ETRI Journal

  • 제38권1호
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  • Pages.100-111
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  • 2016
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  • 1225-6463(pISSN)
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  • 2233-7326(eISSN)
한국전자통신연구원 (Electronics and Telecommunications Research Institute)
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Low-Power Channel-Adaptive Reconfigurable 4×4 QRM-MLD MIMO Detector

  • 투고 : 2015.02.24
  • 심사 : 2015.09.30
  • 발행 : 2016.02.01
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초록

This paper presents a low-complexity channel-adaptive reconfigurable $4{\times}4$ QR-decomposition and M-algorithm-based 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 $4{\times}4$ 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.

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참고문헌

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피인용 문헌

  1. MIMO Systems in a Composite Fading and Generalized Noise Scenario: A Review vol.14, pp.None, 2016, https://doi.org/10.2174/1872212114666200129162927