Miller-coded PPM UWB transreceiver for low-rate WBAN networks with non-coherent detection

摘要

Ultra Wide Band (UWB) is an appropriate candidate used into the physical layer of the Wireless Body Area Networks (WBAN). In this paper, a novel UWB transreceiver structure is presented, where a Miller encoder is adopted in the transmitter side and a non-coherent detection scheme is used in the receiver side. Since the Power Spectral Density (PSD) of the UWB signal plays a major role in the coexistence with conventional radio systems, a mathematical framework evaluating the PSD of the proposed pulse radio signal is presented, and it is proved that the proposed scheme smoothes the spectrum which is useful for the coexistence with other conventional radio systems. The transreceiver structure is discussed in detail with a non-coherent detection receiver. The receiving performance is investigated by the simulations, and it is proved that the system is reasonable and the requirement of the WBAN system can be completely satisfied by analyzing the link budget of the system. Analyses and simulations show that the proposed scheme has a higher power efficiency and it is easy to match the FCC radiation requirement mask compared with the conventional UWB systems; furthermore, the proposed scheme is easy to be realized. The proposed scheme is more suitable for WBAN systems than the conventional pulse-based UWB systems.