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VLSI Implementation of a Scalable K-best MIMO Detector

Record type: Conference or Workshop Item (Paper)

Multiple-input multiple-output (MIMO) communication
systems enable high data rates to be achieved compared
to single-antenna systems, however, they also incur a huge complexity cost at the receiver. For tree search MIMO detection
techniques such as the K-best algorithm, the critical path length
of the detector is also found to scale linearly with the number
of antennas, which limits the maximum clock frequency that
can be achieved especially at larger MIMO dimensions. In this
paper, we present a novel K-best architecture that incurs a
fixed critical path length irrespective of the number of antennas.
This is achieved by incrementally computing the interference
terms of previously detected symbols rather than computing
them at once like in the conventional K-best detector. Synthesis
results show that the optimized detector achieves approximately
a 2? maximum clock frequency improvement compared with the
conventional K-best implementation. We also present an approximate
sorting algorithm that determines the best candidates with
a low complexity. The proposed K-best detector is implemented
for a 4 ? 4 64-QAM MIMO system using a folded architecture
and a single core is able to achieve a throughput of 300 Mbps and
an energy efficiency of 83.39 nJ/bit, which compares favourably
with other folded architectures in the literature.

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Citation

Bello, Ibrahim A., Halak, Basel, El-Hajjar, Mohammed and Zwolinski, Mark (2015) VLSI Implementation of a Scalable K-best MIMO Detector At The 15th International Symposium on Communications and Information Technologies (ISCIT 2015), Japan.

More information

Published date: October 2015
Venue - Dates: The 15th International Symposium on Communications and Information Technologies (ISCIT 2015), Japan, 2015-10-01
Organisations: EEE

Identifiers

Local EPrints ID: 379692
URI: http://eprints.soton.ac.uk/id/eprint/379692
PURE UUID: 82704876-3839-4d1f-8373-d4927cee4233
ORCID for Mohammed El-Hajjar: ORCID iD orcid.org/0000-0002-7987-1401
ORCID for Mark Zwolinski: ORCID iD orcid.org/0000-0002-2230-625X

Catalogue record

Date deposited: 27 Jul 2015 13:18
Last modified: 17 Jul 2017 20:41

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Contributors

Author: Ibrahim A. Bello
Author: Basel Halak
Author: Mohammed El-Hajjar ORCID iD
Author: Mark Zwolinski ORCID iD

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