Superimposed pilot-interference aided channel estimation and joint signal detection in amplify-and-forward relaying systems
Yueming Cai, Jia Tu · 2010
In this paper, we consider an AF relaying system without direct channel between the source node and the destination node, and use superimposed pilots to estimate the overall channel state information (CSI). Considering the superimposed pilot-interference (SPI) at the destination node is useful for channel estimation and data detection because the pilots and the data undergo the same channel fading due to superimposed sending, we utilize SPI to estimate CSI and detect the sending data. Simulation results show that our proposed method improves the spectral efficiency and obtain the satisfactory performance because of using superimposed pilots instead of traditional pilots.