Low-power channel-adaptive reconfigurable 4×4 QRM-MLD MIMO detector

Iput Heri Kurniawan, Ji Hwan Yoon, Jong-Kook Kim, Jongsun Park

Research output: Contribution to journalArticle

Abstract

This paper presents a low-complexity channel-adaptive reconfigurable 4 × 4 QR-decomposition and M-algorithmbased maximum likelihood detection (QRM-MLD) multiple-input and multiple-output (MIMO) detector. Two novel design approaches for low-power QRM-MLD hardware are proposed in this work. First, an approximate survivor metric (ASM) generation technique is presented to achieve considerable computational complexity reduction with minor BER degradation. A reconfigurable QRM-MLD MIMO detector (where the M-value represents the number of survival branches in a stage) for dynamically adapting to time-varying channels is also proposed in this work. The proposed reconfigurable QRM-MLD MIMO detector is implemented using a Samsung 65 nm CMOS process. The experimental results show that our ASM-based QRM-MLD MIMO detector shows a maximum throughput of 288 Mbps with a normalized power efficiency of 10.18 Mbps/mW in the case of 4 × 4 MIMO with 64-QAM. Under time-varying channel conditions, the proposed reconfigurable MIMO detector also achieves average power savings of up to 35% while maintaining a required BER performance.

Original languageEnglish
Pages (from-to)100-111
Number of pages12
JournalETRI Journal
Volume38
Issue number1
DOIs
Publication statusPublished - 2016 Feb 1

Keywords

  • Maximum likelihood detection
  • MIMO detection
  • QRM-MLD
  • Reconfigurable architecture

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Science(all)
  • Electronic, Optical and Magnetic Materials

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