Physical layer network coding in network MIMO: a new design for 5G and beyond

TY - JOUR

T1 - Physical layer network coding in network MIMO

T2 - a new design for 5G and beyond

AU - Peng, Tong

AU - Wang, Yi

AU - Burr, Alister Graham

AU - Shikh-Bahaei, Mohammad

N1 - © 2018 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details.

PY - 2018/12/11

Y1 - 2018/12/11

N2 - Physical layer network coding (PNC) has been studied to serve wireless network MIMO systems with much lower backhaul load than approaches such as Cloud Radio Access Network (Cloud-RAN) and coordinated multipoint (CoMP). In this paper, we present a design guideline of engineering applicable PNC to fulfil the request of high user densities in 5G wireless RAN infrastructure. We show that the proposed design criteria guarantee that 1) the whole system operates over binary system; 2) the PNC functions utilised at each access point overcome all singular fade states; 3) the destination can unambiguously recover all source messages while the overall backhaul load remains at the lowest level. We then develop a two-stage search algorithm to identify the optimum PNC mapping functions which greatly reduces the real-time computational complexity. The impact of estimated channel information and reduced number of singular fade states in different QAM modulation schemes are studied in this paper. Numerical results show that the proposed schemes achieve low outage probability with reduced backhaul load.

AB - Physical layer network coding (PNC) has been studied to serve wireless network MIMO systems with much lower backhaul load than approaches such as Cloud Radio Access Network (Cloud-RAN) and coordinated multipoint (CoMP). In this paper, we present a design guideline of engineering applicable PNC to fulfil the request of high user densities in 5G wireless RAN infrastructure. We show that the proposed design criteria guarantee that 1) the whole system operates over binary system; 2) the PNC functions utilised at each access point overcome all singular fade states; 3) the destination can unambiguously recover all source messages while the overall backhaul load remains at the lowest level. We then develop a two-stage search algorithm to identify the optimum PNC mapping functions which greatly reduces the real-time computational complexity. The impact of estimated channel information and reduced number of singular fade states in different QAM modulation schemes are studied in this paper. Numerical results show that the proposed schemes achieve low outage probability with reduced backhaul load.

KW - adaptive PNC

KW - unambiguous detection

KW - backhaul load

KW - industrial applicable

U2 - 10.1109/TCOMM.2018.2886184

DO - 10.1109/TCOMM.2018.2886184

M3 - Article

SN - 0090-6778

VL - 67

SP - 2024

EP - 2035

JO - IEEE Transactions on Communications

JF - IEEE Transactions on Communications

IS - 3

ER -