Inter-symbol interference in high data rate UWB communications using energy detector receivers

Inter-symbol interference (ISI) is known to be a major factor complicating the realization of high data rate ultrawideband (UWB) communications. In the literature, methods for suppressing ISI in UWB systems employing complex receivers exist. In this paper, considering the low cost requirement along with the need for high data rates, we propose a modified, on-off keying (OOK) based low complexity energy detector receiver capable of eliminating ISI. The presented receiver utilizes an ISI cancellation algorithm depending on decision feedback equalization (DFE) and it is advantageous in that it does not suffer from error propagation. The results obtained demonstrate a considerable gain in the symbol detection performance of the UWB system.