TY - GEN
T1 - Hybrid Precoding in Millimeter Wave Systems
T2 - 2017 IEEE Global Communications Conference, GLOBECOM 2017
AU - Yu, Xianghao
AU - Zhang, Jun
AU - Letaief, Khaled B.
N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].
PY - 2017/7/1
Y1 - 2017/7/1
N2 - Hybrid precoding has been recently proposed as a cost- effective transceiver solution for millimeter wave (mm- wave) systems. The analog component in such precoders, which is composed of a phase shifter network, is the key differentiating element in contrast to conventional fully digital precoders. While a large number of phase shifters with unquantized phases are commonly assumed in existing works, in practice the phase shifters should be discretized with a coarse quantization, and their number should be reduced to a minimum due to cost and power consideration. In this paper, we propose a new hybrid precoder implementation using a small number of phase shifters with quantized and fixed phases, i.e., a fixed phase shifter (FPS) implementation, which significantly reduces the cost and hardware complexity. In addition, a dynamic switch network is proposed to enhance the spectral efficiency. Based on the proposed FPS implementation, an effective alternating minimization (AltMin) algorithm is developed with closed-form solutions in each iteration. Simulation results show that the proposed algorithm with the FPS implementation outperforms existing ones. More importantly, it needs much fewer phase shifters than existing hybrid precoder proposals, e.g., ~10 fixed phase shifters are sufficient for practically relevant system settings.
AB - Hybrid precoding has been recently proposed as a cost- effective transceiver solution for millimeter wave (mm- wave) systems. The analog component in such precoders, which is composed of a phase shifter network, is the key differentiating element in contrast to conventional fully digital precoders. While a large number of phase shifters with unquantized phases are commonly assumed in existing works, in practice the phase shifters should be discretized with a coarse quantization, and their number should be reduced to a minimum due to cost and power consideration. In this paper, we propose a new hybrid precoder implementation using a small number of phase shifters with quantized and fixed phases, i.e., a fixed phase shifter (FPS) implementation, which significantly reduces the cost and hardware complexity. In addition, a dynamic switch network is proposed to enhance the spectral efficiency. Based on the proposed FPS implementation, an effective alternating minimization (AltMin) algorithm is developed with closed-form solutions in each iteration. Simulation results show that the proposed algorithm with the FPS implementation outperforms existing ones. More importantly, it needs much fewer phase shifters than existing hybrid precoder proposals, e.g., ~10 fixed phase shifters are sufficient for practically relevant system settings.
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UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85046403710&origin=recordpage
U2 - 10.1109/GLOCOM.2017.8254864
DO - 10.1109/GLOCOM.2017.8254864
M3 - RGC 32 - Refereed conference paper (with host publication)
SN - 9781509050192
VL - 2018-January
T3 - 2017 IEEE Global Communications Conference, GLOBECOM 2017 - Proceedings
SP - 1
EP - 6
BT - 2017 IEEE Global Communications Conference, GLOBECOM 2017 - Proceedings
PB - IEEE
Y2 - 4 December 2017 through 8 December 2017
ER -