TY - GEN
T1 - Pilot beamforming for massive machine type communication systems
AU - Ji, Hyoungju
AU - Choi, Jun Won
AU - Shim, Byonghyo
N1 - Funding Information:
This work was sponsored by the National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (2016R1A2B3015576) and (2014R1A5A1011478).
Publisher Copyright:
© 2017 IEEE.
PY - 2018/4/2
Y1 - 2018/4/2
N2 - In this paper, we propose a novel pilot beamforming and CSI acquisition strategy for machine-Type-communication systems to achieve reduction in pilot overhead and improve the channel estimation performance. Key idea of the proposed beam-forming technique is to sparsify the time-domain channel vector using the beamforming. To be specific, using the deliberately designed beamforming weight, we minimize nonzero taps and thus sparsify the (beamformed) channel vector. Due to this, only a few samples are required to perform the channel estimation of beamformed pilots so that whole CSI can be acquired with partial pilot symbols in time and frequency. From the numerical evaluations, we show that the proposed scheme outperforms conventional channel estimation schemes, and achieves NT-fold reduction in the pilot overhead. Also, the proposed scheme can be applied for beamforming weight of energy harvesting.
AB - In this paper, we propose a novel pilot beamforming and CSI acquisition strategy for machine-Type-communication systems to achieve reduction in pilot overhead and improve the channel estimation performance. Key idea of the proposed beam-forming technique is to sparsify the time-domain channel vector using the beamforming. To be specific, using the deliberately designed beamforming weight, we minimize nonzero taps and thus sparsify the (beamformed) channel vector. Due to this, only a few samples are required to perform the channel estimation of beamformed pilots so that whole CSI can be acquired with partial pilot symbols in time and frequency. From the numerical evaluations, we show that the proposed scheme outperforms conventional channel estimation schemes, and achieves NT-fold reduction in the pilot overhead. Also, the proposed scheme can be applied for beamforming weight of energy harvesting.
UR - http://www.scopus.com/inward/record.url?scp=85049609751&partnerID=8YFLogxK
U2 - 10.1109/ICCChina.2017.8330318
DO - 10.1109/ICCChina.2017.8330318
M3 - Conference contribution
AN - SCOPUS:85049609751
T3 - 2017 IEEE/CIC International Conference on Communications in China, ICCC 2017
SP - 1
EP - 5
BT - 2017 IEEE/CIC International Conference on Communications in China, ICCC 2017
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2017 IEEE/CIC International Conference on Communications in China, ICCC 2017
Y2 - 22 October 2017 through 24 October 2017
ER -