Physical Layer Network Coding Using Gaussian Waveforms: A Link Level Performance Analysis

Using general waveforms has recently gained omnipresent attention for robustness in systems under practical constraints. In this paper, two way relaying networks using physical layer network coding utilizing a multicarrier scheme with Gaussian waveforms are analyzed. This combination is introduced to be more robust against the impact of carrier frequency offsets and timing offsets. In two way relaying a multiple access phase is applied, where both users transmit their messages simultaneously on the same resources to an assisting relay. Here, a superposition of both signals containing the influence of the individual channels is received. The additional interference introduced by the non-orthogonal Gaussian filter is treated by a linear equalizer. To reduce complexity the equalizer is simplified to treat adjacent symbols in the time-frequency grid, only. To evaluate the overall performance of the introduced equalizer, different decoding strategies are analyzed by means of a link level simulations.