Single Carrier Block Transmission Without Guard Interval

This paper proposes a simple detection scheme for a single carrier block transmission (SCBT) without guard interval (GI). Although the SCBT without the GI can significantly increase bandwidth efficiency, the received signal suffers from interblock interference (IBI) and intersymbol interference (ISI), which cannot be effectively equalized by a frequency domain equalizer (FDE). In the proposed scheme, the IBI is cancelled by using a previously detected signal. Moreover, taking advantage of the temporal localization of the difference of the ISI component between the received signal with and without CP, we change the channel matrix from Toeplitz structure into a circulant matrix in order to utilize the conventional FDE. Computer simulation results show that the proposed scheme can outperform a linear MMSE equalizer with lower computational complexity