Jia, XiaolunZhou, Xiangyun2025-12-172025-12-172334-0983ORCID:/0000-0001-8973-9079/work/162683565https://hdl.handle.net/1885/733795929We consider the use of a backscatter device as a relay, and examine a new decode-and-forward (DF) scheme specifically designed for backscatter relaying. In the proposed scheme, the source node transmits continuous-wave (CW) signals to power the backscatter relay in the relay-to-destination phase of the data transmission. We characterise the end-to-end bit error rate (BER) performance for on-off keying (OOK) modulation. In addition, we formulate and solve a power allocation problem at the source node, where the source is subject to a power budget constraint. Numerical results show that the relay-to-destination link is the bottleneck for the end-to-end performance; and that it is essential to allocate most of the source's power budget to its transmission of CW signals to power the relay's transmission.ACKNOWLEDGEMENT This work was supported by the Australian Research Council’s Discovery Project Funding Scheme under Project DP170100939.enPublisher Copyright: © 2019 IEEE.201910.1109/GLOBECOM38437.2019.901431585081982409