Limited Feedback Power Control for Physical Layer Network Coding via Power Ratio Quantization

Decode-and-forward physical layer network coding (PLNC) is one of the promising high-performance techniques for wireless relay networks. This paper studies the limited feedback power control for PLNC. The limited feedback ratios are designed based on the channels´ statistical properties. Simulation proves the effectiveness of the proposed scheme. We show that for BPSK modulation, power control with 3 feedback bits can bring a #36;2-3dB#36; gain in terms of SER, and for QPSK modulation power control is only beneficial when it is combined with phase control.