Joint Power and Bit-rate Allocation for Multi-carrier Wireless Bidirectional Relaying Systems

Abstract

This paper studied a power and bit-rate allocation optimization problem of a multi-carrier wireless bidirectional relaying system with the aim of minimizing the total transmit-power of the system. By using channel knowledge at the transmitters, the optimization problem was solved analytically, resulting in a joint power and bit-rate allocation algorithm. Simulation results confirmed the effectiveness of the proposed algorithm. It is shown that with the proposed power and bit-rate allocation algorithm, the total transmit-power of the system can be significantly reduced in contrast to the compared schemes.