Time-Hopping M-Walsh UWB transmission scheme for a one-bit non-coherent receiver

We propose a Time-Hopping (TH) M-ary Walsh transmission scheme using a one-bit non-coherent receiver for power efficient and low complexity low data rate Ultra Wideband (UWB) communications. The analytical Bit Error Rate (BER) bounds of the M-Walsh modulation and the widely used M-ary Pulse Position Modulation (M-PPM) are derived and validated in the multipath scenario. We compare both schemes in terms of the receiver implementation and complexity, the quantization loss due to the one-bit receiver, and the multiple access performance. Taking into account the perfect/imperfect power control, the Multi-User Interference (MUI) resistance is evaluated via Monte Carlo simulations. According to the performance comparison and analysis, we show the suitability of the proposed TH M-Walsh scheme using a one-bit non-coherent UWB receiver to achieve a high power efficiency.