TY - GEN
T1 - Low-complexity MMSE combining for linear impulse radio UWB receivers
AU - Gezici, Sinan
AU - Molisch, Andreas F.
AU - Kobayashi, Hisashi
AU - Poor, H. Vincent
PY - 2006/12/1
Y1 - 2006/12/1
N2 - Due to the fine delay resolution of typical ultra wideband (UWB) systems, Rake receivers need to combine samples from a large number of multipath components (MPCs) in order to collect sufficient signal energy for reliable decisions. In addition, these samples need to be combined optimally in order to minimize bit error probability. The optimal linear minimum mean square error (MMSE) combining scheme might require inversion of a large matrix depending on channel and system parameters. Therefore, suboptimal algorithms with lower computational complexity but close-to-optimal performance are desirable. In this paper, a low-complexity combining scheme is proposed for that purpose, which divides samples into a number of groups and performs MMSE combining in two steps. Performance of this two-step combining scheme is investigated theoretically and by simulations.
AB - Due to the fine delay resolution of typical ultra wideband (UWB) systems, Rake receivers need to combine samples from a large number of multipath components (MPCs) in order to collect sufficient signal energy for reliable decisions. In addition, these samples need to be combined optimally in order to minimize bit error probability. The optimal linear minimum mean square error (MMSE) combining scheme might require inversion of a large matrix depending on channel and system parameters. Therefore, suboptimal algorithms with lower computational complexity but close-to-optimal performance are desirable. In this paper, a low-complexity combining scheme is proposed for that purpose, which divides samples into a number of groups and performs MMSE combining in two steps. Performance of this two-step combining scheme is investigated theoretically and by simulations.
UR - http://www.scopus.com/inward/record.url?scp=42549140182&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=42549140182&partnerID=8YFLogxK
U2 - 10.1109/ICC.2006.255383
DO - 10.1109/ICC.2006.255383
M3 - Conference contribution
AN - SCOPUS:42549140182
SN - 1424403553
SN - 9781424403554
T3 - IEEE International Conference on Communications
SP - 4706
EP - 4711
BT - 2006 IEEE International Conference on Communications, ICC 2006
T2 - 2006 IEEE International Conference on Communications, ICC 2006
Y2 - 11 July 2006 through 15 July 2006
ER -