Time Hopping Biorthogonal Pulse Position Modulation in Modified Saleh-Valenzuela UWB Fading Channels

Time hopping-biorthogonal pulse position modulation (TH-BPPM) performance is characterized using a modified Saleh-Valenzuela (S-V) ultra wideband (UWB) channel model as adopted by the IEEE for personal area networks (PANs). TH-BPPM performance is characterized for single and multiple user scenarios using up to 20 multipath signals from each of 10 users operating for both synchronous and asynchronous networks. Results show that TH-BPPM provides equivalent multiple access performance as binary techniques while providing typical m-ary signaling advantages. By comparison with previous AWGN channel results, multipath and multiple access interference effects are shown to provide greater performance degradation when using more realistic UWB channel models. Furthermore, it is shown that multipath interference (versus multiple access interference) is most dominant in fading channels