A b-Bit Non-Coherent Receiver Based on a Digital Code Matched Filter for Low Data Rate TH-PPM-UWB Systems in the Presence of MUI

We propose a b-bit non-coherent receiver based on a Digital Code Matched Filter (DCMF) for a low data rate Time- Hopping Pulse Position Modulation Ultra Wide Band (TH-PPMUWB) system. The DCMF follows after a high-speed but lowresolution (b-bit, 1 ≤ b ≤ 4) Analog-to-Digital Convertor (ADC) and is employed before the non-coherent detection. It is matched to the user-specific sequence and restricts the non-coherent combining only to the multipath arrivals. The performance of the proposed receiver is analyzed in the presence of Multi- User Interference (MUI), considering both perfect and imperfect power control. The influence of Automatic Gain Control (AGC) for the b-bit ADC (b ≠ 1) plays an important role in the system performance. To suppress the strong interference, a b-bit adaptive non-coherent receiver based on a DCMF is proposed, providing a high robustness to the MUI. We also discuss the selection of the TH codes and the corresponding parameters that trade-off the receiver performance.