VLSI Implementation of a Scalable K-best MIMO Detector


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.

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Description/Abstract

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.

Item Type: Conference or Workshop Item (Paper)
Venue - Dates: The 15th International Symposium on Communications and Information Technologies (ISCIT 2015), Japan, 2015-10-01
Organisations: EEE
ePrint ID: 379692
Date :
Date Event
October 2015Published
Date Deposited: 27 Jul 2015 13:18
Last Modified: 17 Apr 2017 05:32
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/379692

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