Pulse detection algorithm for line-of-sight (LOS) UWB ranging applications

The Future of Ultra Wideband Systems in Medicine: Orthopedic Surgical Navigation

“…Table 2 provides a summary of the various research groups utilizing these three approaches for high accuracy indoor positioning. Similar accuracy levels (0.5-20 cm) have been achieved for both carrier-based Waldmann, 2008;McEwan, 2004) and impulse-based (Low, 2005;Zetik, 2004;Ossberger, 2004;Fuiji, 2007) UWB positioning systems, although carrier-based systems have shown the potential for mm and sub-mm range accuracy even for 3-D indoor environments McEwan, 2004). FMCW has proven to be a successful competing technology for high accuracy positioning systems (Stelzer, 1999Mosshammer, 2007;Tragas, 2007;Feger, 2009).…”

Filter Bank-based Transceiver Design for Ultrawideband

“…In the work by (Chung & Ha, 2003), the peak of match-filtering output was considered as the location of the direct path, but this is only applicable for LOS situations with transceiver antennas being omnidirectional. Threshold detection was conducted in (Low et al, 2005) and (Lee & Yoo, 2006), but presenting some difficulties for a practical implementation. Traditional tracking loops were implemented based on phase-locked loops (PLLs) and baseband code tracking delay-locked loops (DLLs).…”

Multiresolution wavelet denoising for ultra-wideband time-of-arrival estimation with regularized least squares

“…Note that with λ = 0 the solution to (8) reduces to the LS one. With λ > 0, it is straightforward to show that the unique global solution to (8) is given byâ…”

“…In all of the above contributions except [4], the performance was mostly evaluated via computer simulation with no results pertaining to the realistic ranging application. In contrast, Low et al [8] demonstrated a FCCcompliant UWB ranging scheme in the line-of-sight (LOS) environment, and Falsi et al [9] illustrated a set of ToA estimators based on the indoor measurement data from [3]. Both cases employ the peak-detection-based (PDB) algorithms, with a simple threshold and detect of the former to the suboptimal, high-resolution, iterative ML channel estimators in the latter.…”