell operation in the practical signal-to-noise ratio regime.

Original languageEnglish
Article number7924412
Pages (from-to)4614-4625
Number of pages12
JournalIEEE Transactions on Wireless Communications
Volume16
Issue number7
DOIs
Publication statusPublished - 2017 Jul 1

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Multiple Access Channel
MIMO systems
Multiple-input multiple-output (MIMO)
Broadcast
Alignment
Interference
Sufficient Conditions
Cell
Beamforming
Necessary Conditions
Degree of freedom
Uplink
Antenna
Signal to noise ratio
Antennas
Configuration
Output
Demonstrate
Simulation

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

Cite this

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abstract = "The feasibility conditions of interference alignment (IA) are analyzed for interfering broadcast-multiple-access channels in which one cell operates as downlink but the other cell operates as uplink. Under a general multiple-input and multiple-output antenna configuration, a necessary condition and a sufficient condition for one-shot linear IA are established, i.e., linear IA without symbol or time extension. In various example networks of interest, the optimal sum degrees of freedom (DoFs) are characterized by the derived necessary condition and sufficient condition. For symmetric DoF within each cell, a sufficient condition is established in a more compact expression, which yields the necessary and sufficient condition for a class of symmetric DoFs. An iterative construction of transmit and receive beamforming vectors is further proposed, which provides a specific beamforming design satisfying one-shot IA. Simulation results demonstrate that the proposed IA not only achieves larger DoF, but also significantly improves the sum rate over the single-cell operation in the practical signal-to-noise ratio regime.",
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The Feasibility of Interference Alignment for MIMO Interfering Broadcast - Multiple-Access Channels. / Jeon, Sang Woon; Kim, Kiyeon; Yang, Janghoon; Kim, Dong Ku.

In: IEEE Transactions on Wireless Communications, Vol. 16, No. 7, 7924412, 01.07.2017, p. 4614-4625.

Research output: Contribution to journalArticle

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