Physical-layer network coding (PNC) is a mean to improve the throughput in wireless communication models. In this lecture, I will first review the basic concept of physical-layer network coding over a two-way relay channel and, from an information-theoretical point of view, compare the performance of PNC with other transmission schemes such as routing, network-layer network coding, and analog network coding. Next, I will revisit the elegant algebraic framework of nested lattices to model PNC such that PNC can be practically designed and adopted in a more general wireless multiple-access relay network. In particular, PNC over the lattice structure of Gaussian integers and of Eisenstein integers will be emphasized.
Qifu (Tyler) Sun received the B.Eng. (first class honors) and Ph.D. degrees from the Department of Information Engineering, The Chinese University of Hong Kong in 2005 and 2009, respectively. He has been a postdoctoral fellow at the Institute of Network Coding, the Chinese University of Hong Kong and a visiting fellow at the University of New South Wales. He is currently a research associate in the Institute of Network Coding (Shenzhen), The Chinese University of Hong Kong. His research interests include fundamental study of network coding, channel coding and modulation, and algebraic study of communication networks.