Achievable Rates in Gaussian Half-Duplex Multiple Relay Networks

In this paper we analyze several protocols for Gaussian half-duplex multiple relay networks where each node either transmits or receives on a particular resource. We present achievable rates for a multilevel partial decode-and-forward approach which generalizes previous results presented by Kramer and Khojastepour et al. Furthermore, we present a compress- and-forward protocol and a mixed strategy which use a regular encoding scheme. Finally, we discuss results for a four-terminal line network and compare the performance for fixed and random transmission strategies as well as for coherent and non-coherent transmission.