LLR based iterative reduced-complexity MLD algorithm with Parallel Interference Cancellation (PIC) in MIMO systems

Katsunari Honjo, Tomoaki Ohtsuki

研究成果: Conference contribution

2 被引用数 (Scopus)

抄録

We propose a log likelihood ratio (LLR) based iterative reduced-complexity maximum likelihood detection (MLD) algorithm with parallel interference cancellation (PIC) to improve detection performance in multiple-input multiple-output (MIMO) systems. In the proposed algorithm, we estimate the initial channel responses with pilot symbols and detect the initial transmitted symbols by list detection algorithm that is the reduced-complexity suboptimal detection algorithm with detection performance close to maximum likelihood detection (MLD). In the proposed algorithm, we update the channel estimates based on the minimum LLR absolute value given by turbo decoder output only when it is larger than a threshold. Using the updated channel estimates and the transmitted symbol replica, we detect the transmitted symbols by MLD algorithm after performing PIC. In the iterative detection process, we reduce the complexity by reducing the number of candidate symbols of MLD and determine the detection ordering based on LLR. We consider the proposed algorithm in an bit-interleaved turbo coded MIMO system. Simulation results show that the frame error rate (FER) performance of the initial list detection algorithm is improved by performing iterative reduced complexity MLD with PIC.

本文言語English
ホスト出版物のタイトル2007 IEEE 65th Vehicular Technology Conference - VTC2007-Spring
ページ2324-2328
ページ数5
DOI
出版ステータスPublished - 2007 8月 2
イベント2007 IEEE 65th Vehicular Technology Conference - VTC2007-Spring - Dublin, Ireland
継続期間: 2007 4月 222007 4月 25

出版物シリーズ

名前IEEE Vehicular Technology Conference
ISSN(印刷版)1550-2252

Other

Other2007 IEEE 65th Vehicular Technology Conference - VTC2007-Spring
国/地域Ireland
CityDublin
Period07/4/2207/4/25

ASJC Scopus subject areas

  • コンピュータ サイエンスの応用
  • 電子工学および電気工学
  • 応用数学

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