Performance of UWB Systems With Direct-Sequence Bipolar Pulse Amplitude Modulation and RAKE Reception over IEEE 802.15.3a Channel
Direct-Sequence Pulse Amplitude Modulation (DS-PAM) has been widely proposed for Ultra-WideBand (UWB) communication systems because it provides better performance with low computational complexity. UWB signals suffer from severe multi-path interference when employed in indoor fading environments. But using RAKE reception can make use of the rich multi-path of UWB systems to improve system performance. In this paper, the authors present the performance of a RAKE receiver employing Maximal Ratio Combining (MRC) in a DS UWB system with BPAM modulation. Performance in a practical multi-path fading Channel (IEEE 802.15.3a Channel) is considered to analyze the performance of DS-PAM UWB systems with different RAKE receivers.