2008 Volume 128 Issue 2 Pages 231-241
In this paper, a new modulation scheme, Pulse-position Multi-Pulse Modulation (PMM) which is a combination of MPM (Multi-Pulse Modulation) and PPM (Pulse Position Modulation), has been proposed in order to increase the total data rate and improve the error performance. By this scheme, the data-modulated pulse can be used for transmitting more than one bit data depending on the level of modulation. Moreover, the error performance has been improved because for the same Eb/N0, the energy per pulse has increased. In addition, the multiple access performance of the proposed system has been improved because of more transmitted data bits per pulse. The simulation results show that the total throughput performance of the proposed system has been improved, nearly 5-6 times when compared to the conventional TR-UWB communication system. Because of the higher data rate with a good error performance, the proposed system should be one of good candidates for high data rate communication system.