Title :
Power Allocation for OFDM-DF Cooperative Communication
Author :
Chen Yueyun ; Hu Xining ; Tan Zhenhui
Author_Institution :
State Key Lab. of Rail Traffic Control & Safety, Beijing Jiaotong Univ., Beijing, China
Abstract :
A minimized power allocation scheme in a cooperative communication manner is studied to low power consumption and extent service life for transmission nodes. The model of the minimizing transmission power allocation for each sub-carrier of source node and relay node is not a convex problem, so it is difficult to find the global optimal solution. A new scheme of Decode-and-Forward Power Allocation (OFDM-DF-PA) is proposed. First, the power is allocated between source and relay node after sub-carrier is allocated under a given transmission power for each sub-carrier. Second, the power of each sub-carrier is allocated individually in source and relay node. Then, three different schemes of Non-cooperative Power Allocation (NPA), Equal Power Allocation (EPA) and OFDM-DF Power Allocation are compared. Simulation results show that OFDM-DF-PA consumes less power than the EPA and the NPA under the same BER performance in cooperative OFDM system with Frequency Reuse Factor of 1.
Keywords :
OFDM modulation; decode and forward communication; error statistics; BER; OFDM-DF cooperative communication; OFDM-DF-PA; cooperative OFDM system; decode-and-forward power allocation; equal power allocation; low power consumption; noncooperative power allocation; relay node; source node sub-carrier; transmission power allocation minimization; Base stations; Bit error rate; Interference; OFDM; Relays; Resource management; Signal to noise ratio; OFDM; cooperative communication; interference; power allocation;
Conference_Titel :
Communications and Mobile Computing (CMC), 2011 Third International Conference on
Conference_Location :
Qingdao
Print_ISBN :
978-1-61284-312-4
DOI :
10.1109/CMC.2011.33
