TY - GEN
T1 - Frequency-domain QRM-MLD block signal detection for single-carrier multi-user MIMO uplink
AU - Itagaki, Masashi
AU - Takeda, Kazuki
AU - Adachi, Fumiyuki
PY - 2010/12/1
Y1 - 2010/12/1
N2 - Multi-user multi-input multi-output (multi-user MIMO) can increase the number of users simultaneously accessing the same base station (BS) without increasing the signal bandwidth. MIMO signal detection which can provide better bit error rate (BER) performance than linear detection with less computational complexity is indispensable in order to enhance the uplink cellular capacity of multi-user MIMO. Maximum likelihood detection (MLD) employing QR decomposition and M algorithm (QRM-MLD) is one of its candidates. It can reduce the complexity of MLD drastically and obtain BER performance close to MLD. QRM-MLD has been widely studied for MIMO spatial multiplexing using orthogonal frequency division multiplexing (OFDM). Recently, it has been reported that QRM-MLD can be applied to the signal detection of single-carrier (SC) transmission in a frequency selective fading channel. In this paper, we introduce the frequency-domain QRM-MLD block signal detection to the SC multi-user MIMO uplink of a cellular system and evaluate the uplink capacity. We show that QRM-MLD can obtain larger uplink cellular capacity compared to the minimum mean square error detection (MMSED) at the cost of the increased computational complexity, but with much less than MLD.
AB - Multi-user multi-input multi-output (multi-user MIMO) can increase the number of users simultaneously accessing the same base station (BS) without increasing the signal bandwidth. MIMO signal detection which can provide better bit error rate (BER) performance than linear detection with less computational complexity is indispensable in order to enhance the uplink cellular capacity of multi-user MIMO. Maximum likelihood detection (MLD) employing QR decomposition and M algorithm (QRM-MLD) is one of its candidates. It can reduce the complexity of MLD drastically and obtain BER performance close to MLD. QRM-MLD has been widely studied for MIMO spatial multiplexing using orthogonal frequency division multiplexing (OFDM). Recently, it has been reported that QRM-MLD can be applied to the signal detection of single-carrier (SC) transmission in a frequency selective fading channel. In this paper, we introduce the frequency-domain QRM-MLD block signal detection to the SC multi-user MIMO uplink of a cellular system and evaluate the uplink capacity. We show that QRM-MLD can obtain larger uplink cellular capacity compared to the minimum mean square error detection (MMSED) at the cost of the increased computational complexity, but with much less than MLD.
KW - Multi-user MIMO
KW - QRM-MLD
KW - Single-carrier
KW - Uplink capacity
UR - http://www.scopus.com/inward/record.url?scp=78651287113&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=78651287113&partnerID=8YFLogxK
U2 - 10.1109/ICNIDC.2010.5657869
DO - 10.1109/ICNIDC.2010.5657869
M3 - Conference contribution
AN - SCOPUS:78651287113
SN - 9781424468546
T3 - Proceedings - 2010 2nd IEEE International Conference on Network Infrastructure and Digital Content, IC-NIDC 2010
SP - 687
EP - 691
BT - Proceedings - 2010 2nd IEEE International Conference on Network Infrastructure and Digital Content, IC-NIDC 2010
T2 - 2010 2nd IEEE International Conference on Network Infrastructure and Digital Content, IC-NIDC 2010
Y2 - 24 September 2010 through 26 September 2010
ER -