TY - GEN
T1 - A virtual layered space-frequency receiver for multiuser MIMO-OFDM systems
AU - Taya, Akihito
AU - Denno, Satoshi
AU - Umehara, Daisuke
AU - Morikura, Masahiro
AU - Murata, Hidekazu
AU - Yamamoto, Koji
AU - Yoshida, Susumu
PY - 2011/12/23
Y1 - 2011/12/23
N2 - In this paper, we propose a virtual layered spacefrequency receiver with an ordered successive detector for multiuser multiple-input multiple-output (MU-MIMO) systems where multiple transmitters cooperate with one another. The proposed receiver enables high-speed transmission in the systems even if the transmitters know only partial channel state information (CSI). Actually, the receiver shows such superior performance when the concept of "virtual channel" is applied to cooperative MU-MIMO systems. Moreover, we propose an iterative detection scheme for the receiver; in this scheme, some signals from the Viterbi decoder are fed back to the ordered successive detector. The proposed iterative scheme helps improve the transmission speed when the number of cooperating transmitters is increased. We evaluate the performance of MIMO systems in which the transmitters have four antennas each and two users have two antennas. The receiver can double the transmission speed at the cost of 3 dB in E b/N 0 at a BER of 10 -4. Furthermore, the receiver can triple the transmission speed at the cost of 7 dB in E b/N 0 at a BER of 10 -4. When the system has three transmitters, we observe an error floor. However, the proposed iterative method can suppress the error to a value below BER = 10 -7.
AB - In this paper, we propose a virtual layered spacefrequency receiver with an ordered successive detector for multiuser multiple-input multiple-output (MU-MIMO) systems where multiple transmitters cooperate with one another. The proposed receiver enables high-speed transmission in the systems even if the transmitters know only partial channel state information (CSI). Actually, the receiver shows such superior performance when the concept of "virtual channel" is applied to cooperative MU-MIMO systems. Moreover, we propose an iterative detection scheme for the receiver; in this scheme, some signals from the Viterbi decoder are fed back to the ordered successive detector. The proposed iterative scheme helps improve the transmission speed when the number of cooperating transmitters is increased. We evaluate the performance of MIMO systems in which the transmitters have four antennas each and two users have two antennas. The receiver can double the transmission speed at the cost of 3 dB in E b/N 0 at a BER of 10 -4. Furthermore, the receiver can triple the transmission speed at the cost of 7 dB in E b/N 0 at a BER of 10 -4. When the system has three transmitters, we observe an error floor. However, the proposed iterative method can suppress the error to a value below BER = 10 -7.
UR - http://www.scopus.com/inward/record.url?scp=83755163255&partnerID=8YFLogxK
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U2 - 10.1109/VETECF.2011.6092886
DO - 10.1109/VETECF.2011.6092886
M3 - Conference contribution
AN - SCOPUS:83755163255
SN - 9781424483273
T3 - IEEE Vehicular Technology Conference
BT - 2011 IEEE Vehicular Technology Conference Fall, VTC Fall 2011 - Proceedings
T2 - IEEE 74th Vehicular Technology Conference, VTC Fall 2011
Y2 - 5 September 2011 through 8 September 2011
ER -