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Low Complexity Soft-Output Signal Detector for Spatial-Multiplexing MIMO System

Publiceringsår: 2011
Språk: Engelska
Sidor: 1718-1722
Publikation/Tidskrift/Serie: 2011 IEEE 22ND INTERNATIONAL SYMPOSIUM ON PERSONAL INDOOR AND MOBILE RADIO COMMUNICATIONS (PIMRC)
Dokumenttyp: Konferensbidrag
Förlag: IEEE

Sammanfattning

This paper presents a cost-efficient soft-output signal detector design solution targeting on the spatial-multiplexing MIMO system. The detector achieves low hardware cost and near-optimal detection performance based on the modification to the fixed-complexity sphere decoder (FSD) using several implementation-oriented algorithm-level improvements, which are early-pruning with polygon-shaped constraint, symbol-level bit-flipping, and l1-norm approximation. To evaluate the proposed method, we implement the MIMO detector in a 65-nm standard VT CMOS technology. The core area is 0.14 mm2 with 69 K equivalent gates, representing a 60% hardware-resource saving to the state of art in the open literature. The detecting throughput is up to 1.5Gb/s at 250-MHz clock frequency and 1.2-V supply. The normalized energy consumption of 36.4 pJ/b is shown to be the most energy-efficient design compared with other soft-output detectors.

Disputation

Nyckelord

  • Technology and Engineering

Övrigt

22nd Annual IEEE symposium on Personal Indoor Mobile Radio Communications (PIMRC 2011)
2011-09--11
Toronto, Canada
Published
Yes
  • Digital ASIC
  • ISBN: 978-1-4577-1348-4

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