TY - GEN
T1 - Joint precoding and fronthaul optimization for C-RANs in ergodic fading channels
AU - Kang, Jinkyu
AU - Simeone, Osvaldo
AU - Kang, Joonhyuk
AU - Shamai, Shlomo
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/9/8
Y1 - 2015/9/8
N2 - This work investigates the joint design of fronthaul compression and precoding for the downlink of Cloud Radio Access Networks (C-RANs). The main goal is that of bringing insight into an aspect of the optimal functional split between Radio Units (RUs) and Central Unit (CU), namely: where should precoding be performed? Unlike previous works, we tackle this issue for a practical scenario with block-ergodic channels and either instantaneous or stochastic Channel State Information (CSI) at the CU. Optimization algorithms over fronthaul compression and precoding are proposed that are based on a stochastic successive upper-bound minimization approach. Via numerical results, the relative merits of two strategies, in which precoding is carried out at the CU or at the RUs, are evaluated as a function of system parameters such as fronthaul capacity and channel coherence time under either instantaneous or stochastic CSI at the CU.
AB - This work investigates the joint design of fronthaul compression and precoding for the downlink of Cloud Radio Access Networks (C-RANs). The main goal is that of bringing insight into an aspect of the optimal functional split between Radio Units (RUs) and Central Unit (CU), namely: where should precoding be performed? Unlike previous works, we tackle this issue for a practical scenario with block-ergodic channels and either instantaneous or stochastic Channel State Information (CSI) at the CU. Optimization algorithms over fronthaul compression and precoding are proposed that are based on a stochastic successive upper-bound minimization approach. Via numerical results, the relative merits of two strategies, in which precoding is carried out at the CU or at the RUs, are evaluated as a function of system parameters such as fronthaul capacity and channel coherence time under either instantaneous or stochastic CSI at the CU.
UR - http://www.scopus.com/inward/record.url?scp=84947731021&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84947731021&partnerID=8YFLogxK
U2 - 10.1109/ICCW.2015.7247584
DO - 10.1109/ICCW.2015.7247584
M3 - Conference contribution
AN - SCOPUS:84947731021
T3 - 2015 IEEE International Conference on Communication Workshop, ICCW 2015
SP - 2683
EP - 2688
BT - 2015 IEEE International Conference on Communication Workshop, ICCW 2015
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - IEEE International Conference on Communication Workshop, ICCW 2015
Y2 - 8 June 2015 through 12 June 2015
ER -