Joint interference alignment and power allocation under perfect and imperfect CSI

Fereidoun H. Panahi, Tomoaki Ohtsuki, Wenjie Jiang, Yasushi Takatori, Kazuhiro Uehara

研究成果: Conference contribution

2 被引用数 (Scopus)

抄録

We present centralized iterative algorithms that jointly determine the optimal transmit and receive filters as well as the optimal power allocation for a K-user multiple-input multiple-output (MIMO) interference channel (IC). The optimality criterion is based on the achievable sum-rate and the average per user multiplexing gain in the MIMO IC. By allowing channel state information (CSI) exchanged between base stations (BSs) and a central unit (CU), we design a feedback topology where CU collects local CSIs from all BSs, computes all transmit and receive filters and sends them to corresponding user-BS pairs. Note that the local CSIs at BSs are obtained from the estimation of the channel states during the so- called uplink-training phase. At the CU, we propose iterative algorithms utilizing alternating optimization strategy to design the filters. In most of the studies on the MIMO IC, choice of equal transmit powers for all user-BS pairs ignores the essential need to search for the optimal power allocation policy; they do not take the full advantage of the system's total power. Thus, how to allocate power among all the user-BS pairs in the network based on the sum-rate maximization strategy and under a sum power constraint is another key to this paper.

本文言語English
ホスト出版物のタイトル2016 IEEE Global Communications Conference, GLOBECOM 2016 - Proceedings
出版社Institute of Electrical and Electronics Engineers Inc.
ISBN(電子版)9781509013289
DOI
出版ステータスPublished - 2017 2 2
イベント59th IEEE Global Communications Conference, GLOBECOM 2016 - Washington, United States
継続期間: 2016 12 42016 12 8

Other

Other59th IEEE Global Communications Conference, GLOBECOM 2016
国/地域United States
CityWashington
Period16/12/416/12/8

ASJC Scopus subject areas

  • 計算理論と計算数学
  • コンピュータ ネットワークおよび通信
  • ハードウェアとアーキテクチャ
  • 安全性、リスク、信頼性、品質管理

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