Spectral efficiency of cooperative full-duplex relaying with imperfect channel estimation

The impact of overhead on spectral efficiency for different cooperative relaying schemes is quantitatively analyzed in [1], in which half-duplex (HD) relaying is assumed for all cooperative nodes. With the recent development of cancellation methods for full-duplex (FD) relays or radios, FD has become feasible in practical implementations, providing a higher spectral efficiency than HD. In this paper, we model the residual self-loop interference and cross-talk interference caused by imperfect channel estimation, which is an extra overhead for FD compared with that of HD. Then, we analyze the overhead, outage probability and spectral efficiency of three typical cooperative relaying schemes (timer-based best-select, distributed space-time-coded relaying and M-group) operating in FD mode. Finally, numerical results are provided to compare the outage probability and spectral efficiency of HD and FD relaying.