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 language | English |
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Pages (from-to) | 100-111 |
Number of pages | 12 |
Journal | ETRI Journal |
Volume | 38 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2016 Feb |
Keywords
- MIMO detection
- Maximum likelihood detection
- QRM-MLD
- Reconfigurable architecture
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Computer Science(all)
- Electrical and Electronic Engineering