Work

Opportunistic downlink interference alignment

Year: 2014

Type: conference-paper

Abstract: We introduce an opportunistic downlink interference alignment (ODIA) for interference-limited cellular downlink, which intelligently combines user scheduling and downlink IA techniques. The proposed ODIA not only efficiently reduces the effect of inter-cell interference from other-cell base stations (BSs) but also eliminates intra-cell interference among spatial streams in the same cell. We show that compared to the existing downlink IA schemes, the minimum number of users required to achieve a target degrees-of-freedom (DoF) can be fundamentally reduced, i.e., the fundamental user scaling law can be improved, by using the ODIA. In addition, we introduce a limited feedback strategy in our ODIA framework, and then analyze the minimum number of feedback bits required to obtain the same performance as that of the ODIA assuming perfect feedback.

Source: IEEE International Symposium on Information Theory (ISIT)

DOI: 10.1109/isit.2014.6875101

Authors: Hyun Jong Yang, Won-Yong Shin, Bang Chul Jung, Changho Suh, Arogyaswami Paulraj

Institutions: Ulsan National Institute of Science and Technology, Dankook University, Gyeongsang National University, Korea Advanced Institute of Science and Technology, Stanford University

Language: English

Topic: Advanced MIMO Systems Optimization

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W3099260211

FWCI: 6.095

Cites: 38

Cited by: 16

Related to: 10