Modulation-adaptive cooperation in Rayleigh fading channels with imperfect CSI

Adaptive modulation can improve the throughput of cooperative communications, which has been shown in previous research. So far the adaptive modulation is applied with respect to perfect transmitter side Channel State Information (CSI) in most current work. In this paper we have investigated the modulation-adaptive cooperation in Rayleigh fading channels providing imperfect CSI at senders. The adaptive modulation scheme with rate adaptation at the relay proposed in our previous work has been extended here first. Then a new adaptive modulation scheme with adaptation at both the source and relay is proposed. Simulation results show the proposed two schemes can provide significant improvement in throughput over the fixed DF relaying cooperation even with imperfect feedback; the throughput can be further improved with the proposed scheme allowing adaptive modulation at both the source and relay. Categories and Subject Descriptors C.2.1 [Computer-Communication Networks]: Network Archite...

• Type: Conference
• Year: 2010
• Where: IWCMC
• Authors: Yuanyuan Zhang, Yi Ma, Rahim Tafazolli
• Keywords: Adaptive Modulation, Adaptive Modulation Scheme, IWCMC 2010, Keywords Adaptive Modulation