Adaptive Pre-Interpolation Multiuser Detector for Impulse Radio Systems

In multiuser impulse radio systems, the conventional detection methods always suffer from high complexity and poor robustness caused by dense multipath and long maximum excess delay of the nonline-of-sight (NLOS) channel. To detect the direct spread (DS) impulse signal, an adaptive pre-interpolation filter algorithm is introduced. By analysis and simulation, this adaptive interpolator applied before the decorrelator is proved to have a good steady-state performance of the adaptation.