TY - GEN
T1 - Ergodic rate analysis of power allocation schemes in two-way decode-and-forward relay systems
AU - Chen, Chen
AU - Yang, Yehua
AU - Bai, Lin
AU - Jin, Ye
AU - Choi, Jinho
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015
Y1 - 2015
N2 - Most previous researches on the rate analysis of the power allocation (PA) schemes in two-way decode-and-forward (DF) relay systems typically focus on maximizing the instantaneous objective rates. However, the ergodic rate analysis of the optimized rates is not well considered. In this paper, we investigate the ergodic rates of the PA schemes in a two-way DF relay system, where the physical-layer network coding (PNC) protocol is adopted. Specifically, under a total power constraint, we consider three heuristic PA schemes, in which the optimization objectives are: 1) maximizing the sum rate; 2) maximizing the sum rate with an additional rate fairness constraint; and 3) maximizing the minor rate of the two directions of the system. The cumulative distribution functions (CDFs) of the equivalent system SNR are approximately obtained and the analytical expressions for the calculations of the ergodic rates are theoretically derived. Numerical results show that the derived analytical rates are converged to the simulated results in high SNR regions.
AB - Most previous researches on the rate analysis of the power allocation (PA) schemes in two-way decode-and-forward (DF) relay systems typically focus on maximizing the instantaneous objective rates. However, the ergodic rate analysis of the optimized rates is not well considered. In this paper, we investigate the ergodic rates of the PA schemes in a two-way DF relay system, where the physical-layer network coding (PNC) protocol is adopted. Specifically, under a total power constraint, we consider three heuristic PA schemes, in which the optimization objectives are: 1) maximizing the sum rate; 2) maximizing the sum rate with an additional rate fairness constraint; and 3) maximizing the minor rate of the two directions of the system. The cumulative distribution functions (CDFs) of the equivalent system SNR are approximately obtained and the analytical expressions for the calculations of the ergodic rates are theoretically derived. Numerical results show that the derived analytical rates are converged to the simulated results in high SNR regions.
KW - Ergodic rate
KW - Physical layer network coding
KW - Power allocation
KW - Two-way relay system
UR - https://www.scopus.com/pages/publications/84964526730
U2 - 10.1109/VTCFall.2015.7390931
DO - 10.1109/VTCFall.2015.7390931
M3 - 会议稿件
AN - SCOPUS:84964526730
T3 - IEEE Vehicular Technology Conference
BT - 2015 IEEE 82nd Vehicular Technology Conference, VTC2015-Fall, Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 82nd IEEE Vehicular Technology Conference, VTC 2015-Fall
Y2 - 6 September 2015 through 9 September 2015
ER -