Comparison performance of the DS chaotic and IR chaotic UWB systems

The IEEE802.15.4a Task Group for wireless personal area networks (WPAN) is working on an ultra-wideband (UWB) radio standard for the indoor sensor network applications. In 4a Task Group, various modulation and signal sources are being proposed to find the sensor network solutions satisfied with low cost and low power consumption. Among of them, the non-coherent direct sequences (DS) chaotic system using on-off keying (OOK) modulation and impulse radio (IR) chaotic system used pulse position modulation (PPM) are considered in this paper. This paper shows system performance which is shown by virtual simulation using channel model defined by IEEE802.15.4a Task Group channel model and compare the results from the real environment test between two schemes Through real environment tests, we can inform that the DS chaotic system is more sensitive for the channel conditions generated reflection and scattering of field test room. The IR chaotic system is more dependent on path loss according to the distance change than channel condition. Thus, we can determine the feasibility and compatibility of chaotic UWB system in order to operate the sensor network systems. Also, we show the possibility that the transceiver of chaotic system can be implemented into low complexity, low cost and low power consumption.