TY - GEN
T1 - Hybrid radio frequency beamforming and baseband precoding for downlink MU-MIMO mmWave channels
AU - Chiu, Lin Kai
AU - Wu, Sau-Hsuan
PY - 2015/9/9
Y1 - 2015/9/9
N2 - A hybrid architecture of radio frequency (RF) beamforming (BF) and baseband (BB) signal processing is presented for downlink (DL) multi-user (MU) multiple input multiple output (MIMO) systems operating in millimeter wave (mmWave) channels. To avoid the strong spatial correlation and the transmission or reception dead zones caused by the use of single-polarized antenna arrays in mmWave radio, the hybrid architecture is implemented on dual-polarized (DP) planar antenna arrays (PAA). To balance the quality of each data stream of each user under a limited power consumption, an iterative algorithmfor jointly designing the RF beamformers (BFer), BB precoder, BB equalizers, and the power allocation is proposed for the DL MU-MIMO system of using the hybrid architecture. Simulation results show that the signal to interference-plus-noise ratio (SINR) achieved with the MU-MIMO system that uses the proposed hybrid architecture is only 5∼6 dB lower than that of the conventional one which uses 8 times more BB modules for the same 4 × 4 DP-PAA. Furthermore, the RF BFers obtained by the proposed iterative algorithm provide a better SINR than that of directly steering the RF BFs towards the line-of-sight transmission path.
AB - A hybrid architecture of radio frequency (RF) beamforming (BF) and baseband (BB) signal processing is presented for downlink (DL) multi-user (MU) multiple input multiple output (MIMO) systems operating in millimeter wave (mmWave) channels. To avoid the strong spatial correlation and the transmission or reception dead zones caused by the use of single-polarized antenna arrays in mmWave radio, the hybrid architecture is implemented on dual-polarized (DP) planar antenna arrays (PAA). To balance the quality of each data stream of each user under a limited power consumption, an iterative algorithmfor jointly designing the RF beamformers (BFer), BB precoder, BB equalizers, and the power allocation is proposed for the DL MU-MIMO system of using the hybrid architecture. Simulation results show that the signal to interference-plus-noise ratio (SINR) achieved with the MU-MIMO system that uses the proposed hybrid architecture is only 5∼6 dB lower than that of the conventional one which uses 8 times more BB modules for the same 4 × 4 DP-PAA. Furthermore, the RF BFers obtained by the proposed iterative algorithm provide a better SINR than that of directly steering the RF BFs towards the line-of-sight transmission path.
UR - http://www.scopus.com/inward/record.url?scp=84953718396&partnerID=8YFLogxK
U2 - 10.1109/ICC.2015.7248510
DO - 10.1109/ICC.2015.7248510
M3 - Conference contribution
AN - SCOPUS:84953718396
T3 - IEEE International Conference on Communications
SP - 1346
EP - 1351
BT - 2015 IEEE International Conference on Communications, ICC 2015
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - IEEE International Conference on Communications, ICC 2015
Y2 - 8 June 2015 through 12 June 2015
ER -