TY - GEN
T1 - Tree search space reduction for soft-input soft-output sphere decoding in MIMO systems
AU - Zhang, Dan
AU - Lai, I. Wei
AU - Ascheid, Gerd
PY - 2011
Y1 - 2011
N2 - For soft-input soft-output sphere decoding (SD), the combination of the Schnorr-Euchner (SE) enumeration and the radius reduction shrink the search space quickly but with considerable computational complexity. In this paper, a low complexity approach is proposed to reduce the tree search space before SD starts. Particularly, such reduction is achieved by 1) tightening the initial radius; 2) restricting the search space to a subset of the symbol lattice. With further enhancement on the tree pruning constraint, simulation results demonstrate significant complexity savings with negligible error rate performance loss.
AB - For soft-input soft-output sphere decoding (SD), the combination of the Schnorr-Euchner (SE) enumeration and the radius reduction shrink the search space quickly but with considerable computational complexity. In this paper, a low complexity approach is proposed to reduce the tree search space before SD starts. Particularly, such reduction is achieved by 1) tightening the initial radius; 2) restricting the search space to a subset of the symbol lattice. With further enhancement on the tree pruning constraint, simulation results demonstrate significant complexity savings with negligible error rate performance loss.
UR - http://www.scopus.com/inward/record.url?scp=80051972484&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80051972484&partnerID=8YFLogxK
U2 - 10.1109/VETECS.2011.5956186
DO - 10.1109/VETECS.2011.5956186
M3 - Conference contribution
AN - SCOPUS:80051972484
SN - 9781424483310
T3 - IEEE Vehicular Technology Conference
BT - 2011 IEEE 73rd Vehicular Technology Conference, VTC2011-Spring - Proceedings
T2 - 2011 IEEE 73rd Vehicular Technology Conference, VTC2011-Spring
Y2 - 15 May 2011 through 18 May 2011
ER -