Joint re-encoding and successive interference cancellation for multi-hop relay networks

In this paper, for single-source wireless ad hoc networks, we develop a joint re-encoding and successive interference cancellation (SIC) scheme to realize interference-immune multi-hop relaying. Interference immunity means that the transmission rate is not affected by the mutual interference among the relays. This leads to a greedy near-optimal algorithm that is similar to the Dijkstra´s algorithm for wireless relay selection and multi-hop routing. To evaluate the practical performance of this scheme, we analyze quantitatively the performance of SIC under channel model errors and channel estimation errors. The vital role of the relative signal strength and the training sequence length is determined. Simulations are conducted to demonstrate that the proposed scheme maximizes transmission rate and reduces scheduling overhead drastically.