This document discusses research related to ultra wideband (UWB) technology. It describes designing architectures and building blocks for UWB standards, including investigating low-cost transmitter and receiver designs with a focus on localization in multipath environments. It also discusses the design of UWB radio frequency front ends and analog-to-digital converters, including prototypes that have been implemented. Finally, it mentions U-SPOT, a UWB system-level simulator for positioning and tracking applications that models wireless channels and allows analysis of localization methods and system parameters.

1. 2A105 SHORT RANGE RADIO
ULTRA WIDE BAND (UWB)
From Silicon to Application
SR2
 Design and test architectures and building blocks for the emerging UWB standards
 Investigate low cost architectures for transmitters and receivers, including the antennas and propagation
studies, focusing localization in multipath intensive environments.
 Design chips/SoCs for MB-OFDM and ECMA-368
UWB RF FRONT END + ADC
RF frontend CMOS (IUMA-ULPGC) 6-bit 1GS/s Flash Analog-to-digital converter CMOS (AICIA)
 3.1 to 10.6 GHz frequency range  A new auto-zeroing technique for offset compensation
 528 MHz bandwidth per sub-band (53 Mbps-480Mbps) has been implemented
 Two prototypes have been designed  A 3-bit first prototype has been measured,
 LNA with shunt peaking load + IQ Gilbert cell mixer confirming post layout simulation results:
 LNA with resistive load + IQ Gilbert cell mixer with RC  SNDR = 28 dB (200mVpp@110Mhz) INLmax= 0.67
degeneration-> Inductor less  ENOB = 5.6 DNLmax=0.45
 Power consumption < 200 mW
www.aicia.es
LNA with shunt peaking load + IQ
LNA with shunt peaking load + IQ Gilbert cell mixer Gilbert cell mixer-Inductor less
LNA with shunt LNA with resistive load
peaking load + IQ + IQ Gilbert cell mixer with RC
Gilbert cell mixer .
degeneration
VCC 1.8 V 1.8 V
Power
16.11 mW 14.07 mW
Con. f
IIP3
-3.26 dBm -2.11 dBm
(5 GHz)
Gain
12.1 dB 7.2 dB
(5 GHz)
NF (5 GHz) 9.35 dB 13.71 dB
Area 0.97 mm2 0.52 mm2
6-bit 1-GS/s Flash Analog-to digital converter in 130nm CMOS with
www.iuma.ulpgc.es/users/tme demoboard
U-SPOT : UWB-System Level Simulator for
Positioning and Tracking
The simulator is based on:
 Impulse Ratio Ultra Wideband (IR-UWB)
TX: Transmitter  Measured channel impulse responses
CH: Wireless Channel  Line-of-sight (LOS) and non-LOS scenarios
RX: Receiver  Indoor and outdoor environments
LE: Location Estimation
 Stochastic environments
 Defined by the probability for LOS links
 Novel channel selection algorithm
 Defined by large scale fading decorrelation
function
 State switching probabilities
 User defined scenarios
The simulator is designed and used for:
 Analysis of standards, e.g. IEEE 802.15.4a UWB
 Analysis of system parameters and algorithms and
their influence on the overall localization performance
 Comparison of localization methods/algorithms
 SKF: Standard Kalman Filter, EKF: Extended KF, LS:
www.cisc.at/UWB Least Squares
 Extensive Monte-Carlo simulations