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Area-efficient configurable high-throughput signal detector supporting multiple MIMO modes

Författare:
Publiceringsår: 2012
Språk: Engelska
Sidor: 2085-2096
Publikation/Tidskrift/Serie: IEEE Transactions on Circuits and Systems Part 1: Regular Papers
Volym: 59
Nummer: 9
Dokumenttyp: Artikel i tidskrift
Förlag: IEEE--Institute of Electrical and Electronics Engineers Inc.

Sammanfattning

Abstract in Undetermined

This paper presents a low-complexity, highthroughput,

and configurable multiple-input multiple-output

(MIMO) signal detector design solution targeting the emerging

Long-Term-Evolution-Advanced (LTE-A) downlink. The detector

supports signal detection of multiple MIMO modes, which

are spatial-multiplexing (SM), spatial-diversity (SD), and spacedivision-multiple-access (SDMA). Area-efficiency is achieved by

algorithm and architecture co-design where low-complexity, nearmaximum-likelihood (ML) detection algorithms are proposed

for these three MIMO modes respectively while keeping in

mind that the operations can be reused among different modes.

A parallel multistage VLSI architecture is accordingly developed

that achieves high detection throughput and run-time

reconfigurability without extra hardware overhead. To further

improve the implementation efficiency, the detector also adopts an

orthogonal-real-value-decomposition (ORVD) aided candidatesharing

technology for low-cost partial Euclidean distance calculation

and a distributed interference cancelation scheme for a

critical path delay reduction. The proposed multi-mode MIMO

detector has been implemented using a 65-nm CMOS technology

with a core area of 0.18 mm2 (the equivalent gate-count is 88.7K),

representing a 22% less hardware-resource use than the state

of art in the open literature. Operating at 1.2-V supply with

250-MHz clock, the detector achieves a 3Gb/s throughput when

configured to the 4x4 64-QAM spatial-multiplexing mode, which

is about 1.5 times over previous implementations. Moreover, the

normalized energy consumption of 44.1 pJ/b is shown to be the

most energy-efficient design compared with other works.

Nyckelord

  • Electrical Engineering, Electronic Engineering, Information Engineering
  • spatial-diversity (SD)
  • spatial-multiplexing (SM)
  • signal detector
  • Multiple-input multiple-output (MIMO)
  • spacedivision-multiple-access (SDMA)
  • configurable
  • very-large scale integration (VLSI).

Övriga

Published
  • Digital ASIC-lup-obsolete
  • ISSN: 1549-8328

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