A new approach of interference alignment through asymmetric complex signaling and multiuser diversity

Hun Young Shin, Seok Hwan Park, Haewook Park, Inkyu Lee

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

In this letter, we consider a new interference alignment (IA) strategy for single-input single-output interference broadcast channels with constant channel coefficients. First, we show that 1.5 degrees of freedom (DOF) is achievable for 3-cell case by utilizing asymmetric complex signaling (AC) and multiuser diversity without symbol extension. It is also investigated that the achievable DOF varies with the user scaling condition and ω(√SNR}) is required for guaranteeing the DOF of 1.5. To improve the sum-rate performance, user scheduling algorithms combined with the beamforming techniques are suggested which outperform the conventional IA schemes. After introducing an exhaustive scheduling algorithm which shows optimal sum-rate, a simplified scheduling method is also proposed which reduces both scheduling metric computations and the search size.

Original languageEnglish
Article number6123783
Pages (from-to)880-884
Number of pages5
JournalIEEE Transactions on Wireless Communications
Volume11
Issue number3
DOIs
Publication statusPublished - 2012 Mar 1

Fingerprint

Multiuser Diversity
Scheduling algorithms
Alignment
Interference
Degree of freedom
Scheduling
Scheduling Algorithm
Beamforming
Broadcast Channel
Vary
Scaling
Metric
Output
Cell
Coefficient

Keywords

  • asymmetric complex signaling
  • Interference alignment
  • multiuser diversity

ASJC Scopus subject areas

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

Cite this

A new approach of interference alignment through asymmetric complex signaling and multiuser diversity. / Shin, Hun Young; Park, Seok Hwan; Park, Haewook; Lee, Inkyu.

In: IEEE Transactions on Wireless Communications, Vol. 11, No. 3, 6123783, 01.03.2012, p. 880-884.

Research output: Contribution to journalArticle

@article{a1f29e58a5614da3a5aac0e355726cb5,
title = "A new approach of interference alignment through asymmetric complex signaling and multiuser diversity",
abstract = "In this letter, we consider a new interference alignment (IA) strategy for single-input single-output interference broadcast channels with constant channel coefficients. First, we show that 1.5 degrees of freedom (DOF) is achievable for 3-cell case by utilizing asymmetric complex signaling (AC) and multiuser diversity without symbol extension. It is also investigated that the achievable DOF varies with the user scaling condition and ω(√SNR}) is required for guaranteeing the DOF of 1.5. To improve the sum-rate performance, user scheduling algorithms combined with the beamforming techniques are suggested which outperform the conventional IA schemes. After introducing an exhaustive scheduling algorithm which shows optimal sum-rate, a simplified scheduling method is also proposed which reduces both scheduling metric computations and the search size.",
keywords = "asymmetric complex signaling, Interference alignment, multiuser diversity",
author = "Shin, {Hun Young} and Park, {Seok Hwan} and Haewook Park and Inkyu Lee",
year = "2012",
month = "3",
day = "1",
doi = "10.1109/TWC.2012.010312.102034",
language = "English",
volume = "11",
pages = "880--884",
journal = "IEEE Transactions on Wireless Communications",
issn = "1536-1276",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "3",

}

TY - JOUR

T1 - A new approach of interference alignment through asymmetric complex signaling and multiuser diversity

AU - Shin, Hun Young

AU - Park, Seok Hwan

AU - Park, Haewook

AU - Lee, Inkyu

PY - 2012/3/1

Y1 - 2012/3/1

N2 - In this letter, we consider a new interference alignment (IA) strategy for single-input single-output interference broadcast channels with constant channel coefficients. First, we show that 1.5 degrees of freedom (DOF) is achievable for 3-cell case by utilizing asymmetric complex signaling (AC) and multiuser diversity without symbol extension. It is also investigated that the achievable DOF varies with the user scaling condition and ω(√SNR}) is required for guaranteeing the DOF of 1.5. To improve the sum-rate performance, user scheduling algorithms combined with the beamforming techniques are suggested which outperform the conventional IA schemes. After introducing an exhaustive scheduling algorithm which shows optimal sum-rate, a simplified scheduling method is also proposed which reduces both scheduling metric computations and the search size.

AB - In this letter, we consider a new interference alignment (IA) strategy for single-input single-output interference broadcast channels with constant channel coefficients. First, we show that 1.5 degrees of freedom (DOF) is achievable for 3-cell case by utilizing asymmetric complex signaling (AC) and multiuser diversity without symbol extension. It is also investigated that the achievable DOF varies with the user scaling condition and ω(√SNR}) is required for guaranteeing the DOF of 1.5. To improve the sum-rate performance, user scheduling algorithms combined with the beamforming techniques are suggested which outperform the conventional IA schemes. After introducing an exhaustive scheduling algorithm which shows optimal sum-rate, a simplified scheduling method is also proposed which reduces both scheduling metric computations and the search size.

KW - asymmetric complex signaling

KW - Interference alignment

KW - multiuser diversity

UR - http://www.scopus.com/inward/record.url?scp=84858340733&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84858340733&partnerID=8YFLogxK

U2 - 10.1109/TWC.2012.010312.102034

DO - 10.1109/TWC.2012.010312.102034

M3 - Article

AN - SCOPUS:84858340733

VL - 11

SP - 880

EP - 884

JO - IEEE Transactions on Wireless Communications

JF - IEEE Transactions on Wireless Communications

SN - 1536-1276

IS - 3

M1 - 6123783

ER -