TY - GEN
T1 - Low complexity list updating circuits for list sphere decoders
AU - Zhang, Yuping
AU - Tang, Jun
AU - Parhi, Keshab K
N1 - Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.
PY - 2006
Y1 - 2006
N2 - Sphere decoder has been introduced to the multiple-input-multiple-output (MIMO) communication systems, with which the maximum likelihood (ML) detection becomes feasible. In order to combine the sphere decoders with the outer channel code decoder, researchers have proposed to include a candidate list in the sphere decoder to provide soft information to the channel code decoder. This algorithm is called list sphere decoder (LSD). In the LSD, different from the conventional sphere decoder (CSD), the candidate list introduces significant hardware overhead. In this paper, we propose to use a tree-type comparator array, a link table and sublists to reduce the hardware complexity of inserting new candidates into the list. Combining these techniques, we can reduce the complexity by around 90% compared with the straightforward implementations.
AB - Sphere decoder has been introduced to the multiple-input-multiple-output (MIMO) communication systems, with which the maximum likelihood (ML) detection becomes feasible. In order to combine the sphere decoders with the outer channel code decoder, researchers have proposed to include a candidate list in the sphere decoder to provide soft information to the channel code decoder. This algorithm is called list sphere decoder (LSD). In the LSD, different from the conventional sphere decoder (CSD), the candidate list introduces significant hardware overhead. In this paper, we propose to use a tree-type comparator array, a link table and sublists to reduce the hardware complexity of inserting new candidates into the list. Combining these techniques, we can reduce the complexity by around 90% compared with the straightforward implementations.
UR - http://www.scopus.com/inward/record.url?scp=46249118169&partnerID=8YFLogxK
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U2 - 10.1109/SIPS.2006.352550
DO - 10.1109/SIPS.2006.352550
M3 - Conference contribution
AN - SCOPUS:46249118169
SN - 1424403820
SN - 9781424403820
T3 - 2006 IEEE Workshop on Signal Processing Systems Design and Implementation, SIPS
SP - 28
EP - 33
BT - 2006 IEEE Workshop on Signal Processing Systems Design and Implementation, SIPS
T2 - IEEE Workshop on Signal Processing Systems, SIPS 2006
Y2 - 2 October 2006 through 4 October 2006
ER -