@article {,
	title = {DS-UWB indoor positioning system implementation based on FPGAs},
	journal = {Sensors and Actuators A: Physical},
	volume = {201},
	year = {2013},
	month = {10/2013},
	pages = {172 - 181},
	abstract = {In Ultra-Wideband (UWB) Local Positioning Systems (LPS), Inter-Symbol Interference (ISI), Multiple-Access Interference (MAI) and near-far effect are significant issues that can limit system performance.This paper presents a DS-UWB (Direct Sequence UWB) LPS based on FPGAs (Field-Programmable GateArray) and on commercially available Radio-Frequency (RF) modules. In contrast to other DS-UWB LPS,which uses TDMA (Time Division Multiple Access) and base-band pulses with low-repetition frequencyrates, the proposal uses QS-CDMA (Quasi-Synchronous Code Division Multiple Access) techniques withLoosely Synchronized (LS) spreading sequences. This allows to deal with ISI, MAI and near-far effect, aswell as to use very large spreading sequences to increase the processing gain.},
	issn = {09244247},
	doi = {10.1016/j.sna.2013.06.019},
	author = {Garc{\'\i}a, Enrique and Poudereux, Pablo and {\'A}lvaro Hern{\'a}ndez and J.J. Garcia and Ure{\~n}a, J.}
}
